CN101451626A - Method for replacing valve sealing filler - Google Patents
Method for replacing valve sealing filler Download PDFInfo
- Publication number
- CN101451626A CN101451626A CNA2008102205744A CN200810220574A CN101451626A CN 101451626 A CN101451626 A CN 101451626A CN A2008102205744 A CNA2008102205744 A CN A2008102205744A CN 200810220574 A CN200810220574 A CN 200810220574A CN 101451626 A CN101451626 A CN 101451626A
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- China
- Prior art keywords
- valve
- sealing
- seal ring
- seal
- filler
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- 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.)
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Abstract
The invention discloses a method for changing valve gland packing, that is to say, a sealing ring is arranged between a sealing seat which is arranged on a valve rod and a valve cover. When the valve rod rises, the leak tightness of the valve can be ensured by the sealing ring, thus changing the gland packing above the sealing ring. The technical proposal provided by the invention realizes online changing the gland packing without stopping the valve running and has important positive role in energy saving and consumption reduction, and at the same time, the method provided by the invention has advantages of low cost and easy operation and popularization, greatly reduces the running cost of the pipeline system in the prior art and is beneficial to environmental protection.
Description
Technical field
The present invention relates to a kind of method of changing the valve seal filler, especially a kind of method of online replacing valve seal filler can not stop valve working and just can change stuffing box packing safely, belongs to the pipeline valve technical field.
Background technique
Present valve is gate valve especially, because of its fluid medium pressure height, after flashboard promotes, is full of high-pressure liquid in the valve body.The sealing at valve rod place generally is provided with the self-pressure type hard sealing structure and (also deserves to be called sealing.Be the sealing of metal to metal) so that protect valve stem packing better.Fig. 1 and Fig. 2 are the schematic representation of prior art sealing system; Fig. 1 is the situation of valve wide open; Fig. 2 is the situation of valve full cut-off; this sealing configuration can effectively be protected stuffing box packing to a certain extent; prevent the escape of liquid in the valve; but because the valve long-term work is under high pressure conditions; it is aging gradually that stuffing box packing is subjected to the compressing meeting of long-term high pressure; be replaced because of can not effectively sealing the most at last; but to stop valve working before changing; such operation is not only loaded down with trivial details, and stops valve and start valve consuming big energy.
Summary of the invention
Technical problem to be solved by this invention is the difficulty that overcomes prior art, and purpose is to provide a kind of can not stop the method that valve working just can be changed stuffing box packing.
The present invention is achieved through the following technical solutions above-mentioned purpose:
A kind of method of changing the valve seal filler is by seal ring being set being located between sealing seat on the valve rod and the valve gap, when rising valve rod, guaranteeing the sealing of valve by the sealing circle, thereby change the stuffing box packing that is in above the seal ring.
There is certain interval between described seal ring and the valve rod, makes seal ring on sealing seat, to move, guarantee the sealing of valve when valve rod tilts or be out of shape.
The upper and lower surface of described seal ring is a sealing surface, and described sealing surface is a convex surface.
Described convex surface can be preferably conical surface for curved surface, cambered surface or the conical surface.
Described seal ring can be a solid construction, also can hollow-core construction; Described seal ring can be that rigid material is made, and as metal, also can make by flexible material, as rubber, plastics etc.
Of the present inventionly be provided with seal ring between valve stem seal seat and valve gap, the inner cylindrical surface and the valve rod of sealing circle have certain clearance, can be free movable.On the valve rod upper seal support, produce sealing surface (being called the valve stem seal face), produce sealing surface (being called valve bonnet seal face) in the valve gap internal vertical in the valve rod axis wall, the upper and lower surface of described seal ring is produced the sealing surface that matches with valve bonnet seal face and valve stem seal face respectively.The sealing surface of described seal ring, valve stem seal face with matching and valve bonnet seal face all can be made the conical surface, also can make curved surfaces such as cylndrical surface, preferred version is that valve stem seal face and valve bonnet seal face are made conical surface, two sealing surfaces of seal ring are made cylndrical surface or other curved surfaces, such result is that the sealing surface of seal ring is line with valve stem seal face and valve bonnet seal face and contacts, and has better sealing effect.
Compared with prior art, the present invention has following beneficial effect:
Valve is widely used in pipe-line system; keep the pipeline operation and need a large amount of energy; wherein stopping valve and starting valve is one of source of energy loss; technological scheme provided by the invention has realized not stopping valve and has been operated in line replacing stuffing box packing, aspect energy-saving and cost-reducing very important positive role is being arranged, simultaneously; method cost provided by the invention is low; be convenient to operation and popularization, pipe-line system operating cost of the prior art declined to a great extent, but also help environmental protection.
Description of drawings
Fig. 1 and Fig. 2 are the schematic representation of prior art sealing system, and Fig. 1 is the situation of valve wide open, and Fig. 2 is the situation of valve full cut-off;
Fig. 3 and Fig. 4 are the sealing system schematic representation of the method for replacing valve seal filler of the present invention; Fig. 3 is the situation of valve wide open, and Fig. 4 is the situation of valve full cut-off.
Embodiment
As shown in Figure 3, the valve seal system comprises sealing seat 21, valve gap 3, stuffing box packing 4 or filler gland 5 on flap 1, valve rod 2, the valve rod, and stuffing box packing 4 is between filler gland 5 and the valve gap 3.And valve rod on sealing seat 21 and valve gap 3 between seal ring 6 is set, have certain interval between seal ring 6 and the valve rod 2, make seal ring 6 on sealing seat 21, to move, guarantee to tilt or the sealing of valve during distortion at valve rod 2.As shown in Figure 4, when rising valve rod 2, seal ring 6 is closely contacted with valve stem seal seat 21 tops with valve gap 3, thereby change the stuffing box packing 4 that is in seal ring 6 tops.Fall flap 1 after replacing finishes, make valve reply state shown in Figure 3.In the whole operation process, only need rise and fall flap and do not need to stop valve and start the operation of valve, not only simplify programmed sequence of operations, and reduced energy consumption.
Claims (7)
1. method of changing the valve seal filler is characterized in that when rising valve rod, guaranteeing the sealing of valve by the sealing circle, thereby changing the stuffing box packing that is in above the seal ring by seal ring being set being located between sealing seat on the valve rod and the valve gap.
2. the method for replacing valve seal filler as claimed in claim 1, the upper and lower surface that it is characterized in that described seal ring are as sealing surface, and described sealing surface is a convex surface.
3. the method for replacing valve seal filler as claimed in claim 2 is characterized in that described convex surface is curved surface, cambered surface or the conical surface.
4, according to claim 1 or 2 or 3 described replacing valve seal fillers, it is characterized in that there is certain interval between described seal ring and the valve rod, make seal ring on sealing seat, to move, guarantee to tilt or the sealing of valve during distortion at valve rod.
5. the method for replacing valve seal filler as claimed in claim 4 is characterized in that described seal ring is solid construction or hollow-core construction.
6. the method for replacing valve seal filler as claimed in claim 5 is characterized in that described seal ring is made by rigid material or flexible material is made.
7. the method for replacing valve seal filler as claimed in claim 6 is characterized in that described seal ring is metal o-ring, rubber seal or plastic seal ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102205744A CN101451626A (en) | 2008-12-30 | 2008-12-30 | Method for replacing valve sealing filler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102205744A CN101451626A (en) | 2008-12-30 | 2008-12-30 | Method for replacing valve sealing filler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101451626A true CN101451626A (en) | 2009-06-10 |
Family
ID=40734030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102205744A Pending CN101451626A (en) | 2008-12-30 | 2008-12-30 | Method for replacing valve sealing filler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101451626A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010081324A1 (en) * | 2008-12-30 | 2010-07-22 | 广东联塑科技实业有限公司 | Double seal valve structure |
| CN102032388B (en) * | 2009-09-25 | 2012-07-25 | 上海冠龙阀门机械有限公司 | Valve rod sealing structure capable of being maintained with voltage |
| CN107725795A (en) * | 2017-09-01 | 2018-02-23 | 中核核电运行管理有限公司 | PRATT large-diameter butterfly valve valve seat insert replacing options |
-
2008
- 2008-12-30 CN CNA2008102205744A patent/CN101451626A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010081324A1 (en) * | 2008-12-30 | 2010-07-22 | 广东联塑科技实业有限公司 | Double seal valve structure |
| CN102032388B (en) * | 2009-09-25 | 2012-07-25 | 上海冠龙阀门机械有限公司 | Valve rod sealing structure capable of being maintained with voltage |
| CN107725795A (en) * | 2017-09-01 | 2018-02-23 | 中核核电运行管理有限公司 | PRATT large-diameter butterfly valve valve seat insert replacing options |
| CN107725795B (en) * | 2017-09-01 | 2019-08-13 | 中核核电运行管理有限公司 | PRATT large-diameter butterfly valve valve seat insert replacing options |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| ASS | Succession or assignment of patent right |
Owner name: GUANGDONG LIANSU SCIENTIFIC AND TECHNICAL INDUSTRY Free format text: FORMER OWNER: GUANGDONG LIANSU MUNICIPAL ENGINEERING PIPELINE CO., LTD. Effective date: 20090515 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20090515 Address after: Shunde Longzhou Road, Longjiang Liansu industrial village in Guangdong city of Foshan Province Applicant after: Liansu Science & Technology Industrial Co., Ltd., Guangdong Prov. Address before: Xixi third industrial zone, Longjiang Town, Shunde District, Foshan, Guangdong Applicant before: Guangzhou Lianshuo Municipal Engineering Piping Co., Ltd. |
|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20090610 |