CN204187115U - High temperature high pressure valve packing seal structure - Google Patents
High temperature high pressure valve packing seal structure Download PDFInfo
- Publication number
- CN204187115U CN204187115U CN201420637322.2U CN201420637322U CN204187115U CN 204187115 U CN204187115 U CN 204187115U CN 201420637322 U CN201420637322 U CN 201420637322U CN 204187115 U CN204187115 U CN 204187115U
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- Prior art keywords
- packing
- gland
- filler
- seal structure
- high temperature
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- Expired - Fee Related
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Abstract
This patent belongs to the valve technology field with stuffing box, high temperature high pressure valve packing seal structure, comprise the Gland of closed valve gap packing cavity upper end-hole, the inwall of Gland has sealed groove, O RunddichtringO is installed in sealing groove, it is characterized in that, bottom packing cavity, be provided with heelpiece, between Gland and heelpiece, be provided with dipping filler combination; This filler combination comprises braided packing, and this braided packing is provided with tetrafluoro filler and spacer ring; Arrange the cooling water flow conduits being centered around filler combination outside in described valve gap, this patent corrosion resistance is high and sealing stability is higher.
Description
Technical field
The utility model belongs to the valve technology field with stuffing box.
Background technique
In the medium channel system of High Temperature High Pressure, be under the high pressure of the high temperature of more than 350 ° and more than 20Mpa to high-temperature high pressure valve minimum requirements, ensure inside and outside No leakage, can in trouble-free continuous operation.High temperature high pressure valve generally comprises valve seat, valve gap, spool and valve rod, valve seat and valve gap are connected to form the chamber holding spool, valve rod outer termination power mechanism, valve rod the inner is run through valve gap and is connected with spool, and valve rod band movable valve plug moves up and down and valve is opened and closed gradually.
Valve rod leaks to not make the medium in valve body, and the valve rod in being kept in motion needs to carry out motive sealing with valve gap.The sealing of valve rod adopts the form of stuffing box usually.Existing stuffing box is generally gland type, and comprise Gland, swing bolt, Packing seat, Gland is connected by swing bolt with valve gap, and the filler directly contacted with valve rod is filled in the valve gap packing cavity inside below Gland.
The shortcoming of such scheme is: 1. in high-temperature high-pressure medium channel system, valve rod and valve gap are subject to the heat trnasfer of high temperature media, filler is vulnerable to the impact of high temperature, deform or chemical reaction, the final sealing stability affected between valve gap and valve rod, medium is easily leaked to valve gap outside along valve rod; 2. if corrosivity gas-liquid passes in high-temperature and pressure pipeline system, easily corrosion filler and valve rod, finally affects the sealability of valve body, causes fugacity to reveal.
Model utility content
The utility model is intended to provide a kind of corrosion resistance high and seals the higher high temperature high pressure valve packing seal structure of stability.
High temperature high pressure valve packing seal structure in this programme, comprise the Gland of closed valve gap packing cavity upper end-hole, the inwall of Gland has sealed groove, O RunddichtringO is installed in sealing groove, it is characterized in that, be provided with heelpiece bottom packing cavity, between Gland and heelpiece, be provided with filler combination; This filler combination comprises dipping braided packing, and this braided packing is provided with tetrafluoro filler and spacer ring; The cooling water flow conduits being centered around filler combination outside is set in described valve gap.
The beneficial effects of the utility model: be provided with O RunddichtringO on the inwall of Gland, about serving good sealing, prevent valve rod from movement process, taking medium to Gland place and reveal between valve rod and Gland; In addition, the filler combination arranged between Gland and lower liner, braided packing after dipping can prevent the leakage that between knitted material, interfacial gap communication channel causes, and can also reduce the friction of valve rod, and some media that valve rod can be brought into by spacer ring are collected; And mordant medium is with for some, spacer ring can also divide equally the axial pressure of Gland, guarantee the uniform force of filler combination, tetrafluoro filler has good corrosion resistance, can prevent from causing packing seal to occur the situation that fugacity is revealed because of corrosion; Finally, because this filler combination structure is generally used in high-temperature and pressure pipeline valve, the cooling water flow conduits being centered around filler combination outside is set in valve gap, fast cooling can be carried out to filler combination and valve rod, prevent from, because the filler that high temperature causes is out of shape and chemical reaction, ensure that gland sealed sealing stability.
Further, braided packing is the braided packing of carbon fibre dipping teflon, again improves the corrosion resistance of filler combination.
Further, valve gap is the outer wall that filler combination is corresponding has radiating fin, makes the heat radiation of valve rod and filler combination faster.
Further, the cross section of tetrafluoro filler is V-arrangement, and the tetrafluoro filler of V-arrangement has certain elasticity, can compress valve rod from radial direction, makes valve rod in movement process, have good motive sealing.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model high temperature high pressure valve packing seal structure embodiment.
Embodiment
Below by embodiment, the utility model is described in further detail:
Reference character in Figure of description 1 comprises: the braided packing/braided packing of 1-Gland, 2-O RunddichtringO, 3-heelpiece, 4-carbon fibre dipping teflon, 5-spacer ring, 6-V shape tetrafluoro filler, 7-cooling water flow conduits, 8-fan hot fin, 9-valve gap, 10-valve rod.
Embodiment is substantially as shown in Figure 1: high temperature high pressure valve packing seal structure, is positioned at the packing cavity of valve gap 9, and valve rod 10 axially runs through this packing cavity.High temperature high pressure valve packing seal structure in the present embodiment, comprise Gland 1, Gland 1 is positioned at the upper end-hole of packing cavity and this upper end-hole is closed, Gland 1 only leaves the valve rod hole moved for valve rod 10, the valve rod hole inwall of Gland 1 opens Packed groove, loads O RunddichtringO 2 in this groove.
At the bottom of packing cavity chamber, heelpiece 3 is installed, between Gland 1 and heelpiece 3, be filled with carbon fibre flood teflon braided packing 4(hereinafter referred to as braided packing 4), spacer ring 5 is installed in braided packing 4, braided packing 4 is divided into epimere and hypomere, the tetrafluoro filler that cross section is V-arrangement is installed in the epimere of braided packing 4, because whole packing seal structure loads from the upper end of valve rod 10, therefore by the opening surface of V-arrangement tetrafluoro filler 6 down, when making packing seal structure load valve rod 10, V-arrangement tetrafluoro filler 6 and valve rod 10 rub and its V angle are opened completely, V-arrangement tetrafluoro filler 6 and braided packing 4 fit tightly, prevent their axis from occurring space, braided packing 4, V-arrangement tetrafluoro filler 6 and spacer ring 5 entirety are called filler combination.
Valve gap 9 has cooling water flow conduits 7 in the periphery of packing cavity, the external cooling water circulating device of this cooling water flow conduits 7, during flow of cooling water, lowers the temperature to whole valve gap 9, because cooling water flow conduits 7 and packing cavity are separated by comparatively near, cooling water also can cool filler combination and valve rod 10.In order to strengthen cooling-down effect further, valve gap 9 welds the hot fin 8 of some fans on the corresponding section outer wall of filler combination.
Above-described is only embodiment of the present utility model, and in scheme, the general knowledge such as known concrete structure and characteristic does not do too much description at this.Should be understood that; for a person skilled in the art, under the prerequisite not departing from the utility model structure, some distortion and improvement can also be made; these also should be considered as protection domain of the present utility model, and these all can not affect effect and the practical applicability of the utility model enforcement.The protection domain that this application claims should be as the criterion with the content of its claim, and the embodiment in specification etc. record the content that may be used for explaining claim.
Claims (4)
1. high temperature high pressure valve packing seal structure, comprise the Gland of closed valve gap packing cavity upper end-hole, the inwall of Gland has sealed groove, O RunddichtringO is installed in sealing groove, it is characterized in that, be provided with heelpiece bottom packing cavity, between Gland and heelpiece, be provided with filler combination; This filler combination comprises dipping braided packing, and this braided packing is provided with tetrafluoro filler and spacer ring; The cooling water flow conduits being centered around filler combination outside is set in described valve gap.
2. high temperature high pressure valve packing seal structure according to claim 1, is characterized in that: described braided packing is the braided packing of carbon fibre dipping teflon.
3. high temperature high pressure valve packing seal structure according to claim 2, is characterized in that: described valve gap is the outer wall that filler combination is corresponding has radiating fin.
4. high temperature high pressure valve packing seal structure according to claim 2, is characterized in that: the cross section of described tetrafluoro filler is V-arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420637322.2U CN204187115U (en) | 2014-10-30 | 2014-10-30 | High temperature high pressure valve packing seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420637322.2U CN204187115U (en) | 2014-10-30 | 2014-10-30 | High temperature high pressure valve packing seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204187115U true CN204187115U (en) | 2015-03-04 |
Family
ID=52619117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420637322.2U Expired - Fee Related CN204187115U (en) | 2014-10-30 | 2014-10-30 | High temperature high pressure valve packing seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204187115U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112815128A (en) * | 2020-12-30 | 2021-05-18 | 东方电气集团东方汽轮机有限公司 | Integrated main steam regulating valve and regulating device |
-
2014
- 2014-10-30 CN CN201420637322.2U patent/CN204187115U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112815128A (en) * | 2020-12-30 | 2021-05-18 | 东方电气集团东方汽轮机有限公司 | Integrated main steam regulating valve and regulating device |
| CN112815128B (en) * | 2020-12-30 | 2022-05-10 | 东方电气集团东方汽轮机有限公司 | Integrated main steam regulating valve and regulating device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150304 Termination date: 20151030 |
|
| EXPY | Termination of patent right or utility model |