CN204372315U - Corrosion resistant type packing seal structure - Google Patents
Corrosion resistant type packing seal structure Download PDFInfo
- Publication number
- CN204372315U CN204372315U CN201420636975.9U CN201420636975U CN204372315U CN 204372315 U CN204372315 U CN 204372315U CN 201420636975 U CN201420636975 U CN 201420636975U CN 204372315 U CN204372315 U CN 204372315U
- Authority
- CN
- China
- Prior art keywords
- packing
- gland
- spacer ring
- seal structure
- heelpiece
- 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.)
- Expired - Fee Related
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Abstract
This patent belongs to the valve technology field with stuffing box, corrosion resistant type packing seal structure, comprise the Gland of closed valve gap packing cavity upper end-hole, packing cavity bottom is provided with heelpiece, it is filler combination between Gland and heelpiece, be provided with the first spacer ring in this filler combination, the inwall of Gland has sealed groove, is provided with O RunddichtringO in sealing groove; Described filler combination is divided into asbestos packing and graphite packing from top to bottom, and asbestos packing and graphite packing separate by spacer ring; Nockbush and disc spring is set gradually between at the bottom of heelpiece and packing cavity chamber.The sealing of this patent and tightness be all higher, have good decay resistance and can avoid because the aging lax sealability caused of filler reduces.
Description
Technical field
The utility model belongs to the valve technology field with stuffing box.
Background technique
Valve is the controlling component in fluid delivery system, has cut-off, adjustment, water conservancy diversion, prevents the functions such as adverse current, voltage stabilizing, shunting or overflow pressure relief.Valve generally comprises valve seat, valve gap, spool and valve rod, and valve seat and valve gap are connected to form the chamber holding spool, and 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, and in the packing cavity of valve gap, load stuffing box, stuffing box is built with filler.When existing valve is for carrying toxic gas or liquid, can require higher to the sealing between valve rod and valve gap, otherwise toxic gas or liquid can be taken out of outside valve gap along with moving up and down of valve rod, befouling environment, workman time serious, can be caused poisoning.In prior art, in order to carry in the stem packing sealing configuration of the valve of toxic gas or liquid, usual employing increases filler spacer ring, for collecting the medium of leakage, but the shortcoming of this spline structure is: 1. just as preventive measure, fundamentally do not improve sealability and the tightness of valve, toxic gas or liquid still can be revealed along valve rod generation fugacity.2. filler combination bottom and valve seat are rigid contact, because filler is soft materials, can occur aging and lax, affect the sealability of valve after using the long period.
Model utility content
The utility model be intended to provide a kind of sealing and tightness all higher, there is good decay resistance and can avoid because of the aging lax sealability caused of filler reduce packing seal structure.
Corrosion resistant type packing seal structure in this programme, comprise the Gland of closed valve gap packing cavity upper end-hole, packing cavity bottom is provided with heelpiece, it is filler combination between Gland and heelpiece, the first spacer ring is provided with in this filler combination, the inwall of Gland has sealed groove, is provided with O RunddichtringO in sealing groove; Described filler combination is divided into asbestos packing and graphite packing from top to bottom, and asbestos packing and graphite packing separate by spacer ring; Nockbush and disc spring is set gradually between at the bottom of heelpiece and packing cavity chamber.
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, disc spring is provided with between at the bottom of nockbush and packing cavity chamber, Elastic Contact between making at the bottom of this packing seal structure and packing cavity, when longer in use, filler occurs lax, this disc spring can carry out elastic compensating to filler, avoids because filler relaxes, and the situation of valve leaks occurs; Nockbush passes into the cleaning medium higher than pipeline medium 0.05-0.1Mpa, and its pressure is greater than pipeline medium, can realize liquid airproof to pipeline medium, prevents corrosive liquid or gas from being brought in filler combination by valve rod; In addition, even if nockbush cannot avoid toxic gas or fluid leakage completely, filler combination all has certain corrosion resistance, absorption portion leak liquid, and in addition, spacer ring can be collected the liquid revealed or gas, finally derives and focuses on.
Further, asbestos packing is the asbestos packing of leaching tetrafluoro, can improve the corrosion resistance of filler part.
Further, in asbestos packing, set up the second spacer ring, filler combination is played to the effect of reinforcing, avoid because filler combination is long, easily make filler combination be out of shape when Gland applies pressure in filler combination, in addition, also can collect leak liquid or gas further.
Further, valve gap has first and draws small opening and second and draw small opening on the corresponding position of the first spacer ring and the second spacer ring, described first draws small opening and second draws small opening and all welds with the leak-off connection of valve gap outside, leak-off connection can external connecting negative pressure aspirator, the leak liquid of collecting in two spacer rings or gas is derived by leak-off connection.
Accompanying drawing explanation
Fig. 1 is that the structure of the utility model corrosion resistant type packing seal structure embodiment looks schematic diagram.
Embodiment
Below by embodiment, the utility model is described in further detail:
Reference character in Figure of description 1 comprises: 1-Gland, 2-O RunddichtringO, 3-soak tetrafluoro asbestos packing, 4-first spacer ring, 5-second spacer ring, 6-graphite packing, 7-heelpiece, 8-nockbush, 9-disc spring, 10-valve gap.
Embodiment is substantially as shown in Figure 1: corrosion resistant type packing seal structure, is positioned at the packing cavity of valve gap, and stem shaft is to running through this packing cavity.Corrosion resistant type 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 for stem movement, the valve rod hole inwall of Gland 1 opens Packed groove, loads O RunddichtringO 2 in this groove.
Between at the bottom of Gland 1 and packing cavity chamber, filler combination, heelpiece 7, nockbush 8 and disc spring 9 are installed successively from top to bottom.First paragraph leaching tetrafluoro asbestos packing 3, first spacer ring 4, second segment leaching tetrafluoro asbestos packing 3, second spacer ring 5, graphite packing 6 is comprised from top to bottom in filler combination, valve gap 10 with the corresponding position of the first spacer ring 4 and the second spacer ring 5 on have first and draw small opening and second and draw small opening, first the first leak-off connection drawing small opening valve gap 10 outside welds, second draws small opening all welds with the second leak-off connection of valve gap 10 outside, and first draws small opening and second draws small opening and be all connected with negative pressure pump.
In the utility model, nockbush 8 passes into the cleaning medium higher than pipeline medium 0.05-0.1Mpa, and its pressure is greater than pipeline medium, can realize liquid airproof to pipeline medium, prevents corrosive liquid or gas from being brought in filler combination by valve rod; In addition disc spring 9 make at the bottom of this packing seal structure and packing cavity between Elastic Contact, when longer in use, filler occurs lax, this disc spring 9 can carry out elastic compensating to filler, avoiding because filler relaxes, and the situation of valve leaks occurs.
Claims (4)
1. corrosion resistant type packing seal structure, comprise the Gland of closed valve gap packing cavity upper end-hole, packing cavity bottom is provided with heelpiece, it is filler combination between Gland and heelpiece, the first spacer ring is provided with in this filler combination, it is characterized in that: the inwall of Gland has sealed groove, O RunddichtringO is installed in sealing groove; Described filler combination is divided into asbestos packing and graphite packing from top to bottom, and asbestos packing and graphite packing separate by spacer ring; Nockbush and disc spring is set gradually between at the bottom of heelpiece and packing cavity chamber.
2. corrosion resistant type packing seal structure according to claim 1, is characterized in that: described asbestos packing is the asbestos packing of leaching tetrafluoro.
3. corrosion resistant type packing seal structure according to claim 1, is characterized in that: set up the second spacer ring in described asbestos packing.
4. corrosion resistant type packing seal structure according to claim 3, it is characterized in that: described valve gap has first and draws small opening and second and draw small opening on the corresponding position of the first spacer ring and the second spacer ring, described first draws small opening and second draws small opening and all welds with the leak-off connection of valve gap outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420636975.9U CN204372315U (en) | 2014-10-30 | 2014-10-30 | Corrosion resistant type packing seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420636975.9U CN204372315U (en) | 2014-10-30 | 2014-10-30 | Corrosion resistant type packing seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204372315U true CN204372315U (en) | 2015-06-03 |
Family
ID=53328536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420636975.9U Expired - Fee Related CN204372315U (en) | 2014-10-30 | 2014-10-30 | Corrosion resistant type packing seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204372315U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109555898A (en) * | 2018-12-06 | 2019-04-02 | 建湖县坤腾机械有限公司 | A kind of valve |
-
2014
- 2014-10-30 CN CN201420636975.9U patent/CN204372315U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109555898A (en) * | 2018-12-06 | 2019-04-02 | 建湖县坤腾机械有限公司 | A kind of valve |
| CN109555898B (en) * | 2018-12-06 | 2020-06-30 | 建湖县坤腾机械有限公司 | Valve gate |
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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: 20150603 Termination date: 20151030 |
|
| EXPY | Termination of patent right or utility model |