CN203146876U - Self-sealing gate valve - Google Patents
Self-sealing gate valve Download PDFInfo
- Publication number
- CN203146876U CN203146876U CN 201320102880 CN201320102880U CN203146876U CN 203146876 U CN203146876 U CN 203146876U CN 201320102880 CN201320102880 CN 201320102880 CN 201320102880 U CN201320102880 U CN 201320102880U CN 203146876 U CN203146876 U CN 203146876U
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- valve
- sealing
- sealing ring
- circle
- self
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- Expired - Fee Related
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- Lift Valve (AREA)
Abstract
The utility model discloses a self-sealing gate valve which comprises a valve body, a flashboard, a valve rod, a valve cover and a valve rod lifting driving mechanism, wherein a valve cover embedding sleeve is arranged at an opening of the upper end of the valve body; the valve cover is embedded and fixedly arranged in the valve cover embedding sleeve; a sealing ring is arranged between the outer wall of the valve cover and the inner wall of the valve cover embedding sleeve and consists of a soft sealing ring and an elastic hard sealing ring; and the elastic hard sealing ring is arranged on the upper side of the soft sealing ring. According to the self-sealing gate valve disclosed by the utility model, a general wedged pad is changed into a wedged structure with dual sealing rings; the sealing is realized by the soft sealing ring made of flexible graphite or flexible graphite weaving material at low pressure; the sealing is realized by the elastic hard sealing ring made of austenite steel at high pressure; and the defects of a traditional self-sealing structure are made up.
Description
Technical field
The utility model relates to a kind of gate valve, particularly a kind of selfsealings gate valve.
Background technique
Gate valve is used for blocking or connecting the medium of pipeline, all plays a part very importantly in a lot of industries, and the self sealing structure that gate valve is commonly used has wedge piece combination seal (wood closure) and two kinds of structures of seal by wedge-like gasket.These two kinds of structures all are that wedge piece is placed between floating top cover and the cylindrical body end, utilize the pretightening force that pretension bolt produces and form initial specific pressure.When pressure medium is done the time spent, the floating top cover effect of being stressed is the compression wedge pad upwards, thereby reaches self-tightening sealing.The patent No. provides a kind of middle part self-tightening hard seal gate valve for 201020547562.5 Chinese utility model patent, changes valve gap and the soft seal between the valve body of traditional gate valve into hard sealing.Though hard sealing structure is more intense to the adaptability of temperature, the relative soft sealing structure of sealability is poor.
The model utility content
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, and a kind of selfsealings gate valve with the double density seal is provided.
For achieving the above object, the technical solution of the utility model is: a kind of selfsealings gate valve, comprise valve body, flashboard, valve rod, valve gap and valve rod lift drive mechanism, the valve body upper end open arranges valve gap and sets cover, the valve gap setting-in is fixed on valve gap and sets in the cover, the outer wall of valve gap and valve gap are set between the inwall of cover and are provided with seal ring, and seal ring is made up of soft seal circle and elastic hard sealing circle, and the elastic hard sealing circle is formed and is arranged on above the soft seal circle.
The material of soft seal circle is Expanded graphite or Expanded graphite braided material.
The material of elastic hard sealing circle is austenitic steel.
The beneficial effects of the utility model are: the utility model makes common wedge piece into the wedge-type structure of double density seal, realize sealing by the soft seal circle of Expanded graphite or Expanded graphite braided material during low pressure, the elastic hard sealing circle of making by austenitic steel during high pressure is realized sealing, has remedied the defective of existing self sealing structure.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is A of the present utility model portion enlarged view.
Among the figure: valve body 1, flashboard 2, valve rod 3, valve gap 4, valve rod lift drive mechanism 5, valve gap are set cover 6, seal ring 7, soft seal circle 71, hard seal ring 72.
Embodiment
Below in conjunction with accompanying drawing, and in conjunction with the embodiments, the utility model is described further.
Embodiment:
As shown in Figure 1 and Figure 2, a kind of selfsealings gate valve, comprise valve body 1, flashboard 2, valve rod 3, valve gap 4 and valve rod lift drive mechanism 5, valve body 1 upper end open arranges valve gap and sets cover 6, valve gap 4 setting-ins are fixed on valve gap and set in the cover 6, the outer wall of valve gap 4 and valve gap are set between cover 6 the inwall and are provided with seal ring 7, and seal ring 7 is made up of soft seal circle 71 and elastic hard sealing circle 72, and elastic hard sealing circle 72 compositions are arranged on above the soft seal circle 71.
The material of soft seal circle 71 is Expanded graphite or Expanded graphite braided material.
The material of elastic hard sealing circle 72 is austenitic steel.
The utility model makes common wedge piece into the wedge-type structure of double density seal, because the double-sealing coil structures has soft seal circle 71 to exist, so it is little many that the pretightening force of the pretension bolt that it is required is wanted, the initial sealing pressure ratio is less, sealing easily under the low pressure situation, can suitably reduce pretension bolt during design, reduce the valve cost.When pressure and temperature raises gradually, the stressed sealing of elastic hard sealing circle 72 beginnings, and soft seal this moment circle 71 is stressed very little, has so both guaranteed to realize under the High Temperature High Pressure situation sealing, can avoid soft seal circle 71 by conquassation again.Owing to be the sealing of soft or hard double-layer seal circle, under the situation of temperature, pressure generation fluctuation, also can realize reliable sealing.
Claims (3)
1. selfsealings gate valve, comprise valve body (1), flashboard (2), valve rod (3), valve gap (4) and valve rod lift drive mechanism (5), described valve body (1) upper end open arranges valve gap and sets cover (6), described valve gap (4) setting-in is fixed on valve gap and sets in the cover (6), the outer wall of valve gap (4) and valve gap are set between the inwall of cover (6) and are provided with seal ring (7), it is characterized in that: described seal ring (7) is made up of soft seal circle (71) and elastic hard sealing circle (72), and elastic hard sealing circle (72) composition is arranged on above the soft seal circle (71).
2. a kind of selfsealings gate valve as claimed in claim 1, it is characterized in that: the material of described soft seal circle (71) is Expanded graphite or Expanded graphite braided material.
3. a kind of selfsealings gate valve as claimed in claim 1, it is characterized in that: the material of described elastic hard sealing circle (72) is austenitic steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320102880 CN203146876U (en) | 2013-03-06 | 2013-03-06 | Self-sealing gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320102880 CN203146876U (en) | 2013-03-06 | 2013-03-06 | Self-sealing gate valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203146876U true CN203146876U (en) | 2013-08-21 |
Family
ID=48974400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320102880 Expired - Fee Related CN203146876U (en) | 2013-03-06 | 2013-03-06 | Self-sealing gate valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203146876U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899780A (en) * | 2014-03-05 | 2014-07-02 | 大丰市奥凯流体机械有限公司 | Pressure self-sealing sluice valve |
-
2013
- 2013-03-06 CN CN 201320102880 patent/CN203146876U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899780A (en) * | 2014-03-05 | 2014-07-02 | 大丰市奥凯流体机械有限公司 | Pressure self-sealing sluice valve |
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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: 20130821 Termination date: 20140306 |