CN203009930U - Internal-pressure self-sealing swing type check valve - Google Patents
Internal-pressure self-sealing swing type check valve Download PDFInfo
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- CN203009930U CN203009930U CN 201220755769 CN201220755769U CN203009930U CN 203009930 U CN203009930 U CN 203009930U CN 201220755769 CN201220755769 CN 201220755769 CN 201220755769 U CN201220755769 U CN 201220755769U CN 203009930 U CN203009930 U CN 203009930U
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Abstract
The utility model relates to an internal-pressure self-sealing swing type check valve, and relates to a check valve. A valve body is formed by welding an upper valve body and a lower valve body; a limit device is arranged on the inner wall of the valve body; a valve cover is connected with a cover board through a screw stud and a hexagon nut; a suspension loop is arranged at the central position of the cover board; a bracket is connected with the valve cover through a screw nail; a rocker arm is connected with the bracket through a bearing pin; valve clacks are connected with the rocker arm through a bolt and a nut; a valve base is welded on the valve body; Stellite hard alloy is welded on the sealing surface of the valve base and the sealing surface of the valve clacks; and a middle flange seal ring consists of two rings with inclined surfaces.
Description
Technical field
The utility model relates to a kind of safety check, and particularly a kind of internal-pressure self-sealing Swing check valve, be used for stoping medium to flow backwards, and is applicable to the industries such as petrochemical industry, bio-pharmaceuticals, mine metallurgy.
Background technique
Since China's reform and opening-up, the national economy rapid growth, " scientific and technical innovation, autonomous innovation " become the main flow of domestic industry development.China's industry is just step by step to the future development of intensive style, energy-saving and emission-reduction, low-carbon (LC).Safety check claims again one-way valve or check valve, and its effect is to prevent that the medium in pipeline from flowing backwards.The flap of safety check is opened under the pressure medium effect, and medium flows to outlet side from suction side.During lower than outlet side, flap autoshutdown under the factor effects such as medium differential pressure, gravity own flows backwards to prevent medium when suction side pressure.Usually is connected between valve body and valve gap and all adopts gasket seal and bolt, nut connection, the sealing at this place is fully by the bolt compress gasket, bolt is giving meeting generation creep, fatigue under tight use for a long time, when can making screw bolt and nut, pipeline medium temperature variation, pressure variation occur to become flexible, can not selfsealings, between valve body and valve gap, sealing effect is relatively poor, and medium is easy to from here to external leakage.And flap revolves guide-localization weak effect when opening and closing, easily frustrates the position, causes poorly sealedly, easily causes dielectric leakage, and valve is short working life, changes frequent.The technician of R﹠D institution and enterprise is constantly exploring, is studying, and wishes to develop a kind of safety check of superior performance, although make some progress, still exists the technical barrier that not yet overcomes in practice.
Summary of the invention
The purpose of this utility model is to overcome above deficiency, and a kind of internal-pressure self-sealing Swing check valve is provided, and adopts self-pressure-sealed valve gap, good sealing effect, lightweight, save material.
the technological scheme that its technical problem that solves the utility model adopts is: contain valve body, valve seat, bolt, nut, limit stoper, flap, rocking bar, bearing pin, valve gap, double-screw bolt, cover plate, hexagon nut, screw, suspension ring, support, valve body is welded by upper valve body and lower valve body, valve interior wall is provided with limit stoper, valve gap passes through double-screw bolt, hexagon nut is connected with cover plate, the cover plate central position is provided with suspension ring, support is connected with valve gap by screw, rocking bar is connected with support by bearing pin, flap passes through bolt, nut is connected with rocking bar, valve seat is welded on valve body, sealing surface of seat and valve clack sealing surface built-up welding Si Taili cemented carbide, middle flange seal ring is comprised of two circles with the inclined-plane.
The know-why that its technical problem that solves the utility model adopts is: safety check claims again one-way valve or check valve, and its effect is to prevent that the medium in pipeline from flowing backwards.The flap of safety check is opened under the pressure medium effect, and medium flows to outlet side from suction side.During lower than outlet side, flap autoshutdown under the factor effects such as medium differential pressure and gravity own flows backwards to prevent medium when suction side pressure.Rocking bar is connected with support by bearing pin, and flap is connected with rocking bar by bolt, nut, reaches and revolves the purpose that opens.Valve seat is welded on valve body, sealing surface of seat and valve clack sealing surface built-up welding Si Taili cemented carbide, and through carefully grinding, make good seal when closing, guarantee that valve is wear-resisting, resistance to erosion, corrosion resisting property, middle flange seal ring is comprised of two circles with the inclined-plane, flange seal in guaranteeing.Bearing pin adopts stainless steel to be made, and bearing pin is connected in valve body, and medium is unlikely from the outside seepage of bearing pin.Check valve design has suspension ring, convenient lifting.Limit stoper is used for preventing that the flap open position is too high and can't close.When media flow, the active force of medium promote flap centered by bearing pin to valve body one sideway swivel, valve open, when the flowing velocity of medium increases or reduces, flap will be regulated angle of swing automatically, when medium stopped flowing, flap resetted, valve closing.
The beneficial effects of the utility model are: adopt self-pressure-sealed valve gap, good sealing effect, lightweight, save material.Sealing surface of seat and valve clack sealing surface built-up welding Si Taili cemented carbide, and through carefully grinding, make good seal when closing guarantee that valve is wear-resisting, resistance to erosion, corrosion resisting property.
Description of drawings
The below is further described the utility model in conjunction with the accompanying drawings and embodiments:
It is internal-pressure self-sealing Swing check valve structural representation in figure.
In the drawings, 1 valve body, 2 valve seats, 3 bolts, 4 nuts, 5 limit stoper, 6 flaps, 7 rocking bars, 8 bearing pins, 9 valve gaps, 10 double-screw bolts, 11 cover plates, 12 hexagon nuts, 13 screws, 14 suspension ring, 15 supports.
Embodiment
In the drawings, valve body 1 is welded by upper valve body and lower valve body, valve body 1 inwall is provided with limit stoper 5, valve gap 9 is connected with cover plate 11 by double-screw bolt 10, hexagon nut 12, cover plate 11 central positions are provided with suspension ring 14, support 15 is connected with valve gap 9 by screw 13, rocking bar 7 is connected with support 15 by bearing pin 8, flap 6 is connected with rocking bar 7 by bolt 3, nut 4, valve seat 2 is welded on valve body 1, valve seat 2 sealing surfaces and flap 6 sealing surface weld deposit Si Taili cemented carbide, middle flange seal ring is comprised of two circles with the inclined-plane.
Safety check claims again one-way valve or check valve, and its effect is to prevent that the medium in pipeline from flowing backwards.The flap 6 of safety check is opened under the pressure medium effect, and medium flows to outlet side from suction side.During lower than outlet side, flap 6 autoshutdown under the factor effects such as medium differential pressure and gravity own flows backwards to prevent medium when suction side pressure.Rocking bar 7 is connected with support 15 by bearing pin 8, and flap 6 is connected with rocking bar 7 by bolt 3, nut 4, reaches and revolves the purpose that opens.Valve seat 2 is welded on valve body 1, valve seat 2 sealing surfaces and flap 6 sealing surface weld deposit Si Taili cemented carbide, and through carefully grinding, make good seal when closing, guarantee that valve is wear-resisting, resistance to erosion, corrosion resisting property, middle flange seal ring is comprised of two circles with the inclined-plane, flange seal in guaranteeing.Bearing pin 8 adopts stainless steel to be made, and bearing pin 8 is connected in valve body 1, and medium is unlikely from the outside seepage of bearing pin 8.Check valve design has suspension ring 14, convenient lifting.Limit stoper 5 is used for preventing that flap 6 open positions are too high and can't close.When media flow, the active force of medium promote flap 6 centered by bearing pin 8 to valve body 1 one sideway swivels, valve open, when the flowing velocity of medium increases or reduces, flap 6 will be regulated angle of swing automatically, when medium stops flowing, flap 6 resets, valve closing.
Claims (1)
1. internal-pressure self-sealing Swing check valve, contain valve body, valve seat, bolt, nut, limit stoper, flap, rocking bar, bearing pin, valve gap, double-screw bolt, cover plate, hexagon nut, screw, suspension ring, support, it is characterized in that: valve body is welded by upper valve body and lower valve body, valve interior wall is provided with limit stoper, valve gap passes through double-screw bolt, hexagon nut is connected with cover plate, the cover plate central position is provided with suspension ring, support is connected with valve gap by screw, rocking bar is connected with support by bearing pin, flap passes through bolt, nut is connected with rocking bar, valve seat is welded on valve body, sealing surface of seat and valve clack sealing surface built-up welding Si Taili cemented carbide, middle flange seal ring is comprised of two circles with the inclined-plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220755769 CN203009930U (en) | 2012-12-30 | 2012-12-30 | Internal-pressure self-sealing swing type check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220755769 CN203009930U (en) | 2012-12-30 | 2012-12-30 | Internal-pressure self-sealing swing type check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203009930U true CN203009930U (en) | 2013-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220755769 Expired - Fee Related CN203009930U (en) | 2012-12-30 | 2012-12-30 | Internal-pressure self-sealing swing type check valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN203009930U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104197051A (en) * | 2014-09-26 | 2014-12-10 | 上海沪东造船阀门有限公司 | Ultralow temperature flange-type stainless steel swing check valve for liquefied natural gas ship |
| CN104534128A (en) * | 2015-02-04 | 2015-04-22 | 上海沪东造船阀门有限公司 | Super-low-temperature spiral opening type check valve for liquefied natural gas carrier |
| CN107202184A (en) * | 2017-07-13 | 2017-09-26 | 辽宁飞鸿达蒸汽节能设备有限公司 | Check-valves is opened in piston type rotation |
-
2012
- 2012-12-30 CN CN 201220755769 patent/CN203009930U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104197051A (en) * | 2014-09-26 | 2014-12-10 | 上海沪东造船阀门有限公司 | Ultralow temperature flange-type stainless steel swing check valve for liquefied natural gas ship |
| CN104534128A (en) * | 2015-02-04 | 2015-04-22 | 上海沪东造船阀门有限公司 | Super-low-temperature spiral opening type check valve for liquefied natural gas carrier |
| CN107202184A (en) * | 2017-07-13 | 2017-09-26 | 辽宁飞鸿达蒸汽节能设备有限公司 | Check-valves is opened in piston type rotation |
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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: 20130619 Termination date: 20151230 |
|
| EXPY | Termination of patent right or utility model |