CN1022642C - Back-pressure angle-changeable welded check valve - Google Patents
Back-pressure angle-changeable welded check valve Download PDFInfo
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- CN1022642C CN1022642C CN 91108433 CN91108433A CN1022642C CN 1022642 C CN1022642 C CN 1022642C CN 91108433 CN91108433 CN 91108433 CN 91108433 A CN91108433 A CN 91108433A CN 1022642 C CN1022642 C CN 1022642C
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- 230000005484 gravity Effects 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 76
- 229910052742 iron Inorganic materials 0.000 claims description 38
- 230000008676 import Effects 0.000 claims description 19
- 230000008859 change Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 23
- 230000009471 action Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 2
- 239000003208 petroleum Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 7
- 238000010992 reflux Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
The present invention provides an angle-changeable back-pressure type weld check valve which can be widely used for electromechanical industry, light industry, chemical industry, petroleum industry, etc. and can perform unidirectional startstop functions in a technological pipeline. The center line of a valve body keeps an inclination angle with the horizontal direction. When fluid flows in a reverse direction, a valve clack of a valve body can close the valve by gravity and backpressure. The directions of openings of an inlet and an outlet of the valve can be changed with an angle of 360 degrees along the end surfaces of an inlet connecting pipe and an outlet connecting pipe by an inlet angle pipe and an outlet angle pipe; meanwhile, the direction of an opening of the outlet connecting pipe can be changed with an angle of 360 degrees along the centre line of the valve body. When the valve is installed, the valve can be transversely arranged, longitudinally arranged and obliquely arranged. The action of a valve clack is flexible and reliable, the angles of the inlet and the outlet can be optionally selected; thus, the working needs can be satisfied and the expenses can be saved. The present invention has the advantages of simple structure, easy manufacture, light weight and low manufacturing cost, and can be manufactured by medium and low-pressure valve stations.
Description
The present invention relates to the safety check used on a kind of process pipe, is the unidirectional opening/shutting valve that prevents the fluid countercurrent current in pipeline or the equipment.It relates to industrial fields such as electromechanics, chemical industry, light industry, oil.
The safety check in present above-mentioned field is mainly the safety check class in the China Machine Press 85 years version " valve products sample ", and using maximum is the mesolow valve, and its relies on the action of gravity action of flap in valve body, makes flow channels unimpeded or cut off.Fig. 1 is national approved product H41H-16 type Lift check valve, and fluid enters valve body 1 by import 5, and flap 2 rises by hydrodynamic pressure, and path is opened, and fluid is flowed out by outlet 6.When import 5 places dynamic pressure was zero, fluid was exported the back pressure effect of 6 places and is produced adverse current, and this moment, flap 2 dependence self gravitations declines covered valve port, and path cuts off.Weighing apparatus presses hole 4 to play flap 2 internal and external pressure balance effects, so that lifting.This Lift check valve import and export angle have only 180 ° a kind of, and must level install, in pipeline and the intensive places of equipment such as pumping station, hot and cold power stations,, need the increase piping attachment and take up space more or take up an area of sometimes for satisfying the installation requirement of safety check.The flap vertical lifting overcomes its gravity by hydrodynamic pressure, and it is little to cross fluid space, and the fluid zig zag is many, and resistance is bigger.Fluid countercurrent current speed, by the magnitude of back pressure decision, when back pressure was excessive, flap was subjected to the influence of fluid impulse force and can not descends smoothly sometimes, and the boiler feed pump outlet port polyphone that has is adorned two safety check and is had an accident in order to prevent that safety check is malfunctioning exactly.Valve body is generally cast iron, and high pressure valve has cast steel system, and weight is big, the cost height.The maximum caliber of Lift check valve is Dg150～Dg200, need select Swing check valve for use when caliber is big again.
The objective of the invention is to overcome above-mentioned shortcoming, design a kind of safe and reliable, flexible for installation, in light weight, the safety check that cost is low.
A kind of back-pressure angle-changeable formula safety check, it comprises entrance sleeve, import bend pipe, suction flange, discharge connection, outlet bend pipe, outlet(discharge) flange, valve body, valve seat, flap, flap bar, valve petal shelf, goes up slide opening iron, following slide opening iron, flange and blind flange, bleed valve, it is characterized in that valve seat is connected valve body lower portion, flange is connected valve body top, entrance sleeve is connected with valve seat, discharge connection is connected with body wall, and its center line and valve body center line keep 90 degree angles.Flange is connected with blind flange, and flap is connected with the flap bar, and valve petal shelf is connected with blind flange, and last slide opening iron is connected the valve petal shelf upside near root, and following slide opening iron is connected the valve petal shelf downside near terminal.In valve body, the flap bar passes from the slide opening of following slide opening iron and last slide opening iron successively, and the slide opening diameter is greater than the flap shank diameter.When flap moves to peak in valve body, flap bar end pushes up on the blind flange, the position of flap this moment in valve body is the downside that is in body wall discharge connection interface, when flap slides to minimum point under in valve body, flap covers on valve seat, this moment, the end of flap bar still was through in the slide opening of slide opening iron, and the flap sealing surface can adopt plane or sphere form.
When the line of entrance sleeve center line end points and discharge connection center line end points is a horizontal line, valve body center line and level keep an inclination angle, bleed valve is connected on the last eccentric position of blind flange, this moment entrance sleeve, valve seat, valve body, flap, the flap bar, the same center line of blind flange, in order to overcome the flap bar that is through in slide opening iron and the following slide opening iron slide opening disalignment because of the unbalance generation of gravity, to go up inclined to one side △ x amount under the slide opening iron slide opening center, as pressure point, to descend in the slide opening iron slide opening in the heart partially △ x amount as fulcrum, the position of body wall discharge connection can be done 360 degree along the valve body center line and be changed, and the opening direction of the bend pipe of import simultaneously can be done 360 degree along the entrance sleeve end face with import bend pipe end face and change; The also available outlet bend pipe of the opening direction end face of outlet bend pipe is made 360 degree along the discharge connection end face and is changed, and the inlet/outlet bend pipe connects with adopting welding or flange being connected of inlet/outlet adapter.
When valve when valve body center line and horizontal vertical are used, entrance sleeve and valve seat, valve body, flap, flap bar, go up slide opening iron, time slide opening iron, the same center line of blind flange, bleed valve is installed on the blind flange.
Action principle of the present invention is: when valve body center line and level keep an inclination angle, fluid enters valve body by inlet tube, and flap is subjected to move in the fluid pressure action inclination, and path is opened, fluid passes the space between valve body and flap, is the state that confluxes at the flap back and is flowed out by outer pipe.Fluid overcomes that the flap inclined gravity is littler than vertical gravity, and it is big that it crosses fluid space, and overall drag is little.When valve inlet pipe kinetic pressure is zero, fluid is refluxed by outer pipe by the return pressure effect, at this moment, flap is except that being subjected to self gravitation effect downslide, the flap back also will be subjected to the pressure effect of fluid reflux, makes the two sides of flap produce big pressure reduction, promotes flap and glides, cover valve seat, cross circulation flow path and cut off.The fluid reflux back pressure is bigger, and the flap gliding speed is faster.The discharge connection position that body wall connects can be made 360 degree along the valve body center line and change, be typically chosen in upside, downside, left side or the right side of valve body, simultaneously, the opening direction of import bend pipe can be made 360 degree along the entrance sleeve end face with import bend pipe end face and change, and generally selects downwards, left, to the right or level; The also available outlet bend pipe of the opening direction end face of outlet bend pipe is done 360 degree along the discharge connection end face and is changed, generally select left, to the right, level or vertical.The setting angle of inlet/outlet pipe generally can have tens kinds of combining forms.Inlet tube is made of successively entrance sleeve, import bend pipe, suction flange; Outer pipe is made of successively discharge connection, outlet bend pipe, outlet(discharge) flange.
When valve body center line and horizontal vertical, it is exactly an angle check valve, and the non-return action principle is identical when tilting with reliability and valve body, and just resistance wants big because of overcoming the flap vertical gravity, and import bend pipe and outlet bend pipe can be cancelled.
The present invention adopts said structure, and the flap flexible movements are reliable, and the inlet/outlet angle chooses at random, and more can satisfy requirement of engineering and save engineering cost; It is simple in structure, and is easy to manufacture, applied widely, in the various calibers, Low pressure valve all can make.
Below in conjunction with accompanying drawing, the invention will be further described:
Fig. 1: national approved product H41H-16 type safety check sectional drawing.
Fig. 2: the embodiment of the invention one sectional drawing.
Fig. 3: the embodiment of the invention two sectional drawings.
Wherein: 1. valve body.2, flap.3, valve gap.4, weighing apparatus is pressed the hole.5, import.6, outlet.7, entrance sleeve.8, import bend pipe.9, suction flange.10, valve seat.11, valve body.12, flange.13, blind flange.14, bleed valve.15, discharge connection.16, outlet bend pipe.17, outlet(discharge) flange.18, valve petal shelf.19, go up slide opening iron.20, following slide opening iron.21, flap bar.22, flap.23, entrance sleeve.24, import bend pipe.25, suction flange.26, valve seat.27, valve body.28, flange.29, blind flange.30, bleed valve.31, discharge connection.32, outlet bend pipe.33, outlet(discharge) flange.34, valve petal shelf.35, go up slide opening iron.36, following slide opening iron.37, flap bar.38, flap.
Embodiment one:
As shown in Figure 2, valve body 11 keeps an inclination angle with level, entrance sleeve 7 is communicated with valve seat 10, discharge connection 16 is communicated with valve body 11 sidewalls, valve body 11 bottoms are connected with valve seat 10, top is connected with flange 12, blind flange 13 is connected on the flange 12, and bleed valve 14 is connected on the last eccentric position of blind flange 13 in order to exhaust, and flap 22 is connected with flap bar 21, valve petal shelf 18 is connected with blind flange 13, last slide opening iron 19 is connected the top of valve petal shelf 18, and following slide opening iron 20 is connected the bottom of valve petal shelf 18, in valve body 11, flap bar 21 passes from the slide opening of following slide opening iron 20 and last slide opening iron 19 successively, can go up, under be free to slide.When fluid when inlet tube is come in, promote to move on the flaps 22 through valve seat 10, path is opened, fluid passes from the space between valve body 11 and the flap 22, confluxes and flows out from outer pipe.When the inlet tube dynamic pressure was zero, the flap 22 in the valve body 11 was glided by self gravitation and two kinds of power effects of back fluid reflux pressure, covers valve seat 10, and path cuts off, and stoped and refluxed.Inlet tube is made of successively entrance sleeve 7, import bend pipe 8, suction flange 9; Outer pipe discharge connection 15, outlet bend pipe 16, outlet(discharge) flange 17 are formed successively.This example is cleared for putting down into, inlet/outlet angle 180 degree.
Embodiment two:
As shown in Figure 3, valve body 27 keeps an inclination angle with level, entrance sleeve 23 is communicated with valve seat 26, discharge connection 31 is communicated with valve body 27 sidewalls, valve body 27 bottoms are connected with valve seat 26, top is connected with flange 28, blind flange 29 is connected on the flange 28, bleed valve 30 is connected on the last eccentric position of blind flange 29 in order to exhaust, flap 38 is connected with flap bar 37, valve petal shelf 34 is connected with blind flange 29, and last slide opening iron 35 is connected the top of valve petal shelf 34, and following slide opening iron 36 is connected the bottom of valve petal shelf 34.In valve body 27, flap bar 37 passes from the slide opening of following slide opening iron 36 and last slide opening iron 35 successively, can upper and lowerly be free to slide.When fluid when inlet tube is come in, promote to move on the flaps 38 through valve seat 26, path is opened, fluid passes from the space between valve body 27 and the flap 38, confluxes and flows out from outer pipe.When the inlet tube dynamic pressure was zero, the flap 38 in the valve body 27 was glided by self gravitation and two kinds of power effects of back fluid reflux pressure, covers valve seat 26, and path cuts off, and stoped and refluxed.Inlet tube is made of successively entrance sleeve 23, import bend pipe 24, suction flange 25; Outer pipe is made of successively discharge connection 31, outlet bend pipe 32, outlet(discharge) flange 33.This example goes out on advancing down, inlet/outlet angle 180 is spent.
Claims (4)
1, a kind of back-pressure angle-changeable formula safety check, it comprises entrance sleeve, the import bend pipe, suction flange, discharge connection, the outlet bend pipe, outlet(discharge) flange, valve body, valve seat, flap, the flap bar, valve petal shelf, last slide opening iron, following slide opening iron, flange and blind flange, bleed valve, it is characterized in that valve seat is connected valve body lower portion, flange is connected valve body top, entrance sleeve is connected with valve seat, discharge connection is connected with body wall, its center line and valve body center line keep 90 degree angles, flange is connected with blind flange, flap is connected with the flap bar, valve petal shelf is connected with blind flange, last slide opening iron is connected the valve petal shelf upside near root, following slide opening iron is connected the valve petal shelf downside near terminal, in valve body, the flap bar passes from the slide opening of following slide opening iron and last slide opening iron successively, the slide opening diameter is greater than the flap shank diameter, when flap moves to peak in valve body, flap bar end pushes up on the blind flange, the position of flap this moment in valve body is the downside that is in body wall discharge connection interface, when flap slides to minimum point under in valve body, flap covers on valve seat, this moment, the end of flap bar still was through in the slide opening of slide opening iron, and the sealing surface of flap can adopt plane or sphere form.
2, back-pressure angle-changeable formula safety check according to claim 1, when the line that it is characterized in that entrance sleeve center line end points and discharge connection center line end points is a horizontal line, valve body center line and level keep an inclination angle, bleed valve is connected on the last eccentric position of blind flange, this moment entrance sleeve, valve seat, valve body, flap, the flap bar, the same center line of blind flange, in order to overcome the flap bar that is through in slide opening iron and the following slide opening iron slide opening disalignment because of the unbalance generation of gravity, to go up inclined to one side △ x amount under the slide opening iron slide opening center, as pressure point, to descend inclined to one side in the heart △ x amount in the slide opening iron slide opening, as fulcrum.
3, according to the back-pressure angle-changeable formula safety check of claim 1, it is characterized in that entrance sleeve center line and discharge connection center line angle 90 degree, valve is when valve body center line and horizontal vertical use, entrance sleeve and valve seat, valve body, flap, flap bar, last slide opening iron, following slide opening iron, the same center line of blind flange, bleed valve is connected on the blind flange.
4, according to the back-pressure angle-changeable formula safety check of claim 2, when it is characterized in that valve body center and level keep a side angle, the position of body wall discharge connection can be done 360 degree along the valve body center line and be changed, the opening direction of the bend pipe of import simultaneously can be done 360 degree along the entrance sleeve end face with import bend pipe end face and change, the also available outlet bend pipe of the opening direction end face of outlet bend pipe is done 360 degree along the discharge connection end face and is changed, and imports and exports bend pipe and connects with adopting welding or flange being connected of inlet/outlet adapter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91108433 CN1022642C (en) | 1991-11-07 | 1991-11-07 | Back-pressure angle-changeable welded check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91108433 CN1022642C (en) | 1991-11-07 | 1991-11-07 | Back-pressure angle-changeable welded check valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1060902A CN1060902A (en) | 1992-05-06 |
| CN1022642C true CN1022642C (en) | 1993-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91108433 Expired - Fee Related CN1022642C (en) | 1991-11-07 | 1991-11-07 | Back-pressure angle-changeable welded check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1022642C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1868841B (en) * | 2005-05-25 | 2013-07-24 | 陆洪瑞 | Receiving device of pneumatic conveyed article |
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1991
- 1991-11-07 CN CN 91108433 patent/CN1022642C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1060902A (en) | 1992-05-06 |
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| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |