CN1098177A - Liquid (gas) hydraulic (pneumatic) slow-closure butterfly valve with normal off-axis - Google Patents
Liquid (gas) hydraulic (pneumatic) slow-closure butterfly valve with normal off-axis Download PDFInfo
- Publication number
- CN1098177A CN1098177A CN 93109379 CN93109379A CN1098177A CN 1098177 A CN1098177 A CN 1098177A CN 93109379 CN93109379 CN 93109379 CN 93109379 A CN93109379 A CN 93109379A CN 1098177 A CN1098177 A CN 1098177A
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- valve
- hydraulic cylinder
- slow
- piston
- slow close
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- Fluid-Driven Valves (AREA)
Abstract
The invention provides a kind of in the unexpected termination of pumping process of pressurized with fluid pump the positive off-axis butterfly valve of liquid (gas) control Slow Close of surge suppressing.This valve is made up of valve body, oil hydraulic cylinder, pilot valve, Slow Close plug and weight.Piston in hydraulic cylinder is by the open and close of chute control flap.Its feature is to prevent pump-stopping water hammer, also can eliminate noise effectively, and structure length is little, in light weight, and is little to the fluid coefficient of friction resistance of being carried, and obvious energy conservation is the desirable safe energy saving devices of all kinds of pipe-line for conveying liquids.
Description
The present invention relates to a kind of buffer valve, when liquid in pipeline during reverse flow, this valve realizes first quick and back slow that by pilot valve two stages closed, thereby reduces the pressure surge that the refluence water yield and pump-stopping water hammer cause effectively.The present invention be more particularly directed to a kind of off-axis butterfly flap that utilizes and realize that Slow Close is eliminated the noise and the device of pilot pressure fluctuation.
In water-carriage system, when compression pump stops suddenly, can cause the unexpected variation of water velocity in the pipeline, thereby cause pressure surge, be commonly referred to as pump-stopping water hammer.May cause the judder even the destruction of compression pump and pipeline, and produce very big Strike note.
The shortcoming of the buffer valve that has earlier is the bump sound in the time of can not preventing termination of pumping especially effectively, and physical dimension is excessive, makes the product cost too high.
The present invention is intended to keep under the key property prerequisite that the buffer valve that has earlier prevents pump-stopping water hammer, according to the hydraulic characteristic in the closed procedure of flap pass, adopt the method for butterfly positive bias flap and weight-adding hammer, making flap close resistance evenly increases, and do the Slow Close mechanism of flap with oil hydraulic cylinder, make pump-stopping water hammer controlled, bump is eliminated.Thereby it is little to obtain a kind of mistake flow resistance, and structure is short, lightweight slow closed check damper.
The positive off-axis butterfly valve of Slow Close formula of the present invention is made up of valve body, oil hydraulic cylinder, pilot-actuated valve, Slow Close plug and weight.Oil hydraulic cylinder bottom and casing wall respectively have a discharge orifice, and they are communicated with valve body by conduit, Slow Close plug, pilot valve respectively.When manifold pressure is reduced to a certain degree or water is anti-when flowing, the pilot valve action is reduced to zero with hydraulic pressure in the oil hydraulic cylinder, and leaks under the effect of piston upper springs and axial region weight, piston is moved down, flap ShiShimonoseki rapidly.When piston moved down into certain position, oil hydraulic cylinder bottom discharge orifice was closed, and the water in the cylinder body only flows beyond the Great Wall by Slow Close, and two stages of realizing are first quick and back slow closed flap, reach and eliminate noise and water hammering.
Waterpower impact noise when the positive off-axis butterfly valve of Slow Close formula of the present invention can either prevent effectively that pump-stopping water hammer from can eliminate termination of pumping again, thus a kind of perfect safety protection and noise elimination apparatus provided for water delivery (or other liquid gas).And in proper functioning, this valve resistance is very little, and more old-fashioned safety check is energy-conservation, and structure length is little, and cost is low.
Describe the concrete structure of the positive off-axis butterfly valve of Slow Close of the present invention in detail below in conjunction with accompanying drawing.
Accompanying drawing is the plan view and the right elevation of a kind of concrete structure of the present invention.
With reference to accompanying drawing, the valve body 1 that has inner seal ring 22 constitutes an airtight fluid passage, and flap 2 is hinged with valve body positive axis or off-axis by main shaft 20, and the O RunddichtringO 21 that is contained on the main shaft is hedged off from the outer world the interior current of valve body.Oil hydraulic cylinder is affixed by swash plate 23 and valve body 1, oil hydraulic cylinder 8 usefulness conduits also are communicated with valve body 1 by Slow Close plug 10 and pilot valve 3, the effect of pilot valve 3 be after water pump is opened, the oil hydraulic cylinder inner chamber is hedged off from the outer world and with valve body in be communicated with, when termination of pumping, make the emptying of oil hydraulic cylinder inner chamber pressure water, the effect of Slow Close plug 10 is the later stages of closing closed procedure at flap, by the drainage rate of water in the restriction oil hydraulic cylinder, realize Slow Close, prevent water hammer and eliminate noise.Hydraulic cylinder shell is made up of cylinder body and upper cover plate 6, lower cover plate 17, have O RunddichtringO 16 on the lower cover plate, the piston 7 of O RunddichtringO 12 is housed in the hydraulic cylinder, be connected with chute 25 by piston rod 9, chute 25 is connected with main shaft 20 by bearing pin 18, rocking bar 19, thereby the to-and-fro motion of hydraulic cylinder piston 7 and the rotation of flap are connected, and weight 27 is connected with main shaft by movement weight rod 26, and angled.The effect of Slow Close ring 14 gentle closed loop seats 15 is pod apertures of confining liquid cylinder pressure lower cover when piston is finished the quick closing valve process, and water only flows out by Slow Close ring 10 in the cylinder body thereby make.Spring 13 is when flap is opened once more Slow Close ring 14 to be resetted.The spring 11 and the weight 27 that are added on the piston 7 can make piston quicken quick closing valve.Position-limited lever 4 and back of the body cap 5 limit the maximum vertical penetration of piston 7, thereby make flap keep maximum opening, and when position-limited lever is threaded to lower limit, make this valve play bulkhead gate.
The attainable another kind of structural type of this valve is chute 8 and being connected of rocking bar 19 to be changed into by bearing pin 18 hinged, and simultaneously hydraulic cylinder can rotate around a stationary axle.When pilot valve adopts electromagnetic switch control, can cancel spring 11, bonnet 6 adopts the O RunddichtringO, be communicated with the oil hydraulic cylinder epicoele with conduit, be the attainable another kind of combining form of this valve, and this combination makes this valve except that above-mentioned functions, also have the effect of operated valve.But these two kinds of structural types all within the scope of the present invention.
This valve is mainly used in water drainage-supply system, also can use on other non-corrosive liquid of conveying and gas pipeline.
Claims (5)
1, the positive off-axis butterfly valve of liquid (gas) control Slow Close a kind of by valve body 1, flap 2, oil hydraulic cylinder 8, chute 25 and conduit 14, that pilot valve 3 is formed.It is characterized in that: flap by main shaft 20 positive axis or off-axis be hinged on the valve body 1, oil hydraulic cylinder 8 is loaded on valve body one side, oil hydraulic cylinder 8 inner carriers 7 make the rotation of flap 2 be subjected to the control of piston 7 by piston rod 9, chute 25 (also can be hinged), bearing pin 18, rocking bar 19, main shaft 20, and oil hydraulic cylinder 8 is connected with valve body by conduit 24, pilot valve 3, Slow Close plug 10 makes piston 7 realize controlled or two stage ShiShimonoseki first quick and back slow automatically.
2, control the positive off-axis butterfly valve of Slow Close by the liquid (gas) of claim 1 regulation, it is characterized in that: to move down be to realize like this to piston in hydraulic cylinder 7 two stages first quick and back slow when having a power failure suddenly, when pipeline inner fluid reverse flow, at first cause the pilot valve action, thereby make conduit 24 and valve body partition and lead directly to atmosphere, water outflows rapidly in the cylinder body, and piston 7 moves down fast; When Slow Close ring 14 was pressed on the Slow Close ring seat 15, current only leaked by Slow Close plug 10 in the cylinder body, thereby piston 7 is moved down at a slow speed.
3, by the positive off-axis butterfly valve of liquid (gas) control Slow Close of claim 1 regulation, it is characterized in that: pilot valve 3 can make conduit 24, oil hydraulic cylinder 8 piston lower lumen be communicated with valve body when valve body inner fluid positive movement, with atmospheric isolation, and not electricity consumption; When valve body inner fluid reverse flow, can be automatically that conduit 24 and oil hydraulic cylinder inner chamber and atmosphere is straight-through, medium leaks, and body cavity and conduit 24 are completely cut off;
4, by the positive off-axis butterfly valve of liquid (gas) control Slow Close of claim 1 regulation, it is characterized in that: only electricity consumption in 3～10 minutes before and after this valve normally opens and closes of pilot valve 3, and in the normal electricity consumption that need not in service.
5, control the positive off-axis butterfly valve of Slow Close by the liquid (gas) of claim 1 regulation, it is characterized in that: rocking bar 19 and flap 2 are 20～70 degree by main shaft 20 angle that is connected, optimum angle is 45 °, and when piston rod 9 adopted articulated manner with rocking bar 19, this angular range can expand 0～90 ° to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93109379 CN1098177A (en) | 1993-07-29 | 1993-07-29 | Liquid (gas) hydraulic (pneumatic) slow-closure butterfly valve with normal off-axis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93109379 CN1098177A (en) | 1993-07-29 | 1993-07-29 | Liquid (gas) hydraulic (pneumatic) slow-closure butterfly valve with normal off-axis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1098177A true CN1098177A (en) | 1995-02-01 |
Family
ID=4987589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93109379 Pending CN1098177A (en) | 1993-07-29 | 1993-07-29 | Liquid (gas) hydraulic (pneumatic) slow-closure butterfly valve with normal off-axis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1098177A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182672A (en) * | 2011-05-17 | 2011-09-14 | 肖凤桂 | Adjustable automatic intercept valve |
-
1993
- 1993-07-29 CN CN 93109379 patent/CN1098177A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182672A (en) * | 2011-05-17 | 2011-09-14 | 肖凤桂 | Adjustable automatic intercept valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |