CN205806584U - A kind of check valve - Google Patents
A kind of check valve Download PDFInfo
- Publication number
- CN205806584U CN205806584U CN201620590523.0U CN201620590523U CN205806584U CN 205806584 U CN205806584 U CN 205806584U CN 201620590523 U CN201620590523 U CN 201620590523U CN 205806584 U CN205806584 U CN 205806584U
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- valve
- bypass
- flap
- main channel
- fluid main
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Abstract
This utility model relates to a kind of check valve, this check valve includes valve body, valve gap, the inside of described valve body and valve gap is provided with fluid main channel, it is provided with flap inside described fluid main channel, the bypass channel connected with fluid main channel it is provided with in the middle part of described valve body, described flap includes flap and lower Disc, is provided with transmission push rod between described upper flap and lower Disc；Arranging bypass valve unit in the exit of described bypass channel, and closed by bypass channel by the sealing ring on bypass valve unit, one end of described bypass valve unit is connected with transmission ejector pin contact, and is controlled the opening and closing of bypass valve unit by transmission push rod.Compared with prior art, this utility model, according to the size automatic shutter bypass valve unit of the water yield, can effectively prevent the generation of high pressure water hammer, extends the service life of check-valves.
Description
Technical field
This utility model relates to valve field, is specifically related to a kind of check valve.
Background technology
Check valve is arranged on the high pressure water pump outlet conduit of fired power generating unit, prevents to aqueous reflux, protection feedwater
Pump.At present, domestic and international its non-return structure of all of check-valves is all the mode using the stifled valve port of lid, wherein has gravity sag formula
With damping slow-closing type.So-called gravity sag formula includes swing type, and this is a kind of the most frequently used check-valves, its defect: work as fluid
During distress resolves, its flap " wafts " in a fluid, and when the showy power of flap and Guan Bi, flap " fans " resistance that dynamic fluid need to overcome
Power causes the Guan Bi of flap and delays, and the time that this Guan Bi delays is much larger than the time produced by water hammer, and namely flap is also
Being not turned off, water pipe flows backwards and has occurred and that, and in accelerating situation, and be the most also dependent on flowing backwards produced opposite force just by valve
Aperture of door is thoroughly closed, and the inertia of circulating water is the biggest, thus the water density forming big water hammer and water hammer lower end increases severely, gesture
Can develop into buffer brake ripple, and to make water hammer be Decay Rate concussion, in turn result in flap magaseism so that it is the lost of life.Additionally hinder
Buddhist nun's slow-closing type is in water hammer and mid-term occurs, and it is bigger that valve flap surface bears water hammer power.Above-mentioned drawbacks limit of the prior art these
Valve application in high pressure non-return.
Utility model content
Defect that the purpose of this utility model is contemplated to overcome above-mentioned prior art to exist and provide the one can be the most anti-
The check valve that sealing hammer produces.
The purpose of this utility model can be achieved through the following technical solutions: a kind of check valve, this idle discharge non-return
Valve includes valve body, valve gap a, and the inside of described valve body and valve gap a is provided with fluid main channel, is provided with valve inside described fluid main channel
Lobe, it is characterised in that be provided with the bypass channel connected with fluid main channel in the middle part of described valve body, described flap include flap and
Lower Disc, is provided with transmission push rod between described upper flap and lower Disc；In the exit of described bypass channel, bypass valve is set
Unit, and by the sealing ring on bypass valve unit, bypass channel is closed, one end of described bypass valve unit and transmission
Ejector pin contact connects, and is controlled the opening and closing of bypass valve unit by transmission push rod.
Described bypass valve unit includes spool, is arranged on the valve seat outside spool, is arranged on the throttling of spool rear end
Orifice plate, be arranged on spool front end spool jacking block, be arranged on outside spool jacking block and for close the sealing ring of bypass channel with
And be arranged on the valve gap b outside valve seat, described valve gap b and be bolted with the valve body of check valve, described spool jacking block
It is connected with described transmission ejector pin contact.
Offer duct on described sealing ring, be used for connecting bypass channel and bypass valve unit.
Described transmission push rod is L-shaped, and the long limit of transmission push rod is connected with described upper flap and lower Disc, transmission push rod short
Limit contacts connection with described spool jacking block, and one end of minor face is rotationally connected by bearing pin with valve body.
The upper end of described lower Disc is connected with described transmission push rod, and the lower end of lower Disc is fixed in guide pin bushing a, described in lead
Set a is slidably connected with fluid main channel.
The diameter of the middle part cavity of described fluid main channel is more than the diameter of fluid main channel remainder, described upper valve
The shape that lobe is big up and small down, the upper end of upper flap is connected with the lower end in contact of the middle part cavity of fluid main channel, upper flap
Upper end is fixed in guide pin bushing b, and the lower end of upper flap is connected with transmission push rod, and described guide pin bushing b is slidably connected with fluid main channel.Its
In, upper flap and lower Disc use rustless steel built-up welding to form, wear-resisting, resistance to marring strong, seals reliable.
When pipeline connects described check valve, described check valve right angle setting.
Operation principle of the present utility model is as follows: during original state, upper flap due to action of gravity, the upper end of upper flap with
The lower end in contact of the middle part cavity of fluid main channel connects, thus block fluid flow main channel.
When water pump is opened, and when current flow in fluid main channel from the bottom up, lower Disc and upper flap move upward, on
Flap departs from middle part cavity, and fluid main channel is unimpeded.Lower Disc and upper flap " waft " and float in current；Rise at lower Disc
During, drive the long limit of transmission push rod also to move upward, owing to one end of transmission push rod minor face is provided with pivot pin, so transmission top
The minor face of bar promotes spool jacking block to move out, thus the duct promoting spool to move out and blocking on restricting orifice, thus
Bypass valve unit is closed, again because bypass channel is blocked by sealing ring, so current cannot flow out from bypass channel, can only
Flow through from fluid main channel from the bottom up.
When confluent reduces, upper flap falls, and drives the long limit of transmission push rod to move downward, so that transmission top
The minor face inward of bar, spool jacking block loses thrust, so that separate between spool with restricting orifice, current are from sealing ring
On duct in flow into bypass valve unit, and flow out from restricting orifice, thus maintain the permission flow that water pump is minimum；When
When water pump stops, upper flap falls automatically, contacts and close fluid main channel with middle part cavity, prevents high pressure water hammer water supply system
Destruction.
Compared with prior art, the beneficial effects of the utility model are embodied in following several respects:
(1) emptying check-valves of the present utility model arranges bypass valve unit, the opening and closing of this unit and check-valves fluid master
The opening and closing of passage is contrary, can effectively reduce the generation of high pressure water hammer, thus extend the service life of emptying check-valves；
(2) upper flap and lower Disc use rustless steel built-up welding to form, wear-resisting, resistance to marring strong, seals reliable.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Wherein, 1 is valve body, and 2 is valve gap a, and 3 is lower Disc, and 4 is upper flap, and 5 is transmission push rod, and 6 is guide pin bushing a, and 7 for leading
Set b, 8 is guide pad a, and 9 is guide pad b, and 10 is pivot pin, and 11 is spool jacking block, and 12 is spool, and 13 is restricting orifice, and 14 is close
Seal, 15 is valve seat, and 16 is valve gap b, and 17 is through hole.
Detailed description of the invention
Elaborating embodiment of the present utility model below, the present embodiment is being front with technical solutions of the utility model
Put and implement, give detailed embodiment and concrete operating process, but protection domain of the present utility model does not limits
In following embodiment.
Embodiment
A kind of check valve, its structure is as it is shown in figure 1, this check valve includes valve body 1, valve gap a2, valve body 1 and valve
Lid a2 is equipped with fluid passage, and after valve body 1, valve gap a2 are bolted, two-part fluid passage is interconnected
Form fluid main channel, it addition, valve body 1 and the valve gap a2 diameter in junction are more than the diameter at other fluid passages, thus
Form middle chamber.Being provided with flap 4 and lower Disc 3 in fluid main channel, lower Disc 3 is by guide pad a8 and guide pin bushing a6 even
Connecing, guide pin bushing a6 can slide along the limit of fluid main channel, and upper flap 4 is connected with guide pin bushing b7 by guide pad b9, guide pin bushing b7
Can slide along the limit of fluid main channel, when there is no water flow, the upper end of upper flap 4 is blocked the lower end of middle chamber and is led to
Road, thus sealing fluid main channel.
Being provided with a transmission push rod 5 between the lower end and the upper end of lower Disc 3 of upper flap 4, this transmission push rod 5 is L-shaped, long
While be connected between flap 4 and lower Disc 3, the termination of minor face is connected with valve body 1 by pivot pin 10 so that this transmission push rod 5
Can rotate around this pivot pin 10.
Be additionally provided with a bypass channel at the middle part of valve body 1, and this bypass channel exit bypass valve list is set
Unit, and by the sealing ring 14 on bypass valve unit, bypass channel is closed.This bypass valve unit includes spool 12, arranges
Valve seat 15 outside spool 12, it is arranged on the restricting orifice 13 of spool 12 rear end, is arranged on the spool jacking block of spool 12 front end
11, it is arranged on outside spool jacking block 11 and for closing the sealing ring 14 of bypass channel and being arranged on the valve gap outside valve seat 15
B17, valve gap b16 are bolted with valve body 1, and spool jacking block 11 contacts connection with the minor face of transmission push rod 5.It addition, close
Seal 14 is provided with through hole 17, is used for connecting bypass valve unit and bypass channel.
When water pump is opened, and when current flow in fluid main channel from the bottom up, lower Disc 3 and upper flap 4 move upward,
Upper flap 4 departs from middle part cavity, and fluid main channel is unimpeded.Lower Disc 3 and upper flap 4 " wafing " float in current；At lower Disc 4
During rising, the long limit of transmission push rod 5 is driven also to move upward, owing to one end of transmission push rod 5 minor face is provided with pivot pin 10,
So the minor face of transmission push rod 5 promotes spool jacking block 11 to move out, thus spool 12 is promoted to move out and block throttle orifice
Duct on plate 13, thus bypass valve unit is closed, again because bypass channel is blocked, so current cannot by sealing ring 14
Flow out from bypass channel, can only flow through from fluid main channel from the bottom up.
When confluent reduces, upper flap 4 falls, and drives the long limit of transmission push rod 5 to move downward, so that transmission
The minor face inward of push rod 5, spool jacking block 11 loses thrust, so that separate between spool 12 with restricting orifice 13, water
Stream flows into bypass valve unit in the through hole 15 from sealing ring 14, and flows out from restricting orifice 13, thus maintains water pump
Minimum permission flow；When water pump stops, upper flap 4 falls automatically, contacts and close fluid main channel with middle part cavity, anti-
The only destruction of high pressure water hammer water supply system.
Claims (7)
1. a check valve, this check valve includes valve body, valve gap a, and the inside of described valve body and valve gap a is provided with fluid
Main channel, is provided with flap inside described fluid main channel, it is characterised in that is provided with in the middle part of described valve body and connects with fluid main channel
Bypass channel, described flap includes flap and lower Disc, is provided with transmission push rod between described upper flap and lower Disc；Institute
The exit stating bypass channel arranges bypass valve unit, and is sealed by bypass channel by the sealing ring on bypass valve unit
Closing, one end of described bypass valve unit is connected with transmission ejector pin contact, and controls bypass valve unit by transmission push rod
Opening and closing.
A kind of check valve the most according to claim 1, it is characterised in that described bypass valve unit includes valve
Core, it is arranged on the valve seat outside spool, is arranged on the restricting orifice of spool rear end, is arranged on the spool jacking block of spool front end, sets
Put outside spool jacking block and for closing the sealing ring of bypass channel and being arranged on the valve gap b outside valve seat, described valve gap b
Being bolted with valve body, described spool jacking block is connected with described transmission ejector pin contact.
A kind of check valve the most according to claim 2, it is characterised in that offer for connecting on described sealing ring
Bypass channel and bypass valve unit duct.
A kind of check valve the most according to claim 2, it is characterised in that described transmission push rod is L-shaped, transmission top
The long limit of bar is connected with described upper flap and lower Disc, and the minor face of transmission push rod contacts connection with described spool jacking block, the one of minor face
End is rotationally connected by bearing pin with valve body.
A kind of check valve the most according to claim 1, it is characterised in that the upper end of described lower Disc and described biography
Dynamic push rod connects, and the lower end of lower Disc is fixed in guide pin bushing a, and described guide pin bushing a is slidably connected with fluid main channel.
A kind of check valve the most according to claim 1, it is characterised in that the middle part cavity of described fluid main channel
Diameter more than the diameter of fluid main channel remainder, the shape that described upper flap is big up and small down, the upper end of upper flap with
The lower end in contact of the middle part cavity of fluid main channel connects, and the upper end of upper flap is fixed in guide pin bushing b, the lower end of upper flap and biography
Dynamic push rod connects, and described guide pin bushing b is slidably connected with fluid main channel.
A kind of check valve the most according to claim 1, it is characterised in that connect described check valve on pipeline
Time, described check valve right angle setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620590523.0U CN205806584U (en) | 2016-06-17 | 2016-06-17 | A kind of check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620590523.0U CN205806584U (en) | 2016-06-17 | 2016-06-17 | A kind of check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205806584U true CN205806584U (en) | 2016-12-14 |
Family
ID=58143196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620590523.0U Active CN205806584U (en) | 2016-06-17 | 2016-06-17 | A kind of check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205806584U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107514496A (en) * | 2016-06-17 | 2017-12-26 | 上海弘盛特种阀门制造股份有限公司 | A kind of check valve |
| CN112066042A (en) * | 2020-07-31 | 2020-12-11 | 清华大学 | Control rod drive line non-return combination valve structure and control rod water pressure drive system |
-
2016
- 2016-06-17 CN CN201620590523.0U patent/CN205806584U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107514496A (en) * | 2016-06-17 | 2017-12-26 | 上海弘盛特种阀门制造股份有限公司 | A kind of check valve |
| CN112066042A (en) * | 2020-07-31 | 2020-12-11 | 清华大学 | Control rod drive line non-return combination valve structure and control rod water pressure drive system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |