CN208764418U - A kind of power station inlet valve Special valve body air valve - Google Patents
A kind of power station inlet valve Special valve body air valve Download PDFInfo
- Publication number
- CN208764418U CN208764418U CN201821140036.XU CN201821140036U CN208764418U CN 208764418 U CN208764418 U CN 208764418U CN 201821140036 U CN201821140036 U CN 201821140036U CN 208764418 U CN208764418 U CN 208764418U
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- valve
- valve body
- floating ball
- outer barrel
- power station
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Abstract
The utility model relates to a kind of power station inlet valve Special valve body air valves, belong to valve technology field, scheme are as follows: valve deck is equipped on valve body, valve deck is provided centrally with inner cylinder, top cover is provided at the top of inner cylinder, side is provided with water hole, the center of top cover is slidably fitted with valve shaft, gland is installed at the top of valve shaft, the spring being sleeved on valve shaft is provided between gland and top cover, the outside of spring is cased with spring shield, spring shield is fixed on top cover, the bottom of valve shaft is equipped with floating drum, outer barrel is also equipped on valve deck, cover board is provided at the top of outer barrel, support base is installed at the top of cover board, sealing ring is installed on support base, the bottom of cover board is equipped with floating ball installation bucket, floating ball is provided in floating ball installation bucket, the side of floating ball installation bucket is provided with inlet opening, bottom is provided with multiple drainage holes, cover board, support Seat and pressing plate are provided centrally with the through-hole contacted for floating ball with sealing ring；The utility model is widely used in the air valve in power station.
Description
Technical field
The utility model relates to a kind of power station inlet valve Special valve body air valves, belong to valve technology field.
Background technique
It is generally provided with inlet valve on the intake pressure steel pipe of the hydraulic turbine, under installation site condition, depends on water wheels
The requirement of machine and the conduit pipe quickly property reliable for operation under nominal situation and accident condition, also depends on power station water conservancy project and builds
Build the economic factor of arrangement and entire hydrojunction.The longer power station of waterpipe, due to pipeline water-filling and emptying time compared with
It is long, an inlet valve can be added before the hydraulic turbine, in accident feelings, drawn loaded on comparable be mounted on of the inlet valve before the hydraulic turbine
The valve at water pipe beginning reliably can quickly cut off the water flow for flowing to the hydraulic turbine, and furthermore it also allows to carry out water wheels machine overhauling and nothing
Diversion penstock need to be emptied.
Air valve is located at the top for being located at inlet valve downstream pressure steel pipe, according to " the large and medium-sized water wheels in T14478-2012 GB ∕
Machine inlet valve fundamental technical specifications inlet valve " 4.12 air valve should be set, air valve should have the function of automatic inlet and outlet
Energy.
The main function of air valve is: when main valve is opened, air in pressure release steel pipe and valve body guarantees that main valve exists
It is opened in hydrostatic；When main valve is closed, the tonifying Qi into penstock and valve body prevents from being vacuum formed, and makes steel pipe and valve body will not
It is destroyed.Therefore the Reliability of Microprocessor of air valve will directly affect the safe and stable operation of unit.
Currently, existing air valve mostly uses greatly composite exhaust valve, inside mainly have stainless steel floating ball and chock plug,
Air valve is emerged a large amount of water when floating ball floats closing when inlet valve is opened, and is especially closed not when floating ball is clamped by sundries
Sternly, the water of penstock pours out, and be easy to cause water logging workshop.Corrosion fracture or bite occur for the operating mechanism of floating ball simultaneously
Situation causes floating ball to be not closed completely, and is also easy to happen the risk of water logging workshop.
Utility model content
To solve technical problem of the existing technology, the utility model provide it is a kind of reasonable in design, using double
Resealing improves the power station inlet valve Special valve body air valve of sealing reliability.
To achieve the above object, technical solution used by the utility model is that a kind of power station inlet valve Special valve body is empty
Air valve, including valve body are equipped with valve deck on the valve body, and the valve deck is provided centrally with inner cylinder, the top of the inner cylinder
Portion is provided with top cover, and side is provided with water hole, and the center of the top cover is slidably fitted with valve shaft, the top installation of the valve shaft
There is gland, the spring being sleeved on valve shaft is provided between the gland and top cover, the outside of the spring is cased with spring shield, institute
It states spring shield to be fixed on top cover, the bottom of the valve shaft is equipped with floating drum, and the floating drum is located in valve body, and the upper cover of floating drum
It compressing and seals with inner cylinder, outer barrel is also equipped on the valve deck, the valve body, valve deck and outer barrel use flanged joint,
And sealed by O-ring seal, the outer barrel is sleeved on the outside of inner cylinder, and cover board is provided at the top of outer barrel, institute
It states and support base is installed at the top of cover board, sealing ring is equipped with by pressing plate on the support base, the bottom of the cover board is equipped with
Floating ball installs bucket, and floating ball is provided in the floating ball installation bucket, and the side of the floating ball installation bucket is provided with inlet opening, and bottom is set
It is equipped with multiple drainage holes, the cover board, support base and pressing plate are provided centrally with the through-hole contacted for floating ball with sealing ring.
Preferably, the center of the top cover is equipped with fixing sleeve, and composite bush, the valve shaft are provided in the fixing sleeve
It is slidably mounted in composite bush.
Preferably, middle cylinder, the top installation of the middle cylinder are additionally provided between the inner cylinder and outer barrel
There is water fender, the water fender is provided centrally with circular hole.
Preferably, the top two sides of the pressing plate are also equipped with screw rod, are fixed with baffle at the top of the screw rod.
Compared with prior art, the utility model has following technical effect that the utility model uses double sealing structure,
When inlet valve starts water-filling, when the drained water of air is full of in valve body, floating drum floats closing therewith, is formed between inner sleeve
Sealing；If poorly sealed, leak enters in outer barrel, and floating ball is jacked up, and realizes and seals with sealing ring, realizes that second is close
Envelope；After inlet valve is closed, when stream is empty in valve body, under Gravitative Loads, valve body is communicated with the atmosphere in floating drum free-falling, is broken
Bad valve body vacuum guarantee valve body safety.In addition, valve shaft carries out self-lubricating using composite bush, prevent valve shaft from getting rusty bite.
Detailed description of the invention
Fig. 1 is this practical structural schematic diagram.
Specific embodiment
In order to which technical problem to be solved in the utility model, technical solution and beneficial effect is more clearly understood, with
Lower combination accompanying drawings and embodiments, the present invention will be further described in detail.It should be appreciated that specific reality described herein
It applies example to be only used to explain the utility model, is not used to limit the utility model.
As shown in Figure 1, a kind of power station inlet valve Special valve body air valve, including valve body 1, valve deck is installed on valve body 1
2, valve deck 2 is provided centrally with inner cylinder 3, and the top of inner cylinder 3 is provided with top cover 4, and side is provided with water hole 5, top cover 4
Center is slidably fitted with valve shaft 6, and the top of valve shaft 6 is equipped with gland 7, is provided with and is sleeved on valve shaft between gland 7 and top cover 4
Spring 8, the outside of spring 8 is cased with spring shield 9, and spring shield 9 is fixed on top cover 4, and the bottom of valve shaft 6 is equipped with floating drum 10,
Floating drum 10 is located in valve body 1, and the upper cover of floating drum 10 and inner cylinder 3 are compressed and sealed, and are also equipped with outer barrel 11, valve on valve deck 2
Body 1, valve deck 2 and outer barrel 11 use flanged joint, and are sealed by O-ring seal 12, and outer barrel 11 is sleeved on inner cylinder 3
Outside, and the top of outer barrel 3 is provided with cover board 13, and support base 14 is equipped at the top of cover board 13, passes through pressing plate on support base 14
15 are equipped with sealing ring 16, and the bottom of cover board 13 is equipped with floating ball installation bucket 17, is provided with floating ball 18 in floating ball installation bucket 17, floats
The side of ball installation bucket 17 is provided with inlet opening 19, and bottom is provided with multiple drainage holes 20, cover board 13, support base 14 and pressing plate 15
Be provided centrally with the through-hole 21 contacted for floating ball with sealing ring.
When the utility model is used, valve body is connect with inlet valve.Floating drum is separated with inner cylinder under the effect of gravity.When into
When water valve starts water-filling, air is gradually emptied in valve body, while water drives floating drum to move up, due to being equipped with compression on valve shaft
Spring, hydraulic pressure smaller in this way can rise floating drum.Floating drum is compressed with inner cylinder and is sealed under the action of water pressure, is formed
First of sealing.When the poorly sealed generation leak of floating drum, water is entered in outer barrel by water hole.With water level raising into
Entering in floating ball installation bucket, floating ball is jacked up, floating ball enters in the through-hole of support base after rising, compression sealing is contacted with sealing ring,
Form second sealing, sealed reliable.After inlet valve is closed, water flows out automatically, and floating drum under the effect of gravity, moves down,
Valve body is communicated with the atmosphere, destroying spiral case vacuum ensures spiral case safety.
Wherein, the center of top cover 4 is equipped with fixing sleeve 22, and composite bush 23, the sliding peace of valve shaft 6 are provided in fixing sleeve 22
In composite bush 23.Self-lubricating is able to carry out using composite bush, valve shaft is avoided to get rusty.Inner cylinder 3 and outer barrel 11 it
Between be additionally provided with middle cylinder 24, the top of middle cylinder 24 is equipped with water fender 25, and water fender 25 is provided centrally with circular hole
26.Middle cylinder can buffer leak pressure, and water is avoided to cause to impact to outer barrel.The top two sides of pressing plate 15 are also equipped with spiral shell
Bar 27, the top of screw rod 27 are fixed with baffle 28.Baffle, which mainly plays, prevents sundries from entering floating ball installation bucket, guarantees floating ball energy
It works normally.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should all wrap in the utility model model within the spirit and principle of utility model
In enclosing.
Claims (4)
1. a kind of power station inlet valve Special valve body air valve, including valve body, valve deck is installed on the valve body, feature exists
In: the valve deck is provided centrally with inner cylinder, and top cover is provided at the top of the inner cylinder, and side is provided with water hole, institute
The center for stating top cover is slidably fitted with valve shaft, and gland is equipped at the top of the valve shaft, is provided between the gland and top cover
The spring being sleeved on valve shaft, the outside of the spring are cased with spring shield, and the spring shield is fixed on top cover, the valve shaft
Bottom is equipped with floating drum, and the floating drum is located in valve body, and the upper cover of floating drum and inner cylinder are compressed and sealed, and are also pacified on the valve deck
Equipped with outer barrel, the valve body, valve deck and outer barrel use flanged joint, and are sealed by O-ring seal, the outer barrel set
Mounted in the outside of inner cylinder, and it is provided with cover board at the top of outer barrel, support base, the support base are installed at the top of the cover board
Upper to be equipped with sealing ring by pressing plate, the bottom of the cover board is equipped with floating ball installation bucket, is provided in the floating ball installation bucket
Floating ball, the side of floating ball installation bucket are provided with inlet opening, and bottom is provided with multiple drainage holes, the cover board, support base and
Pressing plate is provided centrally with the through-hole contacted for floating ball with sealing ring.
2. a kind of power station inlet valve Special valve body air valve according to claim 1, it is characterised in that: the top cover
Center is equipped with fixing sleeve, and composite bush is provided in the fixing sleeve, and the valve shaft is slidably mounted in composite bush.
3. a kind of power station inlet valve Special valve body air valve according to claim 1, it is characterised in that: the inner cylinder
It is additionally provided with middle cylinder between outer barrel, water fender, the center of the water fender are installed at the top of the middle cylinder
It is provided with circular hole.
4. a kind of power station inlet valve Special valve body air valve according to claim 1, it is characterised in that: the pressing plate
Top two sides are also equipped with screw rod, are fixed with baffle at the top of the screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821140036.XU CN208764418U (en) | 2018-07-18 | 2018-07-18 | A kind of power station inlet valve Special valve body air valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821140036.XU CN208764418U (en) | 2018-07-18 | 2018-07-18 | A kind of power station inlet valve Special valve body air valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208764418U true CN208764418U (en) | 2019-04-19 |
Family
ID=66129519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821140036.XU Active CN208764418U (en) | 2018-07-18 | 2018-07-18 | A kind of power station inlet valve Special valve body air valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208764418U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112031110A (en) * | 2020-08-31 | 2020-12-04 | 如皋国创环保设备有限公司 | Suction type outdoor automatic drainage device |
-
2018
- 2018-07-18 CN CN201821140036.XU patent/CN208764418U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112031110A (en) * | 2020-08-31 | 2020-12-04 | 如皋国创环保设备有限公司 | Suction type outdoor automatic drainage device |
| CN112031110B (en) * | 2020-08-31 | 2022-02-25 | 如皋国创环保设备有限公司 | Suction type outdoor automatic drainage device |
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