CN206299844U - A kind of high-pressure check valve of low leakage - Google Patents
A kind of high-pressure check valve of low leakage Download PDFInfo
- Publication number
- CN206299844U CN206299844U CN201621478355.2U CN201621478355U CN206299844U CN 206299844 U CN206299844 U CN 206299844U CN 201621478355 U CN201621478355 U CN 201621478355U CN 206299844 U CN206299844 U CN 206299844U
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- valve body
- valve
- top board
- bearing
- low leakage
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Abstract
The utility model discloses a kind of high-pressure check valve of low leakage, including valve body and top board, the valve body and the top board connect to form cavity, the cavity includes that what is be interconnected enters matter chamber and pledge chamber, the valve body is provided with two relative bearing blocks, bearing block is provided with bearing described in two, the bearing is fixed with a rotating shaft, and the bearing is provided with bearing cap, the rotating shaft is installed with valve plate, the valve plate is located in the valve body for blocking into matter chamber and pledge chamber, wherein, the first sealing structure is provided between the valve body and the top board, first sealing structure includes:Located at the valve body recess and top board groove of valve body and top board junction, and located at the caulking gum of valve body and top board junction, the caulking gum is partially submerged into valve body recess and top board groove.Compared with the prior art, the utility model provides a kind of high-pressure check valve of low leakage, and its compact conformation, good sealing effect can realize that low leakage is required under hyperbaric environment.
Description
Technical field
The utility model is related to valve field, more particularly, to a kind of high-pressure check valve of low leakage.
Background technology
In nuclear power ventilating system, existing check-valves product is generally used for lower pressure(Less than 20000Pa)Under operating mode.
As nuclear power station ventilating system is improved and development need, it is desirable to which check-valves still can keep low higher than 62500Pa power lower valve
The requirement of external leakage.At elevated pressures, easily destructive deformation in valve body and blade to current check-valves product there is, and in height
Under operating pressure, can there is problems with valve:1st, easily there is lubricating grease and air leakage in rotating shaft and bearing cap end;2nd, oil filler point
Failed under hyperbaric environment, lubricating grease and air leakage easily occur;3rd, sealed between valve top board and valve body and air leakage easily occurs.
These problems can cause valve invalidation, have a strong impact on the normal operation of system, or even cause the accident.
The Chinese invention patent of Application No. 201510773646.8 discloses a kind of self sealss swing type soft seal non-return
Valve, including valve body, are provided with interconnected admission chamber and go out sap cavity in valve body, rocking bar is hinged with valve body, are connected with rocking bar
By admission chamber and the valve plate that sap cavity is blocked can be gone out, elastic sealing layer is coated with the outer surface of valve plate;The end face of valve plate is use
In the connecting end surface, other end being connected with rocking bar be seal face;The cavity wall inner face of the admission chamber be provided with counterbore from
And make to form transition shoulder between admission chamber and counterbore;Elastic sealing layer on the valve plate seal face is contacted with transition shoulder
The axial seal pair for realizing axial seal can be formed after cooperation;The hole wall of elastic sealing layer and counterbore on the valve plate outer peripheral face
The radial seal pair for realizing radial seal can be formed after being engaged.The check valve structure is simple, with axial seal and radial direction
Sealing double effectses, even if being not easy to cause seepage or leakage when Fluid pressure is relatively low.But the invention only address only non-return
The sealing problem when valve plate of valve is closed, not to the sealing between the sealing between valve body and top board and rotating shaft and bearing cap
Make improvements, therefore be not still suitable for high pressure operating mode.
The content of the invention
To overcome existing technological deficiency, the utility model provides one kind and is wanted compared with low external leakage is met under high workload pressure
The check-valves asked.
To realize the purpose of this utility model, it is achieved using following technical scheme:
A kind of high-pressure check valve of low leakage, including valve body and top board, the valve body and the top board connect to form cavity,
The cavity includes that what is be interconnected enters matter chamber and pledge chamber, and the valve body is provided with two relative bearing blocks, bearing block described in two
Bearing is installed, the bearing is fixed with a rotating shaft, and the bearing is provided with bearing cap, and the rotating shaft is installed with valve
Plate, the valve plate is located at for blocking into matter chamber and pledge chamber in the valve body, wherein, set between the valve body and the top board
There is the first sealing structure, first sealing structure includes:Located at the valve body recess and top board groove of valve body and top board junction,
And located at the caulking gum of valve body and top board junction, the caulking gum is partially submerged into valve body recess and top board groove.
High-pressure check valve provided by the utility model is a kind of swing check valve, and valve body is provided with bearing block, rotating shaft
Two ends are installed on the bearing block of valve body, and bearing cap is arranged on bearing block, and valve plate is installed in rotating shaft, and valve plate is driven through and is
System pressure-driven rotating shaft rotates to realize check function so as to drive valve plate.It is provided between valve body and top board in the utility model close
Seal structure, can effectively reduce the lubricating grease and air leakage phenomenon occurred under high pressure operating mode.
In order to be able to low leakage requires that the utility model sets groove, top in top board and valve body respectively under realizing hyperbaric environment
The sealing of plate and valve body caused in a part of caulking gum insertion groove, is thusly-formed stop part, can effectively will be high in valve body
Pressure gas stream is blocked in the inner side of groove so that top board reaches extraordinary sealing effectiveness with valve body.
Preferably, the valve body recess is corresponding with the position of the top board groove.This programme causes that caulking gum is embedded in
After the groove of top board and valve body, can preferably stop the high pressure draught for sending out internal, prevent high pressure draught from leaking.
Further, second seals structure, and the second seals structure are provided between the rotating shaft and the bearing cap
Including axle Yx shape sealing rings.In order to meet the requirement of low leakage under compared with high workload pressure, the utility model is in the close of shaft end
Envelope employs axle Yx shape sealing rings, and axle can bear the air pressure of 31.5MPa with Yx shape sealing rings.When sealing structure be subject to by
Inside during high pressure draught outward, axle is pressurized with Yx shape sealing rings, and because axle is in close contact with Yx shape sealing rings by bearing cap, axle is used
Yx shape sealing rings slit port can only open to bearing cap and rotating shaft both sides so that axle is compressed tightly against axle with Yx shape sealing ring prongs
Lid and rotating shaft both sides are held, axle is bigger with the compression of Yx shape sealing rings, and sealing effectiveness is better.
Further, the second seals structure also includes the pad being located between the bearing block and bearing cap.When close
Seal structure is subject to during by interior high pressure draught outward, and high pressure draught first passes around pad first to be stopped again, then is slowed down by bearing,
Finally reach at axle Yx shape sealing rings.Increase pad and stop that can reduce that axle Yx shape sealing rings are subject to presses again as first
Power, is effectively increased the durability of axle Yx shape sealing rings, improves its service life, in addition than axle Yx shape sealing rings, pad
It is more cheap, and be easier to change.
Further, the 3rd sealing structure is provided between the valve plate and the valve body, the 3rd sealing structure includes:
Located at the valve plate near the valve seat in the face for entering matter chamber, be embedded in the rubber seal of the valve seat, and located at the valve body and
The boss coordinated with the rubber seal.Sealing structure is set between valve plate and valve body, when high-pressure medium is flowed to from pledge chamber
When entering matter chamber, the sealing structure can prevent the air gap leakage of medium from valve plate and valve body from going out.Valve seat is provided with valve plate, on valve seat
Embedded rubber seal, because valve body is smaller with rubber seal contact area, valve part is easy to interior sink into rubber seal
In circle, valve seepage or leakage are not easily caused, so as to ensure that valve plate and the sealing structure of valve body possess good sealing.
Preferably, above-mentioned check-valves also includes counterweight component, tail end of the counterweight component located at the rotating shaft.Weight group
Part role is that can set valve plate Opening pressure, that is, the pressure for flowing into the fluid in valve can make valve plate when reaching setting pressure
Open, otherwise can not then open.In addition, the afterbody in rotating shaft sets counterweight component and can effectively improve the sealing property of check-valves.
Compared with the prior art, the utility model provides a kind of high-pressure check valve of low leakage, its compact conformation, sealing
Effect is good, can realize that low leakage is required under hyperbaric environment.In addition, being sealed between top board and valve body using fluting sealing structure, subtract
The leakage problem caused by welding deformation or machining accuracy deficiency etc., simple structure are lacked.
Brief description of the drawings
Fig. 1 forces down leakage check valve dimensional structure diagram for the utility model is high;
Fig. 2 is sealed structural representation at the utility model valve plate for forcing down leakage check valve high;
Fig. 3 is the utility model rotating shaft end(One)The fragmentary sectional view of sealing structure;
Fig. 4 is the utility model rotating shaft end(Two)The fragmentary sectional view of sealing structure.
Brief description of the drawings:1. valve body;2. top plate seal rubber;3. top board;4. rotating shaft;5. counterweight component;6. bearing
Lid;7. bearing block;8. pad;9. valve plate;10. rubber seal;11. pads;12. bearings;13. axles are close with Yx shapes
Seal;601. clutch shaft bearing lids;602. second bearing lids.
Specific embodiment
To make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with the accompanying drawings to the utility model
Implementation method is described in more detail.
Embodiment
As depicted in figs. 1 and 2, a kind of high-pressure check valve of low leakage, including valve body 1, top plate seal rubber 2, top board 3,
Rotating shaft 4, counterweight component 5, bearing cap 6, bearing block 7, pad 8, the valve body 1 are provided with two relative bearing blocks 7, the two ends of rotating shaft 4
On bearing block 7, valve plate 9 is fixedly connected with rotating shaft 4, and valve plate 9 is provided with valve seat, and the valve seat is closed circular ring-type, valve
Seat is embedded with rubber seal 10, valve under completely closed state, the upper valve base of valve plate 9 and the boss tight seal of valve body 1, due to
Valve body 1 is smaller with the contact area of caulking gum 10 on valve plate 9 so that valve body 1 is not susceptible to the contact surface of rubber seal 10
Leakage, sealability is strong.
Rotating shaft two ends sealing structure, as shown in Figure 3 and Figure 4, by bearing block 7, axle Yx shape sealing rings 13, rotating shaft 4,
Bearing cap 6, pad 11, valve body 1, top plate seal rubber 2 and top board 3 are constituted, and the sealing of the end of rotating shaft 4 is using axle Yx in the present embodiment
Shape sealing ring 13, axle can bear 31.5MPa air pressures with Yx shape sealing rings 13.When sealing structure is subject to by interior high pressure outward
During air-flow, high pressure draught stops again by pad first, then slows down by bearing 12, finally reaches axle Yx shape sealing rings 13
Place, now axle is pressurized with Yx shape sealing rings 13, and because axle is in close contact with Yx shape sealing rings 13 by bearing cap 6, axle is close with Yx shapes
The slit port of seal 13 can only open to bearing cap 6 and the both sides of rotating shaft 4 so that axle is compressed tightly against axle with the prong of Yx shape sealing rings 13
Hold lid 6 and the both sides of rotating shaft 4, axle Yx shape sealing rings 13 are pressurized bigger, and sealing effectiveness is better.
Sealing structure at the top board, as shown in Figure 3 and Figure 4, is made up of, top board top board 3, valve body 1 and top plate seal glue 2
3 cause that partial panels caulking gum 2 is pressed into the groove of top board 3 with the bolt connection of valve body 1, when inner high voltage air-flow is by top board
3 with 1 gap of valve body when, inner high voltage air-flow is easy to be blocked in groove inner side so that top board 3 reaches very well with the sealing of valve body 1
Sealing effectiveness.
Present embodiments provide a kind of high-pressure check valve of low leakage, its compact conformation, good sealing effect can be in high compression ring
Realize that low leakage is required under border.
Claims (6)
1. a kind of high-pressure check valve of low leakage, including valve body and top board, the valve body and the top board connect to form cavity, institute
Stating cavity includes that what is be interconnected enters matter chamber and pledge chamber, and the valve body is provided with two relative bearing blocks, bearing block peace described in two
Equipped with bearing, the bearing is fixed with a rotating shaft, and the bearing is provided with bearing cap, and the rotating shaft is installed with valve plate,
The valve plate is located in the valve body for blocking into matter chamber and pledge chamber, it is characterised in that the valve body and the top board it
Between be provided with the first sealing structure, first sealing structure includes:Located at the valve body recess and top board of valve body and top board junction
Groove, and located at the caulking gum of valve body and top board junction, the caulking gum is partially submerged into valve body recess and top board is recessed
In groove.
2. the high-pressure check valve of low leakage according to claim 1, it is characterised in that the valve body recess and the top board
The position of groove is corresponding.
3. the high-pressure check valve of low leakage according to claim 1, it is characterised in that the rotating shaft and the bearing cap it
Between be provided with second seals structure, the second seals structure includes axle Yx shape sealing rings.
4. the high-pressure check valve of low leakage according to claim 3, it is characterised in that the second seals structure also includes
Pad between the bearing block and bearing cap.
5. the high-pressure check valve of low leakage according to claim 1, it is characterised in that between the valve plate and the valve body
The 3rd sealing structure is provided with, the 3rd sealing structure includes:Located at the valve plate near the valve seat in the face for entering matter chamber, institute is embedded in
State the rubber seal of valve seat, and located at the valve body and the boss that coordinates with the rubber seal.
6. the high-pressure check valve of the low leakage according to any one of claim 1 ~ 5, it is characterised in that also including weight group
Part, tail end of the counterweight component located at the rotating shaft.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201621478355.2U CN206299844U (en) | 2016-12-30 | 2016-12-30 | A kind of high-pressure check valve of low leakage |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN201621478355.2U CN206299844U (en) | 2016-12-30 | 2016-12-30 | A kind of high-pressure check valve of low leakage |
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CN206299844U true CN206299844U (en) | 2017-07-04 |
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CN201621478355.2U Active CN206299844U (en) | 2016-12-30 | 2016-12-30 | A kind of high-pressure check valve of low leakage |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106523745A (en) * | 2016-12-30 | 2017-03-22 | 广东申菱环境系统股份有限公司 | Low-leakage high-pressure check valve |
CN108036369A (en) * | 2017-12-07 | 2018-05-15 | 湖北中瑞天恒节能科技发展有限公司 | Kitchen range with defencive function |
-
2016
- 2016-12-30 CN CN201621478355.2U patent/CN206299844U/en active Active
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106523745A (en) * | 2016-12-30 | 2017-03-22 | 广东申菱环境系统股份有限公司 | Low-leakage high-pressure check valve |
CN108036369A (en) * | 2017-12-07 | 2018-05-15 | 湖北中瑞天恒节能科技发展有限公司 | Kitchen range with defencive function |
CN108036369B (en) * | 2017-12-07 | 2019-09-20 | 湖北中瑞天恒节能科技发展有限公司 | Kitchen range with defencive function |
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