CN208417651U - A kind of safety valve with redundancy back-pressure balance device - Google Patents
A kind of safety valve with redundancy back-pressure balance device Download PDFInfo
- Publication number
- CN208417651U CN208417651U CN201821172317.3U CN201821172317U CN208417651U CN 208417651 U CN208417651 U CN 208417651U CN 201821172317 U CN201821172317 U CN 201821172317U CN 208417651 U CN208417651 U CN 208417651U
- Authority
- CN
- China
- Prior art keywords
- valve
- flap
- balance device
- pressure balance
- bellows
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Safety Valves (AREA)
Abstract
The utility model relates to a kind of safety valves with redundancy back-pressure balance device, including valve body, valve deck, valve seat, flap seat, flap, valve rod, bellows, there is sealing surface on flap, sealing surface can be sealed cooperation with valve seat, safety valve further includes redundancy back-pressure balance device, redundancy back-pressure balance device includes the cushion block for being located at bellows lower part, is set in the guide ring for being located at bellows top on valve rod, and the top of cushion block is connected with valve rod lower end, and the lower part of cushion block is connected with flap；The upper end of guide ring offsets with valve rod, and guide ring outside diameter, bellows central diameter, sealing surface central diameter are equal.The secondary balancing of safe valve outlet pressure (back pressure) may be implemented in the utility model, guarantees that safe valve performance is stablized；By the outer circle of guide ring, various specifications safety valve can satisfy；Guide ring and valve rod use separate structure, and machining accuracy is high, conveniently；Can satisfy high back pressure and back pressure not allows to reduce too many operating condition, increases the availability of safety valve.
Description
Technical field
The utility model relates to valve fields, more particularly to a kind of safety valve with redundancy back-pressure balance device.
Background technique
Safety valve is that opening and closing element is in normally off under by external force, is surpassed when the pressure medium in equipment or pipeline increases
When crossing specified value, by outside system discharge medium come to prevent pressure medium in pipeline or equipment be more than the particular usage valve of specified value
Door.
It is general to select the safety valve with bellows when the outlet conduit of safety valve is there are when pressure, to eliminate outlet pressure
The influence of (back pressure) to safe valve performance.But bellows is an expendable part, there is certain service life, in the use process of safety valve
In have the possibility of damage, at this moment just need to design a kind of structure, guarantee the performance of safety valve in the case where bellows damage.
Currently available technology uses valve deck aperture: this method is that a hole is opened on valve deck as shown in Figure 1:, so that ripple
Tube cavity is communicated with atmosphere, and when bellows damage, outlet pressure (back pressure) will be discharged by aperture, ensure that safety valve in this way
Pressure is atmospheric pressure above sealing surface, to guarantee that the performance of safety valve is unaffected.Outlet medium is when needing to recycle, can also be with
A pipe is connect in valve deck aperture position, is connected in recyclable device.Although this method is convenient, there is also drawbacks.Due to valve
Lid aperture is smaller, and outlet pressure (back pressure) is little higher, and medium cannot be completely exhausted out, to form one above sealing surface
Constant-pressure influences valve opening.
Therefore as only by the influence of method elimination outlet pressure (back pressure) of valve deck aperture, some situation this method are difficult reality
Existing, safe valve outlet pressure (back pressure) does not allow to reduce too many for another example, otherwise can have an impact to the stabilization of system.At this moment it just needs
A kind of outlet pressure (back pressure) balancing device is designed to supplement the effect of bellows, outlet pressure (back pressure) balance is allowed to have dual guarantor
Shield.
Summary of the invention
One purpose of the utility model is to provide a kind of safety valve with redundancy back-pressure balance device, complete in bellows
It does not work when good, but plays the role of balancing redundancy back pressure when bellows damage, prevent outlet pressure (back pressure) to safety
The influence of valve performance.
In order to achieve the above objectives, the technical solution adopted in the utility model is:
A kind of safety valve with redundancy back-pressure balance device, including valve body, the valve deck that is connected to the valve body top,
The valve seat being arranged on the valve body, the valve that the intracorporal flap seat of the valve is set, is connected on the flap seat
Valve, lower end penetrate the valve body and be connected with the flap valve rod, be set in be located at outside the valve rod it is described
Bellows above flap, has sealing surface on the flap, and the sealing surface can be sealed with the valve seat
Cooperation, the safety valve further includes redundancy back-pressure balance device, and the redundancy back-pressure balance device includes positioned at described
The cushion block of bellows lower part is set in the guide ring for being located at the bellows top on the valve rod, the cushion block
Top is connected with the valve rod lower end, and the lower part of the cushion block is connected with the flap；The guide ring
Upper end offsets with the valve rod, the guide ring outside diameter, the bellows central diameter, the sealing surface central diameter phase
Deng.
Preferably, the redundancy back-pressure balance device further includes being arranged on the valve rod for limiting described lead
The lower limit block moved down to ring.
Preferably, the cushion block, the flap seat and the flap link into an integrated entity.
Preferably, the safety valve further includes that the intracorporal guide sleeve of the valve is arranged in, is pressed in the guide sleeve
The back pressure set on top, the flap seat, which can slide up and down to, to be arranged in the guide sleeve, and the bellows is located at
In the guide sleeve, the guide ring is located in the back pressure set.
Preferably, connection valve cover cavity and external exhaust nozzle are offered on the valve deck.
It is further preferred that being connected with recovery tube in the exhaust nozzle.
Preferably, the flap has the first face cooperated with valve seat, the second face being connected with cushion block, described
The middle part in the first face protrude to form diversion division, be located on the outside of the convex water conservancy diversion on first face and offer inclined-plane
Slot, on the outside of the surface groove described in the first face form the sealing surface described with valve base sealing cooperation, in the surface groove
The first face described on the outside of side, the diversion division has one section of planarea.
It is further preferred that the planarea is generally aligned in the same plane with the sealing surface.
It is further preferred that the diversion division has inclined surface, the inclined surface and the planarea passed through
The face of crossing is connected.
It is further preferred that the interconnecting piece being connected with cushion block is provided on second face, on the interconnecting piece
Offer connecting hole.
Since above-mentioned technical proposal is used, the utility model has the advantage that compared with prior art
1, the secondary balancing that safe valve outlet pressure (back pressure) may be implemented guarantees that safe valve performance is stablized；
2, by the outer circle of guide ring, it can satisfy various specifications safety valve；
3, guide ring and valve rod use separate structure, and machining accuracy is high, conveniently；
4, can satisfy high back pressure and back pressure not allows to reduce too many operating condition, increases the availability of safety valve.
Detailed description of the invention
Attached drawing 1 is the structural schematic diagram of safety valve in the prior art；
Attached drawing 2 is the structural schematic diagram of safety valve in the present embodiment；
Attached drawing 3 is the structural schematic diagram of flap in the present embodiment；
Attached drawing 4 is the structural schematic diagram of flap in the prior art.
Wherein: 1, valve body；2, valve deck；20, exhaust nozzle；3, valve seat；4, guide sleeve；5, flap seat；6, flap；60,
On one side；600, sealing surface；601, planarea；61, the second face；610, interconnecting piece；611, connecting hole；62, diversion division；620, it tilts
Face；63, surface groove；64, transition face；7, back pressure set；8, valve rod；9, bellows；10, cushion block；11, guide ring；12, lower limit is kept off
Block.
Specific embodiment
The utility model is further described with reference to the accompanying drawings and embodiments:
A kind of safety valve with redundancy back-pressure balance device as shown in Figure 2, including valve body 1, it is connected to 1 top of valve body
Valve deck 2, be arranged on valve body 1 valve seat 3, be arranged in valve body 1 guide sleeve 4, can slide up and down to setting be oriented to
The flap seat 5 in 4, the flap 6 being connected on flap seat 5, the back pressure set 7 for being pressed in 4 top of guide sleeve are covered, lower end penetrates valve body 1
And the valve rod 8 that is connected with flap 6 and the bellows 9 being located above flap 6 outside valve rod 8 is set in guide sleeve 4.Valve
There is sealing surface 600, flap 6 is sealed cooperation by sealing surface 600 and valve seat 3 on valve 6.
In the present embodiment: safety valve further includes redundancy back-pressure balance device, and redundancy back-pressure balance device includes being located at wave
The cushion block 10 of 9 lower part of line pipe is set in the guide ring 11 for being located at 9 top of bellows on valve rod 8, the top of cushion block 10 and valve rod 8
Lower end is connected, and lower part and the flap seat 5 and flap 6 of cushion block 10 link into an integrated entity.Guide ring 11 is located in back pressure set 7, leads
It offsets to the upper end of ring 11 with valve rod 8, the lower limit block 12 moved down on valve rod 8 for restricted guidance ring 11.Guiding
11 outside diameter a of ring, 9 central diameter b of bellows, 600 central diameter c of sealing surface are equal.
Connection valve cover cavity and external exhaust nozzle 20 are offered on valve deck 2, when outlet medium needs to recycle, exhaust nozzle
20 are connected with recovery tube.
When bellows 9 is intact: rely on 9 equalization vent pressure (back pressure) of bellows, in valve cover cavity with bellows cavity pressure
Sealing for atmospheric pressure, safety valve still relies on spring force to realize, the variation of outlet pressure (back pressure) do not influence in valve cover cavity with
Pressure in bellows chamber, to guarantee that the performance of safety valve is unaffected.
When bellows 9 damages: outlet pressure (back pressure) will be entered in bellows chamber by the gap between part, at this time wave
For the intraluminal pressure of line close to outlet pressure (back pressure), guide ring 11 is upward by medium power, and cushion block 10 is downward by medium power；Due to
11 outside diameter a of guide ring, 9 central diameter b of bellows, 600 central diameter c of sealing surface are equal, the upward power of guide ring 11 and cushion block 10 to
Under power it is identical (cavity pressure is identical), cancel out each other, to play the effect of similar bellows, the performance of safety valve is still
Guarantee by spring, influence of the variation of outlet pressure (back pressure) to safety valve is further lowered.
In addition, passing through the gap of guide ring 11 and other parts, medium can be further decreased and pass through 20 row of exhaust nozzle
Amount out, to guarantee the stability of system.
As shown in Figure 3: in the present embodiment: flap 6 uses elastic material, has the first face cooperated with valve seat 3
60, the second face 61 being attached with flap seat 5.Wherein:
The middle part in the first face 60 protrudes to form diversion division 62, and the outside on the first face 60 positioned at diversion division 62 offers inclined-plane
First face 60 of slot 63,63 outside of surface groove forms the sealing surface 600 being sealed with valve seat 3, in the present embodiment: surface groove
The first face 60 on the outside of 63 insides, diversion division 62 has one section of planarea 601, and planarea 601 and sealing surface 600 are located at same flat
Face.
In addition, diversion division 62 has inclined surface 620, inclined surface 620 is connected with planarea 601 by transition face 64, mistake
Crossing face 64 is preferably cambered surface.
Compared to the prior art as shown in Figure 4, medium all pours in surface groove by diversion division, although in inclined-plane slot position
It sets to form a downward medium power, the flow resistance for enhancing the sealing effect of flap, but increasing medium is unfavorable for the row of medium
It puts.Compared to the present embodiment as shown in Figure 3, medium is after the inclined surface of diversion division 62 620, transition face 64 along planarea 601
Flowing, certain media pour in surface groove 63, and certain media takes advantage of a situation continuation along streamlined flow, are changed by retaining certain plane
The medium flow field of safety valve.How much specific flow field will determine according to caliber size, pressure, structure etc. if capable of optimizing, structure design
When can by flow field analysis software determine.
It is provided with interconnecting piece 610 on second face 61, connecting hole 611 is offered on interconnecting piece 610.Interconnecting piece 610 protrudes from
Second face 61, connecting hole 611 open up that direction is consistent with the extending direction in the second face 61, the lower part of cushion block 10 and flap seat 5 with
And flap 6 is linked into an integrated entity by connecting hole 611.Compared to the prior art as shown in Figure 4, the company of opening up on the second face of flap
Socket part, is equivalent to the part-structure for eliminating flap, reduces the intensity of flap to a certain extent.Compared to sheet as shown in Figure 3
Embodiment, interconnecting piece 610 protrude from flap 6, increase the intensity of flap 6.
The above embodiments are only for explaining the technical ideas and features of the present invention, and its object is to allow be familiar with technique
Personage can understand the content of the utility model and implement accordingly, do not limit the protection scope of the present invention.
All equivalent change or modifications according to made by the spirit of the present invention essence, should all cover the protection scope of the utility model it
It is interior.
Claims (10)
1. a kind of safety valve with redundancy back-pressure balance device, including valve body, the valve deck that is connected to the valve body top, set
Set on the valve body valve seat, be arranged in the intracorporal flap seat of the valve, the flap being connected on the flap seat,
Lower end penetrate the valve body and be connected with the flap valve rod, be set in outside the valve rod and be located at the flap
The bellows of top has sealing surface on the flap, and the sealing surface can be sealed cooperation with the valve seat,
It is characterized by: the safety valve further includes redundancy back-pressure balance device, the redundancy back-pressure balance device includes being located at
The cushion block of the bellows lower part is set in the guide ring for being located at the bellows top on the valve rod, described
The top of cushion block is connected with the valve rod lower end, and the lower part of the cushion block is connected with the flap；Described leads
It offsets to the upper end of ring with the valve rod, the guide ring outside diameter, the bellows central diameter, the sealing surface
Central diameter is equal.
2. a kind of safety valve with redundancy back-pressure balance device according to claim 1, it is characterised in that: described is superfluous
Remaining back-pressure balance device further includes that the lower limit gear moved down on the valve rod for limiting the guide ring is arranged in
Block.
3. a kind of safety valve with redundancy back-pressure balance device according to claim 1, it is characterised in that: the pad
Block, the flap seat and the flap link into an integrated entity.
4. a kind of safety valve with redundancy back-pressure balance device according to claim 1, it is characterised in that: the peace
Full valve further includes the back pressure set that the intracorporal guide sleeve of the valve is arranged in, is pressed in the guide sleeve top, the flap
Seat, which can slide up and down to, to be arranged in the guide sleeve, and the bellows is located in the guide sleeve, and described leads
It is located in the back pressure set to ring.
5. a kind of safety valve with redundancy back-pressure balance device according to claim 1, it is characterised in that: the valve
It covers and offers connection valve cover cavity and external exhaust nozzle.
6. a kind of safety valve with redundancy back-pressure balance device according to claim 5, it is characterised in that: the row
Recovery tube is connected on tracheae mouth.
7. a kind of safety valve with redundancy back-pressure balance device according to claim 1, it is characterised in that: the valve
Valve has the first face cooperated with valve seat, the second face being connected with cushion block, and the middle part in first face protrudes to be formed
Diversion division is located on the outside of the diversion division on first face and offers surface groove, on the outside of the surface groove described in
The first face form the sealing surface described with valve base sealing cooperation, on the inside of the surface groove, on the outside of the diversion division described in
The first face have one section of planarea.
8. a kind of safety valve with redundancy back-pressure balance device according to claim 7, it is characterised in that: described is straight
Line face is generally aligned in the same plane with the sealing surface.
9. a kind of safety valve with redundancy back-pressure balance device according to claim 7, it is characterised in that: described leads
Stream portion has inclined surface, and the inclined surface is connected with the planarea by transition face.
10. a kind of safety valve with redundancy back-pressure balance device according to claim 7, it is characterised in that: described
It is provided with the interconnecting piece being connected with cushion block on second face, offers connecting hole on the interconnecting piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821172317.3U CN208417651U (en) | 2018-07-24 | 2018-07-24 | A kind of safety valve with redundancy back-pressure balance device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821172317.3U CN208417651U (en) | 2018-07-24 | 2018-07-24 | A kind of safety valve with redundancy back-pressure balance device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208417651U true CN208417651U (en) | 2019-01-22 |
Family
ID=65123865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821172317.3U Active CN208417651U (en) | 2018-07-24 | 2018-07-24 | A kind of safety valve with redundancy back-pressure balance device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208417651U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108662220A (en) * | 2018-07-24 | 2018-10-16 | 吴江市东吴机械有限责任公司 | A kind of safety valve with redundancy back-pressure balance device |
-
2018
- 2018-07-24 CN CN201821172317.3U patent/CN208417651U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108662220A (en) * | 2018-07-24 | 2018-10-16 | 吴江市东吴机械有限责任公司 | A kind of safety valve with redundancy back-pressure balance device |
| CN108662220B (en) * | 2018-07-24 | 2024-05-10 | 吴江市东吴机械有限责任公司 | Safety valve with redundant back pressure balancing device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208417651U (en) | A kind of safety valve with redundancy back-pressure balance device | |
| CN108662220A (en) | A kind of safety valve with redundancy back-pressure balance device | |
| CN101943283A (en) | Dual-use vacuum relief valve | |
| CN208605683U (en) | The check-valves and water system of regulating flow quantity | |
| CN209245357U (en) | Shut off control valve | |
| CN204573226U (en) | A kind of main steam safety valve | |
| CN210623581U (en) | Stop valve | |
| CN208090009U (en) | A kind of novel cross flow check valve | |
| CN208579004U (en) | A kind of slow-closure type valve on exhaust valve | |
| CN208967110U (en) | The adjustable push type motor-car faucet of water discharging time | |
| CN207393983U (en) | A kind of high pressure self-tightening type shut-off valve for reverse direction flow medium | |
| CN218207996U (en) | High-pressure overflow valve | |
| CN212251348U (en) | Straight-through control regulator for oil extraction | |
| CN108692075A (en) | High-performance spring Fall lift safety valve | |
| CN208397326U (en) | Pilot-operated type lets out nitrogen valve | |
| CN211039819U (en) | Full-guiding check valve | |
| CN220600560U (en) | Dustproof spring type safety valve | |
| CN201326783Y (en) | Pneumatic double-adjusting fuel gas valve | |
| CN219911893U (en) | Back pressure balance type pressure relief valve | |
| CN205654530U (en) | Novel cone valve subassembly | |
| CN218582246U (en) | Efficient solenoid valve body structure | |
| CN210153222U (en) | Double-seat control valve capable of offsetting unbalanced force | |
| CN207864749U (en) | Hand reversal valve | |
| CN213575788U (en) | High-temperature-prevention exhaust valve | |
| CN209164718U (en) | A kind of dedicated oxygen valve of diving |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |