CN209067858U - A kind of valve sealing mechanism and the high temperature butterfly valve containing the mechanism - Google Patents
A kind of valve sealing mechanism and the high temperature butterfly valve containing the mechanism Download PDFInfo
- Publication number
- CN209067858U CN209067858U CN201821965067.9U CN201821965067U CN209067858U CN 209067858 U CN209067858 U CN 209067858U CN 201821965067 U CN201821965067 U CN 201821965067U CN 209067858 U CN209067858 U CN 209067858U
- Authority
- CN
- China
- Prior art keywords
- valve
- high temperature
- filler
- packing layer
- valve body
- 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
- Lift Valve (AREA)
- Details Of Valves (AREA)
Abstract
The utility model discloses a kind of valve sealing mechanism and containing the high temperature butterfly valve of the mechanism, which includes the filler being arranged between valve rod and valve body, further includes high pressure gas conveying mechanism and the filler spacer being arranged between valve rod and valve body；The filler includes the first packing layer and the second packing layer being spaced apart, between first packing layer and second packing layer, the gas outlet of the high pressure gas conveying mechanism is connected to the filler spacer with the space between first packing layer and second packing layer between valve rod and valve body.The utility model valve sealing mechanism can balance existing pressure difference between filler, to reduce the medium possibility excessive by stuffing-box, achieve the purpose that low loss, realize better seal effect by being passed through the air (or nitrogen) higher than pressure medium.
Description
Technical field
The utility model relates to valve fields, relate in particular to a kind of valve sealing mechanism and the height containing the mechanism
Warm butterfly valve.
Background technique
The butterfly valve of worst hot case in petrochemical equipment and smelting device using more, with the enlargement design and ring of device
The enhancing for protecting consciousness has higher leakage requirement, traditional filler to its stuffing-box containing the butterfly valve under poisonous medium operating condition
Letter is unable to satisfy its requirement.
Currently, the prior art faces worst hot case, the mode selected substantially is exactly unlimited lengthening bonnet, by stuffing-box original
High-temperature medium is managed, is saved the nation in this way by curve, can extend the service life of stuffing-box to a certain extent, but conventional graphite
Stuffing-box, the carbon in high temperature Strong oxdiative occasion, graphite are oxidized easily, and are formed carbon black, are led to sealing failure of fillers, such as
There is toxic component in medium, be diffused into the surrounding air of device, will seriously affect the staff of surrounding, reduces air matter
Amount.
Utility model content
The technical problem to be solved by the utility model is to provide existing pressure differences between a kind of balance filler, realize more preferable
Sealing effect using pressure-air assist valve sealing mechanism and contain the high temperature butterfly valve of the mechanism.
In order to solve the above-mentioned technical problem, the utility model adopts the following technical solution: a kind of valve sealing mechanism, including
Filler between valve rod and valve body is set, further includes high pressure gas conveying mechanism and setting between valve rod and valve body
Filler spacer；
The filler includes the first packing layer and the second packing layer being spaced apart, and the filler spacer is located at described first
Position between packing layer and second packing layer, between the gas outlet and valve rod and valve body of the high pressure gas conveying mechanism
Space connection between first packing layer and second packing layer.
Further, more than one venthole is provided on the filler spacer.
Further, the venthole radially extending along the valve rod.
Further, the cross section of the filler spacer is in I-shaped.
Further, first packing layer is located at the inside of second packing layer, and first packing layer includes resistance to
High temperature filler A and high temperature resistant filler B, the high temperature resistant filler A are located at the inside of the high temperature resistant filler B, and the high temperature resistant is filled out
Expect that the high temperature resistance of A is better than the high temperature resistance of the high temperature resistant filler B, the sealing performance of the high temperature resistant filler B is better than
The sealing performance of the high temperature resistant filler A.
Further, second packing layer is located at the outside of first packing layer, and second packing layer is flexibility
Graphite packing.
Further, the high pressure gas conveying mechanism include be provided on valve body between valve rod and valve body
The air flue of space connection between first packing layer and second packing layer and the gas being connected to the air flue
Pipe.
Further, the high pressure gas conveying mechanism further includes the filtering pressure reducing valve being arranged on the tracheae.
A kind of high temperature butterfly valve, including valve body, valve rod, valve plate, the valve body include valve body and are connected to institute
The bonnet, and bottom flange of the top and bottom of valve body are stated, the valve rod passes through the upper and lower ends point of the valve body and the valve rod
It does not penetrate in the bonnet, and the bottom flange, the valve plate is located in the valve body and connect with the valve rod, the valve
The valve sealing mechanism is equipped between bar and the bonnet, and the bottom flange.
Further, the bonnet, and the equal extension design of the bottom flange and outer surface is provided with cooling fin.
Further, the top of the bonnet, and the bottom of the bottom flange are equipped with external rolling bearing units, the valve
The upper and lower ends of bar are connect with the corresponding external rolling bearing units respectively.
The utility model has the following beneficial effects:
The utility model valve sealing mechanism can by being passed through the air (or nitrogen) higher than pressure medium, balance filler it
Between existing pressure difference achieve the purpose that low loss to reduce medium by the excessive possibility of stuffing-box, realize better seal
Effect, the utility model high temperature butterfly valve can be used for poisonous medium, prevent poisonous medium from spilling into air.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of an embodiment of the present invention valve sealing mechanism.
Fig. 2 is the schematic perspective view of filler spacer in an embodiment of the present invention.
Fig. 3 is the cross-sectional view of filler spacer in an embodiment of the present invention.
Fig. 4 is the structural schematic diagram of an embodiment of the present invention high temperature butterfly valve.
The label of each component in attached drawing are as follows: 1 valve rod, 2 valve plates, 3 valve bodies, 4 bonnet,s, 41 air flues, 5 bottom flanges, 6 fillers every
Set, 61 ventholes, 7 high temperature resistant filler A, 8 high temperature resistant filler B, 9 second packing layers, 10 tracheaes, 11 filtering pressure reducing valves, 12 heat dissipations
Piece, 13 external rolling bearing units, 14 glands, 15 hold-down grids.
Specific embodiment
It is described in detail the utility model below with reference to the accompanying drawings.It should be noted that in the absence of conflict, this Shen
Please in embodiment and embodiment in feature can be combined with each other.
Referring to Fig. 1 to Fig. 3.
The valve sealing mechanism of the utility model further includes high pressure including the filler being arranged between valve rod 1 and valve body
Gas transportation machine structure and the filler spacer 6 being arranged between valve rod 1 and valve body；
The filler includes the first packing layer being spaced apart and the second packing layer 9, and the filler spacer 6 is located at described the
Between one packing layer and second packing layer 9, between the gas outlet and valve rod 1 and valve body of the high pressure gas conveying mechanism
Between first packing layer and second packing layer 9 space connection.
Here valve body is the component being trapped among outside valve rod, can be the portions such as valve body, valve deck, support frame in general sense
Part.Fig. 1 illustrate when valve rod and the bonnet, 4 of butterfly valve between using pressure-air assist valve sealing mechanism the case where.
In the utility model, filler spacer guarantees sky between the two for separating the first packing layer and the second packing layer
Between be not compressed, pressure-air efficiently acts against filler end up and down, and high pressure gas conveying mechanism is then used for high pressure gas
It is sent into the space between the first packing layer and the second packing layer between valve rod and valve body, the sealing of the utility model is former
It manages as follows:
In normal work, the filler in stuffing-box is in impaction state, is able to achieve effective sealing, but mostly
Number filler is suppressed by fine and close sealing material, and in the entire system, the pressure medium inside stuffing-box is such as higher than the external world
Atmospheric pressure, then the air molecule in medium will slowly be infiltrated into extraneous big by filler gap there is pressure difference at stuffing-box
Gas, to a certain extent such as this infiltration accumulation, it will the range beyond permission pollutes the air around equipment, and adds
After upper pressure-air auxiliary, the air (or nitrogen) higher than pressure medium can be passed through where filler spacer in space, balance is filled out
Existing pressure difference between material achievees the purpose that low loss to reduce the medium possibility excessive by stuffing-box, realizes better
Sealing effect.
Operating condition and application note:
Such operating condition is usually that operating pressure is low, and near the high boiler plant of temperature or reactor is nearby used for fuel tune
The occasion that section or flue gas are adjusted, routine work pressure are generally less than 0.2Mpa, and operating temperature is generally greater than 500 DEG C, in medium
Contain strong oxidizer, toxic gas (SO2/SO3/ CO etc.), conventional design is such as used, the toxic gas around equipment will exceed
Standard allowed band damages the operator's health of device.
In specific implementation, gland 14 that the prior art uses can be used and hold-down grid 15 compresses filler.
In one embodiment, more than one venthole 61 is provided on the filler spacer 6.Venthole is for keeping high pressure empty
Gas is filled in the end of two groups of fillers, effectively the pressure difference between balance media and filler.
In one embodiment, the radially extending along the valve rod 1 of venthole 61.It designs in this way, the diameter of filler spacer
Can be with gassy to two sides, the more effectively pressure difference between balance media and filler.
In one embodiment, the cross section of the filler spacer 6 is in I-shaped.In this way design, the top surface of filler spacer and
Bottom surface can provide biggish supporting surface, so that steadily the first packing layer and the second packing layer are supported and are separated, and in
Between part can then open up venthole, so that pressure-air is filled in the end of two groups of fillers, effectively balance media and filler
Between pressure difference, achieve the purpose that air auxiliary seal.
In one embodiment, first packing layer is located at the inside of second packing layer 9, the first packing layer packet
High temperature resistant filler A7 and high temperature resistant filler B8 are included, the high temperature resistant filler A7 is located at the inside of the high temperature resistant filler B8, described
The high temperature resistance of high temperature resistant filler A7 is better than the high temperature resistance of the high temperature resistant filler B8, and the high temperature resistant filler B8's is close
Sealing property is better than the sealing performance of the high temperature resistant filler A7.
The utility model uses combined stuffing in inside, and the high temperature resistant filler A main component close to medium is mica, resistance to
High-temperature behavior and oxidation resistent susceptibility are stronger, can long-term work in high temperature Strong oxdiative operating condition, but its sealing performance is poor, can not
Realize low loss requirement, act as the heat-insulated effect of thermal insulation, and on the outside, arrange one group for sealing high temperature resistant filler
B has preferable sealing performance relative to high temperature resistant filler A, can seal poisonous medium under this stuffing-box.
It is designed using the stuffing-box of combined stuffing and pressure-air auxiliary seal, it is close to solve stuffing-box under worst hot case
Problem is sealed, while effectively reducing the excessive possibility of toxic medium.
In one embodiment, second packing layer 9 is located at the outside of first packing layer, second packing layer 9
For flexible graphite packing, low loss requirement can satisfy, carry out Redundancy Design, improve security performance.
In one embodiment, the high pressure gas conveying mechanism include be provided on valve body with valve rod 1 and valve body
Between between first packing layer and second packing layer 9 space connection air flue 41 and with the air flue
The tracheae 10 of 41 connections.It designs in this way, structure is simple, rationally, is easy to implement.
In one embodiment, the high pressure gas conveying mechanism further includes the filtering pressure reducing valve being arranged on the tracheae 10
11.Filtering pressure reducing valve is used to control the degree of purity and pressure of the gas of auxiliary seal.
Referring to fig. 4, it is described in more detail below the structure of the high temperature butterfly valve containing above-mentioned sealing mechanism:
A kind of high temperature butterfly valve, including valve body, valve rod 1, valve plate 2, the valve body include valve body 3 and are connected to
The bonnet, 4 and bottom flange 5 of the top and bottom of the valve body 3, the valve rod 1 pass through the upper of the valve body 3 and the valve rod 1
Lower both ends respectively penetrate in the bonnet, 4 and the bottom flange 5, the valve plate 2 be located in the valve body 3 and with the valve rod
1 connection, is equipped with the valve sealing mechanism between the valve rod 1 and the bonnet, 4 and the bottom flange 5.
In one embodiment, the bonnet, 4 and the equal extension design of the bottom flange 5 and outer surface is provided with cooling fin
12.Conventional graphite packing, heat-resisting ability is limited, generally uses to 425 DEG C or so, if temperature is more than this boundary, increases
It is filled the distance between with medium, valve deck extension design can increase by filler far from medium, while on the valve deck of lengthening
For fanning the heat radiating fin structure of heat, the rate of heat exchange of valve body or valve deck and surrounding air can be accelerated, medium is reduced and pass through
Valve body/valve deck is transmitted to the heat at stuffing-box, while reducing the temperature at stuffing-box, and stuffing-box is enable to prolong lesser
Reach reliable operating temperature in length.
Using the cooperation for the valve deck design and combined stuffing for lengthening fin type, solves flexible graphite packing in high temperature
Service life is low under medium, the bad disadvantage of sealing effect.
In one embodiment, the top of the bonnet, 4 and the bottom of the bottom flange 5 are equipped with external rolling bearing units
13, the upper and lower ends of the valve rod 1 are connect with the corresponding external rolling bearing units 13 respectively.Bearing belongs to mechanical drive shaft more
Accurate one of part, high transmission accuracy, gap is small, but its working performance be influenced by temperature it is larger, especially with
On high temperature valve, because the thermal expansion coefficient of the uniform material of uneven heating is inconsistent, it is easy to cause bearing at high operating temperatures
Stuck, the utility model does above-mentioned design, and the bearing for being originally arranged at valve plate or more shaft end has been arranged into above filler, separate
High-temperature medium reduces its operating temperature, guarantees the normal operation of bearing, improves the integral working of valve.
In the casting of pressure vessel, bigbore thin-walled parts are always industry problems, for the flue gas system of high temperature
And the butterfly valve used in heat treatment system, most of is all heavy caliber low-load, that means that valve aperture is big, pressure rating
It is lower, cause valve body wall thickness relatively thin, traditional casting qualification rate is lower, higher cost.For this purpose, the utility model is by valve body and valve
Plate uses the form of plate welding, improves the process difficulties of large-diameter butterfly valve casting, changes the application limitation of such valve,
Manufacturing cost is greatly lowered, has reached preferable economic benefit.
It should be understood that example as described herein and embodiment are not intended to limit the utility model only for explanation, this
Field technical staff can make various modifications or variation according to it, within the spirit and principle of the utility model, made
Any modification, equivalent substitution, improvement and etc. should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of valve sealing mechanism, including the filler being arranged between valve rod and valve body, it is characterised in that: further include high pressure
Gas transportation machine structure and the filler spacer being arranged between valve rod and valve body；
The filler includes the first packing layer and the second packing layer being spaced apart, and the filler spacer is located at first filler
Between layer and second packing layer, it is located at institute between the gas outlet and valve rod and valve body of the high pressure gas conveying mechanism
State the space connection between the first packing layer and second packing layer.
2. valve sealing mechanism as described in claim 1, it is characterised in that: be provided on the filler spacer more than one logical
Stomata.
3. valve sealing mechanism as claimed in claim 2, it is characterised in that: the venthole prolongs along the radial direction of the valve rod
It stretches.
4. the valve sealing mechanism as described in claims 1 or 2 or 3, it is characterised in that: the cross section of the filler spacer is in work
Font.
5. the valve sealing mechanism as described in claims 1 or 2 or 3, it is characterised in that: first packing layer is located at described the
The inside of two packing layers, first packing layer include high temperature resistant filler A and high temperature resistant filler B, and the high temperature resistant filler A is located at
The inside of the high temperature resistant filler B, the high temperature resistance of the high temperature resistant filler A are better than the high temperature resistant of the high temperature resistant filler B
Performance, the sealing performance of the high temperature resistant filler B are better than the sealing performance of the high temperature resistant filler A.
6. the valve sealing mechanism as described in claims 1 or 2 or 3, it is characterised in that: the high pressure gas conveying mechanism includes
Be provided on valve body between valve rod and valve body between first packing layer and second packing layer
The air flue of space connection and the tracheae being connected to the air flue.
7. valve sealing mechanism as claimed in claim 6, it is characterised in that: the high pressure gas conveying mechanism further includes setting
Filtering pressure reducing valve on the tracheae.
8. a kind of high temperature butterfly valve, including valve body, valve rod, valve plate, the valve body includes valve body and is connected to described
The bonnet, and bottom flange of the top and bottom of valve body, the valve rod pass through the upper and lower ends difference of the valve body and the valve rod
It penetrates in the bonnet, and the bottom flange, the valve plate is located in the valve body and connect with the valve rod, and feature exists
In: it is all provided between the valve rod and the bonnet, and the bottom flange and is used just like valve described in any one of claims 1 to 7
Sealing mechanism.
9. high temperature butterfly valve as claimed in claim 8, it is characterised in that: the bonnet, and the equal extension design of the bottom flange are simultaneously
Outer surface is provided with cooling fin.
10. high temperature butterfly valve as claimed in claim 8 or 9, it is characterised in that: the top of the bonnet, and the bottom flange
Bottom is equipped with external rolling bearing units, and the upper and lower ends of the valve rod are connect with the corresponding external rolling bearing units respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821965067.9U CN209067858U (en) | 2018-11-27 | 2018-11-27 | A kind of valve sealing mechanism and the high temperature butterfly valve containing the mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821965067.9U CN209067858U (en) | 2018-11-27 | 2018-11-27 | A kind of valve sealing mechanism and the high temperature butterfly valve containing the mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209067858U true CN209067858U (en) | 2019-07-05 |
Family
ID=67100499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821965067.9U Active CN209067858U (en) | 2018-11-27 | 2018-11-27 | A kind of valve sealing mechanism and the high temperature butterfly valve containing the mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209067858U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113374879A (en) * | 2021-06-23 | 2021-09-10 | 烟台艾沃环保科技有限公司 | Zero-leakage poppet valve for waste gas treatment equipment |
-
2018
- 2018-11-27 CN CN201821965067.9U patent/CN209067858U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113374879A (en) * | 2021-06-23 | 2021-09-10 | 烟台艾沃环保科技有限公司 | Zero-leakage poppet valve for waste gas treatment equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2946554A (en) | Butterfly valve | |
| CN201416725Y (en) | Isolated corrosion-proof metal corrugated pipe expansion joint | |
| CN209067858U (en) | A kind of valve sealing mechanism and the high temperature butterfly valve containing the mechanism | |
| CN102345742A (en) | Isolating valve sealed by structural ceramic valve clack and metal elastic valve seat | |
| US3383115A (en) | Gas seal for furnaces | |
| CN105546144A (en) | Expanding shut upper-mounted type ultralow temperature hard sealing fixing ball valve | |
| CN211145379U (en) | High-temperature flue gas butterfly valve and valve rod sealing structure thereof | |
| CN108775406A (en) | High-performance nano coating corrugated tube valve special for chlorine | |
| CN206361185U (en) | A kind of cryogenic ball valve | |
| CN103363117A (en) | Double end face machine seal | |
| CN201731215U (en) | Rectangular air duct rubber compensator | |
| CN101694260B (en) | Nonmetal compensator | |
| CN103148731A (en) | Improved tube type heat exchanger tube box | |
| CN206958305U (en) | A kind of high temperature regulation ball valve | |
| CN201513666U (en) | Non-metal compensator | |
| CN212672470U (en) | Double-elastic-lip floating ball valve | |
| CN107893890A (en) | Rubber expansion joint and pipeline | |
| CN209371769U (en) | Annular furnace heating radiation tube seal structure | |
| CN109058458B (en) | Chemical converter feeding seal structure | |
| CN213064659U (en) | Corrosion-resistant stainless steel fluorine-lined butterfly valve | |
| CN212318837U (en) | Heat-preservation jacket type ball valve | |
| CN213655759U (en) | Heat-resistant butterfly valve | |
| CN212954834U (en) | Flue flashboard device | |
| CN205978589U (en) | Low temperature ball valve | |
| CN206190926U (en) | A stainless steel ventilation butterfly valve for high temperature is 800 DEG C |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |