CN110388503A - The packing seal structure and its application method of valve used in delayed coking unit - Google Patents
The packing seal structure and its application method of valve used in delayed coking unit Download PDFInfo
- Publication number
- CN110388503A CN110388503A CN201810340416.6A CN201810340416A CN110388503A CN 110388503 A CN110388503 A CN 110388503A CN 201810340416 A CN201810340416 A CN 201810340416A CN 110388503 A CN110388503 A CN 110388503A
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- China
- Prior art keywords
- filler
- spare
- work
- valve
- valve rod
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- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
- F16K41/04—Spindle sealings with stuffing-box ; Sealing rings with at least one ring of rubber or like material between spindle and housing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
- F16K41/06—Spindle sealings with stuffing-box ; Sealing rings with at least one ring attached to both spindle and housing
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a kind of packing seal structure of valve used in delayed coking unit and its application methods.Packing seal structure includes the work filler (7) in stuffing-box, and work filler is divided into two sections by axial along valve rod (11), is equipped with spring (8) between two sections of work fillers.Spare filler (10) and spacer ring (5) are equipped between work filler and the closed end of stuffing-box, spacer ring is between work filler and spare filler.Spare filler is divided into two sections by axial along valve rod, is equipped with liquid filler injection ring (12) between two sections of spare fillers, liquid filler injection ring is connected with the outlet of liquid filler injection channel (90).Valve rod is passed through from the center of work filler, spare filler, spacer ring and liquid filler injection ring.The invention discloses the application methods of the packing seal structure of valve used in the delayed coking unit.Present invention is mainly used for the two-way valves and four-way valve in oil plant delayed coking unit.
Description
Technical field
The present invention relates to a kind of packing seal structure of valve used in delayed coking unit and its application methods.
Background technique
In oil plant delayed coking unit, feed entrance point and charging junction before every two coke drums are generally required
Two two logical charging isolating valve,s of installation and a charging four-way valve, for the high temperature resid feed from upstream, (temperature to be general
It is 500~550 DEG C) switch and feed switched operation are carried out, it is allowed to alternatively enter two coke drums.Thus make a coke
Tower another coke drum in green coke is in decoking state, to guarantee delayed coking unit continuous production.In addition, in every two cokes
The oil gas vent of charcoal tower generally also needs to install two two logical oil gas isolating valve,s, two two logical oil gas blow valves and an oil gas
Ring valve.Above-mentioned two-way valve and four-way valve generallys use packing seal, and filler is generally the common substance filling-material structure of ring shape,
Valve rod around valve is set in stuffing-box, is installed in series and is compressed with gland.Filler is compressed along the axial direction of valve rod, generates edge
The plastic deformation of valve rod radial direction realizes sealing.This sealing means are primarily present following two problem.(1) diameter that filler is formed
It is usually non-uniform along the distribution of valve rod axial direction to pressing force.The axial pressing force that is subject to of filler enclosed close to gland 2~3 compared with
Greatly, the radial plastic deformation amount of generation is larger, and the radial compacting force of filler and frictional force between valve rod are excessive；Although can
To realize sealing, but it be easy to cause the wear damage of valve rod and filler.And the axial compression that each circle filler far from gland is subject to
Power is smaller, and the radial plastic deformation amount and radial compacting force of generation are smaller, can not achieve reliable sealing.(2) when filler loses
When effect causes valve medium (i.e. high temperature resid feed) leakage to need replacing, for two-way valve, it is high to generally require cutting upstream and downstream
Warm resid feed, operation temperature and pressure are down to normal temperature and pressure, even interruption delay coking plant production operation could be replaced
Filler.For four-way valve, then must the production operation of interruption delay coking plant could replace filler.After filler is installed, it is also necessary to
Again increasing temperature and pressure, operation of resuming production.This will seriously affect the production efficiency of delayed coking unit, bring not to production operation
Just.
Summary of the invention
The object of the present invention is to provide a kind of packing seal structure of valve used in delayed coking unit and its application method,
Caused ask is unevenly distributed to solve filler radial compacting force present in existing packing seal structure along valve rod axial direction
The problem of influencing normal production operation when topic and replacement filler.
To solve the above problems, the technical solution adopted by the present invention is that: a kind of filler of valve used in delayed coking unit
Sealing structure, including work filler, work filler are set in stuffing-box, are compressed with gland, and valve rod is worn from the center of work filler
It crosses, it is characterised in that: work filler is divided into two sections by axial along valve rod, is equipped with spring between two sections of work fillers, is being worked
Spare filler and spacer ring are equipped between filler and the closed end of stuffing-box, spacer ring is between work filler and spare filler, edge
Spare filler is divided into two sections by the axial of valve rod, and liquid filler injection ring, liquid filler injection are equipped between two sections of spare fillers
Ring is connected with the outlet of liquid filler injection channel set on valve deck, and valve rod is infused from spare filler, spacer ring and liquid filler
The center for entering ring passes through.
The application method of the packing seal structure of valve used in above-mentioned delayed coking unit, it is characterised in that: gland compresses
One section of work filler being in contact with it, spring are in compressive state along the axial direction of valve rod, and the one section of work not contacted with gland is filled out
Material, is compressed between spring and spacer ring.
Using the present invention, have following the utility model has the advantages that (1) is in valve normal operating, gland, which compresses, to be in contact with it
One section of work filler, spring are in compressive state along the axial direction of valve rod.Pass through the effect of compressed spring elastic force, two sections of work fillers
It is compacted.Two sections of work fillers can be acted on by the axial pressing force of close size, generate similar radial plastic deformation amount.
Therefore, two sections of work fillers are relatively uniform along the distribution of valve rod axial direction to the radial compacting force of valve rod and stuffing-box side wall, can put down
Sealing function is played, being unevenly distributed along valve rod axial direction of filler radial compacting force existing for existing packing seal structure is solved
Problem caused by even, can extend work filler service life, be able to achieve reliable sealing again.(2) in valve normal operating
When, spare filler pine covers on valve rod, does not compress.When the filler failure that works causes valve dielectric leakage to need replacing, warp
Liquid filler injection channel and liquid filler injection ring inject liquid filler, and liquid filler enters spare filler medial surface and valve rod
The gap between gap and spare filler lateral surface and stuffing-box side wall between surface, and from above-mentioned two gap along spare
Filler radially into spare filler, fill up the gap of spare filler.Liquid filler fills up above-mentioned two gap and enriches and press
Tight spare filler, is formed together new sealing structure with spare filler after cured, plays sealing function.In this way, valve just
Under normal mode of operation, so that it may realize online leak stopping, easily more change jobs filler online.Valve used in delayed coking unit is adopted
With the solution of the present invention, cutting high temperature resid feed, decrease temperature and pressure, interruption production operation can be avoided to wait when replacing filler
Journey does not influence the production efficiency of delayed coking unit, and delayed coking unit is made to be able to maintain normal continuous production operation.
Present invention is mainly used for the two-way valves and four-way valve in oil plant delayed coking unit.
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.Attached drawing and specific embodiment party
Formula is not intended to limit the scope of protection of present invention.
Detailed description of the invention
Fig. 1 is the schematic diagram of the packing seal structure of valve used in delayed coking unit of the present invention.
Specific embodiment
Referring to Fig. 1, the packing seal structure (referred to as packing seal structure) of valve used in delayed coking unit of the present invention
Including the filler 7 that works, work filler 7 is set in stuffing-box, is compressed with gland 6.Stuffing-box is an integral structure with valve deck 3, valve
Bar 11 is passed through from the center opening on stuffing-box and valve deck 3.The top connecting valve executing agency of valve rod 11, lower part is extend into
Be connected (figure omits) in the inner cavity of valve body 1, with spool.Being divided to work filler 7 along the axial direction of valve rod 11 is two sections, two sections of work fillers
Spring 8 is equipped between 7.Spare filler 10 and spacer ring 5 are equipped between work filler 7 and the closed end of stuffing-box, spacer ring 5 is located at
It works between filler 7 and spare filler 10.Along valve rod 11 axial, to be divided to spare filler 10 be two sections, two sections of spare fillers 10 it
Between be equipped with liquid filler injection ring 12.Set liquid filler injection channel 90 goes out on liquid filler injection ring 12 and valve deck 3
Mouth is connected, and the entrance of liquid filler injection channel 90 is connected with liquid filler injection pipe 9.Work filler 7 is filled out by several circle work
Expect that the axial series along valve rod 11 form, spare filler 10 is made of several spare fillers of circle along the axial series of valve rod 11.Often
It encloses work filler and spare filler and spacer ring 5, liquid filler injection ring 12 and spring base 80 described below is annulus
Shape is installed in series on valve rod 11, and valve rod 11 is passed through from their center.
The outside of spacer ring 5 has annular groove, end being radially into this along spacer ring 5 of the bolt on valve deck 3
In groove, spacer ring 5 is positioned in the axial direction of valve rod 11.It is recessed that the outside of liquid filler injection ring 12 has annular with inside
Slot, two annular grooves are connected to by several radial holes；The annular groove and liquid filler in 12 outside of liquid filler injection ring
The outlet of injection channel 90.
The both ends of spring 8 are respectively equipped with spring base 80.Spring base 80 has toroidal cavity, for placing the end of spring 8
Portion.The most commonly used is following several for spring 8: 1. 4~8 cylindrical helical springs, 11 outside (referring to Fig. 1) of valve rod is set to, in circle
It is uniformly distributed in circumferential direction.2. 1 cylindrical helical spring, valve rod 11 pass through inside it.3. 1 cylindrical bellows bullet
Spring, valve rod 11 pass through inside it.4. disk spring, valve rod 11 is passed through from its inner hole.Disk spring, and can either single
Be it is multiple, formed along the axial series of valve rod 11.The attached drawing of 3 kinds of springs omits afterwards.It is acted on above-mentioned spring identical other
The spring of type, also can be used.Spring should be capable of withstanding 500~550 DEG C of high temperature.
Each section of work filler 7 typically contains 2~4 circles work filler (Fig. 1 show 3 circles).Each section of spare filler 10
Typically contain 2~4 spare fillers of circle；Shown in Fig. 1, one section of spare filler 10 contains the 3 spare fillers of circle, another section of spare filler 10
Contain the 4 spare fillers of circle.The material of work filler 7 is generally soft graphite, and the material of spare filler 10 is generally oil immersion asbestos
Packing.
The valve deck 3 of valve used in delayed coking unit (referred to as valve) is equipped with the first steam channel 20, the first steam
The entrance in channel 20 is connected with steam blowing adapter tube 2, and outlet is outside stuffing-box closed end, the center opening side wall of valve deck 3
On.The second steam channel 21, the outlet and the inner cavity phase of valve body 1 of the second steam channel 21 are also separated from the first steam channel 20
It is logical.In Fig. 1, appended drawing reference 4 indicates the bracket 4 being set in valve deck 3.
In valve normal operating, gland 6 compresses one section of work filler 7 being in contact with it, and section work filler 7 generates position
Compressed spring 8 is moved, spring 8 is made to be in compressive state along the axial direction of valve rod 11.The one section of work filler not contacted with gland 6, In
It is compressed between spring 8 and spacer ring 5.By the effect of 8 elastic force of compressed spring, two sections of work fillers are compacted.Two sections of work are filled out
Material can be acted on by the axial pressing force of close size, generate similar radial plastic deformation amount.Therefore, two sections of work fillers
It is relatively uniform along the axial distribution of valve rod 11 to the radial compacting force of valve rod 11 and stuffing-box side wall, it can fifty-fifty play sealing and make
With.
In valve normal operating, spare 10 pine of filler covers on valve rod 11, does not compress.When the work failure of filler 7 is made
When being needed replacing at valve dielectric leakage, using high pressure injection gun through liquid filler injection pipe 9, liquid filler injection channel 90 to
The annular groove in 12 outside of liquid filler injection ring injects liquid filler, and it is recessed that liquid filler enters interior annular through radial hole again
Slot.Liquid filler in two annular grooves enters the gap between spare 10 medial surface of filler and 11 surface of valve rod and spare
Gap between 10 lateral surface of filler and stuffing-box side wall, and from above-mentioned two gap along spare filler 10 radially into spare
Filler 10, the gap for filling up spare filler 10.Liquid filler fills up above-mentioned two gap and enriches and compress spare filler 10, to
New sealing structure is formed together with spare filler 10 after solidification, plays sealing function, thus plugs letting out for valve medium
Leakage.Lower cover 6 is unloaded later, and the work filler of failure is taken out from stuffing-box, spring 8 and spring base 80 is taken out and is packed into new work
Make filler, be packed into spring 8 and spring base 80, refills upper press cover 6, compresses work filler.The above process realize online leak stopping with
And the online replacement to work filler.Later, valve restores normal handover operation, and the intensity of cured liquid filler is not enough to
Prevent the rotation of valve rod 11.
Liquid filler is usually existing high temperature filler type injecting sealant or heat curing type injecting sealant, is generally using temperature
500~550 DEG C.Valve is observed when injecting liquid filler, when observing no valve dielectric leakage, stop injection
Liquid filler.
Using the present invention program valve in operation, through steam blowing adapter tube 2, the first steam channel 20 to valve deck
Gap between 11 side wall of 3 center opening side walls and valve rod is passed through purge steam (water vapour), can effectively prevent coke powder etc. solid
Body particle enters in stuffing-box from stuffing-box closed end, influences the sealing of work filler 7 and spare filler 10 and liquid filler
Effect.The inner cavity of valve body 1 can also be entered from the second steam channel 21 by purging steam, to solid particles such as coke powders in the inner cavity
It is purged.
Claims (5)
1. a kind of packing seal structure of valve used in delayed coking unit, including work filler (7), work filler (7) are set to
It in stuffing-box, is compressed with gland (6), valve rod (11) is passed through from the center of work filler (7), it is characterised in that: along valve rod (11)
It is axial work filler (7) is divided into two sections, be equipped with spring (8) between two sections of work fillers (7), work filler (7) with fill out
Expect to be equipped with spare filler (10) and spacer ring (5) between the closed end of letter, spacer ring (5) is located at work filler (7) and spare filler
(10) between, spare filler (10) is divided into two sections by axial along valve rod (11), is equipped with liquid between two sections of spare fillers (10)
Filler injection ring (12), the outlet of liquid filler injection ring (12) and liquid filler injection channel (90) set on valve deck (3)
It is connected, valve rod (11) is passed through from the center of spare filler (10), spacer ring (5) and liquid filler injection ring (12).
2. packing seal structure according to claim 1, it is characterised in that: each section of work filler (7) contains 2~4 circles
Work filler, and each section of spare filler (10) contains 2~4 spare fillers of circle.
3. packing seal structure according to claim 1 or 2, it is characterised in that: the valve deck (3) of valve is equipped with first and steams
Vapour channel (20), the outlet of the first steam channel (20) is located at outside stuffing-box closed end, the center opening side wall of valve deck (3)
On.
4. the application method of the packing seal structure of valve used in delayed coking unit described in claim 1, it is characterised in that: pressure
Lid (6) compresses one section of work filler (7) being in contact with it, and spring (8) is in compressive state along the axial direction of valve rod (11), not with pressure
One section of work filler for covering (6) contact, is compressed between spring (8) and spacer ring (5).
5. according to the method described in claim 4, it is characterized by: when work filler (7) failure causes valve dielectric leakage to need
When replacing, liquid filler is injected through liquid filler injection channel (90) and filler injection ring (12), liquid filler enters spare
Between gap and spare filler (10) lateral surface and stuffing-box side wall between filler (10) medial surface and valve rod (11) surface
Gap, and from above-mentioned two gap along spare filler (10) radially into spare filler (10), fill up spare filler (10)
Gap, with spare filler 10 play sealing function together after liquid filler solidification, unload lower cover 6 later, taken from stuffing-box
The work filler that fails out is simultaneously packed into new work filler, refills upper press cover (6), compresses work filler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810340416.6A CN110388503A (en) | 2018-04-17 | 2018-04-17 | The packing seal structure and its application method of valve used in delayed coking unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810340416.6A CN110388503A (en) | 2018-04-17 | 2018-04-17 | The packing seal structure and its application method of valve used in delayed coking unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110388503A true CN110388503A (en) | 2019-10-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810340416.6A Pending CN110388503A (en) | 2018-04-17 | 2018-04-17 | The packing seal structure and its application method of valve used in delayed coking unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110388503A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112747121A (en) * | 2019-10-30 | 2021-05-04 | 中石化广州工程有限公司 | Sealing structure of gate valve type bottom cover machine and operation method thereof |
| CN113639092A (en) * | 2021-08-31 | 2021-11-12 | 德维阀门铸造（苏州）股份有限公司 | Valve rod sealing structure |
| CN114396507A (en) * | 2022-01-14 | 2022-04-26 | 重庆川仪调节阀有限公司 | Device and method for conducting filler plugging by using magnetic fluid |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4899899A (en) * | 1989-06-21 | 1990-02-13 | Triten Corporation | Pressure vessel |
| CN201547387U (en) * | 2009-12-14 | 2010-08-11 | 兰州高压阀门有限公司 | Control gate valve for delaying coking sequence |
| CN202203431U (en) * | 2011-08-01 | 2012-04-25 | 上海开维喜阀门集团有限公司 | Anti-coking ball valve |
| CN202451958U (en) * | 2011-12-30 | 2012-09-26 | 苏州德兰能源科技有限公司 | Filler pre-tightening mechanism of valve |
| CN202510830U (en) * | 2012-03-22 | 2012-10-31 | 意本阀门有限公司 | Valve packing device capable of compensating in middle |
| CN203784373U (en) * | 2014-03-18 | 2014-08-20 | 洛阳三旋特种阀门有限公司 | High-temperature four-way ball valve |
-
2018
- 2018-04-17 CN CN201810340416.6A patent/CN110388503A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4899899A (en) * | 1989-06-21 | 1990-02-13 | Triten Corporation | Pressure vessel |
| CN201547387U (en) * | 2009-12-14 | 2010-08-11 | 兰州高压阀门有限公司 | Control gate valve for delaying coking sequence |
| CN202203431U (en) * | 2011-08-01 | 2012-04-25 | 上海开维喜阀门集团有限公司 | Anti-coking ball valve |
| CN202451958U (en) * | 2011-12-30 | 2012-09-26 | 苏州德兰能源科技有限公司 | Filler pre-tightening mechanism of valve |
| CN202510830U (en) * | 2012-03-22 | 2012-10-31 | 意本阀门有限公司 | Valve packing device capable of compensating in middle |
| CN203784373U (en) * | 2014-03-18 | 2014-08-20 | 洛阳三旋特种阀门有限公司 | High-temperature four-way ball valve |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112747121A (en) * | 2019-10-30 | 2021-05-04 | 中石化广州工程有限公司 | Sealing structure of gate valve type bottom cover machine and operation method thereof |
| CN113639092A (en) * | 2021-08-31 | 2021-11-12 | 德维阀门铸造（苏州）股份有限公司 | Valve rod sealing structure |
| CN114396507A (en) * | 2022-01-14 | 2022-04-26 | 重庆川仪调节阀有限公司 | Device and method for conducting filler plugging by using magnetic fluid |
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Application publication date: 20191029 |
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