CN108223959A - For the tape-pressure leakage clogging device and method for blocking of root valve - Google Patents
For the tape-pressure leakage clogging device and method for blocking of root valve Download PDFInfo
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- CN108223959A CN108223959A CN201611153320.6A CN201611153320A CN108223959A CN 108223959 A CN108223959 A CN 108223959A CN 201611153320 A CN201611153320 A CN 201611153320A CN 108223959 A CN108223959 A CN 108223959A
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- ptfe
- polytetrafluoroethylene
- sleeve
- lower flange
- plug
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- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a kind of tape-pressure leakage clogging devices and blocking method for root valve, belong to pipeline stopping transportation pressure leakage stopping technology field.Wherein device includes：The lower flange (6) being set at the position that root valve body (2) is connected with pressure guiding pipe (3), the external sleeve (1) of root valve body (2) is set in, the lower end of sleeve (1) is along the circumferential direction provided with upper flange (4)；And the polytetrafluoroethylene (PTFE) plug (5) between sleeve (1) and root valve body (2), polytetrafluoroethylene (PTFE) plug (5) are interference fitted with sleeve (1)；Stop-leak compound coating is coated between sleeve (1) and polytetrafluoroethylene (PTFE) plug (5), between the outer surface of polytetrafluoroethylene (PTFE) plug (5) and root valve body (2).The apparatus structure is simple, simple operation, can carry out quick blocking to the leakage of root valve in the case of pipeline on-line production, and can achieve the effect that permanent No leakage.
Description
Technical field
The present invention relates to pipeline stopping transportation pressure leakage stopping technology fields, more particularly to a kind of pressure sealing for root valve
Device and method for blocking.
Background technology
Root valve is all kinds of common-use tunnels, the important valve on process pipe, and the bottom of root valve body passes through impulse
Pipe is connect with main pipeline.When root valve leaks, corresponding measure is taken in time, such as replaces new valve, to leak
Position blocks etc., to prevent in the dielectric leakage to ambient enviroment in pipeline.Replacing new valve needs to stop production, and during operation
Between it is long.In order to avoid stopping production, at present mostly using the method for the progress pressure sealing in conduit running come to the root leaked
Portion's valve is blocked.
Existing pressurized leaking stoppage method mainly includes steel band and tenses method, low pressure sticking method and agent injecting type encapsulating method
Deng.
Wherein, it is the placement rubber sheet gasket at leakage point that steel band, which tenses method, is then fixed rubber sheet gasket using steel band,
Leak stopping is carried out using the rubber sheet gasket.This method is suitable for the interim leak stopping of mesolow pipe leakage, since rubber sheet gasket is easy
Aging, steel band are easily influenced by factors such as outer force-disturbances, and the probability of this method leak stopping failure is larger, and only leans on steel band tensioning function
It is difficult to meet the requirement of mesohigh pipeline.
Low pressure glues benefit technology i.e. chemical bonding techniques, and this method is only applicable to the leak stopping under lower pressure, and existing each
Kind adhesive is not easy directly band pressure viscosity and mends, and needs specific guiding device to realize band pressure viscosity benefit.
The sealing cavity that fixture injecting glue method is formed using the outer surface of leakage position with fixture, stop-leak compound is injected and is full of
Sealing cavity, so as to prevent leaking for medium, plug leak.This method can be used for sealing the leakage of high temperature, pressure piping
It is stifled, but this method is needed using complicated stop-leak compound injection device, operating procedure is complicated, and blocking speed is slow.
In conclusion in the implementation of the present invention, the inventors discovered that having at least the following problems in the prior art：
Existing pressurized leaking stoppage method cannot meet that plugging effect is good, the activity duration is short, the requirements such as at low cost, easy to operate simultaneously.
Invention content
In order to solve the technical issues of above-mentioned, the present invention provide a kind of plugging effect is good, the activity duration is short, it is at low cost and
Tape-pressure leakage clogging device and method for blocking for root valve easy to operate.
Specifically, including following technical solution：
In a first aspect, the embodiment of the present invention provides a kind of tape-pressure leakage clogging device for root valve, including：
The lower flange being set at the position that root valve body is connected with pressure guiding pipe, the center of the lower flange have with
The through-hole that the shape at position that the root valve body is connected with pressure guiding pipe is adapted；
The sleeve being set in outside the root valve body, the hollow cylinder that the sleeve is opened in upper end closed, lower end
The bodily form, the lower end of the sleeve are along the circumferential direction provided with the upper flange for connecting the sleeve and the lower flange；
And
Polytetrafluoroethylene (PTFE) plug between the sleeve and the root valve body, the polytetrafluoroethylene (PTFE) plug with it is described
Sleeve is interference fitted；Between the sleeve and the polytetrafluoroethylene (PTFE) plug, the polytetrafluoroethylene (PTFE) plug and the root valve body
Outer surface between be coated with stop-leak compound coating.
Further, multiple connecting holes, the connecting hole of the upper flange are offered respectively on the upper flange and lower flange
It is correspondingly arranged with the connecting hole of the lower flange, the upper flange and the lower flange are bolted by first.
Further, the lower flange includes half lower flange a and half lower flange b；The half lower flange a and half laxative remedy
Blue b includes semicircular main body, is provided at both ends with engaging lug in the radial direction of the main body, is set on the engaging lug
There is connecting hole, the second bolt passes through the connecting hole on engaging lug to connect the half lower flange a with the half lower flange b；It is described
The center of half lower flange a and the half lower flange b are both provided at the position being connected with the root valve body with pressure guiding pipe
The groove that is adapted of shape.
Further, the polytetrafluoroethylene (PTFE) plug includes half plug a of polytetrafluoroethylene (PTFE) and polytetrafluoroethylene (PTFE) partly fills in b；It is described poly-
Tetrafluoroethene half fills in a and the polytetrafluoroethylene (PTFE) half fills in the equal semicirculars in shape of b, and fills in a and described poly- in the polytetrafluoroethylene (PTFE) half
Tetrafluoroethene half fills in the groove for being provided centrally with being adapted with the root valve body shape of b.
Further, gum-injecting port and exhaust outlet are additionally provided on the sleeve, the gum-injecting port and the exhaust outlet connect
It is connected to valve.
Further, the inner surface of the sleeve exists with the roughness in region that the polytetrafluoroethylene (PTFE) plug is in contact
Ra1.6 hereinafter, the roughness of the inner surface of the polytetrafluoroethylene (PTFE) plug in below Ra1.6；The inner surface of the lower end of the sleeve
And the edge of the upper surface of the polytetrafluoroethylene (PTFE) is machined with chamfering.
Further, the stop-leak compound is uncured stop-leak compound.
Second aspect, the embodiment of the present invention provide a kind of pressurized leaking stoppage method for root valve, the pressure sealing side
Method is implemented using the tape-pressure leakage clogging device described in first aspect of the embodiment of the present invention, includes the following steps：
By the lower flange at the position that the root valve body is connect with pressure guiding pipe；
Stop-leak compound is coated in the outer surface of the root valve valve outer surface and the polytetrafluoroethylene (PTFE) plug；
By the polytetrafluoroethylene (PTFE) plug sleeve on the root valve body；
The sleeve is sleeved on the polytetrafluoroethylene (PTFE) beyond the Great Wall, then the upper flange is connected with the lower flange.
Further, after the upper flange is connected with the lower flange, stop-leak compound is full of into the sleeve.
Further, the pressurized leaking stoppage method further includes：Table is carried out to the outer surface of tape-pressure leakage clogging device entirety
Surface treatment and preservative treatment.
The advantageous effect of technical solution provided in an embodiment of the present invention：
In tape-pressure leakage clogging device provided in an embodiment of the present invention, leakage point is coated on sleeve inner, and pass through polytetrafluoro
Interference fit and stop-leak compound coating between ethylene plug and sleeve form dual-seal.It is provided in an embodiment of the present invention with pressure stifled
Leakage device is simple in structure, simple operation, is not required to get angry, and the leakage of root valve can be carried out in the case of pipeline on-line production quick
It blocks, and can achieve the effect that permanent No leakage, while compressive resistance also disclosure satisfy that the design strength requirement of pipeline.
Tape-pressure leakage clogging device provided in an embodiment of the present invention is light especially suitable for occurring in natural gas line valve pit root valve
Pressure sealing is carried out during tiny leakage in the case of on-line production, ensures the delivery safety of natural gas.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is the structure diagram of the tape-pressure leakage clogging device provided in an embodiment of the present invention for root valve；
Fig. 2 is the assembling schematic diagram of the tape-pressure leakage clogging device provided in an embodiment of the present invention for root valve；
Fig. 3 is sectional views of the Fig. 2 along A-A directions；
Fig. 4 is the structure diagram of lower flange in the tape-pressure leakage clogging device provided in an embodiment of the present invention for root valve；
Fig. 5 is sectional views of the Fig. 4 along D-D directions；
Fig. 6 is the structure diagram of the tape-pressure leakage clogging device middle sleeve provided in an embodiment of the present invention for root valve；
Fig. 7 is sectional views of the Fig. 6 along B-B directions；
Fig. 8 is that the structure of polytetrafluoroethylene (PTFE) plug in the tape-pressure leakage clogging device provided in an embodiment of the present invention for root valve is shown
It is intended to；
Fig. 9 is sectional views of the Fig. 8 along C-C directions；
Figure 10 is the decomposition of polytetrafluoroethylene (PTFE) plug in the tape-pressure leakage clogging device provided in an embodiment of the present invention for root valve
Structure diagram.
Reference numeral represents respectively in figure：
1- sleeves；11- gum-injecting ports；12- exhaust outlets；
2- roots valve body；21- valve rods；
3- pressure guiding pipes；
4- first flanges；
5- polytetrafluoroethylene (PTFE) plugs；51- polytetrafluoroethylene (PTFE) partly fills in a；The second polytetrafluoroethylene (PTFE) of 52- partly fills in b；
6- lower flanges；Half lower flange a of 61-；Half lower flange b of 62-；
The first bolts of 7-；
8- valves；
The second bolts of 9-.
Specific embodiment
To make technical scheme of the present invention and advantage clearer, embodiment of the present invention is made below in conjunction with attached drawing into
One step it is described in detail.Unless otherwise defined, all technical terms used in the embodiment of the present invention are respectively provided with and art technology
The normally understood identical meaning of personnel.
An embodiment of the present invention provides a kind of tape-pressure leakage clogging devices for root valve, referring to Fig. 1 and combine Fig. 2, Fig. 3,
The tape-pressure leakage clogging device includes：
The lower flange 6 being set at the position that root valve body 2 is connected with pressure guiding pipe 3, the center of lower flange 6 have with
The through-hole that the shape at position that root valve body 2 is connected with pressure guiding pipe 3 is adapted.
The sleeve 1 being set in outside root valve body 2, the hollow cylinder bodily form that sleeve 1 is opened in upper end closed, lower end,
The lower end of sleeve 1 is along the circumferential direction provided with the upper flange 4 for branch sleeve 1 and lower flange 6.
And the polytetrafluoroethylene (PTFE) plug 5 between sleeve 1 and root valve body 2, polytetrafluoroethylene (PTFE) plug 5 and 1 mistake of sleeve
It is full of cooperation；It is coated between sleeve 1 and polytetrafluoroethylene (PTFE) plug 5, between the outer surface of polytetrafluoroethylene (PTFE) plug 5 and root valve body 2
There is stop-leak compound coating.
In tape-pressure leakage clogging device provided in an embodiment of the present invention, the leak point of root valve 2 is coated using sleeve 1.It utilizes
The upper flange 4 and lower flange 6 for being arranged on 1 lower end of sleeve integrally fix device for plugging, wherein, root valve body 2 and pressure guiding pipe 3
For reducing boss structure at the position of connection, the embodiment of the present invention passes through centrally disposed with the reducing boss structure in lower flange 6
The through-hole that shape is adapted fixes lower flange 6, prevents the device for plugging from being moved up due to stress.In sleeve 1 and root valve 2
Between setting polytetrafluoroethylene (PTFE) plug 5, using the interference fit between sleeve 1 and polytetrafluoroethylene (PTFE) plug 5 and stop-leak compound coating into
Row dual-seal, to ensure sealing effect.
Lower flange 6 when in use, is mounted on root valve body 2 by tape-pressure leakage clogging device provided in an embodiment of the present invention first
At the position being connect with pressure guiding pipe 3, then in 2 outer surface of root valve body and the coating sealing of the outer surface of polytetrafluoroethylene (PTFE) plug 5
Polytetrafluoroethylene (PTFE) plug 5 is sleeved on root valve body 2 by fat later, and finally sleeve 1 is sleeved on polytetrafluoroethylene (PTFE) plug 5, then will be upper
Flange 4 and the connection of lower flange 6 complete the installation of the tape-pressure leakage clogging device namely complete closure to root valve leakage point.
Tape-pressure leakage clogging device provided in an embodiment of the present invention is simple in structure, simple operation, is not required to get angry, and can not stop in pipeline
Quick blocking is carried out to the leakage of root valve in the case of defeated, and can achieve the effect that permanent No leakage, while resistance to pressure
Degree also disclosure satisfy that the design strength requirement of pipeline.
Tape-pressure leakage clogging device provided in an embodiment of the present invention is light especially suitable for occurring in natural gas line valve pit root valve
Pressure sealing is carried out during tiny leakage in the case of on-line production, ensures the delivery safety of natural gas.
It will be appreciated to those of skill in the art that the internal diameter of sleeve 1 should be greater than the width of root valve body 2, here
Width refers to the whole width of root valve body 2, includes the width of valve rod 21, and casing can cover valve to vertical, center.Sleeve
1 thickness is also required to the design strength requirement for meeting pipeline.
It should be noted that lower flange 6 only serves fixed effect, need to consider the close of its region contacted with root valve
Envelope problem.
Further, it referring to Fig. 3 to Fig. 7, in the embodiment of the present invention, is offered respectively on upper flange 4 and lower flange 6 multiple
Connecting hole, and the connecting hole of the connecting hole of upper flange 4 and lower flange 6 is correspondingly arranged, upper flange 4 and lower flange 6 pass through the first spiral shell
Bolt 7 connects.The quantity of the connecting hole of upper flange 4 and lower flange 6 can be 8.The diameter of connecting hole is straight according to the first bolt 7
Depending on diameter, and the minimum diameter of the first bolt 7 should meet strength and stiffness requirement.The thickness of upper flange 4 and lower flange 6 also should
Meet strength and stiffness requirement.
Wherein, lower flange 6 includes half lower flange a 61 and half lower flange b 62.Half lower flange a 61 and half lower flange b 62
Include semicircular main body, be provided at both ends with engaging lug in the radial direction of main body, be provided with connecting hole on engaging lug, the
Two bolts 9 pass through the connecting hole on engaging lug to connect half lower flange a 61 and half lower flange b 62.And half lower flange a 61
The shape being both provided at the position being connected with root valve body 2 with pressure guiding pipe 3 with the center of half lower flange b 62 is adapted
Groove, formed after the groove pairing of half lower flange a 61 and half lower flange b 62 completely with root valve body 2 and pressure guiding pipe 3
The through-hole that the shape at position being connected is adapted.
Further, referring to Fig. 8 to Figure 10, in the embodiment of the present invention, polytetrafluoroethylene (PTFE) plug 5 includes polytetrafluoroethylene (PTFE) half and fills in
A 51 and polytetrafluoroethylene (PTFE) half fill in b 52.Polytetrafluoroethylene (PTFE) half fills in a 51 and polytetrafluoroethylene (PTFE) half fills in 52 equal semicirculars in shape of b, and
It is provided centrally with what is be adapted with 2 shape of root valve body in half plug b 52 of half plug a 51 of polytetrafluoroethylene (PTFE) and polytetrafluoroethylene (PTFE)
Groove, similarly, polytetrafluoroethylene (PTFE) half fill in a 51 and after polytetrafluoroethylene (PTFE) half fill in the groove pairing of b 52, are formed completely and root
The through-hole that valve body 2 shape in portion's is adapted.
Further, referring to Fig. 1, Fig. 2 and Fig. 6, in the embodiment of the present invention, gum-injecting port 11 and row are additionally provided on sleeve 1
Gas port 12, gum-injecting port 11 and exhaust outlet 12 are respectively connected with valve 8, and equipped with adhesive pouring nozzle, wherein valve 8 is high pressure valve.According to
Field working conditions, the interference fit when teflon seal plug 5 and the sealing effect coated in the stop-leak compound coating on sealing surface
When fruit is still undesirable, it can add and be sealed using glue injection type, is as follows：The valve at exhaust outlet 12 is opened, utilizes high pressure
Colloid-injecting gun is connect by adhesive pouring nozzle with sleeve 1, injects stop-leak compound into sleeve 1 from gum-injecting port 11, when stop-leak compound is from exhaust outlet 12
After outflow, close exhaust outlet 12 and continue to inject stop-leak compound, until the pressure in sleeve 1 reaches requirement.
In tape-pressure leakage clogging device provided in an embodiment of the present invention, sleeve 1 can be used steel pipe and process to obtain, by the one of steel pipe 1
Welded closure is held, latus rectum flange is welded in the outer surface of the steel pipe other end as upper flange 4.It is first right before upper flange 4 is welded
The inner surface inner surface of one end that sleeve 1 opens is surface-treated, and is processed using lathe, make the inner surface of sleeve 1 with
The roughness in the region that polytetrafluoroethylene (PTFE) plug 5 is in contact is in below Ra1.6.Also, the port of one end that sleeve 1 opens is machined with
Chamfering, so that polytetrafluoroethylene (PTFE) plug 5 is pressed into.
The procedure of processing of polytetrafluoroethylene (PTFE) plug 5 includes：Polytetrafluoroethylene (PTFE) half is first filled in into a 51 and polytetrafluoroethylene (PTFE) partly fills in b
52 contact facing cut is put down, and outer circle and inner circle processing is carried out after docking, it is ensured that surface is smooth, and roughness is in Ra1.6 hereinafter, simultaneously
The upper surface of polytetrafluoroethylene (PTFE) plug 5 is preferably pressed into when carrying out chamfering to install within one week in casing 1.
It is also to be noted that 1, two polytetrafluoro of sleeve half, which is filled in, should not cut, scratch equivalent damage part on sealing surface
The defects of surface, the lower end (i.e. open one end) of sleeve 1 should not jagged, overlap.
In the embodiment of the present invention, polytetrafluoroethylene (PTFE) plug and the interference volume of sleeve 1 refer to GB/T 150《Steel pressure vessel》,
Stop-leak compound selects uncured stop-leak compound.
Second aspect, the embodiment of the present invention provide a kind of pressurized leaking stoppage method for root valve, the pressurized leaking stoppage method
Implemented using above-mentioned tape-pressure leakage clogging device, specifically include following steps：
Step 101, by lower flange 6 at the position that root valve body 2 is connect with pressure guiding pipe 3；
Step 102, in 2 outer surface of root valve body and the outer surface of polytetrafluoroethylene (PTFE) plug 5 coating stop-leak compound；
Step 103, polytetrafluoroethylene (PTFE) plug 5 is sleeved on root valve body 2；
Step 104, sleeve 1 is sleeved on polytetrafluoroethylene (PTFE) plug 5, then upper flange 4 and lower flange 6 is connected.
Further, after upper flange 4 and lower flange 6 are connected, if the interference fit of teflon seal plug 5
And the sealing effect coated in the stop-leak compound coating on sealing surface is still undesirable, can add and be sealed using glue injection type, i.e., to set
Stop-leak compound is full of in cylinder 1.It is as follows：Open exhaust outlet 12 at valve, using high-pressure injection plastic rifle by adhesive pouring nozzle with
Sleeve 1 connects, and injects stop-leak compound into sleeve 1 from gum-injecting port 11, after stop-leak compound is flowed out from exhaust outlet 12, closes exhaust outlet 12
And continue to inject stop-leak compound, until the pressure in sleeve 1 reaches requirement.
Further, in pressurized leaking stoppage method provided in an embodiment of the present invention, each section is installed and detects sealing
After effect achieves the desired results, the outer surface of tape-pressure leakage clogging device entirety can also be surface-treated and preservative treatment,
So that tape-pressure leakage clogging device can keep good plugging effect for a long time.It is outer that viscoelastic body+polypropylene Cold winding band progress may be used
Anti-corrosion, the Alocit coating that external import may be used in the environment of having water carry out underwater anti-corrosion.
At step 104, polytetrafluoroethylene (PTFE) plug 5 is sleeved on root valve body 2 and then vertically pushed down sleeve 1 poly-
Then tetrafluoroethene plug 5 installs the first bolt 7 and fixes upper flange 4 and lower flange 6, each bolt need intersect, symmetrically, gradually,
It is even to tighten, so as to which polytetrafluoroethylene (PTFE) plug 5 is vertically pressed into sleeve 1.
Before tape-pressure leakage clogging device provided in an embodiment of the present invention is installed, a should be partly filled in sleeve 1, polytetrafluoroethylene (PTFE)
51st, polytetrafluoroethylene (PTFE) half fills in b 52 and the sealing surface of root valve is cleaned, to ensure sealing effect.
It should be noted that in practical applications, the top of root valve can also be connected with pressure guiding pipe, and pass through the pressure guiding pipe
It is connect with other instruments instrument.In such a case, it is possible to which instrument and meter is dismantled, then the impulse valve at the top of root valve is cut
It is disconnected, then tape-pressure leakage clogging device provided in an embodiment of the present invention is installed again.At this point, the space inside sleeve 1 should can accommodate
Root valve and remaining pressure guiding pipe.
Below using to 1 cun of GOV (gas-oil valve) root valve, mating specification asPressure guiding pipe (outer diameter tube
For 33.7mm, pipeline wall thickness 5mm) pressure sealing for, the technical solution of the embodiment of the present invention is described in further detail.
Intercepting specification first isThe Q235 steel pipes 280mm of (outer diameter tube 120mm, pipeline wall thickness 10mm)
As casing 1, one end welding of steel pipe is shut, latus rectum flange is welded in the other end of steel pipe, as upper flange 4, upper flange 4
On open 8Hole, the thickness of upper flange 4 is 25mm.Before upper flange 4 is welded, steel pipe is opened using lathe one
The inner surface at end is surface-treated, and turning depth is 1mm, and internal diameter is after control processing technology makes processingMm,
Surface roughness reaches Ra1.6.
The thickness of lower flange 6 is 30mm, and material is consistent with casing 1, offers 8 thereonHole.According to root valve
The knot of the groove of half lower flange a 61 of structure design and half lower flange b, 62 centers at the position of valve body 2 and the connection of pressure guiding pipe 3
Structure fixes lower flange 6 by the reducing boss at 3 link position of root valve body 2 and pressure guiding pipe, prevents device for plugging because of stress
And it moves up.
Polytetrafluoroethylene (PTFE) plug 5 is processed：Polytetrafluoroethylene (PTFE) half is first filled in into a 51 and polytetrafluoroethylene (PTFE) half fills in the contact surface of b 52
Milling is put down, and outer circle and inner circle processing are carried out after docking, and inner circle is a diameter ofMm, outside diameter size areEnsure that surface is smooth, roughness reaches Ra1.6, and when surface carries out chamfering to install in one week on it
Preferably in press-in casing 1.
Before leak stopping is carried out using above-mentioned tape-pressure leakage clogging device, it should check that 1, two polytetrafluoroethylene (PTFE) of sleeve partly fills in sealing
Whether face has the defects of cut, scratch equivalent damage piece surface.And 1, two polytetrafluoroethylene (PTFE) of sleeve half is filled in and root valve
Sealing surface is cleared up and is cleaned up, and ensures that one end that sleeve 1 opens does not have burr, overlap.Lower flange 6 is mounted on root valve valve
At the position that body 2 is connected with pressure guiding pipe 3, tighten the second bolt 9 and fix half lower flange a 61, half lower flange b 62.Each
One layer of uncured fluid sealant is uniformly smeared on a sealing surface, polytetrafluoroethylene (PTFE) plug 5 is then sleeved on 2 surface of root valve body, then
Sleeve 1 is vertically pushed down into polytetrafluoroethylene (PTFE) plug 5, the first bolt 7 is installed later, each first bolt 7 needs to intersect, symmetrically, gradually,
It is even to tighten, so as to which polytetrafluoroethylene (PTFE) plug 5 is vertically pressed into sleeve 1.
Valve is done in above process and is leaked, the sealing performance of tape-pressure leakage clogging device provided in an embodiment of the present invention is carried out
Detection.By carrying out gas pressure test in laboratory, the results show that pressurize 96 hours under 10MPa, are not any change.
To sum up, an embodiment of the present invention provides a kind of activity duration is short, construction intensity is small and what leak stopping was efficient is used for root
The tape-pressure leakage clogging device and blocking method of portion's valve realize different size root of pipeline polymorphic structure in band pressure zone temperature or on-line production feelings
Fast blockage under condition especially suitable for when minor leakage occurs for natural gas line valve pit root valve in the case of on-line production
Pressure sealing is carried out, ensures the delivery safety of natural gas.
The above is for only for ease of it will be understood by those skilled in the art that technical scheme of the present invention, not limiting
The present invention.All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in this
Within the protection domain of invention.
Claims (10)
1. a kind of tape-pressure leakage clogging device for root valve, which is characterized in that including：
The lower flange (6) being set at the position that root valve body (2) is connected with pressure guiding pipe (3), in the lower flange (6)
The heart has the through-hole that the shape at the position being connected with the root valve body (2) with pressure guiding pipe (3) is adapted；
The external sleeve (1) of the root valve body (2) is set in, the sleeve (1) opens hollow in upper end closed, lower end
Cylindrical, the lower end of the sleeve (1) are along the circumferential direction provided with to connect the sleeve (1) and the lower flange (6)
Upper flange (4)；
And
Polytetrafluoroethylene (PTFE) plug (5) between the sleeve (1) and the root valve body (2), the polytetrafluoroethylene (PTFE) plug
(5) it is interference fitted with the sleeve (1)；Between the sleeve (1) and the polytetrafluoroethylene (PTFE) plug (5), the polytetrafluoroethylene (PTFE)
Stop-leak compound coating is coated between plug (5) and the outer surface of the root valve body (2).
2. tape-pressure leakage clogging device according to claim 1, which is characterized in that divide on the upper flange (4) and lower flange (6)
Multiple connecting holes are not offered, and the connecting hole of the upper flange (4) and the connecting hole of the lower flange (6) are correspondingly arranged, described
Upper flange (4) and the lower flange (6) are connected by the first bolt (7).
3. tape-pressure leakage clogging device according to claim 1 or 2, which is characterized in that the lower flange (6) includes half lower flange
A (61) and half lower flange b (62)；The half lower flange a (61) and the half lower flange b (62) include semicircular main body,
Engaging lug is provided at both ends in the radial direction of the main body, connecting hole is provided on the engaging lug, the second bolt (9) is worn
The connecting hole crossed on engaging lug connects the half lower flange a (61) and the half lower flange b (62)；The half lower flange a
(61) and the center of the half lower flange b (62) is both provided with the position being connected with the root valve body (2) with pressure guiding pipe (3)
The groove that the shape at the place of putting is adapted.
4. tape-pressure leakage clogging device according to claim 1, which is characterized in that the polytetrafluoroethylene (PTFE) plug (5) includes poly- four
Vinyl fluoride partly fills in a (51) and polytetrafluoroethylene (PTFE) partly fills in b (52)；The polytetrafluoroethylene (PTFE) partly fills in a (51) and the polytetrafluoroethylene (PTFE)
Half plug b (52) equal semicircular in shape, and in the polytetrafluoroethylene (PTFE) partly fills in a (51) and the polytetrafluoroethylene (PTFE) partly fills in b (52)
The heart is provided with the groove being adapted with root valve body (2) shape.
5. tape-pressure leakage clogging device according to claim 1, which is characterized in that be additionally provided with gum-injecting port on the sleeve (1)
(11) and exhaust outlet (12), the gum-injecting port (11) and the exhaust outlet (12) are respectively connected with valve (8).
6. tape-pressure leakage clogging device according to claim 1, which is characterized in that the inner surface of the sleeve (1) gathers with described
The roughness in region that tetrafluoroethene plug (5) is in contact in Ra1.6 hereinafter, the inner surface of the polytetrafluoroethylene (PTFE) plug (5) it is thick
Rugosity is in below Ra1.6；The inner surface of the lower end of the sleeve (1) and the edge of the upper surface of the polytetrafluoroethylene (PTFE) (5)
It is machined with chamfering.
7. tape-pressure leakage clogging device according to claim 1, which is characterized in that the stop-leak compound is uncured stop-leak compound.
8. a kind of pressurized leaking stoppage method for root valve, which is characterized in that the pressurized leaking stoppage method using claim 1~
7 any one of them tape-pressure leakage clogging devices are implemented, and include the following steps：
By the lower flange (6) at the position that the root valve body (2) connect with pressure guiding pipe (3)；
In root valve body (2) outer surface and the outer surface of the polytetrafluoroethylene (PTFE) plug (5) coating stop-leak compound；
The polytetrafluoroethylene (PTFE) plug (5) is sleeved on the root valve body (2)；
The sleeve (1) is sleeved on the polytetrafluoroethylene (PTFE) plug (5), then the upper flange (4) and the lower flange (6) are connected
It connects.
9. pressurized leaking stoppage method according to claim 8, which is characterized in that by the upper flange (4) and the laxative remedy
After blue (6) connection, it is full of stop-leak compound to the sleeve (1) is interior.
10. pressurized leaking stoppage method according to claim 8 or claim 9, which is characterized in that the pressurized leaking stoppage method further includes：
The outer surface of tape-pressure leakage clogging device entirety is surface-treated and preservative treatment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611153320.6A CN108223959B (en) | 2016-12-14 | 2016-12-14 | Under-pressure plugging device and plugging method for root valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611153320.6A CN108223959B (en) | 2016-12-14 | 2016-12-14 | Under-pressure plugging device and plugging method for root valve |
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| Publication Number | Publication Date |
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| CN108223959A true CN108223959A (en) | 2018-06-29 |
| CN108223959B CN108223959B (en) | 2020-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611153320.6A Active CN108223959B (en) | 2016-12-14 | 2016-12-14 | Under-pressure plugging device and plugging method for root valve |
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|---|---|---|---|---|
| CN113752447A (en) * | 2020-06-03 | 2021-12-07 | 中国石油化工股份有限公司 | Device and method for online leak stoppage of valve |
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| CN108223959B (en) | 2020-01-03 |
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Address after: 100007 Oil Mansion, 9 North Avenue, Dongcheng District, Beijing, Dongzhimen Patentee after: PETROCHINA Co.,Ltd. Patentee after: National Pipe Network Group Beijing Pipeline Co.,Ltd. Address before: 100007 Oil Mansion, 9 North Avenue, Dongcheng District, Beijing, Dongzhimen Patentee before: PETROCHINA Co.,Ltd. Patentee before: PETROCHINA BEIJING GAS PIPELINE CO.,LTD. |
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Effective date of registration: 20211227 Address after: Room 08-10, 6 / F, block a, No. 5, Dongtucheng Road, Chaoyang District, Beijing 100013 Patentee after: National Petroleum and natural gas pipeline network Group Co.,Ltd. Patentee after: National Pipe Network Group Beijing Pipeline Co.,Ltd. Address before: 100007 Oil Mansion, 9 North Avenue, Dongcheng District, Beijing, Dongzhimen Patentee before: PETROCHINA Co.,Ltd. Patentee before: National Pipe Network Group Beijing Pipeline Co.,Ltd. |