CN1200065C - Sealing agent used for high temp. pressuriced leakage blocking and its use method - Google Patents
Sealing agent used for high temp. pressuriced leakage blocking and its use method Download PDFInfo
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- CN1200065C CN1200065C CN 01144351 CN01144351A CN1200065C CN 1200065 C CN1200065 C CN 1200065C CN 01144351 CN01144351 CN 01144351 CN 01144351 A CN01144351 A CN 01144351A CN 1200065 C CN1200065 C CN 1200065C
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- sealant
- high temperature
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Abstract
The present invention relates to a high-temperature leak stopping sealant with pressure and an application method thereof. Inorganic substances such as phosphate, silicate, etc. are used as carrier materials. Solidifying agents, filling materials and organic auxiliary agents with proper amount are added. After a mixture is mixed by a machine, the high-temperature leak stopping sealant which can carry out leak stoppage at pressure to media, such as high temperature steam, high temperature hydrocarbon, flue gas, etc., can be prepared. The temperature resisting property of the high-temperature leak stopping sealant can reach 800 DEG C. During the leak stoppage, a copying cramping device needs to be arranged in a leakage position. Next, by a high-pressure glue injection gun, a sealant which is shaped by extrusion through a mould is injected into a cavity formed by a clamping device and the outer surface of a leakage position, and a whole body is formed by rapid solidification to prevent the leak of the media. The applicable temperature range of the high-temperature leak stopping sealant is from 200 to 800 DEG C.
Description
Technical field
The present invention relates to a kind of serialization production equipment and do not stop pressure sealing with elevated-temperature seal agent and using method thereof.
Background technology
Known pressure sealing sealing agent, all be based on macromolecular materials such as synthetic rubber and synthetic resins, add an amount of filler and auxiliary agent, form through mechanically mixing, though can be used for the pressure sealing that do not stop of steam, water, the multiple medium of wet goods, but be subjected to the influence of macromolecular material Degradation Characteristics, its use temperature is no more than 400 ℃.The ceramic adhesive that Chinese patent CN1253156A announces is an a kind of pair of component inorganic adhesive, and the A component is based on the high temperature resistant inorganic material, adds various auxiliary agents and metal oxide, rare earth element composition; The B component is to add 0～15% gelatin or methylcellulose gum in 75% the phosphoric acid to form by concentration.The two components of AB are by mixing baking-curing, and the anti-high temperature more than 1500 ℃ of the ceramic adhesive after the curing is applicable to cermet material sealing, bonding, leak stopping and repairing.Though this ceramic adhesive relates to leak stopping, it is two components, need be now with the current, be not suitable for pressure sealing.
The objective of the invention is to be no more than 400 ℃ shortcoming, the preparation method of 200～800 ℃ of pyritous inorganic types of a kind of ability pressure sealing sealing agent is provided at organic leakage blocking sealants heatproof.
Summary of the invention
Sealant for high temperature pressurized leakage stop-up of the present invention has following composition, by weight percentage:
Solid support material 10～30%, solidifying agent 10～20%, retardant 5～20%, filler 20～50%, tackifier 5～10%; Wherein solid support material is the mixture of phosphoric acid salt and silicate, and its weight proportion is preferably phosphoric acid salt according to the height adjustment of medium temperature: silicate=1～3: 1; Solidifying agent is a metal oxide, can be one or more, can be ZnO, Al
2O
3, CuO, MgO etc., preferably CuO; Retardant is anti-pyritous organic polymer more than 200 ℃, and preferably the organic heterocyclic polymkeric substance can be one or more, as being polyimide, polybenzimidazole, polyphenylene sulfide etc., preferably polyphenylene sulfide.
The organic polymer that retardant in the sealant for high temperature pressurized leakage stop-up of the present invention is selected for use, guarantee under higher temperature, just to decompose, to play the retard effect of set time, use-pattern can adopt the method for high-temperature fusion dipping, retardant is coated on the solidifying agent surface, postpones the curing reaction of sealing agent; Filler can reduce the sealant cures shrinking percentage, improve sealing agent intensity and thermotolerance, filler among the present invention can adopt the general filler of conventional seals agent, as graphite, asbestos, carbon fiber, glass fibre etc., wherein the main effect of asbestos, carbon fiber, glass fibre is to improve intensity and thermotolerance, graphite mainly plays filling effect, reduces the cure shrinkage of sealing agent; The main effect of tackifier is the viscosity that increases sealing agent, improves the formability of sealing agent, and tackifier of the present invention can adopt general organic adhesion agent, as fluid rubber, Resins, epoxy, resol etc., can be one or more.Can liquid nbr, liquid butadiene-styrene rubber, hydroxyl terminated butyl nitrile (HTBN) glue etc., preferably hydroxyl terminated butyl nitrile (HTBN) rubber in the fluid rubber.
Sealing agent of the present invention, the main mechanism of action is that curing reaction at high temperature takes place for solid support material and solidifying agent, generates the very high chain molecule of intensity, and resistant to elevated temperatures mineral filler is wrapped in wherein, form hard cured body, with the purpose of the pressure sealing that reaches a high temperature.
The preparation method of sealant for high temperature pressurized leakage stop-up of the present invention can adopt common mechanically mixing method, again by mould extrusion molding sealing, is beneficial to preserve after mechanically mixing.The high temperature leakage blocking sealants of making can be implemented pressure sealing to media such as high-temperature steam, high temperature, hydrocarbon, stack gases, and its heat resistance reaches 800 ℃.
High temp. pressuriced leakage blocking sealing agent of the present invention is owing to select for use resistant to elevated temperatures phosphoric acid salt and silicate to make the sealing agent solid support material, compare with the organic type leakage blocking sealants, raw material sources are wide, complete processing is simple, do not need mixing, extrude, operation such as water-cooled, cost is low, pollution-free.With above-mentioned high temp. pressuriced leakage blocking sealing agent, 200～800 ℃ superheated vapours are implemented pressure sealing, have characteristics such as curing speed is fast, intensity is high, good airproof performance.The pressure sealing that do not stop that can be used for the high temperature medium such as superheated vapour, high temperature, hydrocarbon, stack gas of industries such as petrochemical complex, refining of petroleum, thermal power generation, Metal smelting.Be not suitable for the pressure sealing of cryogenic media below 200 ℃.
High temp. pressuriced leakage blocking sealing agent of the present invention can be used following prepared, but is not limited to this method.
By prescription phosphoric acid salt and silicate are weighed up in the back adding kneader, add other composition successively, vacuumize while stirring, whole process needs 20～60 minutes approximately, pack into after mixing in the airtight plastics bag, after parking 24～72 hours under the room temperature, be squeezed into mould that cylindric (Φ 18～28 * 85mm), and sealing is stored in shady and cool dry place.
The present invention also provides a kind of pressure sealing method that is exclusively used in high temp. pressuriced leakage blocking sealing agent of the present invention, the mode that adopts high-pressure injection is to 200～800 ℃ of high-temperature steams, medium such as high temperature, hydrocarbon and stack gas is implemented pressure sealing, be specially: design and produce a profiling jig at leakage position earlier, then cylindric sealing agent is packed in the colloid-injecting gun, connect oil pipe, shake hydraulic oil pump, sealing agent is expelled in the sealed cavity of leakage position and anchor clamps formation, under 200～800 ℃ of medium temperature effects, the sealing agent fast setting is as a whole, thereby stops the leakage of medium.
Profiling jig is meant the shape and size according to leakage position, what design and produce can contain leakage position and sealing agent is filled wherein and the hardware with intensity, as flange clamp, threeway boxlike anchor clamps, elbow anchor clamps etc., mainly play the effect that makes sealing agent location leak stopping.
Description of drawings
Accompanying drawing 1 is to use flange clamp to implement the synoptic diagram of pressure sealing to flange leakage, and accompanying drawing 2 is flange clamp front views, and accompanying drawing 3 is flange clamp side-views, and accompanying drawing 4 is synoptic diagram of threeway boxlike anchor clamps.1-sealing agent among the figure, 2-flange, 3-flange clamp, 4-gum-injecting port, 5-colloid-injecting gun, 6-manual hydraulic oil pump, 7-threeway pipeline, 8-threeway boxlike anchor clamps.
Embodiment
The invention will be further described below in conjunction with embodiment.
Embodiment 1～10
Adopt the prescription of table 1, use following mode to make high temp. pressuriced leakage blocking sealing agent of the present invention.
By prescription solid support material being weighed up the back adds in the kneader, add filler successively, solidifying agent, retardant, tackifier, vacuumize while stirring, about 30 minutes of whole process is made the high temp. pressuriced leakage blocking sealing agent, pack in the airtight plastics bag, after parking 24～72 hours under the room temperature, be squeezed into mould that cylindric (Φ 18～28 * 85mm), and sealing is stored in shady and cool dry place.
Table 1 embodiment 1～10 prescription
| Composition | Embodiment | |||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |
| Phosphoric acid salt | 10 | 15 | 20 | 10 | 15 | 20 | 10 | 15 | 20 | 15 |
| Silicate | 7 | 5 | 10 | 10 | 7 | 5 | 5 | 10 | 7 | 7 |
| Asbestos | 20 | 10 | 10 | 15 | 20 | 15 | 20 | 20 | 15 | 10 |
| Graphite | 10 | 20 | 10 | 20 | 10 | 20 | 20 | 10 | 20 | 20 |
| | 8 | 18 | 10 | |||||||
| Aluminum oxide | 10 | 12 | ||||||||
| | 8 | 18 | 12 | 8 | 10 | |||||
| Magnesium oxide | 10 | 18 | 12 | 8 | ||||||
| Glass fibre | 7 | 7 | 4 | 8 | 5 | 10 | ||||
| Carbon fiber | 9 | 7 | 6 | 8 | 5 | 5 | ||||
| | 8 | 10 | 15 | |||||||
| Polybenzimidazole | 10 | 18 | 15 | 18 | 10 | |||||
| Polyphenylene sulfide | 15 | 15 | 10 | |||||||
| Resins, epoxy | 5 | |||||||||
| Resol | 5 | |||||||||
| Liquid nbr | 10 | 5 | 5 | |||||||
| The liquid butadiene-styrene rubber | 5 | 5 | 10 | |||||||
| Hydroxyl terminated butyl nitrile (HTBN) glue | 10 | 5 | 10 | |||||||
The high temp. pressuriced leakage blocking sealing agent of the present invention that utilizes embodiment 9 to be produced, carry out the heatproof experiment, the electric furnace energising 5min with 2000W makes its temperature reach maximum, about about 800 ℃, get 20 gram sealing agents, pinch into agglomerate, place on the electric furnace, the very fast burning of organic additive in the sealing agent, remaining composition is cured as a hard spheroid under high temperature action, about 15 grams of weighing illustrate that thus the heat resistance of sealing agent reaches 800 ℃.
The high temp. pressuriced leakage blocking sealing agent of the present invention that embodiment 10 is produced injects in the metal cylinder and sealing, put into resistance furnace internal heating to 600 ℃, behind the constant temperature 30min, reduce temperature to room temperature, take out the moulding situation after sealing agent is heated in the metal cylinder inspection section, the discovery sealing agent is fixed to be a very high integral body of compactness, illustrates that sealing agent has reliable stopping property under 600 ℃ of high temperature.
Embodiment 11
Superheated vapour pipeline threeway position weld seam leaks, 540 ℃ of temperature, pressure 11.0MPa, make threeway anchor clamps with high-strength steel and be installed to leakage position, with the high-pressure injection plastic rifle high temp. pressuriced leakage blocking sealing agent of the present invention that embodiment 1 is produced is expelled to rapidly in the anchor clamps cavity, 10min has just eliminated leakage.
Embodiment 12
High-temperature steam leaks, leakage position is the valve gland flange, 450 ℃ of temperature, pressure 4.5MPa, make a flange clamp with the A3 steel and be installed to leakage position, with the high-pressure injection plastic rifle high temp. pressuriced leakage blocking sealing agent of the present invention that embodiment 2 is produced is expelled in the flange gap, has just eliminated leakage less than 15min.
Embodiment 13
Device leaks, and temperature reaches 550 ℃, pressure 1.7MPa, leakage position is the elbow commissure, design and produce a profiling jig and be installed to leakage position, with the high-pressure injection plastic rifle high temp. pressuriced leakage blocking sealing agent of the present invention that embodiment 3 is produced is expelled in the anchor clamps cavity, 5min promptly blocks leakage.
Embodiment 14
Stack gas is leaked, 600 ℃ of temperature, pressure 1.0MPa, leakage occurs in the flange connections of φ 600mm, because diameter is bigger, adopt the pre-manufactured steel carrying jig to carry out local leak stopping, the high temp. pressuriced leakage blocking sealing agent of the present invention that embodiment 4 is produced is expelled in the flange gap, and 30min will leak elimination.
Embodiment 15
Heat supply pipeline generation high-temperature steam leaks, leak is the flange of a φ 150mm, 420 ℃ of vapor temperatures, pressure 4.0MPa, with the shutoff of organic type sealing agent, failed to block leakage in 48 hours, make a flange clamp and be installed to leakage position, the high temp. pressuriced leakage blocking sealing agent of the present invention leak stopping of adopting embodiment 5 to be produced, 20min just will leak elimination.
Embodiment 16
The flange gasket trim leaks, 520 ℃ of vapor temperatures, pressure 11.0MPa makes a flange clamp with high-strength steel and is installed to leakage position, with the high-pressure injection plastic rifle high temp. pressuriced leakage blocking sealing agent of the present invention that embodiment 6 is produced is expelled in the flange gap, has eliminated leakage very soon.
Embodiment 17
Oil leakage, 350 ℃ of temperature, pressure 1.3MPa, leakage position is straight tube neck commissure, according to the shape of leakage position, designs and produces gold medal formula anchor clamps, the high temp. pressuriced leakage blocking sealing agent of the present invention leak stopping of adopting embodiment 7 to be produced has just been eliminated leakage less than 25min.
Embodiment 18
High temperature and high pressure steam leaks, 540 ℃ of temperature, pressure 13.0MPa, leakage position is a superheated vapour Trunk Line valve gland flange, adopt high-strength steel to design and produce flange clamp and be installed to and leak on the flange, with the high-pressure injection plastic rifle high temp. pressuriced leakage blocking sealing agent of the present invention that embodiment 7 is produced is expelled in the flange gap, the very fast curing of sealing agent is as a whole, has blocked leakage.
Claims (10)
1. sealant for high temperature pressurized leakage stop-up, by weight percentage, it consists of: solid support material 10～30%, solidifying agent 10～20%, retardant 5～20%, filler 20～50%, tackifier 5～10%; Wherein solid support material is the mixture of phosphoric acid salt and silicate, and solidifying agent is zinc oxide, aluminum oxide, cupric oxide, magnesium oxide, is one or more, and retardant is anti-pyritous organic polymer more than 200 ℃, is one or more.
2. sealant for high temperature pressurized leakage stop-up according to claim 1 is characterized in that: it is phosphoric acid salt that phosphoric acid salt and silicate are formed part by weight: silicate=1～3: 1.
3. sealant for high temperature pressurized leakage stop-up according to claim 1 is characterized in that: solidifying agent is a cupric oxide.
4. sealant for high temperature pressurized leakage stop-up according to claim 1 is characterized in that: retardant is a heterocycle polymer.
5. according to claim 1 or 4 described sealant for high temperature pressurized leakage stop-up, it is characterized in that: retardant is a polyphenylene sulfide.
6. sealant for high temperature pressurized leakage stop-up according to claim 1 is characterized in that: filler is graphite, asbestos, carbon fiber, glass fibre.
7. sealant for high temperature pressurized leakage stop-up according to claim 1 is characterized in that: tackifier are fluid rubber.
8. sealant for high temperature pressurized leakage stop-up according to claim 7 is characterized in that: tackifier are hydroxyl terminated butyl nitrile (HTBN) rubber.
9. pressure sealing method that is exclusively used in the described sealant for high temperature pressurized leakage stop-up of claim 1, earlier design and produce a profiling jig when it is characterized in that implementing pressure sealing at leakage position, then cylindric sealing agent is packed in the colloid-injecting gun, connect oil pipe, shake hydraulic oil pump, sealing agent is expelled in the sealed cavity of leakage position and anchor clamps formation, under 200～800 ℃ of medium temperature effects, the sealing agent fast setting is as a whole, thereby stops the leakage of medium.
10. pressure sealing method according to claim 9, it is characterized in that: profiling jig is the shape and size according to leakage position, what design and produce can contain leakage position and sealing agent is filled wherein and the hardware with intensity, plays the effect that making sealing agent location leak stopping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01144351 CN1200065C (en) | 2001-12-17 | 2001-12-17 | Sealing agent used for high temp. pressuriced leakage blocking and its use method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01144351 CN1200065C (en) | 2001-12-17 | 2001-12-17 | Sealing agent used for high temp. pressuriced leakage blocking and its use method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1427060A CN1427060A (en) | 2003-07-02 |
| CN1200065C true CN1200065C (en) | 2005-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01144351 Expired - Fee Related CN1200065C (en) | 2001-12-17 | 2001-12-17 | Sealing agent used for high temp. pressuriced leakage blocking and its use method |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031085B (en) * | 2010-11-22 | 2012-12-12 | 天津市江达扬升工程技术有限公司 | High-temperature pressure sealing injection agent |
| CN102190820A (en) * | 2011-03-23 | 2011-09-21 | 天津市金岭科技有限公司 | Preparation of seal assistant for leak stoppage through carbon nano tube modification |
| CN104629681B (en) * | 2013-11-08 | 2016-08-24 | 天津金恒伟创科技有限公司 | Pressurized leakage-blocking glue |
| CN104031608A (en) * | 2014-06-06 | 2014-09-10 | 无锡市崇安区科技创业服务中心 | Sealing agent for high-temperature pressure plugging and preparation method thereof |
| CN104449563A (en) * | 2014-10-29 | 2015-03-25 | 无锡乐华自动化科技有限公司 | Sealant for blocking leakage under pressure |
| CN104835628B (en) * | 2015-04-27 | 2017-07-07 | 国家电网公司 | With the power high voltage oil-filled mutual inductor device for plugging and its application method of seal closure |
| CN105802218B (en) * | 2016-04-28 | 2019-01-18 | 苏州科迪流体控制设备有限公司 | A kind of heat-resisting material for valve seal |
| CN108250984B (en) * | 2018-01-22 | 2020-06-09 | 黑龙江省科学院石油化学研究院 | Heat-resistant 3300 ℃ ultrahigh temperature-resistant adhesive |
| CN113339624B (en) * | 2021-07-08 | 2022-08-30 | 四川达兴能源有限责任公司 | Online leakage blocking method for debenzolization tower |
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- 2001-12-17 CN CN 01144351 patent/CN1200065C/en not_active Expired - Fee Related
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Granted publication date: 20050504 Termination date: 20201217 |