CN209370683U - A kind of non-metal expansion joint self sealing structure for hot air duct - Google Patents
A kind of non-metal expansion joint self sealing structure for hot air duct Download PDFInfo
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- CN209370683U CN209370683U CN201920051668.7U CN201920051668U CN209370683U CN 209370683 U CN209370683 U CN 209370683U CN 201920051668 U CN201920051668 U CN 201920051668U CN 209370683 U CN209370683 U CN 209370683U
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- expansion joint
- metal expansion
- hot air
- air duct
- tung oil
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Abstract
The utility model discloses a kind of non-metal expansion joint self sealing structures for hot air duct, belong to seal for pipe joints equipment technical field.The non-metal expansion joint self sealing structure, including covering, press strip, conjunction bolt and rack；Covering is fixed on the periphery of two racks by press strip and conjunction bolt, realizes being flexible coupling for two adjacent racks；The inside of rack is enclosed annular sealing cavity by inner deflector and outer deflector and covering；Wherein, tung oil gel layer and ceramic fibre filled layer are alternately filled in the sealing cavity.It is not only able to effectively extend the maintenance cycle of expansion joint by the self-sealing mode that tung oil gel layer and ceramic fibre are arranged alternately.Meanwhile also personnel can be facilitated to overhaul and reduce maintenance cost, shorten maintenance cycle.
Description
Technical field
The utility model relates to a kind of non-metal expansion joint self sealing structures for hot air duct, belong to seal for pipe joints and set
Standby technical field.
Background technique
Non-metal expansion joint, also known as non-metal compensator, fabric compensator are a kind of typical compensators, can be used for mending
Repay axial pipeline, lateral or angular deformation or because of amount of movement brought by the reasons such as vibration.Due to the material of non-metal compensator
Matter is mainly fabric, rubber or other heat-resisting materials, especially suitable for hot air duct, fume ducts and desulfuration pipeline
Deng.
Currently, the structure of existing non-metal expansion joint is mainly by covering, stainless steel cloth, heat-preservation cotton and rack group
At.Wherein, covering is the main extrusome of non-metal expansion joint, is by silicon rubber or high silicon oxygen polytetrafluoroethylene (PTFE) and alkali-free glass
The multilayer materials such as silk floss are combined.Stainless steel cloth is the liner of non-metal expansion joint, can prevent impurity in circulation medium
Into expansion joint and the outside of heat-insulating material in expansion joint is prevented to scatter and disappear.Heat-preservation cotton is to take into account the dual work of heat preservation and air-tightness
With, be made of glass fabric, high silicon oxygen cloth and all kinds of heat preservation blankets etc., have good ductility and tensile strength.And
Rack is the profile bracket of non-metal expansion joint, for guaranteeing enough strength and stiffness.
Existing non-metal expansion joint is mainly sealed (Fig. 1) using deflector inside and outside wrong scissors internal, for a long time
Use process in sealing effect it is inevitably lower and lower.High-temperature flue gas can enter inside expansion joint to heat-preservation cotton,
Covering etc. is washed away repeatedly, this is to cause the main original that non-metal expansion joint internal layer ruptures too early or even covering tearing is revealed
Cause.Non-metal expansion joint causes seriously environment once rupturing the leakage that will cause other pollutants such as a large amount of hot fumes, exhaust gas
Pollution.Simultaneously as the position that non-metal expansion joint is installed often is in high-altitude, expansion joint size is very big, conjunction bolt
Enormous amount, maintenance process must carry out high altitude operation, and security risk is very high.Currently, traditional non-metal expansion joint seals knot
Structure service life is generally only 1 year or so, and maintenance process is time-consuming and laborious, and frequent maintenance can cause very big economy negative to enterprise
Load.
Utility model content
To solve to be easy inside expansion joint in existing non-metal expansion joint long-term use process to wash away rupture by high-temperature flue gas,
The technical problem that service life is short, maintenance cycle is short, the utility model provide a kind of nonmetallic expansion for hot air duct
Self sealing structure is saved, the technical solution taken is as follows:
A kind of non-metal expansion joint self sealing structure for hot air duct, including covering 1, press strip 2,4 and of conjunction bolt
Rack 8；Covering 1 passes through press strip 2 and the periphery for conjunction bolt 4 being fixed on two racks 8, realizes the soft company of two adjacent racks 8
It connects；The inside of rack 8 is enclosed annular sealing cavity by inner deflector 5 and outer deflector 6 and covering 1；Wherein, described
Tung oil gel layer 9 and ceramic fibre filled layer 10 are alternately filled in sealing cavity.
Preferably, tung oil gel layer 9 is equipped in the inside contact surface of the sealing cavity.
It is highly preferred that the thickness with the tung oil gel layer 9 of the inside contact surface of the sealing cavity is more than or equal to 3mm.
Preferably, not with the tung oil gel layer 9 of the interior side contacts face contact of sealing cavity with a thickness of 1.5mm~3.0mm.
Preferably, the material of the ceramic fibre filled layer 10 is ceramic alumina fiber.
Preferably, the compression ratio of 10 inner filling material of ceramic fibre filled layer is 10:1.
Preferably, the compression ratio of the tung oil gel layer 9 is 3:1, and heat resistance is 1200 DEG C, and elongation rate of tensile failure is not less than
300%, tensile strength is not less than 5MPa, and shear strength is not less than 6MPa.The tung oil gel is existing commercial product, can be passed through
Rise anti-corrosion material Co., Ltd, Beijing Mortopl card Mande Science & Technology Co., Ltd., hair new energy (Dalian) Co., Ltd, section in Langfang ten thousand
The material is bought Deng the company for selling the product.
Preferably, the covering is that fluorubber expands covering, is fixedly mounted on the outer of rack by bolt and rubber bound
Side.Wherein, fluorubber expansion covering and rubber cement are commercial product, and those skilled in the art can be obtained by commercial channel
?.
Compared with the existing technology, the utility model obtain the utility model has the advantages that
It is high using high temperature resistant between covering and deflector in the case where continuing to use existing wrong scissors deflector sealing means
The tung oil gel layer and the spaced mode of ceramic fibre of elasticity enrich filling.In the downside of outer deflector, setting high temperature resistant is high
The tung oil gel layer of elasticity, after the sealing of inner deflector and outer deflector is destroyed because of use for a long time, the tung oil of lower layer
Gel layer has biggish elasticity and high-temperature stability, and effectively high-temperature flue gas can be blocked in except expansion joint skeleton, made
Covering and thermal insulation material do not reach high-temperature flue gas, and effectively preventing high pollution flue gas leakage caused by tearing because of covering causes
Problem of environmental pollution.Importantly, multilayer tung oil gel layer is arranged by the way of being arranged alternately at the position, realize
The self-sealing of expansion joint can effectively extend the service life of non-metal expansion joint, reduce frequency of maintenance.
Further, the self-sealing mode being arranged alternately by tung oil gel layer with ceramic fibre is not only able to effectively extend
The maintenance cycle of expansion joint.Meanwhile because being sealed using self-sealing mode, also personnel can be facilitated to overhaul and reduce maintenance at
This, shortens maintenance cycle.In maintenance process, as long as checking the integrality of self sealing structure.Once it was found that self-sealing knot
Structure is damaged, and maintenance only needs to fill to destroy layer, and supplements tung oil gel layer, it is not necessary to entire non-gold is replaced because of damaged skin
Belong to expansion joint.
The stainless steel wire mesh that existing non-metal expansion joint must have is omitted in the self sealing structure, using tung oil gel
Layer fills cavity with the alternate mode of ceramic fiber layer.Not only the structure of expansion joint is simplified, while being also beneficial to simplify
Maintenance program.
Detailed description of the invention
Fig. 1 is existing common non-metal expansion joint broken section structural schematic diagram (arrow is hot fume direction).
Fig. 2 is the broken section structural schematic diagram of non-metal expansion joint in a kind of preferred embodiment of the utility model.
Fig. 3 is the partial enlargement structural representation of Fig. 2.
In figure: 1, covering；2, press strip；3, pipeline；4, conjunction bolt；5, inner deflector；6, outer deflector；7, heat-preservation cotton
Layer；8, rack；9, tung oil gel layer；10, ceramic fibre filled layer.
Specific embodiment
Following embodiment material therefor, method and instrument, without specified otherwise, be this field conventional material, method and
Instrument, those of ordinary skill in the art can be obtained by commercial channel.
The utility model in following description, it should be noted that term " center ", " longitudinal direction ", " transverse direction ", "upper",
The indicating positions such as "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outside" and " endways " or positional relationship are base
In orientation or positional relationship shown in the drawings, be merely for convenience of describing the present invention and simplifying the description, rather than indicate or
Imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, it is thus impossible to be interpreted as
Limitations of the present invention.
The utility model in following description, it should be noted that unless otherwise expressly provided with limit, term " peace
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be and be directly connected to, be also possible to be indirectly connected with by intermediate medium, can be the connection of two components interiors.It is right
For those skilled in the art, can be concrete condition understand submit a written statement to a higher authority term in the present invention specifically contain
Justice.
In addition, the utility model in following description, unless otherwise indicated, " multiple ", " multiple groups ", the meaning of " more "
It is two or more.
The utility model is described in further details with reference to the accompanying drawing, but following detailed description is not intended as to originally practical
Novel restriction.
Fig. 2 is the broken section structural schematic diagram of non-metal expansion joint in a kind of preferred embodiment of the utility model.Fig. 3 is figure
2 partial enlargement structural representation.From Fig. 2 and Fig. 3 it is found that the non-metal expansion joint of the preferred embodiment includes being connected with pipeline 3
Rack 8, covering 1, press strip 2 and conjunction bolt 4 is formed.The both ends of covering 1 are crimped on the outer of rack 8 respectively by two press strips 2
Circumferential edges, and by the way that conjunction bolt 4 is fixed.The inner deflector 5 and outer deflector 6 of wrong scissors sealing are equipped in the inside of rack 8.
Multilayer tung oil gel layer 9 and ceramic fibre filling are arranged alternately in the toroidal cavity formed between inside and outside deflector and covering 1
Layer 10.Wherein, high temperature resistant is equipped in the lower part of the bottom portion of groove of toroidal cavity, side wall and inner deflector 5 and outer deflector 6
High resiliency tung oil gel layer 9, the tung oil gel layer with a thickness of 4mm.Meanwhile it being equipped in toroidal cavity by being partitioned from
Two ceramic fibre filled layers 10, divide the tung oil gel layer 9 of two ceramic fibre filled layers 10 with a thickness of 2.5mm.It should
The compression ratio of 10 inner filling material of ceramic fibre filled layer is 10:1.
The material of the ceramic fibre filled layer 10 is commercially available ceramic alumina fiber, and tung oil gel is commercially available high temperature modification
High resiliency tung oil gel, tung oil gel used in present embodiment send out new energy (Dalian) Co., Ltd purchased from section.The tung oil is solidifying
The property of glue is as follows:
The high-elastic tung oil gelling performance index of 1 high temperature modification of table
| Physical property | Measurement unit | High resiliency tung oil gel LH-04 |
| Color | Two-component | Black |
| Density | g/ml | 1.8±0.1 |
| Tensile strength | Mpa | ≥5 |
| Shear strength | Mpa | ≥6 |
| Hardness | Shore | ≥40 |
| Do solid work the time | H | ≥6 |
| Presetting period | min | ≤30 |
| Water-fast shear strength | Mpa | ≥10 |
| Compression ratio | Times | 3:1 |
| Acid resistance | 25℃-180℃ | The acid of resistance to any concentration |
| Heat resistance | ℃ | 1200 |
| Elongation rate of tensile failure | % | ≥300 |
The illustratively maintenance maintenance process of the expansion joint by taking boiler flue as an example below:
After boiler down clear up expansion joint around dust stratification and remove bottom breakage covering, two side skins removing 2 meters with
Guarantee the transition of new covering and old covering.If necessary to more renew covering, need all to remove old expansion joint covering, cleaning is dry
The deflector of net non-metal expansion joint；
The complete liquidation of non-metal expansion joint metallic framework is fallen float ash after, it is fast after the completion of reparation to damaged portion repair by welding
High temperature bucket oleogel is coated in expansion joint groove both sides by speed, preceding pyroceram fibre filler is packed into groove uncured
It is interior；
One layer of filler of every filling needs Feng Yici glue, until the skeleton groove of non-metal expansion joint is filled and led up, the top one
Layer is carefully tied with high resiliency tung oil gel, and thickness control is in 3mm or so；
Fluorubber expansion joint covering is installed, two sides joint area is secured using super heated rubber binder bonding；
Abrasionproof processing is done to deflector inside in process implementing, avoids deflector erosive wear, expansion joint is caused to leak；
With the corrosion-resistant glue of high resiliency all being sealed with the acidproof glue of high resiliency at expansion joint girth seam etc., thickness requirement
3mm or more；
Maintenance can come into operation for 6 hours.
Tung oil gel layer and ceramic fibre filled layer are set by alternative expression, multilayer self-sealing is carried out to covering, can be incited somebody to action
The service life of expansion joint extended to 5 years by 1 year.Meanwhile it can also effectively shorten the maintenance period of expansion joint, and maintenance process
Also it is simplified, need to only remove the self-closing layer of damage, it is not necessary to overall pulling down or replacement covering.It is changed without expansion joint covering and passes
System more renews covering and has a clear superiority in expense.It does not need to remove covering (covering projected life is generally 15 years), need to only tear open
Start schooling skin a side plate indentation flexible filler, substantially reduce construction period, expense and the common construction base for more renewing covering
This is identical, but the service life extends at least 5 years or more, without expansion joint leakage before self-sealing technique only by more renewing covering
Administer leakage.
Although the utility model has been disclosed in the preferred embodiment as above, it is not intended to limit the utility model, and is appointed
What person skilled in the art can do various changes and modification, therefore without departing from the spirit and scope of the utility model
The protection scope of the utility model should subject to the definition of the claims.
Claims (7)
1. a kind of non-metal expansion joint self sealing structure for hot air duct, which is characterized in that including covering (1), press strip
(2), conjunction bolt (4) and rack (8)；Covering (1) is fixed on the outer of two racks (8) by press strip (2) and conjunction bolt (4)
Realize that two adjacent rack (8) are flexible coupling in week；The inside of rack (8) is by inner deflector (5) and outer deflector (6) and covers
Skin (1) is enclosed annular sealing cavity；It is alternately filled out filled with tung oil gel layer (9) and ceramic fibre in the sealing cavity
Fill layer (10).
2. a kind of non-metal expansion joint self sealing structure for hot air duct according to claim 1, which is characterized in that
Tung oil gel layer (9) are equipped in the inside contact surface of the sealing cavity.
3. a kind of non-metal expansion joint self sealing structure for hot air duct according to claim 2, which is characterized in that
It is more than or equal to 3mm with the thickness of the tung oil gel layer (9) of the inside contact surface of the sealing cavity.
4. a kind of non-metal expansion joint self sealing structure for hot air duct according to claim 2, which is characterized in that
Not with the tung oil gel layer (9) of the interior side contacts face contact of sealing cavity with a thickness of 1.5mm~3.0mm.
5. a kind of non-metal expansion joint self sealing structure for hot air duct according to claim 1, which is characterized in that
The material of the ceramic fibre filled layer (10) is ceramic alumina fiber.
6. a kind of non-metal expansion joint self sealing structure for hot air duct according to claim 1, which is characterized in that
The compression ratio of ceramic fibre filled layer (10) inner filling material is 10:1.
7. a kind of non-metal expansion joint self sealing structure for hot air duct according to claim 1, which is characterized in that
The compression ratio of the tung oil gel layer (9) is 3:1, and heat resistance is 1200 DEG C, and elongation rate of tensile failure is not less than 300%, tensile strength
Not less than 5MPa, shear strength is not less than 6MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920051668.7U CN209370683U (en) | 2019-01-10 | 2019-01-10 | A kind of non-metal expansion joint self sealing structure for hot air duct |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920051668.7U CN209370683U (en) | 2019-01-10 | 2019-01-10 | A kind of non-metal expansion joint self sealing structure for hot air duct |
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| Publication Number | Publication Date |
|---|---|
| CN209370683U true CN209370683U (en) | 2019-09-10 |
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ID=67825185
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920051668.7U Active CN209370683U (en) | 2019-01-10 | 2019-01-10 | A kind of non-metal expansion joint self sealing structure for hot air duct |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114110289A (en) * | 2022-01-26 | 2022-03-01 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Large-compensation compact compensator |
-
2019
- 2019-01-10 CN CN201920051668.7U patent/CN209370683U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114110289A (en) * | 2022-01-26 | 2022-03-01 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Large-compensation compact compensator |
| CN114110289B (en) * | 2022-01-26 | 2022-04-29 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Large-compensation compact compensator |
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