CN209705517U - A kind of boiler feed back leg expansion joint - Google Patents
A kind of boiler feed back leg expansion joint Download PDFInfo
- Publication number
- CN209705517U CN209705517U CN201920433713.5U CN201920433713U CN209705517U CN 209705517 U CN209705517 U CN 209705517U CN 201920433713 U CN201920433713 U CN 201920433713U CN 209705517 U CN209705517 U CN 209705517U
- Authority
- CN
- China
- Prior art keywords
- feed back
- expansion joint
- back leg
- boiler feed
- guide shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 210000002445 nipple Anatomy 0.000 claims abstract description 28
- 239000000945 filler Substances 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 27
- 239000000919 ceramic Substances 0.000 claims description 20
- 239000000835 fiber Substances 0.000 claims description 18
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 239000003063 flame retardant Substances 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010431 corundum Substances 0.000 claims description 7
- 229910052593 corundum Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Abstract
The utility model discloses a kind of boiler feed back leg expansion joints, including filler insulating layer, guide shell, inner cylinder, bellows and two pipe nipples for separating setting, bellows is connected between two pipe nipples, inner cylinder section is stepped and is fixed on pipe nipple, guide shell is located on the inside of inner cylinder and is fixed on pipe nipple, pipe nipple, bellows, inner cylinder and guide shell surround labyrinth type inner cavity, and filler insulating layer is filled in labyrinth type inner cavity.The utility model has preferable sealing and high temperature resistance.
Description
Technical field
The utility model relates to expansion joints, relate in particular to a kind of boiler feed back leg expansion joint.
Background technique
In Circulating Fluidized Bed Boilers structure, feed back leg is that the high-temperature material of boiler output is sent to pot by feedback air
The burner hearth of furnace improves the efficiency of combustion of boiler so that material is carried out circulation full combustion, sets between feed back leg and material returning valve
Expansion joint is set, the expansion synchronous with burner hearth of feed back leg is so enable to seal however, existing expansion joint is easily invaded by medium, is resistance to
High-temperature behavior is poor, causes its service life short, makes feed back leg bad stability.
Summary of the invention
For overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of boiler feed back leg expansion joint,
With preferable sealing and high temperature resistance.
The purpose of this utility model is achieved through the following technical solutions:
A kind of boiler feed back leg expansion joint, two including filler insulating layer, guide shell, inner cylinder, bellows and separation setting
A pipe nipple, bellows are connected between two pipe nipples, and inner cylinder section is stepped and is fixed on pipe nipple, and guide shell is located at
On the inside of inner cylinder and it is fixed on pipe nipple, pipe nipple, bellows, inner cylinder and guide shell surround labyrinth type inner cavity, and filler insulating layer is filled out
It fills in labyrinth type inner cavity.
Preferably, the boiler feed back leg expansion joint further includes flame retardant coating, and flame retardant coating is poured in the inner wall of pipe nipple and interior
The inner wall of cylinder.
Preferably, flame retardant coating includes bitch, fire resisting pours the bed of material and corundum pours the bed of material, and fire resisting pours the bed of material through bitch
It is fixed on termination inside pipe wall, corundum pours that the bed of material is fixed on inner cylinder inner wall through bitch and fire resisting pours bed of material inner wall.
Preferably, the boiler feed back leg expansion joint further includes sealing ring, the sealing ring clips be set to guide shell with it is resistance to
Between fire bed.
Preferably, sealing ring includes several ceramic fibre ropes and steel wire, and ceramic fibre rope winds glomeration, and several ceramics are fine
Dimension rope is fixed on guide shell through steel wire series connection.
Preferably, the boiler feed back leg expansion joint further includes wearing layer, and wearing layer is set to guide shell inner wall.
Preferably, wearing layer include hexsteel and it is wear-resisting pour the bed of material, hexsteel is layed in guide shell inner wall, wear-resisting to pour
The bed of material is poured through hexsteel in guide shell inner wall.
Preferably, filler insulating layer includes two pieces of ceramic fiber blankets, wherein a ceramic fiber blanket is fixed on two through briquetting
Between pipe nipple, another ceramic fiber blanket is fixed between inner cylinder and guide shell through briquetting.
Compared with prior art, the utility model has the following beneficial effects:
The utility model is arranged by mazy inner cavity, so that the filler insulating layer being filled in it has good height
Temperature is heat-insulated and dust seal acts on, and effectively expansion joint to be avoided to be invaded by medium, ensure that its stability, and then keep feed back leg steady
It is fixed, reliable.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model boiler feed back leg expansion joint.
In figure: 1, pipe nipple；2, bellows；3, guide shell；4, inner cylinder；5, ceramic fiber blanket；6, briquetting；7, bitch；8,
Fire resisting pours the bed of material；9, corundum pours the bed of material；10, hexsteel；11, wear-resisting to pour the bed of material；12, ceramic fibre rope；13, steel wire.
Specific embodiment
The utility model is described in further detail in the following with reference to the drawings and specific embodiments.
A kind of boiler feed back leg expansion joint as shown in Figure 1, including filler insulating layer, guide shell 3, inner cylinder 4, bellows 2
With two pipe nipples 1 for separating setting, bellows 2 is connected between two pipe nipples 1, and 4 section of inner cylinder is stepped and fixed
In pipe nipple 1, guide shell 3 is located at 4 inside of inner cylinder and is fixed on pipe nipple 1, pipe nipple 1, bellows 2, inner cylinder 4 and guide shell 3
Labyrinth type inner cavity is surrounded, filler insulating layer is filled in labyrinth type inner cavity.
It is arranged by mazy inner cavity, so that the filler insulating layer being filled in it has good high temperature insulating and prevents
Dirt sealing function ensure that its stability effectively expansion joint to be avoided to be invaded by medium, and then keep feed back leg stable, reliable.Its
In, the filler insulating layer of the present embodiment includes two pieces of ceramic fiber blankets 5, wherein a ceramic fiber blanket 5 is fixed on two through briquetting 6
Between pipe nipple 1, another ceramic fiber blanket 5 is fixed between inner cylinder 4 and guide shell 3 through briquetting 6, to obtain high temperature resistant and sealing
Effect.
Further, be to reinforce heat-resisting ability, the boiler feed back leg expansion joint further includes flame retardant coating, flame retardant coating pour in
The inner wall of pipe nipple 1 and the inner wall of inner cylinder 4.Specifically, flame retardant coating includes that bitch 7, fire resisting pour the bed of material 8 and corundum pouring material
Layer 9, fire resisting pours the bed of material 8 and is fixed on 1 inner wall of pipe nipple through bitch 7, and corundum pours the bed of material 9 and is fixed on 4 inner wall of inner cylinder through bitch 7
And fire resisting pours 8 inner wall of the bed of material, has the function of refractory heat-insulating and media-resistant erosive wear.
Further, the boiler feed back leg expansion joint further includes sealing ring, the sealing ring clips be set to guide shell 3 with it is resistance to
Between fire bed.Specifically, sealing ring includes several ceramic fibre ropes 12 and steel wire 13, and ceramic fibre rope 12 winds glomeration, if
Dry ceramic fibre rope 12 is fixed on guide shell 3 through the series connection of steel wire 13, has dust seal effect, prevents medium and enter in expansion joint
Portion.
Further, the boiler feed back leg expansion joint further includes wearing layer, and wearing layer is set to 3 inner wall of guide shell.Specifically,
Wearing layer include hexsteel 10 and it is wear-resisting pour the bed of material 11, hexsteel 10 is layed in 3 inner wall of guide shell, wear-resisting to pour the warp of the bed of material 11
Hexsteel 10 is poured in 3 inner wall of guide shell, has the function of refractory heat-insulating and media-resistant erosive wear.
The embodiments of the present invention is without being limited thereto, according to the above content of the utility model, utilizes the general of this field
Logical technological know-how and customary means, under the premise of not departing from the utility model above-mentioned basic fundamental thought, the utility model may be used also
To make the modification, replacement or change of other diversified forms, all fall within the utility model rights protection scope.
Claims (8)
1. a kind of boiler feed back leg expansion joint, which is characterized in that including filler insulating layer, guide shell, inner cylinder, bellows and separation
Two pipe nipples being arranged, bellows are connected between two pipe nipples, and inner cylinder section is stepped and is fixed on pipe nipple, are led
Flow cartridge is located on the inside of inner cylinder and is fixed on pipe nipple, and pipe nipple, bellows, inner cylinder and guide shell surround labyrinth type inner cavity, filler
Insulating layer is filled in labyrinth type inner cavity.
2. boiler feed back leg expansion joint according to claim 1, which is characterized in that the boiler feed back leg expansion joint also wraps
Flame retardant coating is included, flame retardant coating pours the inner wall of inner wall and inner cylinder in pipe nipple.
3. boiler feed back leg expansion joint according to claim 2, which is characterized in that flame retardant coating includes that bitch, fire resisting pour
The bed of material and corundum pour the bed of material, and fire resisting pours the bed of material and is fixed on termination inside pipe wall through bitch, and it is solid through bitch that corundum pours the bed of material
Bed of material inner wall is poured due to inner cylinder inner wall and fire resisting.
4. boiler feed back leg expansion joint according to claim 3, which is characterized in that the boiler feed back leg expansion joint also wraps
Sealing ring is included, which is set between guide shell and flame retardant coating.
5. boiler feed back leg expansion joint according to claim 4, which is characterized in that sealing ring includes several ceramic fibre ropes
And steel wire, ceramic fibre rope wind glomeration, several ceramic fibre ropes are fixed on guide shell through steel wire series connection.
6. boiler feed back leg expansion joint according to claim 1, which is characterized in that the boiler feed back leg expansion joint also wraps
Wearing layer is included, wearing layer is set to guide shell inner wall.
7. boiler feed back leg expansion joint according to claim 4, which is characterized in that wearing layer includes hexsteel and wear-resisting pours
The bed of material is built, hexsteel is layed in guide shell inner wall, and the wear-resisting bed of material that pours is poured through hexsteel in guide shell inner wall.
8. boiler feed back leg expansion joint according to claim 1, which is characterized in that filler insulating layer includes that two pieces of ceramics are fine
Blanket is tieed up, wherein a ceramic fiber blanket is fixed between two pipe nipples through briquetting, another ceramic fiber blanket is fixed on interior through briquetting
Between cylinder and guide shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920433713.5U CN209705517U (en) | 2019-04-01 | 2019-04-01 | A kind of boiler feed back leg expansion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920433713.5U CN209705517U (en) | 2019-04-01 | 2019-04-01 | A kind of boiler feed back leg expansion joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209705517U true CN209705517U (en) | 2019-11-29 |
Family
ID=68648537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920433713.5U Expired - Fee Related CN209705517U (en) | 2019-04-01 | 2019-04-01 | A kind of boiler feed back leg expansion joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209705517U (en) |
-
2019
- 2019-04-01 CN CN201920433713.5U patent/CN209705517U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191129 |