CN204853463U - Expansion joint of improvement - Google Patents
Expansion joint of improvement Download PDFInfo
- Publication number
- CN204853463U CN204853463U CN201520530862.5U CN201520530862U CN204853463U CN 204853463 U CN204853463 U CN 204853463U CN 201520530862 U CN201520530862 U CN 201520530862U CN 204853463 U CN204853463 U CN 204853463U
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- suction hood
- negative
- expansion joint
- gland
- boiler
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Abstract
The utility model discloses an expansion joint of improvement sets up the below of cinder notch under the boiler, include into sediment pipe, negative pressure suction hood, gland, apron, clamping ring, advance the sediment fill, the negative pressure suction hood sets up on the apron, the negative pressure suction hood top left and right sides is equipped with the elbow respectively, the elbow passes through the flange and is connected with a metal collapsible tube, boiler negative pressure aspiration channel is connected to the metal collapsible tube other end, the round hole has all been opened on the intermediate position of negative pressure suction hood, gland, clamping ring, wear to establish into sediment pipe in the round hole, it is connected with the lower cinder notch of boiler to enter sediment pipe upper portion, it sets up to enter sediment socle portion advance the intracavity that the sediment was fought, the utility model discloses expansion joint of improvement, the structure is compacter, and the installation is simple and easy, and is longe -lived, and daily operation operating repair volume is little, and is more applicable in the narrow and small operating mode in factory building space, and the leakproofness is better, can reach safe actual requirement of carrying out production strictly in line with rules and regulations.
Description
Technical field
The utility model relates to a kind of elevated-temperature seal compensation arrangement, is specifically related to a kind of expansion joint of improvement.
Background technology
CFBB is a kind of low stain, environment-friendly type, clean burning boiler, it adopts stove combustion sulfur removal technology, achieve effectively removing of sulfide and nitrogen oxide by recirculating fluidized bed low-temperature burning, thus the discharge of pollutant in flue gas can be greatly reduced.
Red-hot lime-ash can be produced in CFBB running, lime-ash from boiler slag removal mouth by scum pipe to deslagging in lag cooler.Because boiler is opening, stopping there is very large thermal expansion amount in process, may be that axially (i.e. vertical direction) expands also may be radial (i.e. horizontal direction) expansion, or the two has concurrently, and lag cooler is fixing immovable, therefore, connect the Residue extraction pipeline between boiler slag removal mouth and lag cooler slag inlet must install can vertical contraction again can the expansion joint that offsets of level, to meet boiler expansion demand, be separated to avoid scum pipe and lag cooler.
The kind of expansion joint is a lot of on the market at present, result of use is high-temperature resistant corrugated expansion joint preferably, but because its structure limits, stock size is all very large, be applicable to the larger condition of large-sized unit and boiler of power plant space, but because the unit capacity of power plant is different, the form of boiler and size are not identical yet, so not every power plant can meet it install and use condition, for the power plant that hall space is narrow and small, current then generally use the version of " light pipe+cover plate+slag bucket ", namely light pipe is inserted in cover plate, and between cover plate and light pipe, leave certain gap, cover plate also can be free to slide with the movement of light pipe on slag bucket, to meet boiler expansion requirement, but the actual running results shows, although this kind of structure is simple and easy to do, but sealing effectiveness is very poor, exist in varying degrees and leak slag, leak grey phenomenon, can not meet the needs that Modern Power Plant is carried out production strictly in line with rules and regulations, sometimes the red slag temperatures as high 900 DEG C sprayed, also the danger that maintainer and other equipment are damaged is had, also requirement of carrying out production strictly in line with rules and regulations is not met, therefore can boiler expansion be met and features simple structure in the urgent need to one, good sealing effect and the little expansion joint of space hold.
The expansion joint patent of our company's application number: CN201020223361.X, structure is simple, good sealing effect, but in the middle of reality uses, especially after long-term work wearing and tearing, still unavoidable appearance seal clearance, have a small amount of thin ash to spill from each gap location, affect production environment.
Utility model content
Of the present utility modelly be intended to solve above-mentioned technical problem and provide a kind of expansion joint entering the improvement between cinder notch being arranged on boiler slag removal mouth and lag cooler, its features simple structure is compact, better by sealing effectiveness, and is convenient to operating repairs.
In order to solve the problem, the technical solution adopted in the utility model is: a kind of expansion joint of improvement, be arranged on the below of boiler roughing slag mouth, comprise slag feed pipe, negative-pressure dust suction hood, gland, cover plate, trim ring, dreg-inlet hopper, described negative-pressure dust suction hood is arranged on the cover board, the left and right sides, described negative-pressure dust suction hood top is respectively equipped with elbow, described elbow is by flange and a connection by metal hose, the described metal hose other end connects boiler negative pressure sucking air pipe, described negative-pressure dust suction hood, gland, the centre position of trim ring all has circular hole, slag feed pipe is worn in described circular hole, described slag feed pipe top is connected with the lower cinder notch of boiler, be arranged on bottom described slag feed pipe in the chamber of described dreg-inlet hopper, described gland is arranged in negative-pressure dust suction hood, described gland and described trim ring are spirally connected, described cover plate and described dreg-inlet hopper are spirally connected.
Preferably, the lower surface of described negative-pressure dust suction hood and the upper surface of described cover plate are smooth plane.
Preferably, the clearance distance of the external diameter of described circular hole and described slag feed pipe is: 1.5-2mm.
Preferably, alumina-silica fire cotton is provided with between described gland and described trim ring.
Preferably, alumina-silica fire cotton is filled out between described cover plate and described dreg-inlet hopper.
Beneficial effect: the expansion joint that the utility model proposes a kind of improvement, structure is compacter, installs simple and easy, life-span is long, and day-to-day operation Maintenance and Repair amount is little, is more applicable to the operating mode that hall space is narrow and small, and better tightness, meanwhile, owing to employing negative-pressure dust suction hood, even if long-term work, occur wearing and tearing between part fits, the thin ash no matter spilt is how many, how little granularity is, all to be siphoned away by negative pressure wind, to reach the effect of " dripping slag not leak ", meet the actual requirement of modernization safe and civilized production.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation
Fig. 2 is that the utility model disassembles schematic diagram
Fig. 3 is utility model works view.
Detailed description of the invention
Below, in conjunction with example, substantive distinguishing features of the present utility model and advantage are further described, but the utility model is not limited to listed embodiment.
Refer to shown in Fig. 1 ~ 3, the figure shows the structure of the high-temperature expansion joint of a kind of improvement described in the utility model embodiment, for convenience of explanation, illustrate only the part that the utility model embodiment is relevant.
Refer to shown in Fig. 1, Fig. 2, the utility model comprises the parts such as metal hose 1, elbow 2, slag feed pipe 3, negative-pressure dust suction hood 4, gland 5, cover plate 6, trim ring 7, dreg-inlet hopper 8, alumina-silica fire cotton 9, bolt and nut, wherein metal hose 1 and elbow 2 pass through together with Flange joint, effect is air inducing, be connected with boiler negative pressure sucking air pipe by metal hose 1, maintain the negative pressure state in negative-pressure dust suction hood 4, prevent lime-ash from overflowing since then, because metal hose 1 has good pliability, the two-dimension displacement in negative-pressure dust suction hood 4 horizontal direction can be met; Negative-pressure dust suction hood 4 top has circular hole, this circular hole size is bigger compared with slag feed pipe 3 external diameter, and the two gap, between 1.5mm-2mm, is convenient to be inserted into wherein by slag feed pipe 3 when installing, negative-pressure dust suction hood 4 lower surface is smooth, can smooth and easy slip on cover plate 6 under self gravitation effect; Same, gland 5 and trim ring 7 all have the circular hole bigger compared with slag feed pipe 3 external diameter, gland 5 is tightened together by bolt and nut with trim ring 7, alumina-silica fire cotton 9 in order to will fill between gland 5 and trim ring 7 compresses, meanwhile, the compaction degree of alumina-silica fire cotton 9 regulates by bolt and nut; Described cover plate 6 links together with dreg-inlet hopper 7, therebetween alumina-silica fire cotton 9 is also filled in order to seal lime-ash leakage channel, of course, the alumina-silica fire cotton that the utility model adopts is only a kind of embodiment as filler, also have other alternative schemes some: such as: nickel wire packing, ceramic fiber cotton etc., in the present embodiment, preferably alumina-silica fire is cotton, cover plate 6 upper surface is smooth, in order to meet the horizontal slip requirement of negative-pressure dust suction hood 4; Dreg-inlet hopper 8 is made up of high temperature resistant stainless steel, in order to receive the lime-ash of discharging from slag feed pipe 3, slag feed pipe 3 inserts and wherein forms sleeve type structure, and trim ring 7 can be free to slide on slag feed pipe 3 top, trim ring 7 and dreg-inlet hopper 8 form labyrinth seal structure and prevent lime-ash from overflowing, and dreg-inlet hopper 8 bottom is connected with the slag inlet of lag cooler.
During use, refer to shown in Fig. 3, the slag feed pipe 3 of this expansion joint is connected with boiler roughing slag mouth, dreg-inlet hopper 8 bottom is connected with the slag inlet of lag cooler, and metal hose 1 is connected with boiler negative-pressure air-suction guard system, maintain negative-pressure dust suction hood 4 internal negative pressure state, metal hose 1 suppleness is better, also can meet the horizontal displacement change requirement of negative-pressure dust suction hood 4; When boiler operatiopn produces thermal expansion phenomenon, all thermal walking is there is in level and vertical direction in boiler slag removal mouth together with slag feed pipe 3, now slag feed pipe 3 horizontal direction can drive negative-pressure dust suction hood 4, gland 5, trim ring 7 to be free to slide in the horizontal direction, namely negative-pressure dust suction hood 4 is pressed on cover plate 6 under himself Action of Gravity Field, contact surface is smooth, can be free to slide, trim ring 7 contacts with dreg-inlet hopper 8, can also be free to slide; And the aperture of negative-pressure dust suction hood 4, gland 5, trim ring 7 is all slightly larger than slag feed pipe 3 external diameter, therefore slag feed pipe vertical direction can free wxpansion not interrupted, because being all filled with alumina-silica fire cotton 9 between trim ring 7 and gland 5 and between cover plate 6 and dreg-inlet hopper 8, its sealing is better, there is good sealing, ductility, and be convenient to compression, therefore obstruction can not be produced to the horizontal expansion of gland 5, trim ring 7; Gland 5, between trim ring 7 and slag feed pipe 3, there is small―gap suture; lime-ash is likely overflowed since then; but because there is the filling of alumina-silica fire cotton 9; the lime-ash of most effusion can be intercepted, even if the fine grained lime-ash having minority to overflow, negative-pressure dust suction hood 4 can be entered inner after labyrinth seal; and negative-pressure dust suction hood 4 inside is negative pressure state; the lime-ash entered wherein can be sucked away and enter boiler tail electrostatic precipitator under negative pressure wind action, can not overflow, thus maintains on-the-spot cleaning.Please continue to refer to Fig. 3, be expansion joint state operationally, wherein 81 is lime-ash, 31 is the original position of slag feed pipe, 32 is the position of slag feed pipe after occurred level and vertical displacement change, the horizontal direction swell increment that X absorbs for expansion joint, the vertical direction swell increment that Y absorbs for expansion joint, the concrete data of X, Y can be determined according to on-site actual situations herein.
The above is only preferred embodiment of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (5)
1. the expansion joint of an improvement, it is characterized in that, be arranged on the below of boiler roughing slag mouth, comprise slag feed pipe, negative-pressure dust suction hood, gland, cover plate, trim ring, dreg-inlet hopper, described negative-pressure dust suction hood is arranged on the cover board, the left and right sides, described negative-pressure dust suction hood top is respectively equipped with elbow, described elbow is by flange and a connection by metal hose, the described metal hose other end connects boiler negative pressure sucking air pipe, described negative-pressure dust suction hood, gland, the centre position of trim ring all has circular hole, slag feed pipe is worn in described circular hole, described slag feed pipe top is connected with the lower cinder notch of boiler, be arranged on bottom described slag feed pipe in the chamber of described dreg-inlet hopper, described gland is arranged in negative-pressure dust suction hood, described gland and described trim ring are spirally connected, described cover plate and described dreg-inlet hopper are spirally connected.
2. the expansion joint of a kind of improvement as claimed in claim 1, is characterized in that, the lower surface of described negative-pressure dust suction hood and the upper surface of described cover plate are smooth plane.
3. the expansion joint of a kind of improvement as claimed in claim 1, is characterized in that, the clearance distance of the external diameter of described circular hole and described slag feed pipe is: 1.5-2mm.
4. the expansion joint of a kind of improvement as claimed in claim 1, is characterized in that, is provided with alumina-silica fire cotton between described gland and described trim ring.
5. the expansion joint of a kind of improvement as claimed in claim 1, is characterized in that, fills out alumina-silica fire cotton between described cover plate and described dreg-inlet hopper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520530862.5U CN204853463U (en) | 2015-07-22 | 2015-07-22 | Expansion joint of improvement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520530862.5U CN204853463U (en) | 2015-07-22 | 2015-07-22 | Expansion joint of improvement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204853463U true CN204853463U (en) | 2015-12-09 |
Family
ID=54744005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520530862.5U Expired - Fee Related CN204853463U (en) | 2015-07-22 | 2015-07-22 | Expansion joint of improvement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204853463U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210148497A1 (en) * | 2018-04-05 | 2021-05-20 | Petroleo Brasileiro S.A. - Petrobras | Telescopic joint |
-
2015
- 2015-07-22 CN CN201520530862.5U patent/CN204853463U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210148497A1 (en) * | 2018-04-05 | 2021-05-20 | Petroleo Brasileiro S.A. - Petrobras | Telescopic joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151209 Termination date: 20210722 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |