CN211694834U - Sealing device between boiler process pipeline and boiler body - Google Patents
Sealing device between boiler process pipeline and boiler body Download PDFInfo
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- CN211694834U CN211694834U CN201922175988.6U CN201922175988U CN211694834U CN 211694834 U CN211694834 U CN 211694834U CN 201922175988 U CN201922175988 U CN 201922175988U CN 211694834 U CN211694834 U CN 211694834U
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Abstract
The utility model discloses a sealing device between boiler process pipeline and furnace body, including sealed barrel and sealed lid, sealed barrel and sealed lid all are cylindricly, just pass through fastening bolt and connect, sealed lid includes two sealed half lids, sealed barrel also includes two sealed half a section of thick bamboos, be equipped with a plurality of groups of sealing filler in the sealed barrel. The sealing device is of a detachable combined structure, adopts packing materials to perform packing sealing, is simple and convenient to manufacture and install, can be adjusted and repaired on line, is low in maintenance cost, has good sealing and compensating effects, and can effectively improve the level of long-period safe production of the boiler. The sealing device has simple structure, compact combination and wide application range, and is suitable for wide popularization and application.
Description
Technical Field
The utility model relates to a mechanical seal device, concretely relates to sealing device between boiler process pipeline and furnace body.
Background
The boiler is an energy converter, which is a device for heating working medium water or other fluids to certain parameters by using heat energy released by fuel combustion or other heat energy. Pipe holes are formed in the outer wall (and the furnace wall) of the boiler for various process pipelines to penetrate through and enter, so that leakage gaps inevitably exist between the process pipelines and the outer wall of the boiler. Because the flue gas flowing in the boiler usually contains toxic and harmful substances such as sulfur dioxide, nitrogen oxide and the like, and can form corrosive media with water vapor in the flue gas under certain conditions, and the cold and hot expansion amount of the process pipeline under different working conditions is also considered, a stainless steel corrugated pipe expansion joint is generally arranged between the process pipeline of the boiler and a boiler wall, namely a part needing sealing. When the corrugated expansion joint is installed, the corrugated expansion joint is firstly sleeved on the process pipeline, and then two ends of the corrugated expansion joint are respectively in full-welding connection with the outer wall of the furnace body and the outer wall of the process pipeline, so that a seal with a certain displacement compensation function is formed. When the boiler normally operates, the inner cavity of the corrugated expansion joint is in long-term contact with corrosive smoke, and is additionally arranged on the outer wall of a furnace body with a very low temperature compared with a high-temperature environment in the boiler, dew point corrosion is very easy to occur inside the corrugated expansion joint, so that the corrugated expansion joint is gradually corroded, perforated and even damaged and failed along with the extension of the operation time of the boiler. When the expansion joint of the corrugated pipe is corroded, perforated or damaged and fails, smoke in the furnace leaks to the surrounding environment, which is not beneficial to the health of field operation personnel and the safe and environment-friendly production of enterprises.
At present, two repairing methods can be adopted for the damaged and failed bellows expansion joint: firstly, on-line repair, under the condition of normal operation of a boiler, repair welding is carried out on cracks and holes of the expansion joint of the corrugated pipe, but because the shapes of the cracks and the holes are often irregular and the wall thickness of the expansion joint of the corrugated pipe is thin (about one millimeter or two millimeters), the operation difficulty of on-line repair is large, and the repair is difficult to complete; and secondly, the process pipeline is integrally replaced after the boiler is shut down because the bellows expansion joint is integrally sleeved on the process pipeline, and the process pipeline is cut to be integrally replaced after the boiler is shut down, so that the replacement process is complex, the maintenance cost is high, and the normal production of an enterprise is possibly influenced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a be not enough to prior art exists, the utility model provides a sealing device between boiler process pipeline and furnace body, this sealing device adopts packing material to carry out the packing for removable composite construction, makes and simple installation, can online adjustment, restoration, and the maintenance cost is low, and is sealed effectual with the compensation, can effectively improve the long period safety in production's of boiler level. The sealing device has simple structure, compact combination and wide application range, and is suitable for wide popularization and application.
The utility model discloses the technical scheme who takes:
the sealing device between the boiler process pipeline and the boiler body comprises a sealing cylinder body and a sealing cover which can be matched, disassembled and connected, wherein the sealing cylinder body and the sealing cover are both cylindrical, a plurality of cylinder body ear holes are formed in the outer surface of the end part of the sealing cylinder body along the circumferential direction of the sealing cylinder body, sealing cover ear holes which correspond to the cylinder body ear holes are formed in the outer surface of the sealing cover along the circumferential direction of the sealing cylinder body, fastening bolts are arranged between the cylinder body ear holes and the sealing cover ear holes, the sealing cover comprises two sealing half covers which are uniformly arranged along the central axial surface of the sealing cylinder body and are detachably connected, sealing cover connecting plates are arranged on the two side surfaces of the two sealing half covers, sealing cover bolt holes which are coaxially arranged are formed in the sealing cover connecting plates positioned on the same side, sealing cover connecting bolts are arranged in the two sealing cover bolt holes which are coaxially arranged, and the sealing cylinder body also comprises two, the two side faces of the two sealing half cylinders are respectively provided with a cylinder connecting plate, the cylinder connecting plate and the sealing cover connecting plate which are positioned on the same side are positioned on the same straight line, a plurality of groups of coaxially arranged cylinder bolt holes are formed in the cylinder connecting plate positioned on the same side, cylinder connecting bolts are arranged in the coaxially arranged two cylinder bolt holes, and a plurality of groups of sealing fillers are arranged in the sealing cylinder.
As a preferred technical scheme, in order to facilitate the installation and maintenance of the packing material in an annular gap (namely a sealing cavity) between the sealing cylinder and the process pipeline, the fastening and sealing capacity generated by the packing material deforming under pressure in the sealing cavity is further enhanced, and the inner cavity of the sealing cylinder is arranged to be of a taper hole-shaped structure with the levelness of minus five degrees.
As the preferred technical scheme, in order to ensure that the sealing filler is high-temperature resistant and corrosion resistant, can bear the vibration and displacement of a sealing element, and enables the sealing device to have good sealing and compensation effects and be convenient to install, maintain and replace, the sealing filler is a graphite packing and has the specification of 30 multiplied by 30 (mm).
Compared with the prior art, the utility model discloses the beneficial effect who has:
1. the sealing device is of a detachable combined structure, adopts packing materials to perform packing sealing, is simple and convenient to manufacture and install, can be adjusted and repaired on line, is low in maintenance cost, has good sealing and compensating effects, and can effectively improve the level of long-period safe production of the boiler. The sealing device has simple structure, compact combination and wide application range, and is suitable for wide popularization and application.
2. The inner cavity of the sealing cylinder is of a taper hole structure with the levelness of minus five degrees, so that the sealing cover is convenient to mount, the sealing filler is convenient to mount, maintain and replace, and the mounting process of the whole mechanical sealing device is simple and convenient.
3. The graphite packing is used as a sealing filler, and the sealing device has excellent lubricity, high temperature resistance, corrosion resistance, wear resistance and high strength, so that the sealing device has good sealing and compensation effects, and the long-period safe production level of equipment is effectively improved.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a cross-sectional view of the present invention;
reference numerals: 1. 1-1 parts of sealed cylinder, 1-2 parts of cylinder lug holes, 1-3 parts of cylinder connecting plates, 2 parts of sealing covers, 2-1 parts of sealing cover lug holes, 2-2 parts of sealing cover connecting plates, 2-3 parts of sealing cover connecting bolts, 3 parts of fastening bolts, 4 parts of sealing fillers.
Detailed Description
As shown in figure 1, the utility model provides a specific embodiment, a sealing device between a boiler process pipeline and a boiler body, which comprises a sealing cylinder body 1 and a sealing cover 2 which can be matched and disassembled for connection, wherein the sealing cylinder body 1 and the sealing cover 2 are both cylindrical, the diameter of the sealing cylinder body 1 is the same as that of the sealing cover 2, a plurality of cylinder body ear holes 1-1 are arranged on the outer surface of the end part of the sealing cylinder body 1 along the circumferential direction, the sealing cover ear holes 2-1 which are arranged corresponding to the cylinder body ear holes 1-1 are also arranged on the outer surface of the sealing cover 2 along the circumferential direction, the cylinder body ear holes 1-1 and the sealing cover ear holes 2-1 are arranged in a one-to-one correspondence manner, the cylinder body ear holes 1-1 and the sealing cover ear holes 2-1 are arranged in the embodiment and are respectively and uniformly distributed along the outer surface of the end part of the, the cylinder ear hole 1-1 and the sealing cover ear hole 2-1 are both provided with a fastening bolt 3, the fastening bolt 3 is sleeved in the cylinder ear hole 1-1 and the sealing cover ear hole 2-1, then a nut is screwed on to realize the matching disassembly connection between the sealing cylinder 1 and the sealing cover 2, the sealing cover 2 comprises two sealing half covers which are equally arranged along the central axis surface and detachably connected, the sealing cover is divided into two sealing half covers, the two side surfaces of the two sealing half covers are both provided with a sealing cover connecting plate 2-2, the sealing cover connecting plate 2-2 positioned at the same side is provided with a coaxially arranged sealing cover bolt hole, the two coaxially arranged sealing cover bolt holes are provided with sealing cover connecting bolts 2-3, the sealing cover connecting bolts 2-3 are sleeved in the coaxially arranged sealing cover bolt holes to realize the one-in-two-in-detachable connection of the sealing cover 2, the sealing cylinder 1 also comprises two sealing half cylinders which are equally distributed along the central axis surface and detachably connected, the sealing cylinder 1 is divided into two sealing half cylinders, two side surfaces of the two sealing half cylinders are respectively provided with a cylinder connecting plate 1-2, the cylinder connecting plate 1-2 and the sealing cover connecting plate 2-2 which are positioned on the same side are positioned on the same straight line, the cylinder connecting plate 1-2 which is positioned on the same side is provided with a plurality of groups of coaxially arranged cylinder bolt holes, cylinder connecting bolts 1-3 are arranged in the coaxially arranged two cylinder bolt holes, the coaxially arranged cylinder bolt holes are sleeved with the cylinder connecting bolts 1-3, the two-part and detachable connection of the sealing cylinder 1 is realized, in the embodiment, 3 bolt holes are arranged on the cylinder connecting plate 1-2, and the fastening bolt 3 and the sealing cover connecting bolt 2-3, The cylinder connecting bolts 1-3 are all bolts with the strength grade of 8.8, a plurality of groups of sealing fillers 4 are arranged in the sealing cylinder 1, the sealing fillers 4 mainly play a role in sealing annular gaps between the sealing cylinder 1 and a process pipeline, the sealing fillers 4 are deformed under pressure to realize sealing by adjusting the fastening bolts 3 between the cylinder ear holes 1-1 and the sealing cover ear holes 2-1, and 4 groups of sealing fillers 4 are arranged in the embodiment, as shown in fig. 2. In order to reduce the weight of the whole mechanical sealing device and ensure high temperature resistance and corrosion resistance, the sealing cylinder 2 and the sealing cover 2 are both made of boiler steel, and the wall thickness of the sealing cylinder 1 is a uniform value.
The inner cavity of the sealing cylinder body 1 is set to be a taper hole-shaped structure with the levelness of minus five degrees, namely, the inner cavity of the sealing cylinder body is manufactured to be a horn-shaped structure with a large opening and a small opening, so that the sealing filler 4 is convenient to install and maintain in an annular gap (namely a sealing cavity) between the sealing cylinder body 1 and a process pipeline, and the fastening sealing capability generated by the compression deformation of the sealing filler 4 in the sealing cavity is further enhanced.
The sealing packing 4 is a graphite packing, the specification is 30 multiplied by 30(mm), the graphite packing is mainly formed by finely weaving various reinforced graphite wires such as reinforced fibers, metal wires (steel wires, copper wires, nickel wires, carbon fibers, pre-oxidized wires and glass yarns) as raw materials, the dynamic sealing device is suitable for dynamic sealing under the conditions of high temperature and high pressure, the graphite packing is selected as the sealing packing 4, the sealing packing is guaranteed to be high temperature resistant and corrosion resistant, vibration and displacement of a sealing piece can be borne, the sealing device has good sealing and compensation effects, and meanwhile installation, maintenance and replacement are facilitated.
The utility model discloses during the installation: firstly, sleeving two sealing half cylinders on a process pipeline, screwing all cylinder connecting bolts 1-3, and then welding and connecting the sealing cylinder 1 and the outer wall of a boiler; then, 4 graphite packing roots are filled in an annular space formed by the sealing barrel 1 and the process pipeline in a disc pressing mode for sealing, and the notches of the graphite packing roots are arranged in a staggered mode; sleeving the two sealing half covers on the process pipeline, and screwing down all the sealing cover connecting bolts 2-3; and finally, assembling and connecting the sealing barrel 1 and the sealing cover 2 by using a fastening bolt 3, and extruding and deforming the graphite packing by adjusting the fastening force of the fastening bolt 3 to complete the sealing between the boiler process pipeline and the boiler wall. Before installation, a welding area of the outer wall of the boiler is polished, an anticorrosive layer and a corrosion layer of the boiler wall are removed, and after welding is completed, anticorrosive treatment is timely carried out; in the area of the process pipeline coiled with the graphite packing, the outer wall of the pipeline is also polished in advance to ensure that the surface of the pipeline is smooth and regular, so that the pipeline can be stretched and contracted well after being provided with a sealing device, and the abrasion to the graphite packing during the stretching and contraction of the pipeline is reduced. In addition, reasonable welding installation positions and angles are reserved for the whole sealing device, and field installation and construction and future maintenance and replacement are convenient to carry out.
The mechanical sealing device can be installed and used on a boiler, can realize the establishment of long-acting and reliable sealing and compensation relation between process equipment and a process pipeline in similar workplaces, has simple structure, compact combination, easy operation, easily obtained materials, high temperature resistance, corrosion resistance, wear resistance and high strength, and has good practical value and higher popularization value.
Of course, the above detailed description is only made for the preferred embodiments of the present invention with reference to the accompanying drawings, and not to limit the scope of the present invention, and all equivalent changes made according to the principles, structures and structures of the present invention should be covered by the protection scope of the present invention.
Claims (3)
1. The sealing device between the boiler process pipeline and the boiler body is characterized in that: the sealing device comprises a sealing cylinder body (1) and a sealing cover (2) which can be matched, disassembled and connected, wherein the sealing cylinder body (1) and the sealing cover (2) are both cylindrical, a plurality of cylinder body ear holes (1-1) are formed in the outer surface of the end part of the sealing cylinder body (1) along the circumferential direction of the sealing cylinder body, sealing cover ear holes (2-1) corresponding to the cylinder body ear holes (1-1) are formed in the outer surface of the sealing cover (2) along the circumferential direction of the sealing cylinder body, fastening bolts (3) are arranged between the cylinder body ear holes (1-1) and the sealing cover ear holes (2-1), the sealing cover (2) comprises two sealing half covers which are equally arranged along the central axial surface and detachably connected, sealing cover connecting plates (2-2) are arranged on the two side surfaces of the two sealing half covers, and sealing cover bolt holes which are coaxially arranged are formed in the sealing cover connecting plates (2-2, the sealing barrel body (1) also comprises two sealing half barrels which are equally divided along the central axis surface and can be detachably connected, barrel connecting plates (1-2) are arranged on the two side surfaces of the two sealing half barrels, the barrel connecting plates (1-2) positioned on the same side and the sealing connecting plates (2-2) are positioned on the same straight line, a plurality of groups of coaxially arranged barrel bolt holes are formed in the barrel connecting plates (1-2) positioned on the same side, the barrel connecting bolts (1-3) are arranged in the two coaxially arranged barrel bolt holes, and a plurality of groups of sealing fillers (4) are arranged in the sealing barrel body (1).
2. The sealing device between the boiler process pipeline and the boiler body according to claim 1, characterized in that: the inner cavity of the sealing cylinder body (1) is of a taper hole structure with the levelness of minus five degrees.
3. The sealing device between the boiler process pipe and the furnace body according to claim 1 or 2, characterized in that: the sealing packing (4) is a graphite packing and has a specification of 30 multiplied by 30 (mm).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922175988.6U CN211694834U (en) | 2019-12-06 | 2019-12-06 | Sealing device between boiler process pipeline and boiler body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922175988.6U CN211694834U (en) | 2019-12-06 | 2019-12-06 | Sealing device between boiler process pipeline and boiler body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211694834U true CN211694834U (en) | 2020-10-16 |
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ID=72790053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922175988.6U Active CN211694834U (en) | 2019-12-06 | 2019-12-06 | Sealing device between boiler process pipeline and boiler body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211694834U (en) |
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2019
- 2019-12-06 CN CN201922175988.6U patent/CN211694834U/en active Active
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