CN214120116U - Long-life sealing device for rotary air preheater of thermal power boiler - Google Patents
Long-life sealing device for rotary air preheater of thermal power boiler Download PDFInfo
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- CN214120116U CN214120116U CN202023046319.8U CN202023046319U CN214120116U CN 214120116 U CN214120116 U CN 214120116U CN 202023046319 U CN202023046319 U CN 202023046319U CN 214120116 U CN214120116 U CN 214120116U
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- sealing strip
- sector plate
- spring
- air preheater
- thermal power
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model provides a pair of a long-life sealing device for thermal power boiler rotary air heater, including the sector plate, the sealing strip, a supporting beam, a spring, the support sleeve pipe, the locating piece, pressure pretension bolt, connecting bolt, the air preheater rotor, through laying the high manganese steel wearing layer on the sector plate, the difference in the aspect of wear resistance has been increased between sector plate rotor and the sealing strip, and the hardness difference between the two has been increased, thereby make wearing and tearing mainly take place in the sealing strip side, and simultaneously, nimble regulation through pressure pretension bolt, the packing force between sector plate and the sealing strip has significantly reduced, the wearing and tearing problem of sector plate has not only been solved, and make air preheater power consumption reduce. In addition, the height of the sealing strip can be adjusted within a large range through the position adjusting hole, the effective use height of the sealing strip is increased, and the whole service life of the sealing strip is prolonged.
Description
Technical Field
The utility model belongs to the sealed field of thermal power boiler rotation air heater, concretely relates to long-life sealing device for thermal power boiler rotation air heater.
Background
The large-scale thermal power boiler usually adopts a rotary air preheater to heat cold air, and the heating mode has the advantages of high heat transfer efficiency, small occupied area and the like, but also has the problem of more air leakage. In order to reduce air leakage, a sealing device needs to be designed between a movable part and a static part of the rotary air preheater, but the sealing device has the problems of serious abrasion and short service life, and the workload of overhaul and maintenance is increased. And the sealing device increases the resistance between the dynamic part and the static part of the air preheater and increases the power consumption of the air preheater.
SUMMERY OF THE UTILITY MODEL
The utility model provides a sealing device life-span that exists to rotary air heater is short, maintenance work load is big to and the high problem of air heater power consumption, the utility model provides a principle is advanced, simple structure's the long-life sealing device that can be used to rotary air heater of thermal power boiler. The utility model aims at prolonging the service life of the sealing device greatly, lightening the maintenance workload and reducing the power consumption of the rotary air preheater.
The utility model provides an above-mentioned technical problem's technical scheme as follows:
the utility model provides a long-life sealing device for rotary air preheater of thermal power boiler, including sector plate, sealing strip, a supporting beam, spring, support sleeve pipe, locating piece, pressure pretension bolt, connecting bolt, air preheater rotor, supporting beam welded mounting is at the up end of air preheater rotor, processing has the position control hole that height is L2 on the supporting beam, processing has the bolt mounting hole in the lower part of locating piece, connecting bolt passes bolt mounting hole and position control hole and can fasten a supporting beam and locating piece and be connected, the left part of locating piece is equipped with the internal thread, processing has the external screw thread pressure pretension bolt outer wall, pressure pretension bolt and locating piece are connected through external screw thread and internal thread, pressure pretension bolt central point processing has the ash falling hole, pressure pretension bolt's top installation spring, the supporting sleeve cover is located outside the spring, the external diameter of spring slightly is less than supporting sleeve's internal diameter, supporting sleeve's bottom and locating piece welding prevent that the spring from taking place the incline, and avoid the spring rupture the sealing strip that highly is L1 is installed to the top of spring, the external diameter of sealing strip slightly is less than supporting sleeve's internal diameter, the lower extreme of sealing strip can stretch into from supporting sleeve's up end to with the up end in close contact with of spring the top of sealing strip is equipped with the sector plate, zero clearance in close contact with is realized with the sealing strip under the pressure effect of spring to the sector plate.
As a further improvement of the scheme, buffering guide plates are welded on two sides of the sector plates.
As a further improvement of the scheme, the lower part of the sector plate is provided with a high manganese steel wear-resistant layer, the lower part of the buffer guide plate is provided with an arc streamline wear-resistant layer, and the arc streamline wear-resistant layer and the high manganese steel wear-resistant layer are in smooth transition connection.
As a further improvement of the scheme, a dustproof hairbrush can be arranged between the supporting sleeve and the sealing strip so as to further improve the sealing performance.
As a further improvement of the above solution, the effective working height L1 of the sealing strip is not less than 1 mm.
As a further improvement of the above aspect, the height L2 of the position adjustment hole is not less than L1.
Compared with the prior art, the beneficial effects of the utility model are as follows:
1. the utility model discloses can slow down the wearing and tearing speed of sector plate greatly, reach its life's of extension purpose. Can be described as: according to rotary air heater's theory of operation, the sector plate is in the stationary state all the time in the course of the work, and the sealing strip then is in rotatory state, and in order to prevent to leak out, must in close contact with between sector plate and the sealing strip, consequently in long-term course of the work, sealing strip and sector plate will inevitably take place wearing and tearing, nevertheless the wearing and tearing speed of sector plate is slower, the reason has two: (1) the lower end face of the sector plate is coated with a high manganese steel wear-resistant layer, the hardness is higher, and the wear resistance is far stronger than that of the material adopted by the sealing strip, so that the sealing strip is mainly worn in the wearing process, and the sector plate is basically not worn or only rarely worn; (2) the pressing force between the sector plate and the sealing strip has a great influence on the wear rate of the sector plate. In the prior art, in order to make the sector plate and the sealing strip work in a close contact state for a longer time, the pressing force can be designed to be larger, because if the pressing force is smaller, namely the precompression of the spring is smaller, the spring is quickly restored to the original length along with the gradual abrasion of the sector plate and the sealing strip in the working process, so that the sector plate and the sealing strip can not be kept in the close contact state, and therefore, the pressing force between the sector plate and the sealing strip can only be increased, which inevitably leads to the rapid abrasion of the sector plate. However, in the present invention, the pressing force between the sector plate and the sealing strip can be designed to be small because: the utility model discloses a packing force between sector plate and the sealing strip can be adjusted through pressure pretension bolt in a flexible way, conveniently. Therefore, in the actual working process, when the sector plate and the sealing strip are abraded, and the pressing force between the sector plate and the sealing strip is lower than a set value, the compression amount of the spring can be increased by only screwing the pressure pre-tightening bolt upwards, so that the pressing force between the sector plate and the sealing strip is increased to an initial design value. Therefore, the utility model does not need to apply larger initial pressure between the sector plate and the sealing strip, thereby reducing the abrasion to the sector plate.
2. The utility model discloses can reduce the electric energy that rotary air heater consumed. This is because: the rotor of the rotary air preheater is driven by a motor to rotate, and electric energy is inevitably consumed in the rotating process. The larger the frictional resistance between the sector plate and the air preheater rotor is, the more the electric energy is consumed. In the conventional technology, as the pressing force between the sector plate and the sealing strip is larger, great resistance is generated between the sealing strip and the sector plate, and more electric energy is consumed to drive the air preheater rotor to rotate. The utility model greatly reduces the pressing force between the sector plate and the sealing strip, so the resistance of the rotor of the air preheater is greatly reduced, and the electric energy consumed by the motor is correspondingly reduced.
3. The utility model discloses can prolong the whole life of sealing strip greatly. Hardness and the wearability of sealing strip all will be poor than the high manganese steel wearing layer of sector plate, consequently in actual process, sector plate does not basically take place wearing and tearing, and the sealing strip is then worn and torn more, nevertheless the whole life-span of sealing strip still will exceed prior art far away, the reason as follows: (1) the packing force between the sealing strip and the sector plate of the utility model is smaller, and the generated abrasion is correspondingly less; (2) the utility model discloses processing has the position control hole on a supporting beam, can follow the vertical direction and remove a whole set of sealing device including the sealing strip, promptly: when discovering the sealing strip and taking place wearing and tearing, only need loosen connecting bolt, just can upwards remove the suitable position along position control hole with a whole set of sealing device, can come into use once more with the connecting bolt fastening again. (3) The installation position of the sealing strip in the conventional technology is fixed and cannot be adjusted, in this case, the length of the sealing strip is usually only about 50mm, and if the length of the sealing strip is further prolonged, the sealing strip and the sector plate cannot be in direct contact once worn, and at the moment, even if the sealing strip has a long margin, the sealing strip cannot play a role. However the utility model discloses then different, can be through the mode of moving the locating piece on, the rebound sealing strip, simultaneously, can also be through upwards rotatory pressure pretension bolt for the sealing strip rebound, consequently the utility model discloses the operating position of sealing strip can be removed in a flexible way, so, the sealing strip just can design longer, when it takes place wearing and tearing, as long as the rebound sealing strip just can continue to use, the utility model discloses an effective height L1 of sealing strip is not less than 200mm, has reached 4 times of conventional sealing strip, leaves sufficient wearing and tearing surplus, thereby makes the life-span of a whole set of sealing device obtain further extension.
4. The spring of the utility model has longer service life. This is because: (1) the utility model discloses protect spring mounting in supporting the sleeve, and the external diameter of spring only slightly is less than supporting sleeve's internal diameter, so the spring can obtain the fine protection of supporting sleeve, can prevent that the spring from taking place the incline, avoids the rupture. (2) The external diameter of sealing strip slightly is less than supporting sleeve's internal diameter, and the small clearance between supporting sleeve and the sealing strip adopts dustproof brush to seal, consequently can prevent effectively that the flying dust in the flue gas from entering into the spring inside, simultaneously, processing has the ash hole that falls on the pressure early warning bolt, even there is a small amount of flying dust to enter into the spring inside, also can drop from the bottom to guarantee can not take place the flying dust deposit in the spring is inside, lead to the spring inefficacy.
5. The utility model discloses rotary air heater sealing device's that can significantly reduce maintenance work volume. This is because: (1) to rotary air heater, the sector plate is bulky, need just can overhaul the maintenance with whole air preheater disintegration, therefore work load is very big, the utility model discloses can alleviate the wearing and tearing speed of sector plate greatly, can greatly alleviate work load. (2) The utility model discloses a life-span of sealing strip has also obtained the improvement, overhauls correspondingly and maintains that the work load also reduces in step.
Drawings
Fig. 1 is a schematic structural diagram of a long-life sealing device for a rotary air preheater of a thermal power boiler according to the present invention;
fig. 2 is a schematic view of the position adjusting hole of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1-2, the long-life sealing device for the rotary air preheater of the thermal power boiler in the embodiment includes a sector plate 1, a sealing strip 3, a support beam 5, a spring 6, a support sleeve 7, a positioning block 8, a pressure pre-tightening bolt 9, a connecting bolt 10, and an air preheater rotor 11.
The support beam 5 is welded and installed on the upper end face of the air preheater rotor 11, a position adjusting hole 501 with the height of L2 is processed on the support beam 5, a bolt installing hole 802 is processed on the lower portion of the positioning block 8, and the support beam 5 and the positioning block 8 can be tightly connected through a connecting bolt 10 penetrating through the bolt installing hole 802 and the position adjusting hole 501.
The left part of locating piece 8 is equipped with internal thread 801, external screw thread 901 has been processed at pressure pretension bolt 9 outer wall, pressure pretension bolt 9 and locating piece 8 are connected through external screw thread 901 and internal thread 801, pressure pretension bolt 9 central point puts and has been processed the ash hole 902, the top installation spring 6 of pressure pretension bolt 9, support sleeve 7 cover is located outside the spring 6, the external diameter of spring 6 slightly is lighter than the internal diameter of support sleeve 7, the bottom and the locating piece 8 welding of support sleeve 7, prevent that spring 6 from taking place the skew, and avoid spring 6 to break, install the sealing strip 3 that highly is L1 in the top of spring 6, the effective height L1 of sealing strip 3 is not less than 200mm, and the height L2 of position control hole 501 is not less than L1. The external diameter of sealing strip 3 slightly is less than supporting sleeve 7's internal diameter, and the lower extreme of sealing strip 3 can stretch into from supporting sleeve 7 upper end mouth, and the outer wall of sealing strip 3 and supporting sleeve 7's inner wall laminates as far as, improves its sealing performance, and but both relative sliding, and supporting sleeve 7 upper end mouth department can set up dustproof brush 4 and further improves the leakproofness between supporting sleeve 7 and the sealing strip 3. The very little consequently adoption dustproof brush 4 of gap is sealed between support sleeve 7 and sealing strip 3, can prevent effectively that the flying dust in the flue gas from entering into spring 6 inside, simultaneously, processing has ash falling hole 902 on pressure early warning bolt 9, even there is a small amount of flying dust to enter into spring 6 inside, also can follow ash falling hole 902 lower extreme export and drop to guarantee can not take place the flying dust deposit in spring 6 is inside, lead to spring 6 to become invalid.
The top of the sealing strip 3 is provided with a sector plate 1, two sides of the sector plate 1 are respectively welded with a buffer guide plate 2, the lower part of the sector plate 1 is laid with a high manganese steel wear-resistant layer 101, the high manganese steel wear-resistant layer has higher hardness and far stronger wear resistance than the material adopted by the sealing strip, so that the sealing strip 3 is mainly worn, and the sector plate 1 is basically not worn or only rarely worn in the wearing process; the lower part of the buffer guide plate 2 is laid with an arc streamline wear-resistant layer 201, and smooth transition connection can be realized between the arc streamline wear-resistant layer 201 and the high manganese steel wear-resistant layer 101. The sector plate 1 and the sealing strip 3 are in gapless tight contact under the pressure action of the spring 6.
The pressing force between the sector plate 1 and the sealing strip 3 has a great influence on the wear rate of the sector plate 1. In the prior art, in order to operate the sector plate 1 and the sealing strip 3 in a close contact state for a longer time, the pressing force can be designed to be larger, because if the pressing force is smaller, that is, the pre-compression amount of the spring 6 is smaller, the spring 6 is quickly restored to the original length along with the gradual abrasion of the sector plate 1 and the sealing strip 3 during the operation, so that the sector plate 1 and the sealing strip 3 can not be maintained in the close contact state, and the sector plate 1 is abraded quickly. And in the utility model discloses in, the packing force between sector plate 1 and the sealing strip 3 can be designed less, in the course of the work, if sector plate 1 and sealing strip 3 have taken place wearing and tearing, then can utilize the blowing out opportunity of minor overhaul or overhaul, through adjusting pressure pretension bolt 9, make the packing force between sector plate 1 and the sealing strip 3 resume initial design value, when fan-shaped arc and sealing strip 3 take place wearing and tearing promptly, spring 6 compression volume reduces, only need upwards twist pressure pretension bolt 9 this moment, can increase spring 6 compression volume, thereby increase the packing force between sector plate 1 and the sealing strip 3 to initial design value. Therefore, the utility model does not need to apply larger initial pressure between the sector plate 1 and the sealing strip 3, thereby reducing the abrasion to the sector plate 1.
In addition, the hardness and the wear resistance of the sealing strip 3 are poorer than those of the high manganese steel wear-resistant layer of the sector plate 1, so that the sector plate 1 is not worn basically in practical use, the sealing strip 3 is worn relatively more, but the whole service life of the sealing strip 3 is still far longer than that of the prior art because the pressing force between the sealing strip 3 and the sector plate 1 is smaller. Moreover, even if the weather strip 3 is worn, the entire sealing device is moved upward to an appropriate position along the position adjusting hole 501, and the connecting bolt 10 is tightened again, whereby the weather strip 33 and the sector plate 1 can be brought into close contact with each other.
Since the sealing strip 3 of the prior art has no adjusting function, it makes no sense to design the sealing strip 3 longer in the prior art, and the height is usually selected to be about 50 mm. And the utility model discloses the design of well sealing strip 3 is longer, and L1 is not less than 200mm, makes it have sufficient wearing and tearing surplus, can recycle through adjusting to make a whole set of sealing device's life-span obtain further extension.
The utility model discloses can reduce the electric energy that rotary air heater consumed. This is because: the rotary air preheater rotor 11 is driven by a motor to rotate, and electric energy is inevitably consumed in the rotating process. In the conventional technology, as the pressing force between the sector plate 1 and the sealing strip 3 is large, the sealing strip 3 forms a large resistance to the sector plate 1, and the motor consumes more electric energy to drive the air preheater rotor 11 to rotate. The utility model greatly reduces the pressing force between the sector plate 1 and the sealing strip 3, so the resistance of the rotor 11 of the air preheater is greatly reduced, and the electric energy consumed by the motor is correspondingly reduced.
To rotary air heater, sector plate 1 is bulky, need just can overhaul the maintenance with whole air preheater disintegration, therefore work load very big, the utility model discloses can alleviate sector plate 1's rate of wear greatly, can greatly alleviate work load. The service life of the sealing strip is prolonged, and correspondingly, the workload of overhauling and maintaining is synchronously reduced.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. The utility model provides a long-life sealing device for thermal power boiler rotary air heater which characterized in that: the device comprises a sector plate (1), a sealing strip (3), a supporting beam (5), a spring (6), a supporting sleeve (7), a positioning block (8), a pressure pre-tightening bolt (9), a connecting bolt (10) and an air preheater rotor (11), wherein the supporting beam (5) is welded and installed on the upper end face of the air preheater rotor (11), a position adjusting hole (501) with the height of L2 is processed on the supporting beam (5), a bolt mounting hole (802) is processed on the lower portion of the positioning block (8), the connecting bolt (10) penetrates through the bolt mounting hole (802) and the position adjusting hole (501) to enable the supporting beam (5) and the positioning block (8) to be tightly connected, an internal thread (801) is arranged on the left portion of the positioning block (8), an external thread (901) is processed on the outer wall of the pressure pre-tightening bolt (9), and the pressure pre-tightening bolt (9) and the positioning block (8) are connected through the external thread (901) and the internal thread (801), pressure pretension bolt (9) central point puts processing and has ash falling hole (902), top installation spring (6) of pressure pretension bolt (9), support sleeve (7) cover is located outside spring (6), the external diameter of spring (6) slightly is less than the internal diameter of support sleeve (7), the bottom and locating piece (8) welding of support sleeve (7) prevent that spring (6) from taking place the skew, and avoid spring (6) rupture the sealing strip (3) that highly is L1 are installed to the top of spring (6), the external diameter of sealing strip (3) slightly is less than the internal diameter of support sleeve (7), the lower extreme of sealing strip (3) can stretch into from the last port of support sleeve (7) to with the up end in close contact with of spring (6) the top of sealing strip (3) is equipped with sector plate (1), sector plate (1) and sealing strip (3) realize gapless in close contact under the pressure effect of spring (6).
2. The long life seal for a rotary air preheater of a thermal power boiler as set forth in claim 1, wherein: and buffer guide plates (2) are welded on two sides of the sector plate (1).
3. The long-life sealing device for the rotary air preheater of the thermal power boiler as set forth in claim 2, wherein: the lower part of the sector plate (1) is provided with a high manganese steel wear-resistant layer (101), the lower part of the buffer guide plate (2) is provided with an arc streamline-shaped wear-resistant layer (201), and the arc streamline-shaped wear-resistant layer (201) is in smooth transition connection with the high manganese steel wear-resistant layer (101).
4. The long life seal for a rotary air preheater of a thermal power boiler as set forth in claim 1, wherein: and a dustproof hairbrush (4) can be arranged between the support sleeve (7) and the sealing strip (3) to further improve the sealing property.
5. The long life seal for a rotary air preheater of a thermal power boiler as set forth in claim 1, wherein: the effective working height L1 of the sealing strip (3) is not less than 200 mm.
6. The long life seal for a rotary air preheater of a thermal power boiler as set forth in claim 1, wherein: the height L2 of the position adjusting hole (501) is not less than L1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023046319.8U CN214120116U (en) | 2020-12-16 | 2020-12-16 | Long-life sealing device for rotary air preheater of thermal power boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023046319.8U CN214120116U (en) | 2020-12-16 | 2020-12-16 | Long-life sealing device for rotary air preheater of thermal power boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214120116U true CN214120116U (en) | 2021-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023046319.8U Active CN214120116U (en) | 2020-12-16 | 2020-12-16 | Long-life sealing device for rotary air preheater of thermal power boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214120116U (en) |
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2020
- 2020-12-16 CN CN202023046319.8U patent/CN214120116U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211215 Address after: 030045 103 Internet plus intelligence Industrial Park F block 156, South Inner Ring East Street, Yingze District, Taiyuan, Shanxi Patentee after: SHANXI CHANGDE DACHENG TECHNOLOGY Co.,Ltd. Address before: 030045 103 Internet plus intelligence Industrial Park F block 156, South Inner Ring East Street, Yingze District, Taiyuan, Shanxi Patentee before: Wu Tianshun |
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| TR01 | Transfer of patent right |