CN203454190U - Rolling-type elastic sealing device used for air pre-heater and sector board comprising same - Google Patents
Rolling-type elastic sealing device used for air pre-heater and sector board comprising same Download PDFInfo
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- CN203454190U CN203454190U CN201320325135.6U CN201320325135U CN203454190U CN 203454190 U CN203454190 U CN 203454190U CN 201320325135 U CN201320325135 U CN 201320325135U CN 203454190 U CN203454190 U CN 203454190U
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- air preheater
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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 discloses a rolling-type elastic sealing device used for an air pre-heater and a section board comprising the same. The device includes a fixed board and a movable board. One end of the movable board is connected with the fixed board in a rotary manner while the other end of the movable board is provided with a rolling mechanism. The rolling mechanism is not lower than the movable board. According to the utility model, a rolling method replacing a dry lubrication method employing a plurality of flexible sealing devices is adopted for contacting with the sector board or an arc-shaped board. No relative slide and shift exist between contact faces of rollers and a sealing face of the sector board and the arc-shaped board, so that a problem of cutting abrasion is eliminated. The rollers are supported by balls and roll around roller core shafts. A rolling refraction index is much smaller than a sliding refraction index and little influence shows on operation current of the air pre-heater. The rolling-type elastic sealing device used for the air pre-heater provided by the utility model can realize more than 60% transformation volume in a limited installation space and can be suitable for changes of dynamic clearance and static clearance in different working conditions, and is high in space utilization rate and high and good in sealing effect.
Description
Technical field
The fanning strip that the utility model relates to a kind of air preheater roller elastic sealing device and comprises it, belongs to air preheater flexible sealing field.
Background technology
Rotary regenerative air preheater is a kind of heat-exchange apparatus for large-sized station boiler, and it utilizes the heat of boiler smoke to carry out the required air of heating flame, with this, improves the efficiency of boiler.
Air preheater rotor by cold conditions to hot, due to upper and lower both ends of the surface temperature difference and steel be heated after the weakening of rigidity, produce " mushroom " distortion, as adopt conventional rigid diaphragm seal, gap, part position (as axial and cold junction radial outside) can diminish, and gap, another part position (as hot junction radial outside) can become large.
From above-mentioned characteristic, for reaching, control the object leak out, comparatively desirable encapsulation scheme can be sketched and be: 1. axially and the reserved suitable cold conditions gap of cold junction radial position, rotor is heated after sound fit clearance go to zero; 2. the triangle that hot junction radial position forms after the being heated region of leaking out, need manage to make up.
For the above-mentioned 1. point, can realize in theory, but in practical engineering application, cold conditions preset clearance is subject to load variations, coal type change, steel performance difference, rotor perpendicularity deviation, fanning strip flatness and the impact of the factors such as diaphragm seal peace tuningout is poor, is difficult to accurately set.Consider security, cold conditions preset clearance operated by rotary motion is bigger than normal, therefore still there is in axial and cold junction radial position the situation of leaking out.
For the above-mentioned the 2. point, in engineering, there is two schemes: the one, the fanning strip automatic tracking system (being called for short LCS) that domestic San great main frame producer (east pot, breathe out pot and upper pot) is equipped with; The 2nd, the flexible sealing technology growing up in recent years.Be understood that, in fact this embodied two aspects of a problem: air pre-heater sealing problem is the matching problem of diaphragm seal and fanning strip, and diaphragm seal automatic paste tightening fanning strip and fanning strip all can be realized and reduce the object of leaking out from motion tracking diaphragm seal.But this two schemes all has problems again in engineering application: be subject to the impact of bad working environments (high temperature, dust etc.), repair quality, management of water equality many factors, the most LCS of power plant systems all can not bringing normally into operation or the effect that puts into operation undesirable.World-leading rotary regenerative air preheater supplier HOWDEN is supporting LCS on air preheater not always, also illustrates from the side that this technology also needs further perfect.And traditional flexible sealing technology exposes the especially problem such as rapid wear, structure are unreliable, backlash compensation quantity not sufficient, at all cannot engineering demands.Can say, hot junction radially the leak out Air Leakage in region of triangle is not solved always, and along with unit is to large capacity future development, air preheater rotor diameter constantly increases, if do not take measures, radially the leak out share of leaking out in region of triangle is increasing in hot junction.As adopt conventional rigid diaphragm seal and hot junction fanning strip when non-adjustable, and 300MW unit hot junction is the super 10mm in outer most edge gap radially, the super 25mm of 600MW unit, and 1000MW unit gap is in 50mm left and right.Leak out and account for the more than 50% of total inleakage in the air preheater hot junction that 600MW and above unit are equipped with radially triangle, definitely inleakage also surpasses 3%, also will cause a wind to lose herein and surpass 30%.
Utility model content
The fanning strip that the purpose of this utility model is to provide a kind of air preheater roller elastic sealing device and comprises it.
For solving the problems of the technologies described above, the technical solution of the utility model is:
An air preheater roller elastic sealing device, comprises fixed head and portable plate, and one end and the fixed head of described portable plate are rotationally connected, and the other end is provided with rolling mechanism, and described rolling mechanism is not less than portable plate.
It is in order to facilitate the rolling of rolling mechanism that above-mentioned rolling mechanism is not less than portable plate, and preferably, rolling mechanism is a little more than portable plate.
In order to improve sealing effectiveness and flexibility, increase the service life simultaneously, described rolling mechanism comprises gear type roller.
For saving material, prepare easyly, guarantee the performance of sealing device simultaneously, described rolling mechanism comprises: roller mandrel, gear type roller and connector, gear type roller is rotatably connected on roller mandrel, roller mandrel is connected on portable plate by connector.
For easy to prepare, be convenient to safeguard, described rolling mechanism also comprises lock tune nut, the shaft section of described roller mandrel is " T " word shape, described connector is ring-type and is connected on portable plate, described gear type roller, connector and lock adjust nut to be connected to the periphery of roller mandrel in turn, between gear type roller and roller mandrel, for being rotationally connected, lock is adjusted between nut and roller mandrel as being threaded.
Above-mentioned connector can be one-body molded with portable plate, also can be by means such as welding and be connected on portable plate.
In order to reduce the friction between roller and roller mandrel, improve adaptability, operating efficiency and the stability of sealing device simultaneously, between described gear type roller and roller mandrel, be provided with ball.
Said gear formula roller can be both local gear, also can all gear.
For the stability that guarantees to roll, save material simultaneously, between described gear type roller and roller mandrel, be provided with two row balls, described ball is Self-lubricating ball, is preferably the ceramic balls of self-lubricating property, as silicon nitride ceramics ball.
Each gear type roller is subject to the support of biserial ball, is to contact between ball and gear type roller and roller mandrel, and the inner fit clearance of rolling mechanism is reasonable in design, has effectively prevented the harmful effect of dust pollution to stability in roll and flexibility.
In order to guarantee sealing device reliably working, described rolling mechanism has two at least.
Rolling mechanism is preferably two, and is located at half-terete two ends.
In order to guarantee the reset effect of sealing device, one end and the fixed head of described portable plate are rotationally connected by spring hinge.
For easy to prepare, the reset effect of while assurance device, described spring hinge comprises two resetting means that are oppositely arranged, the structure of each resetting means is: comprise hinge rotating shaft, screwed pipe, torsion spring and tube connector, screwed pipe, torsion spring and tube connector are socketed in the periphery of hinge rotating shaft successively, described tube connector is connected on portable plate, and described screwed pipe is connected on fixed head.
The torsion spring of two resetting means that are oppositely arranged, preferably, one is clockwise torsion spring, another is counterclockwise torsion spring.
In order to obtain complete hermetically-sealed construction, described two resetting means are connected as a single entity by mending gap sleeve pipe, the hinge rotating shaft of two resetting means all stretch out tube connector, the part that tube connector is stretched out in two hinge rotating shafts socket-connects with the two ends of mending gap sleeve pipe respectively; Described torsion spring is arranged with torsion spring set pipe outward.
In order to control easily between fixed head and portable plate angle in relative rotation, resist the risk that uncertain indivedual torsion spring lost efficacy simultaneously, described spring hinge also comprises spacing shim, and described spacing shim is locked between the head and screwed pipe end of hinge rotating shaft.
In order to guarantee the limit effect of spacing shim, described spacing shim is to be provided with the spacing different in nature pad that stretches out angle.
Spacing shim direction setting, to be limited to foundation in the portable plate anglec of rotation, even if guarantee that torsion spring is entirely ineffective, also can keep the sealing effectiveness of conventional seals sheet.
In order to improve stability, the sealing of sealing device; simultaneously can meet various production required, on described fixed head, the outer of spring hinge be arranged with for protecting the baffle of spring hinge, baffle comprises vertical the first backplate and the second backplate being connected; wherein, the second backplate is connected with fixed head.
The structure that above-mentioned baffle and fixed head can be formed in one, also can be by modes such as welding and is connected as a single entity.
The height of above-mentioned the first backplate, can decide according to the anglec of rotation of the relative fixed head of portable plate, and when the required anglec of rotation is 90 °, the first protective plate height equates with the external diameter of spring hinge; When the required anglec of rotation is less than 90 °, the first protective plate height is greater than the external diameter of spring hinge; When the required anglec of rotation is greater than 90 °, the first protective plate height is less than the external diameter of spring hinge.
In order to improve the stability of sealing device and sealing property etc., described portable plate and the one end being connected with fixed head are flat segments, one end that portable plate is provided with rolling mechanism is semi-cylindrical, and half-terete diameter is not more than the external diameter of the gear type roller of rolling mechanism.
The local outer surface of above-mentioned half-terete outer surface and gear type roller forms complete circular arc sealing surface.
Going down of the sealing effectiveness causing because of irresistible distortion for anti-locking apparatus facilitates device to install simultaneously, and described fixed head is bending structure; Described fixed head is provided with installation waist-shaped hole.
The design that waist-shaped hole is installed is for the ease of air preheater roller elastic sealing device is arranged on rotor dividing plate.
The application of above-mentioned air preheater roller elastic sealing device, the end of hinge rotating shaft is provided with cavity, by the mistake proofing pin being located in adjacent two hinge rotating shaft cavitys, adjacent two air preheater roller elastic packings is connected as a single entity.
Preferably, described cavity is interior hexagonal cavity, and mistake proofing pin is straight pin, and the external diameter of straight pin is less than the diameter of interior hexagonal cavity inscribed circle.
In order to give full play to the performance of above-mentioned air preheater roller elastic device, preferably air preheater roller elastic packing is arranged on to hot junction radially on dividing plate.
The fanning strip of the preheater that comprises above-mentioned air preheater roller elastic sealing device, is provided with roller guide block in entry position and/or the exit position of fanning strip, and roller guide block comprises arc surface.
Preferably, arc surface is provided with and the intermeshing tooth bar of gear type roller.The modulus of the section of rack of roller guide block equates with the modulus of the gear parts of gear type roller.
Roller guide block preferred weld is in the entrance and exit edge of hot junction fanning strip, corresponding with the position of roller.This matching design can guarantee that gear type roller is subject to the effect of rack and pinion engagement before contacting with fanning strip and forces rolling, reduces the possibility of roller bite.Thereby effectively prevented because of the impact of dust pollution on sealing effectiveness.
The fanning strip regulating system of the preheater that comprises above-mentioned air preheater roller elastic sealing device: comprise program-control cabinet, executing agency and adjusting rod that order is joined, described adjusting rod is connected with hot junction fanning strip.
Above-mentioned each parts material therefor should be selected has high temperature resistant, corrosion-resistant, anti abrasive material simultaneously.
Applicant finds after deliberation, along with air preheater rotor produces " mushroom " distortion, the axis of duty lower rotary shaft mechanism hardly may be parallel with fanning strip sealing surface, so a certain moment only has the roller of portable plate one end to contact with fanning strip sealing surface, between portable plate and fanning strip sealing surface, there is all the time minim gap, both are discontiguous in fact, have avoided mutual wearing and tearing.Above-mentioned minim gap is 0-3mm, adopts the gap of the formed 0-50mm of conventional rigid Sealing Technology much smaller.
The technology that the utility model is not particularly limited is prior art.
The utility model air preheater roller elastic sealing device replaces the mode of numerous flexible seal device dry friction to contact with fanning strip or arc in the mode of rolling, between roller contact face and fanning strip or arc sealing surface, there is not relative slippage, therefore there is not the problem of cutting abrasion, coefficient of rolling friction is far smaller than the coefficient of sliding friction, very micro-on the impact of air preheater running current; In limited installing space, the utility model air preheater roller elastic sealing device can obtain significantly compensation performance, can adapt to the variation of dynamic and static gaps under various different operating modes completely, and space availability ratio is high, good sealing effect.
Accompanying drawing explanation
Fig. 1 is the front view of air preheater roller elastic sealing device in the utility model embodiment 1.
Fig. 2 is that the A-A of Fig. 1 is to revolved sectional view.
Fig. 3 is the B-B cutaway view of Fig. 2.
Fig. 4 is the C-C cutaway view of Fig. 2.
Fig. 5 is the D-D cutaway view of Fig. 2.
Fig. 6 is the E-E cutaway view of Fig. 2.
Fig. 7 is the F-F cutaway view of Fig. 2.
Fig. 8 is the G-G cutaway view of Fig. 2.
Fig. 9 is the splicing schematic diagram of adjacent two air preheater roller elastic sealing devices.
Figure 10 is air preheater roller elastic sealing device working state schematic representation.
Figure 11 is the enlarged diagram while just having entered duty in Fig. 5.
Figure 12 is that air preheater cold and hot gap changes contrast schematic diagram, each gap, position when left side represents cold conditions, and right side represents each gap, position situation (adopt conventional rigid Sealing Technology and be not equipped with LCS system) when hot.
Figure 13 is the schematic diagram of the utility model fanning strip regulating system.
In figure, 1 is fixed head, 2 is portable plate, 3 for mending gap sleeve pipe, 4 is tube connector, 5 is torsion spring sleeve pipe, 6 is screwed pipe, 7 is spacing shim, 8 is hinge rotating shaft, 9 is roller mandrel, 10 is gear type roller, 11 is clockwise torsion spring, 12 is counterclockwise torsion spring, 13 is ball, 14 is lock tune nut, 15 is connector, 16 is mistake proofing pin, 17 is half-terete end, 18 is roller guide block, 19 is hot junction fanning strip, 20 is the first backplate, 21 is the second backplate, 22 is axial arc, 23 is cold junction fanning strip, 24 is air preheater rotor, 25 is radially dividing plate of hot junction, 26 is adjusting rod, 27Wei executing agency, 28 is program-control cabinet, 29 for controlling data, 30 is cold conditions, 31 is hot, 32 is the triangle region of leaking out radially, hot junction.
The specific embodiment
In order to understand better the utility model, below in conjunction with embodiment, further illustrate content of the present utility model, but content of the present utility model is not only confined to the following examples.
Embodiment 1
Air preheater roller elastic sealing device as shown in the figure, comprises fixed head and portable plate, and one end and the fixed head of described portable plate are rotationally connected, and the other end is provided with rolling mechanism, and described rolling mechanism is not less than portable plate.
Above-mentioned rolling mechanism comprises roller mandrel, gear type roller, connector and lock tune nut, the shaft section of described roller mandrel is " T " word shape, described connector is ring-type and is connected on portable plate, described gear type roller, connector and lock adjust nut to be connected to the periphery of roller mandrel in turn, between gear type roller and roller mandrel, for being rotationally connected, lock is adjusted between nut and roller mandrel as being threaded; Between gear type roller and roller mandrel, be provided with two row balls, described ball is Self-lubricating ball.
One end and the fixed head of portable plate are rotationally connected by spring hinge; Above-mentioned spring hinge comprises two resetting means that are oppositely arranged, the structure of each resetting means is: comprise hinge rotating shaft, screwed pipe, torsion spring and tube connector, screwed pipe, torsion spring and tube connector are socketed in the periphery of hinge rotating shaft successively, described tube connector is connected on portable plate, and described screwed pipe is connected on fixed head; Above-mentioned two resetting means are connected as a single entity by mending gap sleeve pipe, the hinge rotating shaft of two resetting means all stretch out tube connector, the part that tube connector is stretched out in two hinge rotating shafts socket-connects with the two ends of mending gap sleeve pipe respectively, two torsion springs in two resetting means, one is clockwise torsion spring, and another is counterclockwise torsion spring; Described torsion spring is arranged with torsion spring set pipe outward; Spring hinge also comprises spacing shim, and described spacing shim is locked between the head and screwed pipe end of hinge rotating shaft, and spacing shim is to be provided with the spacing different in nature pad that stretches out angle; On fixed head, the outer of spring hinge be arranged with for protecting the baffle of spring hinge, baffle comprises vertical the first backplate and the second backplate being connected, wherein, the second backplate is connected with fixed head.
Portable plate and the one end being connected with fixed head are flat segments, and the one end that is provided with rolling mechanism is semi-cylindrical, and half-terete diameter is not more than the external diameter of the gear type roller of rolling mechanism.Above-mentioned rolling mechanism has two, is located at respectively half-terete two ends; Fixed head is one bending structure; Described fixed head is provided with installation waist-shaped hole.
The application of air preheater roller elastic sealing device, the end of the hinge rotating shaft of air preheater roller elastic packing is provided with cavity, by the mistake proofing pin being located in adjacent two hinge rotating shaft cavitys, adjacent two air preheater roller elastic packings is connected as a single entity; Cavity is interior hexagonal cavity, and mistake proofing pin is straight pin, and the external diameter of straight pin is less than the diameter of interior hexagonal cavity inscribed circle.
Air preheater roller elastic packing is arranged on to hot junction radially on dividing plate.
The fanning strip of the preheater that comprises above-mentioned air preheater roller elastic sealing device, is provided with roller guide block in entry position and/or the exit position of fanning strip, and roller guide block comprises arc surface, and arc surface is provided with and the intermeshing tooth bar of gear type roller.
The fanning strip regulating system of the preheater that comprises air preheater roller elastic sealing device: comprise program-control cabinet, executing agency and adjusting rod that order is joined, described adjusting rod is connected with hot junction fanning strip.This device can be according to the distance of the automatic adjusting of the data such as air preheater inlet flue gas temperature, unit load, running current and each sealing device.As a kind of accessory system, according to air preheat implement body model, determine whether come into operation.
During installation, gap width or the magnitude of interference that air preheater roller elastic sealing device sets, the air preheater cold and hot gap variable quantity of take is Main Basis.
The 31VNT1950 type air preheater that HOWDEN company produces of take is example, quantize compensation characteristic and the contribution to air leak rate of air curtain reduction that explanation air preheater roller elastic sealing device has: the said equipment standard configuration conventional rigid diaphragm seal, hot junction fanning strip is fixing non-adjustable, general initial operation stage air leak rate of air curtain can reach design load 6%, wherein by the hot junction triangle super 3%(absolute value of impact that region causes that leaks out radially), air side is to the about 0.15m of the area that leaks out of fume side
2(being equivalent to an internal diameter is that 437mm pipeline section is long-pending), the super 12mm in gap on average leaks out.With air preheater roller elastic sealing device, replace conventional rigid diaphragm seal, the gap that can make on average to leak out is less than 2mm, and air leak rate of air preheater remains on 3%-4% for a long time, reaches world lead level.
Claims (17)
1. an air preheater roller elastic sealing device, is characterized in that: comprise fixed head and portable plate, one end and the fixed head of described portable plate are rotationally connected, and the other end is provided with rolling mechanism, and described rolling mechanism is not less than portable plate.
2. air preheater roller elastic sealing device as claimed in claim 1, is characterized in that: described rolling mechanism comprises gear type roller.
3. air preheater roller elastic sealing device as claimed in claim 2, it is characterized in that: described rolling mechanism comprises: roller mandrel, gear type roller and connector, gear type roller is rotatably connected on roller mandrel, and roller mandrel is connected on portable plate by connector.
4. air preheater roller elastic sealing device as claimed in claim 3, it is characterized in that: described rolling mechanism also comprises lock tune nut, the shaft section of described roller mandrel is " T " word shape, described connector is ring-type and is connected on portable plate, described gear type roller, connector and lock adjust nut to be connected to the periphery of roller mandrel in turn, between gear type roller and roller mandrel, for being rotationally connected, lock is adjusted between nut and roller mandrel as being threaded.
5. air preheater roller elastic sealing device as claimed in claim 4, is characterized in that: between described gear type roller and roller mandrel, be provided with ball.
6. air preheater roller elastic sealing device as claimed in claim 5, is characterized in that: between described gear type roller and roller mandrel, be provided with two row balls, described ball is Self-lubricating ball.
7. the air preheater roller elastic sealing device as described in claim 1-6 any one, is characterized in that: described rolling mechanism has two at least.
8. the air preheater roller elastic sealing device as described in claim 1-6 any one, is characterized in that: one end and the fixed head of described portable plate are rotationally connected by spring hinge.
9. air preheater roller elastic sealing device as claimed in claim 8, it is characterized in that: described spring hinge comprises two resetting means that are oppositely arranged, the structure of each resetting means is: comprise hinge rotating shaft, screwed pipe, torsion spring and tube connector, screwed pipe, torsion spring and tube connector are socketed in the periphery of hinge rotating shaft successively, described tube connector is connected on portable plate, and described screwed pipe is connected on fixed head.
10. air preheater roller elastic sealing device as claimed in claim 9, it is characterized in that: described two resetting means are connected as a single entity by mending gap sleeve pipe, the hinge rotating shaft of two resetting means all stretch out tube connector, the part that tube connector is stretched out in two hinge rotating shafts socket-connects with the two ends of mending gap sleeve pipe respectively; Described torsion spring is arranged with torsion spring set pipe outward.
11. air preheater roller elastic sealing devices as claimed in claim 10, is characterized in that: described spring hinge also comprises spacing shim, described spacing shim is locked between the head and screwed pipe end of hinge rotating shaft.
12. air preheater roller elastic sealing devices as claimed in claim 11, is characterized in that: described spacing shim is to be provided with the spacing different in nature pad that stretches out angle.
13. air preheater roller elastic sealing devices as claimed in claim 12; it is characterized in that: on described fixed head, the outer of spring hinge be arranged with for protecting the baffle of spring hinge; baffle comprises vertical the first backplate and the second backplate being connected; wherein, the second backplate is connected with fixed head.
14. air preheater roller elastic sealing devices as described in claim 2-6 any one, it is characterized in that: described portable plate and the one end being connected with fixed head are flat segments, the one end that is provided with rolling mechanism is semi-cylindrical, and half-terete diameter is not more than the external diameter of the gear type roller of rolling mechanism.
15. air preheater roller elastic sealing devices as described in claim 1-6 any one, is characterized in that: described fixed head is bending structure; Described fixed head is provided with installation waist-shaped hole.
The fanning strip of 16. 1 kinds of preheaters that comprise the air preheater roller elastic sealing device described in claim 1-15 any one, is characterized in that: entry position and/or exit position at fanning strip are provided with roller guide block, and roller guide block comprises arc surface.
17. fanning strips that comprise the air preheater roller elastic sealing device described in claim 1-15 any one as claimed in claim 16, is characterized in that: arc surface is provided with and the intermeshing tooth bar of gear type roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320325135.6U CN203454190U (en) | 2013-06-06 | 2013-06-06 | Rolling-type elastic sealing device used for air pre-heater and sector board comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320325135.6U CN203454190U (en) | 2013-06-06 | 2013-06-06 | Rolling-type elastic sealing device used for air pre-heater and sector board comprising same |
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| Publication Number | Publication Date |
|---|---|
| CN203454190U true CN203454190U (en) | 2014-02-26 |
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ID=50134062
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320325135.6U Withdrawn - After Issue CN203454190U (en) | 2013-06-06 | 2013-06-06 | Rolling-type elastic sealing device used for air pre-heater and sector board comprising same |
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| Country | Link |
|---|---|
| CN (1) | CN203454190U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103322584A (en) * | 2013-06-06 | 2013-09-25 | 杨建明 | Rolling elastic sealing device for air preheater and application thereof |
| CN109116447A (en) * | 2018-11-14 | 2019-01-01 | 李成代 | A kind of rainfall tester suitable for remote mountain areas |
| CN109116446A (en) * | 2018-11-14 | 2019-01-01 | 李成代 | A kind of mountain area rainfall test method |
-
2013
- 2013-06-06 CN CN201320325135.6U patent/CN203454190U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103322584A (en) * | 2013-06-06 | 2013-09-25 | 杨建明 | Rolling elastic sealing device for air preheater and application thereof |
| CN103322584B (en) * | 2013-06-06 | 2015-06-24 | 南京博沃科技发展有限公司 | Rolling elastic sealing device for air preheater and application thereof |
| CN109116447A (en) * | 2018-11-14 | 2019-01-01 | 李成代 | A kind of rainfall tester suitable for remote mountain areas |
| CN109116446A (en) * | 2018-11-14 | 2019-01-01 | 李成代 | A kind of mountain area rainfall test method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140226 Effective date of abandoning: 20150624 |
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| RGAV | Abandon patent right to avoid regrant |