CN203131031U - Sealing device for hot air channel baffle shaft - Google Patents
Sealing device for hot air channel baffle shaft Download PDFInfo
- Publication number
- CN203131031U CN203131031U CN 201320055826 CN201320055826U CN203131031U CN 203131031 U CN203131031 U CN 203131031U CN 201320055826 CN201320055826 CN 201320055826 CN 201320055826 U CN201320055826 U CN 201320055826U CN 203131031 U CN203131031 U CN 203131031U
- Authority
- CN
- China
- Prior art keywords
- hot
- damper shaft
- flow flue
- baffle shaft
- seal ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to a sealing device for a hot air channel baffle shaft. The sealing device for the hot air channel baffle shaft comprises packing filled along the baffle shaft and a pressing flange which presses the packing from an atmosphere side to a hot air channel side. A containing cavity is formed in the inner portion of the pressing flange, a through hole is further formed in the pressing flange, the containing cavity is connected with an external air supplying pipe through the through hole, and the air pressure in the external air supplying pipe is larger than the air pressure in a hot air channel. A first sealing ring is arranged to be close to the hot air channel in the containing cavity and on the baffle shaft in a sleeved mode, the diameter of the inner ring of the first sealing ring is smaller than or equal to the diameter of the baffle shaft, a second sealing ring is arranged to be close to the atmosphere side in the containing cavity and on the baffle shaft in a sleeved mode, and the diameter of the inner ring of the second sealing ring is smaller than or equal to the diameter of the baffle shaft. The sealing device for the hot air channel baffle shaft has the advantages that due to the fact that a piece of sealing air is arranged in each sealing ring, wind and dust are effectively prevented form being leaked from the hot air channel, and reliable operation of equipment is ensured. Due to the fact that all the sealing rings can move with the baffle shaft, the gaps between each sealing ring and the baffle shaft will not change, and therefore the sealing effect is effective in a long term.
Description
Technical field
The utility model relates to a kind of seal arrangement, particularly a kind of hot-flow flue damper shaft seal arrangement.
Background technique
At present the door-hinge sealing major part of all kinds of baffle doors all is the differential formula on coal-burning power plant's hot-flow flue, and inside is filled with packing, and stuffing box packing just is used for stopping that the hot blast in the hot-flow flue outwards reveals.The baffle plate that is positioned at hot-flow flue 104 as shown in Figure 1 and the damper shaft 101 of stretching out atmospheric side from hot-flow flue, be filled with packing 102 on the damper shaft 101, fix in order to make packing, generally a spill base 105 can be set in the outlet port from hot-flow flue of damper shaft 101, packing 102 is filled in this spill base 105, differential 103 compresses packing 102 from atmospheric side (being the left side Fig. 1), realizes sealing purpose by packing.Because hot blast wind-warm syndrome and blast in the hot-flow flue are higher, when baffle door adjustment door-hinge moved, hot blast will outwards be revealed along door-hinge, causes energy loss, and often also had dust in the hot blast, also can bring pollution to environment.When unit normally moves, because baffle door will ceaselessly be adjusted with load, the defective that so this hot blast is revealed will large size take place, generally speaking, the packing of new clothes is less than the defective that will leak out in three months, and unit can not stop in 1 year sometimes, even stop once in a while once, this defective also can not in two or three days eliminated, so people wish to provide a kind of effective technical means to solve hot-flow flue damper shaft sealing problem.
The model utility content
Technical problem to be solved in the utility model provides a kind of hot-flow flue damper shaft seal arrangement reliably and with long-term, that can effectively prevent the suitable door-hinge leakage of hot blast.
The technological scheme that the utility model solves the problems of the technologies described above is as follows: a kind of hot-flow flue damper shaft seal arrangement, comprise the packing of filling along damper shaft and the differential to the described packing of hot-flow flue side compression from atmospheric side, described differential inside has one and holds cavity, also offer a through hole on the described differential, the described cavity that holds is connected with outside air feed pipe by described through hole, and the blast in the described outside air feed pipe is greater than the blast in the described hot-flow flue; Be arranged with first seal ring on the described damper shaft of holding the close hot-flow flue side in the cavity, the inner ring diameter of described first seal ring is smaller or equal to the diameter of described damper shaft, be arranged with second seal ring on the damper shaft of the close atmospheric side in the described holding space, the inner ring diameter of described second seal ring is smaller or equal to the diameter of described damper shaft.
The beneficial effects of the utility model are: at first, owing to be furnished with sealing wind in the seal ring one, therefore contain the hot blast of ash in the hot-flow flue because its blast is lower than the blast of the sealing wind of feeding, therefore effectively prevented the ash that leaks out of hot-flow flue, the equipment that guaranteed moves reliably and with long-term; Secondly, because each seal ring can be movable with damper shaft, the gap of seal ring and damper shaft can not change, and is not easy to wear with the contact position of axle, and therefore this sealing effect can be permanently effective; At last, the utility model is simple for structure, is easy to realize.
On the basis of technique scheme, the utility model can also be done following improvement.
Further, described first seal ring and the described inwall that holds cavity are gapped, and described second seal ring and the described inwall that holds cavity are gapped.The beneficial effect that adopts above-mentioned further scheme is that the inwall that holds cavity can not apply unnecessary external force to damper shaft, avoids it to hinder the adjustment of baffle plate.
Further, also be arranged with the 3rd seal ring on the damper shaft of the close atmospheric side in the described holding space.The beneficial effect that adopts above-mentioned further scheme is the model utility that adopts this structure, because atmospheric side air pressure is minimum, therefore is necessary further to strengthen the sealing of atmospheric side.
Further, described differential is fixed on the outer tube wall of described hot-flow flue, and the junction surface of the outer tube wall of described differential and described hot-flow flue is provided with Stamping Steel Ribbon.The beneficial effect that adopts above-mentioned further scheme is owing to fed pressurized gas, further improves sealing effect.
Description of drawings
Fig. 1 is the hot-flow flue damper shaft seal arrangement schematic representation of prior art;
Fig. 2 is hot-flow flue damper shaft seal arrangement schematic representation of the present utility model.
In order to make the sequence number in the accompanying drawing more obviously give expression to inventive point of the present invention, below each title the situation of repetition may be arranged, be disambiguation, here explanation: label 101-104 refers to parts of the prior art, and 201-213 refers to each parts of the present invention.The list of parts of each label representative is as follows:
101, damper shaft, 102, packing, 103, differential, 104, baffle plate, 105, base;
201, damper shaft, 202, packing, 203, differential, 204, baffle plate, 205, base, 206, hold cavity, 207, through hole, 208, first seal ring, 209, second seal ring, the 210, the 3rd seal ring, 211, Stamping Steel Ribbon.
Embodiment
Below in conjunction with accompanying drawing principle of the present utility model and feature are described, institute gives an actual example and only is used for explaining the utility model, is not for limiting scope of the present utility model.
The utility model as shown in Figure 2, baffle plate 204 is positioned at hot-flow flue, stretch out damper shaft 201 from hot-flow flue to atmospheric side, can stretch out from hot-flow flue in damper shaft 201 a spill base 205 is set, then packing 202 is inserted in the spill base 205, adopted differential 103 to compare with prior art among Fig. 1, the differential 203 that the utility model adopts is structurally different, difference is that its inside has one to hold cavity 206, can strengthen its inner volume when producing differential 203 obtains, for the ease of the dismounting maintenance, differential 203 is preferably according to two halves formula or split type production.
Also have a through hole 207 on differential 203, through hole 207 is used for connecting described cavity 206 and the outside air intake pipe of holding, and the blast in the outside air intake pipe is greater than the blast in the hot-flow flue.That is to say, be blown into blast in the cavity 206 greater than the wind of blast in the hot-flow flue by through hole 207 to holding, because it is big to feed the blast of wind, therefore the hot blast in the hot-flow flue can not revealed to the holding space direction, that is to say that feeding wind has played seal action, be " sealing wind ", its effect is that the more effective hot blast of hot-flow flue that prevented is outwards revealed.For example the blast of hot-flow flue is 12kpa, " the sealing wind " that is blown into so can select 19kpa, this transportation work style that is blown into is to play seal action, and this transportation work style can be drawn in on-the-spot coal pulverizer commonly used sealing wind adapter road from the coal-burning power plant, also is easy to obtain for the scene.
Be positioned at and be arranged with first seal ring 208, second seal ring 209, the 3rd seal ring 210 on the damper shaft 201 of holding cavity 206, the inner ring diameter of each seal ring is smaller or equal to the shaft diameter of damper shaft 201, that is to say, the inner ring of each seal ring and described damper shaft 201 form interference fit or transition fit, and being enclosed within on the damper shaft 201 and with damper shaft 201 that seal ring just can be firm like this moved.The quantity of seal ring can also increase and decrease according to actual conditions, have at least one second seal ring 209 but will guarantee at least to hold on the damper shaft 201 of close atmospheric side of cavity 206 inside, and hold on the damper shaft 201 of close hot-flow flue side of cavity 205 inside and also have at least one first seal ring 208.Can be preferably three seals ring shown in Figure 2, wherein set up the 3rd seal ring 210 near atmospheric side, the reason of doing like this is that the sealing wind pressure that feeds is the highest, next is the blast of hot-flow flue, atmospheric pressure is minimum, therefore easier of the leakage of atmosphere direction, therefore added seal ring one at atmospheric side.Make the sealing wind of feeding be difficult for revealing, just guaranteed that also the hot blast of hot-flow flue is difficult for revealing.
When guaranteeing sealing effect, above-mentioned each seal ring preferably has certain interval with the inwall that holds cavity 206, to guarantee that the inwall that holds cavity 206 can not apply unnecessary external force to damper shaft 201, avoid it to hinder the adjustment of baffle plate, for example 0.3mm can be selected in the gap.
During use, because each seal ring can move with damper shaft 201, the gap can not change, and is not easy to wear with the contact position of axle, and therefore this sealing effect can be permanently effective; And be furnished with sealing wind in the seal ring one, so contain the hot blast of ash in the hot-flow flue because blast is lower than the sealing wind of feeding, the ash that therefore effectively prevented from leaking out, the equipment that can guarantee moves reliably and with long-term.Above-mentioned seal ring also can adopt two halves formula or split type and use the mode of spring banding, to be convenient to maintenance and to install.
Owing to be blown into gas from through hole 207, bigger blast has been born in differential 203 inside, therefore need carry out tighter sealing to each interface, the ring-shaped edge of differential 203 shown in Figure 2 by be bolted to the hot-flow flue outer tube wall on base on, can also further arrange or fill in and add Stamping Steel Ribbon 211, feasible sealing is tightr, and the gas that is blown into is difficult for revealing.
The above only is preferred embodiment of the present utility model, and is in order to limit the utility model, not all within spirit of the present utility model and principle, any modification of doing, is equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (4)
1. hot-flow flue damper shaft seal arrangement, comprise the packing of filling along damper shaft and the differential to the described packing of hot-flow flue side compression from atmospheric side, it is characterized in that: described differential inside has one and holds cavity, also offer a through hole on the described differential, the described cavity that holds is connected with outside air feed pipe by described through hole, and the blast in the described outside air feed pipe is greater than the blast in the described hot-flow flue; Be arranged with first seal ring on the described damper shaft of holding the close hot-flow flue side in the cavity, the inner ring diameter of described first seal ring is smaller or equal to the diameter of described damper shaft, be arranged with second seal ring on the damper shaft of the close atmospheric side in the described holding space, the inner ring diameter of described second seal ring is smaller or equal to the diameter of described damper shaft.
2. according to the described a kind of hot-flow flue damper shaft seal arrangement of claim 1, it is characterized in that: described first seal ring and the described inwall that holds cavity are gapped, and described second seal ring and the described inwall that holds cavity are gapped.
3. according to the described a kind of hot-flow flue damper shaft seal arrangement of claim 1, it is characterized in that: also be arranged with the 3rd seal ring on the damper shaft of the close atmospheric side in the described holding space.
4. according to the arbitrary described a kind of hot-flow flue damper shaft seal arrangement of claim 1 to 3, it is characterized in that: described differential is fixed on the outer tube wall of described hot-flow flue, and the junction surface of the outer tube wall of described differential and described hot-flow flue is provided with Stamping Steel Ribbon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320055826 CN203131031U (en) | 2013-02-01 | 2013-02-01 | Sealing device for hot air channel baffle shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320055826 CN203131031U (en) | 2013-02-01 | 2013-02-01 | Sealing device for hot air channel baffle shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203131031U true CN203131031U (en) | 2013-08-14 |
Family
ID=48939011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320055826 Expired - Lifetime CN203131031U (en) | 2013-02-01 | 2013-02-01 | Sealing device for hot air channel baffle shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203131031U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105042081A (en) * | 2015-08-31 | 2015-11-11 | 神华集团有限责任公司 | Sealing device and installation structure for shaft penetrating air flue |
| CN106969147A (en) * | 2017-03-31 | 2017-07-21 | 唐山中浩化工有限公司 | A kind of source of the gas gland-type sealing device |
-
2013
- 2013-02-01 CN CN 201320055826 patent/CN203131031U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105042081A (en) * | 2015-08-31 | 2015-11-11 | 神华集团有限责任公司 | Sealing device and installation structure for shaft penetrating air flue |
| CN106969147A (en) * | 2017-03-31 | 2017-07-21 | 唐山中浩化工有限公司 | A kind of source of the gas gland-type sealing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130814 |
|
| CX01 | Expiry of patent term |