CN203163586U - Sealing device for central tube of air preheater - Google Patents
Sealing device for central tube of air preheater Download PDFInfo
- Publication number
- CN203163586U CN203163586U CN 201320067205 CN201320067205U CN203163586U CN 203163586 U CN203163586 U CN 203163586U CN 201320067205 CN201320067205 CN 201320067205 CN 201320067205 U CN201320067205 U CN 201320067205U CN 203163586 U CN203163586 U CN 203163586U
- Authority
- CN
- China
- Prior art keywords
- central tube
- sealing device
- air preheater
- sealing
- stuffing box
- 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 central tube of an air preheater. The sealing device comprises the central tube. A mounting plate is arranged on the outer circular surface of the central tube. An adjusting plate is arranged on the mounting plate. A gland box is mounted on the adjusting plate through a second bolt. The central tube is connected with the inner circular surface of the gland box through soft gland in a sealing manner. A tension ring is mounted on the top of the gland box through a first bolt. The sealing device is reasonable in structure, convenient to mount, low in cost and safe and reliable in use; and the central tube is connected in the sealing manner through the soft gland, sealing performance is not affected by thermal expansion of the central tube, the sealing device is reliable in sealing, long in service life and small in friction consumption.
Description
Technical field
The utility model relates to sealing device, especially a kind of air preheater central tube sealing device.
Background technology
Stuffing box sealing simple in structure made, installed, maintenance is all more convenient, therefore uses and cries to generally.At present, the thermal power plant, the sealing of air preheater central tube exists serious leakage problem.The leak free design of air preheater central tube is in the prior art: as shown in Figure 1, comprise central tube 1, described central tube 1 outer circumference surface is provided with installing plate 5, by screw 3 and spring 4 sealing plate 2 is installed on the described installing plate 5, described sealing plate 2 adopts aluminium sheet, seal by the gap between control sealing plate 2 inner peripheral surfaces and central tube 1 outer circumference surface, its principle is to set according to the expanded by heating amount of air preheater, but air preheater is in actual motion, owing to be subjected to variation of temperature indefinite, and can't accurately set its gap data, thereby cause its gap of air preheater central tube along with variation of temperature can change, and wear and tear between the sealing aluminium sheet, make it serious leakage, increased the air leak rate of air curtain of air preheater, shortened the service life of air preheater metal (upper greatly, raise the cost, on-the-spot working environment is subjected to severe contamination.
The utility model content
The applicant provides a kind of air preheater central tube sealing device rational in infrastructure, thereby makes its sealing property reliable at the insecure shortcoming of sealing of airtight and watertight padding case in the above-mentioned existing production technology, increases the service life, and reduces air leak rate of air curtain, reduces cost.
The technical scheme that the utility model adopts is as follows:
Air preheater central tube sealing device, comprise central tube, described central tube outer circumference surface is provided with installing plate, described installing plate is provided with adjustable plate, by second bolt stuffing box is installed on the described adjustable plate, the inner peripheral surface of described stuffing box is tightly connected by soft packing and central tube, and the tensioning circle is installed by first bolt in described stuffing box top.
As further improvement in the technical proposal:
Described tensioning circle is provided with step, its first step face and stuffing box top butt, its second step face and soft packing top butt;
The structure of described soft packing is circle, rectangle, wedge shape, triangle or tapered sleeve shape;
PTFE is adopted in described soft packing.
The beneficial effects of the utility model are as follows:
The utility model is rational in infrastructure, and is easy for installation, and cost is low, safe and reliable, is tightly connected by utilizing soft packing and central tube, can acceptor center tube expanded by heating and influence sealing property, and its sealing is reliable, long service life, friction consumes little.
Description of drawings
Fig. 1 is the structural representation of air preheater central tube sealing device in the prior art.
Fig. 2 is structural representation of the present utility model.
Wherein: 1, central tube; 2, sealing plate; 3, screw; 4, spring; 5, installing plate; 6, soft packing; 7, tensioning circle; 8, first bolt; 9, stuffing box; 10, second bolt; 11, adjustable plate.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described.
As shown in Figure 2, the air preheater central tube sealing device of present embodiment, comprise central tube 1, central tube 1 outer circumference surface is provided with installing plate 5, installing plate 5 is provided with adjustable plate 11, by second bolt 10 stuffing box 9 is installed on the adjustable plate 11, the inner peripheral surface of stuffing box 9 is tightly connected by soft packing 6 and central tube 1, tensioning circle 7 is installed by first bolt 8 in stuffing box 9 tops, tensioning circle 7 is provided with step, its first step face and stuffing box 9 top butts, its second step face and soft packing 6 top butts.
The structure of soft packing 6 is circle, rectangle, wedge shape, triangle or tapered sleeve shape.
PTFE is adopted in soft packing 6.It is wear-resisting, high temperature resistant, good sealing effect.
In the actual use, even central tube generation expanded by heating, because the setting of soft packing 6 can remain sealing property, sealing reliability is good, long service life.
Sealing device described in the utility model not only can be applicable to the air preheater central tube, also applicable to the application scenarios such as sealing of high pressure reciprocating pump or slow-speed of revolution pump, high temperature valve rod, valve or stuffing box.
More than describing is to explanation of the present utility model, is not the restriction to utility model, and the utility model institute restricted portion within protection domain of the present utility model, can be done any type of modification referring to claim.
Claims (4)
1. air preheater central tube sealing device, comprise central tube (1), described central tube (1) outer circumference surface is provided with installing plate (5), it is characterized in that: described installing plate (5) is provided with adjustable plate (11), described adjustable plate (11) is gone up by second bolt (10) stuffing box (9) is installed, the inner peripheral surface of described stuffing box (9) is tightly connected by soft packing (6) and central tube (1), and tensioning circle (7) is installed by first bolt (8) in described stuffing box (9) top.
2. air preheater central tube sealing device as claimed in claim 1, it is characterized in that: described tensioning circle (7) is provided with step, its first step face and stuffing box (9) top butt, its second step face and soft packing (6) top butt.
3. air preheater central tube sealing device as claimed in claim 1 is characterized in that: the structure of described soft packing (6) is circle, rectangle, wedge shape, triangle or tapered sleeve shape.
4. air preheater central tube sealing device as claimed in claim 1 is characterized in that: described soft packing (6) employing PTFE.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320067205 CN203163586U (en) | 2013-02-06 | 2013-02-06 | Sealing device for central tube of air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320067205 CN203163586U (en) | 2013-02-06 | 2013-02-06 | Sealing device for central tube of air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203163586U true CN203163586U (en) | 2013-08-28 |
Family
ID=49024764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320067205 Expired - Lifetime CN203163586U (en) | 2013-02-06 | 2013-02-06 | Sealing device for central tube of air preheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203163586U (en) |
-
2013
- 2013-02-06 CN CN 201320067205 patent/CN203163586U/en not_active Expired - Lifetime
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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: 20130828 |
|
| CX01 | Expiry of patent term |