CN203477324U - Sealing device for pull rod of medium-speed coal mill - Google Patents
Sealing device for pull rod of medium-speed coal mill Download PDFInfo
- Publication number
- CN203477324U CN203477324U CN201320612712.XU CN201320612712U CN203477324U CN 203477324 U CN203477324 U CN 203477324U CN 201320612712 U CN201320612712 U CN 201320612712U CN 203477324 U CN203477324 U CN 203477324U
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- CN
- China
- Prior art keywords
- sealing
- medium
- stuffing box
- box gland
- pull rod
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- Expired - Fee Related
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Abstract
The utility model relates to a mechanical sealing device, in particular to a sealing device for a pull rod of a medium-speed coal mill. The sealing device comprises a sealing sleeve, a sealing ring, an O-shaped ring, a sealing sleeve assembling bolt, a wear-resisting sealing flange on the bottom of the sealing sleeve, a sealing base wear-resisting sealing flange and a wear-resisting flange fixing bolt. A concave groove, a concave sealing air chamber and a sealing air vent hole are formed in the sealing sleeve. The sealing ring is embedded into the concave groove. Sealing air enters the concave sealing air chamber through the sealing air vent hole and then forms positive pressure in cooperation with the upper gap of the sealing sleeve through the pull rod for the interior of the coal mill to conduct seal. The sealing sleeve and a pull rod sealing base form a radial sealing structure through the wear-resisting sealing flange on the bottom of the sealing sleeve and the sealing base wear-resisting sealing flange. The sealing device for the pull rod of the medium-speed coal mill is good in sealing effect, good in radial sealing effect and free of clamping, and does not produce abrasion to the pull rod.
Description
Technical field
The utility model relates to a kind of mechanical seal device, particularly be a kind of medium-speed pulverizer pull bar upper sealing device.
Background technique
Medium-speed pulverizer is attached equipment important in thermal power plant, it is unit preparation of fuel equipment, medium-speed pulverizer pull bar is the important component part of deceleration loading device, the existing axial motion of equipment medium-speed pulverizer pull bar in service has again radial motion, seal more difficult, medium-speed pulverizer tie-rod sealing is divided into sealing and lower seal, due on to be sealed in medium-speed pulverizer internal operating environment severe, sealing is difficulty especially, and prior art scheme fails thoroughly to solve the leakage powder phenomenon of sealing place on pull bar always.
Existing medium-speed pulverizer pull bar upper sealing device as shown in Figure 1.
In Fig. 1, on pull bar, sealing adopts steel slipper seal ring structure, sliding ring divides two-part to be sleeved on pull bar, and by limiting stopper, sliding ring is limited on medium-speed pulverizer tie-rod sealing seat, during equipment operation, pull bar moves axially in the endoporus of sliding ring, sliding ring is with pull bar radial motion in limiting stopper simultaneously, its shortcoming is: (one) pull bar and sliding ring are steel, easily pull bar is produced to wearing and tearing; (2) between slipper seal piece and limiting stopper, easily long-pending assorted iron is cut or coal dust, makes sliding ring radially movable dumb, and the equipment other strength of pull bar that makes in service easily causes pull bar fracture.
Summary of the invention
In order to solve the problem of sealing and the pull bar wearing and tearing at medium-speed pulverizer pull bar position, provide a kind of and can thoroughly solve pull bar wearing and tearing, and improve a kind of seal arrangement of the sealability of pull bar.
The utility model solves the technological scheme that its technical problem adopts:
Stuffing box gland divides two halves to be contained on coal grinding machine tie-rod by bolt sleeve, stuffing box gland endoporus is provided with one group of spill sealing air compartment of three groups of Baltimore grooves, in Baltimore groove, be inlaid with seal ring, one group of spill sealing air compartment is connected with the sealing air in tie-rod sealing seat by sealing air vent hole, during equipment operation, sealing air enters spill sealing air compartment by sealing air vent hole, and then the gap forming through stuffing box gland top and pull bar enters coal pulverizer inside and form malleation, make coal dust foreign material etc. can not enter pull rod seal device inside; Stuffing box gland and tie-rod sealing seat form radial seal structure, for the ease of maintenance and reduction later maintenance cost, set up one group of wear-resistant seal flange between stuffing box gland and sealing seat.
The beneficial effects of the utility model are as follows: (one) good sealing effect: can utilize fully the seal action of sealing air, obstruction coal dust foreign material etc. enter stuffing box gland inside; (2) working life of energy extending pull rod: pull bar and stuffing box gland contact component wear ring material adopt copper, can not produce wearing and tearing to pull bar; (3) configuration design is reasonable: stuffing box gland upper sleeve gasket top is taper, is unfavorable for the accumulation of coal dust and foreign material, effectively avoids dust foreign material etc. to enter black box inside; (4) stuffing box gland radial motion is flexible: infinite place device between stuffing box gland and sealing seat, without bite phenomenon, can guarantee that pull bar radial motion is flexible.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described further.
Accompanying drawing 1 is existing medium-speed pulverizer pull rod seal device structural representation;
In Fig. 1: 1 pull bar, 13 sliding rings, 14 slip limiting stoppers, 15 tie-rod sealing seats.
Accompanying drawing 2 is the utility model structural representation;
In Fig. 2: 1 pull bar, 2 stuffing box glands, 3 seal rings, 4O type rubber ring, 5 stuffing box gland erection bolts, 6 stuffing box gland bottom wear-resistant seal flanges, 7 sealing seat wear-resistant seal flanges, 8 tie-rod sealing seats, 9 wear-resisting flange fixing bolts, 10 Baltimore grooves, 11 spill sealing air compartments, 12 sealing air vent holes.
Embodiment
The utility model is applied in existing seal arrangement, and embodiment as shown in drawings.
In medium-speed pulverizer, remove black box in former pull rod seal device (13) (14), leave tie-rod sealing seat (15), to parts of the present utility model are installed.
The installation of pull bar seal apparatus: first sealing seat wear-resistant seal flange (7) is fixed on tie-rod sealing seat (8) by wear-resisting flange fixing bolt (9) during installation, then stuffing box gland bottom wear-resistant seal flange (6) is installed in to stuffing box gland (2) bottom by wear-resisting flange fixing bolt (9), check that whether sealing air vent hole (12) is unobstructed with spill sealing air compartment (11), three groups of seal rings (3) are fixed on pull bar (1) by O type rubber ring (4), mounting point should be corresponding with stuffing box gland (2) inner concave shape groove (10), then stuffing box gland (2) is set on pull bar (1) by bolt (5), during installation, confirm that seal ring (3) enters in Baltimore groove (10), stuffing box gland sealed bottom flange (6) contacts steadily with sealing seat top wear-resistant seal flange (7), guarantee that gapless is without bite phenomenon.
Claims (5)
1. a medium-speed pulverizer pull bar upper sealing device, it is characterized in that: stuffing box gland (2) is sleeved on pull bar (1), in stuffing box gland (2), be provided with and in three groups of Baltimore grooves (10), be inlaid with seal ring (3), one group of spill sealing air compartment (11) is communicated with tie-rod sealing seat (8) inner sealing wind facies by sealing air vent (12), stuffing box gland (2) installing and tie-rod sealing seat (8) top.
2. medium-speed pulverizer upper connecting rod seal arrangement according to claim 1, is characterized in that: stuffing box gland (2) minute two-part form, and by stuffing box gland erection bolt (5), are assembled into annular mechanism, is convenient in the inner dismounting of medium-speed pulverizer.
3. medium-speed pulverizer upper connecting rod seal arrangement according to claim 1, is characterized in that: seal ring (3) minute two-part form an annulus, are embedded in stuffing box gland (2) Baltimore groove (10).
4. medium-speed pulverizer upper connecting rod seal arrangement according to claim 1, is characterized in that: described stuffing box gland (2) passes through the formation radial seal structure of stuffing box gland (2) self gravitation with tie-rod sealing seat (8) through wear-resistant seal flange (6) and (7).
5. medium-speed pulverizer pull rod seal device according to claim 1, is characterized in that: described stuffing box gland (2) top is cone structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320612712.XU CN203477324U (en) | 2013-09-24 | 2013-09-24 | Sealing device for pull rod of medium-speed coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320612712.XU CN203477324U (en) | 2013-09-24 | 2013-09-24 | Sealing device for pull rod of medium-speed coal mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203477324U true CN203477324U (en) | 2014-03-12 |
Family
ID=50225655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320612712.XU Expired - Fee Related CN203477324U (en) | 2013-09-24 | 2013-09-24 | Sealing device for pull rod of medium-speed coal mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203477324U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108612848A (en) * | 2018-06-06 | 2018-10-02 | 新兴铸管股份有限公司 | A kind of lime preheater push rod seal structure |
| CN109382196A (en) * | 2017-08-13 | 2019-02-26 | 大唐临清热电有限公司 | Power plant coal machine tie-rod sealing attachment device |
-
2013
- 2013-09-24 CN CN201320612712.XU patent/CN203477324U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109382196A (en) * | 2017-08-13 | 2019-02-26 | 大唐临清热电有限公司 | Power plant coal machine tie-rod sealing attachment device |
| CN108612848A (en) * | 2018-06-06 | 2018-10-02 | 新兴铸管股份有限公司 | A kind of lime preheater push rod seal structure |
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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: 20170616 Address after: 075499, Zhangjiakou, Hebei, Huailai County town of sand west street, Beijing red business center, No. 4-27 Patentee after: Zhangjiakou Yu Da Power Tech Corp. Inc. Address before: 075400 Zhangjiakou City, Hebei province Huailai County town of Sha Fu Qian Xi Jie Washington Yee District 207 Building Room 301 unit 1 Patentee before: Zhao Xindong |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140312 Termination date: 20190924 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |