CN202451828U - Discharge pipe sealing pair of center coal feeder - Google Patents
Discharge pipe sealing pair of center coal feeder Download PDFInfo
- Publication number
- CN202451828U CN202451828U CN2012200415307U CN201220041530U CN202451828U CN 202451828 U CN202451828 U CN 202451828U CN 2012200415307 U CN2012200415307 U CN 2012200415307U CN 201220041530 U CN201220041530 U CN 201220041530U CN 202451828 U CN202451828 U CN 202451828U
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- Prior art keywords
- ring
- discharge pipe
- axis
- bulge loop
- sealing pair
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- Expired - Fee Related
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Abstract
The utility model discloses a discharge pipe sealing pair of a center coal feeder. The discharge pipe sealing pair is provided with a convex ring and a concave ring; the convex ring and the concave ring have the same inner diameter and outer diameter; as for the opposite two ring surfaces of the convex ring and the concave ring, one surface is provided with 3-6 ring bulges of which the axes are on the same straight line with the axis of the ring along the circumference of the ring, and the other surface is provided with 3-6 ring grooves which are matched with the 3-6 ring bulges along the ring circumference and the axes of which are on the same straight line with the axis of the ring; and oil injection holes communicated with the groove bottom are uniformly distributed on the periphery of the ring with grooves. According to the utility model, the bulges on the concave ring are inserted into the ring grooves on the convex ring, the concave ring and the convex ring form labyrinth seal, and the labyrinth seal realizes a fluid friction effect and a flow contraction effect on the fluid; a thermodynamic effect is also realized on gas, namely thermal conversion of gas in the labyrinth caused by compression or expansion; and the discharge pipe sealing pair disclosed by the utility model ensures good sealing property on the fluid as well as tight sealing, can realize strict sealing, and has long service life.
Description
Technical field
The utility model relates to a kind of accessory of center coal-feeding conveyer of boiler of power plant coal supply system, particularly a kind of center coal-feeding conveyer discharge pipe of boiler of power plant coal supply system and the sealing pair between the outer cylinder body.
Background technique
The boiler of power plant coal supply system has the center coal-feeding conveyer; The center coal-feeding conveyer has outer cylinder body; Outer cylinder body have up the cylindrical shape feed bin and below round platform tubular baiting bucket, rotatable unloading arm is arranged at the bottom in the feed bin, is connected with rotatable cylindrical shape discharge pipe between the following nozzle of feed bin and the last nozzle of baiting bucket; The internal diameter of the last nozzle of the upper/lower terminal mouth of pipe of discharge pipe and the following nozzle of outer cylinder body and baiting bucket is identical; The axis of the axis of feed bin, the axis of baiting bucket and discharge pipe is on same straight line, and discharge pipe has the cylindrical shape body, and the excircle of cylindrical shape body is connected with the circular radial annular connecting plate.Be connected with rotary actuator between unloading arm in the coal-feeding conveyer feed bin of center and the discharge pipe, the connecting plate of discharge pipe excircle is connected with the rotating driving device of discharge pipe.
During use, be full of coal in the feed bin above outer cylinder body, the unloading arm that drives discharge pipe rotation and then driving feed bin inner bottom part with rotating driving device rotates, and discharges the coal in the feed bin equably through discharge pipe and baiting bucket.
The outer cylinder body of center coal-feeding conveyer is to be fixed on the frame; During use; Feed bin and baiting bucket are actionless, and discharge pipe is to drive with rotating driving device to rotate, and between the nozzle gap are movingly being arranged on the following nozzle of the upper/lower terminal mouth of pipe of discharge pipe and outer cylinder body and the baiting bucket; In order to prevent that the center coal-feeding conveyer from leaking coal from above-mentioned gap movingly when moving, be equipped with the motive sealing pair in above-mentioned gap movingly.
In the existing technology, the motive sealing pair that install in gap movingly between the last nozzle of the upper/lower terminal of center coal-feeding conveyer discharge pipe and the following nozzle of outer cylinder body and baiting bucket is to be trapped among the stuffing box in the outside, gap and the annular felt bar in stuffing box movingly.
The sealing of this center coal-feeding conveyer discharge pipe and outer cylinder body is imprecision very, can not realize strictly sealing close, and sealing material felt bar intensity is low, and working life is short, and only after short-term was used, will causing movingly, clearance seal lost efficacy.Can cause a large amount of coal dusts to leak outside movingly after the seal failure in gap; The coal dust that leaks outside is accumulated on the ground of coal-feeding conveyer below, center, and severe contamination has been brought to production environment in the showy space around of tiny coal dust; The coal dust labor intensity that collection leaks outside is very big; Operator's work serious harm under rugged environment is healthy, and coal dust gets into transmission device, can influence the working life of equipment and bring potential safety hazard to equipment.
Summary of the invention
The purpose of the utility model is in order to overcome above-mentioned deficiency, and it is tight to propose a kind of sealing, can realize strictly sealing close, the center coal-feeding conveyer discharge pipe sealing pair of long service life.
The utility model is realized with following method.
Center coal-feeding conveyer discharge pipe sealing pair has bulge loop and scrobicular ring; Bulge loop is identical with the internal diameter of scrobicular ring; Bulge loop is identical with the external diameter of scrobicular ring, and bulge loop and scrobicular ring have two relative toroidal surfaces, on the bulge loop toroidal surface relative with scrobicular ring; Have along the ring of axis on same straight line of 3 ~ 6 axis of bulge loop circumference and bulge loop protruding; On the scrobicular ring toroidal surface relative with bulge loop, have along 3 ~ 6 of the scrobicular ring circumference with above-mentioned bulge loop on the axis that matches of 3 ~ 6 ring convexities and the toroidal cavity of axis on same straight line of scrobicular ring, the excircle of scrobicular ring is evenly equipped with and the oil hole that communicates at the bottom of the groove.
Bulge loop and scrobicular ring lump together the composition sealing pair with matching.During installation; Above-mentioned sealing pair is installed between the upper orifice of the following nozzle of center coal-feeding conveyer outer cylinder body and discharge pipe; Above-mentioned sealing pair is installed, in the protruding toroidal cavity that inserts on the scrobicular ring of the ring on the bulge loop between the lower nozzle of nozzle and discharge pipe on the coal-feeding conveyer baiting bucket of center.
During use; In the groove of oil hole on scrobicular ring of the excircle of scrobicular ring, inject oiliness graphite mud; Be full of coal in the feed bin above outer cylinder body; The unloading arm that drives discharge pipe rotation and then driving feed bin inner bottom part with rotating driving device rotates, and discharges the coal in the feed bin equably through discharge pipe and baiting bucket.
The utility model discharge pipe is bulge loop and the scrobicular ring that matches with sealing pair between the outer cylinder body; Ring convexity on the bulge loop is inserted in the toroidal cavity on the scrobicular ring; Form labyrinth sealing between bulge loop that matches and the scrobicular ring; The labyrinth sealing convection cell has the fluid mechanics effect, comprising fluid mill inhibition effect, a fluid stream blockage effect; To gas, also has thermomechanical effect, i.e. gas thermal conversion because of compressing or expanding and produce in the labyrinth; In addition, also have " ventilative effect " etc., the labyrinth sealing convection cell has sealing preferably; Oiliness graphite mud is particularly arranged in the labyrinth sealing gap,, the good seal performance of the utility model convection cell; Seal tight, can realize strictly sealing close, long service life; The center coal-feeding conveyer of using the utility model can not leak coal when operation, the working environment cleaning.
Below in conjunction with accompanying drawing, the utility model is done explanation further.
Description of drawings
Fig. 1 is the main cross-sectional schematic when being installed on the coal-feeding conveyer of center according to a kind of center coal-feeding conveyer discharge pipe sealing pair that the invention scheme of the utility model proposes;
Fig. 2 is the schematic top plan view of the center coal-feeding conveyer discharge pipe sealing pair in Fig. 1;
Fig. 3 is the I place enlarged diagram of Fig. 1;
Fig. 4 is the II place enlarged diagram of Fig. 1.
Embodiment
Among Fig. 1 ~ Fig. 4; Center coal-feeding conveyer discharge pipe sealing pair 1 has bulge loop 2 and scrobicular ring 3, and bulge loop is identical with the internal diameter of scrobicular ring, and bulge loop is identical with the external diameter of scrobicular ring; Bulge loop and scrobicular ring have relative two toroidal surfaces 4,5; On the bulge loop toroidal surface 4 relative with scrobicular ring, have along the ring of axis on same straight line of 3 ~ 6 axis of bulge loop circumference and bulge loop protruding 6, on the scrobicular ring toroidal surface relative 5 with bulge loop; Have along 3 ~ 6 of the scrobicular ring circumference with above-mentioned bulge loop on the axis that matches of 3 ~ 6 ring convexities and the toroidal cavity 7 of axis on same straight line of scrobicular ring, the excircle of scrobicular ring is evenly equipped with and the oil hole that communicates at the bottom of the groove 8.
Claims (1)
1. center coal-feeding conveyer discharge pipe sealing pair; It is characterized in that: bulge loop and scrobicular ring are arranged; Bulge loop is identical with the internal diameter of scrobicular ring; Bulge loop is identical with the external diameter of scrobicular ring, in bulge loop two toroidal surfaces relative with scrobicular ring, has along the ring convexity of axis on same straight line of 3 ~ 6 axis and this ring of this ring circumference on the face; Have on another face along 3 ~ 6 axis that match with above-mentioned 3 ~ 6 ring convexities of this ring circumference and the toroidal cavity of axis on same straight line of this ring, the excircle with ring of groove is evenly equipped with and the oil hole that communicates at the bottom of the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200415307U CN202451828U (en) | 2012-02-09 | 2012-02-09 | Discharge pipe sealing pair of center coal feeder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200415307U CN202451828U (en) | 2012-02-09 | 2012-02-09 | Discharge pipe sealing pair of center coal feeder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202451828U true CN202451828U (en) | 2012-09-26 |
Family
ID=46867694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200415307U Expired - Fee Related CN202451828U (en) | 2012-02-09 | 2012-02-09 | Discharge pipe sealing pair of center coal feeder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202451828U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102563075A (en) * | 2012-02-09 | 2012-07-11 | 辽宁调兵山煤矸石发电有限责任公司 | Sealing pair for discharge pipe of central coal feeder |
-
2012
- 2012-02-09 CN CN2012200415307U patent/CN202451828U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102563075A (en) * | 2012-02-09 | 2012-07-11 | 辽宁调兵山煤矸石发电有限责任公司 | Sealing pair for discharge pipe of central coal feeder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120926 Termination date: 20180209 |