CN202674333U - Self-closing ball valve - Google Patents
Self-closing ball valve Download PDFInfo
- Publication number
- CN202674333U CN202674333U CN 201220294921 CN201220294921U CN202674333U CN 202674333 U CN202674333 U CN 202674333U CN 201220294921 CN201220294921 CN 201220294921 CN 201220294921 U CN201220294921 U CN 201220294921U CN 202674333 U CN202674333 U CN 202674333U
- Authority
- CN
- China
- Prior art keywords
- ball valve
- chuck seat
- self
- valve body
- movable pin
- 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 - Fee Related
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Abstract
The utility model discloses a self-closing ball valve, which belongs to pulverized coal injection equipment in a pulverized coal injection process of a blast furnace. The self-closing ball valve comprises a valve body and a ball valve inlet chuck seat, and is characterized in that the inlet chuck seat is movably connected with the front end of the valve body, wherein a concave surface is arranged around an inner port of a central inner hole of the inlet chuck seat; a movable pin is fixedly arranged on the inner wall of the valve body; and another movable end of the movable pin is provided with a convex plug which is matched with the concave surface at the inner end of the inlet chuck seat. In use, when an injection gun is inserted, the convex plug is lifted by the injection gun to move upwards around the movable pin; when the injection gun is pulled out, the convex plug falls down around the movable pin under the action of the dead weight and the hot air pressure of an air port of the blast furnace to seal the central inner hole of the inlet chuck seat; and the self-closing ball valve has the advantages of reliable action, convenience in slag removal and maintenance and long service life.
Description
Technical field
The utility model relates to the breeze blowing equipment in a kind of pulverized coal injection powder craft, particularly a kind of auto-closed ball valve.
Background technique
In the pulverized coal injection powder craft, need pulverized coal gun is inserted and secured in the blast-furnace tuyere belly pipe by ball valve, in the existing bevel-type ball valve, when spray gun connects dop seat endoporus insertion blast-furnace tuyere soon from ball valve, the steel ball of ball valve inside is backed down by gun shot, connect soon the dop seat with ball valve and be connected fast by the dop that connects soon that is fixed on the gun shot and tie stuffing box packing, steel ball falls on the cone valve inwall, and easy dust stratification slag at the bottom of the cone of valve body, cause the steel ball position to be raised, affect the insertion of spray gun.When spray gun was transferred to blast-furnace tuyere, the steel ball of ball valve inside is autoshutdown under the effect of high furnace pressure, and control furnace high-temperature gas does not leak, because steel ball is heavier, then can't automatically steel ball be promoted when the hot-blast pressure in the blast furnace is on the low side.
Summary of the invention
The purpose of this utility model is in order to overcome the above-mentioned deficiency of prior art, and provides a kind of reliable in action, scarfing cinder, easy to maintenance, the auto-closed ball valve of long service life.
The purpose of this utility model is achieved in that the auto-closed ball valve comprises valve body, ball valve import dop seat, it is characterized in that ball valve import dop seat and valve body front end are flexibly connected, concave surface is arranged around the inner end mouth of ball valve import dop seat central bore, fix a loose pin on the valve interior wall, the protruding plug that another movable end of loose pin has the concave surface with ball valve import dop seat inner end to match, guarantee when protruding plug falls can reliable shutoff ball valve import dop seat central bore the inner end mouth.
The utility model is owing to adopting above architecture advances, in the use, when spray gun inserts, protruding plug is moved on flexibly around loose pin by gun shot jack-up, and when spray gun was transferred to, protruding plug fell and seals ball valve import dop seat central bore around loose pin under himself gravity and blast-furnace tuyere hot-blast pressure, prevent that hot air flow leaks in the blast furnace, reliable in action, scarfing cinder, easy to maintenance, long service life.
Description of drawings
Fig. 1 is existing bevel-type ball valve structural representation;
Fig. 2 is the utility model example structure schematic diagram.
Embodiment
Now illustrated embodiment is made detailed description to the utility model by reference to the accompanying drawings.
As shown in Figure 2, the auto-closed ball valve comprises valve body 1, ball valve import dop seat 5, ball valve import dop seat 5 is flexibly connected by screw thread with valve body 1 front end, hemisphere concave surface 4 is arranged around the inner end mouth of ball valve import dop seat 5 central bore, fix a loose pin 3 on valve body 1 inwall, the hemisphere plug 2 that another movable end of loose pin 3 has the hemisphere concave surface 4 with ball valve import dop seat 5 inner ends to match, guarantee when hemisphere plug 2 falls can reliable shutoff ball valve import dop seat 5 central bore the inner end mouth.
Claims (1)
1. auto-closed ball valve, comprise valve body (1), ball valve import dop seat (5), it is characterized in that ball valve import dop seat (5) and valve body (1) front end are flexibly connected, concave surface (4) is arranged around the inner end mouth of ball valve import dop seat (5) central bore, fix a loose pin (3) on valve body (1) inwall, the protruding plug (2) that another movable end of loose pin (3) has the concave surface (4) with ball valve import dop seat (5) inner end to match, guarantee when protruding plug (2) falls can reliable shutoff ball valve import dop seat (5) central bore the inner end mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220294921 CN202674333U (en) | 2012-06-21 | 2012-06-21 | Self-closing ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220294921 CN202674333U (en) | 2012-06-21 | 2012-06-21 | Self-closing ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202674333U true CN202674333U (en) | 2013-01-16 |
Family
ID=47495239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220294921 Expired - Fee Related CN202674333U (en) | 2012-06-21 | 2012-06-21 | Self-closing ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202674333U (en) |
-
2012
- 2012-06-21 CN CN 201220294921 patent/CN202674333U/en not_active Expired - Fee Related
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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 |
Granted publication date: 20130116 Termination date: 20140621 |
|
| EXPY | Termination of patent right or utility model |