CN102466057A

CN102466057A - Air bag valve

Info

Publication number: CN102466057A
Application number: CN2010105357290A
Authority: CN
Inventors: 张松
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-11-09
Filing date: 2010-11-09
Publication date: 2012-05-23

Abstract

The invention discloses an air bag valve applied in a blast furnace bag dedusting system in the metallurgy industry. In the air bag valve, no relative friction exists in sealing rings; the service life is long; sealing is realized by elastic deformation; and the air bag valve is reliable in sealing.

Description

Air bag valve

Affiliated technical field

The present invention relates to block on a kind of pipeline the valve of media flow, thereby specifically a kind of pressurized gas that adopts makes the seal ring expansion realize the valve of sealing.

Background technique

The forms that many use Unloading ball valves and star revolving plow reclaimer make up in metallurgy industry furnace cloth bag dust-removing system at present, Unloading ball valve adopts stationary structure, at the step place of valve seat several springs is housed; Lean on the elastic force of spring that valve seat is pressed to spheroid, realize sealing, in course of action because the effect of spring; Spheroid is in valve seat always and contacts abrasion state, and open and close torque is big, and the phenomenon that blocks is serious; Seal ring is easy to wear, causes leakage, and valve is short working life.

Summary of the invention

Big in order to overcome existing Unloading ball valve open and close torque, the phenomenon that blocks is serious, and seal ring is easy to wear; The deficiency that working life is short, the present invention provides a kind of seal ring when valve opening, to reduce pressure, bounce back, and is contactless between spool and the seal ring; Keying moment is little, the air bag valve of long service life.

The technical solution adopted for the present invention to solve the technical problems is a kind of air bag valve, comprises valve body, valve gap, goes up valve shaft, lower valve shaft, drive unit, and valve body and valve gap pass through Bolt Connection; Spool is supported in the valve body through last valve shaft and lower valve shaft; Seal ring also is housed in the valve body, studs with the metal inner lining circle that has a plurality of radial direction through hole in the seal ring, on valve body, also have an inlet hole; The inlet hole external compressed air interiorly communicates with the metal inner lining circle.

Seal ring is a ring-type semi-surrounding structure, and its material is a nitrile butadiene rubber, or silicone rubber; After assembling, 1 to 1.5 mm clearance is arranged between spool and the seal ring.

The invention has the beneficial effects as follows that seal ring reduces pressure when valve opening, bounces back, contactless between spool and the seal ring, keying moment is little, and seal ring does not have relative friction, long service life; When valve was closed fully, the seal ring inflation realized that resiliently deformable seals, and sealing is reliable, and leak-down rate is zero.

Below in conjunction with accompanying drawing and embodiment the present invention is described further

Fig. 1 is embodiment's a tectonic maps;

Fig. 2 is the partial enlarged drawing of I among Fig. 1;

Among the figure: 1. drive unit; 2. valve gap; 3. inlet hole; 4. seal ring; 5. through hole; 6. metal inner lining circle; 7. end cap; 8. spool; 9. lower valve shaft; 10. go up valve shaft; 11. valve body.

Embodiment

As shown in Figure 1, a kind of air bag valve comprises valve body 11, valve gap 2, goes up valve shaft 10, lower valve shaft 9, drive unit 1 and end cap 7; Valve body 11 passes through Bolt Connection with valve gap 2, and end cap 7 passes through bolted on connection with valve body 11, and spool 8 is supported in the valve body 11 through last valve shaft 10 and lower valve shaft 9; The rubber seal 4 of ring-type semi-surrounding structure also is housed in the valve body 11, studs with the metal inner lining circle 6 that has a plurality of radial direction through hole 5 in the seal ring 4, on valve body 11, also have an inlet hole 3; Inlet hole 3 external compressed airs; In communicate with metal inner lining circle 6, after the assembling, 1 to 1.5 mm clearance is arranged between spool 8 and the seal ring 4.Operating principle is following: after valve closing puts in place; Pressurized air gets into metal inner lining circle 6 through inlet hole 3, because metal inner lining circle 5 has a plurality of radial direction through hole 5 along circumference, pressurized air gets into radial direction through hole 5; Seal ring 4 inflations; Realize resiliently deformable, make seal ring 4 and spool 8 be in tight contact condition, realize sealing; When ash is unloaded in the needs unlatching, discharge pressurized air, seal ring 4 decompressions, retraction; Owing to there is 1 to 1.5 mm clearance, spool 8 is contactless with seal ring 4, then between spool 8 and the seal ring 4; Drive unit 1 drives to drive goes up valve shaft 10, and drive spool 8 revolves and turn 90 degrees valve opening.

Claims

1. an air bag valve comprises valve body, valve gap, goes up valve shaft, lower valve shaft, drive unit, spool, end cap, seal ring, and valve body and valve gap pass through Bolt Connection; Spool is supported in the valve body through last valve shaft and lower valve shaft, and seal ring is housed in the valve body, it is characterized in that: stud with the metal inner lining circle in the described seal ring; Described metal inner lining circle upper edge circumference has a plurality of radial direction through hole; On described valve body, also have an inlet hole, the inlet hole external compressed air interiorly communicates with the metal inner lining circle.

2. according to the described air bag valve of claim (1), it is characterized in that: described seal ring is a ring-type semi-surrounding structure.

3. according to claim (1) or (2) described air bag valve, it is characterized in that: the material of described seal ring is a nitrile butadiene rubber, or silicone rubber.

4. according to claim (1) or (2) described air bag valve, it is characterized in that: 1 to 1.5 mm clearance is arranged between described spool and the described seal ring.