Pottery double-flashboard flying dust valve
The utility model belongs to valve field, particularly about a kind of gate valve.The utility model is applicable to the valve of dry ash, cement, the contour wear medium conveyance conduit of powder.
In dry ash pneumatic conveying process pipelines such as mine, colliery, cement plant, power plant, medium is carried through the situation of be everlasting pressurization or negative pressure.Carry the pipeline of dry ash such as power plant's strength, be in pipeline, to feed pressure or vacuumize to carry, dry ash is high-speed motion under gas pressure, just as the emery wheel that rotates at a high speed, pipe-line equipment is produced wearing and tearing fast, general Structural Hardware valve is worn very soon and loses break-in facility, and working life is very short.
Summary of the invention
The purpose of this utility model is the shortcoming that exists at prior art, provides that a kind of wear-resisting property is good, the ceramic double-flashboard flying dust valve of long service life.
The technical solution of the utility model comprises valve body, valve seat, flashboard, valve rod, driving mechanism, Sealing and assembling set, is provided with stuffing seal between valve rod and the valve body, and flashboard adopts the double-flashboard structure, is connected the valve rod lower end by the flashboard frame; It is floating type from movable sealing structure mainly to be that flashboard adopts, and the described floating type circle hole sleeve that is flashboard by the back side from movable sealing structure is contained on the cylinder of flashboard frame both sides, can rotate with flashboard frame cylinder circumferencial direction; The flashboard frame is shaped on the through hole concentric with valve channel, mounting spring in this through hole, and the both ends of the spring roof pressure is at the flashboard back side; Valve seat is embedded on the valve body by the ceramic seal circle to be formed, and the flashboard sealing surface is embedded on the flashboard substrate by ceramic-seal ring to be formed.
In above technological scheme, valve body is made up of main valve body and side valve body, and main valve body both sides and side valve body are tightly connected by bolt.
In above technological scheme, stuffing seal adopts spring attachment, this spring attachment is made up of filler gland and gland spring, and filler gland lower end is fitted on the filler, and the gland spring is installed between the spring capping of filler gland upper end and driving mechanism lower end.
The utility model has the advantages that: flashboard adopts floating type from movable sealing structure, and flashboard can be rotated in opening-closing process, realizes the uniform wear of sealing surface circumference; Valve seat and flashboard sealing surface adopt stupalith, have wear-resisting, corrosion resistant, anti-characteristics such as wash away.Its sealability is reliable, long product lifecycle.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Ceramic double-flashboard flying dust valve as shown in Figure 1, comprise valve body, valve seat 5, flashboard 3, valve rod 8, driving mechanism 14, Sealing and assembling set, be provided with stuffing seal between valve rod 8 and the valve body, flashboard 3 adopts the double-flashboard structure, is connected valve rod 8 lower ends by flashboard frame 7; Flashboard 3 adopts floating type from movable sealing structure, the described floating type circle hole sleeve that is flashboard 3 by the back side from movable sealing structure is contained on the cylinder of flashboard frame 7 both sides, can rotate with flashboard frame 7 cylinder circumferencial directions, in opening-closing process, realize the uniform wear of flashboard sealing surface and sealing surface of seat by the rotation of flashboard 3, improve the sealability of sealing pair; Flashboard frame 7 is shaped on the through hole concentric with valve channel, and mounting spring 4 in this through hole, and spring 4 two ends roof pressures are at flashboard 3 back sides, and behind sealing surface wear, spring 4 promotes flashboard 3 and compresses valve seat 5, improves the performance that is sealed and matched of flashboard 3 and valve seat 5; Valve seat 5 is embedded on the valve body by the ceramic seal circle to be formed, and flashboard 3 sealing surfaces are embedded on flashboard 3 substrates by ceramic-seal ring 6 to be formed, and makes valve seat 5 and flashboard 3 sealing surfaces have high temperature resistant, wear-resistant, abrasion resistance energy.
Valve body is made up of main valve body 1 and side valve body 2, and main valve body 1 both sides and side valve body 2 are by bolt 9 fixed seal connections.Stuffing seal is arranged between main valve body 1 and the valve rod 8.The guide wall that main valve body 1 internal chamber wall moves up and down as flashboard 3, main valve body 1 adopts eccentric structure with the center line of side valve body 2, and the center line of main valve body 1 has a throw of eccentric above side valve body 2 center lines.
Stuffing seal adopts spring attachment, this spring attachment is made up of filler gland 11 and gland spring 12, filler gland 11 lower ends are fitted on the filler 10, gland spring 12 is installed between the spring capping of filler gland 11 upper ends and driving mechanism 14 lower ends, this gland spring 12 can compress filler 10 automatically after filler 10 wearing and tearing, improve the lumen sealing reliability.Driving mechanism 14 adopts cylinder assembly, and cylinder assembly is fixedly mounted on the main valve body 1 by cylinder column 13.