CN2212687Y

CN2212687Y - Ash stop valve

Info

Publication number: CN2212687Y
Application number: CN 95230426
Authority: CN
Inventors: 李�真
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-03-07
Filing date: 1995-03-07
Publication date: 1995-11-15
Anticipated expiration: 2005-03-07

Abstract

The utility model relates to an ash stop valve, comprising an upper valve body, a lower valve body, a valve seat which is assembled in the lower valve body and a valve flap with a valve rod, wherein, a retaining ring which is the hole net type with a guide plate is arranged at the bottom of the valve flap. The outer diameter of the retaining ring is the same with the inner diameter of the through hole of the valve seat. The ash stop valve not only can be used for conveying the massive ash slurry, but also the slurry has strong carrying capacity. The ash stop valve has good sealing effect, convenient maintenance and long service life.

Description

Ash stop valve

The utility model relates to a kind of ore pulp valve that is used for the slurry transporting system, particularly a kind ofly is used to carry the lime-ash stop valve that contains block lime-ash slurry.

At present, used ore pulp valve in ash-slag delivery slurry system, conical shape check valve generally commonly used or plate valve.But contain in the block lime-ash slurry system in conveying and can not adopt above-mentioned valve.Its reason is: though conical shape check valve is simple in structure, the sealing is reliable, when in use occurring block lime-ash in the slurry, often influence its sealability.Can cause sealing malfunctioning when serious, can't normally use.The passing capacity of plate valve is stronger, stress is good in the opening-closing process, initial stage uses sealing effect better, yet after a period of time, flashboard seal ring well damage easily accumulates the solid particle in the slurry in the valve body chamber, cause valve closing not tight, if the frequent starting valve, will reduce valve working life.For preventing that block lime-ash from entering in the slurry pipeline system, adopt water isolation pump ash-slag delivery system mostly, at the head end of transporting system vibrating sieve is set, to remove block lime-ash, improve the usability and the working life of ore pulp valve.But the result makes this system huge, increases equipment investment and amount of maintenance, is unfavorable for wide popularization and application.

The purpose of this utility model provides a kind of improved lime-ash stop valve, and it not only can be used to carry and contains block lime-ash slurry, and the slurry passing capacity is strong, and good sealing effect is easy to maintenance, long service life.

The purpose of this utility model is achieved in that this device comprises upper valve body, following valve body and assembles its interior valve seat and the flap of band valve rod, and wherein the flap bottom is provided with the hole pattern formula back-up ring of tape guide plate, and the back-up ring external diameter is identical with the valve seat through-hole internal diameter.

Because the utility model adopts the conveying of the flap control slurry of special construction, utilize the hole pattern formula back-up ring of its bottom tape guide plate, remove the block lime-ash in the slurry, so this device except that the characteristics with general lime-ash stop valve, can also reach the effect of the lime-ash transporting system that vibrating sieve is set.Therefore, this device not only can be used to carry and contains block lime-ash slurry, and stronger than existing ore pulp valve slurry passing capacity.Its modular construction brings convenience to installation, maintenance, so sealing is reliable, can significantly improve its working life.If the piston set in valve rod and the hydraulic jack is fitted together, utilize position limit switch to open and close by required operating mode control valve.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is a kind of concrete structure longitudinal sectional view of the present utility model.

Fig. 2 is the sectional view of Fig. 1 along the A-A line.

Describe concrete structure of the present utility model in detail according to Fig. 1-2.This device comprises parts such as valve rod 5, flap 11, upper valve body 12, valve seat 13, following valve body 14.Present embodiment adopts the HYDRAULIC CONTROL SYSTEM valve opening and closing, promptly assembles hydraulic systems on upper valve body 12 tops by dividing plate 7.This system comprises parts such as oil cylinder 3, piston 4, cover plate 6, Sealing 2 and position limit switch 1 thereof.Wherein piston 4 fits together with valve rod 5.If adopt manually control, the direct installation and control handwheel in valve rod 5 tops can be got final product.Valve rod 5 underparts are connected flap 11, enter its joining place for preventing the lime-ash in the slurry, and flap 11 tops install sealed protective cover 8 with cushion rubber 9.Flap 11 bottoms are provided with the hole pattern formula back-up ring 15 of tape guide plate 16.Guide plate 16 and back-up ring 15 affixed being integral, the density of its specification and hole pattern arranges according to actual needs and determines that the external diameter of back-up ring 15 is identical with valve seat 13 through hole internal diameters, so that back-up ring 15 is when moving down with flap 11, remove the block lime-ash in the valve seat 13, increase the reliability of valve by slurry.More reliable for the sealing that makes flap 11, on the flap 11 reverse frustoconic conical surfaces, seal ring 10 is set.Adopt seal ring seal between valve seat 13 and upper valve body 12, the following valve body 14, can prevent effectively that slurry from leaking outside.

During use, utilize control handwheel or control position limit switch 1 piston 4 by hydraulic jack 3, actuate valve stem 5 drives flap 11 liftings, realizes valve opening and closing.When moving on the valve rod 5, flap 11 rises thereupon and lifts off a seat 13, and slurry stream is through valve seat 13 through holes, and block lime-ash passes through along the space of guide plate 16 in the slurry.When valve rod 5 moved down, flap 11 descended gradually near valve seat 13 thereupon.At the back-up ring 15 that has guide plate 16 during near valve seat 13; guide plate 16 is pressed the bulk lime-ash from valve seat 13 through holes earlier; when hole pattern formula back-up ring 15 enters valve seat 13 through holes; stop particle lime-ash to pass through fully greater than the aperture; play the buffer action of vibrating screen mesh; guarantee that flap 11 compresses valve seat 13, reaches the purpose of throttle down.

The utility model can be widely used in power plant, mine ore dressing factory etc. and contain block lime-ash slurry transportation pipeline, also can be used for other slurry that contains brittle solid and carries.

Claims

1, a kind of lime-ash stop valve comprises upper valve body, following valve body and assembles its interior valve seat and the flap of band valve rod that it is characterized in that the flap bottom is provided with the hole pattern formula back-up ring of tape guide plate, the back-up ring external diameter is identical with the valve seat through-hole internal diameter.

2, stop valve according to claim 1 is characterized in that the flap top that is engaged on the valve rod underpart installs sealed protective cover.

3, stop valve according to claim 1 is characterized in that on the flap reverse frustoconic conical surface seal ring being set.

4, stop valve according to claim 1 is characterized in that being fitted together by piston and valve rod group in the hydraulic jack of position limit switch control.

5, stop valve according to claim 1 is characterized in that valve seat and upper valve body, adopts seal ring to encapsulate between the valve body down.