CN105587882A

CN105587882A - Eccentric rotary regulating valve

Info

Publication number: CN105587882A
Application number: CN201410573996.5A
Authority: CN
Inventors: 施健海; 张�杰; 吴斌
Original assignee: Jiangsu Shentong Valve Co Ltd
Current assignee: Jiangsu Shentong Valve Co Ltd
Priority date: 2014-10-24
Filing date: 2014-10-24
Publication date: 2016-05-18

Abstract

An eccentric rotary regulating valve comprises a valve body, and a valve core inside the valve body; the valve core is connected with a valve rod; a valve seat is arranged at a medium inlet within the valve body; the valve seat is sealed with a valve body by means of a corrugated pipe; the valve core is of a split structure, and comprises a valve core head, and a valve core body; a hole is formed in a surface, fitted with the valve core body, of the valve core head, and a metal insert with internal threads is inlaid in the hole; a through hole is formed in a surface, fitted with the valve core head, of the valve core body, and a screw goes through the through hole, and is screwed in the metal insert to fixedly connect the valve core head with the valve core body; besides, the valve core head is made of ceramics. The eccentric rotary regulating valve has the beneficial effects that by means of such a connection manner of the valve core head and the valve core body, the screw is effectively protected from being washed out by the medium, and therefore, the connection is enabled to be more reliable, the service life of the valve core head is prolonged, and the cost is reduced.

Description

A kind of eccentric rotary regulating valve

Affiliated technical field

The present invention relates to a kind of control valve, particularly a kind of eccentric rotary regulating valve being applied in Coal Chemical Industry CWS system.

Background technology

The control valve applying working condition harshness of applying in Coal Chemical Industry CWS system, fluid media (medium) is mainly the high coal slurry of solid content, Heisui River, pulp water and buck, contains strong corrosive media and the solid particles such as chlorion, ammonia, sylvite, hydrogen sulfide or phosphoric acid. Existing eccentric rotary valve (referring to Fig. 1) is pile-up welding hard alloy on spool, and overlay cladding is thinner, at restriction place, fluid media (medium) is mixing hard particles flow at high speed, has powerful kinetic energy, and spool is easily etched, life-span is extremely short, only has four the service life of a deck valve, 50 days; The mode that improved eccentric rotary valve adopts valve core head to be connected with valve core by securing member, its securing member is exposed to side medium often, (referring to Fig. 2), use after a period of time, easily cause securing member to lose efficacy through the erosion corrosion of medium, thereby cause spool to damage, service life is short.

Summary of the invention

In order to overcome the above-mentioned shortcoming of existing eccentric rotary regulating valve, the invention provides the eccentric rotary regulating valve of a kind of wear-resistant, resistance to erosion, long service life and convenient maintenance and replacement

The technical solution adopted for the present invention to solve the technical problems is, a kind of eccentric rotary regulating valve, comprise the core assembly of valve body and valve inner, core assembly is connected with valve rod, medium inlet place in valve body is provided with valve seat, between valve seat and valve body by sylphon seal, core assembly is fabricated structure, comprise valve core head and valve core, the surperficial perforate fitting with valve core on valve core head, in hole, be inlaid into and be with female metal insert, the surface fitting with valve core head on valve core has through hole, screw screws in metal insert valve core head is fixedly connected with valve core through through hole, the material of valve core head is pottery.

The invention has the beneficial effects as follows: core assembly is made up of valve core head and valve core two parts, built-inly on valve core head be with female metal insert, on valve core with through hole, screw screws in metal insert valve core head is fixedly connected with valve core through through hole, this connected mode has effectively protected screw to avoid washing away of medium, make connection more reliable, extended the service life of valve core head, reduced cost; The material of valve core head and valve seat is ceramic material, preferably nanoscale zirconia, and this material has ultra-fine grain and high hardness, obdurability and good corrosion resistance, has effectively extended valve whole service life.

Brief description of the drawings

Fig. 1 is the structural representation of prior art 1;

Fig. 2 is the structural representation of prior art 2;

Fig. 3 is the structural representation of embodiment.

In figure: 1. valve body; 2. valve rod; 3. valve core; 4. valve seat; 5. bellows; 6. valve core head; 7. metal insert; 8. screw.

Detailed description of the invention

As shown in Figure 3, a kind of eccentric rotary regulating valve, comprise the core assembly of valve body 1 and valve inner, core assembly is connected with valve rod 2, medium inlet place in valve body is provided with valve seat 4, between valve seat 4 and valve body 1, seal by bellows 5, core assembly is fabricated structure, comprise valve core head 6 and valve core 3, the surperficial perforate fitting with valve core 3 on valve core head 6, in hole, be inlaid into and be with female metal insert 7, the surface fitting with valve core head 6 on valve core 3 has through hole, screw 8 screws in metal insert 7 valve core head 6 is fixedly connected with valve core 3 through through hole, the material of valve core head 6 is pottery, this connected mode has effectively protected screw 8 to avoid washing away of medium, make to connect more reliable, extend the service life of valve core head 6, reduce cost.

In order further to extend the service life of eccentric rotary regulating valve, valve body 1 inside surfacing carbide alloy, carbide alloy specifically can adopt nickel-base alloy, also can select other under Coal Chemical Industry operating mode, to have compared with the carbide alloy of high-wearing feature, decay resistance, and design hard alloy layer 3～5mm, hardness is up to more than HRC65.

Claims

1. an eccentric rotary regulating valve, comprise the core assembly of valve body and valve inner, core assembly is connected with valve rod, medium inlet place in valve body is provided with valve seat, between described valve seat and valve body by sylphon seal, it is characterized in that: described core assembly is fabricated structure, comprise valve core head and valve core, the surperficial perforate fitting with valve core on described valve core head, in hole, be inlaid into and be with female metal insert, the surface fitting with valve core head on described valve core has through hole, screw screws in described metal insert valve core head is fixedly connected with valve core through described through hole, the material of described valve core head is nanoscale zirconia.