CN2421463Y

CN2421463Y - Combined wear-resisting residue-removing gate valve

Info

Publication number: CN2421463Y
Application number: CN 99253960
Authority: CN
Inventors: 张恒祥
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-12-08
Filing date: 1999-12-08
Publication date: 2001-02-28
Anticipated expiration: 2009-12-08

Abstract

The utility model relates to a combined wear-resistant residue-removing gate valve used for removing residues and powder granule medium. A valve seat is composed of a middle valve seat (1), left and right flange flow channel connecting pipes (2) (3), flow channel linings (4) (5), and valve seat doorway sealing surfaces (6) (7). A valve plate is composed of a valve plate body (8) and valve plate sealing surfaces (9) (10). A flow passage component is made of wear-resistant materials (wear-resistant alloy of high chromium cast iron, etc., wear-resistant ceramic of chromium corundum, etc., polytetrafluoroethylene, etc.). The utility model has the advantages of three to eight times enhancement of service life than a universal cast iron sluice valve and convenient replacement after worn, and is suitable for residue-removing and material conveying pipelines of electric power industry, metallurgy industry, construction material industry, etc.

Description

The wear-resisting Scum Gate Valves of combined type

The utility model is about gate valve, especially for a kind of combined type wear-resistant sluice valve of discharging lime-ash and powder medium.The runner of its valve seat, doorway sealing surface and flashboard sealing surface all adopt and are equipped with the part that high-abrasive material is made, and combine with fastening piece.

The general gate valve of producing is when being used to discharge lime-ash and powder medium at present, do not take into full account the requirement of wear-resisting aspect because of the material of valve design use, the runner of valve seat, doorway sealing surface and flashboard sealing surface, often by the erosive wear of lime-ash and powder medium, cause the damage of valve, working life is very low.And after valve damaged, because of reasons such as equipment, the user was difficult to repair voluntarily, causes whole of valve to scrap.

For solving this technical problem, in existing technology, whole valve body and the flashboard made of the employing high-abrasive material that has, as patent CN2157370Y, the employing that has serves as a contrast the method for pottery, cast stone on body cavity and flashboard sealing surface, as patent CN2228160, CN2093934, tangible wear-resisting effect is arranged all, and implement these technical matters certain degree of difficulty is arranged, and wearing and tearing back user is difficult for repairing.

One of wear-resisting its purpose of Scum Gate Valves of the combined type that the utility model provides is to adopt high-abrasive material to make valve seat runner lining, valve seat doorway sealing surface and flashboard sealing surface, to improve the working life of gate valve.Used high-abrasive material can be according to the operating mode needs, adopt abrasion resistance alloys such as rich chromium cast iron, or adopt wear-resistant ceramic such as pink fused alumina, or adopt wear-resistant plastic and abrasive rubber such as teflon.Prepare these parts, can adopt the whole method made from high-abrasive material, also can adopt the thermal spraying surface engineering technology at the part surface spraying, surfacing, the build-up wear-resistant layer that with low carbon steel are matrix.Adopt the wear-resistant sluice valve of the utility model preparation, the general cast iron gate valve of its service life as compared can improve 3～8 times.

Two of its purpose of the wear-resisting Scum Gate Valves of the combined type that the utility model provides is to make gate valve have good recoverability.The wearing and tearing of gate valve are mainly crossed runner, doorway sealing surface and flashboard sealing surface at valve seat.The combined type gate valve that the utility model provides, its valve seat is made up of three parts: middle valve seat (being fitted with the doorway sealing surface that high-abrasive material is made in it), left flange runner are taken over (being fitted with the lining that high-abrasive material is made in the runner), right flange runner is taken over (being fitted with the lining that high-abrasive material is made in the runner), with bolton together.Flashboard is made up of two-part: flashboard body, flashboard sealing surface (making with high-abrasive material) tighten together with screw.When wearing and tearing take place in long-term use, can open valve body with general purpose tool, the sealing surface on valve seat runner lining, doorway sealing surface and the flashboard of the wearing and tearing of dismantling is changed spare part and can be reused.Both convenient for maintaining had been saved the expense of upgrading gate valve again.

The wear-resisting Scum Gate Valves of combined type that adopts the utility model to make, has wear-resistant, resistance to high temperature, be applicable to that pipelines such as the deslagging, ash disposal, powder feeding of industries such as electric power, metallurgy, building materials, defeated material use, can improve 3-8 times than the operating life of general cast iron gate valve.

Fig. 1 is a gate valve structure erection drawing of the present utility model.Valve seat takes over (3) by middle valve seat (1), left flange runner adapter (2), right flange runner and the runner lining made from high-abrasive material (4) (5), valve seat doorway sealing surface (6) (7) are formed, and is fastened as one by bolt (11) (12) and screw (13) (14).Flashboard is formed by flashboard body (8) with the flashboard sealing surface (9) (10) that high-abrasive material is made, and fastens as one with screw (15) (16).(17) be mud hole screw on the valve seat.Handwheel accessories such as (20) on valve rod (19), the valve gap (18) is identical with general gate valve, is tightened together by bolt (21) and valve seat.

Below in conjunction with accompanying drawing in detail two embodiments of the present utility model are described in detail:

Embodiment one:

The gate valve flow passage components adopt whole high-abrasive material manufacturing.

Fig. 2 is the view of middle valve seat (1), and Fig. 3 is the view that left and right sides flange runner is taken over (2) (3), and Fig. 4 is the view of flashboard body (8), and above part adopts carbon steel material to make.

Fig. 5 is the view of left and right sides runner lining (4) (5), and Fig. 6 is the view of valve seat doorway sealing surface (6) (7), and Fig. 7 is the view of flashboard sealing surface (9) (10), and above part adopts the pink fused alumina stupalith to make.

Above part is assembled into gate valve by Fig. 1 structure, and improve 6-8 doubly than general cast iron gate valve its working life.

Embodiment two:

The gate valve flow passage components adopt thermal spraying surface spraying weld wearing layer technology to make.

Adopt carbon steel material to make middle valve seat (1), left and right sides flange runner adapter (2) (3), flashboard body (8) by Fig. 2, Fig. 3, Fig. 4.

Fig. 8 is the surfacing position view of left and right sides runner lining (4) (5), Fig. 9 is the surfacing position view of valve seat doorway sealing surface (6) (7), Figure 10 is the surfacing position view of flashboard sealing surface (9) (10), P represents the body material of part among the above figure, all adopt the low-carbon steel material manufacturing, adopt thermal spraying (plasma, oxyacetylene) spray welding process to prepare wearing layer K then in the above, wearing layer thickness is 2 millimeters.Spray material is the tungsten carbide of nickel-base alloy.

Above part is assembled into gate valve by Fig. 1 structure, and improve 3-5 doubly than general cast iron gate valve its working life.

Claims

1, a kind of combined type wear-resistant sluice valve that is used to discharge lime-ash and powder medium, it is characterized in that: the overcurrent position of gate valve all is fitted with the part that adopts high-abrasive material to make: left and right sides runner lining (4) (5), valve seat doorway sealing surface (6) (7), flashboard sealing surface (9) (10) are separately fixed on the valve seat and flashboard of three parts composition.Its particular location is: left and right sides runner lining (4) (5) is used bolt (11) (12) to be fixed on left and right sides flange runner respectively and is taken in (2) (3); Valve seat doorway sealing surface (6) (7) uses screw (13) (14) to be fixed on the middle valve seat (1) respectively; Flashboard sealing surface (9) (10) uses screw (15) (16) to be fixed on the flashboard body (8) respectively.

2, according to the wear-resisting Scum Gate Valves of combined type of claim 1, it is characterized in that: runner lining (4) (5), valve seat doorway sealing surface (6) (7), the employed high-abrasive material of flashboard sealing surface (9) (10), can wholely adopt abrasion resistance alloys such as rich chromium cast iron according to the operating mode needs; Also can adopt wear-resistant ceramics such as pink fused alumina; Or adopt wear-resistant plastic and the abrasive rubber manufacturing such as alkene of poly-tetrafluoro.

3, according to the wear-resisting Scum Gate Valves of combined type of claim 1 and claim 2, it is characterized in that: runner lining (4) (5), valve seat doorway sealing surface (6) (7), the employed high-abrasive material of flashboard sealing surface (9) (10), also can adopt the thermal spraying surface engineering technology, be on the part surface of matrix with low carbon steel, abrasion resistance alloys such as spraying (or surfacing, built-up welding) tungsten carbide of nickel-base, rich chromium cast iron: wear-resistant ceramics such as spray coating metal ceramic, poly-tetrafluoro wear-resistant plastic such as alkene prepare wear resistant coating.