CN201344296Y

CN201344296Y - Metal hard seal valve

Info

Publication number: CN201344296Y
Application number: CNU2008201709195U
Authority: CN
Inventors: 潘海龙
Original assignee: WENZHOU NAIMITE VALVE CO Ltd
Current assignee: WENZHOU NAIMITE VALVE CO Ltd
Priority date: 2008-12-24
Filing date: 2008-12-24
Publication date: 2009-11-11
Anticipated expiration: 2018-12-24

Abstract

The utility model relates to a valve, in particular to a metal hard seal valve which comprises a valve rod, a valve body, a valve seat and a valve core. The metal hard seal valve is characterized in that alloy powder coatings are deposited on the mutual running-in surfaces of the valve seat and the valve core by a high-velocity flame spraying system for forming the working seal surfaces of the valve. The high-velocity flame spraying system is adopted for obtaining the alloy powder coatings which are taken as the working seal surfaces of the valve, the sprayed surfaces have good flatness, lathe processing is not required, and the seal effect can be obtained only by a grinding process (commonly, grinding reminder ranges from 0.1 to 0.2 mm), so that the production period and the abrasion resistance of the valve are greatly improved, the rigidity of the working seal surfaces of the valve core and the valve seat can reach HV600-700 degrees, the temperature resistance of the valve is greatly improved, the maximum operating temperature can reach 700 DEG C, in addition, the corrosion resistance is also greatly improved. The metal hard seal valve is particularly applicable to the occasions with high temperature, high pressure, high corrosion, crystal grains, dust and easy abrasion.

Description

The metal hard-sealing valve

Technical field

The utility model relates to a kind of valve, particularly a kind of metal hard-sealing valve.

Background technique

The metal hard-sealing valve can be divided into two kinds of pile-up welding hard alloy and surfacing self-fluxing alloys by its sealing surface character, pile-up welding hard alloy normally adopts Si Taili material and Inco nickel as sealing surface (typical as plug with molten metal sill as Sealing), and the surfacing self-fluxing alloy normally adopts nickel-base material as sealing surface (typical as nickel chromium triangle borosilicate material Ni 60 as Sealing).Though pile-up welding hard alloy, surfacing self-fluxing alloy good seal performance adhesive strength height, have good wear-resistingly, anti-dash, high pressure resistant, high temperature resistant, decay resistance, but be confined to welding base metal, some workpiece material can not built-up welding and surfacing, and some industrial and mineral occasion does not allow welding; And the sealing surface out-of-flatness behind built-up welding and the surfacing, machining allowance is big, easily produces pore, sand holes and crackle; Post-production complex process, process-cycle are long, and therefore the time-consuming material that takes has also influenced the manufacture cycle and the usability of valve.

Summary of the invention

The purpose of this utility model provide a kind of have good wear-resistingly, anti-dash, high pressure resistant, high temperature resistant, corrosion-resistant and post-production convenient, the metal hard-sealing valve of economy.

The purpose of this utility model is achieved through the following technical solutions: a kind of metal hard-sealing valve, include valve rod, valve body, valve seat and spool, be characterized in: valve seat and spool mutually the face place HVAF of break-in have alloy powder coating to constitute the working seal face of valve.

Alloy powder coating can adopt Ni60, Stellite 6, Stellite 20 or Incone1625 coating, and the thickness of this coating is preferably 0.3-0.5mm.

The beneficial effects of the utility model are: adopt the working seal face of HVAF alloy powder coating as valve, the surface smoothness of spraying attitude is good, do not need turning processing, only promptly arrive sealing effect with grinding (the general grinding surplus is 0.1-0.2mm), make the manufacture cycle and the abrasion resistance of valve be greatly improved, the hardness of the working seal face of its spool and valve seat can reach the HV600-700 degree, the heatproof degree of valve also improves greatly, its working temperature reaches as high as 700 ℃, its decay resistance also improves greatly in addition, is particularly suitable for high temperature, high pressure, high corrosion, crystal grain, dust and occasion easy to wear.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment ball valve

Fig. 2 is the I place enlarged diagram of Fig. 1

Fig. 3 is the structural representation of the wherein a kind of spheroid in the ball valve

Fig. 4 be Fig. 3 the A-A sectional view

Fig. 5 is the structural representation of the another kind of spheroid in the ball valve

Fig. 6 is the B-B sectional view of Fig. 5

Fig. 7 is the structural representation of another spheroid again in the ball valve

Fig. 8 is the right elevation of Fig. 7

Embodiment

Now in conjunction with the accompanying drawings the utility model is further described:

Fig. 1 is to as can be known shown in Figure 4, embodiment of the present utility model includes valve rod 1, valve body 3, valve seat 31 and spheroid 2 (being spool), HVAF is coated with Ni60, Stellite 6, Stellite 20 or Incone1625 coating 21 on the sphere of spheroid 2, at valve seat 31 surperficial corresponding HVAFs Ni60, Stellite 6, Stellite 20 or the Incone1625 coating 311 that matches with the spheroid sphere arranged, the thickness of Ni60, Stellite6, Stellite 20, Incone1625 coating 21,311 is preferably 0.3-0.5mm.Adopt HVAF (HVOF) Ni60, Stellite 6, Stellite 20, Incone1625 coating working seal face as valve, make the abrasion resistance of valve be greatly improved, the hardness of the working seal face of its spheroid and valve seat can reach the HV600-700 degree, the heatproof degree of valve also improves greatly, its working temperature reaches as high as 700 ℃, pressure bearing is 1.6-100MPA, its decay resistance also improves greatly in addition, is particularly suitable for high temperature, high pressure, the high particle of high burn into (as soda acid, sand-lime and so on) occasion easy to wear.

Fig. 5, Fig. 6 then are the structural representation of the another kind of spheroid in the ball valve, this spheroid 2` only is different with the structure that is connected of club with the difference of the spheroid 2 of aforesaid ball valve, be outer surface HVAF (HVOF) Ni60, Stellite 6, Stellite 20, Incone1625 coating coating 21` equally at spheroid 2`, corresponding HVAF (HVOF) Ni60, Stellite 6, Stellite 20, the Incone1625 coating coating of being provided with on the valve seat.

Fig. 7, Fig. 8 then are the structural representation of another spheroid again in the ball valve, this spheroid 2 " is for hemispheroidal; be in spheroid 2 " be provided with HVAF (HVOF) Ni60, Stellite 6, Stellite 20, the Incone1625 coating 21 of ring-type with the face place of the mutual break-in of valve seat (being the face that spheroid contacts and matches with valve seat during in open and close) ", corresponding HVAF (HVOF) Ni60, Stellite 6, Stellite 20, the Incone1625 coating of being provided with on valve seat.

Except above-mentioned ball valve, no matter be which kind of spheroid, as long as be provided with HVAF (HVOF) Ni60, Stellite 6, Stellite20, Incone1625 coating all within the utility model protection domain in the face place of attrition mutually with spheroid institute at valve seat.

The utility model also is suitable for the valve of other types certainly, such as modulating valve, gate valve, stop valve and some particular usage valves etc.

Claims

1. a metal hard-sealing valve includes valve rod, valve body, valve seat and spool, it is characterized in that: valve seat and spool mutually the face place HVAF of break-in have alloy powder coating to constitute the working seal face of valve.

2. metal hard-sealing valve as claimed in claim 1 is characterized in that: described alloy powder coating is the Ni60 coating.

3. metal hard-sealing valve as claimed in claim 1 is characterized in that: described alloy powder coating is Stellite 6 coatings.

4. metal hard-sealing valve as claimed in claim 1 is characterized in that: described alloy powder coating is Stellite 20 coatings.

5. metal hard-sealing valve as claimed in claim 1 is characterized in that: described alloy powder coating is Inconel 625 coatings.

6. as claim 1 or 2 or 3 or 4 or 5 described metal hard-sealing valves, it is characterized in that: the thickness of described coating is 0.3-0.5mm.