CN2791383Y

CN2791383Y - Cut-off valve easy to change seat and clack

Info

Publication number: CN2791383Y
Application number: CN 200420067077
Authority: CN
Inventors: 黄日新
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-06-15
Filing date: 2004-06-15
Publication date: 2006-06-28
Anticipated expiration: 2014-06-15

Abstract

The utility model relates to a cut-off valve with an easily changeable valve seat and a valve clack, which is composed of a valve body, an easily changeable valve seat, an easily changeable valve clack, a valve rod, a valve cap, a handwheel, etc. The utility model is suitable for a high temperature and pressure thermal power plant. The valve largely improves the structure of the valve seat because the original cut-off valve with an easily changeable valve seat and a valve clack has difficulty in disassembling the valve seat, and the valve seat is easy to disassemble and change. The cut-off valve has the advantages of good sealing performance, long service life and anti-wear performance of the original cut-off valve, and also has the advantages of simple processing and low cost.

Description

The stop valve of readily changeable valves seat and flap

1 technical field

The utility model relates to industrial stop valve, particularly easy to wear, the frequent stop valve of changing of needs of the use of High Temperature High Pressure thermal power plant.

2 background techniquies

The present stop valve of a kind of replaceable valve seat that is using and flap (national patent number: ZL01278733.7), the method of dismounting valve seat is: in two eyelets on the special round end fork wrench insertion valve seat disk, moving upper handle dismantles it, because the eyelet on the valve seat is little, little, therefore stressed bad with the surface of contact of spanner circle jaw, be difficult to the dismounting lower valve base, when valve seat and valve body generation corrosion, more be difficult to dismounting.

3 summary of the invention

In order to overcome the shortcoming of the stop valve dismounting valve seat difficulty that has replaceable valve seat and flap now, the utility model provides the stop valve of a kind of readily changeable valves seat and flap, makes the dismounting valve seat more convenient and quick.

The technological scheme that its technical problem that solves the utility model adopts is: change into the valve seat top of the stop valve of former replaceable valve seat and flap square, with the special valve seat spanner that unloads with square plug, insert on this square spigot, because valve seat square spigot and the special surface of contact that unloads the square socket of valve seat spanner strengthen, stressed good when unloading valve seat, therefore be easy to valve seat is unloaded.

The beneficial effects of the utility model are: make the stop valve of former replaceable valve seat and flap be more convenient for dismantling, so just more demonstrate all advantages of the stop valve of replaceable valve seat and flap, that is: energy-conservation, wear-resisting, long-lived and be easy to change wear-out part, in the shortest time, easily the valve seat and the flap of wearing and tearing are changed.

4 description of drawings

The utlity model has following drawing, now be described as follows;

Fig. 1 is the stop valve figure of readily changeable valves seat and flap.

Fig. 2 is valve seat figure.

Fig. 3 is valve seat abrasion resistance alloy grommet figure.

Fig. 4 is the valve seat key plan on the valve body.

Fig. 5 is valve seat gasket ring figure.

Fig. 6 is valve seat insert repelacing tool figure.

5 embodiments

Embodiment of the present utility model is as follows:

(1) is valve body in Fig. 1, (2) be valve seat, (3) be flap, (4) be the abrasion resistance alloy grommet of valve seat, (5) are the fixing bolt of the valve rod of connection flap, and (6) are valve rod, (7) be the valve stem packing gland, (8) be the stuffing box packing of valve rod, (9) are the operation handwheel of valve, and (10) are the valve seat gasket ring.

Valve seat (2) and valve body (1) insert with special square plug spanner (Fig. 6) on the square knuckle on valve seat (2) top with being threaded, and just can easily valve seat be disassembled from valve body (1).For guaranteeing the leakproofness between valve seat and the valve body, valve seat gasket ring (10) has been installed in the joint between valve body and valve seat.For guaranteeing that valve is in operation, valve seat (2) is not easy to wear because of frequently contacting valve seat with flap (3), is inlaid with abrasion resistance alloy grommet (4) on valve seat (2).The valve seat upper design become inner for circular and outside for square, be can the special square plug spanner of socket joint for square spigot, thereby be easy to valve seat is loaded and unloaded; The middle part is designed to disc, is for the usefulness of valve seat (2) with valve body (1) sealing engagement; The bottom is designed to be with outside thread Md ₁, interior warp is the circular cylinder body of a, is the usefulness that is connected with valve body (1) for valve seat (2).The loading and unloading of valve seat are to adopt the special tool (see figure 6), and the square female fitting of instrument is inserted on the square body of valve seat, and the handle on the pulling tool just can easily be packed valve seat into or drawn off valve body.

Easily changeable flap (3) top is cylindrical, has outside thread, and the middle part is a square body, and the bottom is a half sphere shape, and hemisphere is outer to be high temperature resistant, high pressure and the anti-abrasion resistance alloy that washes away, and flap (3) is contained in valve rod (6) bottom with internal thread.The handwheel (9) on rotation valve rod (6) top, the operation that just can finish valve opening and close, because valve seat and flap surface are high-abrasive material and make, so the tool wear-resisting property is good, leakproofness strong, long service life, and is easy to process, cost is low and the advantage that is easy to change.

Claims

1. the stop valve of readily changeable valves seat and flap, mainly form by valve body, valve seat, flap, valve rod, valve gap and handwheel etc., it is characterized in that: the valve seat (2) that is inlaid with abrasion resistance alloy grommet (4), top is square, the middle part is a disc, the bottom is a cylindrical body, and has outside thread, is contained on the valve body (1) with internal thread.

2. the valve seat (2) of the stop valve of readily changeable valves seat according to claim 1 and flap is characterized in that: the valve inside nominal diameter is DN, and valve seat (2) is that a top is square, and the middle part is a disc, and the bottom is circular cylindrical shell, and the external diameter of cylindrical shell is Md ₁, interior warp is a, and the length of side of cylindrical shell top square body is h, and height is g, has a groove for dress abrasion resistance alloy grommet (4) therein, and groove depth is l1, external diameter is b; The disc-shaped bodies at middle part, external diameter is c, and height is d, and the cylindrical body outside of bottom has metric system outside thread Md ₁, the cylindrical shell height is e, being characterized as of valve seat relative dimensions: a=1～1.2DN, b=1.1～1.5a, Md ₁=1.25～1.6a, h=1.25～1.6b, c=1.25～1.5h, e=15～90mm, d=5～30mm, f=e+d.