CN2358298Y

CN2358298Y - Hydraulic angle stop valve

Info

Publication number: CN2358298Y
Application number: CN 99202864
Authority: CN
Inventors: 郑学文; 任希禄
Original assignee: HARBIN ZHONGTONG VALVE PLANT
Current assignee: HARBIN ZHONGTONG VALVE PLANT
Priority date: 1999-02-04
Filing date: 1999-02-04
Publication date: 2000-01-12
Anticipated expiration: 2009-02-04

Abstract

The utility model discloses a hydraulic angle stop valve which comprises a valve body, a valve cover, a valve seat, a valve rod arranged on a valve clack and a connecting flange. The valve clack and the sealing surface of the valve seat are formed by combination and inlay of sealing ring made of high-hardness alloy materials and sealing gaskets which are made of metal materials and form a special shape, and are fixed tightly by screw threads. When the valve is closed, the upper edge of the sealing ring of the valve seat contacts the sealing ring of the valve clack. The structure design of the valve makes the scuffing resistance and high temperature resistance of the sealing surface of the valve improved, the service life is long and the cost is low.

Description

Angle Stop valves surges

The utility model relates to a kind of valve, particularly relates to a kind of Angle Stop valves that surges.

At present, gas plant uses, the Angle Stop valves that is connected with the gas stove gas pipeline, its sealing surface adopts the processing of built-up welding and surfacing more, and material is equivalent to 2cr13,1cr13, hardness is low, antifraying property is poor, owing to flow through in the coal gas medium of valve, contains dust, and the discharged producer gas temperature is up to 350 ℃, pressure is at 4MPa, because the top cone valve easily leaks race oxygen, produces flame at the flap and the contact surface of valve seat easily, the flap and the contact surface of valve seat are scratched, or ablate, and can't close, as the Angle Stop valves of the beastly strange company of Germany production, can only use 7-8 days, must change, and each valve price causes gas valve operating cost height up to 50,000 yuans, because gas stove can not stop production, the replacing valve that is in operation, the workman will at high temperature operate, and is very arduous.

The purpose of this utility model is, for overcoming the deficiency of prior art, provide a kind of antifraying property strong, high temperature resistant, manufacture the low Angle Stop valves of cost.

Following mode can realize the utility model:

Angle Stop valves surges, comprise valve body, valve gap, valve seat, be installed in valve rod and adpting flange on the flap, what flap was a lower diameter less than upper diameter is stepped, stud with the flap seal ring of flap sealing gasket and high hardness successively at the ladder top, the flap nut that is fastened on the outside thread of flap lower end holds out against the flap seal ring from the below, the valve seat insert of high hardness is set in the recess of valve seat, be fastened on the valve seat nut on the valve seat, hold out against valve seat insert from the below, when valve closing, the upper limb of valve seat insert contacts with the flap seal ring.

Between valve seat insert and valve seat nut, also stud with sealing gasket.

The utility model adopts Hardmetal materials to do flap seal ring and valve seat insert, the surface of contact of two kinds of materials, seal by metallic gasket, and with the fastening mode of mechanical whorl, solved the fixation problem of sealing edge circle well, made and this valve antifraying property, resistance to high temperature improve greatly, life-span is existing more than 10 times of valve, and price only is 1/5 of an inlet valve.

Fig. 1 is the utility model sectional view.

Fig. 2 is the gasket seal sectional view.

Embodiment:

Valve gap 2 is connected by bolt 15 with valve body 12,

bolt

14,15 vertical mounting flanges 11, horizontal mounting flange 4 is fastenedly connected with valve body 12 and valve gap 2, valve seat 8 is in valve body lower portion, what flap 3 was lower diameter less than upper diameter is stepped, stud with the flap seal ring 6 that flap sealing gasket 5 and high hardness alloy material are made successively at the ladder top, flap seal ring 6 cross sections are right-angled triangle, be fastened on the flap nut 10 on the flap 3 lower end outside threads, on holding out against flap seal ring 6 and the flap 3 equal from the below with flap seal ring 6 lower edges, valve seat insert 7 is set in the recess of valve seat 8, its below also studs with sealing gasket 13, be fastened on the valve seat nut 9 on the valve seat 8, from below top tight sealing pad 13, make when valve closing, the upper limb of valve seat insert 7 contacts with flap seal ring 6, there is projection on flap sealing gasket 5 and sealing gasket 13 surfaces, can adopt treated metal to manufacture, nut 9, tamp with built-up welding in 10 gaps that stay after fastening, then that built-up welding front end car is flat, air tight during this valve closing, after the unlatching, work as high temperature, high pressure is when the coal gas that contains dust flows through valve, valve sealing face can not be scratched or ablate, and improve working life greatly.

Claims

1, a kind of Angle Stop valves that surges, comprise valve body (12), valve gap (2), valve seat (8), be installed in valve rod (1) and adpting flange (4) on the flap, (11), it is characterized in that: what flap (3) was a lower diameter less than upper diameter is stepped, stud with the flap seal ring (6) of flap sealing gasket (5) and high hardness successively at the ladder top, the flap nut (10) that is fastened on the outside thread of flap (1) lower end holds out against flap seal ring (6) from the below, the valve seat insert of high hardness (7) is set in the recess of valve seat (8), be fastened on the valve seat nut (9) on the valve seat (8), hold out against valve seat insert (7) from the below, when valve closing, the upper limb of valve seat insert (7) contacts with flap seal ring (6).

2, stop valve according to claim 1 is characterized in that: also stud with sealing gasket (13) between valve seat insert (7) and valve seat nut (9).

3, stop valve according to claim 1 is characterized in that: there is projection on flap sealing gasket (5) and sealing gasket (13) surface.

4, stop valve according to claim 1 is characterized in that: on Stem Mut (10) holds out against flap seal ring (6) and the flap (3) equal with flap seal ring (6) lower edge from the below.