CN2505609Y

CN2505609Y - Intake hydraulic butterfly valve for water turbine

Info

Publication number: CN2505609Y
Application number: CN01251789U
Authority: CN
Inventors: 王洪运; 张军仿
Original assignee: Hubei Hongcheng General Machinery Co ltd
Current assignee: Hubei Hongcheng General Machinery Co ltd
Priority date: 2001-09-06
Filing date: 2001-09-06
Publication date: 2002-08-14
Anticipated expiration: 2011-09-06

Abstract

An intake hydraulic butterfly valve for water turbine belonging to the water turbine intake control valve field consists of a valve body, a double flat plate butterfly plate, a driving device, a main sealing pair and a maintenance sealing pair, wherein, the main sealing pair is arranged at an outlet of a valve; the maintenance sealing pair is arranged at an inlet. During normal operation, only the main sealing pair is put into use, and when the operating sealing needs to be maintained, the maintenance sealing pair is put into use without affecting the normal operation of other units. When the butterfly plate is placed, two sealing surfaces both break away. Therefore, the utility model has no friction on sealing part; is small in opening torque and long in life-span; solves the problems that the normal operation of the other units is affected when one unit needs to be maintained, which causes the low utilization ratio of the units, and the prior intake hydraulic butterfly valve for water turbine is poor in sealing effect and large in opening torque; and is widely suitable for the rapid water flow interception of various water turbines.

Description

The hydroturbine water intake hydraulic butterfly valve

A kind of water inlet hydraulic butterfly valve, particularly a kind of hydroturbine water intake hydraulic butterfly valve.

The hydroturbine water intake hydraulic butterfly valve is located on the penstock before the spiral case transition section, and it mainly acts on and is: when High Speed System or water distributor break down, in order to block current fast, prevent that unit from flying anecdote so; When a water delivery house steward supplies water to several units, when wherein a unit need overhaul, in order to block current, so that do not influence the normal operation of other unit.This just requires, and the inlet valve volume is little, in light weight, hoisting capacity is little, operation and maintenance is convenient, water leakage is little.Hydraulic butterfly valve the earliest is to adopt air to enclose the bag sealing, and sealing effect is relatively poor, encloses the erosion that bag is subjected to water for a long time simultaneously, destructible; Again adopt solid seal ring together,, increased unlatching moment though sealing effect makes moderate progress thereafter.In addition, when need have the maintenance seal ring, must stop other unit operation, the unit utilization ratio is reduced.

The purpose of this utility model, be to provide a kind of employing two eccentric, dual metal hard-sealing, in valve water outlet place the primary seal pair is set, the maintenance sealing pair is set, during a unit maintenance in water inlet place, other unit energy proper functioning, and the sealing surface place does not have friction, and unlatching moment is little, the hydroturbine water intake hydraulic butterfly valve of long service life.

The utility model is achieved through the following technical solutions its above-mentioned purpose.

This hydroturbine water intake hydraulic butterfly valve comprises valve body 1, two dull and stereotyped butterfly plates 4, drive unit 12, primary seal secondary 13 and maintenance sealing pair 14, primary seal pair 13 is arranged on water outlet 16 places of valve, maintenance sealing pair 14 is arranged on water intake 15 places of valve, it is characterized in that: a drive unit 12 is equipped with in the outside of valve body 1, link to each other by the two dull and stereotyped butterfly plate 4 in valve shaft 17 and the valve body 1, primary seal pair 13 is by being fixed on the butterfly plate seal ring 3 on two dull and stereotyped butterfly plate 4 outer gardens and being fixed on gland 5 on the water outlet 16 of valve body 1, and is placed on the valve seals 2 between they and valve body 1 inwall, piston packing 7, enclosing bag 6 and 8 constitutes; Maintenance sealing pair 14 is by being fixed on the butterfly plate seal ring 10 on two dull and stereotyped butterfly plate 4 outer gardens and being fixed on gland 11 on the water intake 15 of valve body 1, and the valve seals 9 that is placed between they and valve body 1 inwall constitutes, have air inlet/outlet B and A on the water outlet 16 of valve body 1, have press water on the water intake 15 and import and export C and D.

That the utility model will be further described is as follows below in conjunction with accompanying drawing.

Accompanying drawing 1 is the plan view of hydroturbine water intake hydraulic butterfly valve;

Accompanying drawing 2 is the side view of hydroturbine water intake hydraulic butterfly valve;

Accompanying drawing 3 is the secondary structural representation that drops into of primary seal;

Accompanying drawing 4 is the secondary structural representation of removing of primary seal;

The structural representation that accompanying drawing 5 is removed for the maintenance sealing pair;

The structural representation that accompanying drawing 6 drops into for the maintenance sealing pair;

This hydroturbine water intake hydraulic butterfly valve is the hydraulic butterfly valve that adopts two off-centre, dual metal hard-sealing.Mainly form by valve body 1, two dull and stereotyped butterfly plate 4, primary seal pair 13, maintenance sealing pair 14, drive unit 12 etc.When butterfly valve opened and closed, drive unit 12 drove two dull and stereotyped butterfly plates 4 and rotates in 90 ° of scopes.16 places are provided with primary seal pair 13 at valve outlet, are provided with maintenance sealing pair 14 at water intake 15 places.During proper functioning only primary seal pair 13 come into operation, when working seal need overhaul, for not influencing other unit proper functioning, maintenance sealing pair 14 was devoted oneself to work.When two dull and stereotyped butterfly plates 4 rotated, two sealing surfaces all broke away from, and therefore, the place does not have friction at sealing surface, and unlatching moment is little, long service life.

Primary seal pair 13 is mainly by valve seals 2, butterfly plate seal ring 3, gland 5 with enclose bag 6, piston packing 7, enclose bag 8 etc. and form.The sphere form is adopted in two dull and stereotyped butterfly plate 4 sealings, and valve body 1 seal ring adopts conical surface form, and the two all adopts stainless steel material.Driving force can adopt the preceding hydraulic pressure of air pressure, hydraulic pressure or pipe.When this hydroturbine water intake hydraulic butterfly valve is driven valve, from the air inlet of B mouth, enclose bag 6 inflations, give vent to anger from the A mouth, at this moment, valve seals 2 moves right, and two sealing surfaces are thrown off, and two then dull and stereotyped butterfly plates 4 rotate again; When closing valve, after two dull and stereotyped butterfly plates 4 are rotated in place,, enclose bag 8 inflations, give vent to anger, promote valve seals 2 to left movement from the B mouth from the air inlet of A mouth.Two sealing surfaces are linear sealing.

Maintenance sealing pair 14 is made up of butterfly plate seal ring 10, valve seals 9 and gland 11 etc.The seal ring form is identical with primary seal secondary 13 with material, and driving force adopts the preceding hydraulic pressure of pipe.Its working procedure is: when the maintenance sealing dropped into, press water advanced from the D mouth from the C mouth, and valve seals 9 moves right, and until butterfly plate seal ring 10 contact valve seals 9, under hydraulic action, produced enough linear sealing specific pressures.When maintenance was removed, press water advanced from the C mouth from the D mouth, and valve seals 9 is to left movement, and two sealing surfaces are thrown off fully.

Claims

A kind of hydroturbine water intake hydraulic butterfly valve, it comprises valve body 1, two dull and stereotyped butterfly plates 4, drive unit 12, primary seal secondary 13 and maintenance sealing pair 14, primary seal pair 13 is arranged on water outlet 16 places of valve, maintenance sealing pair 14 is arranged on water intake 15 places of valve, it is characterized in that: a drive unit 12 is equipped with in the outside of valve body 1, link to each other by the two dull and stereotyped butterfly plate 4 in valve shaft 17 and the valve body 1, primary seal pair 13 is by being fixed on the butterfly plate seal ring 3 on two dull and stereotyped butterfly plate 4 outer gardens and being fixed on gland 5 on the water outlet 16 of valve body 1, and is placed on the valve seals 2 between they and valve body 1 inwall, piston packing 7, enclosing bag 6 and 8 constitutes; Maintenance sealing pair 14 is by being fixed on the butterfly plate seal ring 10 on two dull and stereotyped butterfly plate 4 outer gardens and being fixed on gland 11 on the water intake 15 of valve body 1, and the valve seals 9 that is placed between they and valve body 1 inwall constitutes, have air inlet/outlet B and A on the water outlet 16 of valve body 1, have press water on the water intake 15 and import and export C and D.