CN2572153Y

CN2572153Y - Butterfly-gate combined type valve

Info

Publication number: CN2572153Y
Application number: CN 01270402
Authority: CN
Inventors: 王洪福
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-11-08
Filing date: 2001-11-08
Publication date: 2003-09-10
Anticipated expiration: 2011-11-08

Abstract

The utility model relates to a butterfly-brake combined type valve which is composed of a gate valve, a butterfly valve and a small specification bypass ball valve which are assembled together. The utility model is characterized in that a butterfly plate is arranged near an inlet end of a lengthened valve body, and a brake plate is arranged near an outlet end. The small bypass ball valve is arranged between a pipe segment arranged between the butterfly plate and the brake plate and the outlet end of the valve body. When the butterfly-brake combined type valve is used and the valve is turned off, the butterfly plate can be turned off first, and then the brake plate is turned off according to prescription. When the utility model is opened, the butterfly plate is first turned off, the bypass ball valve is also opened for drawing off medium arranged in an inner cavity of the valve body, and then the brake plate is opened. Thus, in the process of opening and closing the brake plate, no medium erosion or acting force influence exists. The open and close of the valve is laborsaving and quick, the abrasion is reduced, and the service life is doubled extended. The utility model can be popularized and applied in a large caliber, a middle, a high and an ultra-high pressure occasions.

Description

Butterfly-lock combined valve

The utility model relates to a kind of butterfly-lock combined valve, and it can be widely used in the productive life every field and carry various liquid or gas, is specially adapted to heavy caliber, middle and high and ultrahigh pressure occasion.

Butterfly valve and gate valve all are modal valves in production and the sphere of life.The major advantage of dish valve has: open and close (only changeing 90 °) rapidly, fluid resistance is little, and it is time saving and energy saving to operate, and is suitable for often opening and closing operation; Structural principle is simple, and volume is little, light weight, and price is low to be particularly suitable for making large bore valves, and adjusting function is good, is suitable for doing to regulate or throttling is used etc.Its disadvantage is a poor sealing performance.Make mesohigh, particularly bigbore mesohigh butterfly valve difficulty is very big.

The major advantage of gate valve has: opening state, and fluid resistance and pressure that no flashboard causes fall, and sealing surface is subjected to the medium erosion little, applied widely, is used for High Temperature High Pressure and all can.The major defect of gate valve has, can not do the modulating valve throttling to be used, and existing gate valve flashboard will bear the erosion and the active force of medium in opening-closing process, and the active force of medium improves with pressure rating and bore increases.Concerning the forced seal gate valve, when flashboard opens and closes, except that overcoming the medium active force, also to overcome the forced draught that valve rod imposes on flashboard.The process that overcomes these two power is all touched correlated parts accelerated wear tests such as making flap, valve seat and screw pair on the one hand, has increased the difficulty of flashboard opening and closing on the other hand again.This has become the biggest problem of design and use heavy caliber, middle and high and Super high pressure valve to make heavy caliber, middle and high pressure or Super high pressure valve have to increase quite complicated driving mechanism (as nominal pressure is 4Mpa, and inside nominal diameter is that the Middle pressure valve of 100mm just need select for use power to reach the Electric actuator of 2.2kw).

The utility model purpose provides a kind of chief that can get butterfly valve, mends the shortage of gate valve, good seal performance, and the life-span is long, and it is time saving and energy saving to operate, and can do and end, and can do the multi-functional of throttling again, widely applicable combined valve.

The purpose of this utility model is by at the close entrance point of a lengthening valve body butterfly plate being installed, near outlet end flashboard is installed, and between body cavity butterfly plate and flashboard, install a small-sized bypass ball valve additional with the valve outlet end, and regulation closes flashboard after throttle down should close butterfly plate earlier when using again, should close butterfly plate earlier during unlatching and open the bypass ball valve bleed off open a sluice gate again behind the body cavity medium firm and hard existing.

The utility model is installed butterfly plate at the close entrance point of a valve body, near outlet end flashboard is installed, and is about to former 3 independent valve and is combined to and forms butterfly-lock combination brake switch and proporting in the unified valve body installing a by-pass valve additional with the valve outlet end between body cavity butterfly plate and the flashboard.This valve is closed Shi Yingxian butterfly plate is closed, and then closes flashboard.Also should earlier butterfly plate be closed extremely during unlatching, and open by-pass valve, bleed off after the medium of body cavity, open flashboard again.Press the gate valve structure principle analysis.Flashboard does not all bear the medium active force in opening and closing overall process like this, therefore it is laborsaving flashboard to be opened and closed, rapidly, make reliable (the no medium active force influence of valve seal, flashboard easily is inserted into the reliable sealing position), and making flashboard, the wearing and tearing and the erosion of correlated parts such as valve seat and screw pair cut to bone, and have improved the working life of valve greatly.In addition, also available butterfly plate control flow rate after flashboard is opened is made modulating valve and is used.The utility model is to be formed by three valve combination from structural principle analysis, but because of wherein butterfly valve itself is cheap, and the utility model is lower to the sealing requirements of butterfly valve, and the specification of by-pass valve is much smaller, so the cost that both increase altogether is also limited.And the gate valve of this valve part is because of examining filter medium pressure influence, valve rod and relative bearing, and the specification of driving mechanism etc. can be dwindled significantly or structure can simplify that (change handwheel as gear transmission, motor changes gear transmission, and motor changes small motor etc. greatly.) cost of this part minimizing is considerable.Simplify or electric motor power reduces and causes factors such as operating cost reduces significantly if add because of dynamic structure, then the utility model relative price is lower, and overall economic efficiency is higher.In addition, though will divide for three steps carried out from operating analysis keying of the present utility model, per step is light and fast all, so waste time and energy unlike former gate valve generally.

In sum, the utility model is compared major advantage with existing gate valve to be had: open and close laborsaving rapidly, convenient and reliable, can often open and close operation.Can doublely do modulating valve usefulness, and adjusting function is good.Flap, parts depreciations such as valve seat and screw pair are little, and life of valve is long, and is applied widely, and especially for heavy caliber, middle and high and its price of ultrahigh pressure occasion is low, operating cost is low, and is particularly remarkable etc. benefit.

Closing embodiment below in conjunction with accompanying drawing is described further:

Accompanying drawing 1 is the complete section plan view of expressing butterfly plate and flashboard structure feature

Among the figure: 1 valve body (comprising handwheel, valve gap, Packing seat and Gland etc.), 2 flashboards, 3 butterfly plates,

Accompanying drawing 2 is the complete section plan views of expressing the by-pass valve 26S Proteasome Structure and Function

Among the figure: 4 by-pass valves

As shown in Figure 1: valve body of the present utility model (1) is longer than the valve body of former gate valve, at the close entrance point of lengthening valve body a discoideus butterfly plate (3) is installed, and flashboard (2) is installed in the close outlet end of valve body.And for example shown in Figure 2: that by-pass valve (4) is installed between pipeline section between body cavity butterfly plate and the flashboard and valve outlet end tube section.Valve shown in Figure 1 is in off position, this moment the butterfly plate standard-sized sheet, pressure action of medium can improve sealing reliability greatly in flashboard.During Open valve, should earlier by-pass valve (4) be closed and be opened to butterfly plate (2) and bleed off the medium of body cavity, and then open flashboard, medium gets final product unblocked flowing through, then can be by the control of rotation butterfly plate if need to regulate flow; During throttle down, also should earlier butterfly plate be closed, close flashboard again.In the switch valve process, because of butterfly plate and the by-pass valve no medium in the valve body that works is arranged, the lifting of flashboard is much more laborsaving than former gate valve.

Claims

1, a kind of butterfly-lock combined valve, it is grouped together by a gate valve, a butterfly valve and a small dimension bypass ball valve and constitutes, it is characterized in that at the close entrance point of the valve body of a lengthening butterfly being installed pulls, near outlet end lock is installed and is pulled, and between the body cavity butterfly operates a switch, install a small-sized bypass ball valve additional between pipeline section and the valve outlet end.

2,, it is characterized in that the inside nominal diameter of described small-sized by-pass valve should be selected for use in 1/10～1/20 scope of main valve inside nominal diameter according to the described butterfly of claim 1-lock combined valve.