CN2544147Y

CN2544147Y - Expansion butterfly valve

Info

Publication number: CN2544147Y
Application number: CN 02223898
Authority: CN
Inventors: 何相华; 罗章辉; 张意; 杨成红
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-04-22
Filing date: 2002-04-22
Publication date: 2003-04-09
Anticipated expiration: 2012-04-22

Abstract

An expanded butterfly valve consists of a valve body, an expanded ring, a butterfly plate, a seal ring arranged on the base of the valve, a press plate, a tie-in, a pipe, an outlet valve and an inlet valve and a valve pole, a driving mechanism, a copper sheath, an axletree etc. The expanded ring is arranged in a circle groove of the valve inner. The seal ring of the valve base covers the expanded ring in the circle groove and fixes the ring by bolts on the circle groove in the valve body by the press plates at the two sides. The utility model has the advantage that the seal ring arranged on the valve base does not fall off and is not divided. The valve shutoff has a small moment and the seal is dependable without leak.

Description

Expansion butterfly valve

The utility model relates to a kind of stop valve, further is meant a kind of butterfly valve.

At present, in the delivery line of liquid, gas, extensively adopt butterfly valve, butterfly valve is specially adapted to do bigbore stop valve because volume is little, simple in structure, but existing butterfly valve existence is not closed completely, leaks, closes shortcomings such as valve moment is big, seal ring is fragile, come off.

The purpose of this utility model provides a kind of expansion butterfly valve, and it can overcome the shortcoming of existing butterfly valve, has advantages such as closing tightly reliably, do not leak, close valve moment is little, seal ring does not come off, difficult damage.

Above-mentioned purpose of the present utility model is achieved in that it comprises valve body, pressing plate set screw, expansion loop, butterfly plate, valve seat insert, pressing plate, joint, conduit, inlet valve, outlet valve, valve rod, driving mechanism, copper sheathing, bearing, lining, cover plate etc.Offer a circular groove in the body cavity, expansion loop is placed in the internal layer of circular groove, the expansion loop material is rubber or latex, shape is identical with tube, the expansion loop outside is covered with a valve seat insert again, the both sides of valve seat insert are fixed in the circular groove with the pressing plate set screw by pressing plate, valve seat insert can not come off, damage, material is rubber or barras, in order to gain in strength, wherein can add netted reinforcing rib, pressing plate is one group of arc-like sheet, the arc-like sheet internal diameter is identical with valve block internal diameter, the number of every circle arc-like sheet pressing plate is 3～20, expansion loop is communicated with joint by the aperture on the valve shell, joint is connected with conduit again, inlet valve in parallel and outlet valve on the conduit, butterfly plate is placed in the body cavity and with valve inlet and valve export and separates, the butterfly plate periphery just in time closely contacted with valve seat insert when butterfly plate was in the closed position, butterfly plate is fixed on the valve rod again and can rotates around valve rod, and valve rod is by driving mechanisms control, and driving mechanism can adopt manually, electronic, surge, any form such as pneumatic, the valve rod outside coats copper sheathing in addition, bearing, lining is fixed with cover plate on the valve shell of stem bottom.

Working principle of the present utility model is as follows: when closing valve, earlier forward butterfly plate to closed position, at this moment butterfly plate only slightly contacts with valve seat insert, medium also can leak by the butterfly plate peripheral clearance, close moment and little, after shutting high pressure air or water are charged into expansion loop from inlet valve, expansion loop drives valve seat insert and expands together valve seat insert is closely contacted with butterfly plate, and valve is not by tight closing, leak at this moment.When driving valve, earlier the high-pressure medium in the expansion loop is emitted by outlet valve, butterfly plate is opened again, the valve opening force square is equally very little.Can adopt the high-pressure medium of the medium of external high-pressure medium or valve body place pipe network as for the source that is higher than medium (water or gas), leak, can adopt the accumulator pressurize in order to prevent expansion loop by the pressurized cylinder supercharging.

Owing to adopt such scheme, this valve has closes tightly reliably, does not leak, and pass valve valve opening force square is little, advantages such as seal ring does not come off, difficult damage.

The utility model is described in further detail below in conjunction with accompanying drawing.

Accompanying drawing is the embodiment of a kind of concrete structure of the present utility model.

Expansion butterfly valve of the present utility model comprises valve body 1, pressing plate set screw 2, expansion loop 3, butterfly plate 4, valve seat insert 5, pressing plate 6, joint 7, conduit 8, inlet valve 9, outlet valve 10, valve rod 11, driving mechanism 12, copper sheathing 13, bearing 14, lining 15, cover plate 16 etc.Offer a circular groove in valve body 1 inner chamber, expansion loop 3 is placed in the internal layer of circular groove, the outside of expansion loop 3 is covered with a circle valve seat insert 5 again, the both sides of valve seat insert 5 are fixed in the circular groove by pressing plate set screw 2 with two circle pressing plates 6, expansion loop 3 is communicated with joint 7 by the aperture on the valve shell, joint 7 is connected with conduit 8 again, inlet valve 9 in parallel and outlet valve 10 on the conduit 8.Butterfly plate 4 is placed in valve body 1 inner chamber and with valve inlet 101 and valve export 102 and separates, butterfly plate 4 is fixed on the valve rod 11 again and can rotates around valve rod 11, valve rod 11 is by driving mechanism 12 controls, valve rod 11 outsides coat copper sheathing 13, bearing 14, lining 15, securing cover plate 16 on the shell of the valve body 1 of valve rod 11 bottoms.

Claims

1, a kind of expansion butterfly valve, comprise valve body, pressing plate set screw, expansion loop, butterfly plate, valve seat insert, pressing plate, joint, conduit, inlet valve, outlet valve, valve rod, driving mechanism, copper sheathing, bearing, lining, cover plate etc., it is characterized in that offering in the body cavity ring annular groove, expansion loop is placed in the internal layer of circular groove, the expansion loop outside is covered with a valve seat insert again, and the both sides of valve seat insert are fixed in the circular groove with the pressing plate set screw by pressing plate.

2, expansion butterfly valve according to claim 1 is characterized in that pressing plate is one group of arc-like sheet.

3, want 2 described expansion butterfly valves according to right, it is characterized in that pressing plate has two circles, the number of every circle arc-like sheet is the 3-20 sheet.

4, expansion butterfly valve according to claim 2 is characterized in that the arc-like sheet internal diameter is equal to valve block internal diameter.

5, expansion butterfly valve according to claim 1 is characterized in that expansion loop is communicated with joint by the aperture on the valve body, and joint is communicated with conduit again, inlet valve in parallel and outlet valve on the conduit.

6, expansion butterfly valve according to claim 1 is characterized in that expansion loop adopts rubber to make.

7, expansion butterfly valve according to claim 1 is characterized in that valve seat insert adopts rubber or barras to make.

8, expansion butterfly valve according to claim 1 is characterized in that being added with in the valve seat insert reinforcement net.