CN2169742Y

CN2169742Y - Butterfly valve

Info

Publication number: CN2169742Y
Application number: CN 93212871
Authority: CN
Inventors: 张培尧
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-06-07
Filing date: 1993-06-07
Publication date: 1994-06-22
Anticipated expiration: 2003-06-07

Abstract

The utility model relates to a mechanical butterfly valve matched with a new bag dust collector, which adopts a square shell body. A rotation axle whose two ends are provided with bearings horizontally passes through the middle portion of the vertical surface of the shell body. The rotation axle is horizontally provided with a valve plate. One end of the rotation axle is connected with an electromagnet by a pull rod and a weight rod. The opening and the closing of the valve plate is conducted by the gravitational effect of the electromagnet and a weight to enable the air current to flow or be cut off.

Description

Butterfly valve

This valve is the machinery valve with the supporting a kind of switch air-flow of novel sack cleaner.

During novel sack cleaner deashing, require butterfly valve to become closed condition,, recover open mode from closed condition again through behind the certain hour from open mode.Generally can adopt the conventional butterfly valve of switch air-flow.But there are the following problems for conventional butterfly valve: 1, air tight in order to guarantee to close, and often adopt garden shape valve body and valve plate, and do not adopt square valve body and valve plate, because precision is difficult to control between square valve body and the valve plate, gas leakage is serious.But the garden of manufacturing shape valve more complicated, the requirement on machining accuracy height; 2, the power of switch butterfly valve can adopt cylinder, oil hydraulic cylinder, electric pushrod, motor and worm and gear device, electromagnet to add Returnning spring etc.Before several power plant more complicated, energy consumption is big, control gear is complexity but also malfunctioning easily not only.It is simpler, energy-conservation than preceding several devices as the power plant of switch butterfly valve that electromagnet adds Returnning spring, adjusts difficulty but exist spring force, in the work, usually makes the butterfly valve can not normal switch again because of spring is tired.

Purpose of design of the present utility model is a shortcoming of attempting to overcome conventional butterfly valve, provides a kind of easy processing, switch power not only simply but also reliable novel butterfly valve.

Structure of the present utility model is provided by following embodiment and accompanying drawing thereof.

Accompanying drawing is the schematic representation according to the butterfly valve that the utility model proposes.

Describe structure of the present utility model and working condition in detail below in conjunction with accompanying drawing.

This butterfly valve comprises a square casing ［ 1 ］, in the middle of the vertical surface of housing, level is passed the rotatingshaft ［ 3 ］ that bearing ［ 2 ］ is installed at a two, rotatingshaft ［ 3 ］ is gone up level a valve plate ［ 4 ］ is installed, one end of rotatingshaft ［ 3 ］ links with electromagnet ［ 7 ］ by movement weight rod ［ 5 ］ and pull bar ［ 6 ］, being equipped with one on the movement weight rod ［ 5 ］ can be along the weight ［ 8 ］ of position adjustable before and after the screw thread on the movement weight rod ［ 5 ］, in the vertical position of the inner valve plate of housing ［ 1 ］［ 4 ］ when closing, before and after respectively burn-on an anti-gas-leak shelves wind half-turn ［ 9 ］, shelves wind half-turns ［ 9 ］ have two, two location iron blocks ［ 10 ］ are welded on the top of the horizontal position when the inner valve plate of housing ［ 1 ］［ 4 ］ is opened.

In electromagnet ［ 7 ］ dead electricity, valve plate ［ 4 ］ is in the horizontal position of unlatching.When electromagnet ［ 7 ］ when electric, rotatingshaft ［ 3 ］ clockwise rotates 90 degree (electromagnet and weight are in the face of the observer), valve plate ［ 4 ］ is in the vertical position of closing.When electromagnet ［ 7 ］ dead electricity, under the action of gravity of weight ［ 8 ］ and electromagnet armature ［ 11 ］, rotatingshaft ［ 3 ］ rotates counterclockwise 90 degree, and valve plate is in the position of unlatching again.Location iron block ［ 10 ］ can guarantee that valve plate ［ 4 ］ is in the position of level.

This valve has following advantage:

1, for good, garden shape requirement on machining accuracy height is made complexity than the garden of employing shape for profile employing rectangle or square, the employing square profiles, and available welded steel plate is processed simpler.

2, adopt the anti-valve plate gas leakage of the half-turn that keeps out the wind, can make square butterfly valve air leakage be not more than garden shape butterfly valve.

3, the switch power plant adopt simple and reliable electromagnet, reset to rely on weight gravity, have cancelled Returnning spring.

4, the employing of location iron block is in when guaranteeing the valve plate unlatching and gives fixed position.

Claims

1, a kind of butterfly valve is made up of housing [1], bearing [2], rotatingshaft [3], valve plate [4], movement weight rod [5], connecting rod [6], electromagnet [7] and weight [8], it is characterized in that:

In the middle of the vertical surface of a, square casing [1], level is passed the rotatingshaft [3] that bearing [2] is installed at a two;

B, rotatingshaft [3] are gone up level a valve plate [4] are installed.

2, valve according to claim 1, feature are that an end of rotatingshaft ［ 3 ］ links to each other with electromagnet ［ 7 ］ with pull bar ［ 6 ］ by movement weight rod ［ 5 ］.

3, according to claim 1,2 described valves, feature be equipped with on the movement weight rod ［ 5 ］ one can be before and after the screw thread on the movement weight rod ［ 5 ］ weight ［ 8 ］ of position adjustable.

4, valve according to claim 1, feature are in housing ［ 1 ］, two location of weldering, the horizontal position top iron block ［ 10 ］ when valve plate ［ 4 ］ is opened.