CN2400646Y

CN2400646Y - Pin-free flexible packing butterfly valve for pipe ends

Info

Publication number: CN2400646Y
Application number: CN 99258183
Authority: CN
Inventors: 李桂兰; 于洪艳; 孙建岭; 张秀娟
Original assignee: TIANJIN TANGGU TWT VALVE Co Ltd
Current assignee: TIANJIN TANGGU TWT VALVE Co Ltd
Priority date: 1999-12-30
Filing date: 1999-12-30
Publication date: 2000-10-11
Anticipated expiration: 2009-12-30

Abstract

The utility model relates to a soft sealing butterfly valve without pins, which is used in pipe ends. The utility model is characterized in that one lateral end of an inner cavity of a valve body is provided with a dovetail slot; the periphery of a valve seat with a framework is provided with an annular wedge-shaped bulge inside the annular dovetail slot which can be embedded in the inner cavity of the valve body; the contact annular surfaces of the valve seat and an upper and a lower rotary shafts are made into wave-shaped surfaces. The utility model has the advantages that when both ends of the valve are oppositely clamped, the limitation of pipelines for the both ends of the valve can be realized; the shortage for excessively floating the valve seat existing in publicly known technology can be effectively solved. In addition, the utility model has the advantages of low manufacture cost, antirust performance, good intensity, and high safety factors.

Description

A kind ofly be used for the soft sealing butterfly valve that pipe end does not have pin

The utility model belongs to F16K valve class technology, particularly relates to a kind of soft sealing butterfly valve that pipe end does not have pin that is used for.

In known technology, the valve that is used for the pipeline end, because this body structure is limit, valve only at one end is connected with pipeline, can not accomplish spacing to the valve two ends of when pressing from both sides pipeline like this, in order to accomplish this point, therefore need take measures the valve seat in the valve is limited, in order to avoid make valve seat excessively unsteady, the measure of generally taking at present is to adopt the mode of valve body and valve seat sidewall preparation screw thread, promptly install long, each cover of short jackscrew, though can play positioning action, still also have deficiency, make valve inner increase the chance that contacts with the external world, so easily get rusty and intensity difference, in addition, this body structure increases part again, the also corresponding raising of manufacture cost.

The purpose of this utility model is to overcome the deficiency in the known technology and provides a kind of antirust and intensity to reach the no pin soft sealing butterfly valve that is used for pipe end of low cost of manufacture well.

The utility model purpose is achieved in that

The utility model is by install rotating shaft by axle sleeve in valve body, at the upper end-hole place of valve body dust ring is housed by last rotating shaft, pass the last rotating shaft flat connection in upper end of valve body upper end and be fixedly connected with transmission device with valve body, square wedge-like is made in the lower end that is installed on the last rotating shaft in the valve body, the rotating shaft lower end is installed on it and has the valve plate of square groove in valve body, the square groove of the square wedge wedge joint on valve plate of last rotating shaft lower end, in valve body, also be coated with lower rotary shaft with the other end Spielpassung of valve plate, on passing through respectively on the valve body, lower rotary shaft is coated with the Elastic Circular taper pin, contact with valve body at lower rotary shaft on the ring surface of combination and have circular groove, " O " seal ring is housed in its groove, on body cavity passes through, on the basis that lower rotary shaft installation valve seat is formed is to realize the purpose of this utility model like this, it is last to be that body cavity passes through, the linkage structure feature that lower rotary shaft is installed valve seat is, side at body cavity is shaped on the ring-type dovetail groove, the ring-type wedge shape projection in the valve seat periphery that has skeleton is shaped on the ring-type dovetail groove that can embed body cavity; Valve seat is made wavy with the ring surface that contacts of upper and lower rotating shaft.

The utility model has following accompanying drawing:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the structure for amplifying schematic representation of I among Fig. 1;

Fig. 3 is an A-A generalized section among Fig. 1;

Fig. 4 is the structure for amplifying schematic representation of II among Fig. 1.

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail:

With reference to Fig. 1, will go up rotating shaft 6 and be loaded in the valve body 1 by axle sleeve 7,9, its axle sleeve plays the radial location effect of rotating shaft.Dust ring 10 is installed in rotating shaft on the upper end-hole place of valve body passes through, pass the valve body upper end on the flat slewing gear that installs with valve body that is connected and installed with in rotating shaft 11 places.With reference to Fig. 4, square wedge-like 14 is made in the lower end of above-mentioned last rotating shaft, valve plate 5 is housed in valve body by last rotating shaft lower end, for the square tenon of last rotating shaft, above valve plate, have corresponding square groove 15, therefore realized that last rotating shaft drive valve plate need not the purpose of taper pin.Lower rotary shaft 4 also is housed in valve body, and the upper end of lower rotary shaft and the other end of above-mentioned valve plate are Spielpassung, and valve plate is free to rotate.For making the valve body axially locating, on valve body, be coated with Elastic Circular taper pin 8 by upper and lower rotating shaft respectively.In addition, contact with valve body at lower rotary shaft on the ring surface of combination and have circular groove 18, place " O " seal ring 2 in its groove, another plays sealing and dustproof effect.With reference to Fig. 2 and Fig. 3, body cavity one side is made ring change shape dovetail groove 13, at body cavity the valve seat 3 that has skeleton 17 is installed by upper and lower rotating shaft transition fit, make ring-type wedge shape projection 12 at the periphery of this valve seat, this wedge shape projection just in time embeds in the ring-type dovetail groove of body cavity, has realized being installed in the positioning action of the utility model valve seat of pipeline end.For further improving safety coefficient of the present utility model and seal action, again valve seat is made wavy 16 with the ring surface that contacts of upper and lower rotating shaft.

Advantage and the good effect that the utlity model has are: owing to valve body and valve seat in the utility model Therefore organically combination when the utility model is connected with the pipeline end, can realize pipeline when pressing from both sides Spacing to the valve two ends effectively solved to exist in the known technology valve seat excessively floated not Foot. In addition, low cost of manufacture own also has antirust and intensity reaches well the high advantage of safety coefficient.

Claims

1. one kind is used for the soft sealing butterfly valve that pipe end does not have pin, be by in valve body, installing rotating shaft by axle sleeve, at the upper end-hole place of valve body dust ring is housed by last rotating shaft, pass the last rotating shaft flat connection in upper end of valve body upper end and be fixedly connected with transmission device with valve body, square wedge-like is made in the lower end that is installed on the last rotating shaft in the valve body, the rotating shaft lower end is installed on it and has the valve plate of square groove in valve body, the square groove of the square wedge wedge joint on valve plate of last rotating shaft lower end, in valve body, also be coated with lower rotary shaft with the other end Spielpassung of valve plate, on passing through respectively on the valve body, lower rotary shaft is coated with the Elastic Circular taper pin, contact with valve body at lower rotary shaft on the ring surface of combination and have circular groove, " 0 " seal ring is housed in its groove, on body cavity passes through, lower rotary shaft is installed valve seat and is formed, it is characterized in that: body cavity is by last, the concrete linkage structure that lower rotary shaft is installed valve seat is, side at body cavity is shaped on the ring-type dovetail groove, the ring-type wedge shape projection in the valve seat periphery that has skeleton is shaped on the ring-type dovetail groove that can embed body cavity; Valve seat is made wavy with the ring surface that contacts of upper and lower rotating shaft.