CN2937684Y

CN2937684Y - Locking butterfly valve

Info

Publication number: CN2937684Y
Application number: CN 200620021550
Authority: CN
Inventors: 郭玉臣; 郭玉润
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-08-29
Filing date: 2006-08-29
Publication date: 2007-08-22
Anticipated expiration: 2016-08-29

Abstract

A lock-type butterfly valve, relating to a valve is provided, which is used to resolve the issue that the existing the gasket rings of the soft sealing butterfly valves are easily damaged. The main point of the design rests with: an orbicular rope groove (6-1) is arranged on a gasket ring (6); a steel wire rope (7) is arranged in the orbicular rope groove (6-1) and the steel wire rope (7) is tensioned upwards by a handle (8) so as to realize seal finally; In the process of open/close of valve, a valve plate (2) keeps clear of the gasket ring (6); a slotted hole (12-2) is arranged at a connecting plate (12) which is at the lower part of the handle (8) so as to interlock a rotational valve plate (2) and the steel wire rope (7); the locking and seal can not be achieved when the valve plate (2) regulates the opening of the valve; moreover, the valve plate (2) can not be rotated when the valve is In a locking state. The utility model has the advantages that a tight and reliable seal with a labor-saving operation, and thus can be widely applied in the media distribution system.

Description

The locking butterfly valve

Technical field

The utility model relates to a kind of valve.

Background technique

Butterfly valve has obtained using widely in media feed system, and especially for bigbore pipeline, butterfly valve has more obvious advantage.At present, the metal hard-sealing butterfly valve ubiquity processing difficulties, problem that cost is high; Though and soft sealing butterfly valve has been avoided the problem of processing difficulties, the seal ring of soft sealing butterfly valve is subjected to valve plate extruding friction and very easily damages, and then poorly sealed problem occurs in opening-closing process, causes valve to scrap.

The model utility content

The problem of very easily damaging for the seal ring that solves existing soft sealing butterfly valve, the utility model provides a kind of locking butterfly valve, its seal ring in the process that opens and closes with valve plate without any friction, thereby prolonged its working life, have the advantage of tight reliable, the rapid operation of sealing.A technological scheme of the present utility model is: it comprises valve body 1, pivoted arm 5, seal ring 6, places valve plate 2 in the valve body 1 and the main valve axle 3 of fixedlying connected with the upper and lower end of valve plate 2 respectively and pays valve shaft 4, pivoted arm 5 is fixedly installed on the main valve axle 3 in valve body 1 outside, and seal ring 6 is fixedly installed on the inwall of the valve body 1 relative with valve plate 2 positions; It also comprises wire rope 7, handle 8, rope sheave 10, bearing support 11, connecting plate 12 and handle shaft 13, valve body 1 housing of described pivoted arm 5 belows is provided with adpting flange 1-1, connecting plate 12 is fixedlyed connected with the adpting flange 1-1 on valve body 1 housing, and handle 8 is fixedlyed connected with handle shaft 13 and handle shaft 13 is rotationally connected with pivoted arm 5; One end of handle shaft 13 is projection 13-1, have slotted hole 12-2 on the connecting plate 12 of handle 8 belows, offer the groove 10-1 that the shape and size with projection 13-1 match on the end face of described rope sheave 10 1 sides, the projection 13-1 of handle shaft 13 1 ends places in the groove 10-1 of rope sheave 10 1 sides, bearing support 11 is fixed on the connecting plate 12 of opposite side of described rope sheave 10, and the wheel shaft of the opposite side of described rope sheave 10 and bearing support 11 are rotationally connected; The interior edge of seal ring 6 is that the cross section is to offer ring-type grooving 6-1 on the outer surface in the primary seal tongue 6-4 of V font and the primary seal tongue 6-4 outside, offer through hole 12-1 on the connecting plate 12 of described rope sheave 10 belows, offer fall line through hole 1-2 on the valve body 1 of described rope sheave 10 belows, the direction of axis line of described fall line through hole 1-2 is the tangent direction along ring-type grooving 6-1; An end of wire rope 7 is fixedlyed connected with rope sheave 10, No. two ends of wire rope 7 pass the top of the through hole 12-1 fall line through hole 1-2 on the connecting plate, be wrapped in the ring-type grooving 6-1 on the seal ring 6, and fixedly connected with valve body 1 in the bottom of passing the fall line through hole 1-2 on the valve body 1.Working principle: in use, finish the keying of valve by rotating pivoted arm 5, in this opening-closing process, place the wire rope 7 of the ring-type grooving 6-1 of seal ring 6 to be in relaxation state, seal ring 6 also is in relaxation state, the surperficial 2-1 in outer of primary seal tongue 6-4 and valve plate 2 of seal ring 6 contacted (but not interference) or micro-gap was arranged this moment, therefore, valve plate 2 in rotation process with seal ring 6 without any friction.When valve plate 2 goes to the described position of Fig. 1, also do not form sealing between valve plate 2 and the seal ring 6, the projection 13-1 of handle shaft 13 1 ends places in the groove 10-1 of rope sheave 10 1 sides, upwards lift handle 8 this moment, the upwards tension of an end of wire rope 7, the interior wire rope 7 of ring-type grooving 6-1 that is wrapped in seal ring 6 inwardly shrinks, and then the primary seal tongue 6-4 of drive seal ring 6 also inwardly shrinks and compress the surface, outer of valve plate 2, when reaching certain seal pressure, just formed tight sealing; In addition, the slotted hole 12-2 that the connecting plate 12 of handle described in the utility model 8 belows is offered makes when valve plate 2 is in closed condition, could upwards pull handle 8, realizes sealing by wire rope 7 compressing seal rings 6.The beneficial effect of the technical program is:

rotational valve plate

2 and 7 these two actions of Locking Steel Wire rope have realized interlocking, can effectively avoid owing to there is the support of valve plate 2 phenomenon that seal ring 6 damages by pressure not being taken place; Simultaneously, also avoided when valve plate 2 is in closed condition and wire rope 7 and is in locking state, rotated pivoted arm 5 by force and seal ring 6 abrasive phenomenons are taken place; In the opening-closing process of valve, seal ring 6 is to be in the state that loosens, therefore, in the rotation process between valve plate 2 and the seal ring 6 without any friction, thereby prolonged its working life, have that sealing is tight reliable, the advantage of rapid operation.

The difference of another technological scheme of the present utility model and technique scheme is: it has increased upper saw pulley 9, described upper saw pulley 9 is arranged on the valve body 1 of fall line through hole 1-2 below and with valve body 1 and is rotationally connected, an end of described wire rope 7 is fixedlyed connected with rope sheave 10, No. two ends of wire rope 7 pass the top of the through hole 12-1 fall line through hole 1-2 on the connecting plate, be wrapped in the ring-type grooving 6-1 on the seal ring 6, pass the bottom of the fall line through hole 1-2 on the valve body 1 and walk around with an end of wire rope 7 and fixedly connected from the bottom of upper saw pulley 9.The beneficial effect of this scheme is: when valve plate 2 goes to the described position of Fig. 1, upwards lift handle 8, No. one of wire rope 7 end and No. two ends are upwards strained simultaneously, and wire rope 7 tightens up simultaneously from both direction, make the seal ring 6 of whole circle evenly inwardly shrink, sealing is tight more, reliable.

Description of drawings

Fig. 1 is a plan view of the present utility model, and Fig. 2 is the left view of Fig. 1, and Fig. 3 is the plan view of Fig. 1, and Fig. 4 is the B-B sectional view of Fig. 3, and Fig. 5 is the A-A sectional view of Fig. 3, and Fig. 6 is the structural representation of embodiment four.

Embodiment

Embodiment one: (referring to the present embodiment of Fig. 1-Fig. 4) by valve body 1, pivoted arm 5, seal ring 6, place the valve plate 2 in the valve body 1, respectively with valve plate 2 on, the main valve axle 3 that the lower end is fixedly connected, pay valve shaft 4, wire rope 7, handle 8, rope sheave 10, bearing support 11, connecting plate 12 and handle shaft 13 are formed, pivoted arm 5 is fixedly installed on the main valve axle 3 in valve body 1 outside, seal ring 6 is fixedly installed on the inwall of the valve body 1 relative with valve plate 2 positions, valve body 1 housing of described pivoted arm 5 belows is provided with adpting flange 1-1, connecting plate 12 is fixedlyed connected with the adpting flange 1-1 on valve body 1 housing, and handle 8 is fixedlyed connected with handle shaft 13 and handle shaft 13 is rotationally connected with pivoted arm 5; One end of handle shaft 13 is projection 13-1, have slotted hole 12-2 on the connecting plate 12 of handle 8 belows, offer the groove 10-1 that the shape and size with projection 13-1 match on the end face of described rope sheave 10 1 sides, the projection 13-1 of handle shaft 13 1 ends places in the groove 10-1 of rope sheave 10 1 sides, bearing support 11 is fixed on the connecting plate 12 of a side of described rope sheave 10, and wheel shaft and bearing support 11 on the opposite side end face of described rope sheave 10 are rotationally connected; The interior edge of seal ring 6 is that the cross section is to offer ring-type grooving 6-1 on the outer surface in the primary seal tongue 6-4 of V font and the primary seal tongue 6-4 outside, offer through hole 12-1 on the connecting plate 12 of described rope sheave 10 belows, offer fall line through hole 1-2 on the valve body 1 of described rope sheave 10 belows, the direction of axis line of described fall line through hole 1-2 is the tangent direction along ring-type grooving 6-1; An end of wire rope 7 is fixedlyed connected with rope sheave 10, No. two ends of wire rope 7 pass the top of the through hole 12-1 fall line through hole 1-2 on the connecting plate, be wrapped in the ring-type grooving 6-1 on the seal ring 6, and fixedly connected with valve body 1 in the bottom of passing the fall line through hole 1-2 on the valve body 1.

Embodiment two: (referring to the present embodiment of Fig. 1-Fig. 3) by valve body 1, pivoted arm 5, seal ring 6, place the valve plate 2 in the valve body 1, respectively with valve plate 2 on, main valve axle 3 that the lower end is fixedly connected and pair valve shaft 4, wire rope 7, handle 8, upper saw pulley 9, rope sheave 10, bearing support 11, connecting plate 12 and handle shaft 13 are formed, pivoted arm 5 is fixedly installed on the main valve axle 3 in valve body 1 outside, seal ring 6 is fixedly installed on the inwall of the valve body 1 relative with valve plate 2 positions, valve body 1 housing of described pivoted arm 5 belows is provided with adpting flange 1-1, connecting plate 12 is fixedlyed connected with the adpting flange 1-1 on valve body 1 housing, and handle 8 is fixedlyed connected with handle shaft 13 and handle shaft 13 is rotationally connected with pivoted arm 5; One end of handle shaft 13 is projection 13-1, has slotted hole 12-2 on the connecting plate 12 of handle 8 belows; Offer the groove 10-1 that the shape and size with projection 13-1 match on the end face of described rope sheave 10 1 sides, the projection 13-1 of handle shaft 13 1 ends places in the groove 10-1 of rope sheave 10 1 sides, bearing support 11 is fixed on the connecting plate 12 of described rope sheave 10 opposite sides, and wheel shaft and bearing support 11 on the opposite side end face of described rope sheave 10 are rotationally connected; The interior edge of seal ring 6 is that the cross section is to offer ring-type grooving 6-1 on the outer surface in the primary seal tongue 6-4 of V font and the primary seal tongue 6-4 outside, offer through hole 12-1 on the connecting plate 12 of described rope sheave 10 belows, offer fall line through hole 1-2 on the valve body 1 of described rope sheave 10 belows, the direction of axis line of described fall line through hole 1-2 is the tangent direction along ring-type grooving 6-1; Described upper saw pulley 9 is arranged on the valve body 1 of fall line through hole 1-2 below and with valve body 1 and is rotationally connected; An end of wire rope 7 is fixedlyed connected with rope sheave 10, No. two ends of wire rope 7 pass the top of the through hole 12-1 fall line through hole 1-2 on the connecting plate, be wrapped in the ring-type grooving 6-1 on the seal ring 6, pass the bottom of the fall line through hole 1-2 on the valve body 1 and walk around with an end of wire rope 7 and fixedly connected from the bottom of upper saw pulley 9.

Embodiment three: (referring to Fig. 1, Fig. 6) present embodiment and embodiment one or twos' difference is that it also comprises left pressing plate 19, right pressing plate 14, several fastening screw trip bolts 15, several fastening screw trip bolt seats 16 and wear ring 18, and the inwall of described valve body 1 is provided with ring-type swallow-tail form boss 1-3; The both sides of described seal ring 6 external diameters are respectively equipped with the first seal boss 6-2 and the second seal boss 6-3, the first annular boss 6-2 on the seal ring 6 and the second annular boss 6-3 are separately positioned on the both sides of the ring-type swallow-tail form boss 1-3 on the valve body 1, left pressing plate 19 and right pressing plate 14 are ring-type and are separately positioned on the both sides of seal ring 6, several fastening screw trip bolt seats 16 are separately positioned on the inwall of valve body 1 on left pressing plate 19 left sides and right pressing plate 14 right sides, and several fastening screw trip bolts 15 are threaded with several fastening screw trip bolt seats 16 respectively and fastening left pressing plate 19 and right pressing plate 14 respectively; Described wear ring 18 is arranged on the bottom land of ring-type grooving 6-1 on the seal ring 6.Other composition is identical with embodiment one or two with annexation.The described seal ring of present embodiment 6 is installed on the ring-type swallow-tail form boss 1-3 on valve body 1 inwall by the first seal boss 6-2 of its both sides and the second seal boss 6-3, left pressing plate 19 and right pressing plate 14 are pressed in respectively on the end face of the first annular boss 6-2 of seal ring 6 both sides and the second annular boss 6-3, and respectively left pressing plate 19 and right pressing plate 14 are fixed by several fastening screw trip bolts 15, form reliable sealing, guarantee that further the medium in the valve body can not be through leaking herein; The wear ring 18 that present embodiment is set up can alleviate the wire rope 8 repeatable operation seal ring 6 that directly weares and teares, to prolong its working life.

Embodiment four: (referring to Fig. 1, Fig. 6) present embodiment and embodiment one, two or threes' difference is that surface, the outer 2-1 of described valve plate 2 is sphere or stepped cylndrical surface.Other composition is identical with embodiment one, two or three with annexation.Surface, the described outer of present embodiment 2-1 is that the advantage of sphere is that wire rope 7 one tightens up slightly, can form sealing, and surface, described outer 2-1 is stepped cylndrical surface, can avoid the relative slippage of generation between seal ring 6 and the valve plate 2.

Embodiment five: (referring to Fig. 1, Fig. 6) present embodiment is that with embodiment one, two, three or four difference described left pressing plate 19 and the opposing side of the primary seal tongue 6-4 of seal ring 6 are inclined-plane 19-1 and oblique consistent with the inclined-plane, left side of primary seal tongue 6-4; Opposing side with the primary seal tongue 6-4 of seal ring 6 on the described right pressing plate 14 is No. two inclined-plane 14-1 and oblique consistent with the inclined-plane, right side of primary seal tongue 6-4.Other composition is identical with embodiment one, two, three or four with annexation.The advantage of present embodiment be left pressing plate 19 with right pressing plate 14 on primary seal tongue 6-4 relative inclined-plane respectively, when wire rope 8 locking states, left pressing plate 19 can stop primary seal tongue 6-4 to be moved to the left under the effect of right side pressure medium, and right pressing plate 14 can stop primary seal tongue 6-4 to move right under the effect of left side pressure medium.

Embodiment six: the difference of (referring to Fig. 2, Fig. 4, Fig. 5) present embodiment and embodiment two is that it also comprises euphroe 17, offer radial hole 10-2 on the described rope sheave 10, the outer round surface that No. one of described wire rope 7 end passes radial hole 10-2 and walks around rope sheave 10 is fixedlyed connected with rising to the bait of euphroe 17, and the following hook of euphroe 17 is fixedlyed connected with No. two ends of wire rope 7.Other composition is identical with embodiment two with annexation.Present embodiment can be adjusted the elasticity of wire rope 8 in use, to adapt to different needs.

Embodiment seven: (referring to Fig. 6) present embodiment and embodiment one or twos' difference is that it also comprises No. two left pressing plates 20 and No. two right pressing plates 21 and several screws 22, described No. two left pressing plates 20 and No. two right pressing plates 21 are ring-type, the right side of No. two left pressing plates 20 is provided with right belling platform 20-1, the left side of No. two right pressing plates 21 is provided with left belling platform 21-1, opposite position with a boss 6-5 and No. two boss 6-6 on the inwall of valve body 1 has a groove 1-4 and No. two groove 1-5, and boss 6-5 and No. two boss 6-6 place respectively in groove 1-4 and No. two groove 1-5; The left belling platform 21-1 of the right belling platform 20-1 of described No. two left pressing plates 20 and No. two right pressing plates 21 is pressed in respectively on the first annular boss 6-2 and the second annular boss 6-3 on the seal ring 6, and described No. two left pressing plates 20 and No. two right pressing plates 21 are fastened on the inwall of valve body 1 by several screws 22 respectively; Be respectively arranged with a boss 6-5 and No. two boss 6-6 on the described seal ring 6 on the external cylindrical surface of the ring-type grooving 6-1 left and right sides.Other composition is identical with embodiment one or two with annexation.The left and right pressure plate structure that present embodiment adopted plays supporting effect more reliably to the inner ring of seal ring 6; Guaranteed that seal ring 6 does not break away from from valve body 2, simultaneously, primary seal tongue 6-4 resets rapidly when having guaranteed deblocking again, guarantees that valve plate 2 is not subjected to jam when opening.

Claims

1, the locking butterfly valve, it comprises valve body (1), pivoted arm (5), seal ring (6), place in the valve body (1) valve plate (2) and respectively with valve plate (2) on, main valve axle (3) that the lower end is fixedly connected and pair valve shaft (4), pivoted arm (5) is fixedly installed on the main valve axle (3) in valve body (1) outside, seal ring (6) is fixedly installed on the inwall of the valve body (1) relative with valve plate (2) position, it is characterized in that it also comprises wire rope (7), handle (8), rope sheave (10), bearing support (11), connecting plate (12) and handle shaft (13), valve body (1) housing of described pivoted arm (5) below is provided with adpting flange (1-1), connecting plate (12) is fixedlyed connected with the adpting flange (1-1) on valve body (1) housing, and handle (8) is fixedlyed connected with handle shaft (13) and handle shaft (13) is rotationally connected with pivoted arm (5); One end of handle shaft (13) is projection (13-1), have slotted hole (12-2) on the connecting plate (12) of handle (8) below, offer the groove (10-1) that the shape and size with projection (13-1) match on the end face of described rope sheave (10) one sides, the projection (13-1) of handle shaft (13) one ends places in the groove (10-1) of rope sheave (10) one sides, bearing support (11) is fixed on the connecting plate (12) of described rope sheave (10) opposite side, and wheel shaft on the opposite side end face of described rope sheave (10) and bearing support (11) are rotationally connected; The interior edge of seal ring (6) is that the cross section is to offer ring-type grooving (6-1) on the outer surface in the primary seal tongue (6-4) of V font and primary seal tongue (6-4) outside, offer through hole (12-1) on the connecting plate (12) of described rope sheave (10) below, offer fall line through hole (1-2) on the valve body (1) of described rope sheave (10) below, the direction of axis line of described fall line through hole (1-2) is the tangent direction along ring-type grooving (6-1); An end of wire rope (7) is fixedlyed connected with rope sheave (10), No. two ends of wire rope (7) pass the top of through hole (12-1) the fall line through hole (1-2) on the connecting plate, be wrapped in the ring-type grooving (6-1) on the seal ring (6), and fixedly connected with valve body (1) in the bottom of passing the fall line through hole (1-2) on the valve body (1).

2, locking butterfly valve according to claim 1, it is characterized in that it also comprises left pressing plate (19), right pressing plate (14), several fastening screw trip bolts (15) and several fastening screw trip bolt seats (16) and wear ring (18), the inwall of described valve body (1) is provided with ring-type swallow-tail form boss (1-3); The both sides of described seal ring (6) external diameter are respectively equipped with first seal boss (6-2) and second seal boss (6-3), first annular boss (6-2) on the seal ring (6) and second annular boss (6-3) are separately positioned on the both sides of the ring-type swallow-tail form boss (1-3) on the valve body (1), left pressing plate (19) and right pressing plate (14) are ring-type and are separately positioned on the both sides of seal ring (6), several fastening screw trip bolt seats (16) are separately positioned on the left of the left pressing plate (19) and on the inwall of the valve body (1) on right pressing plate (14) right side, several fastening screw trip bolts (15) are threaded with several fastening screw trip bolt seats (16) respectively and difference fastening left pressing plate (19) and right pressing plate (14); Described wear ring (18) is arranged on the bottom land that seal ring (6) is gone up ring-type grooving (6-1).

3, locking butterfly valve according to claim 1, the surface, outer (2-1) that it is characterized in that described valve plate (2) is sphere or stepped cylndrical surface.

4, locking butterfly valve according to claim 2 is characterized in that described left pressing plate (19) is an inclined-plane (19-1) and oblique consistent with the inclined-plane, left side of primary seal tongue (6-4) with the opposing side of the primary seal tongue (6-4) of seal ring (6); The opposing side that described right pressing plate (14) is gone up with the primary seal tongue (6-4) of seal ring (6) is No. two inclined-planes (14-1) and oblique consistent with the inclined-plane, right side of primary seal tongue (6-4).

5, locking butterfly valve according to claim 1, it is characterized in that it also comprises No. two left pressing plates (20) and No. two right pressing plates (21) and several screws (22), described No. two left pressing plates (20) and No. two right pressing plates (21) are ring-type, the right side of No. two left pressing plates (20) is provided with right belling platform (20-1), the left side of No. two right pressing plates (21) is provided with left belling platform (21-1), opposite position with a boss (6-5) and No. two boss (6-6) on the inwall of valve body (1) has a groove (1-4) and No. two grooves (1-5), and a boss (6-5) and No. two boss (6-6) place respectively in a groove (1-4) and No. two grooves (1-5); The right belling platform (20-1) of described No. two left pressing plates (20) and the left belling platform (21-1) of No. two right pressing plates (21) are pressed in respectively on first annular boss (6-2) and second annular boss (6-3) on the seal ring (6), and described No. two left pressing plates (20) and No. two right pressing plates (21) are fastened on the inwall of valve body (1) by several screws (22) respectively; Be respectively arranged with a boss (6-5) and No. two boss (6-6) on the external cylindrical surface of last ring-type grooving (6-1) left and right sides of described seal ring (6).

6, the locking butterfly valve, it comprises valve body (1), pivoted arm (5), seal ring (6), place in the valve body (1) valve plate (2) and respectively with valve plate (2) on, main valve axle (3) that the lower end is fixedly connected and pair valve shaft (4), pivoted arm (5) is fixedly installed on the main valve axle (3) in valve body (1) outside, seal ring (6) is fixedly installed on the inwall of the valve body (1) relative with valve plate (2) position, it is characterized in that it also comprises wire rope (7), handle (8), upper saw pulley (9), rope sheave (10), bearing support (11), connecting plate (12) and handle shaft (13), valve body (1) housing of described pivoted arm (5) below is provided with adpting flange (1-1), connecting plate (12) is fixedlyed connected with the adpting flange (1-1) on valve body (1) housing, and handle (8) is fixedlyed connected with handle shaft (13) and handle shaft (13) is rotationally connected with pivoted arm (5); One end of handle shaft (13) is projection (13-1), has slotted hole (12-2) on the connecting plate (12) of handle (8) below; Offer the groove (10-1) that the shape and size with projection (13-1) match on the end face of described rope sheave (10) one sides, the projection (13-1) of handle shaft (13) one ends places in the groove (10-1) of rope sheave (10) one sides, bearing support (11) is fixed on the connecting plate (12) of a side of described rope sheave (10), and wheel shaft on the opposite side end face of described rope sheave (10) and bearing support (11) are rotationally connected; The interior edge of seal ring (6) is that the cross section is to offer ring-type grooving (6-1) on the outer surface in the primary seal tongue (6-4) of V font and primary seal tongue (6-4) outside, offer through hole (12-1) on the connecting plate (12) of described rope sheave (10) below, offer fall line through hole (1-2) on the valve body (1) of described rope sheave (10) below, the direction of axis line of described fall line through hole (1-2) is the tangent direction along ring-type grooving (6-1); The valve body (1) that described upper saw pulley (9) is arranged on fall line through hole (1-2) below upward and with valve body (1) is rotationally connected; An end of wire rope (7) is fixedlyed connected with rope sheave (10), No. two ends of wire rope (7) pass the top of through hole (12-1) the fall line through hole (1-2) on the connecting plate, be wrapped in the ring-type grooving (6-1) on the seal ring (6), pass the bottom of the fall line through hole (1-2) on the valve body (1) and walk around with an end of wire rope (7) and fixedly connected from the bottom of upper saw pulley (9).

7, locking butterfly valve according to claim 6, it is characterized in that it also comprises left pressing plate (19), right pressing plate (14), several fastening screw trip bolts (15), several fastening screw trip bolt seats (16), euphroe (17) and wear ring (18), the inwall of described valve body (1) is provided with ring-type swallow-tail form boss (1-3); The both sides of described seal ring (6) external diameter are respectively equipped with first seal boss (6-2) and second seal boss (6-3), first annular boss (6-2) on the seal ring (6) and second annular boss (6-3) are separately positioned on the both sides of the ring-type swallow-tail form boss (1-3) on the valve body (1), left pressing plate (19) and right pressing plate (14) are ring-type and are separately positioned on the both sides of seal ring (6), several fastening screw trip bolt seats (16) are separately positioned on the left of the left pressing plate (19) and on the inwall of the valve body (1) on right pressing plate (14) right side, several fastening screw trip bolts (15) are threaded with several fastening screw trip bolt seats (16) respectively and difference fastening left pressing plate (19) and right pressing plate (14); Described wear ring (18) is arranged on the bottom land that seal ring (6) is gone up ring-type grooving (6-1); Offer radial hole (10-2) on the described rope sheave (10), the outer round surface that No. one of described wire rope (7) end passes radial hole (10-2) and walks around rope sheave (10) is fixedlyed connected with rising to the bait of euphroe (17), and the following hook of euphroe (17) is fixedlyed connected with No. two ends of wire rope (7).

8, locking butterfly valve according to claim 6, the surface, outer (2-1) that it is characterized in that described valve plate (2) is sphere or stepped cylndrical surface.

9,, it is characterized in that described left pressing plate (19) is an inclined-plane (19-1) and oblique consistent with the inclined-plane, left side of primary seal tongue (6-4) with the opposing side of the primary seal tongue (6-4) of seal ring (6) according to claim 6,7 or 8 described locking butterfly valves; The opposing side that described right pressing plate (14) is gone up with the primary seal tongue (6-4) of seal ring (6) is No. two inclined-planes (14-1) and oblique consistent with the inclined-plane, right side of primary seal tongue (6-4).

10, locking butterfly valve according to claim 6, it is characterized in that it also comprises No. two left pressing plates (20) and No. two right pressing plates (21) and several screws (22), described No. two left pressing plates (20) and No. two right pressing plates (21) are ring-type, the right side of No. two left pressing plates (20) is provided with right belling platform (20-1), the left side of No. two right pressing plates (21) is provided with left belling platform (21-1), opposite position with a boss (6-5) and No. two boss (6-6) on the inwall of valve body (1) has a groove (1-4) and No. two grooves (1-5), and a boss (6-5) and No. two boss (6-6) place respectively in a groove (1-4) and No. two grooves (1-5); The right belling platform (20-1) of described No. two left pressing plates (20) and the left belling platform (21-1) of No. two right pressing plates (21) are pressed in respectively on first annular boss (6-2) and second annular boss (6-3) on the seal ring (6), and described No. two left pressing plates (20) and No. two right pressing plates (21) are fastened on the inwall of valve body (1) by several screws (22) respectively; Be respectively arranged with a boss (6-5) and No. two boss (6-6) on the external cylindrical surface of last ring-type grooving (6-1) left and right sides of described seal ring (6).