CN2087716U

CN2087716U - High-pressure cone-sealed type butterfly valve

Info

Publication number: CN2087716U
Application number: CN91210211U
Authority: CN
Inventors: 杨文华
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-02-25
Filing date: 1991-02-25
Publication date: 1991-10-30

Abstract

The utility model relates to a high-pressure cone-sealed type butterfly valve. The high-pressure cone-sealed type butterfly valve is characterized in that a valve body is provided with a conical outlet, a valve clack is provided with a pressure relief hole, and the periphery is a conical surface; a sealing ring is arranged on the conical surface, and a transmission mechanism which enables the valve clack to axially move along a valve cavity is provided with a pressure relief hole plug. The utility model has the advantages of simple structure, low cost, long service life, etc.; the high-pressure cone-sealed type butterfly valve is easy open in a working state.

Description

High-pressure cone-sealed type butterfly valve

The utility model relates to a kind of throttle valve, and it is applicable to gas, liquid-working-medium.

In order to change flap and valve pocket line contacting structure form, the inventor had once designed a kind of flap and the valve pocket cone sealed type butterfly valve with the face contact form, and number of patent application is: 90210206.The flap periphery of this valve is the conical surface, and the internal diameter shape of valve body and the shape of flap adapt.And be provided with by be located on the flap eccentric axle bed and by eccentric shaft connected be installed in the connecting plate on the flap axle and be located at flap and connecting plate between the made flap that spring constituted along the axially movable driving mechanism of valve pocket.This valve and existing valve relatively, though bigger progress has been arranged, also desirable not to the utmost, also have the cost height, open relatively deficiencys such as effort, complex-shaped as seal ring, materials are many, during installation fee etc.

The purpose of this utility model is, for overcome above-mentioned deficiency provide a kind of simple and reasonable, cost is low, opens labour-saving cone sealed type butterfly valve during use.

Technical solution of the present utility model is further to be improved existing cone sealed type butterfly valve perfect.In order to reduce cost, simplified structure removes the former tapered seal ring of internal diameter that is located in the valve pocket, and be provided with seal ring on the conical surface of flap periphery, preferably has groove on the conical surface, and seal ring is contained in the groove.Laborsaving for valve is opened when in running order, eliminate the hydrodynamic pressure that acts on the flap, on flap, have relief hole, on connecting plate, be provided with the pressure release stopple, and the axis hole on the eccentric axle bed is made the major axis hole, the major diameter in its hole is perpendicular to flap.

The utility model compared with the prior art, one, owing on the conical surface of flap periphery, have groove, and seal ring is contained in the groove, so it not only simplifies the structure, and has reduced cost, and has prolonged working life.Two, owing on flap, have relief hole, on connecting plate, be provided with the pressure release stopple, and the axis hole on the eccentric axle bed made slotted hole, therefore at first opening the pressure release stopple by flap axle drive connecting plate when opening descends the hydrodynamic pressure that acts on the flap rapidly, just driving flap when the flap axle is rotated further opens, so just, reduced the moment of torsion when opening, and very laborsaving.

Describe a specific embodiment of the present utility model in detail below in conjunction with accompanying drawing.

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

Fig. 2 is the sectional view of the A-A among Fig. 1.

Referring to Fig. 1, Fig. 2, valve body 22 is that two ends have flange 13, and shell wall has the annular valve body of bearing 23 and axis hole.In axis hole, stud with axle sleeve 7,14.In axle sleeve 7,14, flap axle 8 is housed.On the top of axle sleeve 7 rubber seal 6 is housed.On the shell wall that is positioned at axle sleeve 14 underparts, valve body lower end lid 15 is arranged by bolton.At axle sleeve 14 and 15 on valve body lower end lid O shape sealing rubber ring 19 is housed.On the upper end wall of bearing 23, valve body upper press cover 5 and Worm gear case 3 arranged by bolt is firm.The worm gear 24, the worm screw 4 that drive flap axle 8 are housed in Worm gear case 3.By bolt is firm Worm gear case gland 2 and the switch indicator panel 1 that studs with bearing 25 arranged on the top of Worm gear case 3.On the worm screw 4 that is positioned at the Worm gear case outside, handwheel is housed.The outlet of valve body 22 is tapered.Flap 16 is housed in valve body 22, and its flap 16 is disks that a periphery is the conical surface, and has groove on its conical surface, and O shape sealing rubber ring 20 is housed in groove.On the card of flap 16, have relief hole.Platter surface face down bonding at flap 16 has the eccentric axle bed 21 that has the major axis hole, and the major diameter in its major axis hole is perpendicular to flap 16.And be connected with connecting plate 11 on being installed in flap axle 8 by eccentric shaft 12, at the free end of connecting plate 11 axis hole is arranged, and be connected with the stopper rod 9 that has rubber pressure release stopple 18 and pressure release stopple briquetting 17 by bearing pin 10.

Claims

1, a kind of high pressure cone sealed type butterfly valve, include the flap [16] that periphery is the conical surface, the valve body [22] that internal diameter shape and flap shape adapt, by the made flap [16] that is located at the eccentric axle bed [21] on the flap [16] and is constituted by the connected connecting plate [11] that is installed on the flap axle [8] of eccentric shaft [12] along the axially movable driving mechanism of valve pocket, it is characterized in that on flap [16], having relief hole, on connecting plate [11], be provided with pressure release stopple [18], on the conical surface of flap [16] periphery, be provided with seal ring [20], the axis hole of eccentric axle bed [21] is the major axis hole, and the major diameter in its hole is perpendicular to flap [16].

2, butterfly valve according to claim 1 is characterized in that said seal ring ［ 20 ］ is in the groove that is contained on the flap conical surface.