CN2186843Y

CN2186843Y - Flange plate

Info

Publication number: CN2186843Y
Application number: CN 93231564
Authority: CN
Inventors: 王明镜
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-08-04
Filing date: 1993-08-04
Publication date: 1995-01-04
Anticipated expiration: 2003-08-04

Abstract

The utility model discloses a novel flange disk. The novel flange disk is suitable for the connection of a positive pressure pneumatic conveying pipeline. A U-shaped annular sealing groove is arranged on the sealing contact surface of the common flange disk on the basis of the common flange disk. When two flange disks are in butt joint, special sealing annular rings which are matched with the sealing annular ring cavities of two groove butt joint open lines are adopted to be embedded and squeezed to be sealed inside the sealing annular ring cavities to enlarge the sealing contact surface. The original sealing washer is matched to form secondary seal to cause tightness seal without leakage, and the effect of the sealing surface of a circular ring can not be damaged. The novel flange disk has simple manufacture and reliable use.

Description

Flange plate

The utility model is the improvement to pipeline flange connecting dish, and it belongs to the pneumatic transport equipment technical field.

In pneumatic transport equipment, flange plate is applied to the pipeline connection and is found everywhere.General flange plate, its sealing surface all are circular planes shapes.Be welded on two flange plate at pipeline opening place, symmetry is installed together, the contact of the sealing surface of its two flange plate by seal washer as stuffing box packing.The toroidal surface of this flange plate often loses the seal washer dislocation because dislocation is installed, or breaks through owing to seal washer self aging cracking and by barotropic fluid and to cause leakage.The sealing contact surface of this flange plate is less, and radial alignment is short, is not enough to stop leaking of barotropic fluid, and leak time is long slightly, will cause the damage of sealing surface.Therefore, this common flange plate is shorter working life.

The purpose of this utility model is to want the sealability of reinforcing flange dish, increases the sealing contact surface of flange plate, does not leak to guarantee that flange plate connects, and does not damage, and prolongs its working life.

Task of the present utility model is that following scheme is finished: designed a kind of novel flange dish.This dish remains with: the circle ring disk that has some bolts hole on the basis of former plain edition flange plate; The cascade at this disk center place is taken over mouth, and this mouth is in circle ring disk inboard person and is inner diameter hole, and the step place of this inner diameter hole is the external diameter hole, expands the shape soldering opening in the outside, external diameter hole for putting.This novel flange dish is on the O-ring anchor ring of circle ring disk inboard, and the annular seal groove of a cross section for " U " shape is set.When two these flange plate are welded on two pipe joints symmetrically and are docking together, corresponding " U " shape annular seal groove of the circle ring disk inboard of two flange plate butt joint formation sealing ring chamber.In sealing ring chamber, can fill out the sealing ring of envelope and this ring cavity shape coupling.Be encapsulated in this ring chamber owing to sealing embedded crowded the filling out of ring like this, and enlarged the flangeseal surface of contact, form and seal the defence line together, and be axial sealing defence line face.This leaks to the obstruction fluid and plays the effect of decision.In this ring outside, utilize former flange seal packing ring that the O-ring anchor ring is carried out secondary seal again, after fastening two flange plate of some bolts and the flange of finishing pipeline connects.The flange of this secondary seal filler connects, and has increased sealing contact surface, thereby has improved the sealability of this flange plate.Because the butt joint of annular seal groove makes the butt joint of two flange plate accurately, unlikely dislocation and damage seal washer and O-ring anchor ring, thus improved the working life of this flange plate.

For the ratio of reasonably combined sealing contact surface, the width of cross section " U " the shape notch of the annular seal groove of this flange plate is generally 1/3 of sealed circular ring face width degree and is advisable.Formed sealing ring chamber embedding is crowded fills out the envelope needs for the two annular seal grooves that adapt to this flange plate dock, and supporting sealing ring, the major axis of its cross section are slightly larger than " U " shape depth of rebate of 2 times, add the thickness sum of seal washer again.Such major axis just can guarantee embedding squeeze fill out be encapsulated in the sealing ring chamber abundant and seal.

Embodiment's accompanying drawings of the present utility model it: this flange plate of making is as shown in drawings.Fig. 1 is the radial cross section schematic representation of this flange plate.Fig. 1 has: circle ring disk 1, bolt hole 2, annular seal groove 3, inner diameter hole 4, external diameter hole 5, soldering opening 6.

Fig. 2 is the plan view of this flange plate.

Fig. 2 has: circle ring disk 1, bolt hole 2, annular seal groove 3, inner diameter hole 4.

Fig. 3 uses the schematic representation of stuffing box packing for the butt joint of this flange plate.

Fig. 3 has: circle ring disk 1, and bolt hole 2, annular seal groove 3, inner diameter hole 4, external diameter hole 5, soldering opening 6, sealing ring 3 ', seal washer 3 ".

The most preferred embodiment of this flange plate, as shown in Figure 3: this flange plate employing high-quality steel are made the circle ring disk 1 with six bolts hole 2, and its nominal diameter φ is 120mm, and the width of its O-ring anchor ring is 24mm.Be provided with cascade at pore place, the center of this dish 1 and take over a mouthful 4-5, this mouthful is outward the soldering opening 6 of chamfering.When the flange plate butt joint of two symplex structures is used, select the withstand voltage oil resistant rubber matter sealing of high-quality ring 3 ' filler for use, insert in " U " shape groove of sealing groove 3, the width of rebate of this groove 3 is 8mm, depth of rebate is 10mm, select rubber gasket 3 again for use ", folder is filled out between the flange plate outside the sealing groove 3, carries out secondary seal.This flange plate is applied to the ducted connection of grain machinery, and its effect is excellent.

Claims

1, a kind of flange plate, it includes the circle ring disk (1) that has some bolts hole (2), this dish (1) center is provided with cascade and takes over mouth, this mouth is in the inboard person of circle ring disk (1) and is inner diameter hole (4), step place, this hole (4) is external diameter hole (5), expand shape soldering opening (6) in this hole (5) outside for putting, it is characterized in that: on the O-ring anchor ring of circle ring disk (1) inboard, be provided with the annular seal groove (3) of a cross section for " U " shape.

2, flange plate according to claim 1 is characterized in that: the width of its cross section of described annular seal groove (3) " U " shape notch is generally 1/3 of sealed circular ring face width degree and is advisable.