CN86204092U - Flexible spherical anti-shock sealed pipe union - Google Patents

Abstract

The utility model discloses a flexible anti-shock pipe union. The flexible anti-shock pipe union is characterized in that the end parts of two cylindrical pipes are provided with two pressing rings; the outer part of the pressing ring takes advantage of the inner part of the pressing ring as spherical surface; the two pressing rings are in a screwing connection. The two pressing rings are relevantly pressed and arranged at one side sealing ring which is arranged between the spherical surface and the outer circular surface and the central sealing ring which is arranged between the two pressing rings. The two pressing rings can realize reliable double sealing and bigger flexible anti-shock function; the pipes can deflect 15 DEG-20 DEG when the pipes are joined; the pipe line can rotate in large radiuses. The flexible anti-shock pipe union has the advantages of no mechanical machining, mechanical manufacturing, simple construction, convenient maintenance, and convenient replacement. The flexible anti-shock pipe union can be used for the pipe joints of coal gas, and the cost of the flexible anti-shock pipe union is 5-10% lower compared with the same calibre pipe joints.

Description

Flexible spherical anti-shock sealed pipe union

Present technique belongs to mechanical field.

The present technique device is different with existing pipe joint unit, and it does not have that general pipeline takes is threaded or flanged or joint socket formula connects, and does not also take two ends band inner conical surface joint socket dedicated pipe joint.But a kind of SEALING FITTING that compresses by sphere.Purpose be realize can directly using after simple and reliable, the casting, the bigger effect of interchangeable, flexible antidetonation fast.

Fig. 1 is this novel flexible shock resistant tube seal arrangement, 1-pipe, 2-trim ring, 3-spacer, 4-intermediate seal circle, 5-side sealing circle, 6-bolt, 7-nut, 8-packing ring.

The A-A section that is positioned at pipe center line top among Fig. 1 be fastening before situation, the B-B section of center line below is the situation after fastening.

What this device connected is the normal straight tube of not being with any convex portion, during connection, two pipe ends overlap respectively with trim ring 2, side sealing circle 5, spacer 3 and its peripheral trim ring 2 and intermediate seal circle 4, are fitted together, pass two trim rings 2 with bolt 6 then and connected, shown in Fig. 1 midship section A-A.

Fastening fashionable dress upper gasket 8 and tighten all nuts 7 after, two ends trim ring 2 is pressed to both sides sealing circle 5 and intermediate seal circle 4 simultaneously relatively, makes the seal ring distortion tightly be pressed in (for shown in Fig. 1 section B-B) on each surface of contact, to guarantee sealing fully.

Otherwise dismounting or when changing in this device arbitrary part, as long as turn on nut, and Xiang Yiduan pushes whole joint open, can take out pipe or other parts.

Because this device is enclosed within two tube end peripheries symmetrically, the two ends impacting force directly with the counter-force institute balance of same group of bolt, this just guarantees sealed at both ends impacting force equalization all the time.

The sealing of this device is dual, promptly except seal ring 5 sealings of both sides, also has the second layer sealing that forms with intermediate seal circle 4, thereby has strengthened the reliability of sealing.

After the assembling of this device compressed, it was the sphere (as Fig. 1) of D that two trim ring internal surfaces symmetry is formed diameter, and the spacer two ends then are the conical surfaces of the very big inversion symmetry of cone angle.Form the given shape space by cylndrical surface, sphere and the conical surface like this, not only help compressing of seal ring 5, the more important thing is to make the two pipes angle that deflection is bigger each other (as the angle α among Fig. 1) that is connected.The effect of flexible antidetonation is also bigger.Even the pipe that connects like this can be turned over the angle [alpha] value according to this relatively, the elbow that forms long radius is used.

Fig. 2 is for taking connecting pipeline schematic representation of the present utility model, and wherein 1 is pipe, and the 9th, flexible sphere shock resistant tube piecing devices.

The seal ring section configuration that this device is specific, the section configuration of intermediate seal circle as shown in Figure 1 is oblateness, side sealing circle section configuration, be the rectangle with fillet, such shape pressure distribution after the extrusion-deformation in seal space shown in Figure 1 is more reasonable.

The advantage of this device is that the gap is very big between trim ring, spacer, the pipe.These parts and seal ring are easy to move, aim at along the pipe between centers, and because the trim ring inner ball surface is enclosed within outside the spacer, the automatic centering effect are arranged during assembling.So the scene is adorned, is torn open construction or keeps in repair all very convenient.After this device joint installation automatic centering was fastening, it was hinged to form a flexible sphere, allowed pipe toward each other to the bigger angle of any direction angle displacement, even can form each to the polygonal elbow, had improved adaptability and flexibility to various pipelines.

When turning nut adjusting impacting force during installation, sealing sphere shaped slightly changes, but change very little, seal space and seal ring section configuration (as shown in Figure 2) by Ben Teding, realized reliable sealing, bigger gap between the elasticity of seal ring and part in addition, turn over the angular displacement of α=15 °-20 ° (allowing the angular displacement high approximately 1 times) relatively even can guarantee two tubes as the existing similar gas pipe of this numeric ratio of Fig. 1, still sealing is reliable, has strengthened the effect of its flexible antidetonation greatly.

In addition, this device is insensitive to shape, size error, can take the standard piece except that seal ring is connected with bolt, all the other all parts can directly be cast the back and use, and do not have machined piece, low cost of manufacture, as the embodiment that connects of 200 millimeters bore gas pipes of φ of using this device, compare same roughly the same bore gas pipe device, cost will hang down 5～10%, is convenient to mass production, transportation and use.

This device is widely used, and is particularly suitable for coal gas (or other gases) pipeline with continuous casting straight tube or steel pipe, also can be used for the pipeline of transferring oil, water or other media.

Claims (3)

1, a kind of SEALING FITTING device that is used for gas pipe and other pipelines is characterized in that it is connected institute with two side sealing circles and is formed by two trim rings, spacer, an intermediate seal circle with one group of bolt, is the hinged symmetric arrangement of sphere elasticity on the structure.

2, device according to claim 1, it is characterized in that the spacer both ends of the surface are the conical surfaces that are symmetrical in sphere centre, this conical surface summit overlaps with sphere centre, and the internal surface that two trim rings contact with the side sealing circle to be sphere and pipe outer round surface form respectively that two circle cylindricals are the annulus of sphere.

3, device according to claim 2 is characterized in that seal ring is positioned at described annulus.

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