CN86208027U - Union joint - Google Patents

Abstract

The utility model discloses a union joint mainly used in the connection of the large and the middle transport pipelines, comprising a pipe clamp, a sealing ring and a connecting bolt. The lip of the sealing ring is provided with a plurality of round annular secondary lips to enhance the sealing effect. The stress surface of the ring groove of the pipe clamp is a conical surface, and the bayonet of the pipe clamp is an ellipse. The size of the bayonet is adjustable in order to accommodate the actual state of the pipe, and a liner of the bayonet is arranged between the pipe clamps. The union joint can connect the two pipes together without pipe end connection and favorable sealing effect.

Description

Union joint

The utility model relates to a kind of pipe collar joint, is mainly used in the connection of large and medium-sized conveyance conduit.

Present widely used pipe collar joint is connect with connecting bolt etc. by pipe clamp, seal ring, pipe end to be formed.Pipe clamp is two lobes or many lobes, connects with bolt to each other, and seal ring has inner chamber and two lips of an opening.When the liquid that is transferred entered the seal ring inner chamber, the outer wall that seal ring lip and pipe end are connect compressed, thereby played the effect of sealing.Within the specific limits, the pressure of liquid is big more, and this self-packing effect is just good more.Since the present pipe of supplying, particularly large and medium-sized pipe, and its geometrical shape and size exist bigger deviation, surface finishment is also not too high, and in order to guarantee sealing, this class pipe joint all has pipe end and connects, promptly pipe and pipe end must be connect welded togetherly earlier, and then connect.Workload and cost of production that this has increased construction undoubtedly bring inconvenience to construction.In addition, though this class pipe joint has self-packing characteristics, still have leakage phenomenon to take place sometimes.

The purpose of this utility model is at above-mentioned deficiency, proposes a kind of pipe collar joint that does not have pipe end to connect.

The utility model is made up of pipe clamp, seal ring, bayonet socket liner and connecting bolt.Weld the annulus of a projection during construction at the periphery of pipe joint, this bulge loop is stuck in the annular groove of pipe clamp, so that bear axial force.Seal ring places in the seal groove of pipe clamp, and its lip outer wall direct and pipe is fitted, and each pipe clamp is connected with bolt, and lining is with the bayonet socket liner between pipe clamp.Main points of the present utility model are: have several protruding rings to pay lip on the outer side surface of seal ring lip, in order to strengthen sealing effect.The bayonet socket of pipe clamp is designed to ellipse (refer to fully closed time), by the size of the adjustable homogeneous tube card of connecting bolt bayonet socket folding, so that adapt with the true form or the size of pipe.At this moment, the thickness of bayonet socket liner also should adapt with it, and generally speaking, the major axis of pipe clamp bayonet socket and the difference of minor axis are 1%～1.5% of tube outer diameter.The inboard limit shape of bayonet socket liner and the outer margin contour of seal ring match, and are extruded in order to prevent the opening of seal ring between pipe clamp.The stress surface of pipe clamp annular groove is designed to Yuan Cone face, can make the annular groove stress surface avoid the leg of pipe bulge loop like this, guarantees that the pipe bulge loop contacts with the good of stress surface, and need not processing after bulge loop welds can use.

The eseparation ring that it is inverted T-shape that the thick walled tube that contains Gu Ti Teeth grain liquid for conveying can be provided with a sectional shape at the symmetry plane place of seal ring, the internal diameter of eseparation ring approximates the internal diameter of pipe, and eseparation ring and seal ring are an integral body.During connection, the pipe end face pastes mutually with the both sides of eseparation ring, makes solid body Teeth grain can not enter the seal ring inner chamber, so that guarantee the works fine state of seal ring.

The utility model is owing to connect without pipe end, thereby cost of production is lower, and construction is simple, convenient, and speed of application can improve 3～5 times, and operating expenses can reduce by 10%～30%.

Below in conjunction with accompanying drawing content of the present utility model is illustrated.

Fig. 1 represents a concrete structure figure of the present utility model.

Fig. 2 is the side view of Fig. 1.

Fig. 3 is the structural drawing of seal ring.

Fig. 4 is the partial sectional view at Fig. 2 A-A place.

Fig. 5 represents to be used for the ring structure figure of thick walled tube.

Shown in Fig. 1～2, the pipe collar joint is made up of pipe clamp (1), seal ring (2), bayonet socket liner (3), bolt (4) and nut (5).Pipe clamp has upper and lower two lobes, closes up back (when not adding the cushions) bayonet socket (11) for oval, and the major axis of bayonet socket (11) is positioned on the subdivision line of pipe clamp, and the difference of major axis and minor axis is 1.5% of a tube outer diameter.The stress surface of pipe clamp annular groove (6) (7) Wei Yuan Cone face.The outer margin contour of seal ring (2) is trapezoidal, and respectively there is a lip (8) the inner edge both sides, has the ring of three projectioies to pay lip (9) on the outer side surface of lip (8), and wherein first pair lip is positioned at the end (referring to Fig. 3) of lip (8).One side of bayonet socket liner (3) is straight flange, is close to bolt (4), and another side is concave trapezoidal, just blocks the outer rim (referring to Fig. 4) of seal ring.The bayonet socket liner adopts the asbestos rubber material, also can make of low carbon steel plate.During connection, the bulge loop that is welded in tube end is stuck in the annular groove of pipe clamp (6), the lip of seal ring and tube outer wall are fitted, the big I of pipe clamp bayonet socket is adjusted according to the actual state of pipe, should fill up the bayonet socket liner of respective thickness this moment, so that guarantee that the suffered pressure of the circumferential each point of seal ring is even substantially.

For thick walled tube, seal ring can adopt structure as shown in Figure 5, the eseparation ring (10) that one inverted T-shape is arranged at the symmetry plane place of sealing circle, the tube wall end face pastes mutually with the side of eseparation ring head during connection, but pressure is little, so liquid can enter the seal ring inner chamber by eseparation ring, and Gu Ti Teeth grain can not pass through.

Claims (3)

1, a kind of pipe collar joint, have two lobes or many lobes pipe clamp and a seal ring, connect with bolt between each pipe clamp, it is characterized in that having several protruding rings to pay lip (9) at the outer side surface of seal ring lip (8), the stress surface (7) of pipe clamp annular groove (6) is a conical surface, the bayonet socket of pipe clamp (11) is oval, is provided with bayonet socket liner (3) between each pipe clamp, and the outer margin contour of the inboard limit shape of bayonet socket liner (3) and seal ring (2) matches.

2, pipe collar joint as claimed in claim 1 is characterized in that oval bayonet socket (11) major axis of pipe clamp and the difference of minor axis are 1%～1.5% of tube outer diameter.

3, pipe collar joint as claimed in claim 1 or 2, it is characterized in that at the symmetry plane place of seal ring a sectional shape being arranged is the eseparation ring of inverted T-shape (10), the internal diameter of eseparation ring (10) approximates the internal diameter of connected tube, and eseparation ring and seal ring are as a whole.

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