CN100575759C - A single-step metal pipe connection structure - Google Patents

Abstract

A single-step metal pipe connection structure, characterized in that it consists of a connecting pipe body with a fluid passage, two or more connecting heads with a fluid passage arranged on the connecting pipe main body, and a sealing connection between the connecting heads The inner end is composed of a metal tube with an outer convex ring. The end face of the connector is provided with a circular groove, and a sealing ring is arranged in the groove. The connector is provided with a cap. Threaded connection on the connector, a pressure ring is provided between the cap and the seal ring, a ring close to the end face of the groove is provided on the inner wall of the seal ring end, and a fixed ring is provided on the side of the pressure ring corresponding to the ring of the seal ring. Compared with the prior art, the present invention has the advantage that even if the water pressure is high, the sealing ring can closely adhere to the protruding ring of the metal pipe and seal the protruding ring on the metal pipe on the connecting head of the connecting body.

Description

A single-step metal pipe connection structure

Technical field:

The invention relates to a connecting piece of a metal pipe.

Background technique:

Existing metal pipe connectors are generally composed of a connecting body with a connector, a sealing ring arranged in the connector, and a fixing nut arranged on the connector. When connecting with a metal pipe, the end is provided with a protruding ring The metal tube is inserted into the connector, and then the metal tube is sealed and fixed on the connector through nuts and sealing rings. This kind of metal tube connector requires sufficient deformation of the sealing ring to play a sealing role. Therefore, The sealing ring is relatively wide, but the wider sealing ring deforms greatly when the water pressure is high, so that it cannot fit well on the protruding ring of the metal pipe to seal the protruding ring on the metal pipe on the connection on the connector of the body.

Invention content:

The object of the present invention is to provide a single-step sealing ring that can be tightly attached to the protruding ring of the metal pipe to seal the protruding ring on the metal pipe on the connecting head of the connecting body even if the water pressure is very high. Metal pipe connection structure.

The present invention is achieved in this way, by the main body of the connecting pipe fitting with a fluid channel, two or more connecting heads with a fluid passage arranged on the main body of the connecting pipe fitting, and the end head sealed in the connecting head with The outer convex ring is made of a metal tube, the end face of the connector is provided with a circular groove, the groove is provided with a sealing ring, the connector is provided with a cap, the cap is provided with a metal pipe through hole, and the cap is threaded on the connector A pressure ring is arranged between the cap and the seal ring, a ring close to the end face of the groove is arranged on the inner wall of the end of the seal ring, and a fixed ring is provided on the side of the pressure ring corresponding to the ring of the seal ring. When in use, insert the metal tube with the outer convex ring on the end face into the circular groove, put the sealing ring and the pressure ring on the metal tube respectively, and press the sealing ring tightly on the metal tube through the cap and the pressure ring on the outer convex ring. Since the fixed ring of the pressure ring is tightly pressed on the ring of the sealing ring, and the ring is relatively narrow, the amount of deformation will not be large. In this way, under the tight pressure of the fixed ring, even if the water pressure is high, it will not shrink and fall away. The compression of the fixed ring, so that the side of the pressure ring and the sealing ring are tightly attached together, so that the sealing ring can play its sealing effect.

Here, the wide lower inner wall of the seal ring has a concave shape. The concave inner wall on the lower side makes the sealing ring easy to deform in the up and down direction, ensuring that the sealing ring has a good sealing effect.

Compared with the prior art, the present invention has the advantage that even if the water pressure is high, the sealing ring can closely adhere to the protruding ring of the metal pipe to seal the protruding ring on the metal pipe on the connecting head of the connecting body.

Description of drawings:

Fig. 1 is the structural representation of embodiment 1 of the present invention;

Fig. 2 is the structural representation of embodiment 2 of the present invention;

Fig. 3 is a schematic structural diagram of Embodiment 3 of the present invention.

Detailed ways:

Now in conjunction with accompanying drawing and embodiment the present invention is described in further detail:

As shown in the figure, the present invention consists of a connecting pipe fitting main body 2 with a fluid channel 1, two or more connecting heads 4 with a fluid passage 3 arranged on the connecting pipe fitting main body 2, and the end faces of the connecting heads 4 are arranged There is an annular groove 5, a sealing ring 6 is arranged in the groove 5, a cap 7 is arranged on the connector 4, and a metal pipe through hole 8 is arranged on the cap 7, so that the end face 9a has a metal pipe with an outer convex ring 10 9 is inserted into the ring-shaped groove 5, the cap 7 is screwed on the connector 4, a pressure ring 11 is provided between the cap 7 and the sealing ring 6, and the inner wall of the sealing ring 6 end 6a is provided with a 5 The ring 6b of the end face 5a is provided with a fixed ring 11a on the side of the pressure ring 11 corresponding to the ring 6b of the sealing ring 6. The wide lower inner wall 12 of the seal ring 6 is concave. The concave lower inner wall 12 is adopted to make the sealing ring 6 easily deform in the up and down direction, so as to ensure that the sealing ring 6 has a good sealing effect. When in use, the metal tube 9 with the outer convex ring 10 on the end face 9a is inserted into the annular groove 5, and the sealing ring 6 and the pressure ring 11 are put on the metal tube 9 respectively. The sealing ring 6 is tightly pressed on the outer convex ring 10 of the metal pipe 9 . The cap 7 is fixedly connected with the connector 4 through an internal thread (as shown in FIG. 1 ) or an external thread (as shown in FIG. 2 ) or a screw rod or a nut (as shown in FIG. 3 ).

Claims (2)

1. A single-step metal pipe connection structure, characterized in that it consists of a connecting pipe fitting body with a fluid passage, two or more connectors with a fluid passage arranged on the connecting pipe fitting main body, and are sealed in the connecting head The end of the connector is composed of a metal tube with an outer convex ring. The end face of the connector is provided with a circular groove, and a sealing ring is provided in the groove. The connector is provided with a cap, and the cap is provided with a metal tube through hole. Connected to the connector, a pressure ring is provided between the cap and the sealing ring, a ring close to the end face of the outer convex ring is provided on the inner wall of the sealing ring end, and a fixed ring is provided on the side of the pressure ring corresponding to the ring of the sealing ring. 2. The single-step metal pipe connection structure according to claim 1, characterized in that the wide lower inner wall of the sealing ring is concave.

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