CN207687510U - Plastic-coated steel socket joint connection structure - Google Patents

Abstract

The utility model is related to a kind of plastic-coated steel socket joint connection structures, for the connection between the adapting pipe and insertion pipe that are flared with taper, the adapting pipe and insertion pipe are plastic-coated steel, and the plastic-coated steel socket joint connection structure include be sheathed on adapting pipe and can holding have in adapting pipe flaring one end internally threaded sleeve, be sheathed on insertion pipe and the internally threaded sleeve being connected that can be spirally connected with internally threaded sleeve；Further include be sheathed on insertion pipe and can because the connection of internally threaded sleeve and external thread sleeve, due to be clamped in insertion pipe and be flared inner wall between the first sealing ring and snap ring, and it is embedded with supporting rack in first sealing ring, the peripheral surface of the snap ring is taper, and is fixed with the second sealing ring back in one end of the first sealing ring in snap ring.The plastic-coated steel socket joint connection structure of the utility model can be convenient for the connection between steel pipe, and connect reliably, and have preferable using effect.

Description

Plastic-coated steel socket joint connection structure

Technical field

The utility model belongs to technical field of pipeline connection more particularly to a kind of plastic-coated steel socket joint connection structure.

Background technology

Currently, for the connection between steel pipe mostly using modes such as electric welding connection, flanged joint and quick couplings, but It is non-dismountable after electric welding connection connection, it can make troubles to repair and maintenance in the future, flanged joint needs extra soldered ring flange, meeting Increase cost and workload, and attended operation is inconvenient, it is not big enough that quick coupling connection then has a connection dynamics upon connection, is easy The problem of getting loose.

Utility model content

For above description, the purpose of this utility model is to provide a kind of plastic-coated steel socket joint connection structure, with can be just Connection between steel pipe.

The technical solution of the utility model is achieved in the following ways：

A kind of plastic-coated steel socket joint connection structure, for the company between the adapting pipe and insertion pipe that are flared with taper It connects, and the adapting pipe and insertion pipe are plastic-coated steel, which includes being sheathed on the undertaking Guan Shang and can holding have in the adapting pipe flaring one end internally threaded sleeve, be sheathed on the insertion pipe and can be with The internally threaded sleeve is spirally connected connected internally threaded sleeve；Further include being sheathed on the insertion pipe and can be because of the internal thread The connection of casing and external thread sleeve and be clamped in the insertion pipe and be flared inner wall between the first sealing ring and snap ring, and Supporting rack is embedded in first sealing ring, the peripheral surface of the snap ring is taper, and in the snap ring back in institute The one end for stating the first sealing ring is fixed with the second sealing ring.

As the restriction to aforesaid way, it has been respectively formed on and has cut in the peripheral surface of the internally threaded sleeve and external thread sleeve Face is the operation portion of regular polygon.

As the restriction to aforesaid way, it is equipped with along its axial arranged gap on the snap ring.

As the restriction to aforesaid way, the section of support frame as described above is and to be vertically fixed on first by the first frame body The stairstepping that the both ends of frame body and the second frame body each extended over to two opposite sides are constituted with third frame body.

As the restriction to aforesaid way, the external thread sleeve cloth is extended radially through in being formed on the external thread sleeve The threaded hole set, and can be installed in the holding screw on insertion pipe in being bolted in the threaded hole.

The utility model has the advantage of：

The plastic-coated steel socket joint connection structure of the utility model passes through interior spiral shell after being flared to adapting pipe in connection Connection between line casing and external thread sleeve makes snap ring and two sealing rings be clamped between insertion pipe and flaring inner wall, just The connection between adapting pipe and insertion pipe can be achieved, compared to existing way without carrying out welding and connecting flange, and pass through The clamping of snap ring can ensure bonding strength, by the clamping of two sealing rings, it can be achieved that two-stage sealing, can ensure to connect close Feng Xing, and can make the socket joint connection structure that there is preferable using effect.

In addition, operation portion is respectively set on two threaded sleeves can be convenient for passing through the progress of two casings of tools pair such as spanner Be spirally connected operation.Gap is arranged on snap ring can be conducive to its clamping between insertion pipe and flaring inner wall.Supporting rack, which is stairstepping, to be protected The leakproofness of the second sealing ring is demonstrate,proved, and can help to be promoted the bonding strength of insertion pipe and adapting pipe.It is set on external thread sleeve Set the reliability that holding screw can be further ensured that after two pipeline connections.

Description of the drawings

Fig. 1 is the structural schematic diagram of plastic-coated steel socket joint connection structure in specific embodiment of the present invention；

Fig. 2 is the sectional view in the directions A-A in Fig. 1；

Fig. 3 is the structural schematic diagram of external thread sleeve in specific embodiment of the present invention；

Fig. 4 is the structural schematic diagram of the first sealing ring in specific embodiment of the present invention；

Fig. 5 is the structural schematic diagram of supporting rack in specific embodiment of the present invention；

Fig. 6 is the structural schematic diagram of snap ring and the second sealing ring in specific embodiment of the present invention.

Specific implementation mode

In the description of the present invention, it should be noted that the orientation of the instructions such as term "upper", "lower", "inner", " back of the body " Or position relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description the utility model and simplification is retouched It states, does not indicate or imply the indicated device or element must have a particular orientation, with specific azimuth configuration and operation, Therefore it should not be understood as limiting the present invention.In addition, term " first ", " second " are used for description purposes only, and cannot It is interpreted as indicating or implying relative importance.The utility model will be described in detail below with reference to the accompanying drawings and embodiments.

The present embodiment is related to a kind of plastic-coated steel socket joint connection structure, the adapting pipe for being used to have taper to be flared and grafting Connection between pipe, wherein adapting pipe and insertion pipe are plastic-coated steel, and shown in Fig. 1 combinations Fig. 2, which holds Slotting connection structure include be sheathed on adapting pipe 2 and can holding adapting pipe 2 have flaring one end internally threaded sleeve 3, set On insertion pipe 1 and the internally threaded sleeve 4 being connected that can be spirally connected with internally threaded sleeve 3；Further include being sheathed on insertion pipe 1, simultaneously Can because the connection of internally threaded sleeve 3 and external thread sleeve 4, due to be clamped in insertion pipe 1 and be flared inner wall between the first sealing ring 5 And snap ring 6, and supporting rack is embedded in the first sealing ring 5, the peripheral surface of snap ring 6 is taper, in snap ring 6 back in the One end of one sealing ring 5 is also fixed with the second sealing ring 61.

It, still can be as illustrated in FIG. 1 for ease of the operation that is spirally connected of internal threads casing 3 and external thread sleeve 4 in the present embodiment , it is respectively formed on the operation portion that section is regular polygon in the peripheral surface of internally threaded sleeve 3 and external thread sleeve 4.The operation The section in portion specifically may be, for example, quadrangle, hexagon or octagon, can specifically be selected according to diameter of steel tube.

The internally threaded sleeve 3 of the present embodiment is first is arranged thereon before adapting pipe 2 is flared, and external thread sleeve 4 Structure it is as shown in Figure 3, external thread sleeve 4 is step-like close to one end of the first sealing ring 5 and snap ring 6, wherein the One sealing ring 5 is set on the step surface 41 of 4 end of external thread sleeve, by making the first sealing ring 5 be arranged in step surface 41 On, when external thread sleeve 4 and internally threaded sleeve 3 are spirally connected, one end close to snap ring 6 of external thread sleeve 4 can push card Ring 6, so that snap ring 6 is clamped between insertion pipe 1 and the inner wall of the flaring on adapting pipe 2.And simultaneously, external thread sleeve 4 also may be used The first sealing ring 5 is pushed, to realize the sealing function of the first sealing ring 5.

In addition, the screw thread for extending radially through the external thread sleeve 4 arrangement is also formed in the present embodiment on external thread sleeve 4 Hole, and can be installed in the holding screw 7 on insertion pipe 1 in being bolted in the threaded hole, by the setting of holding screw 7, can carry Reliability after high two pipelines connection.

The structure of first sealing ring 5 of the present embodiment is as shown in Figure 4, and the peripheral surface of first sealing ring 5 is also tapered, The structure of the supporting rack 51 inside the first sealing ring 5 is then as shown in Figure 5 simultaneously, the section of the supporting rack 51 specially by First frame body 511, and vertical the second frame body 512 for being fixed on the both ends of the first frame body 511 and being each extended over to two opposite sides The stairstepping constituted with third frame body 513.By the step-like structure, when the first sealing ring 5 is clamped, supporting rack 51 can Flexible deformation is generated, and so that the first sealing ring 5 is in close contact with insertion pipe 1 and flaring inner wall, to ensure leakproofness, meanwhile, The flexible deformation of supporting rack 51 can also increase the clamping force suffered by the first sealing ring 5, so as to help to improve insertion pipe 1 With the connection reliability of adapting pipe 2.

Institute in the structure such as Fig. 6 of the tapered snap ring 6 and the second sealing ring 61 being connected with snap ring 6 of the present embodiment Showing, the second sealing ring 61 is connected in the miner diameter end of snap ring 6, and in for the benefit of flaring of the snap ring 6 on insertion pipe 1 and adapting pipe 2 Clamping between wall is also equipped on snap ring 6 along its axial arranged gap 62, and the width of gap 62 should not be too big.In addition, To ensure that the sealing of two sealing rings, the first sealing ring 5 and the second sealing ring 61 should all make its outer diameter design when implementing It is slightly larger, with can be closely close to after its deformation insertion pipe 1 and flaring inner wall between.

Internally threaded sleeve 3 when in use, is first sheathed on adapting pipe 2 by the socket joint connection structure of the present embodiment, then right The end of adapting pipe 2 carries out flaring processing, then by external thread sleeve 4, the first sealing ring 5 and is fixed with the second sealing ring 61 again Snap ring 6 be sheathed on insertion pipe 1.Then, the end of insertion pipe 1 is inserted into the flaring on adapting pipe 2, makes internally threaded sleeve 3 and external thread sleeve 4 connect, and screw the two.

And after the plastic-coated steel socket joint connection structure of the present embodiment is flared adapting pipe 2 in connection, pass through interior spiral shell Connection between line casing 3 and external thread sleeve 4, make snap ring 6 and two sealing rings be clamped in insertion pipe 1 and flaring inner wall it Between, it can realize the connection between adapting pipe 2 and insertion pipe 1, compared to existing way without carrying out welding and connecting flange, And bonding strength can be ensured by the clamping of snap ring 6, by the clamping of two sealing rings, it can be achieved that two-stage sealing, Neng Goubao Connection sealing is demonstrate,proved, so as to make the socket joint connection structure that there is preferable using effect.

The foregoing is merely the preferred embodiment of the utility model, but the scope of protection of the utility model is not limited to This, any technical person familiar with the field within the technical scope disclosed by the utility model, technology according to the present utility model Design is subject to the technical solution obtained by equivalent substitution or change, should all be covered by the scope of protection of the utility model.

Claims (5)

1. a kind of plastic-coated steel socket joint connection structure, for the connection between the adapting pipe and insertion pipe that are flared with taper, And the adapting pipe and insertion pipe are plastic-coated steel, it is characterised in that：The plastic-coated steel socket joint connection structure includes being sheathed on On the adapting pipe and can holding the adapting pipe have flaring one end internally threaded sleeve, be sheathed on the insertion pipe The upper and internally threaded sleeve being connected that can be spirally connected with the internally threaded sleeve；Further include being sheathed on the insertion pipe and can be because of institute State the connection of internally threaded sleeve and external thread sleeve and be clamped in the insertion pipe and be flared inner wall between the first sealing ring and Snap ring, and supporting rack is embedded in first sealing ring, the peripheral surface of the snap ring is taper, and in the back of the body of the snap ring Second sealing ring is fixed with for one end of first sealing ring.

2. plastic-coated steel socket joint connection structure according to claim 1, it is characterised in that：In the internally threaded sleeve and outside The peripheral surface of threaded sleeve is respectively formed on the operation portion that section is regular polygon.

3. plastic-coated steel socket joint connection structure according to claim 1, it is characterised in that：It is equipped with along it on the snap ring Axial arranged gap.

4. plastic-coated steel socket joint connection structure according to claim 1, it is characterised in that：It serves as reasons in the section of support frame as described above First frame body, and vertical the second frame body for being fixed on the both ends of the first frame body and being each extended over to two opposite sides and third frame The stairstepping that body is constituted.

5. plastic-coated steel socket joint connection structure according to any one of claim 1 to 4, it is characterised in that：In described outer It is formed with the threaded hole for extending radially through the external thread sleeve arrangement on threaded sleeve, and can be supported in being bolted in the threaded hole The holding screw being placed on insertion pipe.