CN214274780U - Novel joint for connecting plastic-coated steel pipe and cast iron pipe - Google Patents

Abstract

The utility model discloses a novel joint for connecting plastic-coated steel pipes and cast iron pipes, which relates to the technical field of pipeline construction and comprises a short pipe bearing disk, wherein the short pipe bearing disk comprises a short pipe main body, and a flange plate and a socket pipe which are formed at two ends of the short pipe main body; the flange plate is formed with a connecting groove; a first groove is formed in the bellmouth pipe, and the bottom of the first groove is of an inclined plane structure; a plurality of arc-shaped sliding strips are arranged at the bottom of the first groove in a sliding manner, a first elastic sealing strip is also arranged in the first groove, and the first elastic sealing strip is abutted against the sliding strips; one end of the socket pipe, which is far away from the joint main body, is in threaded connection with a plurality of puller bolts, and the end parts of the puller bolts are abutted to the sliding strips. The utility model provides a can satisfy sealing performance demand, and convenient to use, the high novel joint that is used for connecting plastic-coated steel pipe and cast iron pipe of basin nozzle stub pipe when to cast iron pipe flexonics's demand and both ends pipe connection betterly.

Description

Novel joint for connecting plastic-coated steel pipe and cast iron pipe

Technical Field

The utility model relates to a pipeline construction technical field especially relates to a novel joint for connecting plastic-coated steel pipe and cast iron pipe.

Background

Water transportation projects typically involve cast iron pipes and plastic coated steel pipes. Cast iron pipes are pipes cast from cast iron. The plastic-coated steel pipe, also known as plastic-coated pipe, steel-plastic composite pipe and plastic-coated composite steel pipe, is a steel-plastic composite steel pipe which uses steel pipe as base body and adopts the processes of spraying, rolling, soaking and absorbing to weld a plastic anticorrosive layer on the inner surface of the steel pipe (bottom pipe) or weld a plastic anticorrosive layer on the inner and outer surfaces of the steel pipe. In the engineering construction of the ultra-long water transmission pipeline, because the demand of the pipeline is large, the pipeline made of a single material cannot meet the field construction progress, a bearing plate short pipe is usually used for connecting a cast iron pipe and a plastic-coated steel pipe, the cast iron pipe is generally connected with a bearing port, and the plastic-coated pipe is connected with a flange plate. However, the requirements of the bearing disc short pipe for the flexible connection of the cast iron pipe and the sealing performance requirements of the two-end pipeline connection cannot be well met at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a novel joint for connecting plastic-coated steel pipe and cast iron pipe utilizes the demand that can tighten up first elastic sealing strip satisfies cast iron pipe flexonics, and the leakproofness demand when combining the spread groove on the flange dish simultaneously and satisfying the pipe connection in holding dish nozzle stub both ends.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a novel joint for connecting plastic-coated steel pipes and cast iron pipes comprises a short bearing disk pipe, wherein the short bearing disk pipe comprises a short pipe main body, and a flange plate and a bearing pipe which are formed at two ends of the short pipe main body; a connecting groove is formed in the flange plate; a first groove is formed in the bellmouth pipe, and the bottom of the first groove is of an inclined plane structure; a plurality of arc-shaped sliding strips are arranged at the bottom of the first groove in a sliding manner, a first elastic sealing strip is further arranged in the first groove, and the first elastic sealing strip is abutted against the sliding strips; one end of the socket pipe, which is far away from the joint main body, is in threaded connection with a plurality of puller bolts, and the end parts of the puller bolts are abutted to the sliding strips.

By adopting the technical scheme, when in use, an installer inserts the cast iron pipe into the socket pipe until the end of the cast iron pipe abuts against the short pipe main body. Then an installer rotates the puller bolt, the sliding strip moves towards the direction close to the short pipe main body under the pushing of the puller bolt, and in the process, the sliding strip moves towards the axis direction of the socket pipe under the action of the inclined plane at the bottom of the first groove, so that the first elastic sealing strip is pushed to be tightly attached to the outer surface of the cast iron pipe. In such a way, flexible connection is formed between the cast iron pipe and the socket pipe, so that a certain shock resistance at the joint is ensured, and meanwhile, the first elastic sealing strip can be tightened after the cast iron pipe is installed, so that the leakage-proof capability of the joint is improved. The plastic-coated steel pipe is connected in the one end of ring flange, and the arch of plastic-coated steel pipe end cup joints in the spread groove, make the plastic-coated steel pipe with connecting gap between the ring flange prolongs, effectively improves the leak protection ability here.

The utility model discloses further set up to: the cross-sectional shapes of the first groove and the first elastic sealing strip which are perpendicular to the circumferential direction of the first groove and the first elastic sealing strip are trapezoidal, and the smaller ends of the first groove and the first elastic sealing strip face the axial direction of the socket pipe.

Through adopting above-mentioned technical scheme, first elastic sealing strip can be stably installed inside first recess, prevents when the installation cast iron pipe first elastic sealing strip dislocation from causing leaking, guarantees be used for connecting the reliability of the novel joint of plastic-coated steel pipe and cast iron pipe.

The utility model discloses further set up to: and a plurality of inclined water-blocking tapes are formed on the first elastic sealing strips, and the water-blocking tapes point to the axis direction of the socket pipe from the first elastic sealing strips and deviate towards the direction of the short pipe main body.

By adopting the technical scheme, when the cast iron pipe is inserted into the socket pipe, the moving direction of the cast iron pipe is the same as the inclined direction of the water-blocking tape, the resistance is relatively small, and the cast iron pipe can be conveniently installed. After the cast iron pipe is installed, the water blocking tape is tightly attached to the outer wall of the cast iron pipe, and the leakage-proof capability of the socket pipe is effectively improved.

The utility model discloses further set up to: the flange plate is provided with an interface ring, and the interface ring is matched with the connecting groove in an embedding manner.

Through adopting above-mentioned technical scheme, when the plastic-coated steel pipe tip that needs the installation is sunk structure, the interface ring can inlay with the tip of plastic-coated steel pipe and establish the cooperation. And when the pipe end of the plastic-coated steel pipe to be installed is of a convex structure, the interface ring does not need to be installed. This way the adaptability of the flange plate is effectively improved.

The utility model discloses further set up to: the both sides of interface ring axis direction all the shaping have the second recess, the shaping of ring flange relevant position has the third recess, the second recess is embedded to establish the cooperation and is equipped with second elastic sealing strip, the cooperation is established with the third recess to second elastic sealing strip.

Through adopting above-mentioned technical scheme, second elastic sealing strip is through its deformation and ring flange and the inseparable laminating of interface ring, further improves the leak resistance ability of ring flange.

The utility model discloses further set up to: the cross section of the second elastic sealing strip perpendicular to the circumferential direction of the second elastic sealing strip is circular.

By adopting the technical scheme, the installation convenience of the plastic-coated steel pipe is ensured.

The utility model discloses further set up to: the flange plate is formed with a first sawtooth pattern, and the interface ring is formed with a second sawtooth pattern which is matched with the first sawtooth pattern in an embedding manner.

Through adopting above-mentioned technical scheme, the cooperation is established with inlaying of second sawtooth line to first sawtooth line, effectively increases the joint line of ring flange and plastic-coated steel pipe, further improves the leak resistance ability of ring flange.

To sum up, the utility model discloses a beneficial technological effect does:

(1) the first elastic sealing strip which can be tightened is utilized to meet the flexible connection requirement of the cast iron pipe, and the connecting groove on the flange plate is combined to meet the sealing requirement when the pipelines at two ends of the short pipe of the bearing plate are connected;

(2) the adaptability of the novel joint for connecting the plastic-coated steel pipe and the cast iron pipe to the plastic-coated steel pipe is effectively improved by arranging the interface ring on the flange plate;

(3) the section shape of the first groove is set to be trapezoidal, so that dislocation of the first elastic sealing strip is avoided when the cast iron pipe is installed, and the reliability of the novel joint for connecting the plastic-coated steel pipe and the cast iron pipe is guaranteed.

Drawings

Fig. 1 is a schematic view of the overall structure of an embodiment of the present invention;

FIG. 2 is a partial enlarged view of the portion A in FIG. 1, which mainly shows the structure of the sliding strip;

fig. 3 is a partial enlarged view of B in fig. 1, mainly showing the structure of the interface ring.

Reference numerals: 1. a basin short pipe; 101. a spool body; 102. a flange plate; 103. a socket pipe; 2. connecting grooves; 3. an interface ring; 4. a second groove; 5. a third groove; 6. a second elastic sealing strip; 7. a second sawtooth pattern; 8. a first sawtooth pattern; 9. a first groove; 10. a sliding strip; 11. a first elastic sealing strip; 12. a water blocking tape; 13. and tightly pushing the bolt.

Detailed Description

The present invention will now be described more fully hereinafter with reference to the accompanying examples.

Referring to fig. 1 in conjunction with fig. 2 and 3, a novel joint for connecting plastic coated steel pipes and cast iron pipes comprises a short pipe socket 1, wherein the short pipe socket 1 comprises a main body 101, and flanges 102 and a socket pipe 103 formed at two ends of the main body 101. The inner side of the flange plate 102 is formed with a connecting groove 2, an interface ring 3 is embedded and matched in the connecting groove 2, and the inner wall of the interface ring 3 is flush with the inner wall of the short pipe main body 101. The both sides of 3 axial directions of interface ring are all the shaping to have second recess 4, and the shaping of ring flange 102 relevant position has third recess 5, and the cooperation has second elastic sealing strip 6 in the embedding of second recess 4, and second elastic sealing strip 6 is circular rather than the vertical cross-sectional shape in circumference, and second elastic sealing strip 6 inlays with third recess 5 and establishes the cooperation. Second sawtooth patterns 7 are formed at two ends of the interface ring 3 in the axial direction, the second sawtooth patterns 7 are respectively arranged at two sides of the second groove 4, and first sawtooth patterns 8 matched with the second sawtooth patterns 7 in an embedded mode are formed on the flange plate 102.

A first groove 9 is formed in the socket pipe 103, and the bottom of the first groove 9 is of an inclined plane structure; three sections of arc-shaped sliding strips 10 are arranged at the bottom of the first groove 9 in a sliding mode, and the cross section of each sliding strip 10, which is perpendicular to the circumferential direction of the socket pipe 103, is in the shape of a right triangle. The first groove 9 is also internally provided with a first elastic sealing strip 11 which is embedded and matched with the first groove, the first elastic sealing strip 11 is abutted against the sliding strip 10, and the cross sections of the first groove 9 and the first elastic sealing strip 11 which are vertical to the circumferential direction are trapezoidal and the smaller ends face the axial direction of the socket pipe 103. Four inclined water blocking tapes 12 are formed on the first elastic sealing strip 11, and the water blocking tapes 12 are directed to the axial direction of the socket pipe 103 from the first elastic sealing strip 11 and are deviated to the direction of the short pipe main body 101. Socket pipe 103 is kept away from the one end threaded connection who connects the main part has six puller bolt 13, and the tip of puller bolt 13 and the butt of strip 10 that slides and every strip 10 that slides all the butt have two puller bolts 13.

The working principle of the embodiment is as follows: in use the installer inserts the cast iron pipe into the socket pipe 103 until the cast iron pipe end abuts the stub body 101. Then the installer turns the puller bolt 13 to tighten the first elastic sealing strip 11 by the sliding strip 10, so that the first elastic sealing strip 11 is tightly attached to the outer surface of the cast iron pipe. The plastic-coated steel pipe is connected to one end of the flange plate 102, the sunken structure at the end of the plastic-coated steel pipe is matched with the interface ring 3 in an embedding mode, and the connecting gap between the plastic-coated steel pipe and the flange plate 102 is prolonged through the interface ring 3 and the second sawtooth patterns 7 on the interface ring 3, so that the leakage-proof capacity of the plastic-coated steel pipe is effectively improved. In the embodiment, the first elastic sealing strip 11 which can be tightened is utilized to meet the requirement of flexible connection of the cast iron pipe, and the connecting groove 2 on the flange plate 102 is combined to meet the requirement of sealing performance when pipelines at two ends of the short pipe 1 of the basin are connected.

The above, only do the preferred embodiment of the present invention, not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (7)

1. The utility model provides a novel joint for connecting plastic-coated steel pipe and cast iron pipe, includes basin nozzle stub (1), its characterized in that: the bearing disc short pipe (1) comprises a short pipe main body (101), and a flange plate (102) and a socket pipe (103) which are formed at two ends of the short pipe main body (101); the flange plate (102) is provided with a connecting groove (2) in a molding way; a first groove (9) is formed in the socket pipe (103), and the bottom of the first groove (9) is of an inclined plane structure; a plurality of arc-shaped sliding strips (10) are arranged at the bottom of the first groove (9) in a sliding manner, a first elastic sealing strip (11) is further arranged in the first groove (9), and the first elastic sealing strip (11) is abutted to the sliding strips (10); one end of the socket pipe (103) far away from the joint main body is in threaded connection with a plurality of puller bolts (13), and the end parts of the puller bolts (13) are abutted to the sliding strips (10).

2. The new joint for connecting plastic coated steel pipes and cast iron pipes according to claim 1, wherein: the cross sections of the first groove (9) and the first elastic sealing strip (11) which are perpendicular to the circumferential direction of the first groove and the first elastic sealing strip are trapezoidal, and the smaller ends of the first groove and the first elastic sealing strip face the axial direction of the socket pipe (103).

3. The new joint for connecting plastic coated steel pipes and cast iron pipes according to claim 1, wherein: and a plurality of inclined water-blocking tapes (12) are formed on the first elastic sealing strip (11).

4. The new joint for connecting plastic coated steel pipes and cast iron pipes according to claim 1, wherein: the flange plate (102) is provided with an interface ring (3), and the interface ring (3) is embedded and matched with the connecting groove (2).

5. The new joint for connecting plastic coated steel pipes and cast iron pipes according to claim 4, wherein: the equal shaping in both sides of interface ring (3) axis direction has second recess (4), ring flange (102) relevant position shaping has third recess (5), the cooperation is established to second recess (4) embedded establishment, second elastic sealing strip (6) and third recess (5) are inlayed and are established the cooperation.

6. The new joint for connecting plastic coated steel pipes and cast iron pipes according to claim 5, wherein: the cross section of the second elastic sealing strip (6) perpendicular to the circumferential direction is circular.

7. The new joint for connecting plastic coated steel pipes and cast iron pipes according to claim 4, wherein: the flange plate (102) is provided with a first sawtooth pattern (8), and the interface ring (3) is provided with a second sawtooth pattern (7) which is matched with the first sawtooth pattern (8) in an embedded mode.

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