CN114877150A - Rubber ring electric melting double-sealing polyethylene composite pipe butt joint structure - Google Patents

Abstract

The invention proposes a butt joint structure of a rubber ring electrofusion double-sealed polyethylene composite pipe, which relates to the technical field of polyethylene composite pipes, including electrofusion polyethylene composite pipe and steel mesh reinforced polyethylene composite pipe. The end has a first plug end, the inner side wall of the first plug end is provided with an electrothermal melting zone, the end edge of the first plug end is provided with a compression ring, and a clamping ring is sandwiched between the compression ring and the end edge of the first plug end. The first sealing ring, the steel mesh reinforced polyethylene composite pipe has a second plug end. The second plug end is inserted into the first plug end and is integrated with the first plug end through the electrothermal fusion process, so that the pipeline after docking has strong environmental adaptability; the first sealing ring and the second plug end The outer side wall of the terminal abuts, the first sealing ring isolates the electrothermal melting zone from the external environment, and the sealing effect is good; the first sealing ring is pressed by the pressing ring, the whole sealing structure is simple, and the first sealing ring and the pressing ring do not need to be It is installed deep into the inside of the pipe body, which is convenient for installation.

Description

A kind of rubber ring electrofusion double sealing polyethylene composite pipe docking structure

technical field

The invention relates to the technical field of polyethylene composite pipes, and more particularly, to a butt joint structure of a rubber ring electrofusion double-sealed polyethylene composite pipe.

Background technique

Polyethylene composite pipe refers to the use of two polyethylene resins of different densities, which are plasticized and melted by two extruders at the same time, and then extruded into a mold capable of forming a composite pipe at the same time. Vinyl composite pipe. This kind of composite pipe can be extruded and compounded by a variety of plastics. The pipe formed by high-density polyethylene and low-density polyethylene has the characteristics of raw materials, and its pressure resistance and corrosion resistance are better than ordinary polyethylene pipes.

However, during the long-term use of the polyethylene composite pipe, it is found that the sealing performance of the butt joint of the polyethylene composite pipe is not good, and the phenomenon of running, dripping and leaking is serious, which causes a serious waste of resources. Therefore, how to provide a butt joint structure of a rubber ring electrofusion double-sealed polyethylene composite pipe with excellent sealing performance is an urgent problem to be solved by those skilled in the art.

SUMMARY OF THE INVENTION

The present invention is to provide a butt joint structure of a rubber ring electrofusion double-sealed polyethylene composite pipe, which has a better sealing effect at the joint.

Embodiments of the present invention are implemented as follows:

Some embodiments of the present invention provide a butt joint structure of an apron fused double-sealed polyethylene composite pipe, including an fused polyethylene composite pipe and a steel mesh reinforced polyethylene composite pipe;

The end of the electrofusion polyethylene composite pipe is provided with a first plug end, the inner side wall of the first plug end is provided with an electrothermal fusion zone, and the outer side wall of the first plug end is provided with an electrofusion terminal that is connected to the electrothermal fusion zone, The end edge of the first plug-in end is provided with a pressing ring, and a first sealing ring is clamped between the pressing ring and the end edge of the first plug-in end;

The outer side wall of the steel mesh reinforced polyethylene composite pipe is wrapped with a PE layer. The belt is spaced from the end of the second plug-in end;

The end of the second plug end passes through a compression ring and is plugged into the first plug end, the PE layer and the electrothermal fusion zone are fixedly connected by the electrothermal fusion process, and the self-adhesive reinforcing tape and the compression ring are away from the first plug connection The side wall of the end is abutted, and the inner edge of the first sealing ring is abutted with the outer side wall of the second plug end.

In some embodiments of the present invention, the steel mesh reinforced polyethylene composite pipe includes a core pipe and a steel wire reinforcement layer sequentially arranged from the inside to the outside, and the PE layer is wrapped on the outside of the steel wire reinforcement layer;

A hot-melt adhesive layer is arranged between the core tube and the steel wire reinforcement layer, between the steel wire reinforcement layer and the PE layer. Layer bonding.

In some embodiments of the present invention, the outer side wall of the steel mesh reinforced polyethylene composite pipe is wrapped with a PP protective layer, and the PP protective layer is located on the side of the self-adhesive reinforcing tape away from the compression ring.

In some embodiments of the present invention, a plurality of fixing bolts are further included, the compression ring is connected to the first plug end through a plurality of fixing bolts, and the plurality of fixing bolts are evenly distributed around the compression ring;

The first sealing ring has elasticity, the first sealing ring is disposed on the side of the fixing bolt facing the inside of the first plug-in end, and the extension of the first sealing ring is in contact with the side wall of the fixing bolt.

In some embodiments of the present invention, the self-adhesive reinforcing tape is a PE material with adhesive tape, a glass fiber material with an adhesive tape, a PVC material with an adhesive tape or a stainless steel material with an adhesive tape.

In some embodiments of the present invention, the inner side wall of the first plug end is provided with a retaining ring, the electrothermal fusion zone is located between the first sealing ring and the retaining ring, and the end of the second plug end abuts against the retaining ring .

In some embodiments of the present invention, the inner side wall of the first plug end is provided with an annular sealing groove, the annular sealing groove is located between the electrothermal melting zone and the retaining ring, and the annular sealing groove is provided with a second sealing ring, The second sealing ring is in contact with the outer side wall of the second plug end.

In some embodiments of the present invention, the outer sidewall of the first plug end is provided with a raised ridge opposite to the annular sealing groove.

In some embodiments of the present invention, a third sealing ring is further included, and the third sealing ring is provided to seal the outer circumferential gap between the pressing ring and the edge of the first plug end.

In some embodiments of the present invention, the outer peripheral diameter of the pressing ring is larger than the outer peripheral diameter of the first plug end, a shielding wall is provided on the circumference of the electrofusion terminal, and the third sealing ring is clamped between the pressing ring and the shielding wall between.

Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

The invention provides a butt joint structure of a rubber-ring electrofused double-sealed polyethylene composite pipe, comprising an electrofused polyethylene composite pipe and a steel mesh reinforced polyethylene composite pipe; the end of the electrofused polyethylene composite pipe has a first plug end, The inner sidewall of the first plug-in end is provided with an electrothermal fusion zone, the outer sidewall of the first plug-in terminal is provided with an electrofusion stud that conducts with the electrothermal fusion zone, and a compression ring is arranged along the end edge of the first plug-in terminal, and the compression ring and the A first sealing ring is clamped between the end edges of the first plug end; the outer side wall of the steel mesh reinforced polyethylene composite pipe is wrapped with a PE layer, and the steel mesh reinforced polyethylene composite pipe has a second plug end, and the second plug The outer side wall of the end has a self-adhesive reinforcing tape arranged around the PE layer, and the self-adhesive reinforcing tape is arranged at intervals from the end of the second plug end; , the PE layer and the electrothermal melting zone are fixedly connected by the electrothermal melting process, the self-adhesive reinforcing tape is in contact with the side wall of the pressing ring away from the first plug end, and the inner edge of the first sealing ring is in contact with the outer side wall of the second plug end .

The second plug end of the steel mesh reinforced polyethylene composite pipe is inserted into the first plug end of the electrofusion polyethylene composite pipe, and is integrated with the pipe body through the electrothermal melting process, so that the pipeline after docking has a strong The first sealing ring is in contact with the outer side wall of the second plug-in end, the first sealing ring seals the gap between the second plug-in end and the first plug-in end, and separates the electrothermal fusion zone from the The external environment is isolated, and the sealing effect is good; the first sealing ring is pressed by the pressing ring, and the whole sealing structure is simple, and the first sealing ring and the pressing ring do not need to go deep into the inside of the fused polyethylene composite pipe for installation, and the installation is convenient. The self-adhesive reinforcing tape can avoid the bulging phenomenon at the corresponding position when the hot melt is heated, increase the stability of the joint, and improve the pressure bearing capacity of the joint. At the same time, the self-adhesive reinforcing tape abuts against the side wall of the pressing ring facing away from the first insertion end, so as to limit the insertion depth of the second insertion end. When the distance between the self-adhesive reinforcing tape and the second plug end is a standardized design value, this setting can further standardize the insertion of the steel mesh reinforced polyethylene composite pipe and facilitate the length design of the steel mesh reinforced polyethylene composite pipe.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

1 is a cross-sectional view of the overall structure of the first butt joint structure of an electrofused polyethylene composite pipe and a steel mesh reinforced polyethylene composite pipe according to an embodiment of the present invention;

2 is a cross-sectional view of the first structure of a steel mesh reinforced polyethylene composite pipe according to an embodiment of the present invention;

3 is a cross-sectional view of the second structure of a steel mesh reinforced polyethylene composite pipe according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view of the overall structure of the second type of butt joint structure between the fused polyethylene composite pipe and the steel mesh reinforced polyethylene composite pipe according to the embodiment of the present invention.

Icon: 100-electrofusion polyethylene composite pipe; 200-steel mesh reinforced polyethylene composite pipe; 1-first plug end; 2-electrofusion zone; 3-electrofusion terminal; 4-compression ring; 5- 1st sealing ring; 6-second plug end; 7-PE layer; 8-self-adhesive reinforced tape; 9-core pipe; 10-steel wire reinforcement layer; 11-hot melt adhesive layer; 12-PP protective layer; 13 -Fixed bolt; 14-rubber layer; 15-retaining ring; 16-annular sealing groove; 17-second sealing ring; 18-ridge; 19-third sealing ring; 20-blocking wall.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", The orientation or positional relationship indicated by "outside" is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that is usually placed when the product of the invention is used, which is only for the convenience of describing the present invention and simplifying the description, and It is not indicated or implied that the indicated device or element must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", etc. are only used to differentiate the description and should not be construed to indicate or imply relative importance.

Furthermore, the appearance of the terms "horizontal", "vertical", "overhanging" etc. does not imply that the component is required to be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", it does not mean that the structure must be completely horizontal, but can be slightly inclined.

In the description of the embodiments of the present invention, "a plurality of" means at least two.

In the description of the embodiments of the present invention, it should also be noted that, unless otherwise expressly specified and limited, the terms "set", "installed", "connected" and "connected" should be understood in a broad sense. It can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Example

Please refer to Figure 1-Figure 4.

This embodiment provides a butt joint structure of a rubber-ring fused double-sealed polyethylene composite pipe, including an fused polyethylene composite pipe 100 and a steel mesh reinforced polyethylene composite pipe 200; the end of the fused polyethylene composite pipe 100 has a first Plug terminal 1, the inner side wall of the first plug terminal 1 is provided with an electrothermal fusion zone 2, and the outer side wall of the first plug terminal 1 is provided with an electrofusion terminal 3 that conducts with the electrothermal fusion zone 2. The end edge of the end 1 is provided with a compression ring 4, and a first sealing ring 5 is sandwiched between the compression ring 4 and the end edge of the first plug-in end 1; the outer side wall of the steel mesh reinforced polyethylene composite pipe 200 is wrapped with PE Layer 7, the outer side wall of the steel mesh reinforced polyethylene composite pipe 200 has a second plug end 6, and the outer side wall of the second plug end 6 has a self-adhesive reinforcing tape 8 arranged around the PE layer 7. The ends of the second plug-in terminals 6 are arranged at intervals; the ends of the second plug-in terminals 6 pass through the compression ring 4 and are plugged into the interior of the first plug-in terminals 1 , and the PE layer 7 passes through the electrothermal melting zone 2 The electrothermal fusion process is fixedly connected, the self-adhesive reinforcing tape 8 abuts the side wall of the pressing ring 4 away from the first plug end 1 , and the inner edge of the first sealing ring 5 abuts the outer side wall of the second plug end 6 .

In this embodiment, as shown in FIG. 1 , the compression ring 4 is a steel ring, and the part of the steel mesh reinforced polyethylene composite pipe 200 located on the self-adhesive reinforcing tape 8 and the part located on the self-adhesive reinforcing tape 8 toward the first plug end The parts of 1 are combined to form the second plug terminal 6 . The end of the second plug-in terminal 6 passes through the compression ring 4 and is plugged into the inside of the first plug-in terminal 1. The PE layer 7 of the second plug-in terminal 6 is fused with the first plug-in terminal through an electrothermal fusion process. Integrated, so that the pipeline after docking has a strong ability to adapt to the environment. The first sealing ring 5 is in contact with the outer side wall of the second plug-in end 6, the first sealing ring 5 seals the gap between the second plug-in end 6 and the first plug-in end 1, and the electrothermal fusion zone is closed. 2 It is isolated from the external environment, and the sealing effect is good. The first sealing ring 5 is pressed by the pressing ring 4 . The whole sealing structure is simple, and the first sealing ring 5 and the pressing ring 4 do not need to penetrate into the inside of the electrofusion polyethylene composite pipe 100 for installation, which is convenient for installation. The docking structure achieves a better sealing effect through relatively simple structural components. In the process of hot melt heating, because the pipeline around the electrothermal melting zone 2 is also heated, the performance of the joint will be reduced, and it will become the weakest point in the pipeline and the most likely to burst after bearing pressure. The self-adhesive reinforcing tape 8 can avoid the bulging phenomenon at the corresponding position when the hot melt is heated, which increases the stability of the joint and improves the pressure bearing capacity of the joint. At the same time, the self-adhesive reinforcing tape 8 abuts against the side wall of the pressing ring 4 away from the first insertion end 1 to limit the insertion depth of the second insertion end. When the distance between the self-adhesive reinforcing tape 8 and the end edge of the second plug end 6 is a standardized design value, this setting can further standardize the insertion of the steel mesh reinforced polyethylene composite pipe 200, and facilitate the insertion of the steel mesh reinforced polyethylene composite pipe 200. Length design.

Preferably, the self-adhesive reinforcing tape 8 is a PE material tape adhesive tape, the distance from the end edge of the second plug end 6 is 10-20 cm, and the thickness of the PE layer 7 is 2-20 mm. The specific size needs to be set according to the pipe diameter and connection strength requirements of the fused polyethylene composite pipe 100 and the steel mesh reinforced polyethylene composite pipe 200 .

In other embodiments other than the above-mentioned embodiment, the self-adhesive reinforcing tape 8 can also be selected from glass fiber material tape adhesive tape, PVC material tape tape tape or stainless steel material tape tape tape.

Further, as shown in FIG. 1 , the steel mesh reinforced polyethylene composite pipe 200 includes a core pipe 9 and a steel wire reinforcement layer 10 arranged in sequence from the inside to the outside, and the PE layer 7 is wrapped on the outside of the steel wire reinforcement layer 10; the core pipe 9 and the steel wire reinforcement layer 10 are wrapped. Between the steel wire reinforcement layers 10 and between the steel wire reinforcement layer 10 and the PE layer 7, a hot melt adhesive layer 11 is arranged. The adhesive layer 11 is bonded and fixed with the steel wire reinforcement layer 10 .

Further, as shown in FIG. 1 , the outer side wall of the steel mesh reinforced polyethylene composite pipe 200 is wrapped with a PP protective layer 12 , and the PP protective layer 12 is located on the side of the self-adhesive reinforcing tape 8 away from the compression ring 4 .

In this embodiment, as shown in FIG. 2 , the PP protective layer 12 is wrapped on the outer side of the PE layer 7 , and the self-adhesive reinforcing tape 8 is arranged around the outer side of the PP protective layer 12 . When the first plug terminal 1 needs to be butted with the second plug terminal 6, the PP protective layer 12 between the self-adhesive reinforcing tape 8 and the end of the second plug terminal 6 is peeled off by a utility knife and other tools to expose the PE layer 7. After the PE layer 7 is inserted into the first plug terminal 1, it is fixed with the electrothermal fusion zone 2 through the electrothermal fusion process.

In the above embodiment, the thickness of the PP protective layer 12 is preferably in the range of 0.05-10 mm. The PP protective layer 12 can prevent ultraviolet radiation, anti-aging, can also prevent scratches during transportation, and prevent the stability of the composite pipe from being affected.

In other embodiments other than the above-mentioned embodiment, as shown in FIG. 3 , the self-adhesive reinforcing tape 8 is arranged around the outer side of the PE layer 7 , and the PP protective layer 12 wraps the PE layer 7 and the self-adhesive reinforcing tape 8 at the same time. When the first plug terminal 1 needs to be butted with the second plug terminal 6, the PP protective layer 12 between the self-adhesive reinforcing tape 8 and the end of the second plug terminal 6 is peeled off by a utility knife and other tools to expose the PE layer 7.

Further, as shown in FIG. 1, it also includes a plurality of fixing bolts 13, the compression ring 4 is connected to the first plug end 1 through a plurality of fixing bolts 13, and the plurality of fixing bolts 13 are evenly distributed around the compression ring 4; A sealing ring 5 has elasticity. The first sealing ring 5 is located on the side of the fixing bolt 13 facing the inside of the first plug end 1 .

In this embodiment, six bolt holes are evenly formed around the pressing ring 4, and the pressing ring 4 is connected to the end of the first plug-in end 1 through six fixing bolts 13, so that the The connection strength is uniform. In other embodiments, the number of the fixing bolts 13 may be four or eight, etc., according to the different requirements of the pipe diameter and the connection strength of the pipe body.

Preferably, as shown in FIG. 1 , an elastic rubber ring is selected for the first sealing ring 5 , and all the fixing bolts 13 are arranged to fit the outer peripheral edge of the first sealing ring 5 . At this time, the first sealing ring 5 is simultaneously limited by the edge of the first insertion end, the pressing ring 4 and the fixing bolt 13 , which ensures the stability of the first sealing ring 5 . During the process of inserting the second insertion end into the first insertion end, the fixing bolt 13 can restrain the outer circumference of the first sealing ring 5 from elastic deformation in the direction away from the second insertion end to a certain extent. The pressing action makes the pressing action between the first sealing ring 5 and the outer side wall of the second insertion end stronger, and the sealing effect is better.

In other embodiments other than the above-mentioned embodiment, as shown in FIG. 4 , the first sealing ring 5 adopts a steel ring, the inner side wall of the first sealing ring 5 is provided with a rubber layer 14 , and the rubber layer 14 is in contact with the outer side wall of the second insertion end. catch. The fixing bolts 13 are arranged through the pressing ring 4 and the first sealing ring 5 in sequence, and are finally screwed to the end edge of the first plug-in end 1 . This arrangement results in a higher strength of the seal assembly.

Further, as shown in FIG. 1 , the inner side wall of the first plug end 1 is provided with a retaining ring 15 , the electrothermal melting zone 2 is located between the first sealing ring 5 and the retaining ring 15 , and the second plug end 6 is provided with a retaining ring 15 . The end portion is in contact with the retaining ring 15 . The retaining ring 15 cooperates with the self-adhesive reinforcing tape 8 to limit the depth that the second insertion end extends into the first insertion end, so that the first insertion end and the second insertion end are mutually limited.

Further, as shown in FIG. 1 , the inner side wall of the first plug end 1 is provided with an annular sealing groove 16 , the annular sealing groove 16 is located between the electrothermal melting zone 2 and the retaining ring 15 , and the annular sealing groove 16 is A second sealing ring 17 is provided, and the second sealing ring 17 is in abutment with the outer side wall of the second plug end 6 .

In this embodiment, the second sealing ring 17 also adopts a rubber sealing ring. The second sealing ring 17 is used as another sealing structure to seal the gap between the second insertion end and the first insertion end. The annular sealing groove 16 is located between the electrothermal fusion zone 2 and the retaining ring 15, that is, the electrothermal fusion zone 2 is located between the first sealing ring 5 and the second sealing ring 17, so that both sides of the hot melt connection are sealed, Enhanced sealing effect.

Further, as shown in FIG. 1 , the outer side wall of the first plug end 1 is provided with a raised ridge 18 opposite to the annular sealing groove 16 .

In this embodiment, the annular sealing groove 16 reduces the wall thickness of the first plug end 1 at the annular sealing groove 16, thereby reducing the strength. A raised ridge 18 opposite to the annular sealing groove 16 is provided on the outer side wall of the first plug end 1 to thicken the wall thickness of the first plug end 1 there to ensure its strength.

Preferably, the size of the ridge 18 ensures that the wall thickness of the first plug end 1 at the annular sealing groove 16 is the same as the wall thickness of other parts of the fused polyethylene composite pipe 100 to ensure uniform strength everywhere.

Further, based on what is shown in FIG. 1 , a third sealing ring 19 is further included, and the third sealing ring 19 is arranged to block the outer peripheral gap between the pressing ring 4 and the end edge of the first plug end 1 .

In this embodiment, the third sealing ring 19 is also a rubber sealing ring, and the third sealing ring 19 seals the outer periphery of the gap between the pressing ring 4 and the first plug end 1 to prevent foreign substances from entering the above-mentioned gap In the process, external substances are prevented from corroding the fixing bolts 13 and the first sealing ring 5, and the service life of the entire fused polyethylene composite pipe 100 is prolonged.

Further, as shown in FIG. 1 , the outer diameter of the compression ring 4 is larger than the outer diameter of the first plug end 1 , a shielding wall 20 is provided in the circumferential direction of the electrofusion terminal 3 , and the third sealing ring 19 is clamped in the compression ring 19 . between the tight ring 4 and the shielding wall 20 .

In this embodiment, the outer diameter of the pressing ring 4 is larger than the outer diameter of the plug end, and the third sealing ring 19 is fitted to the pressing ring 4 to prevent the third sealing ring 19 from falling off the end. The shielding wall 20 restricts the position of the electrofusion terminal 3 to ensure that the position can block the peripheral gap between the pressing ring 4 and the edge of the plug-in terminal.

To sum up, the present invention provides a butt joint structure of a rubber-ring fused double-sealed polyethylene composite pipe, including an fused polyethylene composite pipe 100 and a steel mesh reinforced polyethylene composite pipe 200; the end of the fused polyethylene composite pipe 100 The first plug end 1 is provided with a first plug end 1, the inner side wall of the first plug end 1 is provided with an electrothermal fusion zone 2, and the outer side wall of the first plug terminal 1 is provided with an electrofusion terminal 3 which is in conduction with the electrothermal fusion zone 2, A compression ring 4 is arranged on the edge of the first plug end 1, and a first sealing ring 5 is sandwiched between the compression ring 4 and the end edge of the first plug end 1; the outer side of the steel mesh reinforced polyethylene composite pipe 200 The wall is wrapped with a PE layer 7, the steel mesh reinforced polyethylene composite pipe 200 has a second plug end 6, and the outer side wall of the second plug end 6 has a self-adhesive reinforcing tape 8 arranged around the PE layer 7, and the self-adhesive reinforcing tape 8 It is spaced from the end of the second plug end 6; the end of the second plug end 6 passes through the over-compression ring 4 and is plugged into the interior of the first plug end 1, the PE layer 7 and the electrothermal melting zone 2 The self-adhesive reinforcing tape 8 is in contact with the side wall of the pressing ring 4 away from the first plug end 1, and the inner edge of the first sealing ring 5 is in contact with the outer side wall of the second plug end 6. .

The second plug end 6 of the steel mesh reinforced polyethylene composite pipe 200 is inserted into the first plug end 1 of the electrofusion polyethylene composite pipe 100, and is integrated with the pipe body through the electrothermal melting process, so that the butted pipe The road has strong environmental adaptability; the first sealing ring 5 is in contact with the outer side wall of the second plug end 6, and the first sealing ring 5 closes the gap between the second plug end 6 and the first plug end 1 The sealing effect is good; the first sealing ring 5 is pressed by the pressing ring 4, the whole sealing structure is simple, and the first sealing ring 5 and the pressing ring 4 do not need to be deeply The installation is carried out by entering the inside of the fused polyethylene composite pipe 100, which is convenient for installation. The self-adhesive reinforcing tape 8 can avoid the bulging phenomenon at the corresponding position when the hot melt is heated, which increases the stability of the joint and improves the pressure bearing capacity of the joint. At the same time, the self-adhesive reinforcing tape 8 abuts against the side wall of the pressing ring 4 away from the first insertion end 1 to limit the insertion depth of the second insertion end. When the distance between the self-adhesive reinforcing tape 8 and the end edge of the second plug end 6 is a standardized design value, this setting can further standardize the insertion of the steel mesh reinforced polyethylene composite pipe 200, and facilitate the insertion of the steel mesh reinforced polyethylene composite pipe 200. Length design.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. An apron fused double-sealed polyethylene composite pipe butt joint structure is characterized in that, comprising the fused polyethylene composite pipe and the steel mesh reinforced polyethylene composite pipe; The end of the electrofusion polyethylene composite pipe has a first plug end, the inner side wall of the first plug end is provided with an electrothermal fusion zone, and the outer side wall of the first plug end is provided with an electrothermal fusion zone. The conductive electric fusion terminal, the end edge of the first plug end is provided with a compression ring, and a first sealing ring is clamped between the compression ring and the end edge of the first plug end; The outer side wall of the steel mesh reinforced polyethylene composite pipe is wrapped with a PE layer, the steel mesh reinforced polyethylene composite pipe has a second plug end, and the outer side wall of the second plug end has a PE layer arranged around the PE layer. A self-adhesive reinforcing tape, the self-adhesive reinforcing tape is spaced apart from the end of the second plug end; The end of the second plug end passes through the compression ring and is plugged into the inside of the first plug end, the PE layer and the electrothermal fusion zone are fixedly connected by an electrothermal fusion process, and the self- The adhesive reinforcing tape is in contact with the side wall of the pressing ring facing away from the first plug end, and the inner edge of the first sealing ring is in contact with the outer side wall of the second plug end. 2 . The butt joint structure of a rubber-ring electrofusion double-sealed polyethylene composite pipe according to claim 1 , wherein the steel wire mesh reinforced polyethylene composite pipe comprises a core pipe and a steel wire reinforced pipe that are sequentially arranged from inside to outside. 3 . layer, the PE layer is wrapped on the outside of the steel wire reinforcement layer; A hot-melt adhesive layer is arranged between the core tube and the steel wire reinforcement layer, and between the steel wire reinforcement layer and the PE layer, and the steel wire reinforcement layer is connected to the core tube through the hot-melt adhesive layer. Bonding and fixing, the PE layer is bonded and fixed with the steel wire reinforcement layer through the hot melt adhesive layer. 3. The butt joint structure of a rubber-ring electrofusion double-sealed polyethylene composite pipe according to claim 1, wherein the outer side wall of the steel mesh reinforced polyethylene composite pipe is wrapped with a PP protective layer, and the PP protection layer The layer is located on the side of the self-adhesive reinforcement tape facing away from the compression ring. 4 . The butt joint structure of a rubber ring electrofusion double-sealed polyethylene composite pipe according to claim 1 , further comprising a plurality of fixing bolts, and the compression ring is connected to the The first plug end is connected, and a plurality of the fixing bolts are evenly distributed around the pressing ring; The first sealing ring has elasticity, the first sealing ring is located on the side of the fixing bolt facing the inside of the first plug end, and the extension of the first sealing ring is connected to the side wall of the fixing bolt Abut. 5. The butt joint structure of a apron fused double-sealed polyethylene composite pipe according to claim 1, wherein the self-adhesive reinforcing tape is a PE material tape adhesive tape, a glass fiber material tape adhesive tape Tape, PVC material with adhesive tape or stainless steel material with adhesive tape. 6 . The butt joint structure of a rubber ring electro-melting double-sealed polyethylene composite pipe according to claim 1 , wherein the inner side wall of the first plug-in end is provided with a retaining ring, and the electro-thermal melting zone is located at the Between the first sealing ring and the retaining ring, the end of the second plug-in end is in abutment with the retaining ring. 7 . The butt joint structure of a rubber ring electrofusion double-sealed polyethylene composite pipe according to claim 6 , wherein the inner side wall of the first plug-in end is provided with an annular sealing groove, and the annular sealing groove Located between the electrothermal melting zone and the retaining ring, a second sealing ring is arranged in the annular sealing groove, and the second sealing ring is in contact with the outer side wall of the second plug-in end. 8 . The butt joint structure of a rubber ring electrofusion double-sealed polyethylene composite pipe according to claim 7 , wherein the outer side wall of the first plug-in end is provided with a protrusion opposite to the annular sealing groove. 9 . ridge. 9 . The butt joint structure of a rubber-ring electrofusion double-sealed polyethylene composite pipe according to claim 1 , further comprising a third sealing ring, and the third sealing ring seals the compression ring and the The first plug-in end edges are arranged in a peripheral gap between the end edges. 10 . The butt joint structure of an apron fused double-sealed polyethylene composite pipe according to claim 9 , wherein the outer diameter of the pressing ring is larger than the outer diameter of the first plug end, and the electric A shielding wall is provided in the circumferential direction of the welding post, and the third sealing ring is clamped between the pressing ring and the shielding wall.

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