CN216046103U

CN216046103U - Pipe connecting piece capable of realizing electric smelting connection and pipe

Info

Publication number: CN216046103U
Application number: CN202122082654.1U
Authority: CN
Inventors: 齐政新; 张亚辉
Original assignee: Skong Technology Co ltd
Current assignee: Skong Technology Co ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-03-15
Anticipated expiration: 2031-08-31

Abstract

The embodiment of the utility model relates to a pipe connecting piece and a pipe capable of realizing electric smelting connection, wherein the pipe connecting piece comprises: the pipe connecting piece body is connected with a pipe to form a pipeline and comprises at least one connecting end part, the connecting end part is provided with a pipe connecting mechanism, the pipe connecting mechanism is provided with an accommodating cavity for accommodating the pipe connecting piece to be connected to be inserted, and the accommodating cavity comprises a connecting inner layer and a connecting outer layer; the connection inner layer is an electrofusion layer and is used for connecting the pipes to be connected; an electric melting heating wire is arranged between the inner connecting layer and the outer connecting layer, and the electric melting heating wire is heated after being electrified to melt the inner connecting layer and be connected with the pipe to be connected in a sealing way; the connection terminal of the electric melting electric heating wire extends out of the pipe connection piece body. According to the embodiment of the utility model, the pipe connecting piece and the double-layer pipe capable of being connected in an electric melting mode are arranged in a double-layer mode, voltage is loaded on the connecting terminal, the electric melting layer of the outer wall of the heating pipe and the inner wall of the pipe connecting piece is in a melting state, and the pipe connecting piece and the double-layer pipe are connected in a melting mode to form an integral sealing connection after being cooled.

Description

Pipe connecting piece capable of realizing electric smelting connection and pipe

Technical Field

The embodiment of the utility model relates to the technical field of decoration and building material products, in particular to a pipe connecting piece capable of realizing electric smelting connection and a pipe.

Background

This section is intended to introduce the reader to various aspects of art that may be related to various aspects of the present invention, and is believed to provide the reader with useful background information to facilitate a better understanding of the various aspects of the present invention. Accordingly, it should be understood that the description in this section is for purposes of illustration and is not an admission of prior art.

With the development of chemical industry, plastic pipes are basically adopted in cold and hot water supply and heating pipelines of civil buildings at present. Compared with metal pipes, plastic pipes have the advantages of corrosion resistance, no scaling, long service life, low price and convenient installation and transportation, so the plastic pipes are widely applied in recent years. Compared with metal pipes, plastic pipes have a large difference from metal pipes in pressure resistance and temperature resistance, so that the temperature resistance and pressure resistance of the plastic pipes are particularly important for the plastic pipes. Among plastic pipes widely used in civil buildings at present, crosslinked Polyethylene (PEX) pipes are always advocated by various countries in the world due to their high temperature resistance, pressure resistance, excellent creep resistance and scratch resistance. However, since the cross-linked Polyethylene (PEX) pipes cannot be connected by heating and melting, and only mechanical connecting members made of copper are used for pipeline connection, the use of the PEX pipes in the fields of water supply and heating is greatly limited. And because copper connectors are expensive and the reliability of mechanical connection is susceptible to field conditions and worker operation, large-scale application of cross-linked Polyethylene (PEX) tubing is also inhibited to some extent.

Therefore, the method solves the problem of how to perform physical electric melting (hot melting) connection on the crosslinked Polyethylene (PEX) pipe, and is the key point that the crosslinked Polyethylene (PEX) pipe can exert excellent physical and chemical properties to the maximum extent. At present, no crosslinked polyethylene product capable of being welded is available in the Chinese market.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved is how to provide a pipe connecting piece and a pipe which can be connected by electric melting.

Aiming at the defects in the prior art, the embodiment of the utility model provides the pipe connecting piece and the pipe which can be connected by electric melting, so that the stability and the reliability of a system are improved, and the cost of the system is reduced.

In a first aspect, an embodiment of the present invention provides a pipe connector capable of being connected by electric smelting, including:

the pipe connecting piece body is connected with a pipe to form a pipeline and comprises at least one connecting end part, the connecting end part is provided with a pipe connecting mechanism, the pipe connecting mechanism is provided with an accommodating cavity for accommodating the pipe connecting piece to be connected to be inserted, and the accommodating cavity comprises a connecting inner layer and a connecting outer layer; the connecting inner layer is an electrofusion layer and is used for connecting a pipe to be connected;

an electric melting heating wire is arranged between the inner connecting layer and the outer connecting layer, and the electric melting heating wire is heated after being electrified to melt the inner connecting layer and be in sealing connection with the pipe to be connected;

the connection terminal of the electric melting electric heating wire extends to the outside of the pipe connection piece body.

In other embodiments provided by the pipe connector described herein, the outer connecting layer is a crosslinked polyethylene layer.

In other embodiments provided by the pipe connector described herein, the crosslinked polyethylene layer is formed from a polyethylene resin having a weight ratio of 20: 1 and a crosslinking agent.

In other embodiments of the pipe connector described in this specification, the connecting inner layer is an electrofusion structure layer.

In other embodiments provided by the pipe connector described in the present specification, the electrofused structural layer is formed by mixing low-density polyethylene, an antioxidant and a color master.

In other embodiments provided by the pipe coupling described herein, the weight ratio of the low density polyethylene, the antioxidant, and the color concentrate is 100: 3: 1.

in other embodiments provided by the pipe connector described herein, the outer layer of the connector is provided with a viewing aperture.

In other embodiments provided by the pipe connector described herein, the thickness of the inner layer of the connector is 0.29-0.4 mm.

In other embodiments provided by the pipe connecting member described in this specification, the distance between the outer side of the electric melting heating wire and the outer side of the pipe connecting mechanism is 6-8 mm.

In a second aspect, an embodiment of the present invention further provides a pipe capable of being connected by electrofusion, which is used to connect a pipeline by a pipe connecting piece capable of being connected by electrofusion, and the pipe includes a pipe inner layer and a pipe outer layer; the outer layer of the pipe is an electric melting layer and is used for being connected with the pipe connecting piece into a pipeline after electric melting;

an electric melting heating wire is arranged in the pipe connecting piece, and the electric melting heating wire is heated after being electrified to melt the outer layer of the pipe and is connected with the pipe connecting piece.

In other embodiments provided by the pipe described herein, the inner layer of the pipe is a crosslinked polyethylene layer.

In other embodiments provided by the pipe described herein, the crosslinked polyethylene layer is formed from a polyethylene composition comprising, by weight, 20: 1 and a crosslinking agent.

In other embodiments provided by the pipe described in the present specification, the outer layer of the pipe is an electrofused structural layer.

In other embodiments provided by the pipe described in the present specification, the electrofused structural layer is formed by blending low-density polyethylene, the antioxidant and the color masterbatch.

In other embodiments provided by the pipe described herein, the weight ratio of the low density polyethylene, the antioxidant, and the color concentrate is 100: 3: 1.

in other embodiments provided by the tubing described herein, the outer layer has a thickness of 0.19 to 0.3 mm.

According to the technical scheme, the pipe which is matched with the pipe connecting piece and can be connected in an electric smelting mode is inserted into the pipe connecting piece through the double-layer pipe connecting piece and the double-layer pipe which can be connected in the electric smelting mode, voltage is loaded on the connecting terminal of the pipe connecting piece, the electric smelting electric heating wire is enabled to generate heat, the electric smelting layers of the outer wall of the pipe and the inner wall of the pipe connecting piece are heated, raw materials of the outer layer of the pipe and the inner layer of the pipe connecting piece are enabled to reach a molten state, the pipe and the pipe connecting piece are connected in the molten state to be integrated after cooling, and sealing connection of the pipe and the pipe connecting piece is completed. By the mode, the problem that the cross-linked Polyethylene (PEX) pipes cannot be connected in an electric melting mode is solved ingeniously, the pipe co-extrusion technology and the double-layer pipe structure are utilized, the pipe performance is not affected, the problem of the electric melting connection of the cross-linked Polyethylene (PEX) pipes is solved, and the technical guarantee is provided for the wider application of the cross-linked Polyethylene (PEX) pipes. The pipe with superior performance in the cross-linked Polyethylene (PEX) plastic pipe can be better applied to more fields, the stability and the reliability of the system are greatly improved, and the system cost is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below of the drawings required for the description of the embodiments or the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural view of a pipe connecting member capable of electric smelting connection according to an embodiment of the present invention;

fig. 2 is a schematic sectional structure view of the connection state of the pipe connection member capable of electric smelting connection in the embodiment shown in fig. 1;

fig. 3 is a schematic structural view of an electrofusion-connectable pipe in an embodiment of the present invention;

fig. 4 is a schematic cross-sectional structure diagram of a pipe connection state of an electrofusion connection in one embodiment of the present invention.

Detailed Description

In order to make the objects, 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 drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 and 2, an embodiment of the present invention provides a pipe connector capable of being connected by electrofusion, including: the pipe connecting piece comprises a pipe connecting piece body 1 for connecting pipes to form a pipeline, wherein the pipe connecting piece body 1 comprises at least one connecting end part, the connecting end part is provided with a pipe connecting mechanism, the pipe connecting mechanism is provided with an accommodating chamber 10 for accommodating a pipe 2 to be connected and inserted, and the accommodating chamber 10 comprises a connecting inner layer 11 and a connecting outer layer 12; the connecting inner layer 11 is an electric melting layer, and the connecting inner layer 11 is used for connecting the pipes 2 to be connected; an electric melting heating wire 13 is arranged between the connecting inner layer 11 and the connecting outer layer 12, and the electric melting heating wire 13 is heated after being electrified so as to melt the connecting inner layer 11 and be in sealing connection with the pipe 2 to be connected; the connection terminal 14 of the electric melting heating wire 13 extends to the outside of the pipe connector body 1. The following provides a detailed description of the pipe connecting piece capable of electric smelting connection provided by the embodiment of the utility model.

As shown in fig. 1, the pipe connector provided in the embodiment of the present invention is powered on and then heats the electric melting heating wire 13, so that the outer layer of the pipe and the raw material of the connection inner layer 11 are in a molten state, and the pipe and the pipeline are connected after being cooled and integrated. The pipe connecting piece provided by the embodiment of the utility model can be connected with various matched pipes 2 to be connected. The pipe coupling body 1 may be one coupling end or a plurality of coupling ends, and may be a choke plug for a pipe end when only one coupling end is present. A plurality of connecting end parts can be communicated to form a tee joint or a bend and the like. For another example, two identical connection ends may be provided as an extended connection (straight-through) of the pipeline. Two connecting ends with different diameters can also be used as the switching mechanisms (reducing) of the large and small pipelines.

In the embodiment of the present invention, as shown in fig. 2, in order to effectively ensure the strength of the pipe connection, the connection outer layer 12 is a crosslinked polyethylene layer. The crosslinked polyethylene layer is prepared from a crosslinked polyethylene layer and a crosslinked polyethylene layer, wherein the crosslinked polyethylene layer is prepared from a crosslinked polyethylene material, by weight ratio of 20: 1 and a crosslinking agent. The connection inner layer 11 is a polyethylene material layer, and the polyethylene layer is formed by mixing low-density polyethylene, an antioxidant and color master batches. Optionally, the weight ratio of the low density polyethylene, the antioxidant and the color masterbatch is 100: 3: 1. in order to adapt to pipeline connection with different pipe diameters, the thickness delta of the connecting inner layer 11 is different from 0.29mm to 0.4 mm. The depth D of the connecting inner layer 11 is approximately 22mm-32mm for ensuring the strength of the connecting pipeline.

As shown in fig. 1 and 2, in order to effectively ensure the success rate of pipeline connection during use, the outer connecting layer 12 is provided with an observation hole 100, and the observation hole is communicated with the inner connecting layer 11. After the electric melting heating wire 13 is heated, the connection inner layer 11 is considered to be well connected if the melted material fills the observation hole or overflows from the observation hole 100.

As shown in fig. 2, in the embodiment of the present invention, in the pipe connectors of different types, the electric melting wires 13 are spirally wound between the connection inner layer 11 and the connection outer layer 12, the electric melting heating wires 13 are connected to the connection terminals 14, and the electric melting heating wires 13 of the pipe connectors of different types have different lengths and require different heating times. The inner and outer diameter sizes of different pipe connectors, the depth of the electric melting heating wire 13, the thickness of the inner connecting layer 11 and the electric melting time are different to a certain extent and can be set according to actual needs. For example, the electric melting time can be set between 25s and 50s, and in the embodiment of the utility model, in order to ensure that the electric melting is more sufficient and the sealing performance is ensured when the pipelines are connected, the distance d between the outer side of the electric melting heating wire 13 and the outer side of the pipe connecting mechanism is 6mm to 8 mm.

In order to further embody the advantages of the pipe connecting piece capable of being connected by electric smelting provided by the embodiment of the present invention, as shown in fig. 3 and 4, the embodiment of the present invention further provides a pipe capable of being connected by electric smelting, which is matched with the pipe connecting piece, and is used for connecting pipes by the pipe connecting piece capable of being connected by electric smelting, wherein the pipe 2 includes a pipe inner layer 21 and a pipe outer layer 22; the outer layer 22 of the pipe is an electric melting layer and is used for being hermetically connected with the pipe connecting piece after electric melting to form a pipeline; an electric melting heating wire 13 is arranged in the pipe connecting piece, and the electric melting heating wire 13 is heated after being electrified to melt the outer layer 22 of the pipe and be connected with the pipe connecting piece. The following provides a detailed description of an electrofusion-connectable pipe provided by an embodiment of the present invention.

In the embodiment of the present invention, as shown in fig. 4, the pipe 2 capable of being connected by electric melting and the pipe connecting member capable of being connected by electric melting are matched with each other to connect into a sealed pipeline. When the pipe 2 is connected with the pipe connecting piece in an electric melting mode, the pipe is inserted into the accommodating cavity 10 of the pipe connecting piece, voltage is loaded on the wiring terminal 14 of the pipe connecting piece, the electric melting heating wire 13 is made to generate heat, the electric melting layer of the inner layer 11 and the outer layer 22 of the pipe is connected in a heating mode, and the pipe 2 and the pipe connecting piece are connected into a whole through the electric melting layer connected with the inner layer 11 and the outer layer 22 of the pipe in a melting mode.

In the present embodiment, as shown in fig. 3 and 4, the inner layer 21 of the pipe is a crosslinked polyethylene layer. The crosslinked polyethylene layer is prepared from a crosslinked polyethylene layer and a crosslinked polyethylene layer, wherein the crosslinked polyethylene layer is prepared from a crosslinked polyethylene material, by weight ratio of 20: 1 and a crosslinking agent. In order to adapt to the connection of pipelines with different pipe diameters, the thickness of the inner layer 21 of the pipe is 1.8mm-3.2 mm.

As shown in fig. 3 and 4, in the embodiment of the present invention, the outer tube layer 22 is an electrofused structural layer, and the electrofused structural layer is formed by mixing low density polyethylene, the antioxidant and the color master. Optionally, the weight ratio of the low density polyethylene, the antioxidant and the color masterbatch is 100: 3: 1. in order to ensure that the electric melting is more sufficient to ensure the sealing property and the firmness of electric melting connection when the pipelines are connected, the thickness delta of the outer layer 22 of the pipe is 0.19mm-0.3 mm.

As shown in fig. 3 and 4, in the embodiment of the present invention, the pipe capable of being connected by electrofusion is formed by adopting a double-layer pipe structure of an inner pipe layer 21 and an outer pipe layer 22, and a pipe co-extrusion technique is used to form a double-layer structure of a cross-linked Polyethylene (PEX) pipe, that is, an electrofusion layer is co-extruded on the outer side of the cross-linked Polyethylene (PEX) layer, where the electrofusion layer is also a polyethylene material. The pipe extrusion must use extrusion equipment with a co-extrusion machine head, the inner layer raw material and the outer layer raw material are respectively mixed in proportion, and then the pipe which has a double-layer structure and can be connected by electric smelting is produced through the co-extrusion machine head.

As shown in fig. 1, when the pipes which can be connected by electrofusion and are matched with the pipe connecting pieces which can be connected by electrofusion are connected by electrofusion, the pipes are inserted into the pipe connecting pieces, voltage is loaded on the connecting terminals of the pipe connecting pieces, so that the electrofusion heating wires generate heat, and the outer walls of the pipes and the electrofusion layer of the connecting inner wall of the pipe connecting pieces are heated, so that the pipes and the pipe connecting pieces are connected into a whole by fusion of the electrofusion layer. The electric melting adopts a special electric melting machine which runs fully automatically, and the model can be automatically judged according to the resistance wire of the pipe connecting piece, so that the electric melting time is automatically set. The whole process does not need human intervention, and the electric melting quality is ensured.

In summary, according to the pipe fitting provided by the embodiment of the present invention, the pipe fitting and the double-layer pipe fitting are inserted into the pipe fitting, and a voltage is applied to the terminal of the pipe fitting, so that the electric heating wire generates heat to heat the electric melting layer on the outer wall of the pipe fitting and the inner wall of the pipe fitting, so that the raw materials of the outer layer of the pipe fitting and the inner layer of the pipe fitting reach a molten state, and after cooling, the pipe fitting and the pipe fitting are fused and combined into a whole, thereby completing the sealing connection between the pipe fitting and the pipe fitting. By the mode, the problem that the cross-linked Polyethylene (PEX) pipes cannot be connected in an electric melting mode is solved ingeniously, the pipe co-extrusion technology and the double-layer pipe structure are utilized, the pipe performance is not affected, the problem of the electric melting connection of the cross-linked Polyethylene (PEX) pipes is solved, and the technical guarantee is provided for the wider application of the cross-linked Polyethylene (PEX) pipes. The pipe with superior performance in the cross-linked Polyethylene (PEX) plastic pipe can be better applied to more fields, the stability and the reliability of the system are greatly improved, and the system cost is reduced.

Finally, it should be noted that in the description of the present invention, it is to be understood that the terms "central", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of describing and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

Moreover, relational terms such as "first," "second," and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions or without necessarily requiring or implying any relative importance or implying any particular order among or between such entities or actions. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly, as they may be, for example, fixedly connected, detachably connected, or integrally connected; either mechanically or electrically or in communication with each other; either directly or indirectly through intervening media, or may be in a communicating relationship between the two elements unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the utility model may be practiced without these specific details. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description. Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the utility model, various features of the utility model are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the utility model as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. It should be noted that the specific features, structures, materials or characteristics described in the embodiments and examples of the present application may be combined with each other without conflict or contradiction. The present invention is not limited to any single aspect, nor is it limited to any single embodiment, nor is it limited to any combination and/or permutation of these aspects and/or embodiments. Moreover, each aspect and/or embodiment of the utility model can be utilized independently or in combination with one or more other aspects and/or embodiments thereof by one of ordinary skill in the art without contradiction.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims

1. A pipe connection element capable of electrofusion coupling, comprising:

2. The pipe coupling according to claim 1, wherein the coupling outer layer is a crosslinked polyethylene layer.

3. A pipe coupling according to claim 1, wherein said coupling inner layer is an electrofusion structure layer.

4. The pipe coupling according to claim 1, wherein the coupling outer layer is provided with a viewing aperture.

5. The pipe coupling according to claim 1, wherein the coupling inner layer has a thickness of 0.29-0.4 mm.

6. The pipe connecting piece according to claim 1, wherein the distance between the outer side of the electric melting heating wire and the outer side of the pipe connecting mechanism is 6-8 mm.

7. The pipe capable of being connected by electric smelting is characterized by being used for being connected into a pipeline through a pipe connecting piece capable of being connected by electric smelting, and the pipe comprises a pipe inner layer and a pipe outer layer; the outer layer of the pipe is an electric melting layer and is used for being connected with the pipe connecting piece into a pipeline after electric melting;

8. The pipe of claim 7 wherein the inner pipe layer is a crosslinked polyethylene layer.

9. The pipe of claim 7, wherein the outer layer of the pipe is an electrofused structural layer.

10. The pipe of claim 7 wherein the outer layer of the pipe has a thickness of 0.19 to 0.3 mm.