CN211649358U - Prevent leaking copper and mould pipe fitting - Google Patents

Abstract

The utility model discloses a leakage-proof copper plastic pipe fitting, which comprises a copper insert and a plastic layer, wherein a plurality of circles of parallel regular trapezoidal grooves are arranged on the outer annular wall of the copper insert at intervals, a circle of inverted triangular groove is arranged on a bulge part between each regular trapezoidal groove, and the groove depth of each regular trapezoidal groove is greater than that of each inverted triangular groove; the plastic layer is wrapped outside the copper insert through an injection molding process. The utility model discloses designed many rings of positive trapezoidal grooves and inverted triangle groove on the outer wall of copper mold insert, through the combined action in these two kinds of grooves, ensured that copper mold insert and plastic layer still can be firm closely link up under the pressurized condition, avoided the two relative motion to appear in axial and radial direction, prevent that the pipe fitting from appearing leaking if accidents such as pressure release, water, bubbling.

Description

Prevent leaking copper and mould pipe fitting

Technical Field

The utility model relates to a water delivery tubular product field especially relates to a prevent leaking copper and mould pipe fitting.

Background

The copper-plastic pipe fitting is generally formed by injection molding of a plastic main body and a copper insert with screw threads in PP-R, PVC and PE pipes, and has the characteristics of light weight, corrosion resistance, no scaling, long service life and the like. At present, in the commercially available and used PPR pipe fittings, a part of threads of the products are connected by adopting a copper insert, and the copper insert is placed on a mould of an injection molding machine during production and then is injection molded with a pipe fitting main body. When the product is used for a hot water pipeline, because the hot water temperature is higher or the pressure is overlarge sometimes, and the thermal expansion coefficients of copper and plastic materials are greatly different, the plastic coated outside the product is easy to expand by heating and finally deform. After repeated heating and cooling circulation, the copper insert inside is separated from the pipe fitting main body, and the phenomenon of falling off occurs, so that leakage is generated. Once leakage occurs, the user loses a lot.

Therefore, how to overcome the above-mentioned defects of the copper-plastic pipe in the using process is a subject of intensive research needed by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model aims to provide a copper mold insert and plastic layer are fixed effectual, and the difficult leak protection copper that takes place to leak moulds the pipe fitting, and its concrete technical scheme is as follows:

the leakage-proof copper-plastic pipe fitting comprises a copper insert and a plastic layer, wherein a plurality of circles of parallel regular trapezoidal grooves are arranged on the outer ring wall of the copper insert at intervals, a circle of inverted triangular groove is formed in each protruding part between every two adjacent regular trapezoidal grooves, and the depth of each regular trapezoidal groove is larger than that of each inverted triangular groove; the plastic layer is wrapped outside the copper insert through an injection molding process.

The utility model discloses a fluting on the copper mold insert outer wall of pipe fitting is moulded to copper, makes the plastic layer can stretch into the inslot portion and laminate with the copper mold insert outer wall at the in-process of moulding plastics, and therefore, the recess on the inboard arch of plastic layer and the copper mold insert outer wall is fixed at the axial direction of pipe fitting, has further strengthened copper mold insert and plastic layer at the ascending location of axial, makes the two can not produce the axial relative motion.

And simultaneously, the utility model discloses be positive dovetail groove and inverted triangle groove with the recess design on the copper mold insert outer wall to the groove depth in positive dovetail groove is greater than the groove depth in inverted triangle groove, and the purpose of doing so is: when the flow rate of liquid or gas in the pipeline is larger or the flow is larger (namely, when the pressure bearing of the pipeline is larger), the plastic layer is continuously embedded into the regular trapezoidal groove on the copper insert, so that the connection between the copper insert and the plastic layer is tighter, and the relative motion is less likely to occur in the axial direction and the radial direction; when the flow rate of the liquid in the pipeline is normal, the inverse triangular groove on the copper insert can ensure the tightness of the connection between the copper insert and the plastic layer.

Therefore, the utility model provides a regular trapezoid groove and inverted triangle groove are through perfect adaptation, have further ensured that copper mold insert and plastic layer still can be firm closely linking up under the pressurized condition, avoid the two relative motion to appear in axial and radial direction, prevent that the pipe fitting from appearing leaking if accidents such as pressure release, water bleeding, bubbling.

On the basis of the technical scheme, the utility model discloses still can make following improvement:

preferably, the end part of the inner wall of the copper insert is provided with an internal thread so as to be connected with other external pipe fittings.

Preferably, the surrounding directions of the regular trapezoid-shaped groove and the inverted triangle-shaped groove are perpendicular to the axial direction of the copper-plastic pipe fitting, so that the groove is convenient to process, the acting forces of corresponding positions in the groove at the same time are ensured to be the same, and the stability of the integral structure of the copper-plastic pipe fitting is ensured.

Preferably, the regular trapezoid-shaped groove and the inverted triangle-shaped groove are uniformly distributed on the outer wall of the copper insert, so that the uniform stress of the copper insert and the plastic layer is ensured, and the service life of the plastic layer is further prolonged.

Preferably, the copper plastic pipe fitting is any one of a straight pipe fitting, a joint pipe fitting, an elbow pipe fitting, a tee pipe fitting, a four-way pipe fitting and a reducing pipe fitting.

The utility model discloses technical scheme can use in different types of copper plastic pipe fittings, prevents that the pipe fitting from appearing leaking (like pressure release, water, bubbling etc.) accident because of the relative motion of copper mold insert and plastic layer.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic diagram of the overall structure of the present invention.

Figure 2 attached drawing is the utility model discloses overall structure's frontal cutaway.

Fig. 3 is a schematic structural diagram of a copper insert in one section of the present invention.

Figure 4 the accompanying drawing is a front cross-sectional view of figure 3.

Wherein, in the figure,

1-copper insert, 2-plastic layer, 3-regular trapezoidal groove, 4-inverted triangular groove and 5-internal thread.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and 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 therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example (b):

a leak-proof copper-plastic pipe fitting according to an embodiment of the present invention is described in detail below with reference to fig. 1 to 4.

As shown in fig. 1-4, the embodiment of the utility model discloses a leakage-proof copper plastic pipe fitting, which is an elbow pipe fitting and comprises a copper insert 1 and a plastic layer 2, wherein a plurality of circles of parallel regular trapezoidal grooves 3 are arranged on the outer ring wall of the copper insert 1 at intervals, a circle of inverted triangular groove 4 is respectively arranged on the convex part between each regular trapezoidal groove 3, and the groove depth of each regular trapezoidal groove 3 is greater than that of each inverted triangular groove 4; the plastic layer 2 is wrapped outside the copper insert 1 through an injection molding process, and the end part of the inner wall of the copper insert 1 is provided with an internal thread 5 which is convenient to be connected with other pipe fittings.

The plastic layer 2 can be made of PP-R material, PE material and PVC material.

In order to further optimize the technical scheme of the embodiment, the surrounding directions of the regular trapezoidal grooves 3 and the inverted triangular grooves 4 are perpendicular to the axial direction of the copper-plastic pipe fitting, and the regular trapezoidal grooves 3 and the inverted triangular grooves 4 are uniformly distributed on the outer wall of the copper insert 1.

The utility model provides a during the pipe fitting commonly used such as straight tube pipe fitting, joint pipe fitting, elbow pipe fitting, tee bend pipe fitting, four-way pipe fitting, reducing pipe fitting can be applied to the copper pipe fitting structure, here no longer enumerates one by one to the type of pipe fitting.

When the copper-plastic pipe is subjected to large pressure due to overlarge liquid flow or overhigh flow velocity, the regular trapezoidal groove 3 on the outer wall of the copper insert 1 is in increasingly close connection with the plastic layer 2 due to the increase of the pressure; when the pressure in the copper-plastic pipe fitting is normal, the inverted triangular groove 4 on the outer wall of the copper insert 1 plays a main connecting role. Therefore, the utility model discloses a perfect adaptation of positive trapezoidal groove 3 of 1 outer wall of copper mold insert and inverted triangle groove 4 has effectually reduced the problem of pipe fitting pressure release, water bleeding, gassing.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (5)

1. The anti-leakage copper plastic pipe fitting comprises a copper insert (1) and a plastic layer (2), and is characterized in that a plurality of circles of parallel regular trapezoidal grooves (3) are formed in the outer annular wall of the copper insert (1) at intervals, a circle of inverted triangular groove (4) is formed in a protruding part between every two adjacent regular trapezoidal grooves (3), and the depth of each regular trapezoidal groove (3) is greater than that of each inverted triangular groove (4); the plastic layer (2) is wrapped outside the copper insert (1) through an injection molding process.

2. A leak-proof brass-plastic pipe according to claim 1, characterized in that the end of the inner wall of the copper insert (1) is provided with an internal thread (5).

3. A leak-proof brass-plastic pipe according to claim 1, characterized in that the surrounding directions of said regular trapezoidal groove (3) and said inverted triangular groove (4) are perpendicular to the axial direction of the brass-plastic pipe.

4. A leak-proof brass-plastic pipe according to claim 1 or 3, characterized in that said regular trapezoidal grooves (3) and said inverted triangular grooves (4) are uniformly distributed on the outer wall of said copper insert (1).

5. A leak-proof brass-plastic pipe as recited in claim 1, wherein said brass-plastic pipe is any one of a straight pipe, a fitting, an elbow, a tee, a reducer.

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