A new type of grooved plastic-lined composite pipe

Abstract

The utility model discloses a novel groove-lined plastic composite pipe, comprising a metal pipe body and a plastic liner arranged in the metal pipe body, wherein the plastic liner has a port corresponding to the metal pipe body, and the plastic liner is provided with a flange at the port to cover the port of the metal pipe body. The utility model covers the port of the metal pipe body by the flange, thereby shielding the gap between the fitting surface of the plastic liner and the metal pipe body, thereby completely avoiding water infiltration, avoiding corrosion of the metal pipe body, and being conducive to extending the service life of the composite pipe.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic-lined composite pipes, in particular to a novel grooved plastic-lined composite pipe. Background Art

[0002] Plastic-lined composite pipe is a pipe that uses plastic pipe as the lining material and is compounded with steel pipe through a specific process. It has the advantages of both the corrosion resistance of plastic pipe and the strength of carbon steel pipe.

[0003] In the grooved plastic-lined composite pipe of the prior art, the plastic lining is flush with the end of the steel pipe, resulting in the exposure of the connecting surface between the plastic lining and the steel pipe. Therefore, in actual use, water will penetrate from the gap between the fitting surface between the plastic lining and the steel pipe, thereby causing corrosion of the steel pipe. After working for a long time, leakage will occur, shortening the service life of the composite pipe.

[0004] Therefore, how to solve the defects of the above-mentioned prior art has become the direction of efforts of technicians in this field. Utility Model Content

[0005] The purpose of the utility model is to provide a novel groove-lined plastic composite pipe, which can completely solve the deficiencies of the above-mentioned prior art.

[0006] The purpose of the utility model is achieved through the following technical solutions:

[0007] A novel grooved plastic-lined composite pipe comprises a metal pipe body and a plastic liner arranged in the metal pipe body. The plastic liner has a port corresponding to the metal pipe body, and the plastic liner is provided with a flange covering the port of the metal pipe body at the port.

[0008] Preferably, the flange includes a port portion and a folded portion, the port portion is in close contact with the end surface of the port of the metal tube body, the folded portion is vertically connected to the port portion, and the folded portion is in close contact with the outer wall of the port of the metal tube body.

[0009] Preferably, the metal pipe body is any one of a straight pipe, a three-way pipe, a 90° elbow pipe or a 45° elbow pipe.

[0010] Preferably, the outer wall of the metal tube is coated with a high-chlorinated polyethylene coating layer and an alkyd iron red paint layer in sequence from the inside to the outside.

[0011] Preferably, a first rubber sealing ring is bonded to the inner wall of one end of the plastic liner, a connecting pipe is fixed to the inner wall of the other end, and a second rubber sealing ring is sleeved and fixed on the connecting pipe.

[0012] Preferably, two adjacent grooved plastic-lined composite pipes are connected by a flange, at which time the connecting pipe is inserted into the adjacent composite pipe, the first rubber sealing ring fits tightly at the end of the connecting pipe, and the outer wall of the second rubber sealing ring is in close contact with the inner wall of the plastic lining of the adjacent composite pipe.

[0013] Compared with the prior art, the beneficial effects of the utility model are: simple structure, reasonable design, and the port of the metal pipe body is covered by the flange to block the gap between the fitting surface of the plastic lining and the metal pipe body, thereby completely avoiding water infiltration and corrosion of the metal pipe body, which is beneficial to extending the service life of the composite pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the second embodiment of the present utility model. DETAILED DESCRIPTION

[0016] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0017] Embodiment 1

[0018] like Figure 1 As shown, a new type of grooved plastic-lined composite pipe includes a metal pipe body 1 and a plastic liner 2 arranged in the metal pipe body 1, wherein the plastic liner 2 has a port corresponding to the metal pipe body 1, and the plastic liner 2 is provided with a flange 3 at the port to cover the port of the metal pipe body 1.

[0019] In this embodiment, the flange 3 includes a port portion 31 and a folded portion 32 . The port portion 31 is in close contact with the end surface of the port of the metal tube body 1 . The folded portion 32 is vertically connected to the port portion 31 . The folded portion 31 is in close contact with the outer wall of the port of the metal tube body 1 .

[0020] The metal tube body 1 is any one of a straight tube, a three-way tube, a 90° elbow tube or a 45° elbow tube. In this embodiment, a straight tube is preferred.

[0021] The utility model covers the port of the metal pipe body 1 by the flange 3, thereby shielding the gap between the fitting surface of the plastic liner 2 and the metal pipe body 1, thereby completely preventing water from penetrating and preventing the metal pipe body 1 from being corroded, which is beneficial to prolonging the service life of the composite pipe.

[0022] Embodiment 2

[0023] like Figure 2 As shown, the difference between this embodiment and the first embodiment is that the outer wall of the metal pipe body 1 is coated with a high chlorinated polyethylene coating layer and an alkyd iron red paint layer from the inside to the outside in sequence. The high chlorinated polyethylene coating layer and the alkyd iron red paint layer can improve the corrosion resistance of the metal pipe fittings.

[0024] In this embodiment, a first rubber seal ring 4 is bonded to the inner wall of one end of the plastic liner 2, and a connecting pipe 5 is fixed to the inner wall of the other end, and a second rubber seal ring 6 is fixed on the connecting pipe 5. Two adjacent grooved plastic-lined composite pipes are connected by flange 7. At this time, the connecting pipe 5 is inserted into the adjacent composite pipe, the first rubber seal ring 4 is tightly fitted at the end of the connecting pipe 5, and the outer wall of the second rubber seal ring 6 is close to the inner wall of the plastic liner 2 of the adjacent composite pipe. There is a gap between the first rubber seal ring 4 and the second rubber seal ring 6.

[0025] The connecting pipe 5 includes a fixed pipe 51 and an inserting pipe 52 . The fixed pipe 51 and the inserting pipe 52 are connected as a whole via a tapered transition pipe 53 . The diameter of the fixed pipe 51 is larger than that of the inserting pipe 52 .

[0026] Through the cooperation of the connecting pipe 5, the first rubber sealing ring 4 and the second rubber sealing ring 6, the connection of the composite pipe can be effectively sealed to prevent leakage at the connection of the composite pipe and improve the sealing performance of the connection of the composite pipe.

[0027] Similarly, it should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various utility model aspects, in the above description of the exemplary embodiments of the utility model, the various features of the utility model are sometimes grouped together into a single embodiment, figure, or description thereof. However, the disclosed method should not be interpreted as reflecting the following intention: the claimed utility model requires more features than the features explicitly stated in each claim. More specifically, as reflected in the following claims, the utility model aspects are less than all the features of the single embodiment disclosed above. Therefore, the claims following the specific embodiment are hereby expressly incorporated into the specific embodiment, wherein each claim itself serves as a separate embodiment of the utility model.

[0028] Those skilled in the art will appreciate that the modules in the devices in the embodiments may be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments may be combined into one module or unit or component, and in addition they may be divided into a plurality of submodules or subunits or subcomponents. Except that at least some of such features and / or processes or units are mutually exclusive, all features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this manner may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0029] In addition, those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims below, any one of the claimed embodiments may be used in any combination.

[0030] It should be noted that the above embodiments illustrate the utility model rather than limit the utility model, and those skilled in the art can design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets should not be constructed as a limitation to the claims. The word "comprising" does not exclude the existence of elements or steps not listed in the claims. The word "one" or "an" before an element does not exclude the existence of multiple such elements. The utility model can be implemented by means of hardware including several different elements and by means of appropriately programmed computers. In a unit claim that lists several devices, several of these devices can be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words can be interpreted as names.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel grooved plastic-lined composite pipe, comprising a metal pipe body and a plastic liner arranged in the metal pipe body, characterized in that: The plastic liner has a port corresponding to the metal tube body, at which the plastic liner is provided with a flange covering the port of the metal tube body, a first rubber sealing ring is bonded to the inner wall of one end of the plastic liner, a connecting pipe is fixed to the inner wall of the other end, and a second rubber sealing ring is fixed on the connecting pipe.

2. The novel grooved plastic-lined composite pipe according to claim 1 is characterized in that: The flange includes a port portion and a folding portion, wherein the port portion is in close contact with the end surface of the port of the metal tube body, the folding portion is vertically connected to the port portion, and the folding portion is in close contact with the outer wall of the port of the metal tube body.

3. The novel grooved plastic-lined composite pipe according to claim 1 is characterized in that: The metal pipe body is any one of a straight pipe, a three-way pipe, a 90° elbow pipe or a 45° elbow pipe.

4. The novel grooved plastic-lined composite pipe according to claim 2 or 3, characterized in that: The outer wall of the metal pipe body is coated with a high-chlorinated polyethylene coating layer and an alkyd iron red paint layer in sequence from the inside to the outside.

5. The novel grooved plastic-lined composite pipe according to claim 4 is characterized in that: Two adjacent grooved plastic-lined composite pipes are connected by flanges. At this time, the connecting pipe is inserted into the adjacent composite pipes, the first rubber sealing ring is tightly fitted at the end of the connecting pipe, and the outer wall of the second rubber sealing ring is tightly attached to the inner wall of the plastic lining of the adjacent composite pipe.

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