Bent pipe type steel-plastic conversion joint

Abstract

The utility model discloses an elbow pipe type steel-plastic conversion joint, which comprises an elbow pipe, joints are welded at two ends of the elbow pipe, each joint comprises a shell, a cavity, external threads and internal threads, the shell is welded at the end part of the elbow pipe, the external threads are arranged on the outer side of the shell, the number of the external threads is multiple, and the internal threads are arranged in the cavity. The diameter of the multiple external threads is sequentially increased from the end, away from the bent pipe, of the shell to the other end of the shell, a cavity is formed in the shell and communicates with the bent pipe, multiple internal threads are formed in the inner wall of the cavity, and the diameter of the multiple internal threads is sequentially decreased from the end, away from the bent pipe, of the shell to the other end of the shell. By means of the connector composed of the shell, the cavity, the external threads and the internal threads, when the connector is applied to adapting of two steel-plastic pipes, adapting of the two steel-plastic pipes with different diameters is facilitated in the mode that the pipeline is connected with the proper external threads or the proper internal threads, impurities in the bent pipe can be cleaned conveniently in the mode that the cover is screwed, and the bent pipe is convenient to clean. And the connected steel-plastic pipe is prevented from being detached.

Description

Technical Field

[0001] The utility model belongs to the technical field of conversion joints, and in particular relates to a curved pipe type steel-plastic conversion joint. Background Art

[0002] Steel-plastic pipe refers to plastic-coated steel pipe, which is a product that uses PE (modified polyethylene) for hot-dip plastic or EP (epoxy resin) for internal and external coating, and has excellent corrosion resistance. At the same time, the coating itself also has good electrical insulation and will not produce electrical corrosion. It has low water absorption, high mechanical strength, and low friction coefficient, and can achieve the purpose of long-term use. It is suitable for the transportation of drainage, seawater, oil, gas and other media. The existing steel-plastic pipe conversion joint and steel-plastic pipe connection methods mainly use threads, grooves, flanges and welding.

[0003] However, when the existing bent-tube steel-plastic conversion joint is used to convert two steel-plastic pipes, the conversion joint can only be adapted to a fixed diameter of the steel-plastic pipe, which is inconvenient for converting two steel-plastic pipes of different diameters. In addition, impurities are easily accumulated in the bent part of the conversion joint, and the connected steel-plastic pipes need to be disassembled for cleaning, which makes it inconvenient to clean the conversion joint. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model provides a curved pipe type steel-plastic conversion joint, which is convenient for converting two steel-plastic pipes with different diameters and convenient for cleaning impurities in the curved pipe.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A curved pipe type steel-plastic conversion joint comprises a curved pipe, both ends of which are welded with joints, the joint comprising a shell, a cavity, an external thread and an internal thread, the shell is welded to the end of the curved pipe, an external thread is provided on the outside of the shell, there are multiple external threads, the diameters of the multiple external threads increase sequentially from the end of the shell away from the curved pipe to the other end, a cavity is provided in the shell, the cavity is connected to the curved pipe, an internal thread is provided on the inner wall of the cavity, there are multiple internal threads, the diameters of the multiple internal threads decrease sequentially from the end of the shell away from the curved pipe to the other end, an opening is provided at the bending part of the curved pipe, and a cover is threadedly connected to the opening of the curved pipe.

[0007] Compared with the prior art, the beneficial effects of the utility model are:

[0008] 1. The joint composed of a shell, a cavity, an external thread and an internal thread is used to transfer two steel-plastic pipes. When the pipes are connected with a suitable external thread or a suitable internal thread, it is convenient to transfer two steel-plastic pipes with different diameters.

[0009] 2. By screwing the cap, it is easy to clean impurities in the bent pipe and avoid disassembling the connected steel-plastic pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the utility model;

[0011] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0012] In the figure: 1. elbow; 2. shell; 3. cavity; 4. external thread; 5. internal thread; 6. cover. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0014] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention. Example

[0015] See attached Figure 1-2 As shown, a curved pipe type steel-plastic conversion joint includes a curved pipe 1, and joints are welded at both ends of the curved pipe 1. The joint includes a shell 2, a cavity 3, an external thread 4 and an internal thread 5. The shell 2 is welded at the end of the curved pipe 1, and an external thread 4 is opened on the outside of the shell 2. There are multiple external threads 4, and the diameters of the multiple external threads 4 increase successively from the end of the shell 2 away from the curved pipe 1 to the other end. A cavity 3 is opened in the shell 2, and the cavity 3 is connected with the curved pipe 1. An internal thread 5 is opened on the inner wall of the cavity 3. There are multiple internal threads 5, and the diameters of the multiple internal threads 5 decrease successively from the end of the shell 2 away from the curved pipe 1 to the other end. An opening is provided at the bending part of the curved pipe 1, and a cover 6 is threadedly connected to the opening of the curved pipe 1.

[0016] Working principle: In the utility model, the left joint of the elbow 1 is the water inlet pipe joint, and the right side is the water outlet pipe joint, and suitable internal and external thread connections are selected. If the diameter of the water inlet pipe is larger and the diameter of the water outlet pipe is smaller, the end of the water inlet pipe is screwed into the external thread 4 on the outside of the joint, and the end of the water outlet pipe is screwed into the internal thread 5 in the joint cavity 3. Screw open the cover 6 to clean the inside of the elbow 1.

[0017] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model, and any figure marks in the claims should not be regarded as limiting the claims involved.

[0018] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A curved pipe type steel-plastic conversion joint, comprising a curved pipe (1), characterized in that: Joints are welded at both ends of the bent pipe (1), and the joints include a shell (2), a cavity (3), an external thread (4), and an internal thread (5). The shell (2) is welded at the end of the bent pipe (1). The outer side of the shell (2) is provided with an external thread (4). There are a plurality of external threads (4), and the diameters of the plurality of external threads (4) increase from the end of the shell (2) away from the bent pipe (1) to the other end. A cavity (3) is provided in the shell (2), and the cavity (3) is communicated with the bent pipe (1). An internal thread (5) is provided on the inner wall of the cavity (3). There are a plurality of internal threads (5), and the diameters of the plurality of internal threads (5) decrease from the end of the shell (2) away from the bent pipe (1) to the other end. An opening is provided at the bend of the bent pipe (1), and a cover (6) is threadedly connected to the opening of the bent pipe (1).

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