CN201137778Y - A sealing joint for connecting hoses - Google Patents

Abstract

A sealing joint for connecting hoses, characterized in that: the sealing joint for connecting hoses includes a joint nut (1) and a hose connecting body (2), one end of the hose connecting body (2) It has an internal thread connected to the hard pipe, and the other end has an external thread connected to the joint nut (1), the joint nut (1) has internal threads, the joint nut (1) and the hose connection body (2 ) when tightened and installed, the gap between them can clamp one end of the hose (3) to be connected. Simple structure, easy installation, avoiding the inconvenience of traditional flange, adhesive and welding connections. When using corrosion-resistant plastic materials, it is resistant to strong corrosive liquids, such as strong acids, strong alkalis, strong oxidizing substances, and is also particularly resistant to electrochemical corrosion. It overcomes the problem of thermal expansion and cold contraction when non-metallic pipelines are rigidly connected.

Description

A sealing joint for connecting hoses

technical field

The utility model relates to the mechanical field, in particular providing a sealing joint for connecting flexible pipes.

Background technique

In liquid pipelines, the connection methods commonly used between hard pipes such as metal and plastic mainly include: flange type, adhesive type and welding type. The connection between the hard pipe and the flexible pipe is mostly to use a metal pipe clamp to fasten the flexible pipe on the hard pipe, and the mechanical diameter reduction of the pipe clamp is used to deform the flexible pipe to achieve the sealing between the flexible pipe and the hard pipe. Plastic pipe fittings are often used in corrosive media, such as strong acid, strong alkali, or strong oxidizing substances. If a metal pipe clamp is used to connect the hose and the hard pipe at this time, the corrosive gas in the environment or the leakage of the pipeline will easily cause corrosion of the pipe clamp, so there is a potential safety hazard.

Utility model content

The purpose of the utility model is to provide a sealing joint for connecting hoses that prevents corrosion of pipe collars.

A sealing joint for connecting hoses, characterized in that: the sealing joint for connecting hoses includes a joint nut (1) and a hose connecting body (2), one end of the hose connecting body (2) It has an internal thread connected to the hard pipe, and the other end has an external thread connected to the joint nut (1), the joint nut (1) has internal threads, the joint nut (1) and the hose connection body (2 ) when tightened and installed, the gap between them can clamp one end of the hose (3) to be connected.

The hose connection body (2) is a cylindrical pipe fitting.

One end of the hose connection body (2) is provided with an annular protrusion, which is integrated with the cylindrical pipe fitting, and its diameter is slightly larger than the inner diameter of the hose (3) to be connected.

The difference between the middle diameter of the external thread in the hose connection main body (2) and the outer diameter of the annular protrusion is smaller than the thickness of the tube wall of the hose (3) to be connected.

When used to connect the hose, first put the hose on the hose joint part of the hose connection body, and then gradually tighten the joint nut (1) onto the external thread of the hose joint part. Since the diameter difference between the external thread of the hose joint and the ring-shaped protrusion is smaller than the thickness of the hose wall, the hose (3) is in close contact with the ring-shaped protrusion on the hose joint to form a tight seal during the gradual tightening process. .

Advantage of the utility model:

Simple structure, easy installation, avoiding the inconvenience of traditional flange, adhesive and welding connections. When using corrosion-resistant plastic materials, it is resistant to strong corrosive liquids, such as strong acids, strong alkalis, strong oxidizing substances, and is also particularly resistant to electrochemical corrosion. It overcomes the problem of thermal expansion and cold contraction when non-metallic pipelines are rigidly connected.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:

Figure 1 is a cross-sectional view of the main body of the hose connection;

Fig. 2 is a joint nut figure;

Figure 3 is a structural diagram of the main body of the hose connection;

Figure 4 is an assembly diagram of the sealing joint.

Detailed ways

Example 1

This example introduces a sealing joint for connecting hoses φ26×3. The main components are the joint nut (1) and the hose connecting body (2). One end of the hose connecting body (2) has The internal thread M18×2, the other end has an external thread M25×1.5 connected with the joint nut (1), and the joint nut (1) has an internal thread M25×1.5. One end of the hose connection body (2) gradually changes from φ21 to φ23 to form an annular protrusion integrated with the cylindrical pipe fitting. When connecting the hose, first put the hose on the hose joint part of the hose connection body, and then gradually tighten the joint nut (1) onto the external thread M25×1.5 of the hose joint part. Since the diameter difference between the external thread of the hose joint and the ring-shaped protrusion is smaller than the thickness of the hose wall, the hose (3) is in close contact with the ring-shaped protrusion on the hose joint to form a tight seal during the gradual tightening process. .

Example 2

This example introduces a sealing joint for connecting hoses φ42×5. The main components are the joint nut (1) and the hose connecting body (2). One end of the hose connecting body (2) has It is used for socket bonding with pipe fittings, the other end has an external thread M47×2 connected with the joint nut (1), and the joint nut (1) has an internal thread M47×2. One end of the hose connection body (2) gradually changes from φ31 to φ36 to form an annular protrusion integrated with the cylindrical pipe fitting. When connecting the hose, first put the hose on the hose joint part of the hose connection body, and then gradually tighten the joint nut (1) onto the external thread M47×2 of the hose joint part. Since the diameter difference between the external thread of the hose joint and the ring-shaped protrusion is smaller than the thickness of the hose wall, the hose (3) is in close contact with the ring-shaped protrusion on the hose joint to form a tight seal during the gradual tightening process. .

Claims (4)

1, a kind of SEALING FITTING that is used to connect flexible pipe, it is characterized in that: the described SEALING FITTING that is used to connect flexible pipe comprises that collar nut (1) is connected main body (2) with flexible pipe, flexible pipe connects main body (2) one ends and has the internal thread that is connected with hard tube, the other end has the outside thread that is connected with collar nut (1), collar nut (1) has internal thread, collar nut (1) is connected main body (2) and screws when installing with flexible pipe, between the slit can clamp an end of the flexible pipe (3) that will connect.

2, according to the described SEALING FITTING that is used to connect flexible pipe of claim 1, it is characterized in that: described flexible pipe connects main body (2) and is cylindrical tube.

3, according to the described SEALING FITTING that is used to connect flexible pipe of claim 1, it is characterized in that: the end that described flexible pipe connects main body (2) has circular protrusion, this circular protrusion and cylinder type pipe fitting are one, and its slightly larger in diameter is in the internal diameter of the flexible pipe that will connect (3).

4, according to the described SEALING FITTING that is used to connect flexible pipe of claim 1, it is characterized in that: described flexible pipe connect in the main body (2) externally threaded in the difference of footpath and the external diameter of circular protrusion less than the thickness of the flexible pipe that will be connected (3) tube wall.

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