CN204345116U - The insert structure of excircle cloth tooth - Google Patents

Abstract

An insert structure with teeth on the outer circumference, including a plastic body and a metal pipe fitting, the plastic body surrounds the outer periphery of the metal pipe fitting, and a plurality of protruding teeth are arranged on the outer periphery of the metal pipe fitting, and any one of the protruding teeth is fitted with the plastic body . Compared with the anti-rotation teeth arranged on the end face in the prior art, the protruding teeth arranged on the outer circumference are farther from the central axis of the metal pipe than the anti-rotation teeth on the end surface of the metal pipe. Therefore, Its force arm against torque is significantly increased; at the same time, more than two rings of convex teeth can be arranged axially on the outer circumference of the metal pipe fitting, which greatly increases the number of convex teeth and can more reliably play an anti-rotation effect. Thereby enhancing the torsion resistance. The protruding teeth are radially embedded in the plastic body, which can prevent axial falling off. The protruding teeth are arranged on the outer periphery of the metal pipe fitting, which can leave more space in the axial direction of the metal pipe fitting, and facilitate the arrangement of the anti-seepage structure.

Description

Insert structure with teeth on the outer circumference

Technical field:

The utility model relates to the field of machinery, in particular to a pipeline connector, in particular to a pipeline connector composed of plastic and metal pipe fittings, in particular to an insert structure with teeth arranged on the outer circumference.

Background technique:

Plastic and metal pipe fittings composite pipe connectors are widely used in water supply pipes, in which the plastic is surrounded by injection molding on the outside of the metal pipe fittings, and the metal pipe fittings have features for mechanical connection, such as threads, to compensate for the creep resistance of plastic materials Defects of poor variable performance and unreliable threaded connection. Metal pipe fittings have requirements for anti-twist and anti-loosening, and if they are used for fluid transportation, there are also requirements for anti-leakage. In the prior art, in order to prevent the relative rotation of the metal pipe fitting and the plastic under the condition of circumferential force, a plurality of anti-rotation teeth are provided along the circumferential direction on the end surface of the metal pipe fitting and the plastic joint. However, the above-mentioned anti-rotation teeth have a limited role in resisting torque, and the number of anti-rotation teeth that can be provided on the end face is limited, therefore, the above-mentioned structure cannot withstand large torques.

Invention content:

The purpose of this utility model is to provide an insert structure of the outer circumference of the teeth. The said insert structure of the outer circumference of the teeth is to solve the problem that the anti-rotation teeth on the end faces of the metal pipe fittings and plastics in the prior art cannot bear the heavy load. Technical problems with high torque.

The insert structure of the outer circumference of the utility model includes a plastic body and a metal pipe fitting, the plastic body surrounds the outer periphery of the metal pipe fitting, wherein the outer periphery of the metal pipe fitting is provided with A plurality of protruding teeth, any one of the protruding teeth is fitted with the plastic body.

Further, the protruding teeth are distributed in a first plane, and the first plane is perpendicular to the axial direction of the metal pipe.

Further, the protruding teeth are distributed in a first plane and at least one second plane, the first plane and the second plane are both perpendicular to the axial direction of the metal pipe, and the first plane and the second plane are along the In the axial arrangement of the pipe parts, the number of protruding teeth located in the first plane and any one of the second planes is more than two.

Further, the outer circumference of the metal pipe fitting is a cylindrical surface, and the protruding teeth are evenly distributed along the circumferential direction.

Further, the outer circumference of the metal pipe is a cylindrical surface, and the protruding teeth are uniformly distributed along the circumferential direction in the first plane and any one of the second planes.

Further, the metal pipe fittings are provided with threads.

The working principle of the utility model is: a plurality of protruding teeth are arranged on the outer circumference of the metal pipe fitting, and when the difference between the diameter and the wall thickness of the metal pipe fitting is less than an order of magnitude, the protruding teeth arranged on the outer periphery are the same as those arranged in the prior art. Compared with the anti-rotation gear on the end face, the distance from the convex tooth on the outer circumference of the metal pipe fitting to the central axis of the metal pipe fitting is greater than the distance from the anti-rotation tooth on the end face of the metal pipe fitting to the central axis of the metal pipe fitting, so the force arm against the torque is significantly increased; at the same time , On the outer circumference of the metal pipe fitting, more than two rounds of protruding teeth can be arranged in the axial direction, which greatly increases the number of protruding teeth, and can play an anti-rotation effect more reliably, thereby enhancing the torsion resistance. The protruding teeth are radially embedded in the plastic body, which can prevent axial falling off. The protruding teeth are arranged on the outer periphery of the metal pipe fitting, which can leave more space in the axial direction of the metal pipe fitting, and facilitate the arrangement of the anti-seepage structure.

Compared with the prior art, the utility model has positive and obvious effects. In the utility model, a plurality of protruding teeth are arranged on the outer circumference of the metal pipe fitting, and when the difference between the diameter and the wall thickness of the metal pipe fitting is less than an order of magnitude, the protruding teeth arranged on the outer periphery are the same as those arranged on the end face in the prior art. Compared with the anti-rotation teeth, the distance from the convex teeth on the outer circumference of the metal pipe fittings to the central axis of the metal pipe fittings is greater than the distance from the anti-rotation teeth on the end face of the metal pipe fittings to the central axis of the metal pipe fittings, so the force arm against torque is significantly increased; The outer circumference of the pipe fitting can be provided with more than two rounds of protruding teeth in the axial direction, which greatly increases the number of protruding teeth, and can more reliably play an anti-rotation effect, thereby enhancing the torsion resistance. The protruding teeth are radially embedded in the plastic body, which can prevent axial falling off. The protruding teeth are arranged on the outer periphery of the metal pipe fitting, which can leave more space in the axial direction of the metal pipe fitting, and facilitate the arrangement of the anti-seepage structure.

Description of drawings:

Fig. 1 is a schematic diagram of the metal pipe fitting in the insert structure of the outer circumference of the utility model.

Fig. 2 is a radial cross-sectional schematic diagram of the insert structure of the outer circumference of the utility model.

Fig. 3 is a schematic axial cross-sectional view along the direction of the arrow in Fig. 2 .

Fig. 4 is a schematic diagram of the insert structure of the outer circumference of the present invention.

Detailed ways:

Example 1:

As shown in Figure 1, Figure 2, Figure 3 and Figure 4, the insert structure of the outer circumference of the utility model includes a plastic body 3 and a metal pipe 1, and the plastic body 3 is surrounded by the The outer periphery of the metal pipe fitting 1 , wherein the outer periphery of the metal pipe fitting 1 is provided with a plurality of protruding teeth 2 , and any one of the protruding teeth 2 is fitted with the plastic body 3 .

Further, the protruding teeth 2 are distributed in a first plane, and the first plane is perpendicular to the axial direction of the metal pipe 1 .

Further, the protruding teeth 2 are distributed in a first plane and at least one second plane, the first plane and the second plane are both perpendicular to the axial direction of the metal pipe 1, the first plane and the second plane Arranged along the axial direction of the metal pipe 1 , the number of protruding teeth 2 located in the first plane and any one of the second planes is more than two.

Further, the outer circumference of the metal pipe fitting 1 is a cylindrical surface, and the protruding teeth 2 are evenly distributed along the circumferential direction.

Further, the outer circumference of the metal pipe 1 is a cylindrical surface, and the protruding teeth 2 are evenly distributed along the circumferential direction in the first plane and any second plane.

Further, the metal pipe fitting 1 is provided with threads.

The working principle of this embodiment is: a plurality of protruding teeth 2 are arranged on the outer periphery of the metal pipe fitting 1, and when the diameter and wall thickness of the metal pipe fitting 1 differ by less than an order of magnitude, the protruding teeth 2 arranged on the outer periphery and the existing Compared with the anti-rotation teeth arranged on the end face in the prior art, the distance from the convex teeth 2 on the outer periphery of the metal pipe fitting 1 to the central axis of the metal pipe fitting 1 is greater than the distance from the anti-rotation teeth on the end face of the metal pipe fitting 1 to the central axis of the metal pipe fitting 1, so it resists torque The effective force arm is significantly increased; at the same time, more than two turns of convex teeth 2 can be arranged axially on the outer circumference of the metal pipe fitting 1, which greatly increases the number of convex teeth 2, and can play an anti-rotation effect more reliably. Thereby enhancing the torsion resistance. The protruding teeth 2 are radially embedded in the plastic body 3, which can prevent axial falling off. The protruding teeth 2 are arranged on the outer periphery of the metal pipe fitting 1, which can reserve more space in the axial direction of the metal pipe fitting 1, and facilitate the arrangement of an anti-seepage structure.

Claims (6)

1. the insert structure of an excircle cloth tooth, comprise a plastic body and a metal pipe element, described plastic body is enclosed in the periphery of described metal pipe element, it is characterized in that: the periphery of described metal pipe element is provided with a plurality of double wedge, and the plastic body of the double wedge described in any one all with described is chimeric.

2. the insert structure of excircle cloth tooth as claimed in claim 1, is characterized in that: described double wedge is distributed in first plane, and the first described plane orthogonal is in the axis of metal pipe element.

3. the insert structure of excircle cloth tooth as claimed in claim 2, it is characterized in that: described double wedge is distributed in first plane and at least one second plane, the first described plane and the second plane are all perpendicular to the axis of metal pipe element, first plane and the second plane are along the axially-aligned of metal pipe element, and the number being arranged in the double wedge of the first plane and any one the second plane is two or more separately.

4. the insert structure of excircle cloth tooth as claimed in claim 2, is characterized in that: the periphery of metal pipe element is cylndrical surface, and described double wedge is circumferentially uniformly distributed.

5. the insert structure of excircle cloth tooth as claimed in claim 3, is characterized in that: the periphery of metal pipe element is cylndrical surface, and described double wedge is circumferentially uniformly distributed separately in the first plane and any one second plane.

6. the insert structure of excircle cloth tooth as claimed in claim 1, is characterized in that: be provided with screw thread in described metal pipe element.