Bent pipe core-pulling correction tool

Abstract

The utility model discloses a bend pipe core-pulling correction tool, which comprises a mould assembly and a support assembly, the mould assembly comprises a fixed mould and a movable mould which are matched with each other, the top surface of the fixed mould is provided with a first bend pipe groove, the opening of the first bend pipe groove faces the movable mould, the bottom surface of the movable mould is provided with a second bend pipe groove, and the opening of the second bend pipe groove faces the fixed mould. The first pipe bending groove and the second pipe bending groove define a pipe bending channel, the supporting assembly is arranged in a pipe fitting of a pipe to be bent and comprises a mandrel and a core ball chain, the core ball chain is composed of a plurality of core balls, and the two ends of each core ball are connected with the adjacent core balls in a universal joint mode. One end of the core shaft is connected with a first core ball at the front part of the core ball chain through a universal joint, dents are uniformly distributed on the surface of the core ball, so that the surface of the core ball consists of a spherical platform and the dents, and lubricating oil is coated in the dents. By means of the tool, it is guaranteed that the interior of a pipe fitting is effectively supported when the pipe is bent, friction force between the core ball and the inner wall of the bent pipe is reduced, and the core ball can be taken out conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe bending forming equipment, in particular to a pipe bending core pulling correction tool. Background Art

[0002] The pipe bending process is widely used in various industries. However, the commonly used pipe bending technology has serious defects such as wrinkles and out-of-roundness in the bending part during the pipe bending process. The requirements of gas-insulated power transmission require that the insulation distance from the conductor to the inner wall of the shell is equal. Since the bending part is prone to wrinkles and out-of-roundness, the insulation distance from the conductor to the inner wall of the shell is unequal, resulting in uneven electric field distribution, easy to produce discharge, and affect the power transmission performance of the line. Therefore, the defects of wrinkles and out-of-roundness in the bending part during pipe bending are a problem that needs to be solved urgently.

[0003] The existing Chinese patent "A mandrel for a special-shaped magnesium tube bending machine" has an application number of CN201320547880.5, which provides a mandrel for a tube bending machine. The mandrel connects multiple balls in series through soft steel wires and places them inside the tube to be bent to form internal support when bending the tube. However, this solution has the following disadvantages: 1. The soft steel wires are used to connect the balls, which may easily break the soft steel wires and cause the balls to be blocked in the bent tube; 2. Although the balls are used as the supporting structure inside the bent tube, the supporting effect is better than other shapes, but due to the large contact area between the balls and the inner wall of the bent tube, the friction generated when taking them out is also large, making it inconvenient to take them out.

[0004] Therefore, it is necessary to provide a bending pipe core pulling correction tool to solve the above technical problems. Utility Model Content

[0005] The purpose of the utility model is to provide a curved pipe core pulling correction tool to address the deficiencies in the prior art, thereby strengthening the connection strength between the core balls and reducing the friction between the core balls and the inner wall of the curved pipe while ensuring the supporting effect, thereby facilitating removal.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A pipe bending core pulling correction tool comprises a mold assembly and a support assembly, wherein the mold assembly comprises a fixed mold and a movable mold that are matched with each other, a first pipe bending groove is formed on the top surface of the fixed mold, and the opening of the first pipe bending groove faces the movable mold, a second pipe bending groove is formed on the bottom surface of the movable mold, and the opening of the second pipe bending groove faces the fixed mold, the first pipe bending groove and the second pipe bending groove together form a pipe bending channel, the support assembly is arranged in a pipe fitting to be bent, the support assembly comprises a core shaft and a core ball chain, the core ball chain is composed of a plurality of core balls, both ends of the core balls are respectively connected to adjacent core balls in the form of universal joints, one end of the core shaft is connected to the first core ball at the front of the core ball chain through a universal joint, the surface of the core ball is evenly covered with indentations, so that the surface of the core ball is composed of a spherical platform and indentations, and the indentations are coated with lubricating oil.

[0008] Preferably, the diameter of the core ball is adapted to the inner diameter of the pipe to be bent.

[0009] Preferably, a traction rope is connected to the rear portion of the core ball chain.

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] The core balls are connected by universal joints, which not only ensures that the core ball chain can bend with multiple degrees of freedom during the pipe bending process, but also strengthens the connection strength. The core ball surface is evenly covered with dents, so that the core ball surface is composed of spherical platforms and dents, which reduces the contact area between the core ball surface and the inner wall of the bent pipe and reduces the friction between the two. Before use, the core ball chain is immersed in a lubricating oil barrel to fill and coat the dents with lubricating oil, further reducing friction, so that the support assembly can be removed more conveniently after the pipe bending is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of the utility model when bending a pipe;

[0013] Figure 2 It is a schematic diagram of the structure of the core ball;

[0014] Figure 3 It is a structural diagram of the universal joint;

[0015] Among them, 1-fixed mold, 2-movable mold, 3-pipe fittings, 4-core shaft, 5-core ball chain, 6-core ball, 7-universal joint, 8-dent, 9-spherical platform, 10-traction rope DETAILED DESCRIPTION

[0016] The present invention is further explained below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that these implementation methods are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0017] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixed connection" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0018] In the present invention, the directions or positional relationships indicated by terms such as "upper", "lower", "bottom", "top", etc. are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention. They do not specifically refer to any part or element in the present invention and cannot be understood as limitations on the present invention.

[0019] like Figures 1 to 3 As shown, a pipe bending core pulling correction tool includes a mold assembly and a support assembly, the mold assembly includes a matching fixed mold 1 and a movable mold 2, the top surface of the fixed mold is provided with a first pipe bending groove, the opening of the first pipe bending groove faces the movable mold, the bottom surface of the movable mold is provided with a second pipe bending groove, the opening of the second pipe bending groove faces the fixed mold, the first pipe bending groove and the second pipe bending groove together form a pipe bending channel, the support assembly is installed in a pipe fitting 3 to be bent, the support assembly includes a core shaft 4 and a core ball chain 5, the core ball chain is composed of a plurality of core balls 6, the two ends of the core balls are respectively connected to adjacent core balls in the form of universal joints 7, one end of the core shaft is connected to the first core ball at the front of the core ball chain through a universal joint, the surface of the core ball is evenly covered with indentations 8, so that the surface of the core ball is composed of a spherical platform 9 and indentations, the indentations are coated and filled with lubricating oil, a traction rope 10 is connected to the rear of the core ball chain, and the diameter of the core ball is adapted to the inner diameter of the pipe to be bent.

[0020] The principle and use method of a pipe bending core pulling correction tool: before the pipe bending process, first immerse the core ball chain in a barrel of lubricating oil, or use a brush to dip in lubricating oil, so that the indentations on the surface of the core ball are filled and coated with lubricating oil, and then the traction rope is first inserted into the pipe fitting to be bent, and the entire support assembly is pulled into the pipe fitting by the traction rope until the core ball chain is located at the part of the pipe fitting to be bent, and the pipe fitting is placed in the first pipe bending groove, and the pipe bending machine is started, and the pipe bending action is realized through the cooperation of the movable mold and the fixed mold. The core ball chain forms a support inside the pipe fitting to ensure that the bent part of the pipe fitting will not produce wrinkles and out-of-round defects when bending the pipe. After the pipe bending is completed, the entire support assembly is pulled out by pulling the core shaft.

[0021] The above description shows and describes the preferred embodiments of the utility model. As mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A pipe bending core pulling correction tool, characterized by: The invention comprises a mould assembly and a support assembly, wherein the mould assembly comprises a fixed mould (1) and a movable mould (2) which are matched with each other, wherein a first pipe bending groove is provided on the top surface of the fixed mould, the opening of the first pipe bending groove faces the movable mould, and a second pipe bending groove is provided on the bottom surface of the movable mould, the opening of the second pipe bending groove faces the fixed mould, and the first pipe bending groove and the second pipe bending groove are combined to form a pipe bending channel, wherein the support assembly is arranged in a pipe fitting (3) to be bent, and the support assembly comprises a core shaft (4) and a core ball chain (5), wherein the core ball chain is composed of a plurality of core balls (6), wherein the two ends of the core balls are respectively connected to adjacent core balls in the form of universal joints (7), and one end of the core shaft is connected to the first core ball at the front of the core ball chain through a universal joint, and the surface of the core ball is evenly covered with indentations (8), so that the surface of the core ball is composed of a spherical platform (9) and indentations, and the indentations are coated with lubricating oil.

2. The pipe bending core pulling correction tool according to claim 1, characterized in that: The diameter of the core ball is adapted to the inner diameter of the pipe to be bent.

3. The pipe bending core pulling correction tool according to claim 1, characterized in that: A traction rope (10) is connected to the rear of the core ball chain.

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