Auxiliary tool for internally-filled bent pipe

Abstract

The utility model discloses an auxiliary tool for an internally-filled bent pipe. The auxiliary tool comprises a fixed support and a movable support. A roller I is mounted on the fixed bracket, one end of the movable bracket is hinged with the fixed bracket, and the center of a hinged pair of the movable bracket and the fixed bracket is the circle center of the roller I; a roller II is mounted on the movable bracket; the rolling wheel I and the rolling wheel II can pivot and are located in the same plane, and grooves with arc-shaped sections are formed in the side faces of the rolling wheel I and the rolling wheel II respectively. The metal pipe bending device is simple in structure, convenient to operate and low in cost, the arc-shaped grooves are formed in the side faces of the rolling wheel I and the rolling wheel II, and when the metal pipe bending device is used, sand is firstly filled into a metal pipe, and then the metal pipe bending device is adopted for bending; and the metal pipe can be effectively prevented from being flattened during pipe bending, and the product quality is guaranteed.

Description

Technical Field

[0001] The utility model relates to an internal pressure-filled pipe bending auxiliary tool. Background Art

[0002] In the bending of metal pipe parts, a large part of the work is to replace and repair the broken oil pipes of the equipment and measure the dimensions on site before bending the pipes. It is difficult to carry special equipment for pipe bending. In actual work, simple tools are used for pipe bending assembly without taking protective measures, resulting in uneven pipe diameters or even flat pipes after bending. Figure 1-2 As shown. Some even have non-circular cross-sections after bending, such as Figure 3-4 As shown, this causes blockage of the liquid flow in the pipe, seriously affecting the normal use of the maintenance equipment. Summary of the Invention

[0003] In order to solve the above technical problems, the utility model provides an internal pressure-filled pipe bending aid which has a simple structure, low cost, is easy to operate, and can prevent metal pipes from flattening during bending.

[0004] The technical solution adopted by the utility model is: an internal pressure bending auxiliary tool, including a fixed bracket and a movable bracket; a roller I is installed on the fixed bracket, one end of the movable bracket is hinged to the fixed bracket, and the center of the hinged pair of the movable bracket and the fixed bracket is the center of the circle of the roller I; a roller II is installed on the movable bracket; the roller I and the roller II can pivot, and the roller I and the roller II are located in the same plane, and the sides of the roller I and the roller II are respectively provided with grooves with arc-shaped cross-sections.

[0005] Furthermore, the radius of the arc-shaped grooves in the cross sections of rollers I and II is the same as the outer diameter of the metal tube.

[0006] Furthermore, the radius of the roller 1 is equal to the radius of the center line of the metal tube after bending.

[0007] Furthermore, the movable bracket includes a hinged portion and an operating handle connecting portion; the hinged portion is provided with a groove, the front end of the groove is hinged to the fixed bracket, and the fixed bracket and roller I are located in the groove; a roller II is installed in the middle of the hinged portion, and roller II is located in the groove.

[0008] Furthermore, a positioning wheel is provided on the fixing bracket; a groove with an arc-shaped cross-section is provided on the side surface of the positioning wheel.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] This utility model has a simple structure and low cost. The sides of rollers I and II are provided with arc-shaped grooves. When using the metal pipe, sand is first poured into the pipe, and then the pipe is bent using the utility model. This effectively prevents the pipe from flattening during bending, ensuring product quality. Furthermore, when using the utility model, the pipe only needs to be placed between rollers I and II, one end of the pipe fixed, and the movable bracket rotated to complete the bending process. This makes the operation convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a diagram of the metal tube structure when the metal tube is bent and flattened.

[0012] Figure 2 yes Figure 1 Middle AA section view.

[0013] Figure 3 This is a diagram of the metal tube structure with an elliptical cross-section produced when the metal tube is bent.

[0014] Figure 4 yes Figure 3 Middle BB cross-section view.

[0015] Figure 5 It is a structural diagram of the present utility model.

[0016] Figure 6 It is a cross-sectional view of the present utility model.

[0017] Figure 7 It is a structural diagram of the movable bracket of the utility model. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] like Figure 5-7 As shown, the present invention includes a fixed bracket 1 and a movable bracket 2. A roller I4 is mounted on the fixed bracket 1 via a pin I3, and roller I4 is capable of pivoting about pin I3. One end of the movable bracket 2 is hinged to the fixed bracket 1 via pin I3 (the center of the hinged connection between the movable bracket 2 and the fixed bracket 1 is the center of roller I). A roller II6 is mounted on the movable bracket 2 via a pin II5; roller II6 is capable of pivoting about pin II5. Rollers I4 and II6 are located in the same plane, and each roller I4 and roller II6 has a groove with an arcuate cross-section on its side. The radius of the arcuate grooves in rollers I4 and II6 is the same as the outer diameter of a metal tube 7. The radius of roller I4 is equal to the radius of the centerline of the bent metal tube. A positioning wheel 7 is mounted on the fixed bracket 1; the side of the positioning wheel 7 has a groove with an arcuate cross-section.

[0020] like Figure 7 As shown, the movable bracket 2 includes a hinge portion 21 and an operating handle connecting portion 22; the hinge portion 21 is provided with a groove 23, the front end of the groove 23 is hinged to the fixed bracket 1, and the fixed bracket 1 and the roller I4 are located in the groove 23. A roller II 6 is installed in the middle of the hinge portion 21, and the roller II 6 is located in the groove.

Claims

1. An internal pressure pipe bending aid, characterized by: It includes a fixed bracket and a movable bracket; a roller I is installed on the fixed bracket, one end of the movable bracket is hinged to the fixed bracket, and the center of the hinged pair of the movable bracket and the fixed bracket is the center of the circle of roller I; a roller II is installed on the movable bracket; rollers I and II can pivot, rollers I and rollers II are located in the same plane, and grooves with arc-shaped cross-sections are respectively provided on the sides of rollers I and rollers II.

2. The internal pressure pipe bending aid according to claim 1, characterized in that: The radius of the arc-shaped grooves in the cross sections of rollers I and II is the same as the outer diameter of the metal tube.

3. The internal pressure pipe bending aid according to claim 1, characterized in that: The radius of the roller 1 is equal to the radius of the center line of the metal tube after bending.

4. The internal pressure pipe bending aid according to claim 1, characterized in that: The movable bracket includes a hinge part and an operating handle connecting part; the hinge part is provided with a groove, the front end of the groove is hinged to the fixed bracket, and the fixed bracket and roller I are located in the groove; a roller II is installed in the middle of the hinge part, and roller II is located in the groove.

5. The internal pressure pipe bending aid according to claim 1, characterized in that: A positioning wheel is provided on the fixing bracket; a groove with an arc-shaped cross section is provided on the side surface of the positioning wheel.

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