A pipe bender

Abstract

This utility model relates to the field of pipe bending technology and discloses a pipe bending tool. The tool includes a fixed handle and a rotating handle, wherein a pipe bending column and a fixed straight rod are fixedly mounted on the fixed handle; the rotating handle is rotatably mounted at the other end of the pipe bending column, and a pipe bending frame is provided on the side wall of the rotating handle; a semi-circular groove is provided on the side wall of the pipe bending column; and a lubrication assembly, including a lubricating medium source storing grease, a delivery pipe, and a trigger valve. The delivery pipe connects the lubricating medium source and the trigger valve, and the trigger valve is disposed on the pipe bending frame. When the pipe bending frame squeezes the pipe, it triggers the trigger valve, causing the lubricating medium to be discharged. This utility model, through an innovative lubrication structure design, allows grease to be discharged at the arc-shaped notch during pipe bending, thereby lubricating the contact surface that slides relative to the pipe, effectively reducing the friction between the relatively moving wall surfaces, making the pipe bending process smoother and more convenient.

Description

Technical Field

[0001] This utility model relates to the field of pipe bending technology, and in particular to a pipe bending device. Background Technology

[0002] Existing pipe benders use a movable component to bend the pipe wall around a pivot. One end of the pipe is held in place. During the bending process, the component that pushes the pipe to bend slides relative to the outer wall of the pipe. In existing technologies, this is direct sliding friction contact, which results in high friction and makes bending the pipe more difficult. In addition, it causes significant wear on the contact surfaces of the pipe bender and the pipe.

[0003] For example, an existing patent (publication number: CN205763155U) describes a pipe bender, which includes a base, a bending component, a rotating component, and a guide component. The bending component has a spiral bending groove on its side wall and a locking buckle that mates with the bending groove to form a locking hole. A positioning shaft is fixedly inserted into the bending cylinder and its lower end is connected to the base. The upper and lower connecting plates of the rotating component are movably connected to the positioning shaft above and below the bending cylinder and can rotate around the positioning shaft. The guide component's guide shaft is parallel to the positioning shaft and its upper end is connected to the upper connecting plate, and its lower end is connected to the lower connecting plate. A guide wheel has a guide groove and slides freely on the guide shaft. Such a pipe bender has a simple structure, is easy to manufacture, has low cost, low installation cost, is easy to operate, and has high construction efficiency.

[0004] However, the aforementioned patents exhibit dry friction between the pipe bender and the pipe fitting contact wall during the pipe bending process, which may result in mechanical scratches on the outside of the pipe fitting. Utility Model Content

[0005] This utility model provides a pipe bender to solve the problem mentioned in the background art of dry friction causing scratches on the outer wall of the pipe during the pipe bending process due to the use of existing patented technology.

[0006] A pipe bender, comprising; A fixed handle and a rotating handle, wherein a bent pipe column and a fixed straight rod are fixedly provided on the fixed handle; Furthermore, the rotating handle is rotatably mounted at the other end of the bent pipe column, and the side wall of the rotating handle is bent and extended to provide a pipe bending bracket; the side wall of the bent pipe column is provided with a semi-circular arc groove; A lubrication assembly includes a lubricating medium source containing grease, a delivery pipeline, and a trigger valve. The delivery pipeline connects the lubricating medium source and the trigger valve. The trigger valve is mounted on a pipe bend support. When the pipe bend support compresses the pipe, it triggers the trigger valve to discharge the lubricating medium.

[0007] Preferably, the side wall of the bent pipe column is provided with a plurality of bent pipe arc rings of different diameters at intervals along the axial direction, and correspondingly, the bent pipe frame is provided with a plurality of arc slots of different radii at intervals along the axial direction of the bent pipe column, and the arc slots and the bent pipe arc rings correspond one-to-one.

[0008] Preferably, the lubricating medium source includes an oil reservoir disposed in a hollow curved column, wherein the oil reservoir has a cavity for storing lubricating grease, the piston body is slidably disposed inside the oil reservoir, and the piston body and the inner wall of the oil reservoir are in a sealed sliding fit, a spring is disposed inside the oil reservoir to push the piston body upward, and the top of the oil reservoir is connected to a delivery pipeline.

[0009] Preferably, the conveying pipeline includes a main conveying pipe and a conveying branch pipe disposed within the bend frame. The main conveying pipe and the conveying branch pipe are connected. A dynamic sealing bearing is provided at the upper end of the oil storage tank. The main conveying pipe is inserted into the dynamic sealing bearing, thereby maintaining sealed conveying during the rotation of the rotating handle relative to the bend column.

[0010] Preferably, the trigger valve is installed in the grease drain hole located at the arc-shaped bayonet in the pipe bend frame. The trigger valve includes a valve body and a pin with a sealing plug fixed at its tail end. The tail end of the valve body is threadedly and sealed to the delivery branch pipe. A spring is also provided inside the valve body, and the front end of the spring rests on the sealing plug.

[0011] Preferably, the lower end of the oil storage tank is provided with a through vent hole for ventilation.

[0012] The advantages and positive effects of this utility model are: The innovative lubrication structure design allows grease to be discharged at the arc-shaped clamp during pipe bending, thereby lubricating the contact surface that slides relative to the pipe and avoiding dry friction that could scratch the outer wall of the pipe. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the main structure of this utility model; Figure 4 yes Figure 3 Enlarged structural diagram at point A (when ejector pin 22 is triggered by tube 18); Figure 5 This is a schematic diagram of the internal structure of the oil storage cylinder 26 in this utility model.

[0015] The following are labels in the attached diagram: 10. Fixed handle; 11. Bending column; 12. Bending arc ring; 13. Rotating handle; 14. Dynamic seal bearing; 15. Main delivery pipe; 16. Bending bracket; 17. Grease drain hole; 18. Pipe; 19. Valve body; 20. Delivery branch pipe; 21. Spring one; 22. Ejector pin; 23. Sealing plug; 24. Fixed straight rod; 25. Arc-shaped bayonet; 26. Oil reservoir; 27. Piston body; 28. Lubricating grease; 29. ​​Spring two; 30. Vent hole. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0017] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movement of the components in a specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance. The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings: like Figure 1-5 As shown, the pipe bender of this utility model includes: Fixed handle 10 and rotating handle 13, wherein a bent pipe column 11 and a fixed straight rod 24 are fixedly provided on the fixed handle 10; Furthermore, the rotating handle 13 is rotatably disposed at the other end of the bent pipe column 11, and the side wall of the rotating handle 13 is bent and extended to provide a pipe bending frame 16; the side wall of the bent pipe column 11 is provided with a semi-circular arc groove. Specifically, during operation, the wall of the pipe 18 is stuck between the semi-circular arc groove and the fixed straight rod 24 and abuts against the fixed straight rod 24. The remaining part of the pipe 18 is pushed around the bent pipe column 11 circumferentially by the pipe bending frame 16 during the rotation process, thereby causing the pipe 18 to bend. The lubrication assembly includes a lubricating medium source containing grease, a delivery pipeline, and a trigger valve. The delivery pipeline connects the lubricating medium source and the trigger valve. The trigger valve is mounted on the pipe bend bracket 16. When the pipe bend bracket 16 squeezes the pipe 18, it triggers the trigger valve to discharge the lubricating medium.

[0018] Preferably, the side wall of the pipe bending column 11 is provided with a plurality of pipe bending arc rings 12 of different diameters at intervals along the axial direction. Correspondingly, the pipe bending frame 16 is provided with a plurality of arc-shaped slots 25 of different radii at intervals along the axial direction of the pipe bending column 11, and the arc-shaped slots 25 and the pipe bending arc rings 12 correspond one-to-one. Specifically, when processing pipes 18 of different radii, they are adapted to the pipe bending arc rings 12 and arc-shaped slots 25 at different positions for processing.

[0019] Preferably, the lubricating medium source includes an oil reservoir 26 disposed in a hollow curved column 11, wherein the oil reservoir 26 has a cavity for storing lubricating grease 28, the piston body 27 is slidably disposed in the oil reservoir 26, and the piston body 27 and the inner wall of the oil reservoir 26 are in a sealed sliding fit, the second spring 29 is disposed in the oil reservoir 26 to push the piston body 27 upward, and the top of the oil reservoir 26 is connected to the delivery pipeline.

[0020] Preferably, the conveying pipeline includes a main conveying pipe 15 and a conveying branch pipe 20 disposed in the bend frame 16. The main conveying pipe 15 and the conveying branch pipe 20 are connected. The upper end of the oil storage tank 26 is provided with a dynamic sealing bearing 14. The main conveying pipe 15 is inserted into the dynamic sealing bearing 14, thereby maintaining sealed conveying during the rotation of the rotating handle 13 relative to the bend column 11. Specifically, a trigger valve is provided at each of the arc-shaped bayonet 25. Each trigger valve is connected to a corresponding conveying branch pipe 20. The four conveying branch pipes 20 are connected to the main conveying pipe 15.

[0021] Preferably, the trigger valve is installed in the grease drain hole 17 located at the arc-shaped bayonet 25 within the pipe bend frame 16. The trigger valve includes a valve housing 19 and a pin 22 with a sealing plug 23 fixed at its tail end. The tail end of the valve housing 19 is threadedly sealed to the delivery branch pipe 20. A spring 21 is also provided inside the valve housing 19, with the front end of the spring 21 pressing against the sealing plug 23 (e.g., Figure 5 When the tube 18 squeezes the ejector pin 22, it pushes the sealing plug 23 backward, causing the spring 21 to be compressed and deformed. At this time, the left wall of the sealing plug 23 is no longer in contact with the inner wall of the valve body 19, the trigger valve opens, and the grease 28 flows out from the grease discharge hole 17 after passing through the trigger valve and is applied between the tube 18 and the arc-shaped bayonet 25, thereby lubricating the tube 18 during the process of the tube bending bracket 16 pushing the tube 18.

[0022] Preferably, the lower end of the oil storage cylinder 26 is provided with a through vent 30 for ventilation.

[0023] It should be emphasized that the embodiments described in this utility model are illustrative rather than limiting. Therefore, this utility model is not limited to the embodiments described in the specific implementation. Any other implementation methods derived by those skilled in the art based on the technical solutions of this utility model are also within the scope of protection of this utility model.

Claims

1. A pipe bender, characterized in that: include; A fixed handle (10) and a rotating handle (13), wherein a bent pipe column (11) and a fixed straight rod (24) are fixedly provided on the fixed handle (10); Furthermore, the rotating handle (13) is rotatably disposed at the other end of the bent pipe column (11), and the side wall of the rotating handle (13) is bent and extended to provide a bent pipe bracket (16); the side wall of the bent pipe column (11) is provided with a semi-circular arc groove. The lubrication assembly includes a lubricating medium source containing grease, a delivery pipeline, and a trigger valve. The delivery pipeline connects the lubricating medium source and the trigger valve. The trigger valve is mounted on the pipe bend frame (16). When the pipe bend frame (16) squeezes the pipe (18), it triggers the trigger valve to discharge the lubricating medium.

2. A pipe bender according to claim 1, characterized in that: The side wall of the bent pipe column (11) is provided with several bent pipe arc rings (12) of different diameters at intervals along the axial direction. Correspondingly, the bent pipe frame (16) is provided with several arc slots (25) of different radii at intervals along the axial direction of the bent pipe column (11), and the arc slots (25) and the bent pipe arc rings (12) correspond one-to-one.

3. A pipe bender according to claim 2, characterized in that: The lubricating medium source includes an oil reservoir (26) disposed in a hollow curved column (11), wherein the oil reservoir (26) is provided with a cavity for storing lubricating grease (28), a piston body (27) is slidably disposed in the oil reservoir (26), and the piston body (27) and the inner wall of the oil reservoir (26) are in a sealed sliding fit, a spring (29) is disposed in the oil reservoir (26) to push the piston body (27) upward, and the top of the oil reservoir (26) is connected to a delivery pipeline.

4. A pipe bender according to claim 3, characterized in that: The conveying pipeline includes a main conveying pipe (15) and a conveying branch pipe (20) disposed in the bend frame (16). The main conveying pipe (15) and the conveying branch pipe (20) are connected. A dynamic sealing bearing (14) is provided at the upper end of the oil storage tank (26). The main conveying pipe (15) is inserted into the dynamic sealing bearing (14) to maintain sealed conveying during the rotation of the rotating handle (13) relative to the bend column (11).

5. A pipe bender according to claim 4, characterized in that: The trigger valve is installed in the grease drain hole (17) located at the arc-shaped bayonet (25) inside the pipe bend frame (16). The trigger valve includes a valve body (19) and a pin (22) with a sealing plug (23) fixed at its tail end. The tail end of the valve body (19) is threadedly sealed to the delivery branch pipe (20). A spring (21) is also provided inside the valve body (19), and the front end of the spring (21) rests on the sealing plug (23).

6. A pipe bender according to claim 5, characterized in that: The lower end of the oil storage tank (26) is provided with a through vent (30) for ventilation.

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