Pipe bending device

Abstract

A pipe bending device relates to the technical field of pipe bending and comprises a stand column, a working platform and a flexible inner supporting device. A working platform is arranged at the top of the stand column, a vertical rotating pin is connected to the top of the working platform in a fastened mode, a supporting grooved wheel is arranged at the top of the rotating pin, and an unthreaded hole correspondingly matched with the rotating pin is formed in the center of the supporting grooved wheel; the bottom of the rotating pin is rotationally connected with a bending device used for applying force to the corresponding round pipe so that the round pipe can be bent around the supporting grooved wheel. A positioning device used for positioning the round pipe is arranged on the side, corresponding to the supporting grooved wheel, of the top of the working platform, and a flexible inner supporting device used for preventing the round pipe from being bent and shrunken during bending is inserted into the round pipe. The flexible inner supporting device for preventing the round pipe from being bent and shrunken during bending is inserted into the round pipe, and during bending operation, the air bag is expanded in the radial direction to support the pipe wall of the round pipe, so that the probability that the round pipe is bent and shrunken during bending can be effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of pipe bending, and in particular to a pipe bending device. Background Art

[0002] The round tube bending device is mainly used to bend round tubes made of metal or other materials to meet the needs of different shapes and sizes. The device is widely used in many industries such as construction, furniture manufacturing, automobile manufacturing, aerospace, etc. According to the different operation methods, the tube bending device is mainly divided into two types: manual and automatic. The automatic tube bending device is usually equipped with an advanced CNC system, which requires pre-programming of the bending parameters and is very suitable for large-scale production and high-precision occasions. In contrast, the manual tube bending device has a simple structure, flexible and convenient operation, and is more suitable for single-piece or small-batch operations, especially for some situations that require on-site adjustment and customization.

[0003] However, most of the existing pipe bending devices are suitable for bending thicker round pipes. When processing large diameter and thinner round pipes, bending and shrinking often occur, resulting in deformation or even scrapping of the workpiece. This problem not only increases production costs, but also affects production efficiency and product quality, becoming a key problem that technicians in this field need to solve urgently. Therefore, developing a pipe bending device that can efficiently bend large diameter thin-walled round pipes while ensuring bending quality and stability is of great significance to promoting the development of the industry.

[0004] A Chinese patent (publication number: CN213613491U) discloses a bending machine including a platform, a sizing shaft, a rotating shaft, a fixed shaft and an operating handle. The rotating shaft and the fixed shaft are fixed on the platform at intervals. The front end of the operating handle is fixed to the rotating shaft. The sizing shaft is fixed on the operating handle and is parallel to the rotating shaft. The gap between the sizing shaft and the rotating shaft is larger than the diameter of the steel pipe to be bent. The patent has a simple structure and is easy to use, but it is only applicable to the bending operation of round tubes with thicker walls. When bending round tubes with large diameters and thinner walls, the round tubes are often bent and scrapped. Summary of the invention

[0005] In order to overcome the deficiencies in the background technology, the present invention discloses a pipe bending device.

[0006] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0007] A pipe bending device, used for bending round pipes, comprises a column, a working platform and a flexible inner supporting device; a working platform is provided on the top of the column, a vertical swivel pin is fastened to the top of the working platform, a supporting groove wheel is provided on the top of the swivel pin, a light hole corresponding to the swivel pin is provided at the center of the supporting groove wheel; a bending device for applying force to the round pipe to bend it around the supporting groove wheel is rotatably connected to the bottom of the swivel pin; a positioning device for positioning the round pipe is provided on one side of the top of the working platform corresponding to the supporting groove wheel, and a flexible inner supporting device is inserted into the round pipe to prevent it from being bent when bending.

[0008] Preferably, the bending device includes a right-angle connecting plate, the horizontal plate body of the right-angle connecting plate is rotatably connected to the corresponding turn pin, and the vertical plate body of the right-angle connecting plate is fastened with a bending handle; the bending part of the right-angle connecting plate is provided with a movable top block that can cooperate with the supporting groove wheel to clamp the round tube.

[0009] Preferably, the bending handle is a hollow tube, and an extension handle is movably connected to the end of the tube facing away from the right-angle connecting plate.

[0010] Preferably, the positioning device includes a fixed block which is fastened to the working platform, a right-angle movable plate is provided on one side of the fixed block corresponding to the supporting groove wheel, the right-angle movable plate is rotatably connected to a screw rod which passes through the fixed block, and the screw rod is threadedly connected to the fixed block; a positioning block for positioning the round tube is detachably connected to the inner side of the right-angle movable plate.

[0011] Preferably, guide rods movably penetrating the fixed block are provided on both sides of the right-angle movable plate corresponding to the screw rod.

[0012] Preferably, the horizontal plate body of the right-angle movable plate is provided with a vertical positioning pin, and the positioning block is provided with a pin hole corresponding to the positioning pin.

[0013] Preferably, the flexible inner support device comprises a first limit head and a second limit head connected correspondingly by a steel wire rope, the steel wire rope body is provided with a tubular airbag, and one end of the airbag corresponding to the second limit head is connected to an inflation and deflation pipeline running through the second limit head.

[0014] Preferably, one end of the second limiting head facing away from the airbag is connected with a drawstring.

[0015] Preferably, one end of the first limiting head and the second limiting head corresponding to the airbag are both in a pointed cone structure.

[0016] Preferably, the steel wire rope body is provided with a hose.

[0017] Due to the adoption of the above-mentioned technical solution, the present invention has the following beneficial effects:

[0018] The invention discloses a pipe bending device with simple structure, easy assembly and low production cost. When bending a round pipe, a bending handle is used to drive a movable top block to rotate around a rotating pin axis, and when the movable top block rotates, a force is applied to the round pipe to make it bend around a supporting groove wheel. The movable top block does not need to be connected to a right-angle connecting plate, and when in use, it only needs to be placed at a right-angle bending position of the right-angle connecting plate. After the bending operation is completed, the movable top block can be pulled out from one side of the right-angle connecting plate to remove the round pipe, and the use is convenient and quick. When bending round pipes of different diameters, movable top blocks of different specifications can be selected to ensure that the notch of the movable top block can cooperate with the supporting groove wheel to clamp the round pipe.

[0019] The present invention further enables the positioning block to be detachably connected to the inner side of the right-angle movable plate, that is, in addition to adjusting the position of the fixing block by screwing the screw rod, fixing blocks of different specifications can also be replaced, thereby improving the adjustment efficiency.

[0020] The present invention has a flexible inner support device inserted into the round tube to prevent the round tube from being bent during bending. When in use, the flexible inner support device is first inserted into the round tube so that the airbag is located at the position of the round tube to be bent. The airbag is inflated or filled with other liquid media through the inflation and deflation pipeline. The airbag can expand radially to support the tube wall of the round tube, which can effectively reduce the probability of the round tube being bent during bending.

[0021] The present invention further connects a pull rope to the end of the second limit head facing away from the airbag, and the entire flexible inner support device can be pulled out of the circular tube by the pull rope after the airbag contracts radially; the ends of the first limit head and the second limit head corresponding to the airbag are both pointed cone-shaped structures, which prevents the ends of the first limit head and the second limit head corresponding to the airbag from forming cutting edges on the airbag after the airbag expands radially, causing accidental rupture of the airbag. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the present invention;

[0024] Figure 3 is a structural schematic diagram of a bending device;

[0025] Figure 4 is a schematic diagram of the structure of the positioning device;

[0026] Figure 5 It is a structural schematic diagram of the flexible inner support device.

[0027] In the figure: 1. column; 2. working platform; 3. bending device; 3-1. right-angle connecting plate; 3-2. bending handle; 3-3. extension handle; 4. supporting groove wheel; 5. positioning device; 5-1. fixing block; 5-2. right-angle movable plate; 5-3. screw rod; 5-4. positioning block; 5-5. guide rod; 5-6. positioning pin; 6. flexible inner support device; 6-1. first limit head; 6-2. second limit head; 6-3. wire rope; 6-4. air bag; 6-5. pull rope; 6-6. pull rope; 7. rotating pin; 8. movable top block. DETAILED DESCRIPTION

[0028] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. indicating directions or positional relationships, they only correspond to the drawings of the present application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction.

[0029] Combined with Figures 1 to 5 , a pipe bending device, used for bending a round pipe, comprising a column 1, a working platform 2 and a flexible inner support device 6; when in use, the column 1 is fixed vertically to the ground;

[0030] It should be noted that the column 1 can be a telescopic column whose length can be adjusted and positioned, so as to adjust the height according to user needs.

[0031] A working platform 2 is provided on the top of the column 1, and a vertical rotating pin 7 is fastened to the top of the working platform 2. A supporting groove wheel 4 is provided on the top of the rotating pin 7. A light hole corresponding to the rotating pin 7 is provided at the center of the supporting groove wheel 4, that is, when in use, a supporting groove wheel 4 of a suitable diameter can be selected according to the diameter of the round tube, and the supporting groove wheel 4 is sleeved on the rotating pin 7, and it is ensured that the supporting groove wheel 4 can rotate freely around the rotating pin 7; a weight-reducing groove and a weight-reducing hole are provided on the end face of the supporting groove wheel 4, which can effectively reduce the weight of the supporting groove wheel 4 and facilitate the user to replace the supporting groove wheel 4;

[0032] The bottom of the rotating pin 7 is rotatably connected to a bending device 3 for applying force to the corresponding round tube to make it bend around the supporting groove wheel 4, that is, when bending the round tube, the bending device 3 applies force to the corresponding round tube; Figure 3As shown, the bending device 3 comprises a right-angle connecting plate 3-1, the horizontal plate body of the right-angle connecting plate 3-1 is rotatably connected to the corresponding rotating pin 7, and the vertical plate body of the right-angle connecting plate 3-1 is tightly connected with a bending handle 3-2; the bending portion of the right-angle connecting plate 3-1 is provided with a movable top block 8 which can cooperate with the supporting groove wheel 4 to clamp the round tube, that is, when bending the round tube, the bending handle 3-2 drives the right-angle connecting plate 3-1 to rotate around the axis of the rotating pin 7, and the right-angle connecting plate 3-1 drives the movable top block 8 to rotate around the axis of the rotating pin 7 at the same time, and when the movable top block 8 rotates, force is applied to the round tube to make it bend around the supporting groove wheel 4;

[0033] It should be noted that the movable top block 8 does not need to be connected to the right-angle connecting plate 3-1. When in use, it only needs to be placed at the right-angle bend of the right-angle connecting plate 3-1. After the bending operation is completed, the movable top block 8 can be pulled out from one side of the right-angle connecting plate 3-1 to remove the round tube, which is convenient and quick to use. When bending round tubes of different diameters, movable top blocks 8 of different specifications can be selected to ensure that the notch of the movable top block 8 can cooperate with the supporting groove wheel 4 to clamp the round tube;

[0034] In order to save effort, the bending handle 3-2 is a hollow tube, and an extension handle 3-3 is movably inserted into the end thereof facing away from the right-angle connecting plate 3-1, that is, part of the extension handle 3-3 can be pulled out during the bending operation, thereby extending the bending handle 3-2; when not in use, the extension handle 3-3 can be retracted into the bending handle 3-2 to avoid occupying a larger space.

[0035] A positioning device 5 for positioning the round pipe is provided on one side of the top of the working platform 2 corresponding to the supporting groove wheel 4, that is, one end of the round pipe is positioned by the positioning device 5 so as to apply force to the other end of the round pipe so that the round pipe is bent around the supporting groove wheel 4.

[0036] As attached Figure 4 As shown, the positioning device 5 includes a fixed block 5-1 which is fastened to the working platform 2, and a right-angle movable plate 5-2 is provided on one side of the fixed block 5-1 corresponding to the supporting groove wheel 4, and the right-angle movable plate 5-2 is rotatably connected with a screw 5-3 which penetrates the fixed block 5-1, and the screw 5-3 is threadedly connected with the fixed block 5-1; a positioning block 5-4 for positioning the round tube is detachably connected to the inner side of the right-angle movable plate 5-2; when in use, the screw 5-3 can be screwed, and the screw 5-3 can push the right-angle movable plate 5-2, and the right-angle movable plate 5-2 can drive the fixed block 5-1 to push the round tube, that is, the position of the fixed block 5-1 can be adjusted by screwing the screw 5-3 according to the diameter of the round tube, so as to be suitable for bending operations of round tubes of various specifications.

[0037] It should be noted that the positioning block 5-4 is detachably connected to the inner side of the right-angle movable plate 5-2, that is, in addition to adjusting the position of the fixed block 5-1 by screwing the screw 5-3, the fixed blocks 5-1 of different specifications can also be replaced, thereby improving the adjustment efficiency; the horizontal plate body of the right-angle movable plate 5-2 is provided with a vertical positioning pin 5-6, and the positioning block 5-4 is provided with a pin hole corresponding to the positioning pin 5-6, which can facilitate the rapid replacement of the positioning block 5-4.

[0038] The right-angle movable plate 5-2 is provided with guide rods 5-5 on both sides of the screw rod 5-3 that movably penetrate the fixed block 5-1, which effectively improves the stability of adjusting the right-angle movable plate 5-2; the end of the screw rod 5-3 away from the right-angle movable plate 5-2 is movably inserted with a movable rod corresponding to the screw rod 5-3 and perpendicular to the screw rod 5-3, which can facilitate the screwing of the screw 5-3.

[0039] A flexible inner support device 6 is inserted into the round tube to prevent it from being bent during bending. That is, before bending the round tube, the flexible inner support device 6 can be inserted into the part of the round tube to be bent, and then the flexible inner support device 6 is expanded to support the tube wall of the round tube, which can effectively reduce the probability of the round tube being bent during bending.

[0040] As attached Figure 5 As shown, the flexible inner support device 6 includes a first limit head 6-1 and a second limit head 6-2 connected correspondingly by a steel wire 6-3, the steel wire 6-3 rope body is provided with a tubular airbag 6-4, and one end of the airbag 6-4 corresponding to the second limit head 6-2 is connected to a charging and discharging pipeline 6-5 that runs through the second limit head 6-2, that is, when in use, the flexible inner support device 6 is first inserted into the round tube, so that the airbag 6-4 is located at the position of the round tube to be bent, and the airbag 6-4 is inflated or filled with other liquid media through the charging and discharging pipeline 6-5. Due to the limiting effect of the first limit head 6-1 and the second limit head 6-2, the airbag 6-4 can expand radially, so that the tube wall of the round tube is supported by the airbag 6-4, and after the round tube is bent, the medium in the airbag 6-4 is discharged through the charging and discharging pipeline 6-5, so that the airbag 6-4 contracts radially, so that it can be pulled out of the round tube; the end of the second limit head 6-2 facing away from the airbag 6-4 is connected to a pull rope 6-6, that is, after the airbag 6-4 contracts radially, the entire flexible inner support device 6 can be pulled out of the round tube by the pull rope 6-6; the first limit head 6-1 and the second limit head 6-2 have one end corresponding to the airbag 6-4 that is in a pointed cone structure, so as to avoid the first limit head 6-1 and the second limit head 6-2 corresponding to the airbag 6-4 forming cutting edges on the airbag 6-4 after the airbag 6-4 expands radially, causing the airbag 6-4 to rupture accidentally; the wire rope 6-3 is provided with a hose, that is, the hose is located between the airbag 6-4 and the wire rope 6-3, so as to avoid the wire rope 6-3 wearing the airbag 6-4 and reducing the service life of the airbag 6-4.

[0041] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.

Claims

1. A pipe bending device for bending a round pipe, characterized by: The utility model comprises a column (1), a working platform (2) and a flexible inner supporting device (6); the working platform (2) is provided on the top of the column (1), the top of the working platform (2) is fastened with a vertical rotating pin (7), the top of the rotating pin (7) is provided with a supporting groove wheel (4), the center of the supporting groove wheel (4) is provided with a light hole corresponding to the rotating pin (7); the bottom of the rotating pin (7) is rotatably connected with a bending device (3) for applying force to a corresponding round tube so that it bends around the supporting groove wheel (4); a positioning device (5) for positioning the round tube is provided on one side of the top of the working platform (2) corresponding to the supporting groove wheel (4), and a flexible inner supporting device (6) is inserted into the round tube to prevent it from being bent when being bent.

2. The pipe bending device according to claim 1, characterized in that: The bending device (3) comprises a right-angle connecting plate (3-1), the horizontal plate body of the right-angle connecting plate (3-1) is rotatably connected to a rotating pin (7), and the vertical plate body of the right-angle connecting plate (3-1) is tightly connected to a bending handle (3-2); the bending portion of the right-angle connecting plate (3-1) is provided with a movable top block (8) that can cooperate with a supporting groove wheel (4) to clamp a round tube.

3. The pipe bending device according to claim 1, characterized in that: The bending handle (3-2) is a hollow tube, and an extension handle (3-3) is movably inserted into the end of the bending handle (3-2) that is away from the right-angle connecting plate (3-1).

4. The pipe bending device according to claim 1, characterized in that: The positioning device (5) comprises a fixed block (5-1) which is fastened to the working platform (2); a right-angle movable plate (5-2) is provided on one side of the fixed block (5-1) corresponding to the supporting groove wheel (4); the right-angle movable plate (5-2) is rotatably connected to a screw rod (5-3) which passes through the fixed block (5-1), and the screw rod (5-3) is threadedly connected to the fixed block (5-1); a positioning block (5-4) for positioning a round pipe is detachably connected to the inner side of the right-angle movable plate (5-2).

5. The pipe bending device according to claim 4, characterized in that: Guide rods (5-5) movably penetrating the fixed block (5-1) are provided on both sides of the right-angle movable plate (5-2) corresponding to the screw rod (5-3).

6. The pipe bending device according to claim 4, characterized in that: The horizontal plate body of the right-angle movable plate (5-2) is provided with a vertical positioning pin (5-6), and the positioning block (5-4) is provided with a pin hole corresponding to the positioning pin (5-6).

7. The pipe bending device according to claim 1, characterized in that: The flexible inner support device (6) comprises a first limiting head (6-1) and a second limiting head (6-2) connected correspondingly via a steel wire rope (6-3); a tubular air bag (6-4) is sleeved on the rope body of the steel wire rope (6-3); and one end of the air bag (6-4) corresponding to the second limiting head (6-2) is connected to a charging and discharging air pipeline (6-5) that runs through the second limiting head (6-2).

8. The pipe bending device according to claim 7, characterized in that: One end of the second limiting head (6-2) facing away from the airbag (6-4) is connected to a drawstring (6-6).

9. The pipe bending device according to claim 7, characterized in that: One end of the first limiting head (6-1) and the second limiting head (6-2) corresponding to the airbag (6-4) both present a pointed cone structure.

10. The pipe bending device according to claim 7, characterized in that: The rope body of the steel wire rope (6-3) is provided with a hose.

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