A pipe beveling machine and method

Abstract

This invention discloses a pipe beveling machine and method, relating to the field of beveling machine technology. It includes a support frame, with a support shaft parallel to it connected to one side. A rolling shaft and a motor are mounted on the support frame. Rollers are mounted on the rolling shaft. A drive shaft at the motor output end engages with the rolling shaft via a gear set to drive the rollers to rotate. A grinding head is connected to the end of the drive shaft via a bevel gear set. The rolling shaft is parallel to the support shaft. A hydraulic device is connected to the support shaft via a hydraulic cylinder. The output end of the hydraulic device is rotatably connected to both ends of the rotating shaft. The support shaft is used to extend into the pipe. The rotating shaft and rollers are correspondingly arranged to clamp the pipe sidewall. Beveling can be performed on both suspended pipes already installed at one end and ground pipes cut and ready for installation, without the need to replace other components such as fastening rings, clamping rings, or tensioning blocks, greatly reducing restrictions on the working environment.

Description

Technical Field

[0001] This invention relates to the field of beveling machine technology, and in particular to a pipe beveling machine and method. Background Technology

[0002] In the construction process of industries such as petroleum, chemical, natural gas, metallurgy, and steel, metal pipes of different materials are required. Pipe connections rely on welding, necessitating beveling. Existing pipe beveling machines on the market, besides traditional manual beveling, generally include handheld beveling machines, automatic walking beveling machines, and stationary beveling machines. Their fixing methods are invariably segmented, internally expanding, externally embedded, and externally clamped. The working principle involves, under certain support conditions, an electric motor drives the cutting head to move the cutting blades in a circular motion around the pipe cut, or the beveling machine is fixed, supplemented by manual rotation of the pipe head to achieve the pipe beveling. The equipment used in these methods has the following drawbacks, which is the main reason why construction units try to avoid the beveling process in actual production and construction.

[0003] 1. Traditional manual beveling is inefficient and unsafe, and hand-held angle grinders produce poor-quality beveling. 2. New beveling machines are expensive. Beveling machines using cutting techniques can cost anywhere from tens of thousands to hundreds of thousands of yuan, resulting in high purchase and maintenance costs. 3. Beveling machines lack versatility. A single set of components is only suitable for a limited range of pipe diameters. In practice, frequent component replacement is required depending on the pipe diameter, necessitating the purchase of multiple sets to meet the needs of different pipe diameters, significantly increasing construction costs. 4. Fixing the beveling machine and manually rotating the pipe head limits its application. It's generally suitable for short pipe sections in easily movable workshops, but unsuitable for long, large-diameter, and heavy pipes in pipeline construction sites. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a pipe beveling machine and method. The beveling machine can be adapted to pipes of different diameters. As long as the structure of the support shaft of the mechanism itself can extend into the pipe, the pipe can be beveling can be achieved.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0006] In a first aspect, a pipe beveling machine includes a support frame, a support shaft connected to one side of the support frame and arranged parallel thereto, a rolling shaft and a motor provided on the support frame, a roller provided on the rolling shaft, a drive shaft at the output end of the motor cooperating with the rolling shaft through a gear set to drive the roller to rotate, and a grinding head connected to the end of the drive shaft through a bevel gear set.

[0007] The rolling shaft is arranged parallel to the support shaft. A hydraulic device is connected to the support shaft via a hydraulic cylinder. The output end of the hydraulic device is rotatably connected to both ends of the rotating shaft. The support shaft is used to extend into the pipe. The rotating shaft and rollers are arranged accordingly to clamp the side wall of the pipe.

[0008] As a further implementation, the support frame is rectangular, and one end of the support frame is connected to the support shaft via a fixed rod, with the lengths of the support frame and the support shaft being adapted to each other.

[0009] As a further implementation, the support frame is used to be installed on the outside of the pipe, and a connecting rod is provided on the support frame, which is rotatably connected to the rolling shaft.

[0010] As a further implementation, the gear set includes a driving gear and a driven gear. The driving gear is located on the periphery of the drive shaft, and the driven gear is located on the periphery of the rolling shaft. The diameter of the driven gear is larger than that of the driving gear to reduce the rotational speed of the rolling shaft, thereby increasing the torque of the rolling shaft.

[0011] As a further implementation, the bevel gear set includes a first bevel gear and a second bevel gear of the same type. The first bevel gear is fixedly connected to the end of the drive shaft, and the second bevel gear is engaged with the grinding head through a rotating shaft. The rotating shaft passes through the connecting rod and is rotatably connected to the connecting rod.

[0012] As a further implementation, the roller is fixedly connected to the rolling shaft, and the roller is provided with a number of dot-shaped protrusions. The protrusions are distributed in a spiral pattern on the surface of the roller. When the driving gear drives the driven gear to move the rolling shaft forward along the outer wall of the pipe perpendicular to the pipe axis, a pull-back force is maintained from the pipe bevel end to the other end, so that the grinding head and the pipe bevel end remain in a tight fit.

[0013] As a further implementation, the hydraulic cylinder includes an oil chamber arranged along the length of the support shaft, and a hydraulic device is located at both ends of the hydraulic cylinder, with the output end of the hydraulic device facing the roller.

[0014] As a further implementation, the support frame is provided with a support member, one end of which is sleeved on the periphery of the drive shaft and rotatably connected to the drive shaft.

[0015] As a further implementation, the cutting surface of the grinding head is at a 30-45° angle to the outer wall of the pipe.

[0016] Secondly, a method for operating a pipe beveling machine, characterized by employing a pipe beveling machine and including the following steps:

[0017] The support shaft extends deep into the pipe and is fitted with rollers that fit tightly against the outer wall of the pipe; the rotating shaft is lifted by a hydraulic device so that it fits tightly against the inner wall of the pipe, and the rotating shaft, together with the rollers, clamps the side wall of the pipe.

[0018] Turn on the motor, and the grinding head will be driven by the gear set to grind the end of the pipe. The gear set will also enable the pipe beveling machine to make circular motion along the outer wall of the pipe as the rollers rotate.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. The support shaft of the present invention is used to extend into the inside of the pipe, and the rotating shaft and roller are correspondingly arranged to clamp the side wall of the pipe. The motor drives the roller to rotate on the outer surface of the pipe, and the beveling machine can make circumferential motion along the outer wall of the pipe under the rotation of the roller, so as to realize the beveling of the end edge of the pipe by the grinding head without manual intervention.

[0021] 2. In this invention, the driven gear is set to have a larger diameter than the driving gear. This allows the driven gear to reduce its rotational speed and increase its torque during grinding operations on the beveling machine. Ultimately, this results in the roller's rotational speed being much lower than the grinding head's rotational speed, achieving the effect of the grinding head rapidly rotating to grind the pipe while the roller moves slowly along the outer wall of the pipe.

[0022] 3. The protrusions of this invention are distributed in a spiral pattern on the surface of the roller, so that when the beveling machine moves along the outer wall of the pipe under the rotation of the roller, it generates a force opposite to that of the bevel end of the pipe, that is, it maintains a certain pull force from the bevel end of the pipe to the other end of the pipe, ensuring that the grinding head at the bevel is always in close contact with the end of the pipe wall, so as not to separate the beveling machine from the bevel end.

[0023] 4. The hydraulic device on the support shaft of this invention allows the beveling machine to adapt to pipes of different diameters. As long as the device structure of the support shaft part of the mechanism can extend into the pipe, the pipe can be beveling. Whether it is a suspended pipe that has been installed at one end or a ground pipe that has been cut and is ready for installation, beveling can be performed, reducing the restrictions on the working environment. Attached Figure Description

[0024] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0025] Figure 1 This is a schematic diagram of the overall structure of a pipe beveling machine according to an embodiment of the present invention.

[0026] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0027] The components are: 1. Support frame, 2. Support shaft, 3. Rolling shaft, 4. Motor, 5. Connecting rod, 6. Pipe, 7. Support seat, 8. Roller, 21. Oil chamber, 22. Oil injection hole, 23. Hydraulic device, 24. Rotating shaft; 41. Drive shaft, 42. Driving gear, 43. Driven gear, 44. First bevel gear, 45. Second bevel gear, 46. Support component, 47. Grinding head, 48. Rotating shaft, 51. Bearing. Detailed Implementation

[0028] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0029] Example 1

[0030] In a typical embodiment of the present invention, reference is made to Figure 1 As shown, a pipe beveling machine includes a support frame 1, a support shaft 2 parallel to the support frame 1 connected to one side of the support frame 1, the support frame 1 and one end of the support shaft 2 connected by a fixing rod, and the lengths of the support frame 1 and the support shaft 2 are adapted to each other.

[0031] like Figure 1 As shown, a rolling shaft 3 is provided on the support frame 1. When beveling and grinding the pipe 6, the support frame 1 is positioned on the outside of the pipe 6. A connecting rod 5 is provided on the support frame 1, and the connecting rod 5 is rotatably connected to the rolling shaft 3. In this embodiment, one end (left end) of the rolling shaft 3 is rotatably connected to the support frame 1, and the other end (right end) is rotatably connected to the connecting rod 5. The connecting rod 5 and the rolling shaft 3 are on the same straight line, and a bearing 51 is provided between them to achieve the rotatable connection. The connecting rod 5 and the rolling shaft 3 are arranged parallel to the support shaft. A roller 8 is provided on the rolling shaft 3, and the roller 8 is fixedly connected to the rolling shaft 3.

[0032] A motor 4 is mounted on the support frame 1. The drive shaft 41 at the output end of the motor 4 is connected to the rolling shaft 3 through a gear set to drive the roller 8 to rotate. The end of the drive shaft 41 is connected to the grinding head through a bevel gear set.

[0033] The rolling shaft 3 is arranged parallel to the support shaft 2. The support shaft 2 is connected to the hydraulic device 23 via a hydraulic cylinder. The output end of the hydraulic device 23 is rotatably connected to both ends of the rotating shaft 24. The support shaft 2 is used to extend into the pipe 6. The rotating shaft 24 and the roller 8 are correspondingly arranged to clamp the side wall of the pipe 6.

[0034] Motor 4 drives drive shaft 41 to rotate, which in turn drives grinding head 47 to rotate through bevel gear set. The gear set drives rolling shaft 3 to rotate, so that roller 8 rotates on the outer surface of pipe 6. Since rotating shaft 24 and roller 8 clamp the side wall of pipe 6, beveling machine can make circumferential motion along the outer wall of pipe 6 under the rotation of roller 8, so that grinding head 47 can bevel the edge of pipe 6.

[0035] like Figure 1 As shown, the gear set includes a driving gear 42 and a driven gear 43. The driving gear 42 is located around the drive shaft 41, and the driven gear 43 is located around the rolling shaft 3. The diameter of the driven gear 43 is larger than that of the driving gear 42 to reduce the rotational speed of the rolling shaft 3. The rotation of the motor 4 drives the driving gear 42 to rotate, which in turn drives the rolling shaft 3 to rotate through the driven gear 43, thereby enabling the rolling shaft 3 to drive the roller 8 to rotate (the roller is fixedly connected to the rolling shaft).

[0036] The bevel gear set includes a first bevel gear 44 and a second bevel gear 45 of the same type. The first bevel gear 44 is fixedly connected to the end of the drive shaft 41, and the second bevel gear 45 is engaged with the grinding head 47 via a rotating shaft 48. The rotating shaft 48 passes through the connecting rod 5 and is rotatably connected to the connecting rod 5. By setting up the bevel gears, the direction of power transmission at the output end of the motor 4 is achieved to be transmitted perpendicularly at 90°. The two bevel gears are designed with the same diameter and number of teeth, so that the two bevel gears can maintain the same high-speed operation to achieve the purpose of rapid grinding.

[0037] In an alternative example, the shaft 48 is configured to be pluggable from top to bottom. Both ends of the shaft 48 are designed to be polygonal, with one end passing through a bevel gear and the other end passing through the center hole of the grinding head. The center hole of the grinding head 47 is also polygonal and matches the shape of the end of the shaft 48 to facilitate the replacement of the grinding head 47 and the fixing of the grinding head.

[0038] The grinding head 47 is made of a material with high wear resistance and strong cutting ability. The grinding head 47 is designed as a conical cylinder with a larger top and a smaller bottom. The cutting surface of the grinding head 47 is at a 30-45° angle to the outer wall of the pipe to meet the angle requirements of the finished product bevel.

[0039] In this embodiment, the driven gear 43 is set to have a larger diameter than the driving gear 42. This allows the driven gear 43 to reduce its rotational speed and increase its torque during the grinding operation of the beveling machine. Ultimately, this results in the rotational speed of the rolling shaft 3 being less than that of the grinding head 47, achieving the effect of the grinding head 47 rapidly rotating to grind the pipe while the roller 8 moves slowly along the outer wall of the pipe.

[0040] The hydraulic cylinder is a full-length hydraulic cylinder with a hydraulic switch and includes an oil chamber 21. The oil chamber 21 is arranged along the length of the support shaft. Miniature hydraulic devices 23 are located at both ends of the hydraulic cylinder, with the output end of the hydraulic device 23 facing the roller. In this embodiment, the hydraulic device 23 is a hydraulic jack. The output end of the hydraulic jack is rotatably connected to the rotating shaft 24. The oil chamber 21 is provided with an oil injection hole 22 and an oil outlet hole. The oil chamber is connected to an external hydraulic system. The hydraulic jack can lift the rotating shaft 24, making it fit tightly against the inner wall of the pipe. Therefore, it can be adapted to a wide range of pipe diameters, as long as the roller 8 and the rotating shaft 24 clamp the side wall of the pipe.

[0041] In this embodiment, the rotating shaft 24 serves to bear pressure, fix, and maintain balance. The rotating shaft can rotate to reduce frictional resistance with the inner wall of the pipe and improve the smoothness of rotational operation. The rotating shaft and rollers are arranged correspondingly.

[0042] The support frame 1 is provided with several support members 46, one end of which is sleeved around the drive shaft and rotatably connected to the drive shaft. The support members 46 are used to ensure that the drive shaft of the motor maintains constant rotation and does not deviate.

[0043] In this embodiment, the roller 8 is a high-strength, wear-resistant, straight-tube rubber wheel. The outer ring of the rubber wheel is made of a material with high friction and has sufficient strength to withstand significant pressure. The rubber wheel has several dot-like protrusions distributed in a spiral pattern on its surface. The purpose of this spiral rubber wheel is to generate a force opposite to the bevel end of the pipe as the beveling machine moves along the outer wall of the pipe under the rotation of the rubber wheel. While the rubber wheel rotates at a constant speed close to the outer wall of the pipe, it maintains a certain pull force from the bevel end of the pipe to the motor end. This ensures that the grinding head at the bevel end remains tightly fitted to the pipe wall end as the beveling machine rotates along the pipe wall, preventing the beveling machine from separating from the bevel end.

[0044] Understandably, with Figure 1 Taking the view direction as an example, the setting principle of the thread direction of the roller 8 in this embodiment is based on the rotation direction of the motor drive shaft. The purpose is to ensure that when the beveling machine is beveling the pipe, the roller has a rightward frictional force on the pipe, and the corresponding pipe has a leftward frictional force (pull-back force) on the beveling machine. Under the action of the resultant force, the beveling machine always has a tendency to move to the left, thereby ensuring that the grinding head is always in close contact with the end of the pipe for grinding, and the grinding head will not detach from the bevel end of the pipe when the beveling machine is grinding.

[0045] In a preferred embodiment, two rotating shafts can be provided, which are arranged adjacently but not in contact. Each end of the two rotating shafts is rotatably connected to a corresponding hydraulic device, and the extended line of the roller's diameter passes through the middle position of the two rotating shafts, thus ensuring the stability of the beveling machine's operation.

[0046] In actual grinding, the bottom of the pipe is supported by the support base 7, and the beveling machine is installed for grinding.

[0047] Example 2

[0048] A method for operating a pipe beveling machine, characterized by employing a pipe beveling machine and including the following steps:

[0049] Turn on the power of the beveling machine, insert the support shaft 2 into the inside of the pipe, and set the roller 8 to be close to the outer wall of the pipe 6; turn on the hydraulic switch, and lift the rotating shaft through the hydraulic device 23 so that the rotating shaft 24 is close to the inner wall of the pipe 6. The roller 8 on the beveling machine and the rotating shaft 24 on the support shaft 2 are tightly attached to the inner and outer sides of the pipe 6, and the pressure is automatically constant.

[0050] Turn on the motor power of the beveling machine. The gear set drives the grinding head 47 to grind the end of the pipe 6. The gear set enables the pipe beveling machine to make circumferential motion along the outer wall of the pipe under the rotation of the roller 8. At the same time, the high-speed rotation of the first bevel gear 44 at the end of the drive motor drives the second bevel gear 45, which meshes with it, to rotate at the same speed. This, in turn, drives the grinding head 47, which is connected to the second bevel gear 45, to rotate at high speed, following the forward direction of the beveling machine to complete the grinding and shaping of the bevel end.

[0051] From a practical industrial perspective, small-diameter pipes generally have limited pressure resistance and therefore do not require beveling. The beveling machine in this embodiment can be beveled as long as the support shaft of the machine itself can extend into the pipe. This applies to both suspended pipes already installed at one end and ground-level pipes that have been cut and are ready for installation. Furthermore, it eliminates the need to replace other components such as fastening rings, clamping rings, or tensioning blocks, significantly reducing limitations on the working environment and truly achieving economical, efficient, fully automated, multi-scenario, and integrated beveling processes.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A pipe beveling machine, characterized in that, The device includes a support frame, with a support shaft parallel to it connected to one side. The support frame has a rolling shaft and a motor. Rollers are mounted on the rolling shaft. A drive shaft at the motor output engages with the rolling shaft via a gear set to drive the rollers to rotate. A grinding head is connected to the end of the drive shaft via a bevel gear set. The rolling shaft is parallel to the support shaft. A hydraulic device is connected to the support shaft via a hydraulic cylinder. The output end of the hydraulic device is rotatably connected to both ends of the rotating shaft. The support shaft is used to extend into the pipe. The rotating shaft and rollers are correspondingly arranged to clamp the pipe sidewall. The rollers are fixedly connected to the rolling shaft. The rollers have several dot-shaped protrusions distributed in a spiral pattern on their surface to maintain a pull-back force from the pipe bevel end to the other end. The support frame is rectangular, and one end of the support frame is connected to the support shaft via a fixed rod. The lengths of the support frame and the support shaft are adapted to each other. The support frame is used to be installed on the outside of the pipe, and a connecting rod is provided on the support frame. The connecting rod is rotatably connected to the rolling shaft. The gear set includes a driving gear and a driven gear. The driving gear is located on the periphery of the drive shaft, and the driven gear is located on the periphery of the rolling shaft. The diameter of the driven gear is larger than that of the driving gear to reduce the rotational speed of the rolling shaft. The bevel gear set includes a first bevel gear and a second bevel gear of the same type. The first bevel gear is fixedly connected to the end of the drive shaft, and the second bevel gear is engaged with the grinding head via a rotating shaft. The rotating shaft passes through the connecting rod and is rotatably connected to the connecting rod. The hydraulic cylinder includes an oil chamber, which is arranged along the length of the support shaft. The hydraulic device is located at both ends of the hydraulic cylinder, and the output end of the hydraulic device faces the roller. The cutting surface of the grinding head is at a 30-45° angle to the outer wall of the pipe.

2. A pipe beveling machine according to claim 1, characterized in that, The support frame is provided with a support member, one end of which is sleeved around the drive shaft and rotatably connected to the drive shaft.

3. A method for operating a pipe beveling machine, characterized in that, The pipe beveling machine as described in any one of claims 1-2 includes the following steps: The support shaft extends deep into the pipe and is fitted with rollers that fit tightly against the outer wall of the pipe; the rotating shaft is lifted by a hydraulic device so that it fits tightly against the inner wall of the pipe, and the rotating shaft, together with the rollers, clamps the side wall of the pipe. Turn on the motor, and the grinding head will be driven by the gear set to grind the end of the pipe. The gear set will also enable the pipe beveling machine to make circular motion along the outer wall of the pipe as the rollers rotate.

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