An integrated fabrication device for internally threaded helical tubes and its working method

Abstract

An integrated fabrication device for internally threaded spiral tubes includes a steel pipe feeding mechanism and a steel pipe turning mechanism mounted on a main machine, and a machine head feeding mechanism and a tube bending mechanism mounted on a machine head. The machine head is mounted on the main machine via a translation mechanism and also on the translation mechanism via a rotation mechanism. The steel pipe feeding mechanism and the machine head feeding mechanism are used to clamp and forwardly convey the steel pipe. The steel pipe turning mechanism is used to clamp the steel pipe and rotate it axially by a set angle. The tube bending mechanism is pivotally connected to the machine head and includes forming rollers for clamping the steel pipe, forming pressure rollers, and a pitch control mechanism. The forming rollers and forming pressure rollers are driven to move axially via the pitch control mechanism. The working method of the integrated fabrication device for internally threaded spiral tubes includes steps such as horizontal bending, vertical bending, and spiral tube coiling. This invention enables the fabrication of internally threaded spiral tubes to be completed on a single machine, improving equipment utilization, saving manufacturing costs, and significantly improving work efficiency and product quality.

Description

Technical Field

[0001] This invention belongs to the technical field of steel pipe processing equipment, and in particular relates to an integrated internal spiral tube preparation device and its working method that can complete the preparation of internal spiral tubes on one machine. Background Technology

[0002] Heat exchange devices such as heat exchangers are often used. Figure 1 The pipe head joint shown is an internally threaded spiral pipe located inside the spiral of the spiral pipe. In the prior art, the preparation of this type of internally threaded spiral pipe first requires bending the spiral pipe head on a pipe bending machine, and then winding the steel pipe into a spiral on a spiral pipe bending machine. The steel pipe needs to be transferred between two different machines, resulting in low production efficiency and low space utilization in the production workshop. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing methods for preparing internally threaded spiral tubes by providing an integrated internally threaded spiral tube preparation device and its working method that can complete the preparation of internally threaded spiral tubes on a single device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An integrated preparation device for internally threaded spiral tubes, characterized in that: it includes a steel pipe feeding mechanism and a steel pipe turning mechanism mounted on the main machine, and a machine head feeding mechanism and a pipe bending mechanism mounted on the machine head; the machine head is mounted on the main machine via a translation mechanism; the machine head is mounted on the translation mechanism via a rotation mechanism.

[0006] The steel pipe feeding mechanism is used to clamp the steel pipe and convey it forward.

[0007] The steel pipe rotation mechanism is used to clamp the steel pipe and rotate it axially by a set angle.

[0008] The head feeding mechanism is used to clamp the steel pipe and convey it forward.

[0009] The pipe bending mechanism is pivotally connected to the machine head and includes forming rollers, forming pressure rollers, and a pitch control mechanism. The forming rollers and forming pressure rollers cooperate to clamp the steel pipe, and the forming rollers and forming pressure rollers are driven to move axially through the pitch control mechanism.

[0010] A rotating pipe bending mechanism allows a device to switch between bending and coiling modes. The die head is mounted on a translation mechanism to prevent interference with the steel pipe during function switching. The bending mechanism, pivotally connected to the die head, can bend elbows in a horizontal position; the bending mechanism, in conjunction with the pitch control mechanism, can coil spiral pipes in a vertical position. A steel pipe turning mechanism, working in conjunction with the bending mechanism, can bend elbows in both horizontal and vertical directions for internal spiral pipes.

[0011] A further feature is that the steel pipe feeding mechanism and the steel pipe turning mechanism are mounted on the lifting device on the main machine. The vertical position of the steel pipe feeding mechanism and the steel pipe turning mechanism is adjusted by the lifting device to keep them highly consistent with the head feeding mechanism and the pipe bending mechanism under different working conditions.

[0012] Furthermore, both the steel pipe feeding mechanism and the die head feeding mechanism include multiple actively rotating feeding rollers and driven rollers that can move up and down. The circumferential surfaces of the feeding rollers and driven rollers have grooves matching the outer diameter of the steel pipe. The steel pipe is clamped or conveyed forward between the feeding rollers and driven rollers. The clamping, conveying, and releasing of the steel pipe are achieved by the up and down movement of the driven rollers. The grooves on the circumferential surfaces of the rollers increase the contact area between the rollers and the steel pipe, providing greater friction for clamping the steel pipe and facilitating its clamping and conveying.

[0013] Preferably, the feeding roller is driven to rotate synchronously by a gear set consisting of multiple meshing feeding gears.

[0014] Preferably, the forming roller and the forming pressure roller have grooves on their circumferential surfaces that match the outer diameter of the steel pipe; the forming roller is coaxially arranged with the pivot of the pipe bending mechanism, and the forming pressure roller is mounted on a linear slide rail and moves along the slide rail. The movement of the forming pressure roller achieves clamping and positioning of the steel pipe. The coaxial arrangement of the forming roller and the pivot of the pipe bending mechanism ensures that the relative position does not change when the pipe bending mechanism rotates around the pivot, while the rotation of the pipe bending mechanism around the pivot causes the relative position of the forming pressure roller and the forming roller to change, thereby achieving control of the spiral diameter during pipe bending and spiral pipe coiling.

[0015] Preferably, the head feeding mechanism and the tube bending mechanism are mirror-imagely arranged on both sides of the head. The mirror-image head feeding mechanism and the tube bending mechanism can be used for tube bending and spiral tube coiling respectively, and can also realize spiral tube coiling in different spiral directions, thereby improving the efficiency of the equipment.

[0016] Preferably, the pitch control mechanism includes a servo motor and a lead screw mechanism. The servo motor drives the forming rollers and forming pressure rollers on both sides to move axially through the lead screw mechanism. By using a transmission mechanism to achieve axial movement of the forming rollers and forming pressure rollers on both sides, the pitch is adjusted, improving equipment utilization and saving manufacturing costs.

[0017] Preferably, the steel pipe feeding mechanism is equipped with a length-fixing mechanism at its front end for measuring the conveying length of the steel pipe; the length-fixing mechanism is an encoder. By using the encoder to measure the length of the steel pipe during conveying, the dimensional accuracy of the final product is ensured, thus improving product quality.

[0018] A method for operating the above-mentioned integrated fabrication apparatus for internally inserted spiral tubes is characterized by comprising the following steps:

[0019] (1) The rotating mechanism drives the machine head to rotate, so that the machine head feeding mechanism and the pipe bending mechanism are in a horizontal state; the steel pipe feeding mechanism clamps the steel pipe and feeds it forward until the front end of the steel pipe enters the clamping of the machine head feeding mechanism, and the head of the steel pipe is located between the forming roller and the forming pressure roller; the pipe bending mechanism rotates around the pivot, and the forming pressure roller pushes the steel pipe to rotate 180° along the surface of the forming roller to complete the horizontal bending.

[0020] (2) The bending mechanism is reset; the steel pipe feeding mechanism, the machine head feeding mechanism, and the forming roller and forming pressure roller are released from clamping; the steel pipe cornering mechanism clamps the steel pipe and rotates it axially to make the head of the steel pipe bend horizontally and stand upright; the steel pipe feeding mechanism and the machine head feeding mechanism clamp the steel pipe and convey it forward a distance, and the lower part of the horizontally bent steel pipe is located between the forming roller and the forming pressure roller; the bending mechanism rotates around the pivot, and the forming pressure roller pushes the steel pipe to rotate 90° along the surface of the forming roller to complete the bending of the vertical bend;

[0021] (3) The steel pipe feeding mechanism, the head feeding mechanism, and the forming roller and forming pressure roller are released from clamping; the translation mechanism drives the head to translate, and the rotation mechanism drives the head to rotate, so that the head feeding mechanism and the bending mechanism are in a vertical state; the steel pipe feeding mechanism clamps the steel pipe and feeds it forward until the front end of the steel pipe enters the clamping of the head feeding mechanism, and the steel pipe is located between the forming roller and the forming pressure roller; the forming roller and the forming pressure roller are driven to move axially through the pitch control mechanism to adjust the pitch; the spiral diameter is adjusted by adjusting the angle of rotation of the bending mechanism around the pivot; the steel pipe feeding mechanism and the head feeding mechanism clamp the steel pipe and feed it continuously to complete the preparation of the inner spiral tube.

[0022] Preferably, the preparation of the inner spiral tube also includes bending the other end of the inner spiral tube in a horizontal state by using a steel pipe cornering mechanism and a pipe bending mechanism in combination.

[0023] This invention enables a single device to switch between bending and coiling working states via a rotating bending mechanism. The bending mechanism, pivotally connected to the machine head, can bend the tube in a horizontal position; in conjunction with a pitch control mechanism, it can coil the helical tube in a vertical position. A steel pipe turning mechanism, working in conjunction with the bending mechanism, can bend the internally threaded helical tube in both horizontal and vertical directions. The bending mechanism, rotating around a pivot, allows for adjustment of the helical diameter. The pitch is adjusted by the lateral movement of the bending mechanism. This invention allows for the complete fabrication of internally threaded helical tubes on a single machine, improving equipment utilization, saving manufacturing costs, and significantly enhancing work efficiency and product quality. Attached Figure Description

[0024] Figure 1 is a schematic diagram of the internal spiral tube.

[0025] Figure 2 is a schematic diagram of the integrated fabrication device for the internal spiral tube.

[0026] Figure 3 is a schematic diagram of the bending state of the internal spiral pipe bend. Detailed Implementation

[0027] like Figure 2 , 3 As shown, an integrated preparation device for internally threaded spiral tubes includes a fixed-length mechanism 11, a steel pipe feeding mechanism 12, and a steel pipe turning mechanism 13 mounted on the main unit 1. Two sets of head feeding mechanisms 21 and pipe bending mechanisms 22 are mirror-mounted on both sides of the head unit 2. The head unit 2 is mounted on the main unit 1 via a translation mechanism 3; the head unit 2 is also mounted on the translation mechanism 3 via a rotation mechanism 4.

[0028] The fixed-length mechanism 11, the steel pipe feeding mechanism 12, and the steel pipe turning mechanism 13 are mounted on the lifting device on the main unit 1.

[0029] The length-fixing mechanism 11 is an encoder used to measure the conveying length of the steel pipe.

[0030] The steel pipe rotation mechanism 13 is used to clamp the steel pipe and rotate it axially to a set angle.

[0031] The steel pipe feeding mechanism 12 and the die head feeding mechanism 21 are used to clamp and convey the steel pipe forward. Both the steel pipe feeding mechanism 12 and the die head feeding mechanism 21 include multiple actively rotating feeding rollers 121 and driven rollers 122 that can move up and down. The circumferential surfaces of the feeding rollers 121 and the driven rollers 122 have grooves that match the outer diameter of the steel pipe, and the steel pipe is clamped or conveyed forward between the feeding rollers 121 and the driven rollers 122. The feeding rollers 121 are driven to rotate synchronously by a gear set 123 consisting of multiple meshing feeding gears.

[0032] The pipe bending mechanism 22 is pivotally connected to the machine head 2 and includes forming rollers 221, forming pressure rollers 222, and a pitch control mechanism. The circumferential surfaces of the forming rollers 221 and 222 have grooves matching the outer diameter of the steel pipe. The forming rollers 221 and 222 are coaxially arranged with the pivot of the pipe bending mechanism 22, and the forming pressure rollers 222 are mounted on a linear guide rail 23 and move along the guide rail. The forming rollers 221 and 222 cooperate to clamp the steel pipe, and their axial movement is driven by the pitch control mechanism. The pitch control mechanism includes a servo motor 24 and a lead screw mechanism 25 (covered by a housing). The servo motor 24 drives the forming rollers 221 and 222 on both sides to move axially via the lead screw mechanism 25.

[0033] This invention enables a device to switch between two working states: bending and coiling, through a rotatable bending mechanism 2. The machine head 2 is mounted on a translation mechanism 3 to prevent interference with the steel pipe during function switching. The bending mechanism 22, pivotally connected to the machine head 2, can bend the pipe in a horizontal state; in conjunction with a pitch control mechanism, it can coil the spiral pipe in a vertical state. The steel pipe turning mechanism 13, in conjunction with the bending mechanism 22, can bend the spiral pipe in two different directions: horizontal and vertical.

[0034] The working method of the above-mentioned integrated fabrication device for internally inserted spiral tubes is characterized by including the following steps:

[0035] (1) The rotating mechanism 4 drives the head 2 to rotate, making the head feeding mechanism 21 and the bending mechanism 22 horizontal. The driven roller 122 of the steel pipe feeding mechanism 12 rises and cooperates with the feeding roller 121 to clamp the steel pipe and feed it forward to the front end of the steel pipe into the head feeding mechanism 21. The driven roller 122 of the head feeding mechanism 21 rises and cooperates with the feeding roller 121 to clamp the steel pipe. The head of the steel pipe is located between the forming roller 221 and the forming pressure roller 222. The forming pressure roller 222 moves along the linear slide rail 23 and sticks to the surface of the steel pipe. The bending mechanism 22 rotates around the pivot, and the forming pressure roller 222 pushes the steel pipe to rotate 180° along the surface of the forming roller 221 to complete the horizontal bending.

[0036] (2) The pipe bending mechanism 22 is reset. The steel pipe feeding mechanism 12, the head feeding mechanism 21, and the forming roller 221 and forming pressure roller 222 are released from clamping. The steel pipe turning mechanism 13 clamps the steel pipe and rotates it axially to make the head of the steel pipe bend horizontally and upright. The steel pipe feeding mechanism 12 and the head feeding mechanism 21 clamp the steel pipe and convey it forward a certain distance. The lower part of the horizontally bent steel pipe is located between the forming roller 221 and the forming pressure roller 222. The forming pressure roller 222 moves along the linear slide rail 23 and adheres to the surface of the steel pipe. Figure 3As shown, the pipe bending mechanism 22 rotates around the pivot, and the forming pressure roller 222 pushes the steel pipe to rotate 90° along the surface of the forming roller 221 to complete the vertical bending.

[0037] (3) The steel pipe feeding mechanism 12, the head feeding mechanism 21, and the forming roller 221 and forming pressure roller 222 are released from clamping; the translation mechanism 3 drives the head 2 to translate, and the rotation mechanism 4 drives the head 2 to rotate, so that the head feeding mechanism 21 and the bending mechanism 22 on the other side are in a vertical state. The lifting device drives the steel pipe feeding mechanism 12 and the steel pipe turning mechanism 13 on the main unit 1 to lift, so that they are at the same height as the head feeding mechanism 21 and the bending mechanism 22. The steel pipe feeding mechanism 12 clamps the steel pipe and feeds it forward until the front end of the steel pipe enters the head feeding mechanism 21 for clamping, and the steel pipe is located between the forming roller 221 and the forming pressure roller 222; the screw mechanism 25 of the pitch control mechanism drives the forming roller 221 and the forming pressure roller 222 to move axially, and the pitch is adjusted. The screw diameter is adjusted by adjusting the angle of rotation of the bending mechanism 22 around the pivot. The steel pipe feeding mechanism 12 and the die head feeding mechanism 21 clamp the steel pipe and continuously feed it to form the spiral tube. When the fixed length mechanism 11 detects that the steel pipe has been fed to the set length, it stops feeding and the preparation of the inner spiral tube is completed.

[0038] If the other end of the inner spiral pipe also has an elbow, it can still be bent in a horizontal state by using a steel pipe cornering mechanism and a pipe bending mechanism in combination, depending on the specific shape of the elbow.

Claims

1. An integrated fabrication apparatus for an internally threaded spiral tube, characterized in that: It includes a steel pipe feeding mechanism and a steel pipe turning mechanism mounted on the main unit, and a machine head feeding mechanism and a pipe bending mechanism mounted on the machine head; the machine head is mounted on the main unit via a translation mechanism; the machine head is mounted on the translation mechanism via a rotation mechanism. The steel pipe feeding mechanism is used to clamp the steel pipe and convey it forward. The steel pipe rotation mechanism is used to clamp the steel pipe and rotate it axially by a set angle. The head feeding mechanism is used to clamp the steel pipe and convey it forward. The pipe bending mechanism is pivotally connected to the machine head and includes forming rollers, forming pressure rollers, and a pitch control mechanism. The forming rollers and forming pressure rollers cooperate to clamp the steel pipe, and the forming rollers and forming pressure rollers are driven to move axially through the pitch control mechanism.

2. The integrated fabrication apparatus for the internally threaded spiral tube as described in claim 1, characterized in that: The steel pipe feeding mechanism and the steel pipe turning mechanism are mounted on the lifting device on the main unit.

3. The integrated fabrication apparatus for the internally threaded spiral tube as described in claim 2, characterized in that: Both the steel pipe feeding mechanism and the die head feeding mechanism include multiple actively rotating feeding rollers and driven rollers that can move up and down; the circumferential surfaces of the feeding rollers and driven rollers have grooves that match the outer diameter of the steel pipe, and the steel pipe is clamped or conveyed forward between the feeding rollers and driven rollers.

4. The integrated fabrication apparatus for the internally threaded spiral tube as described in claim 3, characterized in that: The feeding roller is driven to rotate synchronously by a gear set consisting of multiple meshing feeding gears.

5. The integrated fabrication apparatus for the internally threaded spiral tube as described in any one of claims 1-4, characterized in that: The forming roller and the forming pressure roller have grooves on their circumferential surfaces that match the outer diameter of the steel pipe; the forming roller is coaxially arranged with the pivot of the pipe bending mechanism, and the forming pressure roller is arranged on a linear slide rail and moves along the slide rail.

6. The integrated fabrication apparatus for the internally threaded spiral tube as described in claim 5, characterized in that: The machine head is equipped with a head feeding mechanism and a pipe bending mechanism on both sides.

7. The integrated fabrication apparatus for the internally threaded spiral tube as described in claim 6, characterized in that: The pitch control mechanism includes a servo motor and a lead screw mechanism. The servo motor drives the forming rollers and forming pressure rollers on both sides to move axially through the lead screw mechanism.

8. The integrated fabrication apparatus for the internally threaded spiral tube as described in claim 7, characterized in that: The front end of the steel pipe feeding mechanism is equipped with a length-fixing mechanism for measuring the conveying length of the steel pipe; the length-fixing mechanism is an encoder.

9. A method for operating the integrated fabrication apparatus for an internally threaded spiral tube as described in any one of claims 1-8, characterized in that... Includes the following steps: (1) The rotating mechanism drives the machine head to rotate, so that the machine head feeding mechanism and the pipe bending mechanism are in a horizontal state; the steel pipe feeding mechanism clamps the steel pipe and feeds it forward until the front end of the steel pipe enters the clamping of the machine head feeding mechanism, and the head of the steel pipe is located between the forming roller and the forming pressure roller; the pipe bending mechanism rotates around the pivot, and the forming pressure roller pushes the steel pipe to rotate 180° along the surface of the forming roller to complete the horizontal bending. (2) The bending mechanism is reset; the steel pipe feeding mechanism, the machine head feeding mechanism, and the forming roller and forming pressure roller are released from clamping; the steel pipe cornering mechanism clamps the steel pipe and rotates it axially to make the head of the steel pipe bend horizontally and stand upright; the steel pipe feeding mechanism and the machine head feeding mechanism clamp the steel pipe and convey it forward a distance, and the lower part of the horizontally bent steel pipe is located between the forming roller and the forming pressure roller; the bending mechanism rotates around the pivot, and the forming pressure roller pushes the steel pipe to rotate 90° along the surface of the forming roller to complete the bending of the vertical bend; (3) The steel pipe feeding mechanism, the head feeding mechanism, and the forming roller and forming pressure roller are released from clamping; the translation mechanism drives the head to translate, and the rotation mechanism drives the head to rotate, so that the head feeding mechanism and the bending mechanism are in a vertical state; the steel pipe feeding mechanism clamps the steel pipe and feeds it forward until the front end of the steel pipe enters the clamping of the head feeding mechanism, and the steel pipe is located between the forming roller and the forming pressure roller; the forming roller and the forming pressure roller are driven to move axially through the pitch control mechanism to adjust the pitch; the spiral diameter is adjusted by adjusting the angle of rotation of the bending mechanism around the pivot; the steel pipe feeding mechanism and the head feeding mechanism clamp the steel pipe and feed it continuously to complete the preparation of the inner spiral tube.

10. The working method of the integrated fabrication device for the internally threaded spiral tube as described in claim 9, characterized in that: The preparation of the inner spiral tube also includes bending the other end of the inner spiral tube in a horizontal state by using a steel pipe cornering mechanism and a pipe bending mechanism.

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