Internal-penetrating spiral pipe integrated manufacturing device and working method thereof

Abstract

An internally-penetrating spiral pipe integrated manufacturing device comprises a steel pipe feeding mechanism, a steel pipe turning mechanism, a machine head feeding mechanism and a pipe bending mechanism, wherein the steel pipe feeding mechanism and the steel pipe turning mechanism are arranged on a main machine, and the machine head feeding mechanism and the pipe bending mechanism are arranged on a machine head. The machine head is arranged on the main machine through a translation mechanism; the machine head is arranged on the translation mechanism through the rotating mechanism; the steel pipe feeding mechanism and the machine head feeding mechanism are used for clamping steel pipes and conveying the steel pipes forwards. The steel pipe turning mechanism is used for clamping a steel pipe to axially rotate by a set angle; the pipe bending mechanism is connected to the machine head in a pivoted mode and comprises a forming roller for clamping a steel pipe, a forming pressing wheel and a screw pitch control mechanism, and the forming roller and the forming pressing wheel are driven by the screw pitch control mechanism to move axially. The working method of the internally-penetrating spiral pipe integrated manufacturing device comprises the steps of horizontal bending, vertical bending, spiral pipe coiling and the like. According to the invention, the preparation of the internal penetrating spiral pipe can be completed on one device, the utilization rate of the device is improved, the manufacturing cost is saved, and the working efficiency and the product quality are also greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of steel pipe processing equipment, and particularly relates to an integrated preparation device for internally threaded spiral pipes capable of completing the preparation of internally threaded spiral pipes on one device and its working method. Background Art

[0002] In the heat exchange device of a heat exchanger, an internally threaded spiral pipe as shown in Figure 1 is often used, where the pipe head joint is located inside the spiral of the spiral pipe. In the prior art, the preparation of such an internally threaded spiral pipe first requires bending the head elbow of the spiral pipe on a pipe bender, and then winding the spiral on a spiral pipe bending device for the steel pipe. The steel pipe needs to be transferred between two different devices, resulting in low production efficiency and low utilization rate of the production workshop space. Summary of the Invention

[0003] The purpose of the present invention is to provide an integrated preparation device for internally threaded spiral pipes capable of completing the preparation of internally threaded spiral pipes on one device and its working method in view of the defects existing in the prior art preparation of internally threaded spiral pipes.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions: An integrated preparation device for internally threaded spiral pipes, characterized in that: it includes a steel pipe feeding mechanism and a steel pipe cornering mechanism arranged on the main machine, and a head feeding mechanism and a pipe bending mechanism arranged on the machine head; the machine head is arranged on the main machine through a translation mechanism; the machine head is arranged on the translation mechanism through a rotation mechanism; The steel pipe feeding mechanism is used for clamping and feeding the steel pipe forward; The steel pipe cornering mechanism is used for clamping and axially rotating the steel pipe by a set angle; The head feeding mechanism is used for clamping and feeding the steel pipe forward; The pipe bending mechanism is pivotally connected to the machine head, and includes a forming roller, a forming pressure wheel and a pitch control mechanism. The forming roller and the forming pressure wheel cooperate to clamp the steel pipe, and the forming roller and the forming pressure wheel are driven to axially move through the pitch control mechanism.

[0005] By rotating the pipe bending mechanism, the device can be switched between two working states of pipe bending and coiling. The machine head is arranged on the translation mechanism to prevent interference with the steel pipe during the function switching process. The pipe bending mechanism pivotally connected to the machine head can bend the elbow in the horizontal state; the pipe bending mechanism cooperating with the pitch control mechanism can coil the spiral pipe in the vertical state. The steel pipe cornering mechanism cooperating with the pipe bending mechanism can bend elbows in two different directions of horizontal bend and vertical bend of the internally threaded spiral pipe.

[0006] It is further characterized in that: the steel pipe feeding mechanism and the steel pipe cornering mechanism are arranged on the lifting device of the main machine. The up and down positions of the steel pipe feeding mechanism and the steel pipe cornering mechanism are adjusted by the lifting device so that they are kept at the same height as the head feeding mechanism and the pipe bending mechanism in different working states.

[0007] Furthermore: both the steel pipe feeding mechanism and the head feeding mechanism include a plurality of actively rotating feeding rollers and driven rollers that can move up and down; the circumferential surfaces of the feeding rollers and the driven rollers have grooves matching the outer diameter of the steel pipe, and the steel pipe is clamped or conveyed forward between the feeding rollers and the driven rollers. The clamping and conveying of the steel pipe and the release of the clamping are realized 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 a greater frictional force for the clamping of the steel pipe, facilitating the clamping and conveying of the steel pipe.

[0008] Preferably: the feeding rollers are driven to rotate synchronously by a gear set composed of a plurality of meshing feeding gears.

[0009] Preferably: the circumferential surfaces of the forming rollers and the forming pressure wheels have grooves matching the outer diameter of the steel pipe; the forming rollers are coaxially arranged with the pivot of the pipe bending mechanism, and the forming pressure wheels are arranged on a linear slide rail and move along the slide rail. The movement of the forming pressure wheels realizes the clamping and positioning of the steel pipe. The coaxial arrangement of the forming rollers and the pivot of the pipe bending mechanism ensures that when the pipe bending mechanism rotates around the pivot, the relative position remains unchanged, while the rotation of the pipe bending mechanism around the pivot drives the relative position change between the forming pressure wheels and the forming rollers, realizing the control of the spiral diameter during pipe bending and spiral pipe coiling.

[0010] Preferably: the head feeding mechanism and the pipe bending mechanism are arranged mirror-symmetrically on both sides of the head. The mirror-symmetrically arranged head feeding mechanism and pipe bending mechanism can be respectively used for pipe bending and spiral pipe coiling, and can also realize the coiling of spiral pipes with different spiral directions, improving the use efficiency of the equipment.

[0011] Preferably: the pitch control mechanism includes a servo motor and a lead screw mechanism, and the servo motor drives the forming rollers and the forming pressure wheels on both sides to move axially through the lead screw mechanism. The axial movement of the forming rollers and the forming pressure wheels on both sides is realized through a set of transmission mechanisms to adjust the pitch, improving the utilization rate of the equipment and saving the manufacturing cost.

[0012] Preferably: a length determination mechanism is arranged at the front end of the steel pipe feeding mechanism for measuring the conveying length of the steel pipe; the length determination mechanism is an encoder. The steel pipe is conveyed with length measurement by the encoder, thereby ensuring the dimensional accuracy of the final product and improving the product quality.

[0013] A working method of the above-mentioned integrated preparation device for internally threaded spiral pipes is characterized by including the following steps: (1) The rotating mechanism drives the machine head to rotate, making the feeding mechanism of the machine head and the pipe bending mechanism 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 feeding mechanism of the machine head, and the head of the steel pipe is located between the forming roller and the forming pressure wheel; the pipe bending mechanism rotates around the pivot, and the forming pressure wheel pushes the steel pipe to rotate 180° along the surface of the forming roller to complete the bending of the horizontal bend. (2) The pipe bending mechanism resets; the steel pipe feeding mechanism, the feeding mechanism of the machine head, and the forming roller and the forming pressure wheel release the clamping; the steel pipe rotation angle mechanism clamps the steel pipe and rotates axially to make the head of the steel pipe stand upright horizontally; the steel pipe feeding mechanism and the feeding mechanism of the machine head clamp the steel pipe and feed it forward for a certain distance, and the lower part of the horizontal bend of the steel pipe is located between the forming roller and the forming pressure wheel; the pipe bending mechanism rotates around the pivot, and the forming pressure wheel 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 feeding mechanism of the machine head, and the forming roller and the forming pressure wheel release the clamping; the translation mechanism drives the machine head to translate, and the rotating mechanism drives the machine head to rotate, making the feeding mechanism of the machine head and the pipe bending mechanism 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 feeding mechanism of the machine head, and the steel pipe is located between the forming roller and the forming pressure wheel; the forming roller and the forming pressure wheel are driven to move axially through the pitch control mechanism to adjust the pitch; the spiral diameter is adjusted by adjusting the angle of the pipe bending mechanism rotating around the pivot; the steel pipe feeding mechanism and the feeding mechanism of the machine head clamp the steel pipe and continue to feed to complete the preparation of the inner spiral pipe.

[0014] Preferably, the preparation of the inner spiral pipe further includes that the other end elbow of the inner spiral pipe is bent in a horizontal state by the cooperation of the steel pipe rotation angle mechanism and the pipe bending mechanism.

[0015] The present invention realizes the switching between two working states of pipe bending and coil winding by a rotating pipe bending mechanism. The pipe bending mechanism pivotally connected to the machine head can realize the bending of the elbow in a horizontal state; the pipe bending mechanism cooperating with the pitch control mechanism can realize the coiling of the spiral pipe in a vertical state. The steel pipe rotation angle mechanism cooperating with the pipe bending mechanism can realize the bending of the elbows in two different directions of the horizontal bend and the vertical bend of the inner spiral pipe. The pipe bending mechanism rotating around the pivot can realize the adjustment of the spiral diameter. The pitch is adjusted by the lateral movement of the pipe bending mechanism. The present invention can realize the preparation of the inner spiral pipe on one device, improve the utilization rate of the device, save the manufacturing cost, and also greatly improve the working efficiency and product quality. Description of the Drawings

[0016] Figure 1 is a schematic diagram of the inner spiral pipe.

[0017] Figure 2 is a schematic structural diagram of the integrated preparation device for the inner spiral pipe.

[0018] Figure 3 is a schematic diagram of the bending state of the pipe bending part of the inner spiral pipe. Specific Embodiment

[0019] As Figure 2 、 3 shown, an integrated preparation device for an internally threaded spiral pipe includes a length measuring mechanism 11, a steel pipe feeding mechanism 12, and a steel pipe cornering mechanism 13 provided on a main machine 1. Two sets of head feeding mechanisms 21 and pipe bending mechanisms 22 are mirror - arranged on both sides of a head 2. The head 2 is arranged on the main machine 1 through a translation mechanism 3; the head 2 is arranged on the translation mechanism 3 through a rotation mechanism 4.

[0020] The length measuring mechanism 11, the steel pipe feeding mechanism 12, and the steel pipe cornering mechanism 13 are arranged on a lifting device on the main machine 1.

[0021] The length measuring mechanism 11 is an encoder for measuring the conveying length of the steel pipe.

[0022] The steel pipe cornering mechanism 13 is used to clamp and axially rotate the steel pipe by a set angle.

[0023] The steel pipe feeding mechanism 12 and the head feeding mechanism 21 are used to clamp and forwardly convey the steel pipe. Both the steel pipe feeding mechanism 12 and the head feeding mechanism 21 include a plurality of actively rotating feeding rollers 121 and vertically movable driven rollers 122. The circumferential surfaces of the feeding rollers 121 and the driven rollers 122 have grooves matching the outer diameter of the steel pipe, and the steel pipe is clamped or forwardly conveyed between the feeding rollers 121 and the driven rollers 122. The feeding rollers 121 are driven to rotate synchronously by a gear set 123 composed of a plurality of meshing feeding gears.

[0024] The pipe bending mechanism 22 is pivotally connected to the head 2 and includes a forming roller 221, a forming pressure wheel 222, and a pitch control mechanism. The circumferential surfaces of the forming roller 221 and the forming pressure wheel 222 have grooves matching the outer diameter of the steel pipe. The forming roller 221 is coaxially arranged with the pivot of the pipe bending mechanism 22, and the forming pressure wheel 222 is arranged on a linear slide rail 23 and moves along the slide rail. The forming roller 221 and the forming pressure wheel 222 cooperate to clamp the steel pipe, and the forming roller 221 and the forming pressure wheel 222 are driven to axially move through the pitch control mechanism. The pitch control mechanism includes a servo motor 24 and a lead screw mechanism 25 (covered by a housing), and the servo motor 24 drives the forming rollers 221 and the forming pressure wheels 222 on both sides to axially move through the lead screw mechanism 25.

[0025] The present invention realizes the switching between two working states of a device, namely the elbow bending state and the coil winding state, through a rotatable elbow bending mechanism 2. The machine head 2 is arranged on a translation mechanism 3 to prevent interference with the steel pipe during the function switching process. The elbow bending mechanism 22 pivotally connected to the machine head 2 can bend the elbow in the horizontal state; the elbow bending mechanism 22 cooperates with a pitch control mechanism to wind the spiral pipe in the vertical state. The steel pipe corner mechanism 13 cooperates with the elbow bending mechanism 22 to bend elbows in two different directions, namely the horizontal bend and the vertical bend of the inner-passed spiral pipe.

[0026] The working method of the above-mentioned integrated preparation device for the inner-passed spiral pipe is characterized by including the following steps: (1) The rotation mechanism 4 drives the machine head 2 to rotate, making the machine head feeding mechanism 21 and the elbow bending mechanism 22 in a horizontal state. The driven roller 122 of the steel pipe feeding mechanism 12 rises, and cooperates with the feeding roller 121 to jointly clamp the steel pipe and feed it forward until the front end of the steel pipe enters the machine head feeding mechanism 21. The driven roller 122 of the machine head feeding mechanism 21 rises, and cooperates with the feeding roller 121 to jointly clamp the steel pipe. The head of the steel pipe is located between the forming roller 221 and the forming pressure wheel 222. The forming pressure wheel 222 moves along the linear slide rail 23 and adheres to the surface of the steel pipe. The elbow bending mechanism 22 rotates around the pivot, and the forming pressure wheel 222 pushes the steel pipe to rotate 180° along the surface of the forming roller 221 to complete the bending of the horizontal bend.

[0027] (2) The elbow bending mechanism 22 resets. The steel pipe feeding mechanism 12, the machine head feeding mechanism 21, and the forming roller 221 and the forming pressure wheel 222 release the clamping. The steel pipe corner mechanism 13 clamps the steel pipe and rotates axially to make the horizontal bend of the steel pipe head upright. The steel pipe feeding mechanism 12 and the machine head feeding mechanism 21 clamp the steel pipe and convey it forward for a certain distance. The steel pipe below the horizontal bend is located between the forming roller 221 and the forming pressure wheel 222. The forming pressure wheel 222 moves along the linear slide rail 23 and adheres to the surface of the steel pipe. As Figure 3 shown, the elbow bending mechanism 22 rotates around the pivot, and the forming pressure wheel 222 pushes the steel pipe to rotate 90° along the surface of the forming roller 221 to complete the bending of the vertical bend.

[0028] (3) The steel pipe feeding mechanism 12, the head feeding mechanism 21, and the forming rollers 221 and the forming pressure wheels 222 release the 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 pipe 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 cornering mechanism 13 on the main machine 1 to lift, so that they are at the same height as the head feeding mechanism 21 and the pipe 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 rollers 221 and the forming pressure wheels 222; the lead screw mechanism 25 of the pitch control mechanism drives the forming rollers 221 and the forming pressure wheels 222 to move axially to adjust the pitch. The spiral diameter is adjusted by adjusting the angle of rotation of the pipe bending mechanism 22 around the pivot. The steel pipe feeding mechanism 12 and the head feeding mechanism 21 clamp the steel pipe and continue to feed to wind the spiral pipe. When the fixed length mechanism 11 detects that the steel pipe is fed to the set length, the feeding is stopped, and the preparation of the inner-wound spiral pipe is completed.

[0029] If the other end of the inner-wound spiral pipe also has an elbow, it is still possible to bend it in a horizontal state by cooperating with the steel pipe cornering mechanism and the pipe bending mechanism according to the specific shape of the elbow.

Claims

1. An integrated preparation device for an internally threaded spiral tube, characterized in that: It includes a steel pipe feeding mechanism and a steel pipe cornering mechanism arranged on the main body, and a head feeding mechanism and a pipe bending mechanism arranged on the head; the head is arranged on the main body through a translation mechanism; the head is arranged on the translation mechanism through a rotation mechanism; The steel pipe feeding mechanism is used for clamping the steel pipe and feeding it forward; The steel pipe cornering mechanism is used for clamping the steel pipe and axially rotating it by a set angle; The head feeding mechanism is used for clamping the steel pipe and feeding it forward; The pipe bending mechanism is pivotally connected to the head, and includes a forming roller, a forming pressure wheel and a pitch control mechanism. The forming roller and the forming pressure wheel cooperate to clamp the steel pipe, and the forming roller and the forming pressure wheel are driven to axially move through the pitch control mechanism.

2. The integrated preparation device for the internally penetrating spiral tube according to claim 1, characterized in that: The steel pipe feeding mechanism and the steel pipe cornering mechanism are arranged on a lifting device on the main body.

3. The integrated preparation device for the internally threaded spiral tube according to claim 2, characterized in that: Both the steel pipe feeding mechanism and the head feeding mechanism include a plurality of actively rotating feeding rollers and a driven roller that can move up and down; the circumferential surfaces of the feeding rollers and the driven roller have grooves matching the outer diameter of the steel pipe, and the steel pipe is clamped or fed forward between the feeding rollers and the driven roller.

4. The integrated preparation device for the internally threaded spiral tube according to claim 3, characterized in that: The feeding rollers are driven to rotate synchronously by a gear set composed of a plurality of meshing feeding gears.

5. The integrated preparation device for the internally penetrating spiral tube according to any one of claims 1-4, characterized in that: The circumferential surfaces of the forming roller and the forming pressure wheel have grooves matching 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 wheel is arranged on a linear slide rail and moves along the slide rail.

6. The integrated preparation device for the inner helical tube according to claim 5, characterized in that: The head feeding mechanism and the pipe bending mechanism are arranged symmetrically on both sides of the head.

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

8. The integrated preparation device for the internally threaded spiral tube according to claim 7, wherein: A fixed-length mechanism is arranged at the front end of the steel pipe feeding mechanism for measuring the feeding length of the steel pipe; the fixed-length mechanism is an encoder.

9. A working method of the integrated preparation device for the internally threaded spiral tube according to any one of claims 1-8, characterized in that It includes the following steps: (1) The rotation mechanism drives the head to rotate so that the 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 head feeding mechanism, and the head of the steel pipe is located between the forming roller and the forming pressure wheel; the pipe bending mechanism rotates around the pivot, and the forming pressure wheel pushes the steel pipe to rotate 180° along the surface of the forming roller to complete the bending of the horizontal bend; (2) The pipe bending mechanism returns to its original position; the steel pipe feeding mechanism, the head feeding mechanism, and the forming roller and the forming pressure wheel release the clamping; the steel pipe cornering mechanism clamps the steel pipe and axially rotates it to make the head of the horizontal bend stand upright; the steel pipe feeding mechanism and the head feeding mechanism clamp the steel pipe and feed it forward for a certain distance, and the steel pipe at the lower part of the horizontal bend is located between the forming roller and the forming pressure wheel; the pipe bending mechanism rotates around the pivot, and the forming pressure wheel pushes the steel pipe to rotate 90° along the surface of the forming roller to complete the bending of the vertical bend; (3) Steel pipe feeding mechanism, head feeding mechanism, and the forming rollers and forming pressure wheels release the clamping; the translation mechanism drives the head to translate, and the rotation mechanism drives the head to rotate, making the head feeding mechanism and the pipe bending mechanism perpendicular; 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 rollers and the forming pressure wheels; the forming rollers and the forming pressure wheels are driven to move axially by the pitch control mechanism to adjust the pitch; the spiral diameter is adjusted by adjusting the angle of rotation of the pipe bending mechanism around the pivot; the steel pipe feeding mechanism and the head feeding mechanism clamp the steel pipe and continue to feed to complete the preparation of the inner spiral pipe.

10. The working method of the integrated preparation device for the internally threaded spiral tube according to claim 9, characterized in that: The preparation of the inner spiral pipe further includes that the other end elbow of the inner spiral pipe is bent in a horizontal state by the cooperation of the steel pipe corner mechanism and the pipe bending mechanism.

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