Pipe diameter adjusting mechanism and adjusting method thereof

Abstract

A pipe diameter adjusting mechanism and an adjusting method thereof, the pipe diameter adjusting mechanism comprising a vacuum box, a diameter measuring device and a cooling device connected in sequence, and a control device, the vacuum box being provided with a vacuum pumping device for pumping the vacuum box, the control device being electrically connected with the diameter measuring device and the vacuum pumping device respectively, the diameter measuring device being used for detecting the pipe diameter of the pipe and feeding back the detected pipe diameter to the control device, and the control device being used for controlling the vacuum pumping device to adjust the vacuum pressure of the vacuum box according to the detected pipe diameter so as to adjust the pipe diameter of the pipe. By arranging the vacuum box, the diameter measuring device and the cooling device connected in sequence and the control device, the diameter measuring device can accurately detect the current pipe diameter of the pipe, and then feed back the detected pipe diameter to the control device, and the control device can control the vacuum pumping device to adjust the vacuum pressure of the vacuum box according to the detected pipe diameter so as to adjust the pipe diameter of the pipe to reach the set pipe diameter, and the adjusted pipe diameter can accurately reach the required value.

Description

Technical Field

[0001] This invention relates to the field of pipe manufacturing technology, and in particular to a pipe diameter adjustment mechanism and its adjustment method. Background Technology

[0002] During pipe production, the pipes need to be transported to a vacuum chamber for vacuum shaping. During vacuum shaping, the pipe diameter can be adjusted by changing the vacuum pressure of the chamber to achieve the required value. However, existing equipment cannot detect the pipe diameter. Therefore, after adjusting the pipe diameter, the actual diameter may not reach the required value, potentially resulting in significant errors.

[0003] Therefore, further improvements are necessary. Summary of the Invention

[0004] The purpose of this invention is to provide a pipe diameter adjustment mechanism and method that is simple in structure, accurate in detection and adjustment, highly efficient in production, and practical, so as to overcome the shortcomings of the prior art.

[0005] A pipe diameter adjustment mechanism designed for this purpose is characterized by comprising a vacuum chamber, a diameter measuring device, a cooling device, and a control device connected in sequence. The vacuum chamber is equipped with a vacuum pumping device for evacuating the vacuum chamber. The control device is electrically connected to the diameter measuring device and the vacuum pumping device. The diameter measuring device is used to detect the pipe diameter and feed the detected pipe diameter back to the control device. The control device controls the vacuum pumping device to adjust the vacuum pressure of the vacuum chamber according to the detected pipe diameter, so as to adjust the pipe diameter.

[0006] The diameter measuring device includes a light-emitting component, a reflective component, a receiving component, and several lenses. The diameter measuring device is provided with a port for the pipe to pass through, and the lenses are located around the port. The receiving component is electrically connected to a control device.

[0007] The diameter measuring device is equipped with an operation screen for displaying the set pipe diameter and the current pipe diameter. The operation screen is equipped with several operation buttons, and the control device is electrically connected to the operation screen.

[0008] The inlet is equipped with several sets of first guide rollers for guiding the pipe forward.

[0009] The vacuum chamber is equipped with several pressure detection components for detecting the vacuum pressure inside the chamber, and the control device is electrically connected to the pressure detection components.

[0010] The vacuum chamber contains several interconnected vacuum chambers, which together form a channel for the pipe to pass through.

[0011] The vacuum pumping device includes a vacuum pump, a connecting pipe, and a venting box. The vacuum pump is connected to the venting box through the connecting pipe, and the venting box is connected to the vacuum chamber. The control device is electrically connected to the vacuum pump.

[0012] The bottom of the vacuum chamber has several first through holes corresponding to the position of the ventilation chamber, and the ventilation chamber is connected to the vacuum chamber through the first through holes; The top of the vacuum chamber is provided with an opening, and a top cover for opening or closing the vacuum chamber is provided on the opening.

[0013] The cooling device contains several sequentially connected cooling chambers, which together form a channel for the pipe to pass through; the cooling device also contains several sets of second guide rollers to guide the pipe forward.

[0014] A method for adjusting a pipe diameter adjustment mechanism designed for this purpose, characterized by the following steps: 1) Set the target pipe diameter; 2) Based on the target pipe diameter, the control device adopts PID control to control the vacuum pumping device to initially adjust the vacuum pressure of the vacuum chamber; 3) After the pipe passes through the vacuum chamber, it arrives at the diameter measuring device. The diameter measuring device detects the current pipe diameter in real time and sends the detected pipe diameter data to the control device. 4) After receiving the detected pipe diameter data, the control device compares the detected pipe diameter with the target pipe diameter. If the two are inconsistent, the control device uses PID control to control the vacuum pumping device to adjust the vacuum pressure of the vacuum chamber, thereby adjusting the pipe diameter. 5) Repeat steps 3) and 4 continuously.

[0015] The pipe diameter adjustment mechanism of the present invention comprises a vacuum chamber, a diameter measuring device, a cooling device, and a control device connected in sequence. The diameter measuring device can accurately detect the current pipe diameter and then feed the detected pipe diameter back to the control device. The control device controls the vacuum pumping device to adjust the vacuum pressure of the vacuum chamber according to the detected pipe diameter, so as to adjust the pipe diameter to reach the set pipe diameter. Moreover, the adjusted pipe diameter can accurately reach the required value, which greatly improves the quality of the product. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the adjustment mechanism in one embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the overall structure of the vacuum chamber in one embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the overall structure of the vacuum chamber from another position in one embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the overall structure of the third position of the vacuum chamber in one embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of the overall structure of the cooling device in one embodiment of the present invention.

[0021] Figure 6 This is a schematic diagram of the overall structure of the cooling device from another position in one embodiment of the present invention.

[0022] Figure 7 This is a schematic diagram of the overall structure of the diameter measuring device in one embodiment of the present invention.

[0023] Figure 8 This is a schematic diagram of the overall structure of the diameter measuring device from another angle in one embodiment of the present invention.

[0024] Figure 9 This is a partial structural diagram of the diameter measuring device in one embodiment of the present invention.

[0025] Figure 10 This is a schematic diagram illustrating the adjustment principle of the pipe diameter adjustment mechanism in one embodiment of the present invention. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] See Figures 1-10 The pipe diameter adjustment mechanism includes a vacuum chamber 1, a diameter measuring device 2, a cooling device 3, and a control device 4 connected in sequence. The bottom of the vacuum chamber 1 is equipped with a vacuum pumping device 5 for evacuating the vacuum chamber 1. The control device 4 is electrically connected to the diameter measuring device 2 and the vacuum pumping device 5. The diameter measuring device 2 is used to detect the current pipe diameter of the pipe 6 and feed the detected pipe diameter back to the control device 4. The control device 4 controls the vacuum pumping device 5 to adjust the vacuum pressure of the vacuum chamber 1 according to the detected pipe diameter, so as to adjust the pipe diameter of the pipe 6 to reach the set pipe diameter. Adjusting the pipe diameter of the pipe 6 by adjusting the vacuum pressure of the vacuum chamber 1 is the prior art (such as patent CN120941686A), which will not be described in detail here.

[0028] The diameter measuring device 2 includes a light-emitting component 7, a reflective component 8, a receiving component 9, and several lenses 10. The diameter measuring device 2 is provided with a through-hole 11 for the pipe 6 to pass through, and the lenses 10 are located around the through-hole 8. The receiving component 9 is electrically connected to the control device 4. The light-emitting component 7 is a laser, which is respectively set on both sides of the through-hole 8. The reflective component 8 is a prism, which is respectively set on both sides of the through-hole 8. The receiving component 9 is a receiver, which is respectively set on both sides of the through-hole 8. The lenses 10 include an X-axis lens 24 and a Y-axis lens 25. The laser beam is emitted by the light-emitting component 7, and the laser beam is reflected back by the reflective component 8. The reflected laser beam passes through the lenses 10 and reaches the receiving component 9. The receiving component 9 receives the reflected laser beam and calculates the diameter or diameter change of the pipe 6, thereby detecting the current diameter of the pipe 6. The function of the lenses 10 is to refocus the laser beam after it is reflected by the object, thereby improving the accuracy of the laser measurement.

[0029] The diameter measuring device 2 is equipped with an operation screen 20 for displaying the set pipe diameter and the current pipe diameter. The operation screen 20 is equipped with several operation buttons 21. The control device 4 is electrically connected to the operation screen 20. The set pipe diameter is input through the operation buttons 21 and displayed on the operation screen 20. The diameter measuring device 2 detects the current pipe diameter of the pipe 6 and displays it on the operation screen 20.

[0030] The control device 4 includes an electrical control box and a control circuit board installed inside the electrical control box. The control circuit board is electrically connected to the operation panel 20, the receiving component 9, the vacuum pump 15, and the pressure detection component 13.

[0031] The inlet 11 is provided with several sets of first guide rollers 12 for guiding the pipe 6 forward.

[0032] The vacuum chamber 1 is equipped with several pressure detection components 13 for detecting the vacuum pressure inside the vacuum chamber 1. The control device 4 is electrically connected to the pressure detection components 13, which are vacuum pressure gauges. The pressure detection components 13 feed back the detected vacuum pressure value to the control device 4. The control device 4 controls the vacuum pumping device 5 to adjust the vacuum pressure of the vacuum chamber 1 according to the detected vacuum pressure value so that it reaches the required vacuum pressure value.

[0033] The vacuum chamber 1 is provided with several vacuum chambers 14 connected in sequence, and the several vacuum chambers 14 together form a channel for the pipe 6 to pass through; the vacuum chamber 1 is used to vacuum shape the pipe 6; a sizing sleeve (not shown in the figure) is provided in the vacuum chamber 14 for the pipe 6 to pass through. Through the vacuum adsorption effect, the outer surface of the pipe 6 extruded at high temperature is tightly attached to the inner wall of the sizing sleeve, thereby accurately controlling the outer diameter and geometry of the pipe 6.

[0034] The vacuum pumping device 5 includes a vacuum pump 15, a connecting pipe 16, and a ventilation box 17. The vacuum pump 15 is connected to the ventilation box 17 through the connecting pipe 16. The ventilation box 17 is connected to one of the vacuum chambers 14. More than one vacuum pumping device 5 is provided. The control device 4 is electrically connected to the vacuum pump 15. When the vacuum pump 15 is working, it evacuates the vacuum chamber 14. The control device 4 adjusts the vacuum pressure of the vacuum box 1 by controlling the pumping speed of the vacuum pump 15.

[0035] The bottom of the vacuum chamber 1 is provided with several first through holes 18 corresponding to the position of the ventilation chamber 17. The ventilation chamber 17 is connected to the vacuum chamber 14 through the first through holes 18.

[0036] The top of the vacuum chamber 14 is provided with an open opening, and a top cover 19 for opening or closing the vacuum chamber 14 is provided on the open opening; when the vacuum box 1 is evacuating, the vacuum chamber 14 is closed by the top cover 19, and when the vacuum box 1 stops working, the vacuum chamber 14 is opened by the top cover 19.

[0037] The cooling device 3 has several sequentially connected cooling chambers 22, which together form a channel for the pipe 6 to pass through. The cooling device 3 also has several sets of second guide wheels 23 for guiding the pipe 6 forward. The second guide wheels 23 are located between two adjacent cooling chambers 22. The cooling device 3 is a water tank used to cool the pipe 6. The bottom of the cooling device 3 has a water inlet assembly 26, which includes a water inlet pump 27 and a water inlet tank 28. The outlet of the water inlet pump 27 is connected to the water inlet tank 28. The bottom of the cooling device 3 has several second through holes 29 corresponding to the position of the water inlet tank 28. The water inlet tank 28 is connected to one of the cooling chambers 22 through the second through holes 29. The water inlet pump 27 draws external water into the cooling chamber 22. The control device 4 (control circuit board) is electrically connected to the water inlet pump 27.

[0038] The diameter measuring device 2 is located at the outlet of the vacuum chamber 1 and at the inlet of the cooling device 3. The diameter measuring device 2 is a diameter measuring instrument, which includes a diameter measuring body 30 and a support base 31. The bottom of the diameter measuring body 30 is mounted on the support base 31. The port 11 is located on the diameter measuring body 30. The light-emitting component 7, the reflective component 8, the receiving component 9 and the lens 10 are located inside the diameter measuring body 30. The operation screen 20 is located on the top of the diameter measuring body 30.

[0039] The adjustment method of this pipe diameter adjustment mechanism includes the following steps: 1) Set the target pipe diameter; 2) Based on the target pipe diameter, the control device 4 adopts a PID cascade control method to control the vacuum pumping device 5 to initially adjust the vacuum pressure of the vacuum chamber 1; 3) After passing through the vacuum box 1, the pipe 6 reaches the diameter measuring device 2. The diameter measuring device 2 detects the current pipe diameter of the pipe 6 in real time and sends the detected pipe diameter data to the control device 4. 4) After receiving the detected pipe diameter data, the control device 4 compares the detected pipe diameter with the target pipe diameter. If the two are inconsistent, the control device 4 adopts PID cascade control mode to control the vacuum pumping device 5 to adjust the vacuum pressure of the vacuum box 1, thereby adjusting the pipe diameter of the pipe 6 to reach the target pipe diameter. 5) Repeat steps 3) and 4) until pipe 6 is produced.

[0040] The above describes the preferred embodiments of the present invention, illustrating and describing the basic principles, main features, and advantages of the invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pipe diameter adjustment mechanism, characterized in that: The device includes a vacuum chamber (1), a diameter measuring device (2), a cooling device (3), and a control device (4) connected in sequence. The vacuum chamber (1) is equipped with a vacuum pumping device (5) for evacuating the vacuum chamber (1). The control device (4) is electrically connected to the diameter measuring device (2) and the vacuum pumping device (5). The diameter measuring device (2) is used to detect the diameter of the pipe (6) and feed the detected diameter back to the control device (4). The control device (4) controls the vacuum pumping device (5) to adjust the vacuum pressure of the vacuum chamber (1) according to the detected pipe diameter, so as to adjust the diameter of the pipe (6).

2. The pipe diameter adjustment mechanism according to claim 1, characterized in that: The diameter measuring device (2) includes a light-emitting component (7), a reflective component (8), a receiving component (9) and several lenses (10). The diameter measuring device (2) is provided with a port (11) for the pipe (6) to pass through. The lenses (10) are located around the port (8). The receiving component (9) is electrically connected to the control device (4).

3. The pipe diameter adjustment mechanism according to claim 1, characterized in that: The diameter measuring device (2) is equipped with an operation screen (20) for displaying the set pipe diameter and the current pipe diameter. The operation screen (20) is equipped with several operation buttons (21). The control device (4) is electrically connected to the operation screen (20).

4. The pipe diameter adjustment mechanism according to claim 1, characterized in that: The inlet (11) is provided with several sets of first guide rollers (12) for guiding the pipe (6) forward.

5. The pipe diameter adjustment mechanism according to claim 1, characterized in that: The vacuum chamber (1) is equipped with several pressure detection components (13) for detecting the vacuum pressure inside the vacuum chamber (1), and the control device (4) is electrically connected to the pressure detection components (13).

6. The pipe diameter adjustment mechanism according to claim 1, characterized in that: The vacuum chamber (1) is provided with several vacuum chambers (14) connected in sequence, and the several vacuum chambers (14) together form a channel for the pipe (6) to pass through.

7. The pipe diameter adjustment mechanism according to claim 6, characterized in that: The vacuum pumping device (5) includes a vacuum pump (15), a connecting pipe (16) and a ventilation box (17). The vacuum pump (15) is connected to the ventilation box (17) through the connecting pipe (16), and the ventilation box (17) is connected to the vacuum chamber (14). The control device (4) is electrically connected to the vacuum pump (15).

8. The pipe diameter adjustment mechanism according to claim 6, characterized in that: The bottom of the vacuum box (1) is provided with several first through holes (18) corresponding to the position of the ventilation box (17), and the ventilation box (17) is connected to the vacuum chamber (14) through the first through holes (18). The top of the vacuum chamber (14) is provided with an opening, and a top cover (19) for opening or closing the vacuum chamber (14) is provided on the opening.

9. The pipe diameter adjustment mechanism according to claim 1, characterized in that: The cooling device (3) is provided with several cooling chambers (22) connected in sequence, and the several cooling chambers (22) together form a channel for the pipe (6) to pass through; the cooling device (3) is provided with several sets of second guide wheels (23) for guiding the pipe (6) to be transported forward.

10. The adjustment method of the pipe diameter adjustment mechanism as described in any one of claims 1-9, characterized in that: Includes the following steps: 1) Set the target pipe diameter; 2) According to the target pipe diameter, the control device (4) adopts PID control mode to control the vacuum device (5) to initially adjust the vacuum pressure of the vacuum box (1); 3) After passing through the vacuum box (1), the pipe (6) arrives at the diameter measuring device (2). The diameter measuring device (2) detects the current pipe diameter of the pipe (6) in real time and sends the detected pipe diameter data to the control device (4). 4) After receiving the detected pipe diameter data, the control device (4) compares the detected pipe diameter with the target pipe diameter. If the two are inconsistent, the control device (4) adopts PID control mode to control the vacuum device (5) to adjust the vacuum pressure of the vacuum box (1), thereby adjusting the pipe diameter of the pipe (6). 5) Repeat steps 3) and 4 continuously.

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