Automatic sealing ring device of large diameter spiral welded pipe hydraulic press

Abstract

An automatic sealing ring fitting device for a large-diameter spiral welded pipe hydraulic press includes a sealing platform, an axis determining mechanism, a centering drive, and a control unit. The sealing platform is located between the hydraulic press side seal and the end of the spiral welded pipe, serving to support and fix the sealing ring. The axis determining mechanism is used to calculate and determine the height H of the spiral welded pipe's central axis relative to the hydraulic press foundation based on the diameter of the spiral welded pipe to be tested. O The centering drive is used to move the sealing ring to align the center of the sealing ring with the central axis of the spiral welded pipe; the control unit is used to control the centering drive to position the center of the sealing ring on the central axis of the spiral welded pipe according to the axis determination result, so as to achieve coaxial positioning of the center of the sealing ring and the central axis of the spiral welded pipe.

Description

An automatic sealing ring fitting device for a large-diameter spiral welded pipe hydraulic press Technical Field

[0001] This invention relates to the field of spiral welded pipe manufacturing technology, specifically to an automatic sealing ring fitting device for a large-diameter spiral welded pipe hydraulic press. Background Technology

[0002] Hydrostatic testing of steel pipes is an indispensable inspection method for product quality inspection in spiral welded pipe units, and the pipe end seal is a crucial link in the success or failure of the entire test. According to GB9711-88 and API standards, the test pressure should be 90% of the minimum yield strength. There are two types of pipe end seals: face seals and radial seals. Since radial seals require an additional grinding process on the inner wall of the pipe end, face seals are more commonly used. Face seals include flat plate seals and annular groove seals, each with unacceptable defects in practical operation.

[0003] The existing technology has the following technical problems:

[0004] (1) Flat plate seal, manual installation of the sealing ring is time-consuming and labor-intensive.

[0005] To save on labor costs, the company basically uses one hydraulic press and one operator. The entire process of pressing the rubber ring requires one person. For rubber rings weighing tens of kilograms, it is very strenuous for one person because they are large, soft, and difficult to operate.

[0006] (2) For the round groove type sealing head, different sealing heads need to be replaced for different pipe diameters.

[0007] Large-diameter spiral welded pipes require different rubber rings for water pressure testing, ranging from smaller diameters like 529mm to larger ones like 2020mm. Furthermore, the large volume and variety of pipe orders, often involving changes in the diameter of the spiral welded pipes, present challenges for the water pressure testing. This necessitates frequent replacement of the sealing head, significantly reducing production efficiency.

[0008] Therefore, there is an urgent need in this field for a hydrostatic testing machine that uses a flat end seal, eliminates the need to replace the test head, and automatically seals the pipe end with sealing rings of different diameters. The sealing rings automatically enter the groove, which is a key breakthrough in the hydrostatic testing of traditional spiral welded pipes. Summary of the Invention

[0009] To address the shortcomings of the existing technology, the present invention aims to provide an automatic sealing ring device for a large-diameter spiral welded pipe hydraulic press, which solves the technical problem of using a grooved end seal, automatically sealing the pipe end with sealing rings of different diameters without changing the test head, automatically inserting the sealing ring into the groove, and performing one-button automatic pressure testing.

[0010] The objective of this invention is achieved by providing an automatic sealing ring fitting device for a large-diameter spiral welded pipe hydraulic press, comprising a frame.

[0011] The sealing base is located between the side seal of the hydraulic press and the end of the spiral welded pipe, and is used to support and fix the sealing ring.

[0012] The axis is determined to calculate and determine the height H of the spiral welded pipe's center axis OO relative to the hydraulic press foundation, based on the diameter of the spiral welded pipe to be tested for hydrostatic pressure. O ;

[0013] The centering drive is used to move the sealing ring so that the center of the sealing ring is aligned with the central axis of the spiral welded pipe;

[0014] The control unit is used to control the centering drive to position the center of the sealing ring onto the central axis of the spiral welded pipe based on the determined axis.

[0015] Furthermore, the sealing base is provided with a mandrel perpendicular to the plane of the sealing base, and multiple circular grooves of different diameters are concentrically arranged with the mandrel as the center. A sealing ring is embedded in the circular groove; the mandrel and the central axis of the spiral welded pipe are located in the same vertical plane.

[0016] Furthermore, the centering drive includes a guide column and a side drive. The side drive can drive the sealing platform to move up and down along the guide column, thereby moving the sealing platform up and down to align the center of the sealing ring with the centerline of the spiral welded pipe.

[0017] Furthermore, the control unit includes a laser emitter, a laser receiver, and a notifier. The laser emitter is located at the center of the spindle, and the laser receiver is vertically slidably mounted on the side seal of the hydraulic press. The axis is determined to determine the height position H0 by: the control unit determining the height position H0 of the spiral welded pipe's central axis relative to the hydraulic press foundation. O Move the laser receiver to that height position H O .

[0018] Furthermore, the control of the centering drive to position the center of the sealing ring on the central axis of the spiral welded pipe is achieved as follows: the control unit controls the centering drive to drive the sealing support to receive the laser emitted by the mandrel, the notifier sends a centering signal, and the centering drive stops at the same time.

[0019] Furthermore, the sealing platform is provided with a mandrel and a fixed-point locking pin. The mandrel and the central axis of the spiral welded pipe are located in the same vertical plane. The fixed-point locking pin (15) is used as the lowest support point for the sealing ring to be positioned.

[0020] Furthermore, the frame is equipped with a pivot, and the sealing platform also includes a lifting cylinder, which is connected between the frame and the sealing platform. The lifting cylinder drives the sealing platform to switch between a horizontal and a vertical state around the pivot.

[0021] Furthermore, at least five concentric drives are arranged at intervals on the sealing bearing in a vertical plane passing through the central axis of the spiral welded pipe. One concentric drive is slidably arranged on a vertical line passing through the fixed-point locking pin, and the other four pin mechanisms are symmetrically arranged on both sides of the vertical line.

[0022] Furthermore, the center drive includes a drive screw, a nut, a pin seat and two guide grooves located on the sealed base. The guide grooves are located on both sides of the pin seat, the pin seat is slidably located in the guide grooves, the nut is fixedly connected to the pin seat, the drive screw is fitted in the nut (52), and one end of the drive screw is connected to the drive motor.

[0023] Furthermore, the control unit completes the positioning action as follows: the axis is determined based on the diameter of the spiral welded pipe to determine the center position of the sealing ring; the stop position Pi (i = 1 to 5) of the nut on the drive screw of each centering drive is calculated based on the center position; each centering drive is started, the drive screw rotates and drives the nut to the corresponding stop position Pi (i = 1 to 5), together forcing the center position of the sealing ring to be positioned to the center position determined by the axis.

[0024] An automatic sealing ring fitting device for a large-diameter spiral welded pipe hydraulic pressure tester, through axis determination 20 and matching drive 30 and 50, achieves coaxial positioning of the center of the sealing ring with the central axis of the spiral welded pipe. Sealing rings weighing 50 kg or more are automatically positioned directly opposite the end of the spiral welded pipe. The end of the welded pipe can be abutted into the sealing groove of the sealing ring simply by moving the side sealing platform of the hydraulic pressure tester, reducing at least one operator and lowering the labor intensity of the hydraulic pressure test. Attached Figure Description

[0025] Figure 1 is a front view of an embodiment 1 of the automatic sealing ring fitting device for a large-diameter spiral welded pipe hydraulic press according to the present invention;

[0026] Figure 2 is a schematic diagram of the centering drive of an embodiment 1 of the automatic sealing ring fitting device for a large-diameter spiral welded pipe hydraulic press of the present invention.

[0027] Figure 3 is a cross-sectional view AA of Figure 1 of an embodiment 1 of the automatic sealing ring fitting device for a large-diameter spiral welded pipe hydraulic press of the present invention.

[0028] Figure 4 is a frame diagram of the axis determination of an embodiment 1 of the automatic sealing ring device for a large-diameter spiral welded pipe hydraulic press of the present invention;

[0029] Figure 5 is a front view of Embodiment 2 of the automatic sealing ring device for a large-diameter spiral welded pipe hydraulic press according to the present invention.

[0030] Figure 6 is a left view of Embodiment 2 of the automatic sealing ring device for a large-diameter spiral welded pipe hydraulic press according to the present invention.

[0031] Figure 7 is a schematic diagram of the principle of Embodiment 2 of the automatic sealing ring device for a large-diameter spiral welded pipe hydraulic press of the present invention.

[0032] The reference numerals in the above figure:

[0033] 1 side sealing platform

[0034] 10 Sealing base, 11 Mandrel, 12 Sealing ring, 13 Circular groove, 14 Pivot, 15 Lifting cylinder, 16 Fixed-point retaining pin

[0035] 20. Axis Determination, 21. Input Device, 22. Determiner

[0036] 30. Center drive; 31. Guide post; 32. Side drive; 33. Side drive screw; 34. Side drive nut; 35. Worm gear pair.

[0037] 40 Control unit, 41 Laser emitter, 42 Laser receiver, 43 Notifier

[0038] 50. Alignment drive, 51. Alignment screw, 52. Alignment nut, 53. Pin seat, 54. Guide groove, 55. Alignment motor, 56. Telescopic latch, 57. Telescopic cylinder. Detailed Implementation

[0039] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but are not intended to limit the scope of the present invention.

[0040] Example 1

[0041] An automatic sealing ring fitting device for a large-diameter spiral welded pipe hydraulic press, comprising:

[0042] The sealing base 10 is fixed on the side seal of the hydraulic press. The sealing base 10 is provided with a mandrel 11, and multiple circular grooves 13 of different diameters are concentrically provided with the mandrel 11 as the center. A sealing ring 12 is embedded in the circular groove 13. The cross-section of the circular groove 13 is suitable for fixing the sealing ring 12. The sealing base 10 is located in a vertical plane passing through the axis of the spiral welded pipe with the mandrel 11 and can move up and down.

[0043] Axis Determination 20: Axis Determination 20 is used to calculate and determine the height H of the spiral welded pipe's center axis OO relative to the hydraulic press foundation, based on the spiral welded pipe to be tested for hydraulic pressure. O ;

[0044] The centering drive 30 includes a guide post 31 and a side drive 32. The side drive 32 can drive the sealing platform 10 to move up and down along the guide post 31, so as to move the sealing platform 10 up and down to align the center of the sealing ring 12 with the centerline axis of the spiral welded pipe.

[0045] Based on the result of axis determination 20, the control unit 40 controls the drive 32 to center the center of the sealing base 10 onto the axis of the spiral welded pipe.

[0046] The axis determination 20 includes an input device 21 and a determiner 22. The determiner 22 is used to calculate the height H of the spiral welded pipe's central axis OO relative to the hydraulic press foundation based on the diameter of the spiral welded pipe to be tested, which is input by the input device 21. O .

[0047] The control unit 40 includes a laser emitter 41, a laser receiver 42, and a notifier 43. The laser emitter 41 is located at the center of the spindle 11, and the laser receiver 42 is vertically slidably mounted on the side seal of the hydraulic press. During the setup phase, the control unit 40 adjusts the position of the spiral welded pipe's central axis relative to the height H of the hydraulic press foundation. O Move the laser receiver 42 to that height position H. O The axis is determined, and the height position H is determined. O The implementation is as follows: the control unit 40 controls the centering drive 30 to drive the sealed bearing 10 to emit laser 41 from the spindle 11 and receive laser 42.

[0048] The control centering drive positions the center of the sealing ring 12 onto the central axis of the spiral welded pipe as follows: the control unit 40 controls the centering drive 30 to drive the sealing support 10 to center the laser emission 41 of the spindle 11 to the laser receiver 42, the notifier 43 sends a centering signal, and the centering drive 30 stops at the same time.

[0049] The side drive 32 includes a side drive screw 33 and a side drive nut 34, with the side drive nut 34 coupled to a worm gear pair 35. The side drive screw 33 is fixedly connected to the sealing support 10, and the guide post 31 is mounted on the frame. The side drive nut 34 drives the side drive screw 33 and the sealing support 10 to move up and down along the guide post 31 to adjust the center height position H1 of the sealing ring 12.

[0050] Action Description: Multiple sealing rings 12 of different diameters are pre-embedded in the circular groove 13. The spiral welded pipe is suspended on the support roller. The axis determination 20 determines the height position H of the central axis according to the input diameter of the spiral welded pipe w. O The control unit 40 activates the side drive 32, which moves the sealing platform 10 up and down to position the center of the circular groove 13 concentric with the central axis of the spiral welded pipe. The side sealing platform of the hydraulic press is moved, and the side sealing platform moves the sealing platform 10 to place a sealing ring of the same diameter onto the end of the spiral welded pipe. The same action is performed on the other end, and the preparation work for the hydraulic pressure test of the spiral welded pipe is completed.

[0051] The disadvantage is that the diameter of the sealing ring is fixed to a few specific sizes, and sealing rings of other diameters require additional sealing bases. Large-diameter spiral welded pipes, meaning spiral welded pipes with a diameter greater than or equal to 800mm, preferably 820mm-4020mm.

[0052] Example 2

[0053] The concentric embedding is modified to be aligned and snapped together with the moving pin at multiple points; the other structures are the same as in Example 1.

[0054] An automatic sealing ring fitting device for a large-diameter spiral welded pipe hydraulic press, comprising:

[0055] The sealing base 10 can switch between a horizontal and a vertical state around a pivot 14 to support and fix the sealing ring 12. The sealing base 10 is provided with a spindle 11 and a fixed-point locking pin 16, which is used for the lowest support point of the sealing ring 12. When the sealing base 10 is in the vertical state, the fixed-point locking pin 16 is half the thickness of the sealing ring at the lowest point of the spiral welded pipe, so that the spiral welded pipe can directly abut against the sealing position of the sealing ring 12 at that point.

[0056] Axis Determination 20: Axis Determination 20 is used to calculate and determine the height H of the spiral welded pipe's center axis OO relative to the hydraulic press foundation, based on the spiral welded pipe to be tested for hydraulic pressure. O ;

[0057] Multiple centering drives 50 are slidably disposed on the sealing support 10 in multiple directions to drive the sealing ring 12 so as to align the center of the sealing ring 12 with the centerline axis of the spiral welded pipe.

[0058] The control unit 40 is used to drive the pin mechanism 30 to move relative to the fixed-point locking pin 20 according to the result of the axis determination 20, so as to position the center of the sealing ring 12 to the center axis of the aligning spiral welded pipe and lock the sealing ring 12 onto the surface of the sealing support 10 to complete the positioning action.

[0059] The sealing platform 10 also includes a lifting cylinder 15 and a frame. A pivot 14 is located on the frame. The lifting cylinder 15 is connected between the frame and the sealing platform 10. When the lifting cylinder 15 extends, the sealing platform 10 switches from a vertical state to a horizontal state. When the lifting cylinder 15 retracts, the sealing platform 10 switches from a horizontal state to a vertical state.

[0060] The centering drive 50 includes a centering screw 51, a centering nut 52, a pin seat 53, and two guide grooves 54, all located on the sealing base 10. The guide grooves 54 are located on both sides of the pin seat, and the pin seat 53 is slidably disposed within the guide grooves 54. The nut 52 is fixedly connected to the pin seat 53, and the centering screw 51 is fitted into the centering nut 52. One end of the centering screw 51 is connected to a centering motor 55. The pin seat 53 has telescopic locking pins 56 symmetrically arranged on both sides of the centering screw 51. A telescopic cylinder 57 is fixedly mounted on the pin seat 53, and the piston of the telescopic cylinder 57 connects to the telescopic locking pins 56. The extension height of the telescopic locking pins 56 is higher than the height of the sealing ring 12. The frame is equipped with wheels.

[0061] At least five concentric drives 50 are symmetrically arranged on the sealing base 10, spaced apart in a vertical plane passing through the central axis of the spiral welded pipe. Specifically, one pair of concentric drives 50 is slidably arranged on the same vertical line as the fixed-point locking pin 20, and the other four pin mechanisms 30 are symmetrically arranged on both sides of the vertical line. More preferably, on one side of the vertical line, the included angle between multiple adjacent pin mechanisms 30 increases by 15 degrees successively. For example, the included angle between the fixed locking pin 20 and the first side pin mechanism 30 is 45 degrees, the included angle between the first and second pin mechanisms 30 is 60 degrees, and the included angle between the second and third pin mechanisms 30 is 75 degrees.

[0062] The positioning action of the control unit 40 is as follows: the axis determination 20 determines the center position of the sealing ring according to the diameter of the spiral welded pipe; the stop position Pi (i = 1-5) of the nut 52 on the centering screw 51 of each centering drive 50 is calculated according to the center position; each centering drive 50 is started, and the centering screw 51 rotates to drive the nut 52 to the corresponding stop position Pi (i = 1-5), which together force the center position of the sealing ring 12 to be positioned to the center position determined by the axis determination 20.

[0063] Action Description: The push cylinder extends, and the sealing platform 10 switches from a vertical to a horizontal position. The operator places the sealing ring of the corresponding diameter on the sealing platform 10. The sealing ring 12 is located within the multiple pin mechanisms 30. Please note that a single large-diameter sealing ring 12 weighs approximately 50-80 kg, and manual placement is quite heavy and laborious. Axis Determination 20: Determine the height position H of the center axis based on the input diameter of the spiral welded pipe w. O The control unit 40 drives multiple centering mechanisms 50 to move relative to the fixed-point locking pin 20, positioning the center of the sealing ring 12 to the central axis of the aligning spiral welded pipe. The push cylinder retracts, and the sealing platform 10 switches from a horizontal to a vertical state. The automatic sealing ring fitting device is moved to the end of the spiral welded pipe, causing the sealing platform 10 to fit a sealing ring of the same diameter onto the end of the spiral welded pipe. The telescopic cylinder 57 drives the telescopic locking pin 56 to retract, completing the sealing ring fitting action. The automatic sealing ring fitting device is moved to the other end of the spiral welded pipe, and the above actions are performed on the other end as well. Once both ends are fitted, the spiral welded pipe awaits the hydrostatic test.

[0064] In Embodiment 2, the sealing ring 12 is placed flat on the surface of the sealing base 10. After the positioning action is completed, it is switched to a vertical position, overcoming the shortcomings of Embodiment 1. Sealing rings of any diameter can be positioned on the sealing base 10, expanding the applicability of the sealing base. At the same time, this sealing ring device can be separately fitted outside the hydraulic pressure testing machine, eliminating the problem of matching the sealing base with the hydraulic pressure machine's sealing platform.

[0065] An automatic sealing ring fitting device for a large-diameter spiral welded pipe hydraulic pressure tester, through axis determination 20 and matching drive 30 and 50, achieves coaxial positioning of the center of the sealing ring with the central axis of the spiral welded pipe. Sealing rings weighing 50 kg or more are automatically positioned at the end of the spiral welded pipe. The end of the welded pipe can be abutted into the sealing groove of the sealing ring simply by moving the side sealing platform of the hydraulic pressure tester, reducing at least one operator and lowering the labor intensity of the hydraulic pressure test.

Claims

1. An automatic sealing ring fitting device for a large-diameter spiral welded pipe hydraulic press, comprising a frame, characterized in that, A sealing base (10) is provided between the side seal of the hydraulic press and the end of the spiral welded pipe, and is used to support and fix the sealing ring (12). The sealing base (10) is provided with a mandrel (11) and a fixed-point pin (16). The mandrel (11) and the central axis of the spiral welded pipe are located in the same vertical plane. The fixed-point pin (16) is used as the lowest support point for the sealing ring (12) after positioning. The axis determination (20) is used to determine the height position H of the central axis OO of the spiral welded pipe relative to the hydraulic press foundation based on the diameter of the spiral welded pipe to be tested by hydraulic pressure. O At least five centering drives (50) are spaced apart on the sealing base (10) in a vertical plane passing through the central axis of the spiral welded pipe. One centering drive (50) is slidably positioned on a vertical line passing through the fixed-point pin (16), and the other four centering drives (50) are symmetrically positioned on both sides of the vertical line to drive the sealing ring (12) to align the center of the sealing ring (12) with the central axis of the spiral welded pipe. The control unit (40) is used to control the centering drives to position the center of the sealing ring (12) on the central axis of the spiral welded pipe according to the result of the axis determination (20) to complete the positioning action.

2. The automatic sealing ring fitting device for a large-diameter spiral welded pipe hydraulic press as described in claim 1, characterized in that, The centering drive (50) includes a drive screw (51) and a nut (52). The drive screw (51) is fitted into the nut (52). One end of the drive screw (51) is connected to a drive motor (55). Multiple centering drives (50) can move relative to the fixed pin (16).

3. The automatic sealing ring fitting device for a large-diameter spiral welded pipe hydraulic press as described in claim 2, characterized in that, The centering drive (50) also includes a pin mechanism, which includes a pin seat (53), the pin seat (53) is slidably disposed in the guide groove (54), the nut (52) is fixedly connected to the pin seat (53), the pin seat (53) is provided with telescopic pins (56) symmetrically on both sides of the centering screw (51), the pin seat (53) is fixedly provided with a telescopic cylinder (57), the piston of the telescopic cylinder (57) is connected to the telescopic pins (56), and the sealing ring (12) is engaged between the multiple telescopic pins (56).

4. The automatic sealing ring fitting device for a large-diameter spiral welded pipe hydraulic press as described in claim 3, characterized in that, The center drive (50) also includes two guide grooves (54), which are located on both sides of the pin seat, and the pin seat (53) is slidably located in the guide grooves (54).

5. An automatic sealing ring fitting device for a large-diameter spiral welded pipe hydraulic press as described in claim 4, characterized in that, The included angle between multiple adjacent center drives (50) increases by 15 degrees in succession.

6. The automatic sealing ring fitting device for a large-diameter spiral welded pipe hydraulic press as described in claim 2, characterized in that, The frame is provided with a pivot (14), and the sealing platform (10) also includes a push cylinder (15). The push cylinder (15) is connected between the frame and the sealing platform (10). The push cylinder (15) drives the sealing platform (10) to switch between a horizontal and a vertical state around the pivot (14).

7. The automatic sealing ring fitting device for a large-diameter spiral welded pipe hydraulic press as described in claim 6, characterized in that, When the sealing base (10) is in a horizontal state, the operator places the sealing ring of the corresponding diameter on the sealing base (10), and the sealing ring (12) is located in multiple pin mechanisms; after the positioning action is completed, the sealing base (10) switches from a horizontal state to a vertical state.

8. The automatic sealing ring fitting device for a large-diameter spiral welded pipe hydraulic press as described in claim 7, characterized in that, The control unit (40) includes a laser emitter (41), a laser receiver (42), and a notifier (43). The laser emitter (41) is located at the center of the spindle (11), and the laser receiver (42) is vertically slidably located on the side seal of the hydraulic press. The axis determination (20) determines the height position H0 by: the control unit (40) determining the height position H0 of the spiral welded pipe center axis relative to the hydraulic press foundation. O Move the laser receiver (42) to the height position H. O .

9. The automatic sealing ring fitting device for a large-diameter spiral welded pipe hydraulic press as described in claim 8, characterized in that, The control centering drive positions the center of the sealing ring (12) on the central axis of the spiral welded pipe as follows: the control unit (40) controls the centering drive (50) to drive the sealing support (10) to align the laser emission (41) of the mandrel (11) with the laser receiver (42), the notifier (43) sends out the centering signal, and the centering drive (50) stops at the same time.

10. The automatic sealing ring fitting device for a large-diameter spiral welded pipe hydraulic press as described in any one of claims 1-9, characterized in that, The control unit (40) completes the positioning action as follows: axis determination (20) determines the center position of the sealing ring according to the diameter of the spiral welded pipe; and calculates the stop position P of the nut (52) on the drive screw (51) of each center-driven (50) according to the center position. i i=1~5, start each center drive (50), drive screw (51) to rotate and drive nut (52) to the corresponding stop position P. i Together, they force the center of the sealing ring (12) to be positioned at the center position determined by the axis (20).

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