Welded pipe flattening test equipment

Abstract

A welded pipe flattening test device comprises an extrusion table, a press, a local extrusion module, an overall extrusion module and a rotating device, the press is arranged on the extrusion table, the overall extrusion module is arranged on the local extrusion module, the local extrusion module is connected with the press through the rotating device, and the overall extrusion module is connected with the press through the rotating device. The rotating device is used for controlling the local extrusion module and the overall extrusion module to rotate so as to switch different extrusion modules to perform extrusion test on the welded pipe on the extrusion table; the local extrusion module comprises a mounting bin, a first motor, a lead screw driving part and a local extrusion plate, the first motor is arranged in the mounting bin, the lead screw driving part is arranged at the driving end of the first motor, and the local extrusion plate is arranged on the lead screw driving part. Therefore, the overall flattening test and the local flattening test can be performed on the welded pipe, so that accurate welded pipe quality data can be obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe fitting production, in particular to a welded pipe flattening test device. Background Art

[0002] The welded pipe flattening test is a method used to evaluate the quality of welded steel pipes, especially to examine the quality of the weld and the deformation capacity of the pipe body when subjected to external forces.

[0003] Conventional technology often uses a press to drive an upper platen to apply pressure to the welded pipe on a lower platen until the desired flattening degree is achieved. Existing flattening testing equipment can only flatten an entire section of welded pipe, thereby comprehensively evaluating the entire section's compressive strength, material uniformity, and weld quality.

[0004] Since it is impossible to focus on a specific area (such as the weld area) during flattening, the specific performance and potential defects of the weld (such as incomplete penetration, cracks, etc.) may not be accurately revealed. In addition, some parts may have local material defects or processing problems (such as uneven wall thickness, internal inclusions, etc.). These problems may be masked during overall flattening, resulting in inaccurate quality inspection of welded pipes. Summary of the Invention

[0005] The present invention aims to solve one of the technical problems in the above-mentioned technology at least to a certain extent.

[0006] To this end, the purpose of the present invention is to provide a welded pipe flattening test device that can perform overall flattening tests and local flattening tests on welded pipes to obtain accurate welded pipe quality data.

[0007] To achieve the above-mentioned purpose, the present invention proposes a welded pipe flattening test equipment, comprising: an extrusion table, a press, a local extrusion module, an overall extrusion module and a rotating device, wherein the press is arranged on the extrusion table, the overall extrusion module is arranged on the local extrusion module, the local extrusion module is connected to the press through the rotating device, and the rotating device is used to control the rotation of the local extrusion module and the overall extrusion module to switch different extrusion modules to perform extrusion tests on the welded pipe on the extrusion table; the local extrusion module comprises: an installation bin, a first motor, a screw drive and a local extrusion plate, wherein the first motor is arranged in the installation bin, the screw drive is arranged on the driving end of the first motor, and the local extrusion plate is arranged on the screw drive.

[0008] In one embodiment of the present invention, the integral extrusion module and the local extrusion plate are both plate bodies, and the area size of the contact surface between the integral extrusion module and the welded pipe is larger than the area size of the contact surface between the local extrusion plate and the welded pipe.

[0009] In one embodiment of the present invention, the local extrusion module is provided with a plurality of screw drives and local extrusion plates, one of the plurality of screw drives is connected to the first motor, and two adjacent screw drives are connected via a transmission.

[0010] In one embodiment of the present invention, a first electric push rod is provided on the screw drive member, and an electromagnet is provided on the driving end of the first electric push rod. The electromagnet is magnetically connected to the local extrusion plate, and the local extrusion plate is connected to the installation bin through a plurality of limit members.

[0011] In one embodiment of the present invention, the limiting member includes: a first hydraulic telescopic device and a back plate, a plurality of slots are provided on the local extrusion plate, and the plurality of slots correspond one-to-one to the plurality of limiting members, the first hydraulic telescopic device is arranged on the mounting bin, the back plate is arranged at the driving end of the first hydraulic telescopic device, and the back plate is slidably connected to the slots.

[0012] In one embodiment of the present invention, the rotating device includes: a moving block, a second motor, a bevel gear set and a rotating shaft, wherein the moving block is arranged on the press, a mounting groove is opened in the moving block, the rotating shaft is rotatably arranged in the mounting groove through a bearing seat, the second motor is connected to the rotating shaft through the bevel gear set, wherein the rotating shaft is connected to the local extrusion module.

[0013] In one embodiment of the present invention, the extrusion table includes: a base, a workbench, a third motor, a driving wheel, a support rod, a driven wheel and a transmission chain, wherein the third motor is arranged on the base, the driving wheel is arranged on the driving end of the third motor, the support rod is rotatably arranged on the base, the driven wheel is arranged on the support rod, the driving wheel is connected to the driven wheel through the transmission chain, and the workbench is arranged at the top end of the support rod.

[0014] In one embodiment of the present invention, an annular groove is provided on the workbench, a plurality of second electric push rods are arranged in the annular groove, a protective cover is slidably connected in the annular groove, the protective cover is connected to the driving end of the second electric push rod, and the local extrusion module and the overall extrusion module are respectively slidably connected to the protective cover.

[0015] Beneficial effects of the present invention: The rotating device can quickly switch the extrusion mode according to test requirements to improve test efficiency. In the overall extrusion mode, the overall extrusion module and the extrusion table cooperate to extrude the target welded pipe as a whole. In the localized extrusion mode, the screw drive can drive the corresponding localized extrusion plate to move directly above the target area of the welded pipe. The localized extrusion module and the extrusion table cooperate to extrude a specific area of the target welded pipe.

[0016] When welded pipes need to face complex external pressures, the two extrusion modes can better simulate the stress conditions of the welded pipes in actual use, so as to obtain more accurate welded pipe quality inspection reports.

[0017] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which: Figure 1 Schematic diagram of the overall structure of a welded pipe flattening test device according to one embodiment of the present invention; Figure 2 is a schematic cross-sectional view of a welded pipe flattening test device according to one embodiment of the present invention; Figure 3 is a schematic cross-sectional structural diagram of a local extrusion module and an overall extrusion module according to one embodiment of the present invention; Figure 4 Schematic diagram of the connection structure between the lead screw drive and the electromagnet according to one embodiment of the present invention; Figure 5 Schematic diagram of the connection structure between the abutment plate and the local extrusion plate according to one embodiment of the present invention; Figure 6 is a schematic cross-sectional view of a rotating device according to one embodiment of the present invention; Figure 7 Schematic diagram of the connection structure between the second electric push rod and the protective cover according to one embodiment of the present invention; Figure 8 is a schematic cross-sectional structural diagram of an extrusion platform and a protective cover according to one embodiment of the present invention; Figure 9 Schematic diagram of the cross-sectional structure of an extrusion station according to one embodiment of the present invention.

[0019] As shown in the figure: 1. Extrusion table, 101. Base, 102. Workbench, 103. Third motor, 104. Driving wheel, 105. Support rod, 106. Driven wheel, 107. Transmission chain, 108. Placement slot, 2. Press, 21. Main chamber, 22. Hydraulic press, 23. First telescopic rubber, 24. Second telescopic rubber, 3. Local extrusion module, 31. Installation chamber, 32. First motor, 33. Screw drive, 331 , ball screw, 332, ball slider, 34, local extrusion plate, 4, overall extrusion module, 5, rotating device, 51, moving block, 52, second motor, 53, bevel gear set, 54, rotating shaft, 55, mounting groove, 6, transmission, 7, first electric push rod, 8, electromagnet, 9, limiter, 91, first hydraulic telescopic device, 92, stop plate, 10, slot, 11, ring groove, 12, second electric push rod, 13, protective cover. DETAILED DESCRIPTION

[0020] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0021] A welded pipe flattening test apparatus according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0022] like Figure 1 and Figure 3 As shown, the welded pipe flattening test equipment according to an embodiment of the present invention may include: an extrusion platform 1 , a press 2 , a local extrusion module 3 , an overall extrusion module 4 and a rotating device 5 .

[0023] The press 2 is set on the extrusion table 1, the overall extrusion module 4 is set on the local extrusion module 3, the local extrusion module 3 is connected to the press 2 through a rotating device 5, and the rotating device 5 is used to control the rotation of the local extrusion module 3 and the overall extrusion module 4 to switch different extrusion modules to perform extrusion testing on the welded pipe on the extrusion table 1.

[0024] It is understandable that the rotating device 5 described in this embodiment can quickly switch the extrusion mode according to the test requirements to improve the test efficiency. There is no need to change the test equipment when facing different test items.

[0025] The local extrusion module 3 may include: an installation chamber 31, a first motor 32, a screw driver 33, and a local extrusion plate 34. The first motor 32 is disposed in the installation chamber 31, the screw driver 33 is disposed on the driving end of the first motor 32, and the local extrusion plate 34 is disposed on the screw driver 33. Both the overall extrusion module 4 and the local extrusion plate 34 are plate bodies, and the area of the contact surface between the overall extrusion module 4 and the welded pipe is larger than the area of the contact surface between the local extrusion plate 34 and the welded pipe.

[0026] The first motor 32 can provide driving force for the screw driver 33 to adjust the working position of the local extrusion plate 34 so that the local extrusion plate 34 can locally extrude the target area on the weld pipe.

[0027] In one embodiment of the present invention, Figure 3 As shown, there are multiple screw driving members 33 and local extrusion plates 34 in the local extrusion module 3, one of the multiple screw driving members 33 is connected to the first motor 32, and two adjacent screw driving members 33 are connected through the transmission 6.

[0028] It can be understood that the first motor 32 described in this embodiment can provide driving force for the multiple screw drive members 33, and at the same time drive the multiple local extrusion plates 34 to move horizontally on the mounting bin 31, and the electronically controlled transmission 6 (gearbox) can adjust the spacing between the multiple local extrusion plates 34 by controlling the moving speed of the local extrusion plates 34 by the screw drive members 33.

[0029] Furthermore, the screw drive 33 may include: a ball screw 331 and a ball slider 332, the ball slider 332 is arranged on the ball screw 331, the ball slider 332 can move on the rotating ball screw 331, multiple ball screws 331 and multiple transmissions 6 correspond one to one, and multiple ball screws 331 are connected through the transmission 6 so that the first motor 32 can simultaneously drive multiple ball screws 331 to rotate.

[0030] Specifically, relevant personnel cut a section of the target welded pipe from the welded pipe and place the target welded pipe on the extrusion table 1. The press 2 drives the overall extrusion module 4 to move toward the extrusion table 1 through the rotating device 5. The cooperation between the overall extrusion module 4 and the extrusion table 1 can extrude the target welded pipe as a whole.

[0031] When it is necessary to perform local extrusion on certain specific areas of the target weld pipe, the rotating device 5 can switch the type of extrusion module by rotating the local extrusion module 3, so that the local extrusion module 3 faces the target weld pipe, and the first motor 32 drives multiple ball screws 331 to rotate at the same time. The transmission 6 can adjust the rotation speed of the corresponding ball screw 331 so that the ball slider 332 moves the corresponding local extrusion plate 34 to be directly above the target area of the weld pipe. The cooperation of the local extrusion module 3 and the extrusion platform 1 can perform local extrusion on multiple areas of the target weld pipe.

[0032] In one embodiment of the present invention, Figure 3-Figure 5 As shown, a first electric push rod 7 is provided on the screw drive 33, and an electromagnet 8 is provided on the driving end of the first electric push rod 7. The electromagnet 8 is magnetically connected to the local extrusion plate 34, and the local extrusion plate 34 is connected to the installation chamber 31 through multiple limit members 9.

[0033] The limiting member 9 includes: a first hydraulic telescopic device 91 and a support plate 92. A plurality of card slots 10 are provided on the local extrusion plate 34. The plurality of card slots 10 correspond one-to-one to the plurality of limiting members 9. The first hydraulic telescopic device 91 is arranged on the installation bin 31. The support plate 92 is arranged at the driving end of the first hydraulic telescopic device 91. The support plate 92 is slidably connected to the card slots 10.

[0034] Specifically, when the local extrusion plate 34 extrudes the target weld pipe, it exerts a reaction force on the screw drive 33, which will seriously affect the service life of the screw drive 33 under long-term use. The screw drive 33 drives the local extrusion plate 34 to move horizontally on the abutment plate 92 through the electromagnet 8 on the first electric push rod 7. The abutment plate 92 provides support for the horizontal movement of the local extrusion plate 34, reducing the load-bearing capacity of the screw drive 33. After the local extrusion plate 34 moves to the target position, the first electric push rod 7 controls the electromagnet 8 to separate from the local extrusion plate 34, the driving end of the first hydraulic telescopic device 91 retracts, and the abutment plate 92 pushes the local extrusion plate 34 to abut against the installation chamber 31, completing the adjustment of the position of the local extrusion plate 34. Except for the position adjustment process, the screw drive 33 is not subject to excess external force, which greatly improves the service life of the screw drive 33.

[0035] In one embodiment of the present invention, Figure 2 and Figure 6As shown, the rotating device 5 may include: a moving block 51, a second motor 52, a bevel gear set 53 and a rotating shaft 54, wherein the moving block 51 is arranged on the press 2, a mounting slot 55 is provided in the moving block 51, the rotating shaft 54 is rotatably arranged in the mounting slot 55 through a bearing seat, and the second motor 52 is connected to the rotating shaft 54 through the bevel gear set 53, wherein the rotating shaft 54 is connected to the local extrusion module 3. It should be noted that the bevel gear set 53 is composed of two mutually meshing bevel gear sets 53, one bevel gear is arranged on the driving end of the second motor 52, and the other bevel gear is arranged on the rotating shaft 54. The second motor 52 drives the rotating shaft 54 to rotate through the bevel gear set 53, and drives the local extrusion module 3 to rotate through the rotating shaft 54. In one embodiment of the present invention, Figure 7-Figure 9 As shown, the extrusion table 1 may include: a base 101, a workbench 102, a third motor 103, a driving wheel 104, a support rod 105, a driven wheel 106, and a transmission chain 107. The third motor 103 is disposed on the base 101, the driving wheel 104 is disposed on the driving end of the third motor 103, the support rod 105 is rotatably disposed on the base 101, the driven wheel 106 is disposed on the support rod 105, the driving wheel 104 is connected to the driven wheel 106 via a transmission chain 107, and the workbench 102 is disposed at the top of the support rod 105. A placement groove 108 (e.g., a V-shaped placement groove 108, an arc-shaped placement groove 108, etc.) is defined on the workbench 102 for placing the target welded pipe.

[0036] It is understandable that the third motor 103 provides driving force to the driving wheel 104 , and the driving wheel 104 drives the driven wheel 106 to rotate through the transmission chain 107 , so that the support rod 105 drives the workbench 102 to rotate on the base 101 .

[0037] An annular groove 11 is provided on the workbench 102, and a plurality of second electric push rods 12 are arranged in the annular groove 11. A protective cover 13 is slidably connected in the annular groove 11, and the protective cover 13 is connected to the driving end of the second electric push rod 12. The local extrusion module 3 and the overall extrusion module 4 are respectively slidably connected to the protective cover 13.

[0038] It should be noted that when there are defects inside the steel pipe (for example, tertiary cementite, etc.), these defects will become stress concentration points. In the flattening test, the application of external force will cause local stress to be much higher than the yield strength of the material, thereby causing brittle fracture or sudden cracking. The broken metal fragments will splash at a high speed. Similarly, if the weld quality is poor (such as cold welds, slag inclusions), the weld will easily become the starting point of fracture during flattening. When the fracture occurs, the material near the weld may suddenly collapse due to local stress concentration, which will also cause fragments to fly. Therefore, the second electric push rod 12 can drive the protective cover 13 to move vertically to adapt to target welded pipes of different sizes, and the press 2 can drive the local extrusion module 3 and the overall extrusion module 4 to move vertically within the cover of the protective cover 13.

[0039] Furthermore, the press 2 includes: a main body bin 21, a hydraulic press 22, a first telescopic rubber 23, and a second telescopic rubber 24. The hydraulic press 22 is disposed within the main body bin 21, and a moving block 51 is disposed on the driving end of the hydraulic press 22. The moving block 51 is connected to the upper inner wall of the main body bin 21 via the first telescopic rubber 23, and the moving block 51 is connected to the lower inner wall of the main body bin 21 via the second telescopic rubber 24. The moving block 51, the first telescopic rubber 23, and the second telescopic rubber 24 can cover the opening of the main body bin 21 to prevent other debris from entering the main body bin 21. The press 2 and the rotating device 5 can be symmetrically provided with two.

[0040] It should be noted that the motors described in the above embodiments (for example, the first motor 32, the second motor 52, the third motor 103, etc.) are equipped with brakes, which can quickly stop the motors from running. A reduction gearbox is provided on the driving end of the motor, and the driving end of the motor is connected to the input end of the reduction gearbox. The output end of the reduction gearbox constitutes the driving end of the motor, and the speed of the motor output is adjusted by the reduction gearbox.

[0041] In summary, the welded pipe flattening test equipment according to the embodiment of the present invention can perform overall flattening tests and local flattening tests on welded pipes to obtain accurate welded pipe quality data.

[0042] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0043] In the description of this specification, reference to terms such as "one embodiment," "some embodiments," and "example" means that a particular feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In addition, those skilled in the art may combine and integrate different embodiments or examples described in this specification, as well as features of different embodiments or examples, unless otherwise inconsistent.

[0044] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A welded pipe flattening test equipment, characterized in that: include: An extrusion table (1), a press (2), a local extrusion module (3), an overall extrusion module (4) and a rotating device (5), wherein: The press (2) is arranged on the extrusion table (1), the overall extrusion module (4) is arranged on the local extrusion module (3), the local extrusion module (3) is connected to the press (2) via the rotating device (5), and the rotating device (5) is used to control the rotation of the local extrusion module (3) and the overall extrusion module (4) to switch different extrusion modules to perform extrusion testing on the welded pipe on the extrusion table (1); The local extrusion module (3) comprises: a mounting chamber (31), a first motor (32), a screw driver (33) and a local extrusion plate (34), wherein the first motor (32) is arranged in the mounting chamber (31), the screw driver (33) is arranged on the driving end of the first motor (32), and the local extrusion plate (34) is arranged on the screw driver (33).

2. The welded pipe flattening test equipment according to claim 1, characterized in that: The integral extrusion module (4) and the local extrusion plate (34) are both plate bodies, and the area size of the contact surface between the integral extrusion module (4) and the welded pipe is larger than the area size of the contact surface between the local extrusion plate (34) and the welded pipe.

3. The welded pipe flattening test equipment according to claim 1, characterized in that: The local extrusion module (3) is provided with a plurality of the screw drive members (33) and the local extrusion plate (34), one of the plurality of screw drive members (33) is connected to the first motor (32), and two adjacent screw drive members (33) are connected via a transmission (6).

4. The welded pipe flattening test equipment according to claim 1, characterized in that: A first electric push rod (7) is provided on the screw drive member (33), an electromagnet (8) is provided on the driving end of the first electric push rod (7), the electromagnet (8) is magnetically connected to the local extrusion plate (34), and the local extrusion plate (34) is connected to the installation chamber (31) via a plurality of limit members (9).

5. The welded pipe flattening test equipment according to claim 4, characterized in that: The limiting member (9) comprises: a first hydraulic telescopic device (91) and a support plate (92); a plurality of slots (10) are provided on the local extrusion plate (34); the plurality of slots (10) correspond one-to-one to the plurality of limiting members (9); the first hydraulic telescopic device (91) is provided on the installation bin (31); the support plate (92) is provided at the driving end of the first hydraulic telescopic device (91); and the support plate (92) is slidably connected to the slots (10).

6. The welded pipe flattening test equipment according to claim 1, characterized in that: The rotating device (5) comprises: a moving block (51), a second motor (52), a bevel gear set (53) and a rotating shaft (54), wherein the moving block (51) is arranged on the press (2), a mounting groove (55) is provided in the moving block (51), the rotating shaft (54) is rotatably arranged in the mounting groove (55) through a bearing seat, the second motor (52) is connected to the rotating shaft (54) through the bevel gear set (53), and the rotating shaft (54) is connected to the local extrusion module (3).

7. The welded pipe flattening test equipment according to claim 1, characterized in that: The extrusion table (1) comprises: a base (101), a workbench (102), a third motor (103), a driving wheel (104), a support rod (105), a driven wheel (106) and a transmission chain (107), wherein the third motor (103) is arranged on the base (101), the driving wheel (104) is arranged on the driving end of the third motor (103), the support rod (105) is rotatably arranged on the base (101), the driven wheel (106) is arranged on the support rod (105), the driving wheel (104) is connected to the driven wheel (106) through the transmission chain (107), and the workbench (102) is arranged at the top end of the support rod (105).

8. The welded pipe flattening test equipment according to claim 7, characterized in that: An annular groove (11) is provided on the workbench (102), a plurality of second electric push rods (12) are provided in the annular groove (11), a protective cover (13) is slidably connected in the annular groove (11), the protective cover (13) is connected to the driving end of the second electric push rod (12), and the local extrusion module (3) and the overall extrusion module (4) are respectively slidably connected to the protective cover (13).

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