Local roundness correction device for pipe end of steel pipe

Abstract

The utility model provides a steel pipe end local roundness correcting device, which belongs to the technical field of steel pipe processing and manufacturing and comprises a base, a mounting frame is arranged on the base, a first cantilever and a second cantilever which are oppositely arranged up and down are arranged on the mounting frame, and a shape correcting pressure head and a supporting pressure head are arranged between the first cantilever and the second cantilever. The shape righting pressing head is connected to the first cantilever through the first hydraulic oil cylinder, the two supporting pressing heads are arranged on the second cantilever in a spaced mode, the shape righting pressing head is located above the supporting pressing heads and located between the two supporting pressing heads, and the round righting portion of the steel pipe is inserted between the shape righting pressing head and the supporting pressing heads. The two supporting pressure heads are used for supporting the steel pipe, the first hydraulic oil cylinder acts to drive the shape correcting pressure head to move downwards, and shape correction is conducted by abutting against the round correcting part of the steel pipe. The local rounding device for the pipe end of the steel pipe is convenient to use, the deformed position of the pipe end of the steel pipe can be accurately corrected, and the correcting efficiency of the pipe end of the steel pipe is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel pipe processing and manufacturing, and more specifically relates to a local rounding device for a steel pipe end. Background Art

[0002] Because China's modern long-distance pipeline construction exclusively utilizes automated welding and automatic inspection equipment, the roundness requirements for steel pipe ends are extremely high. The American Petroleum Institute (API) 5L standard and GB / T9711 stipulate that the ovality of steel pipe ends must not exceed 2%D, and the local out-of-roundness must not exceed 3.2mm. The inspection range is D / 4 or 200mm, whichever is smaller. PetroChina requires 0.6%D, while the National Pipeline Network requires 0.5%D or even 0.4%D. In bidding and tendering, the highest score is awarded for a local out-of-roundness of no more than 0.5mm. During pipeline network construction, local out-of-roundness of steel pipe ends makes it difficult to assemble the pipes on site, hindering construction efficiency. Conventional mechanical expansion and straightening methods generally cannot meet the internal control requirements for local out-of-roundness of steel pipe ends. Utility Model Content

[0003] The purpose of the utility model is to provide a local rounding device for steel pipe ends, which can accurately correct the deformed parts of the steel pipe ends, so that the out-of-roundness of the pipe ends meets the requirements and improve the correction efficiency of the steel pipe ends.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a local rounding device for the end of a steel pipe, comprising a base, a mounting frame provided on the base, the mounting frame provided with a first cantilever and a second cantilever, the first cantilever and the second cantilever are arranged opposite to each other up and down, a corrective pressure head and a supporting pressure head are provided between the first cantilever and the second cantilever, the corrective pressure head is connected to the first cantilever through a first hydraulic cylinder, the number of the supporting pressure heads is two, the two supporting pressure heads are arranged at intervals on the second cantilever, the corrective pressure head is located above the supporting pressure head and between the two supporting pressure heads, the rounding part of the steel pipe is inserted between the corrective pressure head and the supporting pressure heads, the two supporting pressure heads are used to support the steel pipe, and the first hydraulic cylinder is actuated to drive the corrective pressure head to move downward to perform correction by pressing against the rounding part of the steel pipe.

[0005] In a possible implementation, the distance between the two supporting pressure heads is L, L=200 mm or L=D / 4, where D is the diameter of the steel pipe.

[0006] In a possible implementation, the pressing end of the orthopedic pressure head and the supporting end of the supporting pressure head are both rotatably connected to pressure wheels, and the pressure wheels are used to contact the steel pipe.

[0007] In a possible implementation, the mounting bracket is slidably disposed on the base, and a first driver is provided on the base. The first driver is used to drive the mounting bracket to slide horizontally on the base.

[0008] In a possible implementation, a connecting block is slidably provided on the mounting frame, the first cantilever and the second cantilever are provided on the connecting block, and a second driver is further provided on the mounting frame, and the second driver is used to drive the connecting block to slide up and down.

[0009] In a possible implementation, a second hydraulic cylinder is provided at one end of the second cantilever facing the first cantilever, an actuating end of the second hydraulic cylinder is connected to a support block, and the two support pressure heads are provided on the support block.

[0010] In one possible implementation, the mounting frame includes a transverse block and a longitudinal block, the transverse block is slidably arranged on the base, the first driver is used to drive the transverse block to slide, the longitudinal block is connected to the transverse block, and the connecting block and the second driver are both arranged on the longitudinal block.

[0011] In one possible implementation, a longitudinal groove is provided in the middle portion of the longitudinal block along its length direction, the connecting block includes a connecting portion and a driving portion, the first cantilever and the second cantilever are connected to the connecting portion, the driving portion is passed through the longitudinal groove and is slidably connected to the longitudinal groove, the second driver is a linear driver, the linear driver is arranged at the top of the longitudinal block, the driving end of the linear driver passes downward through the longitudinal block and extends into the longitudinal groove and is connected to the driving portion.

[0012] In one possible implementation, the longitudinal slide groove passes through the longitudinal block transversely, the transverse width of the connecting portion is greater than the transverse width of the longitudinal slide groove, an anti-slip plate is provided at one end of the driving portion away from the connecting portion, the anti-slip plate is located outside the longitudinal slide groove, the transverse width of the anti-slip plate is greater than the transverse width of the longitudinal slide groove, and balls are provided between the connecting portion and the longitudinal block and between the anti-slip plate and the longitudinal block.

[0013] In a possible implementation, a reinforcing rib is connected between the transverse block and the longitudinal block.

[0014] The beneficial effect of the local rounding device for steel pipe ends provided by the utility model is that, compared with the existing technology, the local rounding device for steel pipe ends provided by the utility model inserts the rounding portion of the steel pipe between the correcting pressure head and the supporting pressure head. By controlling the first hydraulic cylinder to drive the correcting pressure head to press against the rounding portion of the steel pipe, the deformed portion of the steel pipe end can be accurately corrected, so that the steel pipe end meets the out-of-roundness requirements. The local rounding device for steel pipe ends provided by the utility model is easy to use, can accurately correct the deformed portion of the steel pipe end, and improves the correction efficiency of the steel pipe end. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 A schematic diagram of the main structure of a device for locally rounding a steel pipe end provided by an embodiment of the present utility model;

[0017] Figure 2 A left-side structural schematic diagram of a local rounding device for a steel pipe end provided by an embodiment of the present utility model;

[0018] Figure 3 For the Figure 1 Cross-sectional structural diagram along line AA;

[0019] Figure 4 This is a schematic diagram of rounding when the end of a steel pipe partially bulges outward;

[0020] Figure 5 This is a schematic diagram of rounding when the end of a steel pipe is partially concave inward.

[0021] Description of reference numerals:

[0022] 1. Base; 101. T-slot; 2. Mounting frame; 21. Horizontal block; 211. T-slider; 22. Longitudinal block; 221. Longitudinal slide; 3. First cantilever; 4. Second cantilever; 5. Orthopedic pressure head; 51. First hydraulic cylinder; 6. Support pressure head; 61. Second hydraulic cylinder; 62. Support block; 7. Connecting block; 71. Connecting part; 72. Driving part; 73. Anti-slip plate; 74. Ball; 8. First drive; 9. Second drive; 10. Reinforcement rib; 100. Steel pipe; 200. Pressure wheel. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0025] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0027] See also Figures 1 to 3 The present invention provides a device for partially rounding the end of a steel pipe. The device comprises a base 1, a mounting frame 2 provided on the base 1, a first cantilever 3 and a second cantilever 4 provided on the mounting frame 2, the first cantilever 3 and the second cantilever 4 being arranged vertically opposite to each other, a corrective pressure head 5 and a supporting pressure head 6 being provided between the first cantilever 3 and the second cantilever 4, the corrective pressure head 5 being connected to the first cantilever 3 via a first hydraulic cylinder 51, two supporting pressure heads 6 being provided at intervals on the second cantilever 4, the corrective pressure head 5 being located above the supporting pressure heads 6 and between the two supporting pressure heads 6, the rounding portion of the steel pipe 100 being inserted between the corrective pressure heads 5 and the supporting pressure heads 6, the two supporting pressure heads 6 being used to support the steel pipe 100, the first hydraulic cylinder 51 being actuated to drive the corrective pressure head 5 downward to correct the rounding portion of the steel pipe 100 by pressing against the corrective pressure head 5.

[0028] The present invention provides a device for partially rounding the end of a steel pipe. Compared to the prior art, the rounding portion of a steel pipe 100 is inserted between a correcting ram 5 and a supporting ram 6. By controlling a first hydraulic cylinder to drive the correcting ram 5 against the rounding portion of the steel pipe 100, the deformed portion of the end of the steel pipe 100 can be precisely corrected, ensuring that the end of the steel pipe 100 meets the out-of-roundness requirements. The present invention provides a device for partially rounding the end of a steel pipe. It is easy to use, can accurately correct the deformed portion of the end of the steel pipe 100, and improves the correcting efficiency of the end of the steel pipe 100.

[0029] In this embodiment, the two supporting pressure heads 6 and the corrective pressure head 5 are in the same vertical plane, and the distance between the two supporting pressure heads 6 is L. In order to ensure the best correction effect on the steel pipe 100, L=200mm, or L=D / 4 is set, where D is the diameter of the steel pipe 100. In actual application, when the actual value of L conflicts, the smaller value between 200mm and D / 4 is selected as the actual setting value.

[0030] In this example, see Figures 4 and 5 ,in, Figure 4 This is a schematic diagram of rounding when the end of the steel pipe 100 partially bulges outward. Figure 5 This is a schematic diagram of rounding when the end of the steel pipe 100 is partially concave inward. During the rounding process of the steel pipe 100, as the correcting pressure head 5 is pressed down, the supporting pressure head 6 will slide relatively on the side wall of the steel pipe 100. In order to reduce the friction between the correcting pressure head 5 and the supporting pressure head 6 and the steel pipe 100, the pressure wheel 200 is rotatably connected to the pressing end of the correcting pressure head 5 and the supporting end of the supporting pressure head 6. During the rounding process of the local end of the steel pipe 100, the pressure wheel 200 contacts the steel pipe 100 to reduce the friction, so as to facilitate the relative movement between the steel pipe 100 and the supporting pressure head 6, thereby avoiding the appearance of indentations on the side wall of the steel pipe 100.

[0031] In some embodiments, see Figures 1 to 3A second hydraulic cylinder 61 is provided at the end of the second cantilever 4 facing the first cantilever 3. The actuating end of the second hydraulic cylinder 61 is connected to a support block 62. Two support rams 6 are mounted on the support block 62. The mounting frame 2 is slidably mounted on the base 1. The base 1 is provided with a first driver 8. The first driver 8 is used to drive the mounting frame 2 to slide horizontally on the base 1. A connecting block 7 is slidably mounted on the mounting frame 2. The first cantilever 3 and the second cantilever 4 are mounted on the connecting block 7. The mounting frame 2 is also provided with a second driver 9. The second driver 9 is used to drive the connecting block 7 to slide up and down. In use, through the above arrangement, the first cantilever 3 and the second cantilever 4 can drive the corrective ram 5 and the support ram 6 to move in space through the action of the first driver 8 and the second driver 9, facilitating the alignment of the corrective ram 5 and the support ram 6 with the rounded portion of the steel pipe 100, thereby allowing the rounded portion of the steel pipe 100 to be easily inserted between the corrective ram 5 and the support ram 6.

[0032] Specifically, the mounting frame 2 includes a transverse block 21 and a longitudinal block 22. The transverse block 21 is slidably arranged on the base 1. On the upper end surface of the base 1, two horizontally arranged T-slots 101 are provided along its length direction. A T-shaped slider 211 adapted to the T-slot 101 is provided at the bottom of the transverse block 21. With the help of the T-shaped slider 211 and the T-slot 101, the transverse slider is slidably connected to the base 1. In this embodiment, the first driver 8 is a hydraulic cylinder fixed to the base 1. The first driver 8 is located between the two T-slots 101. The action end of the first driver 8 is connected to the transverse block 21. When the first driver 8 is actuated, it can drive the transverse block 21 to slide horizontally on the base 1.

[0033] The longitudinal block 22 is connected to the transverse block 21, and the connecting block 7 and the second driver 9 are both arranged on the second block. A longitudinal slide groove 221 is provided in the middle of the longitudinal block 22 along its length direction. The connecting block 7 includes a connecting part 71 and a driving part 72. The first cantilever 3 and the second cantilever 4 are connected to the connecting part 71. The driving part 72 is passed through the longitudinal slide groove 221 and is slidably connected to the longitudinal slide groove 221. In this embodiment, the second driver 9 is a linear driver. The linear driver can optionally use a hydraulic cylinder. The linear driver is arranged at the top of the longitudinal block 22. The driving end of the linear driver passes downward through the longitudinal block 22 and extends into the longitudinal slide groove 221 and is connected to the driving part 72.

[0034] When the locking cam 72 is in the unlocked position, the locking cam 72 is in the unlocked position, and the locking cam 72 is in the unlocked position, so that the locking cam 72 can be locked to the unlocked position.

[0035] Optionally, in order to improve the connection strength between the longitudinal block 22 and the transverse block 21, a reinforcing rib 10 is welded and fixed between the transverse block 21 and the longitudinal block 22. In this embodiment, there are two reinforcing ribs 10, and the two reinforcing ribs 10 are symmetrically arranged on both sides of the longitudinal slide groove 221.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for locally rounding the end of a steel pipe, characterized in that: The invention comprises a base (1), a mounting frame (2) is provided on the base (1), the mounting frame (2) is provided with a first cantilever (3) and a second cantilever (4), the first cantilever (3) and the second cantilever (4) are arranged opposite to each other in an upper and lower direction, a correction pressure head (5) and a support pressure head (6) are provided between the first cantilever (3) and the second cantilever (4), the correction pressure head (5) is connected to the first cantilever (3) through a first hydraulic oil cylinder (51), the number of the support pressure heads (6) is two, and the two support pressure heads (6) are provided at the same time. The heads (6) are arranged on the second cantilever (4) at intervals, the corrective pressure head (5) is located above the supporting pressure head (6) and between the two supporting pressure heads (6), the rounded portion of the steel pipe (100) is inserted between the corrective pressure head (5) and the supporting pressure head (6), the two supporting pressure heads (6) are used to support the steel pipe (100), and the first hydraulic cylinder (51) is actuated to drive the corrective pressure head (5) to move downward, and perform correction by pressing the rounded portion of the steel pipe (100).

2. A device for local rounding of steel pipe ends according to claim 1, characterized in that: The distance between the two supporting pressure heads (6) is L, L=200 mm or L=D / 4, wherein D is the diameter of the steel pipe (100).

3. A device for local rounding of steel pipe ends according to claim 1, characterized in that: The pressing end of the orthopedic pressure head (5) and the supporting end of the supporting pressure head (6) are both rotatably connected to a pressure wheel (200), and the pressure wheel (200) is used to contact the steel pipe (100).

4. A device for local rounding of steel pipe ends according to claim 1, characterized in that: The mounting frame (2) is slidably arranged on the base (1); a first driver (8) is provided on the base (1); the first driver (8) is used to drive the mounting frame (2) to slide in a horizontal direction on the base (1).

5. A device for local rounding of steel pipe ends according to claim 4, characterized in that: A connecting block (7) is slidably provided on the mounting frame (2), the first cantilever (3) and the second cantilever (4) are provided on the connecting block (7), and a second driver (9) is further provided on the mounting frame (2), the second driver (9) being used to drive the connecting block (7) to slide up and down.

6. A device for local rounding of steel pipe ends according to claim 1, characterized in that: A second hydraulic cylinder (61) is provided at one end of the second cantilever (4) facing the first cantilever (3); an actuating end of the second hydraulic cylinder (61) is connected to a support block (62); and the two support pressure heads (6) are arranged on the support block (62).

7. A device for local rounding of steel pipe ends according to claim 5, characterized in that: The mounting frame (2) comprises a transverse block (21) and a longitudinal block (22); the transverse block (21) is slidably arranged on the base (1); the first driver (8) is used to drive the transverse block (21) to slide; the longitudinal block (22) is connected to the transverse block (21); and the connecting block (7) and the second driver (9) are both arranged on the longitudinal block (22).

8. A device for local rounding of steel pipe ends according to claim 7, characterized in that: A longitudinal slide groove (221) is provided in the middle of the longitudinal block (22) along its length direction. The connecting block (7) includes a connecting portion (71) and a driving portion (72). The first cantilever (3) and the second cantilever (4) are connected to the connecting portion (71). The driving portion (72) is arranged in the longitudinal slide groove (221) and is slidably connected to the longitudinal slide groove (221). The second driver (9) is a linear driver. The linear driver is arranged at the top of the longitudinal block (22). The driving end of the linear driver passes through the longitudinal block (22) downward and extends into the longitudinal slide groove (221) and is connected to the driving portion (72).

9. A device for local rounding of steel pipe ends according to claim 8, characterized in that: The longitudinal slide groove (221) passes through the longitudinal block (22) transversely, the transverse width of the connecting portion (71) is greater than the transverse width of the longitudinal slide groove (221), an anti-slip plate (73) is provided at one end of the driving portion (72) away from the connecting portion (71), the anti-slip plate (73) is located outside the longitudinal slide groove (221), the transverse width of the anti-slip plate (73) is greater than the transverse width of the longitudinal slide groove (221), and balls (74) are provided between the connecting portion (71) and the longitudinal block (22) and between the anti-slip plate (73) and the longitudinal block (22).

10. The device for local rounding of steel pipe ends according to claim 7, characterized in that: A reinforcing rib (10) is connected between the transverse block (21) and the longitudinal block (22).

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