Roundness adjusting device for pressure steel pipeline

Abstract

The utility model discloses a roundness adjusting device for a pressure steel pipeline. Comprising a control device, a pipeline body, eight sets of supporting frames circumferentially and equally distributed on the inner side wall of the pipeline body, a first hydraulic cylinder coaxially arranged with the pipeline body, an electric hydraulic pump, two sets of supporting discs and sixteen sets of supporting arms rotationally connected between the eight sets of supporting frames and the two sets of supporting discs correspondingly. According to the utility model, the contact pressure of each group of supporting plates in contact with the inner side wall of the pipeline body can be detected through the pressure sensors during roundness adjustment, so that the control device can conveniently identify the deformation condition of the opening part of the pipeline body, and the connection position of each group of supporting arms and the supporting disc can be conveniently adjusted through a plurality of groups of second hydraulic cylinders; therefore, the supporting frame and the supporting plate connected with the adjusted supporting arm can obtain supporting force different from supporting force of other sets of supporting frames and supporting plates, the situation that a pipeline body deforms and locally rebounds during rounding is eliminated, and the rounding operation efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure steel pipeline processing, in particular to a pressure steel pipeline rounding device. Background Art

[0002] The existing penstock rounding and butting devices use screw tensioners, screw compressors, and homemade presses in conjunction with jacks. This has low efficiency and requires welding, which results in numerous processes and is difficult to guarantee quality. Furthermore, welds often break due to excessive stress, leading to frequent safety accidents and low safety.

[0003] In order to solve the above problems, a public technology has been proposed. It is a new hydraulic roundness adjustment and misalignment adjustment device for pressure steel pipes. Through 16 connecting pins, 8 pairs of supporting vertical frames, 8 pairs of supporting horizontal arms, top fixed discs, and middle adjustable discs are connected into a whole. Then the middle adjustable disc is fixed to the outer wall of the hydraulic cylinder through a locking nut. The supporting horizontal arms can be replaced according to the different pipe diameters to be adjusted. The angle between the corresponding upper and lower supporting horizontal arms on the same vertical plane is 30°≤β≤60°. This new hydraulic roundness adjustment and misalignment adjustment device for pressure steel pipes can safely and reliably complete the roundness adjustment of pressure steel pipes. The device is suitable for the manufacture of pressure steel pipes, and can also be used for on-site pipeline installation and seam compression. The device can be used vertically and horizontally and has a wide range of applications. The locking nut can be rotated up and down to adjust the opening and closing angle of the supporting horizontal arm, or it can be adjusted by replacing the supporting horizontal arm with different lengths to adjust the applicable pipe diameter.

[0004] However, the above-mentioned disclosed technology still has certain drawbacks in actual application. When the pipe mouth of the pressure steel pipeline is rounded, there is a certain rebound. When the inward deformation is rounded, a greater pressure needs to be applied to the inward deformation than other parts to offset the rebound. In order to avoid the need for multiple reciprocating adjustments to achieve the purpose of rounding as much as possible, it is necessary to improve and optimize the structure of the above-mentioned device. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a penstock rounding device.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a penstock circular adjustment device, comprising a control device, a pipeline body, eight groups of support frames equally distributed on the inner side wall of the pipeline body in a circle, a first hydraulic cylinder coaxially arranged with the pipeline body, an electric hydraulic pump, two groups of support plates, and sixteen groups of support arms rotatably connected between the eight groups of support frames and the two groups of support plates, wherein the support frame is slidably connected to a support plate on one side of the inner side wall of the pipeline body through four groups of guide rods, a pressure detection structure for detecting the support pressure is provided between the support plate and the support frame, and a useful An elastic structure is provided for separating the support plate from the support frame after the circle adjustment is completed, and the side wall of the support plate is provided with an adjustment structure for adjusting the angle between the axis center line of each group of support arms and the axis center line of the first hydraulic cylinder respectively. Two groups of second rotating seats are sequentially provided on the side of the support frame facing the axis center of the pipeline body along the length direction of the axis center of the pipeline body. The sixteen groups of support arms are arranged in groups of two and are rotatably connected to the two groups of second rotating seats on the eight groups of support frames respectively. The two groups of support arms on any group of support frames are rotatably connected to the two groups of support plates through a group of first rotating seats at one end away from the support frame, and the first rotating seat is slidably connected to the support plate through a slider.

[0007] As a further description of the above technical solution:

[0008] The inner wall of the support plate is provided with eight groups of sliding grooves, and the eight groups of sliding grooves are equally distributed in a circle with the axis of the support plate as the center. The eight groups of sliding grooves and the side away from the axis of the support plate are provided with openings that pass through the outer wall of the support plate. The slider is slidably connected to the inner wall of the sliding groove, and the first rotating seat is fixedly connected to the side of the slider away from the axis of the support plate and the first rotating seat is slidably connected to the inner wall of the opening.

[0009] As a further description of the above technical solution:

[0010] The adjustment structure includes multiple groups of second hydraulic cylinders, and the left and right ends of the two groups of support plates are respectively fixedly connected to a group of left baffles and right baffles. The multiple groups of second hydraulic cylinders are respectively fixedly connected to the side of the two groups of left baffles away from the right baffle and are respectively opposite to the multiple groups of sliders on the left and right. The end of the extended shaft of the second hydraulic cylinder passes through the inner wall of the left baffle and extends between the left baffle and the right baffle. The outer wall of the extended shaft of the second hydraulic cylinder is distributed with limiting rings and locking nuts on the left and right. The slider is fixedly connected to the outer wall of the extended shaft of the second hydraulic cylinder and is located between the limiting ring and the locking nut. The slider is fixedly connected to the extended shaft of the second hydraulic cylinder through the limiting ring and the locking nut.

[0011] As a further description of the above technical solution:

[0012] The four groups of guide rods are all fixedly connected to one side of the support plate facing the support frame and are respectively close to the four corners of the side. The ends of the guide rods away from the support plate all pass through the support frame and are slidably connected thereto.

[0013] As a further description of the above technical solution:

[0014] The elastic structure includes four groups of mounting grooves and springs. The four groups of mounting grooves are arranged on the side of the support frame facing the support plate and correspond to the four groups of guide rods respectively. The four groups of springs are respectively arranged inside the four groups of mounting grooves and respectively sleeved on the outer walls of the four groups of guide rods.

[0015] As a further description of the above technical solution:

[0016] The pressure detection structure comprises two groups of pressure sensors, and both groups of pressure sensors are fixedly connected to one side of the support frame facing the support plate.

[0017] As a further description of the above technical solution:

[0018] An anti-slip block is provided at one end of the guide rod away from the support plate, and a buffer pad is provided on the side of the anti-slip block facing the support plate.

[0019] The utility model has the following beneficial effects:

[0020] 1. Compared with the existing technology, this penstock rounding device can detect the contact pressure of each group of support frames and support plates when they contact the inner wall of the pipe body during rounding by using a pressure sensor installed on the side of the support frame facing the inner wall of the pipe body. This makes it easier for the control device to identify the deformation of the pipe body mouth and facilitate the adjustment structure to adjust the angle of the support arm at the corresponding position.

[0021] 2. Compared with the existing technology, the penstock rounding device can adjust the connection position of each group of support arms and support plates through multiple groups of second hydraulic cylinders, which can adjust the angle between the axis of the support arm and the axis of the first hydraulic cylinder. In this way, the support frame and support plate connected to the adjusted support arm can obtain a different supporting force from other groups of support frames and support plates, so as to eliminate the local rebound of the pipe body deformation during rounding, and greatly improve the efficiency of the rounding operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a side view of the overall structure of the penstock rounding device proposed by the present invention;

[0023] Figure 2 The utility model proposes a pressure steel pipe rounding device Figure 1 A partial enlarged view of point A in the middle;

[0024] Figure 3 This is a partial cross-sectional diagram of the pipe body, first hydraulic cylinder, support arm, support frame and support plate connection structure of the penstock rounding device proposed in the utility model;

[0025] Figure 4 The utility model proposes a pressure steel pipe rounding device Figure 3 A partial enlarged view of point B in the middle;

[0026] Figure 5 This is a partial schematic diagram of the connection structure of the second hydraulic cylinder and the slider of the penstock rounding device proposed in the present invention;

[0027] Figure 6 This is a side cross-sectional schematic diagram of the support frame and support plate connection structure of the penstock rounding device proposed in the present invention;

[0028] Figure 7 This is a cross-sectional schematic diagram of the connection structure of the support frame, support plate and guide rod of the pressure steel pipeline rounding device proposed by the utility model.

[0029] Legend:

[0030] 1. Pipe body; 2. First hydraulic cylinder; 3. Support plate; 4. Slide; 5. Slider; 6. First rotating seat; 7. Support arm; 8. Left baffle; 9. Right baffle; 10. Second hydraulic cylinder; 11. Support frame; 12. Support plate; 13. Guide rod; 14. Anti-slip block; 15. Buffer pad; 16. Limiting ring; 17. Locking nut; 18. Pressure sensor; 19. Mounting slot; 20. Spring; 21. Second rotating seat. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Reference Figures 1 to 7The penstock circular adjustment device provided by the present invention comprises a control device, a pipe body 1, eight groups of support frames 11 equally distributed on the inner side wall of the pipe body 1, a first hydraulic cylinder 2 coaxially arranged with the pipe body 1, an electric hydraulic pump, two groups of support plates 3, and sixteen groups of support arms 7 rotatably connected between the eight groups of support frames 11 and the two groups of support plates 3. The control device is a common controller on the market with signal receiving, signal processing, and calculation functions. In this embodiment, the connection between the first hydraulic cylinder 2, the second hydraulic cylinder 10, and the electric hydraulic pump is consistent with the prior art, and is connected via hydraulic pipelines.

[0033] like Figure 1 、 Figure 2 、 Figure 3 as well as Figure 4 As shown, in order to drive the eight groups of support frames 11 to support from the inside of the pipe body 1 outward when the two groups of support plates 3 are close to each other, two groups of second rotating seats 21 are sequentially provided on the side of the support frame 11 facing the axis of the pipe body 1 along the axis length direction of the pipe body 1, and the sixteen groups of support arms 7 are respectively rotatably connected with the two groups of second rotating seats 21 on the eight groups of support frames 11 in groups of two. The two groups of support arms 7 on any group of support frames 11 are respectively rotatably connected with the two groups of support plates 3 through a group of first rotating seats 6 at one end away from the support frame 11. The first rotating seat 6 is slidably connected to the support plate 3 through a slider 5. Eight groups of sliding grooves 4 are provided on the inner wall of the support plate 3. The eight groups of slide grooves 4 are equally distributed on the circumference with the axis of the support plate 3 as the center. The eight groups of slide grooves 4 and the side away from the axis of the support plate 3 are provided with an opening that penetrates the outer wall of the support plate 3. The slider 5 is slidably connected to the inner wall of the slide groove 4, and the first rotating seat 6 is fixedly connected to the side of the slider 5 away from the axis of the support plate 3 and the first rotating seat 6 is slidably connected to the inner wall of the opening. The two groups of support plates 3 are linked to the eight groups of support frames 11 through the sixteen groups of support arms 7. When the two groups of support plates 3 move relatively close to each other, the multiple groups of support frames 11 are driven to be supported in the direction away from the axis of the pipe body 1. Conversely, the multiple groups of support frames 11 are driven to move toward the axis of the pipe body 1;

[0034] like Figure 1 、 Figure 2 、 Figure 6 as well as Figure 7 As shown, in order to facilitate the installation and use of the pressure sensor 18, the support frame 11 is slidably connected to the support plate 12 on the side facing the inner wall of the pipe body 1 through four sets of guide rods 13. The four sets of guide rods 13 are fixedly connected to the side of the support plate 12 facing the support frame 11 and are respectively close to the four corners of the side. The ends of the guide rods 13 away from the support plate 12 all pass through the support frame 11 and are slidably connected thereto. Through the guide rods 13, the relative movement between the support plate 12 and the support frame 11 can be more stable.

[0035] like Figure 6As shown, in order to obtain the pressure value of each group of support plates 12 when supporting the inner wall of the pipe body 1, a pressure detection structure for detecting the support pressure is provided between the support plate 12 and the support frame 11. The pressure detection structure is two groups of pressure sensors 18. The two groups of pressure sensors 18 are fixedly connected to the side of the support frame 11 facing the support plate 12. When the two groups of support plates 3 move towards each other, the support frame 11 and the support plate 12 are driven by the support arm 7 to move toward the inner wall of the pipe body 1. When the support plate 12 contacts the inner wall of the pipe body 1, the reverse force causes the support plate 12 to squeeze the support frame 11. The reverse force can be measured more accurately by the pressure sensor 18 provided between the support frame 11 and the support plate 12. The pressure generated during support of the part with more concave deformation is necessarily greater than that of other parts. The relationship between the pressure value and the amount of deformation can be obtained through a relatively simple test, so that the angle between the corresponding two groups of support arms 7 and the axis of the first hydraulic cylinder 2 can be adjusted more conveniently through the controller to control the adjustment structure. In the position with large deformation, in order to avoid rebound after rounding, the supporting force of the part with large deformation should be adjusted to be larger. The distance between the connection point of the corresponding two groups of support arms 7 and the support plate 3 can be shortened in advance through the adjustment structure. When the two groups of support plates 3 make relative movement later, the adjusted two groups of support arms 7 can be lifted higher to generate a greater supporting force at the inner wall of the corresponding pipe body 1, thereby eliminating the rebound at the deformed part and improving the rounding work efficiency.

[0036] like Figure 7 As shown, in order to separate the support plate 12 from the support frame 11 after the circle adjustment work is completed, an elastic structure for separating the support plate 12 from the support frame 11 after the circle adjustment is completed is further provided between the support plate 12 and the support frame 11. The elastic structure includes four groups of mounting grooves 19 and springs 20. The four groups of mounting grooves 19 are all arranged on the side of the support frame 11 facing the support plate 12 and respectively correspond to the four groups of guide rods 13. The four groups of springs 20 are respectively arranged inside the four groups of mounting grooves 19 and respectively sleeved on the outer walls of the four groups of guide rods 13. The guide rods 13 are away from the support One end of the plate 12 is provided with an anti-slip block 14 for preventing slipping, and a buffer pad 15 is provided on the side of the anti-slip block 14 facing the support plate 12. After the rounding work is completed, the elastic force of the spring 20 can separate the support frame 11 from the support plate 12 to avoid continuous pressure on the pressure sensor 18 to generate a pressure signal. The anti-slip block 14 can prevent the support frame 11 from completely slipping out of the guide rod 13. The buffer pad 15 is provided to protect the support frame 11 from directly colliding with the anti-slip block 14 when the spring 20 separates the support frame 11 from the support plate 12;

[0037] like Figure 1 、 Figure 3 、 Figure 4 as well as Figure 5As shown, in order to adjust the angle between the support arm 7 and the axis center line of the first hydraulic cylinder 2, the side wall of the support plate 3 is provided with an adjustment structure for separately adjusting the angle between the axis center line of each group of support arms 7 and the axis center line of the first hydraulic cylinder 2, and the adjustment structure includes multiple groups of second hydraulic cylinders 10, and the left and right ends of the two groups of support plates 3 are respectively fixedly connected to a group of left baffles 8 and right baffles 9, and the multiple groups of second hydraulic cylinders 10 are respectively fixedly connected to the side of the two groups of left baffles 8 away from the right baffle 9 and are respectively opposite to the multiple groups of sliders 5 on the left and right. The end of the shaft extending from the second hydraulic cylinder 10 passes through the inner wall of the left baffle 8 and extends between the left baffle 8 and the right baffle 9. The outer wall of the shaft extending from the second hydraulic cylinder 10 is distributed on the left and right sides with a limiting ring 16 and a locking nut 17, and the slider 5 is fixedly connected to the outer wall of the shaft extending from the second hydraulic cylinder 10 and is located between the limiting ring 16 and the locking nut 17. The slider 5 is fixedly connected to the extended shaft of the second hydraulic cylinder 10 through a limit ring 16 and a locking nut 17. The two groups of second hydraulic cylinders 10 opposite to each other respectively control the two groups of support arms 7 on the same group of support frames 11. When the two groups of second hydraulic cylinders 10 drive the sliders 5 to move closer to each other, the distance between the ends of the two groups of support arms 7 away from the support frames 11 is shortened. At this time, the extended shaft of the first hydraulic cylinder 2 is retracted, driving the two groups of support plates 3 to move closer to each other. The support frames 11 lifted by the adjusted two groups of support arms 7 can be higher than other support frames 11, and vice versa. The height is lower than other support frames 11. Through this adjustment method and the deformation of the inner wall of the pipe body 1 detected by the pressure sensor 18, the lifting height of each support frame 11 can be effectively adjusted according to the deformation, and the circle adjustment work can be completed with fewer times.

[0038] Working principle: The two groups of support plates 3 are linked with eight groups of support frames 11 through sixteen groups of support arms 7. When the two groups of support plates 3 move relatively close to each other, multiple groups of support frames 11 are driven to be lifted in the direction away from the axis of the pipe body 1. Conversely, multiple groups of support frames 11 are driven to move toward the axis of the pipe body 1. The two groups of second hydraulic cylinders 10 opposite to each other on the left and right respectively control the two groups of support arms 7 on the same group of support frames 11. When the two groups of second hydraulic cylinders 10 drive the sliders 5 to move closer to each other, the distance between the ends of the two groups of support arms 7 away from the support frames 11 is shortened. At this time, the first hydraulic cylinder 2 extends the shaft and retracts, driving the two groups of support plates 3 to move closer to each other. The support frames 11 lifted by the adjusted two groups of support arms 7 can be lifted higher than other support frames 11, and vice versa. The height is lower than that of other support frames 11. This adjustment method is combined with the deformation of the inner wall of the pipe body 1 detected by the pressure sensor 18, and each support frame 11 can be effectively adjusted according to the deformation. The lifting height can complete the rounding work in fewer times. The pressure sensor 18 set between the support frame 11 and the support plate 12 can measure the reverse force more accurately. The part where the inner wall of the pipe body 1 is more concave and deformed, the pressure generated during support must be greater than that of other parts. The relationship between the pressure value and the amount of deformation can be obtained through a relatively simple test, so that the angle between the corresponding two groups of support arms 7 and the axis of the first hydraulic cylinder 2 can be adjusted more conveniently through the controller to control the adjustment structure. In order to avoid rebound after rounding at the position with large deformation, the supporting force of the part with large deformation should be adjusted to be larger. The distance between the connection point of the corresponding two groups of support arms 7 and the support plate 3 can be shortened in advance through the adjustment structure. When the two groups of support plates 3 make relative movement later, the adjusted two groups of support arms 7 can be lifted higher to generate a larger supporting force at the corresponding inner wall of the pipe body 1, thereby eliminating the rebound at the deformed part and improving the efficiency of rounding.

[0039] After the rounding work is completed, the elastic force of the spring 20 can separate the support frame 11 and the support plate 12 to avoid continuous pressure on the pressure sensor 18 to generate a pressure signal. The anti-slip block 14 can prevent the support frame 11 from completely falling off the guide rod 13. The buffer pad 15 is provided to protect the support frame 11 from directly colliding with the anti-slip block 14 when the spring 20 separates the support frame 11 from the support plate 12.

[0040] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Penstock rounding device, characterized by: The invention comprises a control device, a pipeline body (1), eight groups of support frames (11) equally distributed on the inner side wall of the pipeline body (1), a first hydraulic cylinder (2) coaxially arranged with the pipeline body (1), an electric hydraulic pump, two groups of support plates (3), and sixteen groups of support arms (7) rotatably connected between the eight groups of support frames (11) and the two groups of support plates (3), wherein the support frame (11) is slidably connected to a support plate (12) through four groups of guide rods (13) on one side facing the inner side wall of the pipeline body (1), a pressure detection structure for detecting the support pressure is provided between the support plate (12) and the support frame (11), and a pressure detection structure for detecting the support pressure is further provided between the support plate (12) and the support frame (11) for aligning the support plate (12) with the support frame (11) after the circle adjustment is completed. The invention relates to a separate elastic structure, wherein the side wall of the support plate (3) is provided with an adjustment structure for adjusting the angle between the axis center line of each group of support arms (7) and the axis center line of the first hydraulic cylinder (2), and the support frame (11) is provided with two groups of second rotating seats (21) in sequence along the axis length direction of the pipeline body (1) on the side facing the axis center of the pipeline body (1). The sixteen groups of support arms (7) are respectively connected to the two groups of second rotating seats (21) on the eight groups of support frames (11) in pairs, and the two groups of support arms (7) on any group of support frames (11) are connected to the two groups of support plates (3) at one end away from the support frame (11) through a group of first rotating seats (6), and the first rotating seats (6) are connected to the support plate (3) in a sliding block (5).

2. The penstock rounding device according to claim 1, characterized in that: The inner wall of the support plate (3) is provided with eight groups of slide grooves (4), and the eight groups of slide grooves (4) are equally distributed in a circle with the axis of the support plate (3) as the center. The eight groups of slide grooves (4) and the side away from the axis of the support plate (3) are provided with an opening that penetrates the outer wall of the support plate (3). The slider (5) is slidably connected to the inner wall of the slide groove (4), and the first rotating seat (6) is fixedly connected to the side of the slider (5) away from the axis of the support plate (3), and the first rotating seat (6) is slidably connected to the inner wall of the opening.

3. The penstock rounding device according to claim 2, characterized in that: The adjustment structure includes multiple groups of second hydraulic cylinders (10), and the left and right ends of the two groups of support plates (3) are respectively fixedly connected to a group of left baffles (8) and right baffles (9). The multiple groups of second hydraulic cylinders (10) are respectively fixedly connected to the side of the two groups of left baffles (8) away from the right baffle (9) and are respectively opposite to the multiple groups of sliders (5) on the left and right. The end of the extended shaft of the second hydraulic cylinder (10) passes through the inner wall of the left baffle (8) and extends between the left baffle (8) and the right baffle (9). The outer wall of the extended shaft of the second hydraulic cylinder (10) is divided into left and right and fixedly connected to the extended shaft of the second hydraulic cylinder (10) through a limiting ring (16) and a locking nut (17).

4. The penstock rounding device according to claim 3, characterized in that: The four groups of guide rods (13) are all fixedly connected to the support plate (12) and are provided with a limit ring (16) and a locking nut (17) toward the support frame. The slider (5) is fixedly connected to the outer wall of the shaft extending from the second hydraulic cylinder (10) and is located between the limit ring (16) and the locking nut (17). One side of the slider (5) (11) and close to the four corners of the side, the ends of the guide rods (13) away from the support plate (12) all penetrate the support frame (11) and are slidably connected thereto.

5. The penstock rounding device according to claim 4, characterized in that: The elastic structure comprises four groups of mounting grooves (19) and springs (20). The four groups of mounting grooves (19) are all arranged on one side of the support frame (11) facing the support plate (12) and respectively correspond to the four groups of guide rods (13). The four groups of springs (20) are respectively arranged inside the four groups of mounting grooves (19) and respectively sleeved on the outer walls of the four groups of guide rods (13).

6. The penstock rounding device according to claim 5, characterized in that: The pressure detection structure comprises two groups of pressure sensors (18), and both groups of pressure sensors (18) are fixedly connected to a side of the support frame (11) facing the support plate (12).

7. The penstock rounding device according to claim 6, characterized in that: An anti-slip block (14) for preventing slipping is provided at one end of the guide rod (13) away from the support plate (12), and a buffer pad (15) is provided on the side of the anti-slip block (14) facing the support plate (12).

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