A steel plate straightening device and method for LNG storage tank processing

Abstract

The present invention discloses a steel plate correction device and method for LNG storage tank processing, which relates to the technical field of metal plate processing, including a steel plate and a frame, and also includes a correction unit, a support unit and a limit unit installed on the frame; the correction unit includes two rotating rollers rotatably installed on the frame and a plurality of correction rollers that can be raised and lowered, the rotating rollers drive the steel plate to move, and the correction rollers correct the moving steel plate. The advantage is that when correcting the edge of the steel plate, the present invention can not only limit the two sides of the steel plate to keep the steel plate stable and horizontal when entering the correction unit for correction, but also use the support unit to support the steel plate, and can automatically change the support position according to the shape of the steel plate to ensure that the bottom height of the steel plate remains constant when entering the correction unit for correction, thereby improving the correction quality. In addition, the degree of deformation of the steel plate edge can be detected before detection, and the steel plate can be subjected to different degrees of pressure correction according to the degree of deformation.

Description

Technical Field

[0001] The present invention relates to the technical field of metal plate processing, and in particular to a steel plate correction device and method for processing LNG storage tanks. Background Art

[0002] Liquefied natural gas (LNG) storage tanks are key equipment for storing and transporting LNG. Their manufacturing quality is directly related to energy security and service life. LNG storage tanks are usually made of high-strength steel plates. Since the steel plates may be affected by external forces or temperature changes during transportation, storage or processing, they may cause bending, twisting or local deformation of the steel plates. In particular, after cutting, the edges of the steel plates will produce large deformations, so the steel plates need to be corrected.

[0003] Currently, the commonly used correction device is a roller press, which flattens and corrects the steel plate by rotating the upper and lower rollers of the roller press. Publication No. CN111014347B discloses a hydraulic two-roller correction device and its use method, which includes an upper roller and a lower roller parallel to each other, and the upper roller is equipped with multiple upper pressure wheels, and the lower roller is equipped with a lower pressure wheel corresponding to the position between the adjacent upper pressure wheels of the upper roller; the lower roller is connected to a hydraulic motor system, and the hydraulic motor system can drive the lower roller to rotate so that the steel plate welding component placed between the upper roller and the lower roller moves forward, and the upper pressure wheel applies downward pressure to the steel plate welding component to achieve welding deformation correction.

[0004] The above-mentioned correction equipment solves the problem in the existing technology that the press is used for segmented correction, which easily causes indentations on the steel plate and the work efficiency of segmented correction is low. It can effectively correct the welding deformation of the steel plate, avoid indentations caused by steel plate correction, and is easy to operate, fast and efficient.

[0005] When the above-mentioned correction equipment and the existing correction device are used in practice, since the lengths of the upper and lower pressure rollers are fixed, and the width and length of the steel plate are not fixed values, the steel plate is inserted between the upper and lower pressure rollers during the correction process, and the steel plate is driven to move between the upper and lower pressure rollers by the rotation of the upper and lower pressure rollers. Since the steel plate has a certain degree of deformation, and the friction between the steel plate and the upper and lower pressure rollers is different, and the friction between the steel plate and each part of the upper and lower pressure rollers is also different, the friction force is used to drive the steel plate to move, and there is a situation where the friction force is uneven, causing the steel plate to shift between the upper and lower pressure rollers. This will lead to a reduction in the correction effect, and it is easy to cause local over-correction or under-correction, and the correction stability is poor.

[0006] Therefore, a new type of steel plate correction device and method for LNG storage tank processing can be used to solve the shortcomings of the existing technology. Summary of the Invention

[0007] The purpose of the present invention is to solve the problem of unstable correction caused by steel plate deviation in the prior art, and to propose a steel plate correction device and method for LNG storage tank processing.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A steel plate straightening device for LNG storage tank processing includes a steel plate and a frame, and also includes a straightening unit, a supporting unit, and a limiting unit installed on the frame;

[0010] The straightening unit includes two rotating rollers rotatably mounted on a frame and a plurality of straightening rollers that can be raised and lowered. The rotating rollers drive the steel plate to move, and the straightening rollers straighten the moving steel plate. The straightening unit also includes a drive assembly that cooperates with the rotating rollers.

[0011] The supporting unit includes two supporting frames fixedly mounted on the frame and a plurality of supporting blocks mounted on the corresponding supporting frames, for supporting the steel plate, and an adjusting assembly is installed between the two supporting frames and the corresponding plurality of supporting blocks;

[0012] There are two groups of limit units, which are located on both sides of the frame. They include two limit frames installed on the frame. A limit roller that cooperates with the steel plate is rotatably installed on the two limit frames. A second motor that cooperates with the limit roller is fixedly installed on the limit frame. The two limit rollers are used to limit the steel plate. A constant pressure component that cooperates with the limit frame is installed on the frame, and a support detection component is installed on the limit roller.

[0013] Preferably, two correction hydraulic cylinders are fixedly installed on the frame, and the telescopic ends of the two correction hydraulic cylinders are fixedly installed with a plate that is slidably connected to the frame. Each of the correction rollers is rotationally connected to the two plates, and a first pressure sensor is installed between the telescopic ends of the correction hydraulic cylinders and the plates.

[0014] Preferably, the driving assembly includes a first motor fixedly mounted on a frame, a reducer connected to a driving end of the first motor, a second gear fixedly mounted on a driving end of the reducer, a first gear fixedly mounted on each of the two rotating rollers, a third gear rotatably mounted on the frame and meshing with the two first gears, and the second gear meshing with one of the first gears.

[0015] Preferably, the adjustment assembly includes a plurality of sliding sleeves slidably mounted on the support frame through sliding rods, and the support frame is equipped with a range adjustment mechanism that cooperates with the plurality of sliding sleeves, each of the sliding sleeves is fixedly mounted with a cross frame, each of the cross frame is fixedly mounted with a limiting ring, and each limiting ring is slidably mounted with a sliding rod, and each sliding rod is fixedly connected to the corresponding support block, wherein a two-way telescopic plate is jointly fixedly mounted on the two limiting rings located in the middle, and a second electric push rod is fixedly mounted in the middle part of the two-way telescopic plate, and a cross rod is jointly fixedly mounted on the plurality of sliding rods, and the telescopic end of the second electric push rod is fixedly connected to the cross rod.

[0016] Preferably, the range adjustment mechanism includes a spacing adjustment plate slidably mounted on the support frame, a plurality of guide grooves are provided on the spacing adjustment plate, and a rotating column that cooperates with the corresponding guide groove is rotatably mounted on each of the sliding sleeves. A first electric push rod is fixedly mounted on the spacing adjustment plate, and the telescopic end of the first electric push rod is fixedly connected to the support frame.

[0017] Preferably, the constant pressure assembly includes a hydraulic rod rotatably mounted on a frame, the telescopic end of the hydraulic rod is rotatably connected to a limit frame, a second pressure sensor is fixedly mounted on the limit frame, the limit roller and the second pressure sensor are rotatably connected, and the second pressure sensor is used to control the hydraulic rod.

[0018] Preferably, the support and detection assembly consists of a support mechanism and a detection mechanism, the detection mechanism is located at the upper part of the limit roller, and the support mechanism is located at the lower part of the limit roller, and the support mechanism and the detection mechanism both include two first fixing rings fixedly mounted on the limit roller, a plurality of telescopic rods 1 are fixedly mounted on the two first fixing rings, a first telescopic rod is fixedly mounted on the telescopic end of each telescopic rod 1, a limiting block is fixedly mounted on the telescopic end of each first telescopic rod, a second fixing ring is slidably mounted on the limit roller, a plurality of telescopic rods 2 are fixedly mounted on the second fixing ring, the telescopic end of each telescopic rod 2 is fixedly connected to the telescopic end of the corresponding first telescopic rod, and two groups of extension structures that cooperate with the telescopic end of the corresponding telescopic rod 1 are installed on the limit frame;

[0019] A screw adjustment component is installed between the first fixing ring and the second fixing ring in the support mechanism, for adjusting the height of the second fixing ring;

[0020] An elastic component is installed between the first fixing ring and the second fixing ring in the detection mechanism, which is used to reset the second fixing ring so that the limiting block on the second fixing ring always abuts against the steel plate.

[0021] Preferably, the expansion structure includes a guide plate rotatably mounted on the limit frame, a circular hole is provided in the middle of the guide plate, which is sleeved on the limit roller, a non-circular groove is provided on the guide plate, and each telescopic end of the telescopic rod is rotatably mounted with a column that cooperates with the non-circular groove, and an orientation locking component that cooperates with the guide plate is installed on the frame.

[0022] Preferably, the orientation locking component includes a first cylinder rotatably mounted on the frame, a cylinder is rotatably mounted on the telescopic end of the first cylinder, a column sleeve matching the cylinder is fixedly mounted on the guide rail plate, and the distance between the center axis of the column sleeve and the center axis of the limiting roller is equal to the distance between the center axis of the first cylinder rotatably connected to the frame and the center axis of the hydraulic rod rotatably connected to the frame.

[0023] The present invention also provides a steel plate correction method for LNG storage tank processing, comprising the above-mentioned steel plate correction device for LNG storage tank processing, and further comprising the following steps:

[0024] S1. First, insert the end of the steel plate after welding or cutting on one side between the rotating roller and the straightening roller. The unwelded or uncut side is used as the reference side for steel plate straightening. Straighten the cut or welded side. Adjust the height of the straightening roller so that the distance between the straightening roller and the rotating roller is equal to the thickness of the steel plate. Then, adjust the height of the support block by adjusting the assembly so that the support block contacts the bottom of the steel plate to support the bottom of the steel plate.

[0025] S2. Then, the constant pressure component drives the limit frame to rotate around the frame, so that the limit rollers on the limit frame abut against both sides of the steel plate to limit the steel plate;

[0026] S3. Finally, the rotating roller is driven to rotate. The rotation of the rotating roller drives the steel plate to move, so that the steel plate moves between the rotating roller and the correction roller for correction. While moving, the second motor drives the limiting roller to rotate, which is used in conjunction with the rotating roller to push the steel plate. At the same time, the support detection component will detect the edge of the steel plate, and control the pressure of the correction roller on the steel plate according to the detection, so that the correction is more accurate.

[0027] Compared with the existing technology, the advantages of the present invention are:

[0028] 1. When the steel plate correction device is correcting the edge of the steel plate, a hydraulic rod 26 is set to drive the limit frame to rotate, so that the limit roller on the limit frame is against the edge of the steel plate, limiting the steel plate to avoid the steel plate from deflecting during the correction process, making the correction more stable and improving the correction quality.

[0029] 2. When correcting the edge of the steel plate, the steel plate correction device sets a support unit to support the steel plate that has not entered the correction unit, so as to avoid the front end of the steel plate being suspended in the air and causing the correction component to be subjected to a large torque, thereby improving the correction efficiency. In addition, the support unit can automatically adjust the support range according to the width of the steel plate, and has a wider range of applications.

[0030] 3. When correcting the edge of the steel plate, the steel plate correction device provides auxiliary support for the steel plate by setting up a support mechanism to improve the stability of the steel plate during movement. At the same time, it cooperates with the detection mechanism to detect the degree of deformation of the steel plate. The pressure of the correction roller on the steel plate is controlled by the second sensor to improve the accuracy of the correction. In addition, the position of the limit block in the detection mechanism can be changed by the expansion structure, so that the displacement of the limit block for detection on the steel plate is enlarged, thereby improving the detection accuracy.

[0031] To sum up, when correcting the edge of the steel plate, the present invention can not only limit the two sides of the steel plate to keep the steel plate stable and horizontal when entering the correction unit for correction, but also use the support unit to support the steel plate, and automatically change the support position according to the shape of the steel plate to ensure that the bottom height of the steel plate remains constant when entering the correction unit for correction, thereby improving the correction quality. In addition, the degree of deformation of the steel plate edge can be detected before detection, and the steel plate can be subjected to different degrees of pressure correction according to the degree of deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0033] Figure 1 This is a schematic structural diagram of a steel plate straightening device for LNG storage tank processing proposed by the present invention;

[0034] Figure 2 for Figure 1 Detailed schematic diagram of the structure after removing the steel plate and rotating it at a certain angle;

[0035] Figure 3 for Figure 2 Detailed schematic diagram of the structure of the medium straightening unit;

[0036] Figure 4 for Figure 3 A detailed diagram of the enlarged structure of part A;

[0037] Figure 5 for Figure 2 Enlarged structural schematic detail diagram of the middle support unit;

[0038] Figure 6 for Figure 5 Detailed schematic diagram of the structure after rotation at a certain angle;

[0039] Figure 7 for Figure 2 Detailed schematic diagram of the enlarged structure of the middle limit unit;

[0040] Figure 8 for Figure 7 Detailed schematic drawing of the plan structure along one of the angles;

[0041] Figure 9 for Figure 7 A detailed structural diagram after removing the frame, hydraulic rod and first cylinder and rotating them at a certain angle;

[0042] Figure 10 for Figure 9 Detailed diagram of the structure after removing the limit frame and rotating it to a certain angle;

[0043] Figure 11 for Figure 10 Detailed schematic drawing of the plan structure along one of the angles;

[0044] Figure 12 for Figure 10 Detailed schematic diagram of the enlarged structure of the middle support detection component.

[0045] In the figure: 1 steel plate, 2 straightening unit, 3 supporting unit, 4 limiting unit, 5 frame, 6 rotating roller, 7 straightening roller, 8 straightening hydraulic cylinder, 9 first motor, 10 first gear, 11 second gear, 12 third gear, 13 reducer, 14 supporting frame, 15 spacing adjustment plate, 16 first electric push rod, 17 cross frame, 18 limiting ring, 19 sliding rod, 20 supporting block, 21 cross bar, 22 second electric push rod, 23 sliding rod, 24 sliding sleeve, 25 limiting frame, 26 hydraulic rod, 27 guide plate, 28 first cylinder, 29 second motor, 30 second cylinder, 31 limiting roller, 32 support detection component, 33 first fixing ring, 34 telescopic rod 1, 35 first telescopic rod, 36 limiting block, 37 telescopic rod 2, 38 second fixing ring, 39 screw adjustment component, 40 elastic component. DETAILED DESCRIPTION

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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.

[0047] Example 1: Reference Figure 1-Figure 2 A steel plate straightening device for LNG storage tank processing includes a steel plate 1 and a frame 5, and also includes a straightening unit 2, a supporting unit 3 and a limiting unit 4 installed on the frame 5.

[0048] The correction unit 2 is used to correct the steel plate 1, and the support unit 3 is used to support the part of the steel plate 1 that has not entered the correction unit 2, so that the steel plate 1 can maintain stable movement with a constant bottom height; the limiting unit 4 is used to limit the steel plate 1 to the left and right to prevent the steel plate 1 from shifting. At the same time, it can also detect the degree of deformation of the edge of the steel plate 1 and adjust the pressure and correct it according to the detection.

[0049] Example 2: This example differs from the example 1 in that: Figure 3-Figure 4 The straightening unit 2 includes two rotating rollers 6 rotatably mounted on a frame 5 and a plurality of straightening rollers 7 that can be raised and lowered. The rotating rollers 6 drive the steel plate 1 to move, and the straightening rollers 7 straighten the moving steel plate 1. The straightening unit 2 also includes a driving component that cooperates with the rotating rollers 6.

[0050] Two correction hydraulic cylinders 8 are fixedly installed on the frame 5. A plate that is slidably connected to the frame 5 is fixedly installed at the telescopic end of the two correction hydraulic cylinders 8. Each correction roller 7 is rotationally connected to the two plates. A first pressure sensor is installed between the telescopic end of the correction hydraulic cylinder 8 and the plate.

[0051] When the steel plate 1 moves between the rotating roller 6 and the correcting roller 7, the edge of the steel plate 1 is deformed, and the distance between the rotating roller 6 and the correcting roller 7 is locked and fixed by the correcting hydraulic cylinder 8, so the edge deformation will be corrected under the action of extrusion. During correction, the rotating roller 6 will rotate under the action of the friction between it and the steel plate 1.

[0052] During the correction process, the first pressure sensor can be used to control the pressing force of the correction roller 7 on the steel plate 1, so as to correct steel plates 1 of different thicknesses and hardnesses, thereby expanding the scope of application.

[0053] The driving assembly includes a first motor 9 fixedly mounted on the frame 5, the driving end of the first motor 9 is connected to a reducer 13, the driving end of the reducer 13 is fixedly mounted with a second gear 11, each of the two rotating rollers 6 is fixedly mounted with a first gear 10, and a third gear 12 is rotatably mounted on the frame 5 and meshes with the two first gears 10, and the second gear 11 is meshed with one of the first gears 10.

[0054] After the driving end of the first motor 9 is decelerated by the reducer 13, it will drive the second gear 11 to rotate. The rotation of the second gear 11 will drive the first gear 10 meshing with it to rotate. The rotation of the first gear 10 will drive another first gear 10 to rotate through the third gear 12, thereby driving the two rotating rollers 6 to rotate in the same direction at the same time, thereby driving the steel plate 1 to move between the rotating roller 6 and the straightening roller 7.

[0055] The reducer 13 is used to reduce the rotation speed of the driving end of the first motor 9. The low rotation speed has the advantage of low vibration amplitude, which makes the rotating roller 6 rotate more stably and improves the correction quality. At the same time, the reducer 13 has the function of increasing the torque, which increases the driving torque of the first motor 9 and makes it easier to drive the steel plate 1 to move.

[0056] Example 3: This example differs from the technical solution of Example 2 in that: Figure 2 、 Figure 5-Figure 6 The supporting unit 3 includes two supporting frames 14 fixedly mounted on the frame 5 and a plurality of supporting blocks 20 mounted on the corresponding supporting frames 14 for supporting the steel plate 1. An adjusting component is installed between the two supporting frames 14 and the corresponding plurality of supporting blocks 20.

[0057] There are two supporting units 3 , which are located on both sides of the frame 5 . The two supporting units 3 can be operated and adjusted independently to ensure that the moving height of the steel plate 1 is stable.

[0058] The adjustment assembly includes a plurality of sliding sleeves 24 slidably mounted on the support frame 14 via a sliding rod 23, and a range adjustment mechanism is mounted on the support frame 14 to cooperate with the plurality of sliding sleeves 24;

[0059] The range adjustment mechanism includes a spacing adjustment plate 15 slidably mounted on the support frame 14, and a plurality of guide grooves are provided on the spacing adjustment plate 15. A rotating column that cooperates with the corresponding guide groove is rotatably mounted on each sliding sleeve 24. A first electric push rod 16 is fixedly mounted on the spacing adjustment plate 15, and the telescopic end of the first electric push rod 16 is fixedly connected to the support frame 14.

[0060] In order to reduce the probability of scratches on the steel plate 1, multiple support blocks 20 are required to support the steel plate 1 at the same time (the more support points there are, the weaker the support strength of a single support point. Therefore, if all support blocks 20 support the steel plate 1 at the same time, the steel plate 1 has the most support points, and the pressure between each support block 20 and the steel plate 1 is the smallest). Different steel plates 1 have different widths, so in order to meet the needs of steel plates 1 of different widths, the horizontal position of the support block 20 needs to be adjusted. The specific operation is as follows:

[0061] Start the first electric push rod 16, which drives the spacing adjustment plate 15 to move on the support frame 14. The movement of the spacing adjustment plate 15 will drive the rotating column to move through the guide groove, so that all the sliding sleeves 24 can move synchronously on the sliding rod 23, thereby driving the support block 20 to move through the cross frame 17 and the sliding rod 19. The guide groove on the spacing adjustment plate 15 can be customized according to needs. It can be customized to make all the sliding sleeves 24 move synchronously and equidistantly, or it can be customized to move synchronously and unequally, so as to ensure that all the support blocks 20 are against the bottom of the steel plate 1.

[0062] A cross frame 17 is fixedly mounted on each sliding sleeve 24, a limiting ring 18 is fixedly mounted on each cross frame 17, a sliding rod 19 is slidably mounted on each limiting ring 18, and each sliding rod 19 is fixedly connected to the corresponding support block 20. A two-way telescopic plate is fixedly mounted on the two limiting rings 18 in the middle, a second electric push rod 22 is fixedly mounted in the middle part of the two-way telescopic plate, a cross bar 21 is fixedly mounted on multiple sliding rods 19, and the telescopic end of the second electric push rod 22 is fixedly connected to the cross bar 21.

[0063] The telescopic end of the second electric push rod 22 drives the cross bar 21 to rise and fall, thereby driving the multiple slide bars 19 to slide on the limit ring 18, thereby changing the height of the support block 20 on the top of the slide bar 19, so that the support block 20 is against the bottom of the steel plate 1 to support the steel plate 1 (a sensor is installed on the second electric push rod 22, which can adjust the height of the support block 20 in real time according to the bottom position of the steel plate 1);

[0064] A ball bearing is rotatably mounted on the end of the support block 20 to reduce the friction between the support block 20 and the steel plate 1, so that the steel plate 1 slides more smoothly on the support block 20 and reduces the probability of scratches on the steel plate 1.

[0065] Example 4: This example differs from the technical solution of Example 3 in that: Figure 1-Figure 2 、 Figure 7-12 , the limiting unit 4 has two groups, which are respectively located on both sides of the frame 5, including two limiting frames 25 installed on the frame 5, and a limiting roller 31 that cooperates with the steel plate 1 is rotatably installed on the two limiting frames 25. The limiting roller 31 is wrapped with a rubber ring on the outside, which not only increases the friction between the steel plate 1 and provides a greater moving thrust, but also protects the edge of the steel plate 1 to prevent the deformation of the edge of the steel plate 1 from further deepening;

[0066] A second motor 29 that cooperates with a limiting roller 31 is fixedly mounted on the limiting frame 25. The two limiting rollers 31 are used to limit the steel plate 1. A constant pressure component that cooperates with the limiting frame 25 is mounted on the frame 5.

[0067] The limit frame 25 is retractable, and the limit roller 31 is installed at its retractable end. A second cylinder 30 is fixedly installed on the limit frame 25 for retracting and extending the limit frame 25 and changing the position of the limit roller 31, which is suitable for clamping and limiting steel plates 1 of different widths.

[0068] The second motor 29 will drive the limiting roller 31 to rotate. The linear rotation direction of the contact part between the limiting roller 31 and the steel plate 1 is the same as the moving direction of the steel plate 1. It not only has the function of limiting the two sides of the steel plate 1, but also can provide a certain thrust for the movement of the steel plate 1. Cooperating with the rotating roller 6, it can make the steel plate 1 move more stably and smoothly.

[0069] The constant pressure component includes a hydraulic rod 26 rotatably mounted on the frame 5. The telescopic end of the hydraulic rod 26 is rotatably connected to the limit frame 25. A second pressure sensor is fixedly mounted on the limit frame 25. The limit roller 31 is rotatably connected to the second pressure sensor. The second pressure sensor is used to control the hydraulic rod 26.

[0070] The movement of the telescopic end of the hydraulic rod 26 will drive the limit frame 25 to rotate around the axis connected to the frame 5, thereby changing the lateral position of the limit roller 31 on the limit frame 25, and also changing the longitudinal position of the limit roller 31. The change in the lateral position can clamp and lock the steel plate 1 at constant pressure, thereby improving the stability of the movement of the steel plate 1.

[0071] The second pressure sensor will sense the pressure between the limiting roller 31 and the steel plate 1, and then control the hydraulic rod 26 to change its length, so as to effectively avoid the situation where the edge deformation of the steel plate 1 is aggravated due to excessive pressure, and at the same time avoid the situation where the steel plate 1 is slightly offset due to insufficient pressure, thereby improving the stability of the correction of the steel plate 1.

[0072] A support detection assembly 32 is installed on the limiting roller 31;

[0073] The support and detection assembly 32 consists of a support mechanism and a detection mechanism. The detection mechanism is located at the upper part of the limiting roller 31, and the support mechanism is located at the lower part of the limiting roller 31. The support mechanism and the detection mechanism both include two first fixed rings 33 fixedly mounted on the limiting roller 31, and a plurality of telescopic rods 34 are fixedly mounted on the two first fixed rings 33. A first telescopic rod 35 is fixedly mounted on the telescopic end of each telescopic rod 34, and a limiting block 36 is fixedly mounted on the telescopic end of each first telescopic rod 35. A second fixed ring 38 is slidably mounted on the limiting roller 31, and a plurality of telescopic rods 2 37 are fixedly mounted on the second fixed ring 38. The telescopic end of each telescopic rod 2 37 is fixedly connected to the telescopic end of the corresponding first telescopic rod 35. Two groups of extension structures that cooperate with the telescopic ends of the corresponding telescopic rods 34 are installed on the limiting frame 25;

[0074] There are two second fixing rings 38 in each of the two groups of limiter units 4. A plurality of laser receivers are fixedly mounted on the two second fixing rings 38 in one group of limiter units 4, and a plurality of laser emitters are fixedly mounted on the two second fixing rings 38 in the other group of limiter units 4. When the support mechanism is adjusted, the height of the two groups of limiter blocks 36 on both sides is controlled by calibrating the laser and the laser receiver to ensure that the heights of the two groups of limiter blocks 36 on both sides are consistent (the limiter blocks 36 here are the limiter blocks 36 located in the support mechanism);

[0075] The function of the laser transmitter and the laser receiver in the detection mechanism is to judge the degree of edge deformation of the steel plate 1 by utilizing the change of the laser on the laser receiver during detection.

[0076] When the limiting roller 31 rotates, it will drive the first fixing ring 33 and the second fixing ring 38 to rotate, thereby driving multiple limiting blocks 36 to rotate around the limiting roller 31, and each limiting block 36 will pass through the upper surface or lower surface of the steel plate 1. The limiting block 36 located on the upper surface of the steel plate 1 is used to detect the degree of deformation of the edge of the steel plate 1 (when the steel plate 1 is deformed, the limiting block 36 located on the upper part of the steel plate 1 will move along the deformed surface of the steel plate 1, and the movement of the limiting block 36 will drive the second fixing ring 38 to move through the telescopic rod 2 37, thereby driving the laser emitter on the second fixing ring 38 to move, while the other end of the steel plate 1 is not cut or welded, so the other end of the steel plate 1 is flat, and the position of the laser receiver located at the other end remains unchanged, so the position of the laser emitted by the laser emitter received by the laser receiver is different. A controller is installed in the laser receiver to control the correction). The limiting block 36 located on the lower surface of the steel plate 1 is used to support the lower part of the steel plate 1 and is used in conjunction with the supporting unit 3;

[0077] The laser receiver is flat and the laser emitter is a point-shooting device. Once the laser emitter changes its position, the position of the laser emitted by the laser emitter on the laser receiver changes. The greater the position change, the greater the deformation. The controller will control and correct the lifting distance of the hydraulic cylinder 8 according to the distance of the position change.

[0078] When the deformation of the steel plate 1 is larger, the higher the correction hydraulic cylinder 8 is lifted, and it is pressed from top to bottom for preliminary correction. The larger the deformation, the greater the required pressing force, so different pressure corrections are performed. After pressing, it is corrected by reciprocating movement between the rotating roller 6 and the correction roller 7. The purpose of pressing for preliminary correction is to reduce the deformation of the steel plate 1 and avoid distortion of the deformation position caused by excessive deformation, which will not only make correction impossible but also cause distortion.

[0079] The expansion structure includes a guide plate 27 rotatably mounted on the limit frame 25. A circular hole is provided in the middle of the guide plate 27, which is sleeved on the limit roller 31. A non-circular groove is provided on the guide plate 27. Each telescopic rod 34 is rotatably mounted at its telescopic end with a column that cooperates with the non-circular groove. An orientation locking component that cooperates with the guide plate 27 is installed on the frame 5.

[0080] As the limit stop 36 rotates, the telescopic rod 34 also rotates. Due to the non-circular groove on the guide plate 27 and the telescopic end column of the telescopic rod 34, the telescopic end of the telescopic rod 34 will move during the rotation of the telescopic rod 34, and the corresponding limit stop 36 will be pushed away from the original circular running track. The purpose of this design is to increase the travel of the limit stop 36 in contact with the steel plate 1 on the steel plate 1. The larger the travel, the more accurate the degree of edge deformation of the steel plate 1 can be detected.

[0081] refer to Figure 7-Figure 8 The orientation locking component includes a first cylinder 28 rotatably mounted on the frame 5, a cylinder is rotatably mounted on the telescopic end of the first cylinder 28, and a column sleeve matching the cylinder is fixedly mounted on the guide plate 27. The distance between the center axis of the column sleeve and the center axis of the limiting roller 31 is equal to the distance between the center axis of the first cylinder 28 rotatably connected to the frame 5 and the center axis of the hydraulic rod 26 rotatably connected to the frame 5.

[0082] As the limit frame 25 rotates, the guide plate 27 will be driven to rotate around the axis of rotation connection between the limit frame 25 and the frame 5. At this time, the angle of the guide plate 27 will change. In order to fix the angle of the guide plate 27 and make the protruding position of the guide plate 27 always remain perpendicular to the side of the steel plate 1, the rotation connection point of the limit frame 25 and the frame 5 is set to B, the rotation connection point of the first cylinder 28 and the frame 5 is set to C, the center point of the column sleeve is set to D, and the center point of the limit roller 31 is set to E. The figure surrounded by BCDE is a parallelogram. The total length of the first cylinder 28 (after extension) is the same as the total length of the limit frame 25 after extension. In this way, it can be ensured that the protruding part of the guide plate 27 is always perpendicular to the side of the steel plate 1.

[0083] A screw adjustment component 39 is installed between the first fixing ring 33 and the second fixing ring 38 in the support mechanism to adjust the height of the second fixing ring 38;

[0084] The screw adjustment component 39 is a common height adjustment structure, which can be adjusted electrically or manually. Its specific structure and specific adjustment method are not further elaborated here. Its function is to adjust the distance between the first fixing ring 33 and the second fixing ring 38.

[0085] An elastic component 40 is installed between the first fixing ring 33 and the second fixing ring 38 in the detection mechanism, which is used to reset the second fixing ring 38 so that the limiting block 36 on the second fixing ring 38 always abuts against the steel plate 1.

[0086] The elastic component 40 is an elastic return spring. Under the action of the elastic component 40, the limit block 36 on the detection mechanism will always be in contact with the upper surface of the steel plate 1 (a ball that cooperates with the steel plate 1 is rotatably installed at the end of the limit block 36 to reduce the friction between the steel plate 1).

[0087] The specific operating steps of this device are as follows:

[0088] First, insert the end of the steel plate 1 after welding or cutting on one side between the rotating roller 6 and the straightening roller 7, and use the unwelded or uncut side as the reference side for steel plate straightening. Straighten the cut or welded side, and adjust the height of the straightening roller 7 by the straightening hydraulic cylinder 8 so that the distance between the straightening roller 7 and the rotating roller 6 is equal to the thickness of the steel plate 1. Then, adjust the height of the support block 20 by adjusting the assembly so that the support block 20 is against the bottom of the steel plate 1, and adjust the support range of multiple support blocks 20 by adjusting the range adjustment mechanism in the assembly to ensure that all support blocks 20 are located below the steel plate 1 to support the bottom of the steel plate 1.

[0089] Then, the hydraulic rod 26 is started, and the telescopic end moves to drive the limit frame 25 to rotate around the frame 5, so that the limit rollers 31 on the limit frame 25 abut against the two sides of the steel plate 1. If the width of the steel plate 1 is short, the second cylinder 30 needs to be started at this time. The second cylinder 30 will adjust the length of the limit frame 25 to ensure that the length of the limit frame 25 is greater than the distance from the edge of the steel plate 1 to the edge of the frame 5, so that the limit rollers 31 on the limit frame 25 abut against the side of the steel plate 1, thereby limiting the steel plate 1.

[0090] Finally, the rotating roller 6 is driven to rotate, and the rotation of the rotating roller 6 drives the steel plate 1 to move, so that the steel plate 1 moves between the rotating roller 6 and the correction roller 7 for correction. While moving, the second motor 29 drives the limiting roller 31 to rotate, and is used in conjunction with the rotating roller 6 to push the steel plate 1. At the same time, the support detection component 32 will detect the edge of the steel plate 1, and control the pressure of the correction roller 7 on the steel plate 1 according to the detection, so that the correction is more accurate.

[0091] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A steel plate straightening device for LNG storage tank processing, comprising a steel plate (1) and a frame (5), characterized in that: It also includes a correction unit (2), a support unit (3) and a limit unit (4) installed on a frame (5); The straightening unit (2) includes two rotating rollers (6) rotatably mounted on a frame (5) and a plurality of straightening rollers (7) that can be raised and lowered. The rotating rollers (6) drive the steel plate (1) to move, and the straightening rollers (7) straighten the moving steel plate (1). The straightening unit (2) also includes a driving assembly that cooperates with the rotating rollers (6). The support unit (3) comprises two support frames (14) fixedly mounted on the frame (5) and a plurality of support blocks (20) mounted on the corresponding support frames (14), and is used to support the steel plate (1); an adjustment assembly is installed between the two support frames (14) and the corresponding plurality of support blocks (20); There are two groups of limiter units (4), which are respectively located on both sides of the frame (5), and include two limiter frames (25) installed on the frame (5), and a limiter roller (31) that matches the steel plate (1) is rotatably installed on each of the two limiter frames (25). A second motor (29) that matches the limiter roller (31) is fixedly installed on the limiter frame (25), and the steel plate (1) is limited by the two limiter rollers (31). A constant pressure component that matches the limiter frame (25) is installed on the frame (5), and a support detection component (32) is installed on the limiter roller (31); The support detection assembly (32) is composed of a support mechanism and a detection mechanism, the detection mechanism is located at the upper part of the limiting roller (31), and the support mechanism is located at the lower part of the limiting roller (31), the support mechanism and the detection mechanism both include two first fixed rings (33) fixedly mounted on the limiting roller (31), a plurality of telescopic rods (34) are fixedly mounted on the two first fixed rings (33), a first telescopic rod (35) is fixedly mounted on the telescopic end of each telescopic rod (34), a limiting stop (36) is fixedly mounted on the telescopic end of each first telescopic rod (35), a second fixed ring (38) is slidably mounted on the limiting roller (31), a plurality of telescopic rods (37) are fixedly mounted on the second fixed ring (38), a telescopic end of each telescopic rod (37) is fixedly connected to the telescopic end of the corresponding first telescopic rod (35), and two groups of expansion structures that match the telescopic end of the corresponding telescopic rod (34) are installed on the limiting frame (25); A screw adjustment component (39) is installed between the first fixing ring (33) and the second fixing ring (38) in the support mechanism, and is used to adjust the height of the second fixing ring (38); An elastic component (40) is installed between the first fixing ring (33) and the second fixing ring (38) in the detection mechanism, and is used to reset the second fixing ring (38) so that the limiting block (36) on the second fixing ring (38) always abuts against the steel plate (1); The expansion structure includes a guide plate (27) rotatably mounted on the limit frame (25), a circular hole is provided in the middle of the guide plate (27), which is sleeved on the limit roller (31), a non-circular groove is provided on the guide plate (27), and a column is rotatably mounted on the telescopic end of each telescopic rod (34) to match the non-circular groove, and an orientation locking component matching the guide plate (27) is installed on the frame (5); The orientation locking component includes a first cylinder (28) rotatably mounted on the frame (5), a cylinder being rotatably mounted on the telescopic end of the first cylinder (28), a column sleeve matching the cylinder being fixedly mounted on the guide rail plate (27), and a spacing between a central axis of the column sleeve and a central axis of the limiting roller (31) being equal to a spacing between a central axis of the first cylinder (28) rotatably connected to the frame (5) and a central axis of the hydraulic rod (26) rotatably connected to the frame (5).

2. The steel plate straightening device for LNG tank processing according to claim 1, characterized in that: Two correction hydraulic cylinders (8) are fixedly mounted on the frame (5), and a plate slidably connected to the frame (5) is fixedly mounted on the telescopic ends of the two correction hydraulic cylinders (8). Each correction roller (7) is rotationally connected to the two plates, and a first pressure sensor is mounted between the telescopic ends of the correction hydraulic cylinders (8) and the plate.

3. The steel plate straightening device for LNG tank processing according to claim 1, characterized in that: The driving assembly comprises a first motor (9) fixedly mounted on a frame (5); a reducer (13) is connected to a driving end of the first motor (9); a second gear (11) is fixedly mounted on a driving end of the reducer (13); a first gear (10) is fixedly mounted on each of the two rotating rollers (6); a third gear (12) meshing with both of the first gears (10) is rotatably mounted on the frame (5); and the second gear (11) meshes with one of the first gears (10).

4. The steel plate straightening device for LNG tank processing according to claim 1, characterized in that: The adjustment assembly includes a plurality of sliding sleeves (24) slidably mounted on a support frame (14) via a sliding rod (23), a range adjustment mechanism matched with the plurality of sliding sleeves (24) is mounted on the support frame (14), a cross frame (17) is fixedly mounted on each sliding sleeve (24), a limiting ring (18) is fixedly mounted on each cross frame (17), a sliding rod (19) is slidably mounted on each limiting ring (18), and each sliding rod (19) is fixedly connected to the corresponding support block (20), wherein a bidirectional telescopic plate is fixedly mounted on two of the middle limiting rings (18), a second electric push rod (22) is fixedly mounted on the middle portion of the bidirectional telescopic plate, a cross rod (21) is fixedly mounted on the plurality of sliding rods (19), and the telescopic end of the second electric push rod (22) is fixedly connected to the cross rod (21).

5. The steel plate straightening device for LNG tank processing according to claim 4, characterized in that: The range adjustment mechanism includes a spacing adjustment plate (15) slidably mounted on a support frame (14), a plurality of guide grooves being provided on the spacing adjustment plate (15), a rotating column which matches the corresponding guide groove being rotatably mounted on each of the sliding sleeves (24), a first electric push rod (16) being fixedly mounted on the spacing adjustment plate (15), and a telescopic end of the first electric push rod (16) being fixedly connected to the support frame (14).

6. The steel plate straightening device for LNG tank processing according to claim 1, characterized in that: The constant pressure assembly includes a hydraulic rod (26) rotatably mounted on a frame (5), a telescopic end of the hydraulic rod (26) being rotatably connected to a limiting frame (25), a second pressure sensor being fixedly mounted on the limiting frame (25), and a limiting roller (31) being rotatably connected to the second pressure sensor, the second pressure sensor being used to control the hydraulic rod (26).

7. A steel plate straightening method for LNG storage tank processing, used in the steel plate straightening device for LNG storage tank processing according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. First, insert the end of the steel plate (1) after welding or cutting on one side between the rotating roller (6) and the correction roller (7). The side that is not welded or cut is used as the reference side for steel plate correction. Correct the cut or welded side. Adjust the height of the correction roller (7) so that the distance between the correction roller (7) and the rotating roller (6) is equal to the thickness of the steel plate (1). Then, adjust the height of the support block (20) by adjusting the assembly so that the support block (20) is against the bottom of the steel plate (1) to support the bottom of the steel plate (1). S2, then the limiting frame (25) is driven to rotate around the frame (5) through the constant pressure component, so that the limiting rollers (31) on the limiting frame (25) are pressed against both sides of the steel plate (1), thereby limiting the steel plate (1); S3, finally driving the rotating roller (6) to rotate, the rotating roller (6) drives the steel plate (1) to move, so that the steel plate (1) moves between the rotating roller (6) and the correction roller (7) for correction. While moving, the second motor (29) drives the limiting roller (31) to rotate, and cooperates with the rotating roller (6) to push the steel plate (1). At the same time, the support detection component (32) will detect the edge of the steel plate (1), and control the pressure of the correction roller (7) on the steel plate (1) according to the detection, so that the correction is more accurate.

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