CN112427514B - Large-caliber thick-wall medium-frequency heating bending elbow pipe shape online control system and method - Google Patents
Large-caliber thick-wall medium-frequency heating bending elbow pipe shape online control system and method Download PDFInfo
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- CN112427514B CN112427514B CN202011179291.7A CN202011179291A CN112427514B CN 112427514 B CN112427514 B CN 112427514B CN 202011179291 A CN202011179291 A CN 202011179291A CN 112427514 B CN112427514 B CN 112427514B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/16—Auxiliary equipment, e.g. for heating or cooling of bends
- B21D7/162—Heating equipment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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Abstract
The invention belongs to the technical field of manufacturing of high-pressure oil and gas conveying equipment, and particularly relates to an on-line control system and method for a large-diameter thick-wall medium-frequency heating simmering elbow pipe, aiming at solving the problem that the roundness of a pipe end and a pipe body of a large-diameter thick-wall medium-frequency heating simmering elbow does not reach the standard after being simmered; the system comprises a front roller of the intermediate-frequency heating hot pipe bending machine set, a heating coil, a distance measuring device, a tubular adjusting device and a master control center; the distance measuring device arranged on the periphery of the pipe body to be roasted is used for detecting the distance information from the outer surface of the pipe body to the distance measuring device; the master control center obtains the actual section shape of the outer surface of the pipe body through least square fitting operation based on the distance information, and obtains the diameter deviation of the outer surface of the pipe body to be stewed through comparing the actual section shape with the theoretical section shape; the master control center controls the tubular adjusting device to perform top pressure adjustment on the shape of the outer surface of the corresponding tube body based on the diameter deviation; the invention can realize the on-line control and adjustment of the large-caliber thick-wall medium-frequency heating bending elbow pipe shape.
Description
Technical Field
The invention belongs to the technical field of high-pressure oil and gas conveying equipment manufacturing, and particularly relates to a large-caliber thick-wall medium-frequency heating bending elbow pipe-shaped online control system and method.
Background
With the development of national economy and the adjustment of energy consumption structures, the demand of natural gas in China is rapidly increased in recent years; the oil and gas pipeline is used as one of nine infrastructures and one of six traffic modes to lead to the continuous and rapid development of strategic period; according to the Medium-and-Long-term oil and gas pipe network planning issued by the State development and improvement Commission and energy agency, the national oil and gas pipe network scale reaches 24 multiplied by 10 by 2025 4 km; in the whole view, the natural gas production area or the import channel in China is far away from the region with vigorous natural gas demand, and large-scale long-distance transportation is needed; to achieve better efficiency, pipeline construction is moving to larger scale, and single pipe delivery capacity is improved by using higher pressure and larger diameter pipelines.
The construction of natural gas long-distance pipelines in China in a period of the future is mainly characterized by large output, the single pipe output of the constructed middle-east and Russian line can meet the 380-hundred million square/year conveying requirement, the steel grade specification of a steel pipe for pipeline main line construction is X80 OD1422mm, the wall thickness is 21.4mm-38.5mm, and the requirements on conveying equipment are basically high steel grade, large caliber and large wall thickness.
In recent years, failure accidents of high-pressure oil and gas transmission pipelines occur frequently, so that the safety control of the pipeline in the construction period and the operation period is upgraded in China. A main reason of the failure accident of the high-pressure oil and gas conveying pipeline is the quality defect of the circumferential weld, in order to reduce the quality risk of the circumferential weld on site, the pipeline construction puts higher requirements on the circumference and the out-of-roundness of pipeline elements such as steel pipes, hot bends and the like, and requires a narrower intensity change range, so that the circumferential weld assembly stress on site is controlled, the over-strong matching of a circumferential weld joint is realized, and meanwhile, conditions are provided for full-automatic welding adopted for the circumferential weld.
Because the steel pipe is continuously heated and roasted by adopting the medium-frequency induction heating principle and is synchronously subjected to on-line continuous quenching treatment, the application of a common automation device is limited by the complex medium-frequency induction heating effect, high-temperature heat radiation, medium-frequency electromagnetic interference and high-temperature water vapor environment on site. At present, the control means of bending a large-diameter thick-wall intermediate frequency heating bend are all in an off-line mode, firstly, the macroscopic size of a main pipe (straight pipe) is measured in the manufacturing process of the main pipe of the bend, and the main pipe with the overproof pipe shape is rounded in an off-line rounding machine; secondly, after the hot bending bend is finished, a pipe end rounding machine or other devices are adopted to round the pipe end; the two modes are difficult to ensure the overall precision of the macroscopic size of the main pipe and the bent pipe, particularly the uniformity of the overall size, the unstable performance caused by uneven heating is easy to cause, and the product quality is seriously influenced; the technique and device for on-line pipe shape control in the hot bending process are blank.
Disclosure of Invention
In order to solve the problems in the prior art, namely to solve the problem that the pipe end of the large-caliber thick-wall medium-frequency heating simmering elbow pipe and the pipe body do not reach the standard after being simmered, the invention provides an on-line control system and method for the large-caliber thick-wall medium-frequency heating simmering elbow pipe.
The invention provides a large-caliber thick-wall medium-frequency heating simmering elbow pipe shape online control system, which comprises a medium-frequency heating hot elbow unit front roller, a heating coil, a distance measuring device, a pipe shape adjusting device and a master control center, wherein the distance measuring device and the pipe shape adjusting device are arranged between the medium-frequency heating hot elbow unit front roller and the heating coil, and are sequentially arranged along the advancing direction of a pipe body to be simmered; the distance measuring device and the tubular adjusting device are in communication connection with the master control center;
the distance measuring device is arranged on the periphery of the pipe body to be roasted to detect the distance between the outer surface of the pipe body to be roasted and a measuring reference;
the master control center carries out online analysis on the shape of the outer surface of the pipe body to be stewed based on the distance information detected by the distance measuring device and formulates related measures; the on-line analysis comprises the steps of obtaining the actual section shape of the outer surface of the pipe body to be roasted by combining the least square fitting operation, and obtaining the diameter deviation of the outer surface of the pipe body to be roasted by comparing the actual section shape with the stored theoretical section shape; the related measures comprise that the master control center controls the tubular adjusting device to perform top pressure adjustment on the shape of the outer surface of the tube body at the corresponding position based on the diameter deviation.
In some preferred embodiments, the distance measuring device comprises a distance measuring part and a supporting device, and the distance measuring part is arranged on the periphery of the pipe body to be heated through the supporting device; the periphery of the distance measuring part is provided with a protective cover made of a metal material which does not generate an electromagnetic induction effect, the inner wall of the protective cover is provided with a disc-shaped water cooling pipeline, and compressed air is introduced into an inner cavity of the protective cover to keep positive pressure so as to prevent high-temperature water vapor from entering; the supporting device is made of a metal material which does not generate an electromagnetic induction effect;
the range finding part is provided with a plurality ofly, and is a plurality of range finding part array sets up, and is a plurality of the centre of a circle of the fitting circle that the range finding part constitutes sets up unanimously with the fitting centre of a circle of treating the hot water pipe body.
In some preferred embodiments, the tubular adjusting device comprises a pressing mechanism, a pressing mechanism driving device and a carrying device, and the pressing mechanism is arranged on the periphery of the pipe body to be hot-stewed through the carrying device; the top pressing mechanism can be close to or far away from the pipe body to be roasted under the control of the top pressing mechanism driving device;
the plurality of jacking mechanisms are arranged in an array manner and correspond to the plurality of distance measuring components one by one; the top pressing mechanism driving devices are arranged in a plurality, and the top pressing mechanism driving devices and the top pressing mechanisms are arranged in a one-to-one correspondence mode.
In some preferred embodiments, the ranging component is a laser ranging sensor;
the laser range sensor is characterized in that a protection device is arranged on the peripheral side of the laser range sensor, the protection device is made of a metal material which does not generate an electromagnetic induction effect, a disc-shaped water cooling pipeline is arranged on the inner wall, compressed air is introduced into an inner cavity to keep positive pressure, high-temperature water vapor is prevented from entering the inner cavity, and the laser range sensor is protected from high temperature, high-temperature radiation, water vapor and/or strong electromagnetic interference.
In some preferred embodiments, the distance measuring device comprises a distance measuring part and a supporting device, and the distance measuring part is arranged on the periphery of the pipe body to be heated through the supporting device;
the distance measuring part comprises a first distance measuring sensor, a second distance measuring sensor, a third distance measuring sensor and a fourth distance measuring sensor, the first distance measuring sensor, the second distance measuring sensor, the third distance measuring sensor and the fourth distance measuring sensor are respectively arranged on the upper side, the lower side, the left side and the right side of the pipe body to be roasted, and the centers of the first distance measuring sensor, the second distance measuring sensor, the third distance measuring sensor and the fourth distance measuring sensor are consistent with the center of the pipe body to be roasted; the first distance measuring sensor and the second distance measuring sensor are symmetrically arranged relative to the center of the pipe body to be roasted; the third distance measuring sensor and the fourth distance measuring sensor are symmetrically arranged relative to the center of the pipe body to be roasted; the first distance measuring sensor and the second distance measuring sensor are used for adjusting the longitudinal shape of the pipe to be roasted, and the third distance measuring sensor and the fourth distance measuring sensor are used for adjusting the transverse shape of the pipe to be roasted.
In some preferred embodiments, the supporting device comprises a frame, a driving device and a rotating device, wherein the frame is of an annular structure;
the rotating device is arranged in the annular structure, the first distance measuring sensor, the second distance measuring sensor, the third distance measuring sensor and the fourth distance measuring sensor are fixedly arranged in the rotating device, and the first distance measuring sensor, the second distance measuring sensor, the third distance measuring sensor and the fourth distance measuring sensor are all arranged perpendicular to the pipe body to be heated; the rotating device can drive the first distance measuring sensor, the second distance measuring sensor, the third distance measuring sensor and the fourth distance measuring sensor to rotate clockwise or anticlockwise under the driving of the rotating device.
In some preferred embodiments, the tubular adjusting device comprises a bearing device, a jacking mechanism driving device, a jacking mechanism rotating device and a jacking mechanism rotating driving device; the bearing device and the jacking mechanism rotating device are both of annular structures, and the jacking mechanism rotating device and the bearing device are arranged concentrically; the top pressing mechanism rotating device can rotate under the driving of the top pressing mechanism rotating driving device to move to a corresponding position to be adjusted on the outer surface of the pipe body to be roasted; the top pressing mechanism can be driven by the top pressing mechanism driving device to be close to or far away from the outer surface of the pipe body to be roasted so as to perform top pressing adjustment of the corresponding position;
the top pressing mechanism comprises a first top pressing mechanism, a second top pressing mechanism, a third top pressing mechanism and a fourth top pressing mechanism, and the top pressing mechanism driving device comprises a first top pressing mechanism driving device, a second top pressing mechanism driving device, a third top pressing mechanism driving device and a fourth top pressing mechanism driving device which are matched with the first top pressing mechanism, the second top pressing mechanism, the third top pressing mechanism and the fourth top pressing mechanism; the first jacking mechanism, the second jacking mechanism, the third jacking mechanism and the fourth jacking mechanism are respectively arranged corresponding to the first distance measuring sensor, the second distance measuring sensor, the third distance measuring sensor and the fourth distance measuring sensor.
In some preferred embodiments, the center of the heating coil is arranged in line with the center of the pipe to be roasted.
In some preferred embodiments, the system further comprises a human-computer interaction device displayed on an operation terminal provided for use by a user to control at least one of the distance measuring device and the tubular adjustment device.
The invention provides a method for controlling a large-caliber thick-wall medium-frequency heating pipe shape of a bending pipe, which is based on any one of the above on-line control systems for the large-caliber thick-wall medium-frequency heating pipe shape of the bending pipe, and specifically comprises the following steps:
s100, detecting distance information between the outer surface of the pipe body to be roasted and a measurement reference through a distance measuring device arranged on the peripheral side of the pipe body to be roasted;
s200, the master control center performs numerical conversion on the distance information detected by the distance measuring device in a rectangular coordinate system of the vertical section of the steel pipe to be hot-rolled, and then obtains the section shape of the outer surface of the pipe body to enter the heating coil through least square fitting operation; the master control center compares the measured shape of the outer surface section of the pipe body with the theoretical circle of the outer surface of the vertical section of the steel pipe to obtain the diameter deviation of the vertical section of the pipe body in the horizontal direction and the vertical direction or the diameter deviation in different directions, and graphical display is carried out in a rectangular coordinate system; the main control center obtains the jacking amount of a jacking mechanism in the tubular adjusting device based on the deformation rule that the steel pipes with different specifications are subjected to external pressure, and controls the tubular adjusting device to perform jacking adjustment on the shape of the outer surface of the pipe body at the corresponding position based on the obtained jacking amount in the corresponding direction.
The invention has the beneficial effects that:
1) By the present invention provide
The invention solves the problems of difficult control of the non-roundness of the pipe end and the pipe body of the large-caliber thick-wall intermediate frequency heating bending pipe, and the non-roundness change of the main pipe of the bending pipe, so that the distances between different positions of the outer surface of the steel pipe and the intermediate frequency heating coil are changed, the heating temperature of each position of the steel pipe in the circumferential direction is uncontrollably changed, and the mechanical property of the bending pipe after bending is not uniform or even does not reach the standard
2) The invention has simple and compact structure, novelty, low cost and convenient popularization.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic structural diagram of an embodiment of a large-caliber thick-wall medium-frequency heating pipe bending online control system according to the present invention;
FIG. 2 is a left side view of an embodiment of the present invention of a large diameter thick wall medium frequency heating pipe bending on-line control system;
FIG. 3 is a top view of an embodiment of the present invention for an on-line control system for bending a large-diameter thick-wall medium frequency heating pipe;
FIG. 4 is a schematic diagram of another embodiment of the on-line control system for the large-caliber thick-wall medium frequency heating bending elbow pipe shape in the present invention.
Description of reference numerals: 100. a front roller of the intermediate-frequency heating hot pipe bending unit; 200. a heating coil; 310. the distance measuring device comprises a distance measuring component 311, a first distance measuring sensor 312, a second distance measuring sensor 313, a third distance measuring sensor 314 and a fourth distance measuring sensor; 410. a top pressing mechanism 411, a first top pressing mechanism 412, a second top pressing mechanism 413, a third top pressing mechanism 414 and a fourth top pressing mechanism; 420. a carrying device; 500. a front clamp device; 600. and (5) steel pipes.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, and it will be understood by those skilled in the art that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of the present invention.
The invention is further described with reference to the following detailed description of embodiments with reference to the accompanying drawings.
Referring to the attached drawings 1 to 3, the attached drawings are schematic structural diagrams of different angles of a specific embodiment of a large-caliber thick-wall medium-frequency heating bending elbow pipe shape online control system in the invention; the control system comprises a front roller 100 of the medium-frequency heating hot-bending unit, a heating coil 200, a distance measuring device 310, a top pressing mechanism 410 and a master control center, wherein the distance measuring device 310 and the top pressing mechanism 410 are arranged between the front roller of the medium-frequency heating hot-bending unit and the heating coil, and the distance measuring device and a tubular adjusting device are sequentially arranged along the advancing direction of a pipe to be stewed, so that the pipe to be fed into the heating coil is subjected to tubular online monitoring and tubular online control adjustment according to a detection result, the appearance of the pipe to be fed into the heating coil is ensured to meet requirements, meanwhile, the distances between different positions on the outer surface of the steel pipe and the medium-frequency heating coil are kept consistent, the heating temperatures of the positions of the steel pipe in the circumferential direction are ensured to be consistent, the mechanical properties of the stewed pipe are ensured to be uniform, the bent pipe meeting the non-roundness requirements of the pipe is obtained, subsequent rounding adjustment is not needed through the bent pipe obtained through the method, manpower is saved, the manufacturing process is reduced, the cost is saved, and the qualification rate of the bent pipe is improved.
Furthermore, the distance measuring device and the tubular adjusting device are in communication connection with the master control center; the distance measuring device is arranged on the periphery of the pipe body to be roasted to detect the distance between the outer surface of the pipe body to be roasted and the measuring reference; the master control center carries out online analysis on the shape of the outer surface of the pipe body to be stewed based on the distance information detected by the distance measuring device and formulates related measures; the on-line analysis comprises the steps of combining least square fitting operation to obtain the actual section shape of the outer surface of the pipe body to be roasted, and comparing the actual section shape with the stored theoretical section shape to obtain the diameter deviation of the outer surface of the pipe body to be roasted; the related measures comprise that the master control center controls the tubular adjusting device to perform the top pressure adjustment of the shape of the outer surface of the tube body at the corresponding position based on the diameter deviation.
Further, the distance measuring device comprises a distance measuring part 310 and a supporting device, and the distance measuring part is arranged on the periphery of the pipe body to be stewed through the supporting device; the distance measuring part comprises a first distance measuring sensor 311, a second distance measuring sensor 312, a third distance measuring sensor 313 and a fourth distance measuring sensor 314, the first distance measuring sensor, the second distance measuring sensor, the third distance measuring sensor and the fourth distance measuring sensor are respectively arranged on the upper side, the lower side, the left side and the right side of the pipe body to be roasted, and the centers of the first distance measuring sensor, the second distance measuring sensor, the third distance measuring sensor and the fourth distance measuring sensor are consistent with the center of the pipe body to be roasted (namely, the steel pipe 600); the first distance measuring sensor and the second distance measuring sensor are symmetrically arranged relative to the center of the pipe body to be roasted; the third distance measuring sensor and the fourth distance measuring sensor are symmetrically arranged relative to the center of the pipe body to be stewed; the first distance measuring sensor and the second distance measuring sensor are used for adjusting the longitudinal shape of the pipe body to be roasted, and the third distance measuring sensor and the fourth distance measuring sensor are used for adjusting the transverse shape of the pipe body to be roasted. The distance measuring device comprises a distance measuring part and a supporting device 420, and the distance measuring part is arranged on the periphery of the pipe body to be roasted through the supporting device; the tubular adjusting device comprises a top pressing mechanism, a top pressing mechanism driving device and a bearing device, and the top pressing mechanism is arranged on the periphery of the pipe body to be stewed through the bearing device; the top pressing mechanism can be close to or far away from the pipe body to be roasted under the control of the top pressing mechanism driving device; the top pressing mechanism comprises a first top pressing mechanism 411, a second top pressing mechanism 412, a third top pressing mechanism 413 and a fourth top pressing mechanism 414, and the top pressing mechanism driving device comprises a first top pressing mechanism driving device, a second top pressing mechanism driving device, a third top pressing mechanism driving device and a fourth top pressing mechanism driving device which are matched with the first top pressing mechanism, the second top pressing mechanism, the third top pressing mechanism and the fourth top pressing mechanism; the first jacking mechanism, the second jacking mechanism, the third jacking mechanism and the fourth jacking mechanism are respectively arranged corresponding to the first distance measuring sensor, the second distance measuring sensor, the third distance measuring sensor and the fourth distance measuring sensor.
Further, the front clamp device 500 is used to clamp the steel pipe to control the travel of the steel pipe.
In the invention, in the process of medium-frequency heating and roasting of the steel pipe, when the steel pipe is continuously pushed to the medium-frequency heating coil, a plurality of distance measuring sensors measure the distance between the outer surface of the steel pipe and a measuring reference in real time; the master control center firstly carries out numerical value conversion on distance data measured by the distance measuring sensor in a rectangular coordinate system of the vertical section of the roasted steel pipe, and then obtains the shape of the section of the outer surface of the steel pipe entering the heating coil through least square fitting operation; the main control center compares the measured shape of the section of the outer surface of the steel pipe with a theoretical circle of the outer surface of the vertical section of the steel pipe to obtain the diameter deviation of the vertical section of the steel pipe in the transverse direction and the longitudinal direction, and graphically displays the deformation tendency of the computer control system in a rectangular coordinate system according to the external pressure of the steel pipes with different specifications to calculate the jacking amount of the jacking mechanism; the jacking device adopting one or more combined driving modes of hydraulic drive, pneumatic drive and electric drive is used for jacking the outer surface of the steel pipe from two or more directions of horizontal direction and longitudinal direction according to jacking amount given by a computer control system, and the pipe shape of the steel pipe is adjusted on line, so that the steel pipe enters the heating coil in a relatively ideal pipe shape, and the hot bending pipe is ensured to be small in non-roundness and uniformly heated.
Referring to FIG. 4, there is shown a schematic diagram of another embodiment of the present invention of a large-caliber thick-wall medium frequency heating pipe bending online control system; the distance measuring device comprises a distance measuring part and a supporting device, and the distance measuring part is arranged on the periphery of the pipe body to be heated through the supporting device; the distance measuring part comprises a first distance measuring sensor 311, a second distance measuring sensor 312, a third distance measuring sensor 313 and a fourth distance measuring sensor 314, the first distance measuring sensor, the second distance measuring sensor, the third distance measuring sensor and the fourth distance measuring sensor are respectively arranged on the upper side, the lower side, the left side and the right side of the pipe body to be roasted, and the centers of the first distance measuring sensor, the second distance measuring sensor, the third distance measuring sensor and the fourth distance measuring sensor are consistent with the center of the pipe body to be roasted; the first distance measuring sensor and the second distance measuring sensor are symmetrically arranged relative to the center of the pipe body to be roasted; the third distance measuring sensor and the fourth distance measuring sensor are symmetrically arranged relative to the center of the pipe body to be roasted; the first distance measuring sensor and the second distance measuring sensor are used for adjusting the longitudinal shape of the pipe body to be roasted, and the third distance measuring sensor and the fourth distance measuring sensor are used for adjusting the transverse shape of the pipe body to be roasted. The supporting device comprises a rack, a driving device and a rotating device, wherein the rack is of an annular structure; the rotating device is arranged in the annular structure, the first distance measuring sensor, the second distance measuring sensor, the third distance measuring sensor and the fourth distance measuring sensor are fixedly arranged in the rotating device, and the first distance measuring sensor, the second distance measuring sensor, the third distance measuring sensor and the fourth distance measuring sensor are all arranged perpendicular to the pipe body to be heated; the rotating device can drive the first distance measuring sensor, the second distance measuring sensor, the third distance measuring sensor and the fourth distance measuring sensor to rotate clockwise or anticlockwise under the driving of the rotating device. The tubular adjusting device comprises a bearing device 420, a jacking mechanism driving device, a jacking mechanism rotating device 430 and a jacking mechanism rotating driving device; the bearing device and the jacking mechanism rotating device are both of annular structures, and the jacking mechanism rotating device and the bearing device are arranged concentrically; the top pressing mechanism rotating device can rotate under the driving of the top pressing mechanism rotating driving device to move to a corresponding position to be adjusted on the outer surface of the pipe body to be roasted; the top pressing mechanism can be driven by the top pressing mechanism driving device to be close to or far away from the outer surface of the pipe body to be stewed so as to perform top pressing adjustment on the corresponding position; the top pressing mechanism comprises a first top pressing mechanism 411, a second top pressing mechanism 412, a third top pressing mechanism 413 and a fourth top pressing mechanism 414, and the top pressing mechanism driving device comprises a first top pressing mechanism driving device, a second top pressing mechanism driving device, a third top pressing mechanism driving device and a fourth top pressing mechanism driving device which are matched with the first top pressing mechanism, the second top pressing mechanism, the third top pressing mechanism and the fourth top pressing mechanism; the first jacking mechanism, the second jacking mechanism, the third jacking mechanism and the fourth jacking mechanism are respectively arranged corresponding to the first distance measuring sensor, the second distance measuring sensor, the third distance measuring sensor and the fourth distance measuring sensor.
Furthermore, a plurality of distance measuring parts can be arranged, the plurality of distance measuring parts are arranged in an array manner, and the center of a fitting circle formed by the plurality of distance measuring parts is consistent with the center of the fitting circle of the pipe body to be heated; the plurality of jacking mechanisms can be arranged, the plurality of jacking mechanisms are arranged in an array manner, and the plurality of jacking mechanisms and the plurality of distance measuring components are arranged in a one-to-one correspondence manner; the plurality of top pressing mechanism driving devices are arranged, and the plurality of top pressing mechanism driving devices and the plurality of top pressing mechanisms are arranged in a one-to-one correspondence manner; the plurality of distance measuring components form an annular detection device on the periphery of the steel pipe body so as to detect important areas outside the steel pipe body, and the plurality of jacking mechanisms can perform corresponding jacking adjustment according to the detection results of the plurality of corresponding distance measuring components.
Furthermore, the distance measuring component is a laser distance measuring sensor; the protection device is arranged on the periphery of the laser ranging sensor and used for protecting the laser ranging sensor against high temperature, high heat radiation, water vapor and strong electromagnetic interference.
Preferably, the center of the heating coil is arranged in line with the center of the pipe body to be roasted.
The system also comprises a man-machine interaction device which is displayed on a portable operating terminal provided for the user to control at least one of the distance measuring device and the tubular adjustment device.
Furthermore, the jacking amount can be adjusted by one or more combined driving modes of hydraulic driving, pneumatic driving and electric driving.
The invention provides a large-caliber thick-wall medium-frequency heating pipe bending control method, which is based on a large-caliber thick-wall medium-frequency heating pipe bending online control system and specifically comprises the following steps of: s100, detecting distance information between the outer surface of the pipe body to be roasted and a measuring reference through a distance measuring device arranged on the peripheral side of the pipe body to be roasted; s200, the master control center performs numerical conversion on the distance information detected by the distance measuring device in a rectangular coordinate system of the vertical section of the steel pipe to be hot-rolled, and then obtains the section shape of the outer surface of the pipe body to enter the heating coil through least square fitting operation; the master control center compares the measured shape of the outer surface section of the pipe body with the theoretical circle of the outer surface of the vertical section of the steel pipe to obtain the diameter deviation of the vertical section of the pipe body in the horizontal direction and the vertical direction or the diameter deviation in different directions, and graphical display is carried out in a rectangular coordinate system; the main control center obtains the jacking amount of a jacking mechanism in the tubular adjusting device based on the deformation rule that the steel pipes with different specifications are subjected to external pressure, and controls the tubular adjusting device to perform jacking adjustment on the shape of the outer surface of the pipe body at the corresponding position based on the obtained jacking amount in the corresponding direction.
Furthermore, the master control center can be a computer control system; in the process of medium-frequency heating and bending of the steel pipe, a plurality of distance measuring sensors measure the distance between the outer surface of the steel pipe and a measuring reference in real time, a computer control system performs fitting operation on measured data to obtain the shape of the section of the outer surface of the steel pipe entering a heating coil, the shape deviation of the section of the outer surface of the detected steel pipe is obtained by comparing the measured data with an ideal section shape, and a transverse jacking mechanism and a longitudinal jacking mechanism are driven to jack the steel pipe according to the deviation, so that the steel pipe enters the heating coil in a relatively ideal pipe shape, and the hot bending pipe is guaranteed to be small in non-roundness and uniform in heating; the invention can obviously improve the pipe shape and the performance uniformity of the large-caliber thick-wall intermediate frequency heating bending elbow.
While the invention has been described with reference to a preferred embodiment, various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention, and particularly, features shown in the various embodiments may be combined in any suitable manner without departing from the scope of the invention. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, which indicate a directional or positional relationship, are based on the directional or positional relationship as shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is apparent to those skilled in the art that the scope of the present invention is not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can be within the protection scope of the invention.
Claims (9)
1. A large-caliber thick-wall medium-frequency heating pipe bending online control system comprises a front roller of a medium-frequency heating hot pipe bending unit and a heating coil, wherein the large-caliber thick-wall refers to the diameter of 1422mm, and the wall thickness of 21.4mm-38.5 mm; the distance measuring device and the tubular adjusting device are in communication connection with the master control center;
the distance measuring device is arranged on the peripheral side of the pipe body to be heated so as to detect the distance between the outer surface of the pipe body to be heated and a measuring reference;
the master control center carries out online analysis on the shape of the outer surface of the pipe body to be stewed based on the distance information detected by the distance measuring device and formulates related measures; the on-line analysis comprises the steps of combining least square fitting operation to obtain the actual section shape of the outer surface of the pipe body to be roasted, and comparing the actual section shape with the stored theoretical section shape to obtain the diameter deviation of the outer surface of the pipe body to be roasted; the related measures comprise that the master control center controls the tubular adjusting device to perform top pressure adjustment on the shape of the outer surface of the tube body at the corresponding position based on the diameter deviation.
2. The pipe-shaped on-line control system for the large-caliber thick-wall medium-frequency heating bending machine of claim 1, wherein the distance measuring device comprises a distance measuring part and a supporting device, and the distance measuring part is arranged on the periphery of the pipe body to be heated through the supporting device; the periphery of the distance measuring part is provided with a protective cover made of a metal material which does not generate an electromagnetic induction effect, the inner wall of the protective cover is provided with a disc-shaped water cooling pipeline, and compressed air is introduced into an inner cavity of the protective cover to keep positive pressure so as to prevent high-temperature water vapor from entering; the supporting device is made of a metal material which does not generate an electromagnetic induction effect;
the range finding part is provided with a plurality ofly, and is a plurality of range finding part array sets up, and is a plurality of the centre of a circle of the fitting circle that the range finding part constitutes sets up unanimously with the fitting centre of a circle of treating the hot water pipe body.
3. The on-line control system for the pipe shape of the large-caliber thick-wall medium-frequency heating bending pipe according to claim 2, wherein the pipe-shaped adjusting device comprises a jacking mechanism, a jacking mechanism driving device and a bearing device, and the jacking mechanism is arranged on the periphery of the pipe body to be heated through the bearing device; the top pressing mechanism can be close to or far away from the pipe body to be roasted under the control of the top pressing mechanism driving device;
the plurality of jacking mechanisms are arranged in an array manner and correspond to the plurality of distance measuring components one by one; the top pressing mechanism driving devices are arranged in a plurality, and the top pressing mechanism driving devices and the top pressing mechanisms are arranged in a one-to-one correspondence mode.
4. The large-caliber thick-wall medium-frequency heating pipe bending online control system according to claim 1, wherein the distance measuring device comprises a distance measuring part and a supporting device, and the distance measuring part is arranged on the periphery of the pipe body to be hot-bent through the supporting device;
the distance measuring part comprises a first distance measuring sensor, a second distance measuring sensor, a third distance measuring sensor and a fourth distance measuring sensor, the first distance measuring sensor, the second distance measuring sensor, the third distance measuring sensor and the fourth distance measuring sensor are respectively arranged on the upper side, the lower side, the left side and the right side of the pipe body to be roasted, and the centers of the first distance measuring sensor, the second distance measuring sensor, the third distance measuring sensor and the fourth distance measuring sensor are consistent with the center of the pipe body to be roasted; the first distance measuring sensor and the second distance measuring sensor are symmetrically arranged relative to the center of the pipe body to be roasted; the third distance measuring sensor and the fourth distance measuring sensor are symmetrically arranged relative to the center of the pipe body to be stewed; the first distance measuring sensor and the second distance measuring sensor are used for adjusting the longitudinal shape of the pipe to be roasted, and the third distance measuring sensor and the fourth distance measuring sensor are used for adjusting the transverse shape of the pipe to be roasted.
5. The large-caliber thick-wall medium-frequency heating pipe bending online control system of claim 4, wherein the support device comprises a frame, a driving device and a rotating device, and the frame is of an annular structure;
the rotating device is arranged in the annular structure, the first distance measuring sensor, the second distance measuring sensor, the third distance measuring sensor and the fourth distance measuring sensor are fixedly arranged in the rotating device, and the first distance measuring sensor, the second distance measuring sensor, the third distance measuring sensor and the fourth distance measuring sensor are all arranged perpendicular to the pipe body to be heated; the rotating device is driven by the rotating device to drive the first distance measuring sensor, the second distance measuring sensor, the third distance measuring sensor and the fourth distance measuring sensor to rotate clockwise or anticlockwise.
6. The large-caliber thick-wall intermediate frequency heating pipe bending online control system according to claim 5, wherein the tubular adjusting device comprises a bearing device, a jacking mechanism driving device, a jacking mechanism rotating device and a jacking mechanism rotating driving device; the bearing device and the jacking mechanism rotating device are both of annular structures, and the jacking mechanism rotating device and the bearing device are arranged concentrically; the top pressing mechanism rotating device can rotate under the driving of the top pressing mechanism rotating driving device to move to a corresponding position to be adjusted on the outer surface of the pipe body to be roasted; the top pressing mechanism can be driven by the top pressing mechanism driving device to be close to or far away from the outer surface of the pipe body to be roasted so as to perform top pressing adjustment of the corresponding position;
the top pressing mechanism comprises a first top pressing mechanism, a second top pressing mechanism, a third top pressing mechanism and a fourth top pressing mechanism, and the top pressing mechanism driving device comprises a first top pressing mechanism driving device, a second top pressing mechanism driving device, a third top pressing mechanism driving device and a fourth top pressing mechanism driving device which are matched with the first top pressing mechanism, the second top pressing mechanism, the third top pressing mechanism and the fourth top pressing mechanism; the first jacking mechanism, the second jacking mechanism, the third jacking mechanism and the fourth jacking mechanism are respectively arranged corresponding to the first distance measuring sensor, the second distance measuring sensor, the third distance measuring sensor and the fourth distance measuring sensor.
7. The large-caliber thick-wall medium-frequency heating pipe bending online control system of claim 1, wherein the center of the heating coil is consistent with the center of the pipe to be heated.
8. The on-line control system for the large-caliber thick-wall medium-frequency heating and bending elbow pipe shape of claim 1, further comprising a human-computer interaction device, wherein the human-computer interaction device is displayed on an operation terminal provided for a user to control at least one of the distance measuring device and the pipe-shape adjusting device.
9. A large-caliber thick-wall medium-frequency heating bending elbow pipe shape control method is based on the large-caliber thick-wall medium-frequency heating bending elbow pipe shape on-line control system of any one of claims 1 to 8, and specifically comprises the following steps:
s100, detecting distance information between the outer surface of the pipe body to be roasted and a measuring reference through a distance measuring device arranged on the peripheral side of the pipe body to be roasted;
s200, the master control center performs numerical conversion on the distance information detected by the distance measuring device in a rectangular coordinate system of the vertical section of the steel pipe to be hot-rolled, and then obtains the section shape of the outer surface of the pipe body to enter the heating coil through least square fitting operation; the master control center compares the measured shape of the outer surface section of the pipe body with the theoretical circle of the outer surface of the vertical section of the steel pipe to obtain the diameter deviation of the vertical section of the pipe body in the horizontal direction and the longitudinal direction or the diameter deviation in different directions, and performs graphical display in a rectangular coordinate system; the main control center obtains the jacking amount of a jacking mechanism in the tubular adjusting device based on the deformation rule that the steel pipes with different specifications are subjected to external pressure, and controls the tubular adjusting device to perform jacking adjustment on the shape of the outer surface of the pipe body at the corresponding position based on the obtained jacking amount in the corresponding direction.
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| CN114643304B (en) * | 2022-03-11 | 2023-06-09 | 国营芜湖机械厂 | Adjustable pipe fitting three-dimensional bending device and method |
| CN115356971B (en) * | 2022-10-14 | 2022-12-27 | 江苏新恒基特种装备股份有限公司 | System and method for accurately monitoring and controlling heating and adjusting process of intermediate-frequency bent pipe |
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| JP2003164918A (en) * | 2001-11-28 | 2003-06-10 | Dai Ichi High Frequency Co Ltd | Method and apparatus for bending work of metal pipe |
| CN202239140U (en) * | 2011-09-23 | 2012-05-30 | 湖南四化建高压阀门管件有限公司 | Bending equipment for urea class stainless steel tubes |
| CN102632107A (en) * | 2012-04-24 | 2012-08-15 | 中国石油集团工程设计有限责任公司 | Controlling and testing method of hot-bending elbow manufacturing for Phi1420 pipeline |
| CN104138942B (en) * | 2014-07-29 | 2016-06-29 | 中国化学工程第三建设有限公司 | A kind of bending heavy steel member manufacture method based on flame simmering and bending |
| CN104372168B (en) * | 2014-11-26 | 2016-06-22 | 中国航天科技集团公司长征机械厂 | A kind of shell product end face circularity oscillating aging corrector and straightening method thereof |
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| CN208245514U (en) * | 2018-05-17 | 2018-12-18 | 嘉兴市亚庆机械制造有限公司 | A kind of high-precision full-automatic bending machine |
| CN210208172U (en) * | 2019-06-13 | 2020-03-31 | 河北新兴铸管有限公司 | Automatic metal pipe roundness correcting device |
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