CN109425655B

CN109425655B - Progressive feeding fine straightening method for metal pipe

Info

Publication number: CN109425655B
Application number: CN201710735392.XA
Authority: CN
Inventors: 吴建军; 赵伟
Original assignee: Chongqing Iron & Steel Institute Co ltd
Current assignee: CHONGQING IRON & STEEL INSTITUTE Co.,Ltd.
Priority date: 2017-08-24
Filing date: 2017-08-24
Publication date: 2021-11-02
Anticipated expiration: 2037-08-24
Also published as: CN109425655A

Abstract

The invention discloses a progressive feeding and fine straightening method for a metal pipe, which comprises the step of straightening the metal pipe by means of straightening rollers arranged in pairs in the process that the metal pipe axially advances. The invention can realize the gradual straightening during feeding before flaw detection of the metal pipe so as to improve the flaw detection effect, and has the advantages of simple implementation and good straightening effect.

Description

Progressive feeding fine straightening method for metal pipe

Technical Field

The invention relates to a metal tube flaw detection feeding technology; in particular to a progressive feeding and fine straightening method for a metal pipe.

Background

Metal pipes (mainly steel pipes) are important building materials which are widely applied, and the metal pipe wall has defects of longitudinal cracks, transverse cracks, folding, layering and the like due to the influence of various factors in the production process of the metal pipe. If the metal pipe is defective, the metal pipe can be broken in use to cause accidents, even serious consequences can be caused, and serious economic loss and even casualties can be caused. In order to ensure the quality of the outgoing metal pipe, the existing flaw detection methods mainly comprise ultrasonic flaw detection and eddy current flaw detection methods. The existing metal pipe flaw detection line usually uses ultrasonic flaw detection and eddy current flaw detection as independent operation systems, but two kinds of detection are often required to be completed along with the improvement of the detection requirements of the existing metal pipe, at the moment, an operator is required to feed the metal pipe subjected to one kind of flaw detection and then transfer the metal pipe to the next flaw detection, the defects of repeated work, high labor intensity, long detection operation period and low efficiency exist, and the defect becomes a factor for limiting the flaw detection speed of the metal pipe.

In the existing metal pipe flaw detection equipment, no matter import equipment or domestic equipment, a natural pipe is subjected to rolling forming and then enters a flaw detection link. The surface of the rolled metal pipe is inevitably subjected to improper conveying and placing, stress aging deformation of the rolled metal pipe, or influence of external factors and the like, which cause the metal pipe to deform again before flaw detection, if the metal pipe is not processed in time, the deformed metal pipe influences the flaw detection effect due to poor straightness or surface quality, and the flaw detection stability cannot be ensured. If not cleaned in time, the flaw detection is greatly influenced, serious interference is generated in the flaw detection process, and even false alarm and even report missing can be generated.

Meanwhile, the ultrasonic automatic flaw detector is widely used in the flaw detection industry of metal pipe parts by ultrasonic detection, for example, in the automatic flaw detector for metal pipe parts. The existing online ultrasonic flaw detection of metal pipes generally adopts a probe water film coupling method to carry out online flaw detection. When automatic ultrasonic flaw detection is performed on a metal pipe, a probe is generally pressed on the outer surface of the metal pipe at a certain distance by a certain mechanical mechanism, a certain gap is reserved between the probe and the metal pipe by adjusting an adjusting system on a probe frame, water is filled to form a coupling water film, and flaw detection is performed by means of ultrasonic emission. In the actual automatic flaw detection process, because the metal tube is in the transmission process of detection, the probe of the existing ultrasonic automatic flaw detection device is usually directly fixed on a probe support, and the probe support is fixedly connected with a flaw detection water tank, because the types of the metal tubes are more, the probes are fixedly arranged, and the flaw detection requirements of the metal tubes with different types cannot be met. Meanwhile, in the flaw detection process of the metal tube, when the flaw position of the metal tube passes, the metal tube is easy to touch the probe to cause the vibration and the tilting of the probe, so that the amplitude of a flaw signal changes, and if the flaw detection cannot be timely adjusted, the reliability and the accuracy of flaw detection can be influenced. The same problem also exists with eddy current testing.

In order to solve the problems, the applicant considers that in a metal tube flaw detection device, when a metal tube is subjected to flaw detection, straightening is firstly carried out, then feeding is carried out, flaw detection is carried out, the influence on the flaw detection effect caused by poor straightness or surface quality due to self deformation of the metal tube can be better avoided, and the accuracy and the reliability of flaw detection are improved.

However, the problem to be solved is how to realize the straightening of the metal tube, and the straightening has the advantages of simple implementation, good straightening effect and the like.

Disclosure of Invention

Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide a metal tube progressive feeding fine correction method which can realize the straightening of the metal tube before flaw detection during feeding and has simple implementation and good straightening effect.

In order to solve the technical problems, the invention adopts the following technical scheme:

a progressive feeding and fine straightening method for a metal pipe comprises the step of straightening the metal pipe by means of straightening rollers arranged in pairs in the process that the metal pipe axially moves forward, and is characterized in that a plurality of pairs of horizontally arranged straightening rollers are adopted, and the mode that the pressing and straightening force of each pair of straightening rollers is adjusted to be sequentially increased along the movement direction of the metal pipe is adopted to realize straightening.

Therefore, the pressing and straightening force is sequentially increased along the advancing direction of the metal pipe, the metal pipe is gradually extruded and straightened for multiple times in the feeding and straightening device, the fine straightening is realized, the final straightening effect is improved, and the reliability of subsequent flaw detection is better ensured.

As optimization, the metal pipe is straightened by means of a metal pipe feeding straightening device, the metal pipe feeding straightening device comprises straightening rollers which are arranged in pairs, the circumferential surfaces of the straightening rollers are arc-shaped with concave middle parts, two straightening rollers in each pair of straightening rollers are arranged on the two sides of the left side and the right side of a metal pipe moving path, the metal pipe feeding straightening device also comprises a reference side plate and an adjusting side plate which are vertically and oppositely arranged on the left side and the right side of the metal pipe moving path, and the reference side plate and the adjusting side plate are arranged along the direction of the metal pipe moving path and are parallel to each other; the inner side surface of the reference side plate is fixedly provided with a row of straightening roll base plates along the movement path direction of the metal pipe, the straightening rolls arranged on the row of straightening roll base plates form straightening rolls for the reference, the inner side surface of the adjusting side plate and the reference straightening rolls are just opposite to the row of straightening roll base plates, and straightening roll adjusting mechanisms are respectively arranged on the row of straightening roll base plates, the straightening roll adjusting mechanisms are just opposite to the front end of the metal pipe and are provided with straightening rolls for forming straightening rolls for adjustment, the straightening rolls for the reference and the straightening rolls for adjustment are arranged in pairs one by one and are used for realizing compression and straightening of the metal pipe, and the straightening roll adjusting mechanisms are used for changing the distance between the straightening rolls for adjustment and the metal pipe.

Therefore, the pressing and straightening forces of each pair of straightening rollers to the metal pipe can be sequentially adjusted by the aid of the straightening roller adjusting mechanisms, so that the pressing and straightening forces are sequentially increased progressively along the advancing direction of the metal pipe, the metal pipe is gradually extruded and straightened for multiple times in the feeding straightening device, the final straightening effect is improved, and the reliability of subsequent flaw detection is better guaranteed. Meanwhile, the straightening roller for the reference on one side of the metal pipe can be used as an adjusting positioning reference, so that the central line of the metal pipe is better ensured to be consistent with the movement path, and the straightness of the metal pipe after final straightening is ensured. Therefore, the center line of the metal pipe is still consistent with the movement path after the pressing and straightening forces of each pair of straightening rollers are adjusted to be sequentially increased along the movement direction of the metal pipe; better guarantee the straightening effect.

Preferably, the reference side plate is provided with a driving helical gear and a driven helical gear which are meshed with each other corresponding to the reference straightening roller, the driving helical gear is in transmission connection with a motor for advancing the metal pipe in the metal pipe transmission device, and the driven helical gear is coaxially and fixedly connected with the reference straightening roller.

Therefore, the straightening roller for the benchmark can actively rotate to apply force to the metal pipe by depending on a motor which is used for driving the metal pipe to advance in the metal pipe transmission device, actively apply force to the metal pipe, and can better ensure the straightening effect of the metal pipe. The adoption of the connection of the straightening roller for the reference and the motor can ensure the stability and the reliability of transmission.

As optimization, the progressive metal pipe fine correction device comprises a straightening box, the straightening box comprises two side plates which are vertically arranged and located in the left and right directions of a metal pipe moving path and two end plates which are located in the direction of the metal pipe moving path, the two side plates and the two end plates are enclosed into a rectangular frame and fixed on a bottom plate, openings for metal pipes to pass through are formed in the middle parts of the two end plates, and the two side plates form a reference side plate and an adjusting side plate.

Therefore, the straightening box can better ensure the installation of the straightening rollers and the straightening pipe adjusting mechanism as a whole, ensure the mutual position relation among the straightening rollers and better ensure the straightening effect.

Furthermore, a transverse reinforcing rod is transversely fixedly connected between the two side plates. Therefore, the strength of the straightening box can be better improved, and the strength of the mutual force applied by each pair of straightening rollers is ensured to be enough to meet the straightening effect.

Furthermore, two sections of arc-shaped holes for adjusting are arranged on the bottom plate of the straightening roller, the two sections of arc-shaped holes for adjusting are arranged on the basis of the same circle center, the position of the circle center is horizontally opposite to the central position of the straightening roller on the bottom plate of the straightening roller, bolts are arranged on the side plates corresponding to the two sections of arc-shaped holes for adjusting respectively, penetrate through the arc-shaped holes for adjusting and are fixed by nuts.

Therefore, the installation angle of the bottom plate of the straightening roller can be changed by means of two sections of arc-shaped holes for adjustment, and the straightening roller and the metal pipe are pressed and adjusted in a spiral line contact pressing mode, so that the pressing force of the end part of the straightening roller on the metal pipe can be changed by rotating the straightening roller along the central position of the straightening roller, and further the adjustment of the pressing force of the straightening roller can be realized. Particularly, the straightening roll for the reference on the reference side plate needs to be used as a reference for pressing adjustment, so that once the distance position between the straightening roll and the metal pipe is set, the adjustment cannot be changed, the straightening pressure is reduced after the surface of the straightening roll is abraded for a period of time, and the straightening effect cannot be guaranteed. At the moment, only a new straightening roller can be replaced; however, after the installation structure of the arc-shaped hole for adjustment is adopted, when the surface of the straightening roller for the reference on the reference side plate is abraded to reduce the straightening pressure, the pressing force of the straightening roller on the metal pipe can be improved by changing the installation angle of the straightening roller, so that the service life of the straightening roller can be prolonged to a certain extent, and the production cost is greatly saved.

Furthermore, the bottom plate of the straightening roller is a circular plate, the circle center of the circular plate is the same as the corresponding circle center of the arc-shaped hole for adjustment, an angle scale is arranged on the side plate on the outer side of the upper end of the bottom plate of the straightening roller, and an angle pointer line is arranged on the bottom plate of the straightening roller over against the angle scale.

Therefore, when the angle of the bottom plate of the straightening roller needs to be adjusted in a rotating mode, the required angle can be adjusted better according to the angle scale.

Furthermore, the straightening roller adjusting mechanism comprises a round table which protrudes outwards from the middle part of the outer side surface of the bottom plate of the straightening roller and penetrates through the outer surface of the side plate, the round table and the side plate are fixedly arranged, the middle part of the round table penetrates through the round table and the bottom plate of the straightening roller along the axial lead and is provided with a through hole, the outer end of the through hole is provided with a small-diameter section, the inner end of the through hole is provided with a large-diameter section, an adjusting rod is coaxially arranged in the small-diameter section of the through hole and can be matched with the small-diameter section of the through hole in a rotating way, the outer end of the adjusting rod extends out of the round table and is fixedly provided with an adjusting handle, an axial limiting structure used for limiting the axial movement of the adjusting rod is arranged between the adjusting rod and the small-diameter section of the through hole, the large-diameter section of the through hole can be connected with the end part of a roller seat connecting cylinder in an axial sliding way, a circumferential limiting structure used for limiting the rotation of the roller seat connecting cylinder is arranged between the large-diameter section of the through hole and the roller seat connecting cylinder, and the inner circumferential surface of one end of the roller seat connecting cylinder, which is positioned in the through hole, is provided with internal threads, the internal thread is connected with the external thread on the adjusting rod in a matching way, and the roller seat used for installing the straightening roller is arranged at one end, far away from the through hole, of the roller seat connecting cylinder.

Therefore, the adjusting handle is rotated, the roller seat connecting cylinder can be driven to do telescopic motion along the axial direction by means of the rotation of the adjusting rod, and then the roller seat and the straightening roller on the roller seat are driven to approach or keep away from the direction opposite to the metal pipe, and further the adjustment of the pressing force of the straightening roller is realized. Has the advantages of simple structure, convenient, fast and reliable adjustment, etc.

Furthermore, the axial limiting structure between the adjusting rod and the small-diameter section of the through hole is obtained by matching a circle of protrusions and grooves in the circumferential direction between the surface of the adjusting rod and the inner wall of the through hole. The limiting device has the characteristics of simple structure and reliable limiting.

Furthermore, the circumferential limiting structure between the large-diameter section of the through hole and the roller seat connecting cylinder is obtained by matching a protrusion and a groove between the surface of the roller seat connecting cylinder and the inner wall of the through hole along the axial direction. The limiting device has the characteristics of simple structure and reliable limiting.

Furthermore, a fastening bolt penetrates through the circumferential surface of the circular truncated cone perpendicularly and is screwed, and the inner end of the fastening bolt is used for being in contact with the adjusting rod to realize pressing and fixing. Like this, after rotating adjustment handle rotation regulation and finishing, can rely on fastening bolt to realize the location lock and die, prevent to become flexible.

As optimization, the metal tube is driven to move forwards along the axis direction by the metal tube transmission device, the metal tube transmission device comprises a metal tube advancing mechanism for driving the metal tube to advance along the axis and a metal tube rotating mechanism for driving the metal tube to rotate by taking the axis as the center;

the metal tube advancing mechanism comprises a pair of advancing rollers, the circumferential surfaces of the advancing rollers are provided with inwards concave arc-shaped friction grooves, the friction grooves on the circumferential surfaces of the advancing rollers are oppositely arranged and used for clamping the metal tube in the metal tube, the two advancing rollers are in transmission connection with the same metal tube advancing motor through a set of advancing roller transmission mechanism, and the metal tube advancing motor is used for driving the two advancing rollers to rotate relatively so as to drive the metal tube to advance.

Therefore, the metal pipe rotates while advancing, so that the metal pipe is in a rotating advancing state when being straightened, the contact area range of the straightening roller and the metal pipe in unit time is enlarged, and the straightening effect and the straightening efficiency are improved. Simultaneously, the metal tube can also make the scope of detecting a flaw of probe among the metal tube device of detecting a flaw bigger with rotatory mode of going forward, can rely on fixed probe to realize that the metal tube upwards detects a flaw to the week, avoids lou examining better, has strengthened the reliability and the stability of detecting a flaw for can rely on less probe to realize better effect of detecting a flaw. Wherein, the tubular metal resonator relies on the roller that advances of a pair of synchronous relative rotation to drive to realize advancing, guarantees that the tubular metal resonator advances reliably, and avoids the unbalanced application of force to lead to the tubular metal resonator to warp in order to influence follow-up flaw detection, guarantees the effect of detecting a flaw better.

Preferably, the metal tube advancing mechanism further comprises an advancing roller mounting frame with a rectangular frame structure, two advancing roller shafts arranged in parallel at intervals are rotatably mounted in the inner cavity of the advancing roller mounting frame, the planes of the two advancing roller shafts are perpendicular to the motion path of the metal tube, the advancing rollers are mounted on the advancing roller shafts, the advancing roller transmission mechanism comprises the advancing roller shafts and intermediate shafts arranged in parallel at intervals with the advancing roller shafts, the intermediate shafts are rotatably mounted on the advancing roller mounting frame and provided with a power input end extending out of the advancing roller mounting frame, the power input ends of the respective intermediate shafts in the two advancing roller transmission mechanisms extend out of different sides of the advancing roller mounting frame, the parts of the intermediate shafts located in the advancing roller mounting frame are in transmission connection with the corresponding advancing roller shafts through a pair of external gears, and worm gears are mounted on the power input ends of the intermediate shafts located outside the advancing roller mounting frame, worm wheel and a worm that is on a parallel with tubular metal resonator motion path direction and sets up at the roller mounting bracket lateral surface that advances mesh, and two sets of roller drive mechanism's that advances worm is provided with gear and a power input gear meshing in the one end of equidirectional separately, power input gear perpendicular to tubular metal resonator motion path sets up and rotationally installs on the outer terminal surface of roller mounting bracket that advances, the roller mounting bracket that advances all leaves the space that supplies the tubular metal resonator to pass through along tubular metal resonator motion path direction's front and back both ends terminal surface and power input gear middle part, and the one end and the tubular metal resonator of power input gear advance and connect with motor drive.

This tubular metal resonator mechanism that advances like this can rely on same tubular metal resonator to advance and drive two relative synchronous rotations of roller that advances simultaneously with electronic, realizes the transmission of tubular metal resonator better. Meanwhile, the metal tube advancing mechanism has the advantages of simple structure, ingenious and compact layout, reliable transmission and the like. Furthermore, one end of the power input gear is connected with the metal pipe advancing motor in a transmission mode through a belt, so that the structure is simple, the transmission is reliable, and further, the metal pipe advancing motor is located on the bottom plate below the advancing roller mounting frame, so that the structure is simple, the installation is convenient, and the power transmission is convenient.

As optimization, still be provided with tubular metal resonator friction guiding mechanism among the tubular metal resonator advancing mechanism, tubular metal resonator friction guiding mechanism is including a pair of lever drive plate that the interval set up side by side, and lever drive plate place plane and tubular metal resonator advancing direction are parallel, and lever drive plate rotationally installs same root on the jackshaft, one is installed to the one end that lever drive plate is located the advancing roller mounting bracket advancing the roller and constituting the adjusting and with advancing the roller axle, a horizontal fixedly connected with regulating plate between two lever drive plate rear ends, be provided with the regulation hole of a bar along the tubular metal resonator advancing direction on the regulating plate, be provided with an adjusting bolt in the regulation hole perpendicularly, adjusting bolt one end is fixed on the advancing roller mounting bracket, and adjusting bolt is located the upper and lower surface of regulating plate and respectively has connect a set nut soon.

In the structure, the adjusting position is transferred to the outer position of the advancing roller mounting frame by adopting the lever transmission plate, so that the adjusting operation is more convenient and labor-saving, and meanwhile, the lever transmission plate takes the intermediate shaft as a rotating axis, so that the transmission structure of the advancing roller transmission mechanism is not influenced in the adjusting process; therefore, the adjustable adjusting device has the advantages of simple structure, reliable, convenient, fast and labor-saving adjustment and the like. Meanwhile, the structure can be conveniently adjusted to realize the compression transmission of metal pipes with different sizes and models.

Preferably, the metal tube rotating mechanism comprises a main transmission box body, guide sleeves are rotatably arranged at the front end and the rear end of the main transmission box body along the advancing path direction of the metal tube, a hollow main shaft is fixedly connected between the guide sleeves, the guide sleeves and the inner cavity of the hollow main shaft form the advancing path of the metal tube, the front end and the rear end of the advancing roller mounting frame are fixedly arranged on the hollow main shaft, a rotating output wheel is fixedly arranged on the hollow main shaft, and the rotating output wheel is in transmission connection with a motor for rotating the metal tube.

Like this, can rely on the tubular metal resonator rotation to pass through the belt pulley with the motor and drive hollow main shaft rotatory, and then drive whole roller mounting bracket that gos forward rotatory for the tubular metal resonator is driven when being driven to go forward and is rotated. Therefore, the metal pipe rotating mechanism can drive the metal pipe to rotate, meanwhile, the metal pipe cannot move forwards, and the metal pipe rotating mechanism has the advantages of being simple in structure, reliable in transmission, stable in rotating output and the like.

Furthermore, the rotary output wheel is a belt pulley and is in transmission connection with a motor for rotating the metal tube through a belt mechanism; the structure is simple, the cost is low, the implementation is facilitated, and the cost is low. Still further, the motor for rotating the metal tube is arranged below the main transmission box body and is arranged in parallel with the motor for advancing the metal tube, so that the structure is compact, the installation is convenient, and the transmission is reliable.

In conclusion, the invention can realize progressive pressing and straightening during feeding before flaw detection of the metal pipe so as to improve the flaw detection effect, and has the advantages of simple structure and good straightening effect.

Drawings

FIG. 1 is a schematic diagram of a metallic pipe inspection system for carrying out the method of the present invention. The metal pipe feeding and straightening device is partially in a state that a regulating side plate is cut away so as to show the internal structure.

FIG. 2 is a top view of the metal tube feed straightener of FIG. 1.

Fig. 3 is a schematic structural diagram of the straightening roll adjusting mechanism in fig. 2.

Fig. 4 is a schematic view showing a connection structure of the reference straightening roll and the reference side plate in fig. 2 (only one reference straightening roll is shown).

Fig. 5 is a schematic perspective view of the metal pipe transmission device in fig. 1 (the positioning nut and the adjusting bolt are omitted in the drawing).

Fig. 6 is a view of fig. 5 rotated at an angle.

Fig. 7 is a front view of the metal pipe flaw detector shown in fig. 1 (the bolt is omitted in the drawing).

Fig. 8 is a schematic structural view of fig. 7 after being rotated by an angle.

Fig. 9 is a schematic structural view of fig. 7 rotated by another angle.

Fig. 10 is a vertical sectional view of the metal tube flaw detector.

Detailed Description

The present invention will be described in further detail with reference to a metal pipe flaw detection system used in the practice of the present invention and its accompanying drawings.

The specific implementation mode is as follows: a progressive feeding and fine straightening method for a metal pipe comprises the step of straightening the metal pipe by means of straightening rollers arranged in pairs in the process that the metal pipe advances along the axial direction.

Therefore, the metal pipe rotates while advancing, so that the metal pipe is in a rotating advancing state when being straightened, the contact area range of the straightening roller and the metal pipe in unit time is enlarged, and the straightening effect and the straightening efficiency are improved. Simultaneously, the metal tube can also make the scope of detecting a flaw of probe among the metal tube device of detecting a flaw bigger with rotatory mode of going forward, can rely on fixed probe to realize that the metal tube upwards detects a flaw to the week, avoids lou examining better, has strengthened the reliability and the stability of detecting a flaw for can rely on less probe to realize better effect of detecting a flaw.

The present invention can be specifically realized by the metal pipe flaw detection system shown in fig. 1 to 10. The system comprises a bottom plate, wherein a metal tube transmission device 1 used for driving a metal tube to move along the axis direction and a metal tube flaw detection device 2 arranged on the motion path of the metal tube are arranged on the bottom plate, the system also comprises a metal tube feeding and straightening device 3 arranged on the bottom plate, and the metal tube feeding and straightening device 3 is arranged at the feeding end of the metal tube transmission device and used for straightening the metal tube.

Therefore, the metal pipe is straightened and then fed for flaw detection, the influence on the flaw detection effect caused by poor straightness or surface quality due to self deformation of the metal pipe can be better avoided, and the accuracy and the reliability of flaw detection are improved.

Wherein, tubular metal resonator feeding straightener 3 includes the straightener roller 4 that sets up in pairs, and straightener roller 4 circumferential surface is the arc of middle part indent, and every is two straightener rollers 4 in straightener roller 4 to arrange in the left and right sides of tubular metal resonator motion path, and the axial lead of two straightener rollers 4 along tubular metal resonator motion direction dislocation slope setting from top to bottom for two straightener rollers 4 form two symmetrical helices with the tubular metal resonator surface separately and contact.

Therefore, the metal pipe forms two symmetrical spiral lines to contact with the straightening rollers to realize straightening in the advancing process, so that the straightening in the length direction of one section of the metal pipe can be realized only by one pair of straightening rollers, and the metal pipe straightening device is balanced in stress, simple in structure and good in straightening effect. Preferably, each spiral line formed by the contact of the straightening roller and the surface of the metal pipe rotates 180 degrees in the circumferential direction of the surface of the metal pipe; the helix of a pair of straightening rollers forms 360 encirclements in the whole circumference of tubular metal resonator just like this, ensure that the tubular metal resonator surface receives balanced aligning power in circumference, the tubular metal resonator outer wall is by the straightening roller of both sides simultaneously to tubular metal resonator central direction roll extrusion, with the pipe wall flattening of surperficial unevenness, can also guarantee ascending rounding effect in circumference when guaranteeing the straightening effect in the whole length direction of tubular metal resonator, make its aligning and rounding effect reach the best, improve tubular metal resonator crooked condition and surface defect, and then guarantee the reliability of follow-up flaw detection better.

The metal tube feeding and straightening device 3 comprises a reference side plate 5 and an adjusting side plate 6 which are vertically and oppositely arranged at the left side and the right side of a metal tube moving path, and the reference side plate 5 and the adjusting side plate 6 are arranged along the direction of the metal tube moving path and are parallel to each other; the inner side surface of the reference side plate 5 is fixedly provided with a row of straightening roll bottom plates 7 along the moving path direction of the metal pipe, the straightening rolls arranged on the row of straightening roll bottom plates 7 form straightening rolls for reference, the inner side surface of the adjusting side plate 6 and the straightening rolls for reference are just opposite to the row of straightening roll bottom plates 7, and straightening roll adjusting mechanisms are respectively arranged on the row of straightening roll bottom plates 7, the straightening roll adjusting mechanisms are just opposite to the front end of the metal pipe and are provided with straightening rolls 4 for adjustment to form straightening rolls for adjustment, the straightening rolls for reference and the straightening rolls for adjustment are arranged in pairs one by one and are used for realizing the compression and straightening of the metal pipe, and the straightening roll adjusting mechanisms are used for changing the distance between the straightening rolls for adjustment and the metal pipe.

Therefore, the pressing and straightening force of each pair of straightening rollers to the metal pipe can be adjusted at one time by means of the straightening roller adjusting mechanism, the pressing and straightening force is sequentially increased progressively along the advancing direction of the metal pipe, the metal pipe is gradually extruded and straightened for multiple times in the feeding straightening device, the final straightening effect is improved, and the reliability of follow-up flaw detection is better guaranteed. Meanwhile, the straightening roller for the reference on one side of the metal pipe can be used as an adjusting positioning reference, so that the central line of the metal pipe is better ensured to be consistent with the movement path, and the straightness of the metal pipe after final straightening is ensured. Preferably, the contact pressure between the straightening roller for reference and the metal pipe is gradually increased from small to large along the moving direction of the metal pipe. Therefore, the center line of the metal pipe is still consistent with the movement path after the pressing and straightening forces of each pair of straightening rollers are adjusted to be sequentially increased along the movement direction of the metal pipe; better guarantee the straightening effect.

The reference side plate 5 is provided with a driving bevel gear 8 and a driven bevel gear 9 which are meshed with each other corresponding to the reference straightening roller, the driving bevel gear 8 is in transmission connection with a motor for advancing the metal pipe in the metal pipe transmission device 1, and the driven bevel gear 9 is coaxially and fixedly connected with the reference straightening roller.

Wherein, tubular metal resonator feeding straightener 3 includes a straightening case, and the straightening case includes two blocks of curb plates that are located tubular metal resonator movement path left and right sides orientation and two end plates 10 that are located tubular metal resonator movement path orientation of vertical setting, and two blocks of curb plates and two end plates enclose into rectangular frame and fix on the bottom plate, and the opening that supplies the tubular metal resonator to pass through is seted up at two end plate middle parts, and two blocks of curb plates form benchmark curb plate 5 and regulation curb plate 6.

Wherein, still horizontal fixed connection is provided with horizontal stiffener between two blocks of curb plates. Therefore, the strength of the straightening box can be better improved, and the strength of the mutual force applied by each pair of straightening rollers is ensured to be enough to meet the straightening effect.

Wherein, two sections of arc holes 9 'for adjusting are arranged on the bottom plate 7 of the straightening roll, the two sections of arc holes for adjusting are arranged based on the same circle center, the circle center position is horizontally opposite to the center position of the straightening roll on the bottom plate 7 of the straightening roll, bolts are respectively arranged on the side plates corresponding to the two sections of arc holes for adjusting and penetrate through the arc holes 9' for adjusting, and the fixation is realized by nuts.

Wherein, the straightening roll bottom plate 7 is a circular plate, the circle center of the circular plate is the same as the corresponding circle center of the arc-shaped hole for adjustment, an angle scale 11 is arranged on the side plate outside the upper end of the straightening roll bottom plate 7, and an angle pointer line is arranged on the straightening roll bottom plate 7 just opposite to the angle scale 11.

Wherein, the straightening roller adjusting mechanism comprises a circular table 12 which protrudes out of the middle part of the outer side surface of a straightening roller base plate and penetrates through the outer surface of a side plate, the circular table 12 and the side plate are fixedly arranged, the middle part of the circular table 12 penetrates through the circular table 12 and the straightening roller base plate 7 along the axial lead and is provided with a through hole, the outer end of the through hole is provided with a small-diameter section, the inner end of the through hole is provided with a large-diameter section, an adjusting rod 13 is coaxially arranged in the small-diameter section of the through hole and can be rotationally matched, the outer end of the adjusting rod 13 extends out of the circular table 12 and is fixedly provided with an adjusting handle 14, an axial limiting structure for limiting the axial movement of the adjusting rod 13 is arranged between the adjusting rod 13 and the small-diameter section of the through hole, the large-diameter section of the through hole can be connected with the end part of a roller base connecting cylinder 15 in a matching manner in an axial sliding manner, and a circumferential limiting structure for limiting the rotation of the roller base connecting cylinder 15 is arranged between the large-diameter section of the through hole and the roller base connecting cylinder 15, the inner peripheral surface of the end of the roller seat connecting cylinder 15, which is positioned in the through hole, is provided with an internal thread, the internal thread is matched and connected with the external thread on the adjusting rod, and the end of the roller seat connecting cylinder 15, which is far away from the through hole, is provided with a roller seat 16 for installing a straightening roller.

Wherein, adjust the axial limit structure between pole 13 and the through-hole minor diameter section and obtain by adjusting the cooperation of ascending round arch of circumference and recess between pole 13 surface and the through-hole inner wall. The limiting device has the characteristics of simple structure and reliable limiting.

Wherein, the circumference limit structure between through-hole large diameter section and the roller holder connecting cylinder 15 is obtained by a protruding and recess cooperation along axial between the roller holder connecting cylinder 15 surface and the through-hole inner wall. The limiting device has the characteristics of simple structure and reliable limiting.

Wherein, the peripheral surface of the round platform 12 is also vertically penetrated and screwed with a fastening bolt, and the inner end of the fastening bolt is used for contacting with the adjusting rod 13 to realize the compression and fixation. Like this, after rotating adjustment handle rotation regulation and finishing, can rely on fastening bolt to realize the location lock and die, prevent to become flexible.

The metal tube transmission device 1 comprises a metal tube advancing mechanism for driving the metal tube to advance along the axis, and a metal tube rotating mechanism for driving the metal tube to rotate by taking the axis as the center.

Therefore, the metal pipe rotates while advancing, so that the metal pipe is in a rotating advancing state when being straightened, the contact area range of the straightening roller and the metal pipe in unit time is enlarged, and the straightening effect and the straightening efficiency are improved. Simultaneously, the metal tube is with the mode of rotatory marcing for the scope of detecting a flaw of probe in the metal tube device of detecting a flaw is bigger, can rely on fixed probe to realize that the metal tube upwards detects a flaw to the week, avoids lou examining better, has strengthened the reliability and the stability of detecting a flaw, makes to rely on less probe to realize better effect of detecting a flaw.

The metal tube advancing mechanism comprises a pair of advancing rollers 17, the circumferential surfaces of the advancing rollers 17 are provided with inwards concave arc-shaped friction grooves, the friction grooves on the circumferential surfaces of the advancing rollers 17 are oppositely arranged and used for clamping the metal tube in the metal tube advancing mechanism, the two advancing rollers 17 are in transmission connection with a same metal tube advancing motor 18 through a set of advancing roller transmission mechanism, and the metal tube advancing motor is used for driving the two advancing rollers 17 to rotate relatively so as to drive the metal tube to advance.

Therefore, the metal pipe is driven to advance by the pair of advancing rollers rotating synchronously and relatively, the advancing reliability of the metal pipe is guaranteed, the metal pipe is prevented from being deformed to influence follow-up flaw detection due to unbalanced force application, and the flaw detection effect is better guaranteed.

Wherein, the metal tube advancing mechanism also comprises an advancing roller mounting rack 19 with a rectangular frame structure, two advancing roller shafts 20 which are arranged in parallel at intervals are rotatably arranged in the inner cavity of the advancing roller mounting rack 19, the plane of the two advancing roller shafts 20 is vertical to the motion path of the metal tube, the advancing roller 17 is arranged on the advancing roller shafts 20, the advancing roller transmission mechanism comprises the advancing roller shafts 20 and intermediate shafts 21 which are arranged in parallel at intervals with the advancing roller shafts 20, the intermediate shafts 21 are rotatably arranged on the advancing roller mounting rack 19 and are provided with a power input end which extends out of the advancing roller mounting rack 19, the power input ends of the respective intermediate shafts 21 in the two advancing roller transmission mechanisms extend out of different sides of the advancing roller mounting rack 19, the parts of the intermediate shafts in the advancing roller mounting rack 19 are in transmission connection with the corresponding advancing roller shafts 20 through a pair of external gears, and the metal tube advancing worm gears 22 are arranged on the power input ends of the intermediate shafts 21 outside the advancing roller mounting rack 19, the metal tube advancing worm wheel 22 is meshed with a metal tube advancing worm 23 which is arranged on the outer side surface of the advancing roller mounting rack 19 in a direction parallel to the metal tube moving path, one end of each metal tube advancing worm 23 of the two advancing roller transmission mechanisms in the same direction is provided with a gear 24 which is meshed with a power input gear 25, the power input gear 25 is perpendicular to the metal tube moving path and is rotatably mounted on the outer end surface of the advancing roller mounting rack 19, spaces for metal tubes to pass are reserved on the front end surface and the rear end surface of the advancing roller mounting rack 19 in the metal tube moving path direction and the middle of the power input gear 25, and one end of the power input gear 25 is in transmission connection with the metal tube advancing motor 18.

Wherein, still be provided with tubular metal resonator frictional force guiding mechanism in the tubular metal resonator advancing mechanism, tubular metal resonator frictional force guiding mechanism is including a pair of lever driving plate 26 that the interval set up side by side, and lever driving plate 26 is on the plane and the tubular metal resonator advancing direction parallel, and lever driving plate 26 rotationally installs same root on jackshaft 21, and one is installed to the one end that lever driving plate 26 is located advancing roller mounting bracket 19 advance roller 20 and constitute the regulation and use the roller axle that advances, and horizontal fixedly connected with an regulating plate 27 between two lever driving plate 26 rear ends, be provided with the regulation hole of a bar along the tubular metal resonator advancing direction on the regulating plate 27, be provided with an adjusting bolt in the regulation hole perpendicularly, adjusting bolt one end is fixed on advancing roller mounting bracket 19, and adjusting bolt is located the upper and lower surface of regulating plate and respectively has connect a set nut soon (adjusting bolt and set nut do not shown in the picture).

The metal tube rotating mechanism comprises a main transmission box 28, guide sleeves 29 are rotatably arranged at the front end and the rear end of the main transmission box 28 along the advancing path direction of the metal tube, a hollow main shaft 30 is fixedly connected between the guide sleeves 29, the inner cavity of the hollow main shaft 30 forms the advancing path of the metal tube, the front end and the rear end of the advancing roller mounting rack 19 are fixedly arranged on the hollow main shaft 30, a rotating output wheel 31 is fixedly arranged on the hollow main shaft 30, and the rotating output wheel 31 is in transmission connection with a motor for rotating the metal tube.

Wherein, the rotary output wheel 31 is a belt pulley and is in transmission connection with a motor for rotating the metal tube through a belt mechanism; the structure is simple, the cost is low, the implementation is facilitated, and the cost is low. Still further, the motor for rotating the metal tube is arranged below the main transmission box body and is arranged in parallel with the motor for advancing the metal tube, so that the structure is compact, the installation is convenient, and the transmission is reliable.

The metal tube flaw detection device 2 comprises a detection box 32, a through hole is respectively formed in side plates of the detection box 32 along the front side and the rear side of the advancing direction of a metal tube, a set of flaw detection mechanism is respectively installed on the side plates of the front side and the rear side of the detection box 32, the flaw detection mechanism is provided with a flaw detection probe 33 located inside the detection box 32, the flaw detection probe 33 is fixed at the lower end of a vertically arranged adjusting rod 34, the upper end of the adjusting rod 34 is installed on the side plates of the detection box 32, and the probes of the two flaw detection mechanisms are respectively located on two sides of the advancing path of the metal tube and are just opposite to the advancing path of the metal tube.

Like this, among the tubular metal resonator device of detecting a flaw, adopt one left side respectively to set up a probe, cooperate the tubular metal resonator spiral mode of advancing again, adopt the probe fixed and the tubular metal resonator spiral mode of advancing detects a flaw, can rely on simpler structure to realize detecting a flaw to the full surface of tubular metal resonator well, improve the efficiency of detecting a flaw, avoid lou examining, improve the reliability of detecting a flaw.

The device comprises a metal pipe flaw detection device, a plurality of eddy current detection probes, a plurality of ultrasonic detection probes and a plurality of ultrasonic detection probes, wherein the metal pipe flaw detection devices are arranged at intervals along the advancing direction of the metal pipe; in the metal tube flaw detection device provided with the ultrasonic detection probe, a flexible sliding sleeve 35 which is matched with a metal tube to form dynamic seal is arranged in a through hole of a detection box, the detection box is filled with detection liquid to realize ultrasonic water film method flaw detection, and the lower end of the detection box is arranged in a detection liquid recovery container 36.

Therefore, the ultrasonic water film method flaw detection is combined with eddy current flaw detection, and the two flaw detection modes are combined, so that the missed detection is effectively avoided, and the flaw detection accuracy and reliability are further improved. Furthermore, the inner ring wall of the flexible sliding sleeve is provided with a lip made of a circle of flexible plastic, and the lip is used for being in contact with the surface of the metal pipe to realize dynamic sealing.

In the metal tube flaw detection device provided with the ultrasonic detection probe, a glass observation window 37 is also arranged on the side surface of the detection box 32; the liquid level position of the detection liquid can be observed conveniently. Still further, the glass observation window 37 is provided with vertical scale marks, so that the height position of the liquid level can be conveniently and accurately acquired to ensure the flaw detection effect.

In the metal pipe flaw detection device provided with the ultrasonic detection probe, a liquid inlet pipeline (not shown in the figure) is arranged above the detection box 32, a liquid heating container (not shown in the figure) is arranged above the liquid inlet pipeline, and the liquid heating container is connected with a detection liquid recovery container through a water pump and a backflow pipeline.

Thus, the recycling of the detection liquid can be realized. More importantly, simultaneously, the detection liquid flows back into the detection box after being heated by the liquid heating container, micro bubbles in the detection liquid can be well eliminated, the detection effect is greatly prevented from being influenced by the micro bubbles existing in the detection liquid in the detection box, meanwhile, the metal pipe is further combined to advance in a rotary mode, bubbles on the surface of the metal pipe can be prevented from attaching by means of rotation of the metal pipe, and therefore the flaw detection accuracy is greatly improved.

In the metal pipe flaw detection device provided with the ultrasonic detection probe, an overflow groove 38 is arranged on one side above a detection box 32, the overflow side of the overflow groove 38 is connected with the inner cavity of the detection box 32, and the lower end of a liquid inlet pipeline is arranged in the overflow groove. Therefore, the overflow of the overflow groove can be relied on, the fluctuation of the liquid level in the detection box can be better avoided, and the generation of bubbles can be better avoided, so that the better detection effect can be ensured.

The side plate of the detection box is also provided with a probe adjusting device, the probe adjusting device comprises a translational adjusting mechanism, the translational adjusting mechanism comprises a hanging plate 39 which is vertically arranged and fixed above the side plate of the detection box 32, the inner side surface of the hanging plate 39 is vertically attached with a translational base plate 40, the outer side of the translational base plate 40 is provided with an outward translational bulge 41, the outward translational bulge 41 is horizontally and slidably matched in a horizontal sliding groove on the hanging plate 39 through the translational bulge 41, the translational adjusting mechanism further comprises a translational adjusting screw rod 42, the translational adjusting screw rod 42 is parallel to the vertical plane where the corresponding side plate is located and horizontally arranged, the inner end of the translational adjusting screw rod 42 is screwed in a screw hole horizontally arranged on the translational bulge 41, the outer end of the translational adjusting screw rod 42 rotatably penetrates through the hanging plate 39 and is provided with a handle 43 for the translational adjusting screw rod, and a limiting structure for limiting the axial movement of the translational adjusting screw rod 42 is arranged between the translational adjusting screw rod 42 and the hanging plate 39 (implementation) The limit structure can be a circle of bosses and corresponding grooves which are arranged along the circumferential direction of the translational adjusting screw rod); the upper end of the adjustment rod 34 is mounted on a translation base plate 40.

Therefore, the translation adjustment of the translation substrate can be realized by rotating the handle at the outer end of the translation adjusting screw rod, and the probe is driven by the adjusting rod to be close to or far away from the metal tube along the horizontal direction, so that the detection range of the probe can be better adjusted to ensure the detection precision, and the detection position adjustment can also be realized according to the model size of the metal tube. Has the characteristics of simple structure, convenient adjustment, stability and reliability.

A locking mechanism is further arranged between the translation substrate 40 and the hanging plate 39, the locking mechanism comprises a dovetail groove which is formed in the outer side surface of the translation substrate 40 in a concave mode and is along the horizontal direction, a dovetail-shaped protrusion is arranged on the inner side surface of the hanging plate 39 in a matched mode and can horizontally slide corresponding to the dovetail groove, a locking bolt (not shown in the figure) is vertically arranged, and the locking bolt vertically penetrates through the translation substrate 40 from the upper end surface of the translation substrate 40 and abuts against the dovetail-shaped protrusion to achieve abutting locking. Therefore, the locking and fixing can be realized after the horizontal adjustment between the translational baseplate and the hanging plate.

Wherein, the inner side surface of the lower part of the hanging plate 39 is attached to the outer side surface of the upper part of the corresponding side plate, the lower part of the hanging plate 39 is provided with a positioning screw hole along the direction vertical to the side plate, a section of arc-shaped positioning hole taking the positioning screw hole as the circle center is arranged above the positioning screw hole, and bolts (not shown in the figure) are respectively inserted into the arc-shaped positioning hole and the positioning screw hole and penetrate through the side plate to realize the fixed connection of the side plate and the hanging plate 39.

Like this, the fixed connection of link plate and corresponding curb plate has been realized to simple structure, and this connection structure can also conveniently use the location screw to carry out vertical deflection to the link plate as the centre of a circle to adjust simultaneously, and then can realize adjusting the vertical deflection of the probe of regulating stem lower extreme and adjust to adjust the detection range of probe in order to ensure to detect the precision better, and can also realize detecting position according to the tubular metal resonator model size and adjust.

The inner side of the translation substrate 40 is further provided with a vertical coarse adjustment mechanism, the vertical coarse adjustment mechanism comprises a vertical coarse adjustment substrate 44 which is attached to the inner side surface of the translation substrate 40, a vertical sliding protrusion is arranged on the outer side of the vertical coarse adjustment substrate 44 (the direction description is based on the inner and outer directions of the detection box), the vertical sliding protrusion is vertically slidably matched with a vertical sliding groove on the translation substrate 40 in a limiting manner, the vertical coarse adjustment mechanism further comprises a vertical coarse adjustment screw 45, the lower end of the vertical coarse adjustment screw 45 is screwed into a screw hole vertically arranged on the vertical sliding protrusion, the upper end of the vertical coarse adjustment screw 45 rotatably penetrates through the upper surface of the translation substrate and is provided with a handle, and a limiting structure for limiting the axial movement of the vertical coarse adjustment screw 45 is arranged between the vertical coarse adjustment screw 45 and the translation substrate 40 (in the implementation process, the limiting structure can be a circle of bosses and corresponding grooves which are arranged along the circumference of the vertical coarse adjustment screw to obtain a circle ) (ii) a The upper end of the adjustment bar 34 is mounted on a vertical coarse adjustment base 44. In the specific embodiment, the translation substrate is composed of two vertical single plates fixed in parallel, one single plate close to the outside is used for setting a structure matched with the hanging plate, and the other single plate close to the inside is used for setting a structure matched with the vertical coarse adjustment substrate, so that the structure is more conveniently set and installed.

Like this, can rely on the handle of rotating vertical coarse adjusting screw rod upper end, and then realize the preliminary adjustment to position about the regulating stem, and then drive the probe through adjusting the pole and be close to or keep away from the tubular metal resonator along vertical direction to adjust the detection range of probe in order to ensure the detection precision better, and can also realize detecting position according to the tubular metal resonator model size and adjust. Has the characteristics of simple structure, convenient adjustment, stability and reliability.

Wherein, the vertical rough adjusting base plate 44 is also provided with a vertical fine adjusting mechanism, the vertical fine adjusting mechanism comprises a vertical fine adjusting screw rod 46 which is vertically arranged, the upper part of the vertical fine adjusting screw rod 46 is rotatablely arranged on a mounting bulge 47 which transversely extends out of one side of the vertical rough adjusting base plate 44, the upper end of the vertical fine adjusting screw rod 46 extends out of the mounting bulge 47 and is provided with a handle, a limit structure which is used for limiting the vertical fine adjusting screw rod 46 to move along the axial direction is also arranged between the vertical fine adjusting screw rod 46 and the mounting bulge 47, the lower end of the vertical fine adjusting screw rod 46 is in threaded fit in a vertical fine adjusting nut 48 which is horizontally arranged, the vertical fine adjusting nut 48 is sleeved and arranged in a horizontal limit guide sleeve 49, the limit guide sleeve 49 is arranged on the vertical rough adjusting base plate 44, a vertical concave-convex fit structure which is arranged between the inner wall of the limit guide sleeve 49 and the circumferential outer wall of the vertical fine adjusting nut 48 is used for limiting the circumferential rotation of the vertical fine adjusting nut 48, the lower end of the vertical fine adjustment nut 48 is downwards fixedly provided with the adjusting rod 34.

Like this, can rely on the handle of rotating vertical fine tuning screw rod upper end, and then realize the accurate adjustment to position about the regulating stem, make its coarse adjustment first fine tuning again, can adjust the detection range of confirming the probe more accurately in order to ensure the detection precision, and can also realize detecting position according to the tubular metal resonator model size and adjust. Has the characteristics of simple structure, convenient adjustment, stability and reliability.

The vertical rough adjusting base plate 44 is further provided with a horizontal deflection adjusting mechanism, the horizontal deflection adjusting mechanism comprises a limiting guide sleeve 49, worm teeth are arranged on the outer surface of the limiting guide sleeve 49 to form a worm wheel for deflection adjustment, the worm wheel for deflection adjustment is installed in a worm seat 50 fixed on the vertical rough adjusting base plate 44, a horizontally arranged worm 51 for deflection adjustment is further installed on the worm seat 50, the worm 51 for deflection adjustment and the worm wheel for deflection adjustment are meshed in a self-locking mode, and one end of the worm 51 for deflection adjustment extends out of the worm seat 50 and is provided with a handle.

Like this, can rely on the handle that rotates the adjustment of deflecting with the worm outer end, rely on the worm gear transmission pair to drive the horizontal rotation of regulation pole, and then drive the adjustment that the probe realized the horizontal deflection position, can adjust the detection range of confirming the probe more accurately in order to ensure the detection precision, and can also realize detecting position according to tubular metal resonator model size and adjust. Meanwhile, the structure skillfully combines a worm gear transmission pair and a screw nut mechanism together, and realizes the self-rotation limit of a nut in the screw nut mechanism by means of the self-locking function of the worm gear; therefore, the functions of adjusting the up-and-down movement and the autorotation of the adjusting rod are realized by a simple structure. Has the characteristics of simple structure, convenient adjustment, stability and reliability.

Claims

1. A metal tube progressive feeding fine straightening method comprises the step of straightening metal tube feeding by means of straightening rollers arranged in pairs in the process that the metal tube axially moves forward, and is characterized in that a plurality of pairs of horizontally arranged straightening rollers are adopted, and straightening is realized in a mode that the pressing and straightening force of each pair of straightening rollers is adjusted to be sequentially increased along the movement direction of the metal tube;

the metal tube transmission device comprises a metal tube advancing mechanism and a metal tube rotating mechanism, wherein the metal tube advancing mechanism is used for driving the metal tube to advance along the axis, and the metal tube rotating mechanism is used for driving the metal tube to rotate around the axis;

the metal tube advancing mechanism comprises a pair of advancing rollers, the circumferential surfaces of the advancing rollers are provided with inwards concave arc-shaped friction grooves, the friction grooves on the circumferential surfaces of the advancing rollers are oppositely arranged and used for clamping the metal tube in the metal tube, the two advancing rollers are respectively in transmission connection with the same metal tube advancing motor through a set of advancing roller transmission mechanism, and the metal tube advancing motor is used for driving the two advancing rollers to relatively rotate so as to drive the metal tube to advance;

the metal tube advancing mechanism also comprises an advancing roller mounting frame with a rectangular frame structure, two advancing roller shafts which are arranged in parallel at intervals are rotatably arranged in the inner cavity of the advancing roller mounting frame, the planes of the two advancing roller shafts are perpendicular to the motion path of the metal tube, the advancing rollers are arranged on the advancing roller shafts, the advancing roller transmission mechanism comprises the advancing roller shafts and intermediate shafts which are arranged in parallel at intervals with the advancing roller shafts, the intermediate shafts are rotatably arranged on the advancing roller mounting frame and are provided with power input ends extending out of the advancing roller mounting frame, the power input ends of the respective intermediate shafts in the two advancing roller transmission mechanisms extend out of different sides of the advancing roller mounting frame, the parts of the intermediate shafts positioned in the advancing roller mounting frame are in transmission connection with the corresponding advancing roller shafts through a pair of external gears, and worm gears are arranged on the power input ends of the intermediate shafts positioned outside the advancing roller mounting frame, worm wheel and a worm that is on a parallel with tubular metal resonator motion path direction and sets up at the roller mounting bracket lateral surface that advances mesh, and two sets of roller drive mechanism's that advances worm is provided with gear and a power input gear meshing in the one end of equidirectional separately, power input gear perpendicular to tubular metal resonator motion path sets up and rotationally installs on the outer terminal surface of roller mounting bracket that advances, the roller mounting bracket that advances all leaves the space that supplies the tubular metal resonator to pass through along tubular metal resonator motion path direction's front and back both ends terminal surface and power input gear middle part, and the one end and the tubular metal resonator of power input gear advance and connect with motor drive.

2. The method for progressively feeding and finely straightening metal pipes according to claim 1, wherein the metal pipes are straightened by means of a metal pipe feeding and straightening device, the metal pipe feeding and straightening device comprises straightening rollers arranged in pairs, the circumferential surfaces of the straightening rollers are arc-shaped with concave middle portions, two straightening rollers in each pair of straightening rollers are arranged on both sides of the moving path of the metal pipes in the left and right directions, the metal pipe feeding and straightening device further comprises a reference side plate and an adjusting side plate which are vertically and oppositely arranged on the left and right sides of the moving path of the metal pipes, and the reference side plate and the adjusting side plate are arranged along the moving path of the metal pipes and are parallel to each other; the inner side surface of the reference side plate is fixedly provided with a row of straightening roll base plates along the movement path direction of the metal pipe, the straightening rolls arranged on the row of straightening roll base plates form straightening rolls for the reference, the inner side surface of the adjusting side plate and the reference straightening rolls are just opposite to the row of straightening roll base plates, and straightening roll adjusting mechanisms are respectively arranged on the row of straightening roll base plates, the straightening roll adjusting mechanisms are just opposite to the front end of the metal pipe and are provided with straightening rolls for forming straightening rolls for adjustment, the straightening rolls for the reference and the straightening rolls for adjustment are arranged in pairs one by one and are used for realizing compression and straightening of the metal pipe, and the straightening roll adjusting mechanisms are used for changing the distance between the straightening rolls for adjustment and the metal pipe.

3. The method for finely straightening a progressive metal pipe feed according to claim 2, wherein a driving helical gear and a driven helical gear which are engaged with each other are provided on the reference side plate corresponding to the reference straightening roll, the driving helical gear and the metal pipe advance are drivingly connected by a motor, and the driven helical gear and the reference straightening roll are coaxially and fixedly connected.

4. The progressive metal pipe feeding fine straightening method according to claim 2, wherein the progressive metal pipe fine straightening device comprises a straightening box, the straightening box comprises two side plates which are vertically arranged and are positioned in the left and right directions of a metal pipe moving path and two end plates which are vertically arranged and are positioned in the direction of the metal pipe moving path, the two side plates and the two end plates form a rectangular frame and are fixed on a bottom plate, an opening for a metal pipe to pass through is formed in the middle of each of the two end plates, and the two side plates form the reference side plate and the adjusting side plate.

5. The progressive metal pipe feeding fine straightening method according to claim 2, wherein two sections of arc-shaped holes for adjustment are arranged on the bottom plate of the straightening roll, the two sections of arc-shaped holes for adjustment are arranged based on the same circle center, the circle center position is horizontally opposite to the center position of the straightening roll on the bottom plate of the straightening roll, bolts are arranged on the side plates corresponding to the two sections of arc-shaped holes for adjustment respectively, penetrate through the arc-shaped holes for adjustment, and are fixed by nuts.

6. The progressive metal pipe feeding fine straightening method as claimed in claim 5, wherein the bottom plate of the straightening roll is a circular plate, the circle center of the circular plate is the same as the corresponding circle center of the arc-shaped hole for adjustment, an angle scale is arranged on the side plate outside the upper end of the bottom plate of the straightening roll, and an angle pointer line is arranged on the bottom plate of the straightening roll and is opposite to the angle scale.

7. The progressive feeding fine straightening method for the metal pipe according to claim 2, wherein the straightening roller adjusting mechanism comprises a circular table which protrudes outwards from the middle part of the outer side surface of the bottom plate of the straightening roller and penetrates through the outer surface of the side plate, the circular table and the side plate are fixedly arranged, a through hole is formed in the middle part of the circular table and penetrates through the circular table and the bottom plate of the straightening roller along the axial lead, a small-diameter section is arranged at the outer end of the through hole, a large-diameter section is arranged at the inner end of the through hole, an adjusting rod is coaxially and rotatably matched in the small-diameter section of the through hole, the outer end of the adjusting rod extends out of the circular table and is fixed with an adjusting handle, an axial limiting structure for limiting the axial movement of the adjusting rod is arranged between the adjusting rod and the small-diameter section of the through hole, the large-diameter section of the through hole is axially slidably matched and connected with the end part of a roller base connecting cylinder, and a circumferential limiting structure for limiting the rotation of the roller base connecting cylinder is arranged between the large-diameter section of the through hole and the roller base connecting cylinder, the inner peripheral surface of the end of the roller seat connecting cylinder located in the through hole is provided with an internal thread, the internal thread is matched and connected with an external thread on the adjusting rod, and the end of the roller seat connecting cylinder far away from the through hole is provided with a roller seat used for installing a straightening roller.

8. The progressive metal pipe feeding fine straightening method according to claim 1, wherein the metal pipe rotating mechanism comprises a main transmission box body, guide sleeves are rotatably arranged at the front end and the rear end of the main transmission box body along the advancing path direction of the metal pipe, a hollow main shaft is fixedly connected between the guide sleeves, the guide sleeves and the inner cavity of the hollow main shaft form the advancing path of the metal pipe, the front end and the rear end of the advancing roller mounting frame are fixedly arranged on the hollow main shaft, a rotating output wheel is further fixedly arranged on the hollow main shaft, and the rotating output wheel is in transmission connection with the metal pipe through a motor.