Production equipment and method for stainless steel pipe

Abstract

The invention relates to the technical field of steel pipe production equipment, in particular to stainless steel pipe production equipment which further comprises a supporting assembly, the supporting assembly is used for placing a steel pipe and comprises two supporting frames arranged in parallel, the supporting frames are supported by first electric push rods, and the height of the supporting frames is adjusted. Supporting discs are fixedly connected to the outer side of the top end of the supporting frame, a gap for containing steel pipes is formed between the two rows of supporting discs, rotating balls are rotationally connected to the inner sides of the supporting discs, a water spraying ring is arranged on the right side of the supporting assembly, concentric supporting rings are fixedly connected to the outer side of the water spraying ring, the inner sides of the supporting rings are hollow, and the steel pipes are placed on the supporting assembly. The expanding and supporting assembly extends into the inner side of the steel pipe and supports the inner side of the steel pipe, the supporting assembly comprises two supporting frames arranged in parallel, the steel pipe is supported by a rotating ball rotationally connected with the inner side of a supporting disc, the rotating ball can rotate at will, and therefore friction generated by relative movement of the rotating ball and the steel pipe is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of steel pipe production equipment, and in particular to production equipment and method for stainless steel pipes. Background Art

[0002] Hot-rolled steel pipe is a kind of seamless steel pipe. Hot-rolled steel pipe can destroy the casting structure of steel ingot, refine the grain of steel, and eliminate the defects of microstructure, so as to make the steel structure dense and improve the mechanical properties. This improvement is mainly along the rolling direction, so that the steel is no longer isotropic to a certain extent. The bubbles, cracks and looseness formed during casting can also be welded under high temperature and pressure, and the performance of the steel pipe is better.

[0003] When the steel pipe is cast, under the action of high temperature and air, a layer of iron oxide scale will be formed on its surface. The layer of iron oxide scale formed on the surface will be hot-rolled inside the steel pipe during the production process of fixed diameter reduction. The iron oxide scale will weaken the corrosion resistance, weldability and mechanical properties of the finished steel pipe. Before the high-temperature steel pipe enters the fixed diameter reduction equipment, a circular high-pressure water gun will be used to flush away the iron oxide scale formed on the surface of the steel pipe to ensure that there is no iron oxide scale during hot rolling.

[0004] A water spray structure for removing iron oxide scale for hot rolling production equipment of steel pipes with application number 202010017351.9 records a water spray structure, which increases the number of water spray heads and makes the water sprayed by the high-pressure spray heads tangent to the high-temperature steel pipe by tilting the angle, so as to ensure that the water sprayed by the high-pressure spray heads can completely cover the surface of the high-temperature steel pipe while reducing the diffusion range, and at the same time, it can also make the difference in the water spray pressure on the surface of the high-temperature steel pipe small, so as to ensure the performance of the surface of the high-temperature steel pipe to remove iron oxide scale by water pressure; Although the above-mentioned method of increasing the number of nozzles and changing the angle can increase the uniformity and range of water spraying, it is still difficult to achieve uniform and powerful spraying when there is no relative movement between the water spray ring and the high-temperature steel pipe. There is still a problem of small water impact force at a position far away from the extension line of the nozzle on the surface of the steel pipe. In addition, when facing steel pipes of different diameters, it is impossible to make the extension line of the nozzle tangent to the surfaces of steel pipes of different diameters.

[0005] Therefore, in order to solve the above problems, a production device and method for stainless steel pipes are proposed. Summary of the invention

[0006] The purpose of the present invention is to provide production equipment and methods for stainless steel pipes to solve the problem raised in the above background technology that "although the above-mentioned method of increasing the number of nozzles and changing the angle can increase the uniformity and range of water spraying, it is still difficult to achieve uniform and powerful spraying when there is no relative movement between the water spray ring and the high-temperature steel pipe. There is still a problem of small water impact force at the position of the steel pipe surface far away from the extension line of the nozzle, and when facing steel pipes of different diameters, it is impossible to make the extension line of the nozzle tangent to the surface of steel pipes of different diameters."

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a production device for stainless steel pipes, comprising a first motor supported by a support plate, a fixed plate and a water spray ring, the production device also comprising a support assembly, the support assembly is used to place the steel pipe, the support assembly comprises two parallel support frames, the support frames are supported by a first electric push rod and can achieve height adjustment, the top outer side of the support frame is fixedly connected with a support plate, there is a gap between the two rows of support plates for placing the steel pipe, and the inner side of the support plate is rotatably connected with a rotating ball; The water spray ring is arranged on the right side of the support assembly, the outer side of the water spray ring is fixedly connected with a concentric support ring, the inner side of the support ring is hollow, the bottom end of the support ring is connected with a high-pressure water pipe, and the inner side of the water spray ring is provided with a nozzle connected with the high-pressure water pipe; A screw is spirally connected to the inner side of the fixed plate, and the inner side of the screw is hollow. The extension line of the screw is coaxial with the center line of the water spray ring. The end of the main shaft of the first motor is fixedly connected to an external hexagonal rod, and the outer side of the external hexagonal rod is slidingly connected to the inner side of the screw to achieve torque transmission. The right end of the screw is fixedly connected to an expansion component, which can extend into the inner side of the steel pipe and drive the steel pipe to rotate.

[0008] Under the above setting, the present invention realizes the removal of iron oxide scale on the surface of the steel pipe through the nozzle inside the water spray ring; When in use, the steel pipe is placed on the support assembly, the expansion assembly extends into the inner side of the steel pipe and supports the inner side of the steel pipe, the support assembly includes two support frames arranged in parallel, the steel pipe is supported by a rotating ball connected to the inner side of the support plate, and the rotating ball can rotate arbitrarily, thereby avoiding friction caused by the relative movement of the rotating ball and the steel pipe, wherein the rotating ball should be small enough to ensure that the contact point of the rotating ball and the steel pipes of different diameters is infinitely close to reduce the calculation error when the radius r of the steel pipe, wherein, in the initial state, the contact point of the rotating ball and the steel pipe is consistent with the limit height of the top of the rotating wheel; The present invention can rotate the steel pipe when removing the oxidized iron scale, thereby greatly increasing the spray contact range between the nozzle and the surface of the steel pipe, and reducing the number of nozzles; The steel pipe moves forward and rotates on the support assembly in the following manner: the first motor rotates, the rotation of the first motor drives the outer hexagonal rod to rotate, and the screw engaged with the outer hexagonal rod rotates synchronously, the rotation of the screw causes the screw itself to rotate and move forward at the same time, and the screw drives the steel pipe to move forward and rotate to the right through the expansion support assembly, and when the steel pipe passes through the water spray ring, the iron oxide scale can be removed; Preferably, the device also includes a first telescopic rod, the upper movable end of the first telescopic rod is rotatably connected to a rotating wheel, after the steel pipe is supported by the supporting assembly, the top end of the rotating wheel can upwardly contact the bottom end of the steel pipe, the first telescopic rod includes an outer rod and a piston slidably connected therein, one end of the piston is fixedly connected to an inner rod, the inner side of the outer rod is fixedly connected to a position sensor, the piston slides on the position sensor, a spring is provided on the inner side of the outer rod, and the two ends of the spring are respectively fixedly connected to one end of the piston and the inner side of the bottom end of the outer rod.

[0009] Under the above setting, the present invention is provided with a rotating wheel, which will contact the bottom end of the steel pipe upwards under the elastic action of the first telescopic rod, and the position sensor is used to obtain the descending distance of the top end of the rotating wheel after being pressed by the steel pipe; Preferably, the inner side of the water spray ring is evenly rotatably connected to a connecting ball, the inner side of the connecting ball is fixedly connected to a hollow tube, the outer side of the water spray ring is rotatably connected to a second telescopic rod via a hinge, the other end of the second telescopic rod is rotatably connected to the outer side of the hollow tube via a hinge, the second telescopic rod has a similar structure to the first telescopic rod, and is used to achieve angle adjustment of the hollow tube in the opposite direction.

[0010] Preferably, one end of the hollow tube facing the inner side of the water spray ring is connected with a spray head, and one end of the hollow tube extends to the outer side of the water spray ring. The end of the hollow tube facing the outer side of the water spray ring is connected with the inner side of the support ring through a hose.

[0011] Under the above settings, the present invention can remove iron oxide scale from steel pipes within a certain diameter range, and make the center line of the steel pipe coincide with the center line of the water spray ring. When facing steel pipes with different diameters, the water spraying path is that the water of the high-pressure water pipe enters the support ring, the hose, and the hollow pipe, and then is sprayed out by the nozzle. The nozzle angle in the present invention can be adjusted according to the different diameters of the steel pipe, so that the extension line of the nozzle remains tangent to the surface of the steel pipes with different diameters, thereby obtaining the best iron oxide removal effect. When tangent, the high-pressure water sprayed by the nozzle can coincide with the edge tangent of the cracked iron oxide scale to the greatest extent, thereby facilitating the high pressure to wash off the iron oxide scale; Preferably, there is an even number of connecting balls, and one end of the multiple hollow tubes facing the inner side of the water spray ring is fixedly connected to the nozzle or the elastic metal strip, the nozzle is connected to the hollow tube, and the nozzles or elastic metal strips on the multiple hollow tubes are arranged at intervals in sequence. The hollow tube connected to the nozzle is connected to the inner side of the support ring through a hose, and the elastic metal strip is rack-shaped on the side facing the steel pipe.

[0012] Under the above-mentioned setting, the present invention can make the elastic metal strip contact with the iron oxide scale and generate friction while maintaining the flushing of the nozzle, further increasing the removal effect of the cracked iron oxide scale. The rack-shaped setting at one end of the elastic metal strip can further increase the scraping force when the elastic metal strip contacts the iron oxide scale, which is convenient for removing the cracked iron oxide scale. The elastic metal strip is made of steel sheet and has elasticity, which prevents the elastic metal strip from being overly pressed against the surface of the steel pipe and causing wear. Preferably, the outer side of the water spray ring is rotatably connected to a swivel through a slide groove, one end of the swivel is fixedly connected to a connecting rod, and a pull rope is fixedly connected between the connecting rod and the hollow tube. When the swivel rotates, the pull rope can be used to pull and change the direction of the hollow tube so that the spray direction of the nozzle is tangent to the surface of the steel pipe.

[0013] Preferably, a second motor is fixedly connected to the outer side of the water spray ring, a gear is fixedly connected to the output end of the second motor, the outer side of the rotating ring is in the shape of a gear ring, and the gear is meshed with the outer side of the rotating ring.

[0014] The angle adjustment method of the nozzle or the elastic metal strip is that the second motor rotates, and the second motor drives the gear at the end thereof to rotate. The gear is not shown. The rotation of the gear drives the rotating ring to rotate. The rotation of the rotating ring drives the hollow tube to tilt through the connecting rod and the pull rope, thereby realizing the angle adjustment of the nozzle or the elastic metal strip, so that it is tangent to the surface of the steel pipe with different diameters. Preferably, the expansion support assembly includes a left cylinder and a right cylinder, the left cylinder is fixedly connected to the right end of the screw rod, the inner side of the left cylinder is fixedly connected to a second electric push rod, the movable end of the second electric push rod is fixedly connected to the left end of the right cylinder, the right side of the left cylinder and the left side of the right cylinder are both connected to connecting rods through hinge rotation, the connecting rod on the left cylinder and the connecting rod on the right cylinder on the same side are connected to the same support rod through hinge rotation, and the outer side of the support rod is fixedly connected to a top rod for supporting the inside of the steel pipe.

[0015] The expansion component is used to connect the screw rod and steel pipes of different diameters. The connection method is: the left cylinder and the right cylinder are extended into the inner side of the steel pipe, and then the second electric push rod is retracted, and the right cylinder approaches the left cylinder. During the approaching process, the connecting rod gradually tilts, which makes the support rod and the top rod support the steel pipe, so as to realize the advancement and rotation of the steel pipe. A method for producing a stainless steel pipe, using the device as claimed in claim 8, comprising the steps of: Step 1: Obtain the outer edge radius r of the steel pipe through the support assembly; Step 2: The movable end of the first electric push rod rises. According to the outer edge radius r of the steel pipe, the center line of the steel pipe is overlapped with the center extension line of the screw and the center extension line of the water spray ring. The height of the center line of the steel pipe is equal to the height of the top of the runner plus the radius r. When adjusting, the height of the top of the runner can be used as a reference for adjustment. The height of the top of the runner is obtained by the position sensor. Step 3: The expansion and support assembly props up the steel pipe, and the first motor rotates to rotate the steel pipe and enter the inner side of the support ring; Step 4: According to the diameter of the steel pipe obtained in step 1, change the angle of the nozzle so that the extension line of the nozzle is on the tangent line of the steel pipe surface.

[0016] Preferably, the method for the support assembly to obtain the outer edge radius r of the steel pipe is: S1: The line connecting the contact points of the two rotating balls and the steel pipe on the same plane in the front and rear rows is the x-axis, and the vertical line at the midpoint of the line is the y-axis. The coordinates of the contact points of the two rotating balls and the steel pipe are (-a, 0) and (a, 0), the contact point between the top of the rotating wheel and the bottom of the steel pipe is (0, c), and the coordinates of the center of the steel pipe are (0, y); S2: According to the standard equation of a circle, we have r 2 = (yc) 2 =a 2 +y 2 ; S3: According to S2, we can get y , c is a negative number; S4: replace y in S3 Substituting into r=yc, we have r= -c, because a is a constant, c=d+m, where d is the ordinate of the maximum extension height of the top of the runner in the coordinate system, which is a constant 0, that is, the maximum extension height of the top of the runner in the coordinate system is the coordinate center point, and m is the ordinate of the top of the runner (11) in the coordinate system after being compressed, and m is obtained by the position sensor, thereby obtaining the length of the radius r of the steel pipe.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The production equipment for stainless steel pipes of the present invention realizes the removal of iron oxide scale on the surface of the steel pipe by the nozzle on the inner side of the water spray ring. When in use, the steel pipe is placed on the support assembly, and the expansion assembly extends into the inner side of the steel pipe and supports the inner side of the steel pipe. The support assembly includes two parallel support frames. The steel pipe is supported by a rotating ball rotatably connected to the inner side of the support plate. The rotating ball can be rotated arbitrarily to avoid friction caused by the relative movement of the rotating ball and the steel pipe. The rotating ball should be small enough to ensure that the contact point between the rotating ball and the steel pipes of different diameters is infinitely close to reduce the calculation error when the radius r of the steel pipe is used. In the initial state, the contact point between the rotating ball and the steel pipe is consistent with the limit height of the top of the wheel.

[0018] 2. The production equipment for stainless steel pipes of the present invention can rotate the steel pipe when removing oxidized iron scale, thereby greatly increasing the spray contact range between the nozzle and the surface of the steel pipe, and can reduce the number of nozzles. The steel pipe moves forward and rotates on the support assembly in the following manner: the first motor rotates, and the rotation of the first motor drives the outer hexagonal rod to rotate, and the screw engaged with the outer hexagonal rod rotates synchronously. The rotation of the screw causes the screw itself to rotate and move forward at the same time, and the screw drives the steel pipe to move forward and rotate to the right through the expansion support assembly. When the steel pipe passes through the water spray ring, the oxidized iron scale can be removed.

[0019] 3. The production equipment for stainless steel pipes of the present invention is provided with a rotating wheel, which will come into conflict with the bottom end of the steel pipe upwards under the elastic action of the first telescopic rod, and the provided position sensor is used to obtain the descending distance of the top end of the rotating wheel after being pressed by the steel pipe.

[0020] 4. The production equipment for stainless steel pipes can remove iron scale from steel pipes within a certain diameter range, and make the center line of the steel pipe coincide with the center line of the water spray ring. When facing steel pipes with different diameters, the water spray path is that the water of the high-pressure water pipe enters the support ring, the hose, and the hollow pipe, and then is sprayed out by the nozzle. The nozzle angle of the present invention can be adjusted according to the different diameters of the steel pipe, so that the extension line of the nozzle remains tangent to the surface of the steel pipe with different diameters, thereby obtaining the best effect of removing iron scale. When tangent, the high-pressure water sprayed from the nozzle and the edge tangent of the cracked iron scale can coincide to the greatest extent, thereby facilitating the high pressure to flush the iron scale off.

[0021] 5. The production equipment for stainless steel pipes of the present invention can make the elastic metal strip contact with the oxidized iron sheet and generate friction while maintaining the flushing of the nozzle, thereby further increasing the removal effect of the cracked oxidized iron sheet. The rack-shaped arrangement at one end of the elastic metal strip can further increase the scraping force when the elastic metal strip contacts the oxidized iron sheet, thereby facilitating the removal of the cracked oxidized iron sheet. The elastic metal strip is made of steel sheet and has elasticity, thereby preventing the elastic metal strip from being overly pressed against the surface of the steel pipe and causing wear.

[0022] 6. The production equipment for stainless steel pipes, the angle adjustment method of the nozzle or the elastic metal strip is that the second motor rotates, and the second motor drives the gear at the end thereof to rotate. The gear is not shown. The rotation of the gear drives the rotating ring to rotate. The rotation of the rotating ring drives the hollow pipe to tilt through the connecting rod and the pull rope, thereby realizing the angle adjustment of the nozzle or the elastic metal strip so that it is tangent to the surface of the steel pipe with different diameters.

[0023] 7. The production equipment for stainless steel pipes obtains the outer edge radius r of the steel pipe through the support assembly; the movable end of the first electric push rod rises, and according to the outer edge radius r of the steel pipe, the center line of the steel pipe is coincided with the center extension line of the screw and the center extension line of the water spray ring. The height of the center line of the steel pipe is equal to the height of the top of the rotor plus the radius r. When adjusting, it can be adjusted based on the height of the top of the rotor as a reference. The height of the top of the rotor is obtained by the position sensor; the expansion support assembly props up the steel pipe, and the first motor rotates to rotate the steel pipe and enter the inner side of the support ring; according to the obtained diameter of the steel pipe, the angle of the nozzle is changed so that the extension line of the nozzle is on the tangent of the steel pipe surface.

[0024] 8. The method for the support assembly to obtain the outer radius r of the steel pipe in the production equipment for stainless steel pipes is as follows: the line connecting the contact points of the two rotating balls and the steel pipe on the same plane in the front and rear rows is the x-axis, the vertical line at the midpoint of the line is the y-axis, the coordinates of the contact points of the two rotating balls and the steel pipe are (-a, 0) and (a, 0), the contact point between the top of the rotating wheel and the bottom of the steel pipe is (0, c), and the coordinates of the center of the steel pipe are (0, y); according to the standard equation of a circle, then r 2 = (yc) 2 =a 2 +y 2 ; You can get y , c is a negative number, and y Substituting into r=yc, we have r= -c, since a is a constant, the length of the radius r of the steel pipe is obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention; Figure 2 This is a schematic diagram of the outer ring structure at the water spray ring of the present invention; Figure 3 It is a schematic diagram of the installation structure of the support ring of the present invention from a side view; Figure 4 It is a schematic diagram of the installation structure of the elastic metal strip of the present invention from a side view; Figure 5 For the present invention Figure 3 Schematic diagram of the structure at A in FIG. Figure 6It is a schematic diagram of the installation structure of the support ring of the present invention; Figure 7 This is a schematic diagram of the explosion structure at the outer hexagonal rod of the present invention; Figure 8 This is a schematic diagram of the appearance structure of the elastic metal strip of the present invention; Fig. 9 It is a schematic diagram of the installation structure of the expansion support assembly of the present invention; Fig.10 It is a schematic diagram of the cross-sectional installation structure of the first telescopic rod of the present invention.

[0026] In the figure: 1. support plate; 2. first motor; 3. outer hexagonal rod; 4. screw; 5. fixing plate; 6. expansion support assembly; 61. left cylinder; 62. right cylinder; 63. second electric push rod; 64. connecting rod; 65. support rod; 66. top rod; 7. steel pipe; 8. support frame; 9. support plate; 10. first telescopic rod; 11. rotating wheel; 12. supporting ring; 13. high-pressure water pipe; 14. water spraying ring; 15. connecting ball; 16. hollow pipe; 17. rotating ring; 18. connecting rod; 19. second motor; 20. elastic metal strip; 21. rotating ball; 22. nozzle; 23. second telescopic rod; 24. pull rope; 25. first electric push rod; 26. hose; 101. Outer rod; 102. Spring; 103. Inner rod; 104. Piston; 105. Position sensor. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Example 1 See also Figure 1-Figure 3 and Figure 5-Figure 10 , the present invention provides a technical solution: Production equipment and method for stainless steel pipes, production equipment for stainless steel pipes, including a first motor 2 supported by a support plate 1, a fixed plate 5 and a water spray ring 14, the production equipment also includes a support assembly, the support assembly is used to place a steel pipe 7, the support assembly includes two parallel support frames 8, the support frame 8 is supported by a first electric push rod 25 and realizes height adjustment, the top outer side of the support frame 8 is fixedly connected to a support plate 9, there is a gap between the two rows of support plates 9 for placing the steel pipe 7, and the inner side of the support plate 9 is rotatably connected to a rotating ball 21; The water spray ring 14 is arranged on the right side of the support assembly, the outer side of the water spray ring 14 is fixedly connected with a concentric support ring 12, the inner side of the support ring 12 is hollow, the bottom end of the support ring 12 is connected with a high-pressure water pipe 13, and the inner side of the water spray ring 14 is provided with a nozzle 22 connected with the high-pressure water pipe 13; The inner side of the fixed plate 5 is spirally connected to a screw rod 4, the inner side of the screw rod 4 is hollow, the extension line of the screw rod 4 is coaxial with the center line of the water spray ring 14, the end of the main shaft of the first motor 2 is fixedly connected to an external hexagonal rod 3, the outer side of the external hexagonal rod 3 is slidingly connected to the inner side of the screw rod 4 to realize torque transmission, and the right end of the screw rod 4 is fixedly connected to an expansion component 6, which can extend into the inner side of the steel pipe 7 and drive the steel pipe 7 to rotate.

[0029] Under the above arrangement, the present invention removes the iron oxide scale on the surface of the steel pipe 7 through the nozzle 22 inside the water spray ring 14; When in use, the steel pipe 7 is placed on the support assembly, and the expansion assembly 6 extends into the inner side of the steel pipe 7 and supports the inner side of the steel pipe 7. The support assembly includes two support frames 8 arranged in parallel. The steel pipe 7 is supported by a rotating ball 21 rotatably connected to the inner side of the support plate 9. The rotating ball 21 can rotate arbitrarily, thereby avoiding friction caused by the relative movement between the rotating ball 21 and the steel pipe 7. The rotating ball 21 should be small enough to ensure that the contact point between the rotating ball 21 and the steel pipe 7 of different diameters is infinitely close to reduce the calculation error of the radius r of the steel pipe 7. In the initial state, the contact point between the rotating ball 21 and the steel pipe 7 is consistent with the limit height of the top of the rotating wheel 11. In the present invention, when removing the iron oxide scale, the steel pipe 7 can rotate, thereby greatly increasing the spray contact range between the nozzle 22 and the surface of the steel pipe 7, and reducing the number of nozzles 22; The steel pipe 7 moves forward and rotates on the support assembly in the following manner: the first motor 2 rotates, the rotation of the first motor 2 drives the outer hexagonal rod 3 to rotate, the screw 4 engaged with the outer hexagonal rod 3 rotates synchronously, the rotation of the screw 4 causes the screw 4 to rotate and move forward at the same time, the screw 4 drives the steel pipe 7 to move forward and rotate rightward through the expansion assembly 6, and when the steel pipe 7 passes through the water spray ring 14, the iron oxide scale can be removed; Specifically, the device also includes a first telescopic rod 10, the upper movable end of the first telescopic rod 10 is rotatably connected to a rotating wheel 11, after the steel pipe 7 is supported by the supporting assembly, the top end of the rotating wheel 11 can upwardly contact the bottom end of the steel pipe 7, the first telescopic rod 10 includes an outer rod 101 and a piston 104 slidably connected thereto, one end of the piston 104 is fixedly connected to an inner rod 103, the inner side of the outer rod 101 is fixedly connected to a position sensor 105, the piston 104 slides on the position sensor 105, a spring 102 is provided on the inner side of the outer rod 101, the two ends of the spring 102 are respectively fixedly connected to one end of the piston 104 and the inner side of the bottom end of the outer rod 101, the second telescopic rod 23 has a similar structure to the first telescopic rod 10, and is used to realize the angle adjustment of the hollow tube 16 in the opposite direction.

[0030] Under the above setting, the present invention is provided with a rotating wheel 11, which will contact the bottom end of the steel pipe 7 upwards under the elastic action of the first telescopic rod 10, and the position sensor 105 is used to obtain the descending distance of the top end of the rotating wheel 11 after being pressed by the steel pipe 7; Specifically, the inner side of the water spray ring 14 is evenly connected to the connecting ball 15, the inner side of the connecting ball 15 is fixedly connected to the hollow tube 16, the outer side of the water spray ring 14 is connected to the second telescopic rod 23 through a hinge, and the other end of the second telescopic rod 23 is connected to the outer side of the hollow tube 16 through a hinge.

[0031] Specifically, one end of the hollow tube 16 facing the inner side of the water spray ring 14 is connected to the nozzle 22 , and one end of the hollow tube 16 extends to the outer side of the water spray ring 14 . The end of the hollow tube 16 facing the outer side of the water spray ring 14 is connected to the inner side of the support ring 12 through a hose 26 .

[0032] Under the above settings, the present invention can remove iron oxide scale from steel pipes 7 within a certain diameter range, and make the center line of the steel pipe 7 coincide with the center line of the water spray ring 14. When facing steel pipes 7 with different diameters, the water spraying path is that the water of the high-pressure water pipe 13 enters the support ring 12, the hose 26, and the hollow tube 16, and then is sprayed out by the nozzle 22. The angle of the nozzle 22 in the present invention can be adjusted according to the different diameters of the steel pipe 7, so that the extension line of the nozzle 22 remains tangent to the surface of the steel pipe 7 with different diameters, thereby obtaining the best effect of removing iron oxide scale. When tangent, the high-pressure water sprayed by the nozzle 22 can coincide with the edge tangent of the cracked iron oxide scale to the greatest extent, thereby facilitating the high pressure to flush the iron oxide scale off; Specifically, the outer side of the water spray ring 14 is rotatably connected to a swivel 17 through a slide groove, one end of the swivel 17 is fixedly connected to a connecting rod 18, and a pull rope 24 is fixedly connected between the connecting rod 18 and the hollow tube 16. When the swivel 17 rotates, the pull rope 24 can be used to pull and change the direction of the hollow tube 16 so that the spray direction of the nozzle 22 is tangent to the surface of the steel pipe 7.

[0033] Specifically, the outer side of the water spray ring 14 is fixedly connected with the second motor 19 , the output end of the second motor 19 is fixedly connected with a gear, the outer side of the rotating ring 17 is in a gear ring shape, and the gear is meshed with the outer side of the rotating ring 17 .

[0034] The angle adjustment method of the nozzle 22 or the elastic metal strip 20 is that the second motor 19 rotates, and the second motor 19 drives the gear at the end thereof to rotate. The gear is not shown. The rotation of the gear drives the rotating ring 17 to rotate. The rotation of the rotating ring 17 drives the hollow tube 16 to tilt through the connecting rod 18 and the pull rope 24, thereby achieving the angle adjustment of the nozzle 22 or the elastic metal strip 20, so that it is tangent to the surface of the steel pipe 7 with different diameters; Specifically, the expansion support assembly 6 includes a left cylinder 61 and a right cylinder 62, the left cylinder 61 is fixedly connected to the right end of the screw rod 4, the inner side of the left cylinder 61 is fixedly connected to a second electric push rod 63, the movable end of the second electric push rod 63 is fixedly connected to the left end of the right cylinder 62, the right side of the left cylinder 61 and the left side of the right cylinder 62 are both connected to a connecting rod 64 through a hinge rotation, the connecting rod 64 on the left cylinder 61 and the connecting rod 64 on the right cylinder 62 on the same side are connected to the same support rod 65 through a hinge rotation, and the outer side of the support rod 65 is fixedly connected to a top rod 66 for supporting the inside of the steel pipe 7.

[0035] The expansion support assembly 6 is used to realize the connection between the screw rod 4 and the steel pipes 7 of different diameters. The connection method is: the left cylinder 61 and the right cylinder 62 are extended into the inner side of the steel pipe 7, and then the second electric push rod 63 is retracted, and the right cylinder 62 approaches the left cylinder 61. In the process of approaching, the connecting rod 64 gradually tilts, which causes the support rod 65 and the top rod 66 to support the steel pipe 7, thereby realizing the advancement and rotation of the steel pipe 7.

[0036] Example 2 This embodiment is a further improvement of the embodiment 1. The same parts as the embodiment 1 will not be described in detail. The difference is that: Figure 1-10 , Specifically, there is an even number of connecting balls 15, and one end of a plurality of hollow tubes 16 facing the inner side of the water spray ring 14 is fixedly connected to a nozzle 22 or an elastic metal strip 20, and the nozzle 22 is connected to the hollow tube 16. The nozzles 22 or the elastic metal strip 20 on the plurality of hollow tubes 16 are arranged at intervals in sequence. The hollow tube 16 connected to the nozzle 22 is connected to the inner side of the support ring 12 through a hose 26, and the elastic metal strip 20 is rack-shaped on the side facing the steel pipe 7.

[0037] Under the above-mentioned setting, the present invention can make the elastic metal strip 20 contact with the iron oxide scale and generate friction while maintaining the nozzle flushing, thereby further increasing the removal effect of the cracked iron oxide scale. The rack-shaped setting at one end of the elastic metal strip 20 can further increase the scraping force when the elastic metal strip 20 contacts the iron oxide scale, thereby facilitating the removal of the cracked iron oxide scale. The elastic metal strip 20 is made of steel sheet and has elasticity, thereby preventing the elastic metal strip 20 from being overly pressed against the surface of the steel pipe 7 and causing wear.

[0038] The present invention also discloses a production method for a stainless steel pipe, the steps of which are: Step 1: Obtain the outer edge radius r of the steel pipe 7 through the support assembly; Step 2: The movable end of the first electric push rod 25 rises, and according to the outer edge radius r of the steel pipe 7, the center line of the steel pipe 7 is overlapped with the center extension line of the screw 4 and the center extension line of the water spray ring 14. The height of the center line of the steel pipe 7 is equal to the height of the top of the rotating wheel 11 plus the radius r. When adjusting, the height of the top of the rotating wheel 11 can be used as a reference for adjustment. The height of the top of the rotating wheel 11 is obtained by the position sensor 105; Step 3: The expansion and support assembly 6 props up the steel pipe 7, and the first motor 2 rotates to rotate the steel pipe 7 and enter the inner side of the support ring 12; Step 4: According to the diameter of the steel pipe 7 obtained in step 1, change the angle of the nozzle 22 so that the extension line of the nozzle 22 is on the tangent line of the surface of the steel pipe 7.

[0039] Specifically, the method for the support assembly to obtain the outer edge radius r of the steel pipe 7 is: S1: The line connecting the contact points of the two rotating balls 21 and the steel pipe 7 on the same plane in the front and rear rows is the x-axis, and the vertical line at the midpoint of the line is the y-axis. The coordinates of the contact points of the two rotating balls 21 and the steel pipe 7 are (-a, 0) and (a, 0), the contact point between the top end of the rotating wheel 11 and the bottom end of the steel pipe 7 is (0, c), and the coordinates of the center of the steel pipe 7 are (0, y); S2: According to the standard equation of a circle, we have r 2 = (yc) 2 =a 2 +y 2 ; S3: According to S2, we can get y , c is a negative number; S4: replace y in S3 Substituting into r=yc, we have r= -c, because a is a constant, c=d+m, wherein d is the ordinate of the maximum extension height of the top end of the runner 11 in the coordinate system, which is a constant 0, that is, the maximum extension height of the top end of the runner 11 in the coordinate system is the coordinate center point, and m is the ordinate of the top end of the runner 11 in the coordinate system after being compressed, and m is obtained by the position sensor 105, thereby obtaining the length of the radius r of the steel pipe 7.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A production device for stainless steel pipes, comprising a first motor (2), a fixing plate (5) and a water spray ring (14) supported by a support plate (1), characterized in that: The production equipment also includes a support assembly, the support assembly is used to place the steel pipe (7), the support assembly includes two support frames (8) arranged in parallel, the support frames (8) are supported by a first electric push rod (25) and can achieve height adjustment, a support plate (9) is fixedly connected to the outer side of the top end of the support frame (8), a gap for placing the steel pipe (7) exists between the two rows of support plates (9), and a rotating ball (21) is rotatably connected to the inner side of the support plate (9); A water spray ring (14) is arranged on the right side of the support assembly, the outer side of the water spray ring (14) is fixedly connected to a concentric support ring (12), the inner side of the support ring (12) is hollow, the bottom end of the support ring (12) is connected to a high-pressure water pipe (13), and a spray head (22) connected to the high-pressure water pipe (13) is arranged on the inner side of the water spray ring (14); The inner side of the fixing plate (5) is spirally connected to a screw rod (4), the inner side of the screw rod (4) is hollow, and the extension line of the screw rod (4) is coaxial with the center line of the water spray ring (14). The end of the main shaft of the first motor (2) is fixedly connected to an outer hexagonal rod (3), the outer side of the outer hexagonal rod (3) is slidably connected to the inner side of the screw rod (4) to achieve torque transmission, and the right end of the screw rod (4) is fixedly connected to an expansion component (6), and the expansion component (6) can extend into the inner side of the steel pipe (7) and drive the steel pipe (7) to rotate.

2. The production equipment for stainless steel pipes according to claim 1, characterized in that: The device further comprises a first telescopic rod (10), the upper movable end of the first telescopic rod (10) being rotatably connected to a rotating wheel (11), and after the steel pipe (7) is supported by the supporting assembly, the top end of the rotating wheel (11) can upwardly contact the bottom end of the steel pipe (7), the first telescopic rod (10) comprising an outer rod (101) and a piston (104) slidably connected therein, one end of the piston (104) being fixedly connected to an inner rod (103), the inner side of the outer rod (101) being fixedly connected to a position sensor (105), the piston (104) sliding on the position sensor (105), the inner side of the outer rod (101) being provided with a spring (102), the two ends of the spring (102) being respectively fixedly connected to one end of the piston (104) and the inner side of the bottom end of the outer rod (101).

3. The production equipment for stainless steel pipes according to claim 2, characterized in that: The inner side of the water spray ring (14) is evenly connected to a connecting ball (15) in a rotationally connected manner, the inner side of the connecting ball (15) is fixedly connected to a hollow tube (16), the outer side of the water spray ring (14) is connected to a second telescopic rod (23) in a rotationally connected manner via a hinge, and the other end of the second telescopic rod (23) is connected to the outer side of the hollow tube (16) in a rotationally connected manner via a hinge.

4. The production equipment for stainless steel pipes according to claim 3, characterized in that: One end of the hollow tube (16) facing the inside of the water spray ring (14) is connected to the spray head (22), one end of the hollow tube (16) extends to the outside of the water spray ring (14), and the end of the hollow tube (16) facing the outside of the water spray ring (14) is connected to the inside of the support ring (12) through a hose (26).

5. The production equipment for stainless steel pipes according to claim 3, characterized in that: The connecting balls (15) are in an even number, and one end of the plurality of hollow tubes (16) facing the inner side of the water spray ring (14) is fixedly connected to the nozzle (22) or the elastic metal strip (20), the nozzle (22) is connected to the hollow tube (16), the nozzles (22) or the elastic metal strips (20) on the plurality of hollow tubes (16) are arranged at intervals in sequence, the hollow tube (16) connected to the nozzle (22) is connected to the inner side of the support ring (12) through a hose (26), and the elastic metal strip (20) is in a rack shape on one side facing the steel pipe (7).

6. The production equipment for stainless steel pipes according to claim 4 or 5, characterized in that: The outer side of the water spray ring (14) is rotatably connected to a swivel (17) via a slide groove, one end of the swivel (17) is fixedly connected to a connecting rod (18), and a pull rope (24) is fixedly connected between the connecting rod (18) and the hollow tube (16). When the swivel (17) rotates, the pull rope (24) can be used to pull and change the direction of the hollow tube (16) so that the spray direction of the spray head (22) is tangent to the surface of the steel tube (7).

7. The production equipment for stainless steel pipes according to claim 6, characterized in that: The expansion support assembly (6) comprises a left cylinder (61) and a right cylinder (62), the left cylinder (61) being fixedly connected to the right end of the screw rod (4), a second electric push rod (63) being fixedly connected to the inner side of the left cylinder (61), a movable end of the second electric push rod (63) being fixedly connected to the left end of the right cylinder (62), the right side of the left cylinder (61) and the left side of the right cylinder (62) being rotatably connected to a connecting rod (64) via a hinge, the connecting rod (64) on the left cylinder (61) and the connecting rod (64) on the right cylinder (62) on the same side being rotatably connected to the same support rod (65) via a hinge, and a top rod (66) for supporting the inside of the steel pipe (7) being fixedly connected to the outer side of the support rod (65).

8. The production equipment for stainless steel pipes according to claim 7, characterized in that: The outer side of the water spray ring (14) is fixedly connected to a second motor (19), the output end of the second motor (19) is fixedly connected to a gear, the outer side of the rotating ring (17) is in the shape of a toothed ring, and the gear meshes with the outer side of the rotating ring (17).

9. A method for producing a stainless steel pipe, characterized in that: Using the production equipment for stainless steel pipes as claimed in claim 8, the steps are: Step 1: Obtain the outer edge radius r of the steel pipe (7) through the support assembly; Step 2: The movable end of the first electric push rod (25) rises to make the center line of the steel pipe (7) coincide with the center extension line of the screw rod (4) and the center extension line of the water spray ring (14); Step 3: The expansion and support assembly (6) supports the steel pipe (7), and the first motor (2) rotates to cause the steel pipe (7) to rotate and enter the inner side of the support ring (12); Step 4: According to the diameter of the steel pipe (7) obtained in step 1, the angle of the nozzle (22) is changed so that the extension line of the nozzle (22) is on the tangent line of the surface of the steel pipe (7).

10. The method for producing a stainless steel pipe according to claim 9, characterized in that: In step 1, the method for the support assembly to obtain the outer edge radius r of the steel pipe is: S1: The line connecting the contact points of the two rotating balls (21) and the steel pipe (7) on the same plane in the front and rear rows is the x-axis, the vertical line at the midpoint of the line is the y-axis, the coordinates of the contact points of the two rotating balls (21) and the steel pipe (7) are (-a, 0) and (a, 0), the contact point of the top end of the rotating wheel (11) and the bottom end of the steel pipe (7) is (0, c), and the coordinates of the center of the steel pipe (7) are (0, y); S2: According to the standard equation of a circle, we have r 2 = (yc) 2 =a 2 +y 2 ; S3: According to S2, we can get y , c is a negative number; S4: replace y in S3 Substituting into r=yc, we have r= -c, because a is a constant, c=d+m, wherein d is the ordinate of the maximum extension height of the top end of the runner (11) in the coordinate system, which is a constant 0, that is, the maximum extension height of the top end of the runner (11) in the coordinate system is the coordinate center point, and m is the ordinate of the top end of the runner (11) in the coordinate system after being compressed, and m is obtained by the position sensor (105), thereby obtaining the length of the radius r of the steel pipe (7).

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