Device for improving quality of inner surface of hot-rolled seamless steel pipe

Abstract

The utility model discloses a device for improving the quality of the inner surface of a hot-rolled seamless steel pipe, which comprises a track filling device, the track filling device comprises a transportation track and a movable filling device arranged on the transportation track, the filling device is a movable mechanical arm, the track filling device is adjacent to a secondary punching device, and the secondary punching device is connected with the transportation track. The tubular billet perforated by the secondary perforating equipment is transferred to the tubular billet rotating device through the transferring device, the tubular billet rotating device is arranged on the borax blowing station, and the tubular billet rotating device of the borax blowing station comprises two or more sets of rotating carrier rollers used for supporting the tubular billet to rotate on the rotating carrier rollers. A borax nozzle is arranged at the rear upper position of the middle side of the two rotating carrier rollers on the outer side, a rotary arm is further arranged on the outer side of the borax injection station, and a conveying driving device is arranged on the side close to the rotary arm.

Description

Technical Field

[0001] The utility model belongs to the technical field of material storage, and particularly relates to a device for improving the inner surface quality of hot-rolled seamless steel pipes. Background Technique

[0002] During the production process of hot-rolled seamless steel pipes, after the piercing process, in order to ensure the stable inner surface quality of the semi-finished pipe, it is necessary to blow in an antioxidant - borax. The traditional way of spraying borax is that after piercing, the semi-finished pipe is flipped by a rotary arm to the borax spraying station. The borax spraying station consists of several V-shaped brackets used to support the semi-finished pipe after piercing. At this time, the borax nozzle sprays borax onto the semi-finished pipe after piercing. The traditional borax spraying process has a large waste of borax spraying, and the borax sprayed on the inner surface of the semi-finished pipe after piercing is unevenly attached to the inner surface of the semi-finished pipe after piercing, resulting in internal knot defects on the inner surface of the steel pipe.

[0003] After the traditional process of borax spraying, the rotary arm flips the semi-finished pipe onto the transmission chain, and the chain transports it to the rolling mill process for rolling. Since it takes time for the rotary arm to flip after borax spraying, the running speed of the semi-finished pipe transmission chain is relatively slow, resulting in a large temperature drop of the semi-finished pipe, and the load of the rolling mill also increases accordingly, and the power consumption and the roll consumption of the rolling mill will increase.

[0004] In view of the above factors, a device for improving the inner surface quality of hot-rolled seamless steel pipes is specially designed, which solves the problems of large temperature drop of the semi-finished pipe, corresponding increase in the load of the rolling mill, increase in power consumption and roll consumption of the rolling mill, and the walking trolley body moves forward to the front of the rolling mill, and the semi-finished pipe also reaches the stop position for the rolling work of the next rolling process. Content of the Utility Model

[0005] The purpose of the utility model is to provide a device for improving the inner surface quality of hot-rolled seamless steel pipes to solve the problems raised in the above background technique.

[0006] The purpose of the utility model is realized by the following technical solutions: a device for improving the inner surface quality of hot-rolled seamless steel pipes, including a track filling device, the track filling device includes a transport track and a filling device movable on the transport track, and the filling device is a mobile robotic arm;

[0007] The track filling device is adjacent to the secondary piercing equipment. After the semi-finished pipe is pierced by the secondary piercing equipment, it is transferred to the semi-finished pipe rotating device by a transfer device, and the semi-finished pipe rotating device is arranged on the borax spraying station;

[0008] The semi-finished pipe rotating device at the borax spraying station includes two or more groups of rotating rollers for supporting the semi-finished pipe to rotate on the rotating rollers, and a borax nozzle is arranged at the position above the rear side between the two outer rotating rollers;

[0009] A slewing arm is also arranged outside the borax injection station, and a transportation driving device is arranged adjacent to one side of the slewing arm.

[0010] Further, two or more slewing arms are arranged on the right side of the borax injection station, and the slewing arms are used to turn over the capillary tubes after borax injection.

[0011] Further, the transportation driving device includes a walking trolley body, and two or more groups of gears are arranged below the walking trolley body, and the walking trolley body is matched with a rack arranged below.

[0012] Further, two or more groups of tracks are arranged below the gears on the walking trolley body, and a rack is arranged above the tracks.

[0013] Further, the upper surface of the walking trolley body is inclined, and the inclination is 5° - 25°.

[0014] Further, the inclination of the upper surface of the walking trolley body is set at 15°.

[0015] Further, a detachable stopper is arranged at the right end of the walking trolley body, and the stopper is used to block the capillary tube.

[0016] Further, the detachable manner of the walking trolley body and the stopper is bolt connection or plug-in connection.

[0017] Further, the mobile robotic arm adopts a jointed robotic arm, and the mobile robotic arm is arranged on one side of the transportation track, and the mobile robotic arm is arranged on a track plane made of a steel structure truss outside the transportation track.

[0018] A number of driving rollers are arranged on the transportation track and are set by independent motors. Among them, the end face of the driving roller is a circular cross-section, and the middle is in a waist drum shape.

[0019] A method for improving the inner surface quality of hot-rolled seamless steel pipes includes the following steps;

[0020] In the pre-treatment stage, two-stage rolling is adopted in the pre-treatment stage. In the rough rolling stage, online cooling is carried out 2 times or more between passes, and in the finish rolling stage, descaling is not carried out or descaling is carried out in the first two passes;

[0021] The pre-treated capillary tube is perforated by a primary perforation device. After the primary perforation, the capillary tube is filled with lubricant by a moving robotic arm on a track filling device. The filled capillary tube is perforated again by a secondary perforation device. After being perforated by the secondary perforation device, the capillary tube is transferred to a capillary tube rotating device by a transfer device. The capillary tube rotating device is arranged at a borax spraying station. The capillary tube rotating device at the borax spraying station includes two or more sets of rotating rollers for supporting the capillary tube to rotate on the rotating rollers. A borax nozzle is arranged at a position above and behind the middle side of the two outer rotating rollers for borax spraying;

[0022] After the borax spraying is completed, the capillary tube after spraying borax is turned over above the body of the walking trolley by starting the rotary arm. The body of the walking trolley moves forward to the front of the continuous rolling mill, and the capillary tube also reaches the stop position to carry out the rolling work of the next continuous rolling process.

[0023] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0024] The present utility model solves the problems that the temperature drop of the capillary tube is relatively large, the load of the continuous rolling mill increases accordingly, the power consumption and the roll consumption of the continuous rolling mill increase, and the body of the walking trolley moves forward to the front of the continuous rolling mill, and the capillary tube also reaches the stop position to carry out the rolling work of the next continuous rolling process.

[0025] The present utility model can effectively solve the problem that the borax sprayed on the inner surface of the capillary tube after perforation is unevenly attached to the inner surface of the capillary tube after perforation, resulting in the defect of internal nodule on the inner surface of the steel pipe. Description of the Drawings

[0026] Figure 1 is the overall schematic diagram of the present utility model;

[0027] Figure 2 is the schematic diagram of the capillary tube rotating device and the transportation driving equipment of the present utility model;

[0028] Figure 3 is the schematic diagram of the transportation driving equipment of the present utility model;

[0029] Figure 4 is the side schematic diagram of the transportation track of the present utility model;

[0030] Figure 5 is the top view schematic diagram of the transportation track of the present utility model. Detailed Embodiment

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0033] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0034] As Figures 1-5 shown, a device for improving the inner surface quality of hot-rolled seamless steel pipes includes a track filling device 1. The track filling device 1 includes a transport track 1-1 and a filling device 1-2 that is movable on the transport track 1-1. The filling device 1-2 is a mobile robotic arm;

[0035] The track filling device 1 is adjacent to the secondary piercing device 2. The pierced billet is transferred to the billet rotating device 3 through the transfer device after being pierced by the secondary piercing device 2. The billet rotating device 3 is arranged at the borax spraying station;

[0036] The billet rotating device 3 at the borax spraying station includes two or more rotating rollers for supporting the billet to rotate on the rotating rollers. A borax nozzle 4 is arranged at the position above the middle side and rear of the two outer rotating rollers;

[0037] The billet rotating device 3 is supported by a steel structure truss. The slave rotating rollers and the main rotating rollers are respectively installed on the steel structure truss. The main rotating roller is connected to a reduction motor to drive its rotation.

[0038] The mobile robotic arm adopts a jointed manipulator and is arranged on one side of the transportation track 1-1. The mobile robotic arm is arranged on the track plane made of a steel structure truss outside the transportation track 1-1.

[0039] A number of driving rollers are arranged on the transportation track 1-1 and are set by independent motors. Among them, the end face of the driving roller is a circular cross-section and the middle is in a waist drum shape.

[0040] A capillary rotary arm 5 is further arranged outside the borax spraying station, and a transportation driving device 6 is arranged adjacent to one side of the capillary rotary arm 5.

[0041] In order to facilitate the movement of the capillary under the use state by setting the capillary rotary arm, two or more capillary rotary arms 5 are arranged on the right side of the borax spraying station. The capillary rotary arm 5 is used to flip the capillary after spraying borax.

[0042] The capillary rotary arm 5 is a rotary arm with frequency conversion control, adopting an Inovance frequency converter, a GE90-70 PLC and a GE-ALG320 analog output board to accurately control and detect the entire circumferential movement process of the rotary arm.

[0043] In order to facilitate the movement by the cooperation of a gear and a rack under the use state, the transportation driving device 6 includes a walking trolley body 6-1, and two or more groups of gears 6-2 are arranged below the walking trolley body 6-1. The walking trolley body 6 cooperates with a rack 6-3 arranged below.

[0044] A driving device is arranged inside the walking trolley body to drive the gear to rotate so as to cooperate with the rack and move forward under the drive.

[0045] Two or more groups of tracks are arranged below the gear 6-2 on the walking trolley body 6, and a rack 6-3 is arranged above the tracks.

[0046] In order to facilitate the promotion of the capillary to roll forward while moving forward with the walking trolley body under the use state by setting an inclined surface on the walking trolley body 6, the upper surface of the walking trolley body 6 is inclined, and the inclination is 5°-25°.

[0047] The inclination of the upper surface of the walking trolley body 6 is set at 15°

[0048] In order to facilitate the blocking of the capillary to be transported by setting a stop on the walking trolley body 6 under the use state, a detachable stop 7 is arranged at the right end of the walking trolley body 6, and the stop is used to block the capillary.

[0049] In order to facilitate the replacement by setting a detachable stop on the walking trolley body 6 under the use state, the detachable method of the walking trolley body 6 and the stop 7 is bolt connection or plug connection.

[0050] A method for improving the internal surface quality of hot-rolled seamless steel pipes, comprising the following steps;

[0051] Pre-preprocessing stage, in which two-stage rolling is adopted in the pre-preprocessing stage. In the rough rolling stage, online cooling between passes is carried out 2 times or more, and in the finish rolling stage, descaling is not carried out or descaling is carried out in the first two passes;

[0052] The billet after pre-preprocessing is perforated by a primary piercing device. The billet after primary piercing is filled with lubricant by a mobile robotic arm on a rail filling device. The billet after filling is perforated again by a secondary piercing device. The billet perforated by the secondary piercing device is transferred to a billet rotating device by a transfer device. The billet rotating device is arranged at a borax spraying station. The billet rotating device at the borax spraying station includes two or more groups of rotating rollers for supporting the billet to rotate on the rotating rollers. A borax nozzle is arranged at the position above the middle side and rear of the two outer rotating rollers for borax spraying;

[0053] After the borax spraying is completed, the billet after spraying borax is turned over above the walking trolley body by starting the rotary arm. The walking trolley body moves forward to the front stage of the continuous rolling mill, and the billet also reaches the stop position to carry out the rolling work of the next continuous rolling process.

[0054] Pre-preprocessing stage, in which two-stage rolling is adopted in the pre-preprocessing stage. In the rough rolling stage, online cooling between passes is carried out 2 times or more, and in the finish rolling stage, descaling is not carried out or descaling is carried out in the first two passes;

[0055] During operation, the pre-treated capillary tube is perforated by a primary perforation device. After primary perforation, the capillary tube is filled with lubricant by a moving robotic arm on the track filling device (when filling, a movable platform is arranged adjacent to the track filling device outside the track filling device, lubricant is placed on the movable platform, and the moving robotic arm is used for grasping). The filled capillary tube is perforated again by a secondary perforation device. The capillary tube perforated by the secondary perforation device (seamless steel tube perforator) is transferred to the capillary tube rotating device by a transfer device (a capillary tube transfer device disclosed in the prior art can be used). At the borax spraying station of the perforated capillary tube, the rotating rollers start to rotate to drive the capillary tube to rotate. At this time, the borax nozzle sprays borax. Since the capillary tube is constantly rotating during the borax spraying process, the borax will be evenly attached to the inner wall of the capillary tube, solving the problem of internal nodule defects on the inner surface of the steel tube. After the borax spraying is completed, the rotary arm starts to turn the capillary tube after borax spraying over the upper part of the walking trolley body. The walking trolley body moves forward under the drive of the gear and rack device. Since the upper surface of the walking trolley body has a certain slope, the capillary tube will roll forward while moving forward with the walking trolley body. In this way, the running speed of the capillary tube is greater than the running speed of the capillary tube carried by the traditional conveyor chain. This solves the problems of a large temperature drop of the capillary tube, a corresponding increase in the load of the continuous rolling mill, and an increase in power consumption and the consumption of the rolls of the continuous rolling mill. The walking trolley body moves forward to the front of the continuous rolling mill, and the capillary tube also reaches the stop position, and the rolling work of the next continuous rolling process is carried out.

[0056] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0057] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for improving the inner surface quality of a hot-rolled seamless steel pipe, characterized in that: The invention comprises a track filling device (1), wherein the track filling device (1) comprises a transport track (1-1) and a filling device (1-2) movably arranged on the transport track (1-1), wherein the filling device (1-2) is a mobile mechanical arm; The track filling device (1) is adjacent to the secondary perforating device (2), and the capillary tube perforated by the secondary perforating device (2) is moved to the capillary tube rotating device (3) via the transfer device, and the capillary tube rotating device (3) is arranged on the borax spraying station; The hair tube rotating device (3) of the borax spraying station comprises two or more groups of rotating rollers for supporting the hair tube to rotate on the rotating rollers, and a borax nozzle (4) is arranged at the upper and rear middle position of the two outer rotating rollers; A capillary tube rotating arm (5) is also arranged outside the borax spraying station, and a transport driving device (6) is arranged adjacent to one side of the capillary tube rotating arm (5).

2. The device for improving the inner surface quality of a hot-rolled seamless steel pipe according to claim 1, characterized in that: Two or more capillary tube rotating arms (5) are arranged on the right side of the borax spraying station, and the capillary tube rotating arms (5) are used to flip the capillary tube after the borax is sprayed.

3. The device for improving the inner surface quality of a hot-rolled seamless steel pipe according to claim 2, characterized in that: The transport driving device (6) comprises a trolley body (6-1), two or more groups of gears (6-2) arranged below the trolley body (6-1), and the trolley body (6-1) cooperates with a rack (6-3) arranged below.

4. The device for improving the inner surface quality of a hot-rolled seamless steel pipe according to claim 3, characterized in that: Two or more sets of tracks are arranged below the gear (6-2) on the body (6-1) of the traveling trolley, and a rack (6-3) is arranged above the track.

5. The device for improving the inner surface quality of a hot-rolled seamless steel pipe according to claim 4, characterized in that: The upper surface of the traveling trolley body (6-1) is inclined, with an inclination of 5°-25°.

6. The device for improving the inner surface quality of a hot-rolled seamless steel pipe according to claim 5, characterized in that: The upper surface of the traveling trolley body (6-1) is inclined at an angle of 15°.

7. The device for improving the inner surface quality of a hot-rolled seamless steel pipe according to claim 6, characterized in that: A detachable stopper (7) is provided at the right end of the walking trolley body (6-1), and the stopper is used to block the capillary tube.

8. The device for improving the inner surface quality of a hot-rolled seamless steel pipe according to claim 7, characterized in that: The trolley body (6-1) and the stopper (7) are detachable in a bolted connection or plug-in connection.

9. The device for improving the inner surface quality of a hot-rolled seamless steel pipe according to claim 8, characterized in that: The mobile mechanical arm adopts an articulated manipulator, and the mobile mechanical arm is arranged on one side of the transport track (1-1). The mobile mechanical arm is arranged on a track plane made of a steel structure truss outside the transport track (1-1). A plurality of transmission rollers set by independent motors are arranged on the transport track (1-1), wherein the end face of the transmission roller is a circular cross-section and the middle is in the shape of a waist drum.

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