Roller device and method for conveying long steel pipes

Abstract

The present invention discloses a roller conveyor device and method for conveying long steel pipes, comprising rows of steel pipes, wherein the rows of steel pipes are moved to the lower cooling bed wide roller conveyor by a discharge arm and a rotary arm when the rows of steel pipes arrive at the end of the cooling bed, the cooling bed wide roller conveyor is supported by a roller conveyor bracket, the cooling bed wide roller conveyor is divided into several sections, each section is composed of several intervals of the cooling bed wide roller conveyor, the cooling bed wide roller conveyor is independently provided with a control device, and each section is independently provided with a control button for transmission control, a variable frequency duct air cooling system is added to the cooling bed wide roller conveyor, the variable frequency duct air cooling system cools the cooling bed wide roller conveyor and the control device by compressed air, a cold metal detector is provided between each section of the cooling bed wide roller conveyor, and the power supply of each section of the cooling bed wide roller conveyor is controlled by an AC contactor to disconnect, the cold metal detector model adopts KHLRD2 metal detector, and the cold metal detector is electrically connected to a PLC controller.

Description

Technical Field

[0001] The invention belongs to the technical field of steel pipe transmission, and particularly relates to a roller device and method for transmitting long steel pipes. Background Art

[0002] In the existing hot-rolled small-diameter seamless steel pipe production process, the steel pipes rolled in the stretching and reducing process are long, generally reaching about 80 meters. The steel pipes are then cooled horizontally by a cooling bed. When the steel pipes reach the end of the cooling bed, the unloading arm and the rotating arm move the steel pipes to the wide roller table of the lower cooling bed. The wide roller table rotates and transfers the rows of steel pipes to the pipe gang saw for cutting. Due to the long length of the steel pipes on the lower cooling bed and the poor straightness of the steel pipes, the pipe bodies of the row of steel pipes directly above the roller table cannot contact the upper surface of the roller table. As a result, several steel pipes in the row cannot run simultaneously, and the sawing requirements of the pipe gang saw cannot be met, affecting production.

[0003] To reduce the failure rate of roller table motors and extend their service life, the most effective measure currently is to lower the ambient temperature of the roller table and its motor. However, since the roller table is mounted on the motor output shaft, water cooling is complex to install and inconvenient for subsequent use and maintenance.

[0004] In view of the above factors, a roller device and method for transmitting long steel pipes are specially designed. A roller is set above each roller bracket, and the radial cross-sectional area of ​​the roller is an elliptical roller. When the elliptical roller rotates, the turning radius increases, which improves the production efficiency and the sizing rate of the steel pipe. The temperature of the roller and the surrounding environment is greatly reduced, and the service life is increased. It is worthy of reference and application in the metallurgical industry. Summary of the Invention

[0005] The object of the present invention is to provide a roller conveyor device and method for conveying long steel pipes, so as to solve the problems raised in the above background technology.

[0006] The object of the present invention is achieved through the following technical solutions: a roller conveyor device for conveying long steel pipes, comprising rows of steel pipes, wherein the rows of steel pipes, when arriving at the end of the cooling bed, are moved by a discharge arm and a rotary arm to a wide roller conveyor on the lower cooling bed, the wide roller conveyor on the cooling bed being supported by a roller conveyor support, the wide roller conveyor on the cooling bed being divided into a plurality of sections, each section being composed of a plurality of intervals between the wide roller conveyors on the cooling bed, the wide roller conveyors on the cooling bed being independently provided with a control device, and each section being independently provided with a control button connected to a PLC for transmission control;

[0007] A variable frequency air cooling system is added to the wide roller conveyor of the cooling bed, and the variable frequency air cooling system cools the wide roller conveyor of the cooling bed and the control device through compressed air.

[0008] Furthermore, a cold metal detector is provided between each section of the wide roller conveyor of the cooling bed, and the power supply of each section of the wide roller conveyor of the cooling bed is controlled to be disconnected by an AC contactor.

[0009] Furthermore, the cold metal detector model adopts KHLRD2 metal detector, and the cold metal detector is electrically connected to the PLC controller. The cold metal detector detects a signal, transmits the signal to the PLC, and controls the operation of the control device through the PLC.

[0010] Furthermore, the control device includes a reduction motor and a coupling connected to the reduction motor, and the output end of the control device is connected to the wide roller of the cooling bed.

[0011] Furthermore, the radial cross-sectional area of ​​the wide roller of the cooling bed is an elliptical roller, and the elliptical parameter of the wide roller of the cooling bed is that the value of the major axis 2a / 2b is 6 / 5 to 5 / 4.

[0012] Furthermore, the variable frequency duct air cooling system includes a main pipe and a fan room, the main pipe is led from the fan room, the main pipe is arranged along the roller support and extends to the input end of the cooling bed;

[0013] A plurality of branch pipes are led out from the main pipe, and the end of each branch pipe is directly facing the center of the wide roller table of the cooling bed opposite to the control device.

[0014] Furthermore, the variable frequency duct air cooling system adopts a temperature detector and a fan frequency controller to detect the ambient temperature of the control device in real time, and feeds back the temperature detection information to the fan control system. The fan controls the output air volume through the fan frequency controller.

[0015] Furthermore, the fan control system adopts a PLC control system, the temperature detector is electrically connected to the control device, the temperature detector is electrically connected to the fan frequency conversion controller through a connecting line, and the fan frequency conversion controller is electrically connected to the fan motor group.

[0016] A method for a roller conveyor device for conveying long steel pipes, comprising the following steps:

[0017] During operation, when the steel pipe reaches the end of the cooling bed, the unloading arm and the rotating arm move the steel pipe to the wide roller of the lower cooling bed. Since the radial cross-sectional area of ​​the wide roller is elliptical, the rotation radius of the elliptical roller is larger than that of the traditional circular roller with radial cross-sectional area. Even if the straightness of the row of steel pipes is not good, when the elliptical roller rotates, the pipe bodies of the row of steel pipes directly above the roller can contact the upper surface of the elliptical roller. The row of steel pipes will reach the pipe row saw for sawing at the same time, which improves the production efficiency and the steel pipe sizing rate.

[0018] The cooling bed wide roller is divided into several sections, each section is composed of several intervals of the cooling bed wide roller, the cooling bed wide roller is independently provided with a control device, and then the signal is transmitted to the PLC, and then the control device is controlled by the PLC to operate;

[0019] A cold metal detector is added between each section of the cooling bed width roller. Each section is controlled by an AC contactor to disconnect the power supply. When the cold metal detector detects a signal, the signal is transmitted to the PLC, and then the AC contactor is controlled by the intermediate relay to control the operation of the roller motor.

[0020] The air cooling system is led from the fan room by a main pipe and extends to the input end of the cooling bed. Several small branches are led out from the main pipe, and compressed air cools the roller and motor through each branch. According to the different specifications of steel pipes produced on the production line, the ambient temperature of the roller motor is detected in real time, and the temperature detection information is fed back to the fan control system. The fan controls the output air volume through frequency conversion and speed regulation.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention arranges a roller above each roller support, and makes the radial cross-sectional area of ​​the roller into an elliptical roller. When the elliptical roller rotates, the turning radius increases, which improves both the production efficiency and the sizing rate of the steel pipe. The temperature of the roller and the surrounding environment is greatly reduced, and the service life is increased. It is worthy of reference and application in the metallurgical industry.

[0023] The invention is arranged along the roller support and extends to the input end of the cooling bed. A plurality of small branch pipes are drawn out from the main pipe, and compressed air cools the roller and the motor through the branch pipes.

[0024] The temperature of the environment around the roller and motor of the present invention is greatly reduced, and the service life of the roller motor is greatly improved. The roller air cooling technology is a good measure to solve the problem of equipment cooling under specific working conditions, and is worthy of reference and application in the metallurgical industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the wide roller table of the cooling bed of the present invention;

[0026] Figure 2 This is a schematic diagram of a wide roller table of a segmented cooling bed according to the present invention;

[0027] Figure 3 Schematic diagram of the cooling bed wide roller and control device of the present invention;

[0028] Figure 4 This is a schematic diagram of the variable frequency duct air cooling system of the present invention;

[0029] Figure 5 It is a schematic diagram of the variable frequency duct air cooling system and PLC of the present invention. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only 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 ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0032] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are 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 understood as limiting the present invention.

[0033] like Figure 1-5 As shown, a roller conveyor device for conveying long steel pipes includes a row of steel pipes 1. When the row of steel pipes 1 reaches the end of the cooling bed, a discharge arm and a rotary arm move the row of steel pipes 1 to the wide roller conveyor 2 of the lower cooling bed. The wide roller conveyor 2 of the cooling bed is supported by a roller conveyor support 3. The wide roller conveyor 2 of the cooling bed is divided into several sections, each section is composed of several intervals of the wide roller conveyor 2 of the cooling bed. The wide roller conveyor 2 of the cooling bed is independently provided with a control device 4, and each section is independently provided with a control button for transmission control;

[0034] A variable frequency air cooling system 5 is additionally provided at the cooling bed wide roller conveyor 2 , and the variable frequency air cooling system 5 cools the cooling bed wide roller conveyor 2 and the control device 4 through compressed air.

[0035] In order to detect the signal through the cold metal detector in the use state, thereby prompting the operation of the control device, a cold metal detector 6 is provided between each section of the cooling bed wide roller 2, and each section of the cooling bed wide roller 2 is disconnected by an AC contactor to control the power supply. The cold metal detector 6 adopts the KHLRD2 metal detector. The cold metal detector 6 is electrically connected to the PLC controller. The cold metal detector 6 detects the signal, transmits the signal to the PLC, and then controls the AC contactor (not shown in the prior art figure) through the intermediate relay to attract the control device to operate.

[0036] In order to facilitate the rotation of the roller by the control device in use, the control device 4 includes a reduction motor 4-1 and a coupling 4-2 connected to the reduction motor 4-1, and the output end of the control device 4 is connected to the cooling bed wide roller 2.

[0037] In order to increase the contact area during use and enable rows of steel pipes to reach the pipe saw machine for sawing at the same time, the radial cross-sectional area of ​​the cooling bed wide roller 2 is an elliptical roller, and the elliptical parameter of the cooling bed wide roller 2 is that the value of the major axis 2a / 2b is 6 / 5~5 / 4.

[0038] In order to reduce the failure rate of the roller motor and increase its service life during use, the variable frequency air cooling system 5 includes a main pipe 5-1 and a fan room 5-2. The main pipe 5-1 is drawn from the fan room 5-2. The main pipe 5-1 is arranged along the roller support 3 and extends to the input end of the cooling bed.

[0039] Several branch pipes 5-3 are led out from the main pipe 5-1, and the end of each branch pipe 5-3 faces the center of the wide roller table 2 of the cooling bed opposite the control device 4.

[0040] In order to facilitate the control of air volume through the fan frequency conversion controller when in use, the variable frequency duct air cooling system 5 includes a temperature detector 5-4 and a fan frequency conversion controller 5-5. The temperature detector 5-4 and the fan frequency conversion controller 5-5 detect the ambient temperature of the control device 4 in real time, and the temperature detection information is fed back to the fan control system. The fan controls the output air volume through the fan frequency conversion controller 5-5.

[0041] The fan control system adopts a PLC control system, the temperature detector 5-4 is electrically connected to the control device 4, the temperature detector 5-4 is electrically connected to the fan frequency conversion controller 5-5 through a connecting line, and the fan frequency conversion controller 5-5 is electrically connected to the fan motor group 5-6.

[0042] A method for a roller conveyor device for conveying long steel pipes, comprising the following steps:

[0043] During operation, when the steel pipe reaches the end of the cooling bed, the unloading arm and the rotating arm move the steel pipe to the wide roller of the lower cooling bed. Since the radial cross-sectional area of ​​the wide roller is elliptical, the rotation radius of the elliptical roller is larger than that of the traditional circular roller with radial cross-sectional area. Even if the straightness of the row of steel pipes is not good, when the elliptical roller rotates, the pipe bodies of the row of steel pipes directly above the roller can contact the upper surface of the elliptical roller. The row of steel pipes will reach the pipe row saw for sawing at the same time, which improves the production efficiency and the steel pipe sizing rate.

[0044] The cooling bed wide roller is divided into several sections, each section is composed of several intervals of the cooling bed wide roller, the cooling bed wide roller is independently provided with a control device, and each section is independently provided with a control button connected to the PLC for transmission control;

[0045] When the cooling bed output roller is in single motion, each section has a control button; when in linkage, the two sections are controlled by the same control button (not shown in the figure).

[0046] A cold metal detector is added between each section of the cooling bed width roller. Each section is controlled by an AC contactor to disconnect the power supply. When the cold metal detector detects a signal, the signal is transmitted to the PLC, and then the control device is operated through the PLC;

[0047] The air cooling system is led from the fan room by a main pipe and extends to the input end of the cooling bed. Several small branch pipes are led out from the main pipe. The end of each branch pipe is facing the center of the roller table opposite the roller motor. Compressed air cools the roller table and the motor through each branch pipe. According to the different specifications of the steel pipes produced on the production line, the ambient temperature of the roller table motor is detected in real time, and the temperature detection information is fed back to the fan control system. The fan controls the output air volume through frequency conversion speed regulation.

[0048] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0049] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A roller conveyor device for conveying long steel pipes, comprising a row of steel pipes (1), wherein the row of steel pipes (1) is moved to a wide roller conveyor (2) on the lower cooling bed by a discharge arm and a rotary arm when the row of steel pipes (1) reaches the end of the cooling bed, and is characterized in that: The lower cooling bed wide roller (2) is supported by a roller support (3), the lower cooling bed wide roller (2) is divided into several sections, each section is composed of several spaced wide rollers, the lower cooling bed wide roller (2) is independently provided with a control device (4), and each section is independently provided with a control button connected to a PLC for transmission control; A variable frequency roller air cooling system (5) is added to the lower cooling bed wide roller (2), and the variable frequency roller air cooling system (5) cools the lower cooling bed wide roller (2) and the control device (4) through compressed air; A cold metal detector (6) is provided between the two sections of the lower cooling bed wide roller conveyor (2), and each section of the lower cooling bed wide roller conveyor (2) is controlled by an AC contactor to disconnect the power supply; The cold metal detector (6) is electrically connected to the PLC controller. The cold metal detector (6) detects a signal and transmits the signal to the PLC, which controls the operation of the control device (4). The control device (4) includes a reduction motor (4-1) and a coupling (4-2) connected to the reduction motor (4-1), and the output end of the control device (4) is connected to the lower cooling bed wide roller (2); The radial cross section of the wide roller is elliptical, and the elliptical parameter of the wide roller is that the ratio of the major axis to the minor axis 2a / 2b is 6 / 5 to 5 / 4; The variable frequency roller air cooling system (5) includes a main pipe (5-1) and a fan room (5-2), wherein the main pipe (5-1) is led from the fan room (5-2), and the main pipe (5-1) is arranged along the roller support (3) and extends to the input end of the cooling bed; A plurality of branch pipes (5-3) are led out from the main pipe (5-1), and the end of each branch pipe (5-3) faces the center of the wide roller opposite the control device (4).

2. The roller conveyor device for conveying long steel pipes according to claim 1, characterized in that: The variable frequency roller cooling system (5) further comprises a temperature detector (5-4) and a fan variable frequency controller (5-5), which detect the ambient temperature of the control device (4) in real time through the temperature detector (5-4) and the fan variable frequency controller (5-5), and feed the temperature detection information back to the fan control system, and the fan speed is adjusted by the fan variable frequency controller (5-2) to control the output air volume.

3. The roller conveyor device for conveying long steel pipes according to claim 2, characterized in that: The fan control system adopts a PLC control system, the temperature detector (5-4) is electrically connected to the control device (4), the temperature detector (5-4) is electrically connected to the fan frequency conversion controller (5-5) through a connecting line, and the fan frequency conversion controller (5-5) is electrically connected to the fan motor group (5-6).

4. A method for conveying a long steel pipe using a roller conveyor according to claim 3, characterized in that: The method includes the following steps: During operation, when the steel pipe reaches the end of the cooling bed, the unloading arm and the rotating arm move the steel pipe to the wide roller of the lower cooling bed. Since the radial cross-section of the wide roller is elliptical, the rotation radius of the elliptical roller is larger than that of the traditional radial cross-section circular roller. Even if the straightness of the row of steel pipes is not good, when the elliptical roller rotates, the pipe bodies of the row of steel pipes directly above the roller can contact the upper surface of the elliptical roller. The row of steel pipes will reach the pipe saw machine for sawing at the same time, which not only improves production efficiency but also increases the sizing rate of steel pipes. The lower cooling bed wide roller is divided into several sections, each section is composed of several spaced wide rollers, the lower cooling bed wide roller is independently provided with a control device, and each section is independently provided with a control button for transmission control; A cold metal detector is added between the two sections of the lower cooling bed wide roller. Each section is controlled by an AC contactor to disconnect the power supply. When the cold metal detector detects a signal, the signal is transmitted to the PLC, and then the control device is controlled by the PLC to operate; The roller air cooling system is led from the fan room by a main pipe and extends to the input end of the cooling bed. Several branch pipes are led out from the main pipe. The end of each branch pipe is facing the center of the wide roller opposite the reduction motor. Compressed air cools the wide roller and the reduction motor through each branch pipe. According to the different specifications of the steel pipes produced on the production line, the ambient temperature of the reduction motor is detected in real time, and the temperature detection information is fed back to the fan control system. The fan controls the output air volume through frequency conversion speed regulation.

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