Automatic steel feeding system of heating furnace

Abstract

The utility model provides an automatic steel feeding system of a heating furnace. The automatic steel feeding system comprises a control unit, the heating furnace, a feeding rack and a feeding roller way. The feeding rack comprises a stop hook, a movable beam and a motor. The heating furnace comprises an in-furnace roller way and a furnace door. The feeding roller way comprises a first laser range finder, the first laser range finder is arranged at the position corresponding to the feeding rack, the first laser range finder is provided with two pairs of output contacts and can detect elements of two position sections, and the first laser range finder is used for detecting whether blanks exist at the position of the stop hook and the position, corresponding to the feeding rack, of the feeding roller way or not. The stop hook, the motor, the feeding roller way, the in-furnace roller way, the furnace door and the first laser range finder are connected to a control unit, and the stop hook, the motor, the feeding roller way, the in-furnace roller way and the furnace door are controlled by the control unit. The detection element support is manufactured on an existing steel feeding system, various detection elements are installed, and the improvement cost is low. According to the utility model, various steel billets can be orderly transported to the walking beam in the furnace according to a steel feeding instruction.

Description

Technical Field

[0001] The utility model relates to a steel feeding system for a heating furnace in a bar and wire rolling workshop, in particular to an autonomous steel feeding system for a heating furnace. Background Art

[0002] The steel feeding system of the heating furnace in the bar and wire rolling workshop adopts simple electric control equipment, lacks various detection components, and cannot realize unmanned autonomous steel feeding through logical judgment programs. All along, an operator has been operating various buttons in the on-site control room by visual and video, controlling the various types of steel billets on the loading platform to be loaded into the regenerative heating furnace according to the process requirements. The whole process requires high skills and sense of responsibility of employees, and is highly dependent. The rhythm of steel feeding is not easy to control, and the connection between upstream and downstream is not coherent. In addition, the long-term mechanical repetitive actions of employees are boring and prone to errors. Utility Model Content

[0003] In order to solve the problems existing in the above-mentioned prior art, the utility model provides a heating furnace autonomous steel feeding system, including a control unit, a heating furnace, a loading platform and a loading roller. The loading platform includes a stop hook, a moving beam and a motor. The heating furnace includes a furnace roller and a furnace door.

[0004] The loading roller includes a first laser rangefinder, which is arranged at a position corresponding to the loading platform. The first laser rangefinder has two pairs of output contacts and can detect elements in two position segments. The first laser rangefinder is used to detect whether there is a blank at the stop hook and the loading roller corresponding to the loading platform.

[0005] The stop hook, the motor, the feeding roller, the roller in the furnace, the furnace door and the first laser rangefinder are connected to the control unit, and the stop hook, the motor, the feeding roller, the roller in the furnace and the furnace door are controlled by the control unit.

[0006] Furthermore, the loading roller also includes a second laser rangefinder, which is arranged at the loading roller between the heating furnace and the loading platform. The distance between the first laser rangefinder and the second laser rangefinder is greater than the longest standard billet length. The second laser rangefinder is connected to the control unit for cooperating with the first laser rangefinder to detect the billet length.

[0007] Furthermore, it also includes an alarm device, which is connected to the control unit and controlled by the control unit, and is used to alarm when the blank is too short to prompt the staff to handle it.

[0008] Furthermore, the loading roller also includes a photoelectric tube, which is arranged at the loading roller between the heating furnace and the second laser rangefinder. The roller in the furnace also includes a first encoder, which is arranged on the roller of the roller in the furnace and is used to monitor the number of revolutions of the roller. The photoelectric tube and the first encoder are connected to the control unit, and are used to cooperate with the control unit to control the position of the blank after entering the heating furnace.

[0009] Furthermore, the heating furnace also includes a third laser rangefinder, which is arranged in the heating furnace at a position corresponding to the impact head and is used to detect the position of the blank in the heating furnace.

[0010] Furthermore, a second encoder is provided on the motor to monitor the number of revolutions of the motor, so as to control the start and stop of the motor.

[0011] The utility model manufactures a detection element bracket on an existing steel feeding system and installs various detection elements, and the modification cost is low.

[0012] The utility model can track and feedback the position of the billet, detect the length of the billet, and can transport various types of billets to the walking beam in the furnace in an orderly manner according to the steel feeding instruction without the need for employee operation, and can also issue a warning when the billet is too short. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] In the figure: 1. Heating furnace; 2. Loading platform; 3. Loading roller; 4. Stop hook; 5. Moving beam; 6. Motor; 7. Roller in furnace; 8. Furnace door; 9. First laser rangefinder; 10. Second encoder; 11. Second laser rangefinder; 12. Photoelectric tube; 13. First encoder; 14. Impact head; 15. Third laser rangefinder. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] like Figure 1 As shown, the heating furnace 1 autonomous steel feeding system of this embodiment includes a control unit, a heating furnace 1, a loading platform 2 and a loading roller 3. The loading platform 2 includes a stop hook 4, a moving beam 5 and a motor 6. The heating furnace 1 includes a furnace roller 7 and a furnace door 8.

[0018] The loading roller 3 includes a first laser rangefinder 9, which is arranged at a position corresponding to the loading platform 2. The first laser rangefinder 9 has two pairs of output contacts and can detect elements in two position segments. The first laser rangefinder 9 is used to detect whether there is a blank at the stop hook 4 and the loading roller 3 corresponding to the loading platform 2.

[0019] The stop hook 4, the motor 6, the feeding roller 3, the roller in the furnace 7, the furnace door 8 and the first laser rangefinder 9 are connected to the control unit, and the stop hook 4, the motor 6, the feeding roller 3, the roller in the furnace 7 and the furnace door 8 are controlled by the control unit.

[0020] The blank is lifted by the overhead crane onto the platform of the loading platform 2, waiting for the first laser rangefinder 9 on the loading roller 3 to detect and determine whether there is a blank on the roller outside the furnace. If not, the control unit sends an instruction to control the motor 6 of the loading platform 2 to drive the moving beam 5 to make a stepping motion, and move the blank toward the loading roller 3. During the movement, the first laser rangefinder 9 detects whether there is a blank at the position of the stop hook 4 of the loading platform 2. If not, the stop hook 4 is raised, and the motor 6 of the loading platform 2 is operated to make a positive stepping motion, moving the blank toward the loading roller 3. In this process, the stop hook 4 and the motor 6 are used to coordinate the blanks on the platform to arrange them neatly (because the blanks on the platform are tilted and uneven during the lifting process of the overhead crane), until the first laser rangefinder 9 detects that there is a blank at the position of the stop hook 4, and then controls the motor 6 to continue to operate and move forward one step, and further arrange the blanks to enhance the arrangement effect. In this embodiment, a second encoder 10 is provided on the motor 6 to monitor the number of revolutions of the motor 6, so as to control the start and stop of the motor 6 and make the step of the motor 6 controllable. In other embodiments, other means such as a stepper motor and a servo motor can also be used to control the number of revolutions of the motor 6. Then, the stop hook 4 is lowered, and the motor 6 of the feeding platform 2 is operated to move forward a step to move the front blank onto the feeding roller 3.

[0021] In this embodiment, the loading roller 3 preferably further includes a second laser rangefinder 11, which is arranged at the loading roller 3 between the heating furnace 1 and the loading platform 2. The distance between the first laser rangefinder 9 and the second laser rangefinder 11 is greater than the longest standard billet length. The second laser rangefinder 11 is connected to the control unit to cooperate with the first laser rangefinder 9 to detect the billet length. Preferably, an alarm device is also included, which is connected to the control unit and controlled by the control unit.

[0022] After the first laser rangefinder 9 detects the signal of the blank, the motor 6 of the loading platform 2 is stopped. The loading roller 3 is controlled to move slowly toward the heating furnace 1 until the second laser rangefinder 11 detects the signal and stops running. This process saves the time required for subsequent advancement and makes the front and back connection more compact. The distance between the first laser rangefinder 9 and the second laser rangefinder is fixed and greater than the longest standard blank length, and the speed of the loading roller 3 is fixed, so the linear speed is also fixed. When the second laser rangefinder 11 detects the rising edge signal of the blank head, the product of the timing and linear speed after subtracting the falling edge signal of the tail detected by the first laser rangefinder 9 from the known fixed distance between the two can be obtained. Billets that are too short will cause heating problems in the furnace. The billet length is compared with the set value of the control unit. If it is shorter than the setting, an alarm will be triggered and manual intervention will be performed to remove it.

[0023] In this embodiment, the loading roller 3 further includes a photoelectric tube 12, which is arranged at the loading roller 3 between the heating furnace 1 and the second laser rangefinder 11. The roller 7 in the furnace further includes a first encoder 13, which is arranged on the roller of the roller 7 in the furnace, and is used to monitor the number of revolutions of the roller. The photoelectric tube 12 and the first encoder 13 are connected to the control unit, and are used to cooperate with the control unit to control the position of the blank after entering the heating furnace 1.

[0024] When the stepping beam in the heating furnace 1 moves forward one step and a space appears on the roller 7 in the furnace, the control unit sends a command to control the furnace door 8 to open and the loading roller 3 to rotate forward, and the blank waiting on the loading roller 3 is sent to the specified position of the roller 7 in the heating furnace 1. When the photoelectric tube 12 detects the signal of the head of the billet, the roller 7 in the furnace is controlled to rotate forward at full speed. The timing of the photoelectric tube 12 is multiplied by the full speed line speed to calculate the total length of the billet. When the photoelectric tube 12 detects the tail signal of the billet, the roller 7 in the furnace is controlled to run at a slow speed to prevent the speed from being too fast, resulting in large inertia and colliding with the front end collision head 14, and it is beneficial to the position control of the billet. At the same time, the number of pulses of the first encoder 13 of the roller 7 in the furnace is counted. The number of pulses counted by the first encoder 13 and the circumference of the roller can accurately measure how far the billet has moved forward after leaving the photoelectric tube 12. The width of the heating furnace 1 and the distance to the phototube 12 are known and fixed. By calculating the total length of the billet, the width of the heating furnace 1 and the distance to the phototube 12, and the length calculated by the first encoder 13 of the furnace roller 7 after leaving the phototube 12, the position of the billet on the furnace roller 7 can be known.

[0025] In this embodiment, the heating furnace 1 further includes a third laser rangefinder 15, which is arranged in the heating furnace 1 at a position corresponding to the impact head 14, and is used to detect the position of the blank in the heating furnace 1. The third laser rangefinder 15 in the heating furnace 1 can also measure the distance between the head of the blank and the front impact head 14, and works together with the former to control the position of the blank through the first encoder 13 and the photoelectric tube 12, and double detects the position of the blank on the roller.

[0026] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A heating furnace autonomous steel feeding system, characterized in that: It includes a control unit, a heating furnace, a loading platform and a loading roller; the loading platform includes a stop hook, a moving beam and a motor; the heating furnace includes a furnace roller and a furnace door; the loading roller includes a first laser rangefinder, which is arranged at a position corresponding to the loading platform and is used to detect whether there is a blank at the stop hook and the loading roller corresponding to the loading platform; the stop hook, the motor, the loading roller, the furnace roller, the furnace door and the first laser rangefinder are connected to the control unit, and the stop hook, the motor, the loading roller, the furnace roller and the furnace door are controlled by the control unit.

2. The heating furnace autonomous steel feeding system according to claim 1 is characterized in that: The loading roller also includes a second laser rangefinder, which is arranged at the loading roller between the heating furnace and the loading platform. The distance between the first laser rangefinder and the second laser rangefinder is greater than the longest standard billet length. The second laser rangefinder is connected to the control unit and is used to cooperate with the first laser rangefinder to detect the billet length.

3. The heating furnace autonomous steel feeding system according to claim 2 is characterized in that: Also included is an alarm device, which is connected to the control unit and controlled by the control unit.

4. The heating furnace autonomous steel feeding system according to claim 2, characterized in that: The loading roller also includes a photoelectric tube, which is arranged at the loading roller between the heating furnace and the second laser rangefinder; the roller in the furnace also includes a first encoder, which is arranged on the roller of the roller in the furnace and is used to monitor the number of revolutions of the roller; the photoelectric tube and the first encoder are connected to the control unit, which are used to cooperate with the control unit to control the position of the blank after entering the heating furnace.

5. The heating furnace autonomous steel feeding system according to any one of claims 2 to 4, characterized in that: The heating furnace also includes a third laser rangefinder, which is arranged in the heating furnace at a position corresponding to the collision head and is used to detect the position of the blank in the heating furnace.

6. The heating furnace autonomous steel feeding system according to claim 1, characterized in that: The motor is provided with a second encoder for monitoring the number of revolutions of the motor.

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