Over-furnace and out-furnace laser distance detection device of walking beam furnace

Abstract

The utility model discloses a furnace passing and discharging laser distance detection device of a walking beam furnace, which belongs to the technical field of metallurgical equipment and comprises a furnace body, a walking beam, a steel discharging machine, a roller way and two laser detection devices, and each laser detection device comprises a laser emitting end for emitting induction laser and a laser receiving end for receiving the induction laser. And induction lasers formed by the two laser detection devices are arranged on the vertical plane of the furnace door of the furnace body in a crossed manner. Two sets of obliquely mounted laser detection devices are vertically mounted on the same vertical plane at the position close to a furnace door of a furnace body, so that each set of laser detection device detects two steel billets in the same row respectively without being shielded by the other steel billet, and the laser passing distance of the two steel billets is calculated respectively in the stepping process; and calculating the travel of the tapping machine according to the respective laser passing distance during tapping.

Description

Technical Field

[0001] The utility model belongs to the technical field of metallurgical equipment, in particular to a laser distance detection device for a walking-beam heating furnace. Background Art

[0002] In the production of wide and heavy plate, a walking-beam furnace heats incoming billets to a specific temperature to meet the rolling process requirements. The tapping machine then pushes the billets onto the roller table upon exiting the furnace. The placement of the billets on the roller table is crucial. The furnace typically holds two billets per row, which are then discharged sequentially according to the tapping sequence. When a billet reaches the rolling temperature and steps to the laser detection position on the furnace's tapping side, the distance the billet will pass through the laser detection is calculated. This calculation then determines the billet's intended travel distance and the tapping machine's advance stroke, ensuring that the billet lands in the center of the roller table.

[0003] Specifically, laser detection uses a pair of horizontally mounted laser transmitters and receivers located approximately 1 meter in front of the furnace door to determine whether a row of billets has arrived. The billets inside the furnace are continuously stepped forward by a walking beam at the furnace bottom based on the billet temperature and the laser signal. (The walking beam rises to lift all billets, advances a certain distance, then descends and returns to its original position.) Once the billet's distance from the laser is determined, the tapping machine's forward travel is calculated based on this distance, ensuring that the billets land in the center of the roller table after being tapped.

[0004] However, when there is a width difference between two billets in the same row, since the laser distance has been calculated during stepping, the laser distance must be manually modified according to the width difference between the two billets when discharging narrow billets in order to meet the required stroke of the steel tapping machine. This may result in inaccurate steel tapping positioning or even billet falling accidents due to failure to modify or incorrect modification. Utility Model Content

[0005] The purpose of the utility model is to provide a laser distance detection device for a walking beam heating furnace to solve the problems raised in the above-mentioned prior art.

[0006] Provided is a laser distance detection device for a walking beam heating furnace, comprising:

[0007] A furnace body, a walking beam, a steel-discharging machine, a roller table and two laser detection devices. The walking beam is arranged inside the furnace body, the steel-discharging machine is arranged between the furnace body and the roller table, and the two laser detection devices are arranged on both sides of the furnace body near the furnace door. The laser detection device includes a laser emitting end for emitting an induction laser and a laser receiving end for receiving the induction laser. The induction lasers formed by the two laser detection devices are cross-arranged on the vertical plane of the furnace door of the furnace body.

[0008] Furthermore, a position sensor is provided on the walking beam.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] By installing two oblique laser detection devices on the same vertical plane near the furnace door, each set of laser detection devices can detect two billets in the same row independently without being obstructed by the other billet. During the stepping process, the laser distance of each billet is calculated separately, and the stroke of the tapping machine is calculated based on the respective laser distances. This pair of cross-arranged inductive lasers ensures normal tapping even when there are width differences in billets in the same row, without the need to manually adjust the laser distance. This also avoids issues such as billet drop during tapping or inaccurate billet positioning after completion, which can occur due to insufficient advance of the tapping machine if manual adjustments are not made or are incorrect. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present drawings 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 present drawings. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0012] Figure 1 This is a schematic diagram of the overall structure of a laser distance detection device for a walking-beam heating furnace;

[0013] Figure 2 This is a structural layout diagram of the laser detection device from the main viewing angle.

[0014] In the figure: 1. furnace body; 2. walking beam; 3. tapping machine; 4. roller table; 5. laser detection device; 51. laser emitting end; 52. laser receiving end. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is described and illustrated below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely used to explain this application and are not intended to limit this application. Based on the embodiments provided in this application, all other embodiments obtained by those of ordinary skill in the art without making any creative efforts are within the scope of protection of this application.

[0016] Obviously, the drawings described below are merely examples or embodiments of the present application. Those skilled in the art can, without inventive effort, apply the present application to other similar scenarios based on these drawings. Furthermore, it is also understood that, although the effort involved in such a development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, changes in design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as an insufficiency of the content disclosed in this application.

[0017] However, unnecessary detailed descriptions may be omitted. For example, detailed descriptions of well-known matters and repetitive descriptions of substantially identical structures may be omitted. This is to avoid unnecessary redundancy in the following description and to facilitate understanding by those skilled in the art. Furthermore, the drawings and the following description are provided to facilitate a thorough understanding of this application by those skilled in the art and are not intended to limit the subject matter recited in the claims.

[0018] See also Figure 1-2 As shown, in an embodiment of the utility model, a laser distance detection device for a walking-beam heating furnace includes a furnace body 1, a walking beam 2, a steel-discharging machine 3, a roller table 4 and two laser detection devices 5. The walking beam 2 is arranged inside the furnace body 1, the steel-discharging machine 3 is arranged between the furnace body 1 and the roller table 4, and the two laser detection devices 5 are both arranged on both sides of the furnace body 1 near the furnace door. The laser detection device 5 includes a laser emitting end 51 for emitting an induction laser and a laser receiving end 52 for receiving the induction laser. The induction lasers formed by the two laser detection devices 5 are cross-arranged on the vertical plane of the furnace door of the furnace body 1.

[0019] A walking beam 2 is installed within the furnace body 1. Its movement gradually propels the billet toward the furnace door. When the billet reaches the furnace door, the tapping machine 3 drives the cylinder to propel the billet onto the roller table 4, which then transports the billet away. Two sets of laser detection devices 5, each consisting of a laser emitting terminal 51 and a laser receiving terminal 52, are located at lower and higher positions on either side of the furnace, forming two inductive laser beams arranged in a cross pattern on the vertical plane of the furnace door.

[0020] Because the sensing lasers are arranged in a cross pattern, each billet only comes into contact with one of the sensing lasers when two rows of billets pass simultaneously, thus avoiding the obstruction problem caused by single-channel laser sensing. This sensing method can simultaneously detect the signals of two billets in the same row and calculate the laser distance. This solves the problem of manually adjusting the laser distance before narrowing billets with different widths, and avoids the possibility of inaccurate steel tapping positioning or even billet drop accidents caused by failure to adjust or incorrect adjustment.

[0021] In a specific embodiment, the laser emitting ends 51 and the laser receiving ends 52 on both sides of the furnace body 1 are installed in an upper and lower cross-arrangement. The laser emitting end 51 at the upper position on the left side of the furnace body 1 emits laser light obliquely toward the laser receiving end 52 at the lower position on the right side of the furnace body 1 to detect the steel billet on the right side. Similarly, the laser emitting end 51 at the lower position on the left side of the furnace body 1 emits laser light obliquely toward the laser receiving end 52 at the upper position on the right side of the furnace body 1 to detect the steel billet on the left side. The laser distances on both sides of the furnace are calculated in combination with the stepping position of the walking beam.

[0022] Furthermore, a position sensor is provided on the stepping beam 2. When the stepping beam 2 steps, the value recorded by the position sensor in the horizontal direction when the stepping beam 2 rises to its position is X; when the billet passes the laser signal during the stepping process, the value recorded by the position sensor is Y; after the forward movement is completed, the value recorded by the position sensor is Z, and the distance of the entire step is ZX. If the laser signal is detected during this stepping process, the distance the billet passes the laser is ZY. If the laser signal has detected the billet at the beginning of the stepping, and the distance the billet passes the laser is too small during the last stepping, resulting in the steel-discharging machine 3 advancing to the limit and still not being able to lift the billet and then discharge the steel, it is necessary to take another step or half a step to meet the distance requirement of the steel-discharging machine 3. At this time, the distance the billet passes the laser is the distance calculated last time (ZY) plus the distance of this stepping (ZX).

[0023] After calculating the two laser distances for discharge, if the laser distances of the two billets can meet the stroke of the steel-discharging machine, the steel will be discharged according to the pre-set discharge order; if the laser distance of the wide billet can meet the stroke of the steel-discharging machine but the narrow billet cannot, a prompt will be displayed on the screen and the narrow billet cannot be discharged first. After the wide billet is discharged, the steel will be discharged after taking one step or half a step and the steel will be discharged after the stroke of the steel-discharging machine is met.

[0024] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are merely examples, and any embodiments having substantially the same structure and effect as the technical concept within the scope of the present application are all included in the technical scope of the present application. In addition, without departing from the scope of the present application, any other embodiments that can be conceived by those skilled in the art and that combine some of the constituent elements in the embodiments are also included in the scope of the present application.

Claims

1. A laser distance detection device for a walking beam heating furnace, characterized in that: include: A furnace body (1), a walking beam (2), a steel tapping machine (3), a roller table (4), and two laser detection devices (5), wherein the walking beam (2) is arranged inside the furnace body (1), the steel tapping machine (3) is arranged between the furnace body (1) and the roller table (4), the two laser detection devices (5) are arranged on both sides of the furnace body (1) near the furnace door, the laser detection device (5) includes a laser emitting end (51) for emitting an induction laser and a laser receiving end (52) for receiving the induction laser, and the induction lasers formed by the two laser detection devices (5) are arranged crosswise on the vertical plane of the furnace door of the furnace body (1).

2. The laser distance detection device for a walking beam heating furnace according to claim 1, characterized in that: A position sensor is provided on the walking beam (2).

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