A heating furnace door position detection device

Abstract

The utility model belongs to the heating furnace door position detection device in the technical field of steel smelting heating furnace. The furnace door (7) is connected hydraulic lift cylinder (4) through furnace door chain (5), the heavy hammer (3) is connected furnace door chain (5) through the steel wire rope (8), the heavy hammer (3) is installed in the sliding slot (2), the heavy hammer (3) is provided with the stop iron (10), and the support (1) near the heavy hammer (3) is provided with the limit switch (12). The heating furnace door position detection device can conveniently and reliably realize heating furnace door position detection, and is far away from the high-temperature area of the furnace door, so as to solve the problem that the main controller is used to detect the furnace door position in the prior art, which leads to easy damage under high temperature, avoid the occurrence of heat stroke accidents in the replacement of operating personnel under high temperature, and effectively guarantee the personal safety of operating personnel.

Description

Technical Field

[0001] This utility model belongs to the field of steel smelting heating furnace technology, and more specifically, it relates to a heating furnace door position detection device. Background Technology

[0002] In the steel industry, the heating furnace, as the preceding process in the rolling mill, primarily heats steel billets to over 1000℃. This high temperature improves the metal's microstructure and properties, accelerates chemical reactions, and achieves the required temperatures for various steel grades. The billets are then fed into the rolling mill for rolling to produce steel of different specifications. Traditionally, the furnace door's position is detected using a master controller. This controller is typically installed at the center of the main sprocket shaft and connected to the sprocket via a flexible coupling. The door's upper, middle, and lower positions are determined by detecting the number of rotations of the main sprocket. However, the master controller is installed at the top of the furnace door, constantly exposed to high temperatures (up to 80℃, especially in summer). This high temperature frequently damages the controller and its wiring, resulting in a high failure rate and requiring replacement before the end of its service life. Furthermore, personnel performing tasks in this high-temperature environment for extended periods are highly susceptible to heatstroke.

[0003] Existing technology includes a device and method for detecting the position of a furnace door, published under publication number CN106500510B, which belongs to the field of automatic furnace door control technology. The furnace door position detection device includes a displacement sensor, a reflective device, a sliding device, and a support device. The support device is used to fix the displacement sensor and the sliding device; at least two displacement sensors are fixed to the bracket of the support device. The sliding device is fixed on two circular guide rails. The reflective device is fixed on the second sliding block of the sliding device. A movable pull rod is also included to move the sliding device along the guide rails. Based on the detection method of the above device, when the transmission chain drives the furnace door to open and close, it simultaneously moves the sliding device and the reflective device up and down via the movable pull rod. When the reflective device passes the displacement sensor, the displacement sensor returns a detection signal to the host computer. The advantage is that it effectively improves the accuracy and reliability of furnace door position detection without requiring modification to the furnace door body or the transmission method.

[0004] However, this technology does not address the technical issues and solutions of this application. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a heating furnace door position detection device that is simple in structure, can conveniently and reliably realize the position detection of the heating furnace door, and is far away from the high temperature area at the furnace door, in order to solve the problem that the existing technology uses a master controller to detect the position of the furnace door, which is easily damaged by high temperature. This avoids the occurrence of heatstroke accidents of operators changing the door at high temperatures and effectively protects the personal safety of operators.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] This utility model is a furnace door position detection device. The furnace door is connected to a hydraulic lifting cylinder via a furnace door chain. A counterweight is connected to the furnace door chain via a steel wire rope. The counterweight is installed in a slide groove, and a stop is set on the counterweight. A limit switch is set in the bracket near the counterweight.

[0008] The slide is arranged on the ground, and the support is parallel to the slide.

[0009] The stop is perpendicular to the weight and extends to the support position.

[0010] The bracket is equipped with multiple limit switches at intervals from top to bottom.

[0011] The furnace door is equipped with multiple furnace door chains, each chain passing over a corresponding pulley and connecting to a corresponding hydraulic lifting cylinder.

[0012] The outer ring of the slide groove is equipped with a movable clamp, which is fixedly connected to the counterweight and the stop is fixedly connected to the clamp.

[0013] One end of the steel wire rope is connected to the furnace door chain, and the other end of the steel wire rope passes around the corresponding second pulley and extends into the chute to connect to the counterweight.

[0014] The horizontal cross-section of the groove has a U-shaped structure.

[0015] The hammer is equipped with a hammer pulley.

[0016] The aforementioned chute and support are both arranged vertically on the ground.

[0017] The working principle and beneficial effects of this utility model are as follows:

[0018] The furnace door position detection device of this utility model connects the furnace door to a hydraulic lifting cylinder via a furnace door chain. Therefore, by controlling the extension and retraction of the hydraulic lifting cylinder, the furnace door can be raised and lowered. During the raising and lowering of the furnace door, a counterweight moves synchronously. The counterweight is installed in a slide groove, ensuring that it can only move vertically and will not disengage from the vertical limit of the slide groove. This achieves synchronous raising and lowering of the furnace door and the counterweight. When the hydraulic lifting cylinder of the furnace door extends and retracts, driving the furnace door to rise and fall, the steel wire rope pulls the counterweight, which moves synchronously up and down with the furnace door chain. Multiple limit switches are installed on the support, each corresponding to a position on the furnace door. When the stop on the counterweight touches the corresponding limit switch, the limit switch sends different signals to the display screen, allowing on-site personnel to easily and accurately determine the current position of the furnace door. Since both the support and the counterweight are located far from the furnace door, the limit switches are no longer affected by high temperatures, thus avoiding the frequent damage to the master controller for detecting the furnace door position as in existing technologies, and eliminating the need for on-site personnel to perform replacement work in high-temperature environments. Attached Figure Description

[0019] The following is a brief explanation of the contents depicted in the accompanying drawings and the markings therein:

[0020] Figure 1 This is a schematic diagram of the structure of the furnace door position detection device of the present invention;

[0021] Figure 2 This is a top view of the sliding groove portion of the furnace door position detection device of the present invention;

[0022] The labels in the attached diagram are as follows: 1. Support; 2. Slide groove; 3. Counterweight; 4. Hydraulic lifting cylinder; 5. Furnace door chain; 6. Pulley; 7. Furnace door; 8. Wire rope; 9. Clamp; 10. Stop; 11. Counterweight pulley; 12. Limit switch; 13. Ground; 14. Second pulley. Detailed Implementation

[0023] The following description, with reference to the accompanying drawings, provides a more detailed explanation of the specific embodiments of this utility model, including the shape and structure of each component, the relative positions and connections between the parts, the functions and working principles of each part:

[0024] As attached Figure 1 Appendix Figure 2As shown, this utility model is a furnace door position detection device. The furnace door 7 is connected to a hydraulic lifting cylinder 4 via a furnace door chain 5. A counterweight 3 is connected to the furnace door chain 5 via a steel wire rope 8. The counterweight 3 is installed in a slide groove 2, and a stop 10 is installed on the counterweight 3. A limit switch 12 is installed in the bracket 1 near the counterweight 3. This structure addresses the shortcomings of the prior art by proposing an improved technical solution. The furnace door 7 is connected to the hydraulic lifting cylinder 4 via the furnace door chain 5. Therefore, by controlling the extension and retraction of the hydraulic lifting cylinder 4, the furnace door 7 can be raised and lowered. When the furnace door 7 rises and falls, the counterweight 3 rises and falls synchronously. The counterweight 3 is installed in the slide groove 2, ensuring that the counterweight 3 can only rise and fall vertically and will not deviate from the vertical limit of the slide groove 2. In this way, the synchronous rising and falling of the furnace door 7 and the counterweight 3 are achieved. When the hydraulic lifting cylinder 4 of the furnace door extends and retracts, driving the furnace door 7 to rise and fall, the steel wire rope 8 pulls the counterweight 3 to move synchronously up and down with the furnace door chain 5. Multiple limit switches are installed on the bracket 1, each corresponding to a position on the furnace door. When the stop 10 on the counterweight 3 touches the corresponding limit switch 12, the limit switch 12 sends different signals to the display screen, allowing on-site personnel to easily and accurately determine the current position of the furnace door 7. Both the bracket 1 and the counterweight 3 are positioned far from the furnace door 7; therefore, the limit switches 12 are no longer affected by high temperatures, and unlike existing technologies, the master controller for detecting the furnace door 5's position will not frequently fail, eliminating the need for on-site personnel to perform replacement work in high-temperature environments. The furnace door position detection device of this invention has a simple structure, can conveniently and reliably detect the furnace door's position, and is located far from the high-temperature area at the furnace door, solving the problem of easy damage due to high temperatures caused by using a master controller for detecting the furnace door's position in existing technologies. This avoids heatstroke accidents for operators during high-temperature replacement work, effectively ensuring the personal safety of operators.

[0025] The slide chute 2 is arranged on the ground 13, and the support 1 is parallel to the slide chute 2. In the above structure, the support and the slide chute are parallel, so the movement distance of the counterweight in the slide chute is accurately reflected as the movement distance of the stop iron 10 relative to the support, thus accurately reflecting the position of the furnace door 7.

[0026] The stop 10 is perpendicular to the counterweight 3 and extends to the support 1. Multiple limit switches 12 are spaced apart from top to bottom on the support 1. With this structure, as the stop moves relative to the support, it contacts different limit switches at different positions, and each limit switch corresponds to a furnace door position, thus accurately reflecting the furnace door's location. For example, if the furnace door has three positions: upper, middle, and lower, then three limit switches are correspondingly installed on the support: the uppermost limit switch corresponds to the upper position of the furnace door, the middle limit switch corresponds to the middle position of the furnace door, and the lowermost limit switch corresponds to the lower position of the furnace door, effectively meeting practical needs.

[0027] The furnace door 7 is equipped with multiple furnace door chains 5, each chain 5 passing over a corresponding pulley 6 and connecting to a corresponding hydraulic lifting cylinder 4. This structure, through multiple furnace door chains, reliably connects the furnace door, and the synchronous movement of these chains smoothly achieves the raising and lowering of the furnace door.

[0028] The outer ring of the slide chute 2 is fitted with a movable clamp 9, which is fixedly connected to the counterweight 3. A stop 10 is also fixedly connected to the clamp 9. The slide chute 2 has a U-shaped horizontal cross-section. A counterweight pulley 11 is installed on the counterweight 3. With this structure, during the lifting and lowering process of the counterweight, the clamp moves synchronously up and down. Since the stop 10 is fixedly connected to the clamp, the stop and the counterweight 3 move synchronously up and down.

[0029] One end of the steel wire rope 8 is connected to the furnace door chain 5, and the other end of the steel wire rope 8 passes over the corresponding second pulley 14 and extends into the slide groove 2 to connect to the counterweight 3. With this structure, the steel wire rope connects to the furnace door chain, allowing the steel wire rope to rise and fall synchronously with the furnace door chain. Both the slide groove 2 and the support 1 are vertically arranged on the ground 13. The slide groove and the support are fixedly installed and located away from the furnace door.

[0030] The furnace door position detection device of this utility model has a furnace door 7 connected to a hydraulic lifting cylinder 4 via a furnace door chain 5. Therefore, by controlling the extension and retraction of the hydraulic lifting cylinder 4, the furnace door 7 can be raised and lowered. When the furnace door 7 is raised and lowered, the counterweight 3 is raised and lowered synchronously. The counterweight 3 is installed in the slide groove 2 to ensure that the counterweight 3 can only be raised and lowered vertically and will not disengage from the vertical limit of the slide groove 2. In this way, the furnace door 7 and the counterweight 3 are raised and lowered synchronously. When the furnace door hydraulic lifting cylinder 4 extends and retracts to drive the furnace door 7 to rise and lower, the wire rope 8 pulls the counterweight 3 to move up and down synchronously with the furnace door chain 5. Multiple limit switches are set on the bracket 1, each limit switch corresponding to a position of the furnace door. When the stop 10 on the counterweight 3 touches the corresponding limit switch 12, the limit switch 12 sends different signals to the display screen, which makes it convenient for on-site personnel to accurately determine the current position of the furnace door 7. Both the bracket 1 and the counterweight 3 are located far away from the furnace door 7. Therefore, the limit switch 12 is no longer affected by high temperature, and the master controller for detecting the position of the furnace door 5 will not be frequently damaged as in the prior art. It does not require on-site personnel to perform replacement work in a high-temperature environment.

[0031] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A furnace door position detection device, characterized in that: The furnace door (7) is connected to the hydraulic lifting cylinder (4) via the furnace door chain (5). The counterweight (3) is connected to the furnace door chain (5) via the wire rope (8). The counterweight (3) is installed in the slide groove (2). A stop iron (10) is set on the counterweight (3). A limit switch (12) is set in the bracket (1) near the counterweight (3).

2. The furnace door position detection device according to claim 1, characterized in that: The slide (2) is arranged on the ground (13), and the bracket (1) is parallel to the slide (2).

3. The furnace door position detection device according to claim 1 or 2, characterized in that: The stop (10) is perpendicular to the hammer (3) and extends to the position of the bracket (1).

4. The furnace door position detection device according to claim 1 or 2, characterized in that: The bracket (1) is equipped with multiple limit switches (12) from top to bottom with gaps.

5. The furnace door position detection device according to claim 1 or 2, characterized in that: The furnace door (7) is equipped with multiple furnace door chains (5), and each furnace door chain (5) passes around the corresponding pulley (6) and connects to the corresponding hydraulic lifting cylinder (4).

6. The furnace door position detection device according to claim 1 or 2, characterized in that: The outer ring of the slide (2) is fitted with a clamp (9), the clamp (9) is fixedly connected to the counterweight (3), and the stop (10) is fixedly connected to the clamp (9).

7. The furnace door position detection device according to claim 1 or 2, characterized in that: One end of the wire rope (8) is connected to the furnace door chain (5), and the other end of the wire rope (8) passes around the corresponding second pulley (14) and extends into the chute (2) to connect to the counterweight (3).

8. The furnace door position detection device according to claim 6, characterized in that: The horizontal cross-section of the groove (2) is U-shaped.

9. The furnace door position detection device according to claim 6, characterized in that: The hammer (3) is provided with a hammer pulley (11).

10. The furnace door position detection device according to claim 2, characterized in that: The slide (2) and the bracket (1) are both arranged vertically on the ground (13).

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