A temperature measuring device for a steelmaking furnace

Abstract

This invention relates to the field of temperature measuring technology and provides a temperature measuring device for a steelmaking furnace, including a temperature measuring box, a handle, a temperature measuring gun tube, and a temperature measuring probe. The handle is located below the temperature measuring box, the temperature measuring gun tube is located at the front end of the temperature measuring box, and the temperature measuring probe is located at the end of the temperature measuring gun tube away from the handle. An adjustable bending tube is provided between the temperature measuring gun tube and the temperature measuring probe. The bending tube has multiple sections, and the multiple sections of the bending tube are driven in the same way. In this invention, the temperature measuring probe extends to directly above the furnace opening. By slowly releasing the tension of one or more originally tightened pull rings, the rotating shaft rotates in the opposite direction under the action of a coil spring, causing the bending tube to bend downwards, so that the temperature measuring probe is inserted into the molten steel in the furnace. If the molten steel is shallow, the bending degree of the bending tube at the end away from the temperature measuring probe can be larger, while the bending degree of other ends can be smaller. The operation is simple and effectively avoids the possibility of burns to workers during manual operation.

Description

Technical Field

[0001] This invention relates to the field of temperature measuring technology, and more particularly to a temperature measuring device for a steelmaking furnace. Background Technology

[0002] The principle of a steelmaking furnace is to put iron ore and other additives into the furnace, and under high temperature conditions, through a chemical reaction, transform the iron ore into steel. Steel is a ferroalloy with a low carbon content, typically containing 0.2% to 2.1% carbon, as well as other alloying elements. Due to its excellent mechanical properties, it is widely used in modern industry. Currently, for furnace temperature monitoring, a lifting mechanism is typically used to drive the temperature measuring gun up and down. During temperature measurement, the temperature measuring gun is lowered until it is inserted into the molten steel in the refining furnace; after measurement, the temperature measuring gun is raised to remove it from the molten steel.

[0003] For example, a steelmaking furnace temperature measuring device, patent number "CN104990635A", includes a main body, a high-temperature sensor at one end of the main body, a heat-insulating handle at the corner of the main body, a data transmission port at one end of the heat-insulating handle, and a corner reinforcement ring at the other end of the heat-insulating handle. The main body is made of high-temperature resistant insulating material, and the heat-insulating handle is made of high-strength heat-insulating material. Because the main body of the steelmaking furnace temperature measuring device of this invention is made of high-temperature resistant insulating material, damage to the component from the heat during steelmaking is avoided, and safety accidents caused by heat transfer are also prevented. Because the heat-insulating handle is made of high-strength heat-insulating material, user safety is effectively guaranteed.

[0004] However, in the existing technology, when using a handheld thermometer, the operator needs to hold one end of the thermometer and extend the other end into the steel furnace, inserting the temperature measuring head at the front of the thermometer into the molten steel. If the molten steel is too low, the operator needs to get closer to the furnace or tilt the handheld end upward so that the other end can go deeper into the steel furnace. At this time, the high temperature inside the steel furnace rises, which is more likely to cause burns to the operator's hands. Summary of the Invention

[0005] The purpose of this invention is to solve the problem in the prior art that when there is too little molten steel, workers need to get closer to the furnace or tilt one end of their hands upward so that the other end can go deeper into the furnace. At this time, the high temperature inside the furnace rises, which is more likely to cause burns to the workers' hands.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a steelmaking furnace temperature measuring device, comprising a temperature measuring processing box, a handle, a temperature measuring gun tube, and a temperature measuring probe. The handle is located below the temperature measuring processing box, the temperature measuring gun tube is located at the front end of the temperature measuring processing box, and the temperature measuring probe is located at the end of the temperature measuring gun tube away from the handle. A bend tube is adjustablely provided between the temperature measuring gun tube and the temperature measuring probe. The bend tube has multiple sections, and the multiple sections of the bend tube are driven in the same way. A ball is connected between one end of the temperature measuring gun tube and one end of the bend tube. The sleeve has an inner ball at the other end of the bent tube that is rotatably and sealingly connected to the inner side of the sleeve. The inner ball and the sleeve are rotatably connected by a rotating shaft. One end of the rotating shaft passes through the interior of the inner ball and is fixedly assembled with the inner ball. A coil spring is sleeved on the outer side of the inner end of the rotating shaft. A pull rope is provided at the end of the coil spring away from the rotating shaft. The other end of the pull rope passes through the interior of the temperature measuring gun tube and exits from below the end of the temperature measuring gun tube near the temperature measuring processing box. The temperature measuring probe is electrically connected to the temperature measuring processing box through a temperature measuring signal transmission cable.

[0007] In a preferred embodiment, the pull rope has a pull ring at one end near the temperature measuring box. The pull ring is located near the handle. The pull ring allows the operator to easily pull the ring while holding the handle to adjust the bending angle of the bent tube, making it more convenient to use.

[0008] In a preferred embodiment, a heat insulation plate is provided on the outer wall of the end of the temperature measuring gun tube near the temperature measuring and processing box. The handle and pull ring are located on the same side of the heat insulation plate. The heat insulation plate facilitates the protection of the staff's hands during measurement, preventing burns caused by high temperature heat waves.

[0009] In a preferred embodiment, the end of the inner ball away from the ball sleeve is connected to a connecting pipe, the connecting pipe is connected to the bent pipe, the diameter of the connecting pipe is smaller than that of the bent pipe, and an outer groove is provided below the ball sleeve to slide and adapt to the connecting pipe. The rotation angle of the bent pipe can be limited by the outer groove.

[0010] In a preferred embodiment, the lower end of the inner ball away from the connecting tube is chamfered, and the interior of the inner ball is not connected to the outer groove. By setting the end face of the inner ball to be chamfered, wear on the pull rope or temperature signal transmission cable is avoided. Both the outer sides of the inner ball and the ball sleeve are provided with fireproof coating.

[0011] In a preferred embodiment, a through groove is provided below the temperature measuring gun tube directly above the pull ring. One end of the pull rope, which is located inside the temperature measuring gun tube, passes through the through groove and extends outward. A guide shaft is rotatably provided inside the temperature measuring gun tube directly above the through groove. The pull rope is wound around the guide shaft. When the pull rope is pulled, the guide shaft can be rotated to guide the pull rope and reduce wear on the pull rope during the pulling process.

[0012] In a preferred embodiment, one end of the coil spring is linked to the rotating shaft, and the other end of the coil spring is assembled with the pull rope. When the coil spring is wound up, it has 1 to 2 coils. By setting the number of coils of the coil spring to be small, the coil spring can be fully unfolded by pulling the pull rope a small distance, thereby driving the rotating shaft to rotate.

[0013] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0014] 1. This invention extends a temperature probe directly above the furnace opening. By slowly releasing the tension of one or more originally tightened rings, the rotating shaft rotates in the opposite direction under the action of the coil spring, causing the bending tube to bend downwards, allowing the temperature probe to be inserted into the molten steel inside the furnace. If the molten steel is shallow, the bending degree of the bending tube at the end furthest from the temperature probe can be larger, while the other bending degrees can be smaller. The operation is simple and effectively avoids the possibility of workers being burned during manual operation.

[0015] 2. By setting the number of coils of the coil spring to be relatively small, the coil spring can be fully unfolded by pulling the rope a small distance, thereby driving the rotating shaft to rotate. Attached Figure Description

[0016] Figure 1 A perspective view of a steelmaking furnace temperature measuring device provided by the present invention;

[0017] Figure 2 A schematic diagram of the assembly of the temperature measuring gun tube and the heat insulation plate of a steelmaking furnace temperature measuring device provided by the present invention;

[0018] Figure 3 A schematic diagram of the internal structure of the temperature measuring gun tube and the bent tube assembly of a steelmaking furnace temperature measuring device provided by the present invention;

[0019] Figure 4 A schematic diagram showing the disassembled temperature measuring gun tube and bent tube of a steelmaking furnace temperature measuring device provided by the present invention;

[0020] Figure 5 This invention provides a schematic diagram of the assembly of the rotating shaft and coil spring of a steelmaking furnace temperature measuring device.

[0021] Legend:

[0022] 1. Temperature measurement processing box; 2. Handle; 3. Temperature measuring gun barrel; 4. Temperature measuring probe; 5. Bending tube; 6. Ball sleeve; 7. Inner ball; 8. Rotating shaft; 9. Coil spring; 10. Pull rope; 11. Temperature measurement signal transmission cable; 12. Pull ring; 13. Heat insulation plate; 14. Connecting pipe; 15. Outer groove; 16. Through groove; 17. Guide shaft. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see Figure 1-5 This invention provides a technical solution: a steelmaking furnace temperature measuring device, comprising a temperature measuring box 1, a handle 2, a temperature measuring gun 3, and a temperature measuring probe 4. The handle 2 is located below the temperature measuring box 1, the temperature measuring gun 3 is located at the front end of the temperature measuring box 1, and the temperature measuring probe 4 is located at the end of the temperature measuring gun 3 away from the handle 2. A bend tube 5 is adjustable between the temperature measuring gun 3 and the temperature measuring probe 4. The bend tube 5 has multiple sections, and the multiple sections of the bend tube 5 are driven in the same way. A ball sleeve 6 is connected between one end of the temperature measuring gun 3 and one end of the bend tube 5. The other end is provided with an inner ball 7 that is sealed and rotatably connected to the inner side of the ball sleeve 6. The inner ball 7 and the ball sleeve 6 are rotatably connected by a rotating shaft 8. One end of the rotating shaft 8 passes through the inside of the inner ball 7 and is fixedly assembled with the inner ball 7. A coil spring 9 is sleeved on the outer side of the inner end of the rotating shaft 8. A pull rope 10 is provided at the end of the coil spring 9 away from the rotating shaft 8. The other end of the pull rope 10 passes through the inside of the temperature measuring gun tube 3 and exits from below the end of the temperature measuring gun tube 3 near the temperature measuring processing box 1. The temperature measuring probe 4 is electrically connected to the temperature measuring processing box 1 through the temperature measuring signal transmission cable 11.

[0025] like Figure 1-5 As shown, the pull rope 10 has a pull ring 12 at one end near the temperature measuring and processing box 1. The pull ring 12 is located near the handle 2. The pull ring 12 makes it easy for the operator to pull the pull ring 12 while holding the handle 2 to adjust the bending angle of the bent tube 5, making it more convenient to use.

[0026] like Figure 1-5 As shown, a heat insulation plate 13 is provided on the outer wall of the end of the temperature measuring gun tube 3 near the temperature measuring and processing box 1. The handle 2 and the pull ring 12 are located on the same side of the heat insulation plate 13. The heat insulation plate 13 facilitates the protection of the staff's hands during measurement and avoids the high temperature heat wave from causing burns to the staff.

[0027] like Figure 1-5As shown, the end of the inner ball 7 away from the ball sleeve 6 is connected to a connecting pipe 14. The connecting pipe 14 is connected to the bent pipe 5. The diameter of the connecting pipe 14 is smaller than that of the bent pipe 5. The ball sleeve 6 is provided with an outer groove 15 that is slidably adapted to the connecting pipe 14. The rotation angle of the bent pipe 5 can be limited by the outer groove 15.

[0028] like Figure 1-5 As shown, the lower end of the inner ball 7 away from the connecting tube 14 is chamfered. The inner ball 7 is not connected to the outer groove 15. By setting the end face of the inner ball 7 to be chamfered, wear on the pull rope 10 or the temperature measurement signal transmission cable 11 is avoided. The outer sides of the inner ball 7 and the ball sleeve 6 are both provided with fireproof coating.

[0029] like Figure 1-5 As shown, a through groove 16 is provided below the temperature measuring gun tube 3 directly above the pull ring 12. One end of the pull rope 10, which is located inside the temperature measuring gun tube 3, passes through the through groove 16 and extends outward. A guide shaft 17 is rotatably provided inside the temperature measuring gun tube 3 directly above the through groove 16. The pull rope 10 is wound around the guide shaft 17. When the pull rope 10 is pulled, the guide shaft 17 can be rotated through the guide shaft 17, thereby guiding the pull rope 10 and reducing the wear of the pull rope 10 during the pulling process.

[0030] like Figure 1-5 As shown, one end of the coil spring 9 is linked to the rotating shaft 8, and the other end of the coil spring 9 is assembled with the pull rope 10. When the coil spring 9 is wound up, the number of coils is 1 to 2 layers. By setting the number of coils of the coil spring 9 to be less, the coil spring 9 can be fully unfolded by pulling the pull rope 10 a small distance, thereby driving the rotating shaft 8 to rotate.

[0031] Working principle: When performing temperature measurement, the operator can hold the handle 2 and bring the temperature probe 4 at the front end of the temperature gun barrel 3 close to the furnace opening. Then, they can simultaneously pull multiple pull ropes 10, shortening the length of the pull ropes 10 inside the temperature gun barrel 3. This will pull the coil spring 9, straightening it. During the pulling process, the rotating shaft 8 rotates, which in turn drives the corresponding bending tube 5 to rotate, flattening the temperature probe 4 and extending it directly above the furnace opening. Slowly releasing the force of one or more pull rings 12, the rotating shaft 8 rotates in the opposite direction under the action of the coil spring 9, causing the bending tube 5 to bend downwards, allowing the temperature probe 4 to be inserted into the molten steel in the furnace. If the molten steel is shallow, the bending degree of the bending tube 5 at the end furthest from the temperature probe 4 can be larger, while the other bending degrees can be smaller. The operation is simple and effectively avoids the possibility of burns to the operator during manual operation.

[0032] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A temperature measuring device for a steelmaking furnace, comprising a temperature measuring box (1), a handle (2), a temperature measuring gun (3), and a temperature measuring probe (4), wherein the handle (2) is disposed below the temperature measuring box (1), the temperature measuring gun (3) is disposed at the front end of the temperature measuring box (1), and the temperature measuring probe (4) is disposed at the end of the temperature measuring gun (3) away from the handle (2), characterized in that, An adjustable bend tube (5) is provided between the temperature measuring gun tube (3) and the temperature measuring probe (4). The bend tube (5) has multiple sections, and the multiple sections of the bend tube (5) are driven in the same way. A ball sleeve (6) is provided connecting one end of the temperature measuring gun tube (3) and one end of the bend tube (5). The other end of the bend tube (5) is provided with an inner ball (7) that is rotatably and sealingly connected to the inside of the ball sleeve (6). The inner ball (7) and the ball sleeve (6) are rotatably connected by a rotating shaft (8). One end of the rotating shaft (8) passes through the inside of the inner ball (7) and is connected to the inner ball (7). The ball (7) is fixedly assembled. A coil spring (9) is sleeved on the outer side of one end of the rotating shaft (8). A pull rope (10) is provided at the end of the coil spring (9) away from the rotating shaft (8). The other end of the pull rope (10) passes through the inside of the temperature measuring gun tube (3) and exits below the end of the temperature measuring gun tube (3) near the temperature measuring processing box (1). The temperature measuring probe (4) is electrically connected to the temperature measuring processing box (1) through a temperature measuring signal transmission cable (11). A pull ring (12) is provided at the end of the pull rope (10) near the temperature measuring processing box (1). The pull ring (12) is located on the side near the handle (2); the outer wall of the end of the temperature measuring gun tube (3) near the temperature measuring processing box (1) is provided with a heat insulation plate (13), and the handle (2) and the pull ring (12) are located on the same side of the heat insulation plate (13); the end of the inner ball (7) away from the ball sleeve (6) is connected to a connecting pipe (14), the connecting pipe (14) is connected to the bent pipe (5), the diameter of the connecting pipe (14) is smaller than that of the bent pipe (5), and an outer sleeve (6) is provided below the ball sleeve (6) to slide and adapt to the connecting pipe (14). The inner ball (7) is chamfered at the end away from the connecting pipe (14), and the inner ball (7) is not connected to the outer groove (15); a through groove (16) is provided below the temperature measuring gun tube (3) directly above the pull ring (12), and one end of the pull rope (10) is set inside the temperature measuring gun tube (3) through the through groove (16) and extends outward. A guide shaft (17) is rotatably provided inside the temperature measuring gun tube (3) directly above the through groove (16), and the pull rope (10) is wound around the guide shaft (17).

2. The steelmaking furnace temperature measuring device according to claim 1, characterized in that: One end of the coil spring (9) is linked to the rotating shaft (8), and the other end of the coil spring (9) is assembled with the pull rope (10). The coil spring (9) has 1 to 2 coils when it is wound up.

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