Molten steel temperature measuring device

Abstract

The utility model discloses a molten steel temperature measuring device, and belongs to the technical field of molten steel detection. The sampling device comprises a connecting pipe and a temperature measuring part arranged at the end part of the connecting pipe, a sampling assembly is arranged at one end, close to the temperature measuring part, of the connecting pipe, the sampling assembly comprises a mounting part arranged on the connecting pipe in a sleeving manner, and a cavity for mounting a sampling box is formed in the mounting part; a sample inlet communicated with the inner cavity of the sampling box is formed in one side, facing the temperature measuring component, of the cavity; an air hole is formed in the sampling box, so that an inner cavity of the sampling box is communicated with the chamber. The molten steel temperature measuring device integrates the temperature measuring function and the sampling function, and can complete the temperature measuring and sampling work at a time; the problem that temperature measurement and sampling of iron plants and steel plants cannot be commonly used in the past is solved, the labor intensity and the safety risk of workers are reduced, the smelting time of steelmaking is prolonged, and the steelmaking cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of molten steel detection, and more specifically relates to a molten steel temperature measuring device. Background Art

[0002] In steel production, vacuum refining plays a very important role in improving the quality of steel products, expanding varieties, reducing costs, and optimizing steel production processes. Directly sampling and measuring the temperature of smelted metals is an important means to understand the metallurgical process and molten iron quality.

[0003] At present, most steel enterprises use a single rapid thermocouple and molten iron sampler for temperature measurement and sampling respectively in steelmaking furnaces, using manual operation. Rapid thermocouples, also known as rapid temperature sensors, are widely used in the temperature measurement of molten steel, molten iron and other high-temperature molten metals in processes such as converters, electric furnace continuous casting, and secondary refining. For example, the patent CN208833374U discloses a molten steel continuous temperature measurement tube. The application includes a connector, a corundum tube and a black body tube. The lower end of the connector is provided with an external thread, and a receiving cavity is opened along the center of the lower end face, and a plurality of exhaust holes are opened on the wall of the receiving cavity; the upper end of the corundum tube is placed in the receiving cavity and is fastened into a whole by screws. There is a gap between the corundum tube and the receiving cavity of the connector, and the gap is connected to the exhaust hole to form an exhaust channel; a connecting nut is pre-buried on the upper part of the black body tube, and the connector is connected and fixed to the connecting nut by an external thread, and the junction between the connector and the black body tube is sealed by a fixed filler. This application has no redundant parts, is easy to install, has accurate connector alignment, and has good temperature measurement effect of the temperature measuring tube. It can meet the actual needs of on-site production and has the advantages of simple structure, reasonable design, and easy manufacturing.

[0004] The molten iron sampler is suitable for quickly taking out samples from a molten iron ladle for spectral analysis in order to adjust the composition of the molten iron. It has the characteristics of simple structure and convenient application. For example, the patent CN209014318U discloses a sampler. The application includes a slag retaining cap, a guide tube, a sampling box and a coated sand shell. The coated sand shell is provided with a sampling port, an air vent, a connecting end and an inner cavity. The outer side of the sampling port is covered with a slag retaining cap, the air vent is located on the inner side of the connecting end, the slag retaining cap is located on the outer side of the guide tube, the guide tube is located on the inner side of the sampling port, and the sampling box is located in the inner cavity. The sampler of the application has good air permeability, is easy to demold after sampling, does not require manual knocking, has good heat dissipation, shortens the overall time of sampling and testing, reduces the smelting time of steelmaking, and has the advantages of simple structure, reasonable design and easy manufacturing.

[0005] Although the above application can realize the sampling and temperature measurement operations of smelted metal, the temperature measurement and molten steel sampling are carried out separately, which increases the number and time of measurement and sampling, reduces the overall production efficiency, and increases the cost of steelmaking. Utility Model Content

[0006] 1. Problems to be solved

[0007] In view of the problem that in the existing operation, the sampling and temperature measurement of smelting metal are performed separately, which reduces the overall production efficiency and increases the cost. The utility model provides a molten steel temperature measuring device, which is provided with a sampling component on the upper part. 2. Technical solution

[0008] In order to solve the above problems, the technical solution adopted by the utility model is as follows:

[0009] The utility model discloses a molten steel temperature measuring device, comprising a connecting pipe and a temperature measuring component arranged at the end of the connecting pipe, wherein a sampling assembly is arranged at one end of the connecting pipe close to the temperature measuring component.

[0010] The sampling assembly comprises a mounting portion sleeved on the connecting tube, wherein the mounting portion has a chamber for mounting the sampling box;

[0011] A sampling port communicating with the inner cavity of the sampling box is arranged on one side of the chamber facing the temperature measuring component; and an air hole is opened on the sampling box so that the inner cavity of the sampling box and the chamber are communicated with each other.

[0012] Furthermore, the sampling box comprises two upper and lower parts which are interlocked with each other, and the side walls of the two parts are provided with notches, and the corresponding notches on the two parts constitute the air holes.

[0013] Furthermore, the connecting pipe includes an inner sleeve and an outer sleeve sleeved on the inner sleeve; wherein the temperature measuring component is arranged at the end of the inner sleeve, and the mounting part is sleeved on the inner sleeve; the outer sleeve is divided into two sections, which are respectively located on both sides of the mounting part.

[0014] Furthermore, the inner sleeve and the outer sleeve are both paper tubes, and an interference fit is adopted between the inner and outer sleeves.

[0015] Furthermore, the sum of the lengths of the outer sleeve and the mounting portion is 350 mm-400 mm.

[0016] Furthermore, refractory mud is provided at the connection between the installation portion and the outer sleeves on both sides.

[0017] Furthermore, the material of the installation part is resin sand or coated sand.

[0018] Furthermore, the sampling box is in the shape of a racket as a whole, and the upper and lower parts are pre-connected by glue.

[0019] Furthermore, a flow guide tube is provided at the sample inlet, one end of which extends into the sampling box, and the other end of which is located outside the mounting portion and is equipped with a protective cap.

[0020] Furthermore, the temperature measuring component is a temperature measuring thermocouple.

[0021] 3. Beneficial effects

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] (1) The utility model provides a molten steel temperature measuring device, which is provided with a temperature measuring component and a sampling component on a connecting pipe, integrating temperature measurement and sampling functions, and can complete temperature measurement and sampling work at one time; it solves the problem that temperature measurement and sampling in iron and steel plants cannot be used interchangeably in the past, reduces the labor intensity and safety risks of workers, improves the smelting time of steelmaking, and reduces the cost of steelmaking.

[0024] (2) The utility model provides a molten steel temperature measuring device, wherein the sampling box adopts a split design, and is composed of an upper and a lower part that are buckled together, which is beneficial to the later sample removal operation; at the same time, by providing air holes at the junction of the upper and lower parts, the molten steel can flow into and fill the inner cavity of the sampling box more easily, which is beneficial to ensuring the overall shape of the sample block.

[0025] (3) The utility model provides a molten steel temperature measuring device, wherein the mounting portion is formed by condensation of coated sand, so that substantially no smoke is generated during the temperature measurement and sampling process. After the temperature measurement and sampling are successful, the device can be easily decomposed on a workbench, and the sample block is smooth and full without burrs, which can effectively shorten the time of the test and analysis process.

[0026] (4) The utility model provides a molten steel temperature measuring device, which can effectively protect the inner sleeve by providing an outer sleeve on the inner sleeve to prevent the inner sleeve from melting due to high temperature during the detection time; at the same time, the outer sleeve is divided into two ends, which are respectively located on both sides of the installation part, so that the installation part can be effectively positioned.

[0027] (5) In the utility model, a molten steel temperature measuring device is provided with refractory mud at the connection between the mounting portion and the outer sleeves on both sides, which can effectively ensure the stability and sealing of the connection between the mounting portion and the outer sleeves. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a structural schematic diagram of a molten steel temperature measuring device of the utility model;

[0029] Figure 2 This is a front view of a molten steel temperature measuring device of the utility model;

[0030] Figure 3 It is a cross-sectional view of a molten steel temperature measuring device of the utility model;

[0031] Figure 4 It is a side view of a molten steel temperature measuring device of the utility model;

[0032] Figure 5 for Figure 3 A local enlarged schematic diagram of point A in the middle.

[0033] In the figure: 1, connecting pipe; 11, inner sleeve; 12, outer sleeve; 2, temperature measuring component;

[0034] 3. Sampling assembly; 31. Mounting portion; 311. Chamber; 32. Sampling box; 33. Inlet. DETAILED DESCRIPTION

[0035] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings.

[0036] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] The utility model is further described below in conjunction with specific embodiments.

[0038] like Figure 1 As shown, a molten steel temperature measuring device of this embodiment includes a connecting pipe 1 and a temperature measuring component 2 and a sampling assembly 3 arranged on the connecting pipe 1. The temperature measuring component 2 is used to detect the temperature of the molten steel, and the sampling assembly 3 is used to perform sampling operations on the molten steel.

[0039] Preferably, the temperature measuring component 2 is a temperature measuring thermocouple.

[0040] The temperature measuring device of this embodiment integrates the functions of temperature measurement and sampling, and can complete the temperature measurement and sampling work at one time, which solves the problem that the temperature measurement and sampling of iron and steel plants cannot be used universally in the past. It reduces the labor intensity and safety risks of workers, improves the smelting time of steelmaking, and reduces the cost of steelmaking.

[0041] Specifically, refer to Figure 2 As shown, the connecting tube 1 is preferably a paper tube, which includes an inner sleeve 11 and an outer sleeve 12. The temperature measuring component 2 is arranged at the end of the inner sleeve 11; the outer sleeve 12 is sleeved on the inner sleeve 11, and the end of the outer sleeve 12 is aligned with the end of the inner sleeve 11 provided with the temperature measuring component 2, which is used to protect the inner sleeve 11 to prevent it from melting due to high temperature, so that the temperature measurement and sampling operations cannot be carried out normally.

[0042] Furthermore, the outer sleeve 12 is divided into two sections, and the two sections clamp the sampling assembly 3 in the middle to complete the installation and positioning of the sampling assembly 3. Preferably, an interference fit is adopted between the inner and outer sleeves.

[0043] refer to Figure 3 , Figure 5 As shown, the sampling assembly 3 includes a mounting portion 31 and a sampling box 32. The mounting portion 31 is sleeved on the inner sleeve 11 and is close to one end of the temperature measuring component 2. At the same time, refractory mud is provided at the connection between the mounting portion 31 and the outer sleeves 12 on both sides to ensure the stability and sealing of the connection between the mounting portion 31 and the outer sleeves 12.

[0044] A chamber 311 is provided in the mounting portion 31, and the sampling box 32 is located in the chamber 311. At the same time, a sampling port 33 is provided on the side of the chamber 311 facing the temperature measuring component 2. A flow guide tube may be provided at the sampling port 33, one end of which extends into the sampling box 32 and the other end is located outside the mounting portion 31, so that the molten steel can flow into the sampling box 32 through the flow guide tube to complete the sampling operation.

[0045] In order to ensure that the outer sleeve 12 can effectively protect the inner sleeve 11, when the temperature measuring component 2 is located at a specified depth in the molten steel, part of the outer sleeve 12 is still located above the surface of the molten steel. For the convenience of description, the sum of the lengths of the two outer sleeves 12 and the mounting portion 31 is recorded as L1, that is, L1 must be greater than the measurement and sampling depth of the molten steel, so that during the sampling process, the inner sleeve 11 is actually not in contact with the molten steel.

[0046] Preferably, the value range of L1 is 350mm-400mm. This is because under normal circumstances, the temperature measurement and sampling depth of molten steel is about 300mm, and if it exceeds 50-100mm, it can have a certain heat insulation effect on the area of ​​the inner sleeve 11 located above the molten steel surface, preventing the inner sleeve 11 from melting due to heat radiation.

[0047] In addition, a protective cap may be provided at the end of the flow guide tube to prevent slag. Preferably, the protective cap is an aluminum cap. This is because aluminum has a lower melting point and can be used as a deoxidizer after being dissolved, thereby effectively preventing oxidation of the molten steel.

[0048] As an implementation of the sampling box 32, in this embodiment, the sampling box 32 adopts a split structure to facilitate the subsequent opening operation.

[0049] Specifically, refer to Figure 5As shown, it includes two parts, upper and lower, which are interlocked, and the side walls (walls in contact with each other) of the two parts are both provided with notches, and the corresponding notches on the two parts form pores, so that the inner cavity of the sampling box 32 is interconnected with the chamber 311. This ensures that the molten steel flows into and fills the inner cavity of the sampling box 32 more easily, which is beneficial to ensure the overall shape of the sample block and improve the detection efficiency.

[0050] Furthermore, the sampling box 32 is in the shape of a racket as a whole, and the upper and lower parts are pre-connected by glue.

[0051] In this embodiment, the mounting portion 31 can be formed by condensing resin sand or coated sand, preferably coated sand. The mounting portion 31 made of coated sand can protect the internal sampling box 32 in a short time; at the same time, the mounting portion 31 made of coated sand has good air permeability and fast heat dissipation, which can accelerate the cooling and forming of the sample in the sampling box 32, thereby shortening the sampling. After the sampling is completed, the coated sand soaked in high-temperature molten steel becomes loose, and the coated sand shell will fall off when it is lightly knocked on the ground; combined with the split design of the sampling box 32, the sample can be easily removed.

[0052] A molten steel temperature measuring device of this embodiment is provided with a temperature measuring component 2 and a sampling component 3 on a connecting pipe 1, integrating temperature measuring and sampling functions, which can greatly improve work efficiency. The temperature measuring device is applied in actual production, and the sampling time can be saved by 2-3 minutes per furnace on average, and the output of the steelmaking process can be increased by 2-3 furnaces (about 200 tons of steel) per day.

[0053] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A molten steel temperature measuring device, comprising a connecting pipe (1) and a temperature measuring component (2) arranged at the end of the connecting pipe (1), characterized in that: The end of the connecting pipe (1) close to the temperature measuring component (2) is provided with a sampling assembly (3). The sampling assembly (3) comprises a mounting portion (31) sleeved on the connecting tube (1), wherein the mounting portion (31) has a chamber (311) for mounting a sampling box (32); A sampling port (33) communicating with the inner cavity of the sampling box (32) is provided on the side of the chamber (311) facing the temperature measuring component (2); and an air hole is provided on the sampling box (32) so that the inner cavity of the sampling box (32) and the chamber (311) are communicated with each other.

2. A molten steel temperature measuring device according to claim 1, characterized in that: The sampling box (32) comprises two parts, an upper part and a lower part, which are buckled together. The side walls of the two parts are provided with notches, and the corresponding notches on the two parts form the air holes.

3. A molten steel temperature measuring device according to claim 1 or 2, characterized in that: The connecting pipe (1) comprises an inner sleeve (11) and an outer sleeve (12) sleeved on the inner sleeve (11); wherein the temperature measuring component (2) is arranged at the end of the inner sleeve (11), and the mounting portion (31) is sleeved on the inner sleeve (11); the outer sleeve (12) is divided into two sections, which are respectively located on two sides of the mounting portion (31).

4. A molten steel temperature measuring device according to claim 3, characterized in that: The inner sleeve (11) and the outer sleeve (12) are both paper tubes, and an interference fit is adopted between the inner and outer sleeves.

5. A molten steel temperature measuring device according to claim 4, characterized in that: The sum of the lengths of the outer sleeve (12) and the mounting portion (31) is 350 mm to 400 mm.

6. A molten steel temperature measuring device according to claim 3, characterized in that: Refractory mud is provided at the connection between the mounting portion (31) and the outer sleeves (12) on both sides.

7. A molten steel temperature measuring device according to claim 1 or 2, characterized in that: The material of the mounting portion (31) is resin sand or coated sand.

8. A molten steel temperature measuring device according to claim 3, characterized in that: The sampling box (32) is in the shape of a racket as a whole, and the upper and lower parts are pre-connected by glue.

9. A molten steel temperature measuring device according to claim 1, characterized in that: A flow guide tube is provided at the sample inlet (33), one end of which extends into the sampling box (32), and the other end of which is located outside the mounting portion (31) and is provided with a protective cap.

10. A molten steel temperature measuring device according to claim 3, characterized in that: The temperature measuring component (2) is a temperature measuring thermocouple.

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