Solid-liquid interface detection device for temperature difference gradient method

Abstract

The utility model discloses a solid-liquid interface detection device for a temperature difference gradient method, which comprises a detection container, and the upper end of the detection container is provided with a solid-liquid interface detection device. According to the utility model, the multi-stage annular temperature measurement array structure is arranged in the straight direction in a layered manner to cover a possible interface range, the position of a solid-liquid interface is determined through temperature field distribution in a three-dimensional space, the temperature difference value of adjacent measurement points is analyzed, the position corresponding to the maximum gradient value is an interface candidate point, and the position corresponding to the maximum gradient value is an interface candidate point. The temperature change rate of candidate points is continuously monitored, coordinates are output after the interface position is confirmed, the multi-stage annular temperature measurement array structure extends into the detection container through the lifting assembly, and the indicating head arranged on the movable block can indicate the scale marking line, so that the position of the multi-stage annular temperature measurement array structure is determined. The hexagonal rotating head is rotated to enable the threaded sleeve to move on the screw rod, so that the spacing of the multi-stage annular temperature measurement array structure can be adjusted, and the multi-stage annular temperature measurement array structure can adapt to various containers from a small crucible to an industrial smelting furnace.

Description

Technical Field

[0001] This utility model relates to the field of solid-liquid interface detection technology, specifically a solid-liquid interface detection device for the temperature gradient method. Background Technology

[0002] The solid-liquid interface detection device using the temperature gradient method is an experimental device that monitors the interface position and morphology by precisely controlling and measuring the changes in the temperature gradient near the solid-liquid interface. Its core lies in actively establishing a temperature gradient field in a specific direction and capturing the temperature distribution characteristics of the interface region in real time through sensors.

[0003] The prior art, patent publication number CN221649664U, discloses the following technical solution: an online detection system for the solid-liquid interface of a crystallizing solution, comprising a crystallization tank, a driving device, a pulley device, a steel rope, a pressure sensor, and a weight. The pulley device is positioned above the crystallization tank, and the steel rope is wound around the pulley device, with its end connected to the weight. A heating element is installed inside the weight. The pressure sensor is connected to the steel rope to monitor the force on the rope. The driving device drives the pulley device to rotate, thereby raising and lowering the weight via the steel rope. The solid-liquid interface is determined by the change in the pressure sensor reading. This online detection system for the solid-liquid interface of a crystallizing solution solves the problem of inaccurate measurements caused by crystal adhesion to traditional contact sensor probes. It can automatically obtain real-time continuous interface data, reflecting the solid-liquid interface in real time, providing strong real-time data support for automated production control.

[0004] The above technical solution uses a lifting weight for single-point detection, which can only obtain single-point contact information and is difficult to reflect the overall interface shape, resulting in a mediocre detection effect. Utility Model Content

[0005] The purpose of this invention is to provide a solid-liquid interface detection device for the temperature gradient method, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a solid-liquid interface detection device for the temperature gradient method, comprising a detection container, wherein a solid-liquid interface detection device is installed on the upper end of the detection container.

[0007] The solid-liquid interface detection device includes a mounting frame, which is disposed on the outer surface of both ends of the detection container. A lifting assembly is installed inside the mounting frame, and a connecting frame is bolted to the outside of the lifting assembly. A multi-level annular temperature measuring array structure is installed on the upper end of the connecting frame, and the multi-level annular temperature measuring array structure is arranged in layers along the vertical direction.

[0008] The multi-level annular temperature measurement array structure includes concentric rings. Mounting holes are arranged circumferentially on the bottom side of each concentric ring, and temperature sensors are installed in each mounting hole. The temperature sensors are evenly distributed in each layer. Shielded cables are used for the temperature sensors, with wiring along the edges. A hexagonal rotating head is rotatably mounted at the bottom edge of the concentric rings via a bearing. A screw is mounted on the top side of the hexagonal rotating head, and a limiting plate is mounted on the top side of the screw. A threaded sleeve is threaded to the outer side of the screw. Limiting grooves are arranged on the inner wall of the threaded sleeve in the circumferential direction. The outer wall of the limiting plate is slidably connected to the inner wall of the limiting grooves. A sleeve rod is located at the bottom of the concentric rings and at a 120° angle to the hexagonal rotating head. A sleeve is slidably connected to the outer wall of each sleeve rod.

[0009] In the above technical solution, a multi-level annular temperature measurement array structure is arranged in a straight direction to cover the possible interface range. The solid-liquid interface position is determined by the temperature field distribution in three-dimensional space. The temperature difference between adjacent measurement points is analyzed, and the position corresponding to the maximum gradient value is the candidate interface point. The temperature change rate of the candidate points is continuously monitored, and the coordinates are output after confirming the interface position, thereby improving the interface positioning accuracy.

[0010] As a further preferred embodiment of this technical solution, an observation window is provided in the groove on one side of the outer wall of the detection container.

[0011] As a further preferred embodiment of this technical solution, the lifting assembly includes a threaded rod, which is mounted in the middle of a mounting frame on one side via a bearing. Limiting rods are fixedly connected to both the front and rear ends of the mounting frame on one side, and a motor is mounted at the bottom of the threaded rod.

[0012] In the above technical solution, the multi-stage annular temperature measuring array structure is extended into the detection container through the lifting component.

[0013] As a further preferred embodiment of this technical solution, guide rods are fixedly connected to both the front and rear ends of the mounting frame on the other side, and movable blocks are sleeved on the outer walls of the guide rods, threaded rods, and limiting rods.

[0014] As a further preferred embodiment of this technical solution, each side of the mounting frame is provided with scale markings, and the indicator head on the movable block indicates the scale markings.

[0015] In the above technical solution, the indicator head on the movable block can indicate the scale markings, thereby determining the position of the multi-level annular temperature measuring array structure.

[0016] As a further preferred embodiment of this technical solution, a heat insulation pad is provided on the top side of the concentric ring. The heat insulation pad is made of mica material and is used to reduce interlayer heat conduction.

[0017] As a further preferred embodiment of this technical solution, the concentric rings are made of high-temperature resistant ceramic material.

[0018] This invention provides a solid-liquid interface detection device for the temperature gradient method, which has the following features:

[0019] Beneficial effects:

[0020] (1) This utility model arranges a multi-level ring temperature measurement array structure in a straight direction to cover the possible interface range. The solid-liquid interface position is determined by the temperature field distribution in three-dimensional space. The temperature difference between adjacent measurement points is analyzed. The position corresponding to the maximum gradient value is the interface candidate point. The temperature change rate of the candidate point is continuously monitored. After confirming the interface position, the coordinates are output to improve the interface positioning accuracy.

[0021] (2) This utility model allows the threaded sleeve to move on the screw by rotating the hexagonal rotating head, thereby adjusting the spacing of the multi-level annular temperature measuring array structure, which can be adapted to various containers from small crucibles to industrial melting furnaces. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a cross-sectional view of the present invention;

[0024] Figure 3 This is a schematic diagram of the multi-level ring temperature measuring array structure of this utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the screw and threaded sleeve of this utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the bottom of the concentric ring of this utility model;

[0027] In the diagram: 1. Detection container; 11. Observation window; 2. Solid-liquid interface detection device; 21. Mounting frame; 22. Lifting assembly; 23. Connecting frame; 24. Multi-stage annular temperature measuring array structure; 241. Concentric ring; 242. Heat insulation pad; 243. Mounting hole; 244. Temperature sensor; 245. Hexagonal rotating head; 246. Screw; 2461. Limiting plate; 247. Threaded sleeve; 2471. Limiting groove; 248. Sleeve rod; 249. Sleeve; 221. Threaded rod; 222. Limiting rod; 223. Motor; 224. Scale mark; 225. Guide rod; 226. Movable block. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0029] This utility model provides a technical solution: such as Figure 1 As shown in this embodiment, a solid-liquid interface detection device for the temperature gradient method includes a detection container 1, an observation window 11 is provided in a groove on one side of the outer wall of the detection container 1, and a solid-liquid interface detection device 2 is installed on the upper end of the detection container 1.

[0030] like Figure 1 and Figure 2 As shown, the solid-liquid interface detection device 2 includes a mounting frame 21, which is set on the outer surface of both ends of the detection container 1. A lifting assembly 22 is installed inside the mounting frame 21. The lifting assembly 22 includes a threaded rod 221, which is set in the middle of one side of the mounting frame 21 by bearings. Limiting rods 222 are fixedly connected to both the front and rear ends of one side of the mounting frame 21. A motor 223 is installed at the bottom of the threaded rod 221. Guide rods 225 are fixedly connected to both the front and rear ends of the other side of the mounting frame 21. Movable blocks 226 are sleeved on the outer walls of the guide rods 225, the threaded rods 221, and the limiting rods 222. A scale mark 224 is provided on one side of the mounting frame 21. The indicator head on the movable block 226 indicates the scale mark 224. A connecting frame 23 is bolted to the outside of the lifting assembly 22. The multi-stage annular temperature measuring array structure 24 is extended into the detection container 1 through the lifting assembly 22, and the indicator head on the movable block 226 can indicate the scale mark 224, thereby determining the position of the multi-stage annular temperature measuring array structure 24.

[0031] like Figure 3-5As shown, a multi-level annular temperature measuring array structure 24 is installed on the upper end of the connecting frame 23. The multi-level annular temperature measuring array structure 24 is arranged in layers along the vertical direction. The multi-level annular temperature measuring array structure 24 includes concentric rings 241, which are made of high-temperature resistant ceramic material. A heat insulation pad 242 made of mica material is provided on the top side of the concentric rings 241 to reduce interlayer heat conduction. Mounting holes 243 are arranged circumferentially on the bottom side of the concentric rings 241. Temperature sensors 244 are installed in each mounting hole 243. The temperature sensors 244 are evenly distributed in each layer. The temperature sensors 244 use shielded cables that run along the edge. By arranging the multi-level annular temperature measuring array structure 24 in layers in the vertical direction, it covers the possible interface range. The position of the solid-liquid interface is determined by the temperature field distribution in three-dimensional space. The temperature difference between adjacent measurement points is analyzed, and the position corresponding to the maximum gradient value is the candidate interface point. The temperature change of the candidate point is continuously monitored. After confirming the interface position, the coordinates are output. A hexagonal rotating head 245 is mounted on the bottom edge of the concentric ring 241 via a bearing. A screw 246 is located on the top side of the hexagonal rotating head 245, and a limiting plate 2461 is located on the top side of the screw 246. A threaded sleeve 247 is threadedly connected to the outer side of the screw 246. Limiting grooves 2471 are arranged on the inner wall of the threaded sleeve 247 in the circumferential direction. The outer wall of the limiting plate 2461 is slidably connected to the inner wall of the limiting groove 2471. The concentric ring 241... At the bottom, at a 120° angle to the hexagonal rotating head 245, there is a sleeve 248. The outer wall of the sleeve 248 is slidably connected to a sleeve 249. The hexagonal rotating head 245 can be rotated by a tool, which in turn causes the threaded sleeve 247 to move on the screw 246. This allows for adjustment of the spacing of the multi-stage annular temperature measuring array structure 24, making it suitable for various containers from small crucibles to industrial melting furnaces. One rotation of the screw 246 produces an axial position of 0.8 mm.

[0032] This invention provides a solid-liquid interface detection device for the temperature gradient method. The specific working principle is as follows: A motor 223 drives a limiting rod 222 to rotate, causing the movable blocks 226 at both ends to rise and fall. This, in turn, causes the multi-stage annular temperature measuring array structure 24 to descend vertically until it is immersed in the solid-liquid mixture. The position of the indicator scale lines 224 on the movable blocks 226 is observed. All scale lines 244 are activated for 10 seconds of full-area temperature measurement. If the average temperature difference between the second layer and the third layer is detected to be 7℃ (threshold adjustable), and this is the maximum temperature difference value, it is considered a candidate interface point. The power supply to the sensors above the fourth layer is automatically turned off, retaining only the first sensor obtained from the third layer. The temperature change rate of the candidate point is continuously monitored. After confirming the interface position, the coordinates are output, and the data from each sensor is read through an external display instrument.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A solid-liquid interface detection device for the temperature gradient method, comprising a detection container (1), characterized in that: The detection container (1) is equipped with a solid-liquid interface detection device (2) at its upper end; The solid-liquid interface detection device (2) includes a mounting frame (21), which is set on the outer surface of both ends of the detection container (1). A lifting assembly (22) is installed inside the mounting frame (21). A connecting frame (23) is bolted to the outside of the lifting assembly (22). A multi-level annular temperature measuring array structure (24) is installed on the upper end of the connecting frame (23). The multi-level annular temperature measuring array structure (24) is arranged in layers along the vertical direction. The multi-level annular temperature measurement array structure (24) includes concentric rings (241). Mounting holes (243) are arranged circumferentially on the bottom side of the concentric rings (241). Temperature sensors (244) are installed in each mounting hole (243). The temperature sensors (244) are evenly distributed in each layer. Shielded cables are used for the temperature sensors (244) along the edge. A hexagonal rotating head (245) is rotatably mounted at the bottom edge of the concentric rings (241) via a bearing. A screw is provided on the top side of the hexagonal rotating head (245). (246) A limiting plate (2461) is provided on the top side of the screw (246). A threaded sleeve (247) is threadedly connected to the outside of the screw (246). Limiting grooves (2471) are arranged on the inner wall of the threaded sleeve (247) in the circumferential direction. The outer wall of the limiting plate (2461) is slidably connected to the inner wall of the limiting groove (2471). A sleeve rod (248) is provided at the bottom of the concentric ring (241) and at a 120° angle with the hexagonal rotating head (245). A sleeve (249) is slidably connected to the outer wall of the sleeve rod (248).

2. The solid-liquid interface detection device for the temperature gradient method according to claim 1, characterized in that: The detection container (1) has an observation window (11) in a groove on one side of its outer wall.

3. The solid-liquid interface detection device for the temperature gradient method according to claim 1, characterized in that: The lifting assembly (22) includes a threaded rod (221), which is mounted in the middle of a side mounting frame (21) via a bearing. Limiting rods (222) are fixedly connected to both the front and rear ends of the side mounting frame (21), and a motor (223) is installed at the bottom of the threaded rod (221).

4. The solid-liquid interface detection device for the temperature gradient method according to claim 1, characterized in that: On the other side, the mounting frame (21) is fixedly connected to both the front and rear ends with guide rods (225), and the outer walls of the guide rods (225), threaded rods (221), and limiting rods (222) are all fitted with movable blocks (226).

5. A solid-liquid interface detection device for the temperature gradient method according to claim 4, characterized in that: Each side of the mounting frame (21) is provided with a scale mark (224), and the indicator head on the movable block (226) indicates the scale mark (224).

6. The solid-liquid interface detection device for the temperature gradient method according to claim 1, characterized in that: The concentric ring (241) is provided with a heat insulation pad (242) on the top side. The heat insulation pad (242) is made of mica material and is used to reduce interlayer heat conduction.

7. A solid-liquid interface detection device for the temperature gradient method according to claim 1, characterized in that: The concentric rings (241) are made of high-temperature resistant ceramic material.

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