Temperature measuring device

Abstract

The utility model belongs to the technical field of non-contact temperature measurement, and particularly relates to a temperature measuring device. The temperature measuring device comprises a measuring tube which is arranged on the furnace wall in a penetrating mode, one end of the measuring tube is a radiation incident end extending into the furnace, and the other end of the measuring tube is a radiation emergent end located outside the furnace; the light shield is mounted at the radiation incident end; the thermodetector is arranged at the radiation emitting end of the measuring tube and is used for receiving the infrared radiation emitted by the radiation emitting end; the measuring pipe cools a measuring channel from two angles of ventilation cooling and heat source isolation so as to ensure long-term stable work; a light shield is arranged at the tail part of the measuring tube, so that most of heat radiation from a non-measured part can be shielded, the situation that unnecessary interference radiation enters a measuring channel and is mistakenly detected by a thermodetector is reduced, the cooling pressure of the measuring tube can be reduced, the cooling effect is improved, and the measuring accuracy is further ensured; the measuring tube is of an integral structure, so that disassembly and assembly are more convenient and flexible.

Description

Technical Field

[0001] This utility model belongs to the field of non-contact temperature measurement technology, specifically relating to a temperature measuring device. Background Art

[0002] Furnaces used in metal smelting, such as heating furnaces, annealing furnaces, and homogenizing furnaces, require temperature measurement of moving metal ingots and coils within the furnace, with a measurement error requirement of less than or equal to ±3℃. Traditional contact measurement methods, which involve embedding thermocouples in holes drilled in the surface of the object being measured, provide sufficient accuracy. However, in practice, because the target object is moving, this method is only used during the initial production run. Subsequent production processes do not perform temperature measurements using embedded thermocouples; instead, the furnace gas temperature is used to estimate the temperature of the target object, which cannot meet the requirements of continuous production.

[0003] Existing technologies also employ non-contact detection methods, using external furnace thermometers to measure the temperature of objects inside the furnace. However, existing thermometers are susceptible to several issues. First, they are easily affected by background temperature and the environment, often resulting in significant discrepancies between the measured and actual temperatures. Second, during use, high ambient temperatures can cause the measurement path to be exposed to high temperatures for extended periods, affecting measurement accuracy. Furthermore, if the object being measured is very hot, it will generate strong thermal radiation, significantly impacting the thermometer's results and potentially damaging the instrument. Utility Model Content

[0004] The purpose of this invention is to provide a temperature measuring device to solve the technical problem that existing temperature measuring devices are easily affected by ambient temperature, resulting in inaccurate temperature measurement results.

[0005] To solve the above-mentioned technical problems, this utility model provides a temperature measuring device, comprising:

[0006] The measuring tube is installed on the furnace wall, with one end being the radiation incident end that extends into the furnace and the other end being the radiation exit end located outside the furnace.

[0007] A light shield is installed at the radiation incident end;

[0008] The thermometer, installed at the radiation output end of the measuring tube, is used to receive infrared radiation emitted from that end; among which...

[0009] An air-cooling channel is provided inside the measuring tube and the light shield to cool the measuring tube and the light shield by air.

[0010] The outer wall of the measuring tube is wrapped with a first heat insulation layer.

[0011] In one embodiment of this application, the air inlet and outlet of the air-cooled channel are both located at the radiation outlet end of the measuring tube.

[0012] In one embodiment of this application, a first air passage and a second air passage are arranged side by side inside the wall of the measuring tube; wherein, an air inlet is provided at the air inlet end of the first air passage, and an air outlet is provided at the air outlet end of the second air passage, and both the air inlet and the air outlet are located at the radiation exit end of the measuring tube.

[0013] The light shield is provided with a third air channel, which is used to connect the air outlet of the first air channel and the air inlet of the second air channel.

[0014] In one embodiment of this application, the wall of the measuring tube includes: an inner tube and an outer tube sleeved on the outside of the inner tube, and an airflow space is formed between the inner tube and the outer tube;

[0015] The airflow space is provided with two partition plates that extend along the axial direction of the inner tube, dividing the airflow space into the first air passage and the second air passage.

[0016] In one embodiment of this application, the outer wall of the measuring tube is wrapped with a first heat insulation layer;

[0017] A protective shell is provided on the outer periphery of the first heat insulation layer.

[0018] In one embodiment of this application, the light shield includes:

[0019] The enclosure, fixed to the radiation incident end; and

[0020] The enclosure contains a light-transmitting sheet, a second heat insulation layer, a circular plate, and a third heat insulation layer arranged along the radiation incident direction; the third air passage is provided inside the circular plate.

[0021] In one embodiment of this application, a mounting ring is provided at the left end of the cover for fixing it inside the furnace.

[0022] In one embodiment of this application, the radiation exit end of the measuring tube is fixed outside the furnace by a flange assembly;

[0023] The flange assembly includes a pre-embedded flange, a first flange, and a second flange arranged sequentially; wherein

[0024] The pre-embedded flange is fixed to the furnace body, and several studs are fixed on it;

[0025] The first flange is fitted onto the stud and is fixedly connected to the pre-embedded flange by a number of first nuts;

[0026] The second flange is fitted onto the stud and is fixedly connected to the first flange by a plurality of second nuts; wherein

[0027] The second flange has a protruding tube at the incident end for inserting into the radiation exit end of the measuring tube.

[0028] In one embodiment of this application, the thermometer is fixed to the second flange by a plurality of connecting rods;

[0029] The temperature measuring instrument includes:

[0030] The housing has an injection tube at its end facing the second flange;

[0031] An infrared detection sensor, fixed inside a housing, is used to detect infrared radiation incident through an incident tube; and

[0032] The processing module is electrically connected to the infrared detection sensor.

[0033] In one embodiment of this application, a cooling plate is further provided on the outer wall of the housing;

[0034] The cooling plate is equipped with a cooling channel.

[0035] The beneficial effects of this utility model are:

[0036] (1) The measuring tube of the temperature measuring device cools the measuring path from two angles: ventilation and heat source isolation, in order to ensure long-term stable operation;

[0037] (2) A light shield is provided at the tail of the measuring tube, which can block most of the heat radiation from the non-measured part, reduce unnecessary interference radiation from entering the measuring path and being falsely detected by the temperature measuring instrument, and also reduce the cooling pressure of the measuring tube, improve the cooling effect and further ensure the accuracy of the measurement.

[0038] (3) The measuring tube is an integral structure, making disassembly and assembly more convenient and flexible.

[0039] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.

[0040] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0041] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0042] Figure 1 This is a perspective view of the temperature measuring device of this utility model;

[0043] Figure 2 This is a cross-sectional view of the temperature measuring device of this utility model;

[0044] Figure 3 This is a schematic diagram of the air-cooling channel of this utility model;

[0045] Figure 4 This is a cross-sectional view of the measuring tube and light shield of this utility model;

[0046] Figure 5 This is a partial cross-sectional view of the measuring tube of this utility model;

[0047] Figure 6 This is a cross-sectional view of the measuring tube of this utility model;

[0048] Figure 7 This is a sectional view of the flange assembly of this utility model;

[0049] Figure 8 This is a perspective view of the flange assembly of this utility model;

[0050] Figure 9 This is a schematic diagram of the cooling plate of this utility model.

[0051] In the picture:

[0052] Measuring tube 1, first air passage 11, second air passage 12, inner tube 101, outer tube 102, partition plate 103, first heat insulation layer 104, protective shell 105;

[0053] 2. Light shield, 21. Third air duct, 22. Cover, 221. Mounting ring, 23. Light-transmitting sheet, 24. Second heat insulation layer, 25. Third heat insulation layer, 26. Circular plate;

[0054] Thermometer 3, housing 31, infrared detection sensor 32, processing module 33, cooling plate 34, cooling channel 35;

[0055] Air-cooled aisle 4, air inlet 41, air outlet 42;

[0056] Flange assembly 5, embedded flange 51, stud 511, first flange 52, first nut 521, second flange 53, second nut 531, raised tube 532. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0058] See Figure 1 , Figure 2 and Figure 3 In one embodiment of this application, the temperature measuring device includes:

[0059] Measuring tube 1 is installed on the furnace wall, with one end being the radiation incident end extending into the furnace and the other end being the radiation exit end located outside the furnace; the internal channel of measuring tube 1 is the measuring path, and the infrared radiation of the object to be measured inside the furnace enters the measuring tube 1 from the radiation incident end and exits from the radiation exit end.

[0060] The light shield 2 is installed at the radiation incident end, i.e., inside the furnace. The light shield 2 can block most of the thermal radiation from non-measured parts, reduce unwanted interference radiation from entering the measurement path and being falsely detected by the temperature measuring instrument, and also reduce the cooling pressure of the measuring tube, improve the cooling effect and further ensure the accuracy of the measurement.

[0061] Thermometer 3 is installed at the radiation output end of measuring tube 1 to receive infrared radiation emitted from the radiation output end; wherein

[0062] An air-cooling channel 4 is provided inside the measuring tube 1 and the light shield 2, which is used to cool the measuring tube 1 and the light shield 2 by means of air.

[0063] The outer wall of the measuring tube 1 is wrapped with a first heat insulation layer 104; the first heat insulation layer 104 can block heat transfer between the furnace wall and the measuring tube 1.

[0064] For details, see Figure 2 and Figure 3 The air inlet 41 and air outlet 42 of the air-cooled channel 4 are both located at the radiation outlet end of the measuring tube 1; this facilitates connection to the air path.

[0065] As a preferred embodiment of the air-cooled aisle 4, see [link to previous document]. Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6The measuring tube 1 has a first air passage 11 and a second air passage 12 arranged side by side inside its tube wall; wherein, the first air passage 11 has an air inlet 41 at its inlet end and the second air passage 12 has an air outlet 42 at its outlet end, and both the air inlet 41 and the air outlet 42 are located at the radiation emission end of the measuring tube 1; the light shield 2 has a third air passage 21 inside it, which is used to connect the outlet end of the first air passage 11 and the inlet end of the second air passage 12.

[0066] For details, see Figure 3 Cold air enters the right end of the first air passage 11 through the air inlet 41, flows to the left end of the first air passage 11 and enters the third air passage 21 to cool the light shield 2, then enters the left end of the second air passage 12 through the third air passage 21, and finally exits from the right end of the second air passage 12 through the air outlet 42; the layout of this air-cooling channel 4 can effectively cool the entire measuring tube 1 and the light shield 2.

[0067] In this embodiment, see Figure 4 , Figure 5 and Figure 6 Preferably, the wall of the measuring tube 1 includes an inner tube 101 and an outer tube 102 sleeved on the outside of the inner tube 101. An airflow space is formed between the inner tube 101 and the outer tube 102. Two partition plates 103 extending along the axial direction of the inner tube 101 are provided at intervals in the airflow space, dividing the airflow space into a first air passage 11 and a second air passage 12.

[0068] In this embodiment, preferably, the two partition plates 103 can evenly divide the airflow space, resulting in uniform cooling.

[0069] In this embodiment, preferably, the first heat insulation layer 104 may be, but is not limited to, aluminum silicate cotton; to prevent the first heat insulation layer 104 from leaking, a protective shell 105 is provided on the outer periphery of the first heat insulation layer 104, which may be, but is not limited to, wrapped and fixed with a metal outer tube.

[0070] See Figure 4 Optionally, the light shield 2 includes: a housing 22 fixed to the radiation incident end; and a light-transmitting sheet 23, a second heat insulation layer 24, a circular plate 26 and a third heat insulation layer 25 located inside the housing 22 and arranged along the radiation incident direction; the third air passage 21 is provided inside the circular plate 26.

[0071] In this embodiment, the light-transmitting sheet 23 can be made of a transparent material, such as glass; the light-transmitting sheet 23 can seal the measurement passage inside the measuring tube 1 to prevent hot air from entering the measuring tube 1; the second heat insulation layer 24 and the third heat insulation layer 25 can isolate the heat transfer on both sides of the annular plate 26 and improve its cooling effect.

[0072] See Figure 1 and Figure 4 Optionally, the left end of the cover 22 is provided with a mounting ring 221 for fixing it inside the furnace.

[0073] See Figure 7 and Figure 8 The radiating end of the measuring tube 1 is fixed outside the furnace by a flange assembly 5. The flange assembly 5 includes a pre-embedded flange 51, a first flange 52, and a second flange 53 arranged sequentially. The pre-embedded flange 51 is fixed to the furnace body and has several studs 511 fixed on it. The first flange 52 is sleeved on the studs 511 and is fixedly connected to the pre-embedded flange 51 by several first nuts 521. The second flange 53 is sleeved on the studs 511 and is fixedly connected to the first flange 52 by several second nuts 531. The incident end of the second flange 53 is provided with a protruding tube 532 for inserting into the radiating end of the measuring tube 1.

[0074] In this embodiment, optionally, a sealing ring can be provided between the pre-embedded flange 51 and the first flange 52; after the light shield 2 is fixed in the furnace, the protruding tube 532 is inserted into the radiation emission end of the measuring tube 1 to fix the radiation emission end of the measuring tube 1.

[0075] See Figure 7 and Figure 8 The thermometer 3 is fixed to the second flange 53 by several connecting rods 54; the thermometer 3 includes: a housing 31, the end of which facing the second flange 53 is provided with an incident tube 311; an infrared detection sensor 32, fixed inside the housing 31, for detecting infrared radiation incident through the incident tube 311; and a processing module 33, electrically connected to the infrared detection sensor 32.

[0076] In this embodiment, the infrared radiation of the object under test is emitted from the radiation output end of the measuring tube 1 and is sensed by the infrared detection sensor 32 through the incident tube 311. The processing module 33 can be used to process the data acquired by the infrared detection sensor 32 to obtain the detection result.

[0077] It should be noted that this application aims to improve the structure, but does not improve the relevant testing procedures. Those skilled in the art can obtain the test results using existing procedures.

[0078] In this embodiment, the temperature measuring instrument 3 has a high degree of integration and can acquire results in situ.

[0079] Preferably, a cooling plate 34 is also provided on the outer wall of the housing 31; a cooling channel 35 is provided inside the cooling plate 34; the cooling channel 35 can be used to circulate a cooling medium, such as cold air, to cool the housing 31.

[0080] In summary, the temperature measuring device of this invention can detect the actual temperature of the target object more accurately and to a greater extent, reduce the influence of background radiation on the temperature measurement process, and greatly improve the measurement accuracy.

[0081] The measuring tube of the temperature measuring device cools the measuring path from two angles: ventilation and heat source isolation, to ensure long-term stable operation. The air-cooling channel uses compressed air with pressurized flow to remove some of the heat from the measuring path, achieving the purpose of cooling. At the same time, the aluminum silicate cotton wrapping layer wraps around the compressed air cooling layer, which can ensure the cooling effect of the compressed air cooling layer and also isolate some external heat radiation, thus playing a role in cooling.

[0082] The measuring tube is equipped with a light shield at the tail end, which can block most of the heat radiation from parts other than the measured part, reduce unwanted interference radiation from entering the measuring path and being falsely detected by the temperature measuring instrument, and also reduce the cooling pressure of the measuring tube, improve the cooling effect and further ensure the accuracy of the measurement.

[0083] The measuring tube is a single, integrated structure, making disassembly and assembly more convenient and flexible.

[0084] All the devices (parts whose specific structures are not specified) selected in this application are general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0085] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly, for example, they can be fixed connections, detachable connections, or integral connections.

[0086] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0087] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A temperature measuring device, characterized in that: include: A measuring tube (1) is inserted through the furnace wall, one end of which is a radiation incident end extending into the furnace, and the other end of which is a radiation exit end located outside the furnace; A light shield (2) installed at the radiation incident end; A thermometer (3) is installed at the radiation output end of the measuring tube (1) and is used to receive infrared radiation emitted from the radiation output end; in An air cooling channel (4) is provided in the measuring tube (1) and the light shield (2) for cooling the measuring tube (1) and the light shield (2) through air; The outer wall of the measuring tube (1) is wrapped with a first heat insulation layer (104).

2. The temperature measuring device according to claim 1, characterized in that: The air inlet (41) and the air outlet (42) of the air cooling channel (4) are both arranged at the radiation emission end of the measuring tube (1).

3. The temperature measuring device according to claim 2, characterized in that: A first air channel (11) and a second air channel (12) are arranged in parallel in the tube wall of the measuring tube (1); wherein an air inlet (41) is arranged on the air inlet end of the first air channel (11), and an air outlet (42) is arranged on the air outlet end of the second air channel (12); and the air inlet (41) and the air outlet (42) are both arranged at the radiation outlet end of the measuring tube (1); A third air channel (21) is provided in the light shield (2) and is used to connect the air outlet end of the first air channel (11) and the air inlet end of the second air channel (12).

4. The temperature measuring device according to claim 3, characterized in that: The tube wall of the measuring tube (1) comprises: an inner tube (101) and an outer tube (102) sleeved on the outer side of the inner tube (101), and an airflow space is formed between the inner tube (101) and the outer tube (102); Two partition plates (103) extending in the axial direction of the inner tube (101) are arranged in the airflow space to divide the airflow space into the first air channel (11) and the second air channel (12).

5. The temperature measuring device according to claim 1, characterized in that: A protective shell (105) is provided on the outer periphery of the first heat insulation layer (104).

6. The temperature measuring device according to claim 3, characterized in that: The light shield (2) comprises: A cover (22) fixed to the radiation incident end; and A light-transmitting sheet (23), a second heat-insulating layer (24), a circular plate (26) and a third heat-insulating layer (25) are located in the housing (22) and arranged along the radiation incident direction; the third air duct (21) is arranged in the circular plate (26).

7. The temperature measuring device according to claim 6, characterized in that: The left end of the cover shell (22) is provided with a mounting ring (221) for fixing in the furnace.

8. The temperature measuring device according to claim 1, characterized in that: The radiation output end of the measuring tube (1) is fixed outside the furnace via a flange assembly (5); The flange assembly (5) comprises a pre-buried flange (51), a first flange (52) and a second flange (53) which are arranged in sequence; wherein The embedded flange (51) is fixed on the furnace body, and a plurality of studs (511) are fixed thereon; The first flange (52) is sleeved on the stud (511) and fixedly connected to the embedded flange (51) via a plurality of first nuts (521); The second flange (53) is sleeved on the stud (511) and fixedly connected to the first flange (52) via a plurality of second nuts (531); The incident end of the second flange (53) is provided with a protruding tube (532) for inserting into the radiation exit end of the measuring tube (1).

9. The temperature measuring device according to claim 8, characterized in that: The temperature measuring instrument (3) is fixed on the second flange (53) via a plurality of connecting rods (54); The temperature measuring instrument (3) comprises: A shell (31), wherein an incident tube (311) is disposed at an end of the shell (31) facing the second flange (53); An infrared detection sensor (32) is fixed in the housing (31) and is used to detect infrared radiation incident through the incident tube (311); and The processing module (33) is electrically connected to the infrared detection sensor (32).

10. The temperature measuring device according to claim 9, characterized in that: A refrigeration plate (34) is also provided on the outer wall of the shell (31); A refrigeration channel (35) is provided in the refrigeration plate (34).

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