技术领域Technical Field
本发明涉及一种热电偶检定装置，特别是涉及一种双针式热电偶检定用恒温温场采集装置。The invention relates to a thermocouple calibration device, in particular to a constant temperature field acquisition device for double-needle thermocouple calibration.
背景技术Background Art
在铝深加工单位，在对热轧卷、冷轧卷等成品进行温度工艺控制时，需要采用一种双针式热电偶进行接触测温，在对该热电偶进行实验室检定时，因该热电偶正负极采用开路设计，接触测温时需要人工对热电偶测量端的两个端子进行施压，使两个端子所附带的弹簧产生形变，从而实现充分接触，达到测量温度的目的，实验室一般的做法将其直接放入油槽，但这样做容易造成热电偶内部进油，烧坏或短路内部导线，污染热电偶内部结构，故无法实现恒温温场的采集，无法实现检定工作。In aluminum deep processing units, when performing temperature process control on finished products such as hot-rolled coils and cold-rolled coils, a double-needle thermocouple is required for contact temperature measurement. When the thermocouple is calibrated in the laboratory, because the positive and negative poles of the thermocouple are open-circuit designed, it is necessary to manually apply pressure to the two terminals of the thermocouple measuring end during contact temperature measurement to deform the springs attached to the two terminals, thereby achieving full contact and achieving the purpose of measuring temperature. The general practice in the laboratory is to put it directly into the oil tank, but this can easily cause oil to enter the thermocouple, burn or short-circuit the internal wires, and pollute the internal structure of the thermocouple, so it is impossible to collect the constant temperature field and perform calibration work.
发明内容Summary of the invention
本发明所要解决的技术问题是：克服现有技术的不足，提供一种能够精准测量恒温温场的温度，并且杜绝油品进入双针式热电偶内部，实现无损检定的双针式热电偶检定用恒温温场采集装置。The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a constant temperature field acquisition device for double-needle thermocouple calibration that can accurately measure the temperature of a constant temperature field and prevent oil from entering the interior of a double-needle thermocouple to achieve non-destructive testing.
本发明为解决技术问题所采取的技术方案是：The technical solution adopted by the present invention to solve the technical problem is:
一种双针式热电偶检定用恒温温场采集装置，包括固定板和采集管，所述固定板包括上固定板和下固定板，所述上固定板与所述下固定板之间通过螺杆连接，所述上固定板上设置有中心孔，所述下固定板上与所述中心孔对应处设置有铝板，所述中心孔与所述铝板之间设置有用于放置双针式热电偶的所述采集管，所述上固定板和所述下固定板上均均布有用于放置标准热电偶和温控热电偶的插孔。A constant temperature field collection device for double-needle thermocouple calibration comprises a fixed plate and a collection tube, wherein the fixed plate comprises an upper fixed plate and a lower fixed plate, wherein the upper fixed plate and the lower fixed plate are connected via a screw, wherein a center hole is arranged on the upper fixed plate, wherein an aluminum plate is arranged at a position corresponding to the center hole on the lower fixed plate, wherein the collection tube for placing the double-needle thermocouple is arranged between the center hole and the aluminum plate, and wherein jacks for placing standard thermocouples and temperature-controlled thermocouples are evenly distributed on the upper fixed plate and the lower fixed plate.
所述采集管为上下贯通的空心圆柱形采集管，所述中心孔的直径与所述采集管的外径相匹配，且所述中心孔的内壁与所述采集管的外壁之间为滑动连接，所述采集管的上端面与所述上固定板的上端面相持平，或者超出所述上固定板的上端面；所述采集管与所述上固定板的上端面连接处设置有第一密封圈。The collection tube is a hollow cylindrical collection tube that passes through from top to bottom. The diameter of the center hole matches the outer diameter of the collection tube, and the inner wall of the center hole and the outer wall of the collection tube are slidably connected. The upper end surface of the collection tube is flush with the upper end surface of the upper fixed plate, or exceeds the upper end surface of the upper fixed plate. A first sealing ring is provided at the connection between the collection tube and the upper end surface of the upper fixed plate.
所述铝板的直径大于所述采集管的外径，所述采集管的下端面与所述铝板的上端面连接，且所述采集管与所述铝板连接处设置有第二密封圈。The diameter of the aluminum plate is larger than the outer diameter of the collection tube, the lower end surface of the collection tube is connected to the upper end surface of the aluminum plate, and a second sealing ring is provided at the connection between the collection tube and the aluminum plate.
所述采集管为由石英玻璃制成的透明采集管。The collecting tube is a transparent collecting tube made of quartz glass.
所述上固定板上的所述插孔均布在所述中心孔圆周，所述下固定板上的插孔均布在所述铝板的圆周，所述上固定板上的所述插孔与所述下固定板上的所述插孔上下对称设置。The insertion holes on the upper fixing plate are evenly distributed on the circumference of the central hole, and the insertion holes on the lower fixing plate are evenly distributed on the circumference of the aluminum plate. The insertion holes on the upper fixing plate and the insertion holes on the lower fixing plate are symmetrically arranged up and down.
所述螺杆的上端穿出所述上固定板的上端面，且在所述上固定板的上端面和下端面上利用两个螺母进行固定；所述螺杆的下端穿出所述下固定板的下端面，且在所述下固定板的上端面和下端面上利用另外两个螺母进行固定。The upper end of the screw rod passes through the upper end surface of the upper fixing plate, and is fixed on the upper and lower end surfaces of the upper fixing plate by using two nuts; the lower end of the screw rod passes through the lower end surface of the lower fixing plate, and is fixed on the upper and lower end surfaces of the lower fixing plate by using another two nuts.
所述螺杆设置有三个，均布在所述上固定板与所述下固定板之间。The number of screw rods is three and they are evenly distributed between the upper fixing plate and the lower fixing plate.
所述上固定板的上端面上还设置方便手持的手提柄。A carrying handle for easy holding is also arranged on the upper end surface of the upper fixing plate.
所述铝板的厚度为0.5-1mm。The thickness of the aluminum plate is 0.5-1 mm.
所述石英玻璃管内径为30-50mm，管壁厚度为1-2mm，上下端口处为水平剖面，可实现更好的密封功能。The inner diameter of the quartz glass tube is 30-50 mm, the tube wall thickness is 1-2 mm, and the upper and lower ports are horizontal sections, which can achieve better sealing function.
所述上固定板与所述下固定板均采用不锈钢制作。The upper fixing plate and the lower fixing plate are both made of stainless steel.
本发明的积极有益效果是：The positive beneficial effects of the present invention are:
1、本装置中采集管为透明耐高温的石英玻璃管，且采集管的下端面与铝板之间以及采集管与上固定板的上端面之间设置有密封圈，形成封闭连接，能够起到隔离油槽内油品的作用，采集管的上端是开口式结构，双针式热电偶从开口端进入采集管内，起到阻油、绝缘、通道的作用，杜绝油品进入双针式热电偶内部，实现无损检定的目的。1. The collection tube in this device is a transparent, high-temperature resistant quartz glass tube, and a sealing ring is arranged between the lower end face of the collection tube and the aluminum plate, and between the collection tube and the upper end face of the upper fixed plate, forming a closed connection, which can isolate the oil in the oil tank. The upper end of the collection tube is an open structure, and the double-needle thermocouple enters the collection tube from the open end, which plays the role of oil blocking, insulation, and passage, preventing oil from entering the double-needle thermocouple and achieving the purpose of non-destructive testing.
2、本装置中在采集管内部，双针式热电偶上的两个针式端子均与采集管底部的铝板连接，实现双针式热电偶的开路变闭合，本装置又是直接置于油槽恒温温场中，闭合后的双针式热电偶，能够精准测量恒温温场的温度，通过与插孔内的标准热电偶上的检测温度相比较，对恒温温场的温度进行精准调控，能够达到测量前恒温温场6min内波动±0.6℃，采样前60秒温度波动小于±0.2℃，利于检定。2. In this device, inside the collection tube, the two pin terminals on the double-pin thermocouple are connected to the aluminum plate at the bottom of the collection tube to realize the open circuit of the double-pin thermocouple to close. This device is directly placed in the constant temperature field of the oil tank. The closed double-pin thermocouple can accurately measure the temperature of the constant temperature field. By comparing with the detected temperature on the standard thermocouple in the jack, the temperature of the constant temperature field can be accurately controlled, and the constant temperature field can fluctuate within ±0.6℃ within 6 minutes before measurement, and the temperature fluctuation is less than ±0.2℃ in 60 seconds before sampling, which is conducive to calibration.
3、本装置中螺杆上与上固定班和下固定板连接处均利用螺母进行固定，并且螺杆的上下两端分别穿透上固定班和下固定板，不同的采集管有可能高度不同，在采集管的高度不同时，能够根据采集管的高度利用螺杆和螺母调节上固定班和下固定板之间的距离，适用范围广。3. In this device, nuts are used to fix the connection between the screw and the upper fixed plate and the lower fixed plate, and the upper and lower ends of the screw penetrate the upper fixed plate and the lower fixed plate respectively. Different collection tubes may have different heights. When the heights of the collection tubes are different, the distance between the upper fixed plate and the lower fixed plate can be adjusted according to the height of the collection tubes by using the screw and the nut, and the application range is wide.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1是本发明一种双针式热电偶检定用恒温温场采集装置的结构示意图。FIG1 is a schematic structural diagram of a constant temperature field acquisition device for double-needle thermocouple calibration according to the present invention.
具体实施方式DETAILED DESCRIPTION
下面结合附图和具体实施例对本发明作进一步的解释和说明：The present invention will be further explained and illustrated below in conjunction with the accompanying drawings and specific embodiments:
参见图1：图中，1-上固定板，2-下固定板，3-螺杆，4-螺母，5-中心孔，6-铝板，7-采集管，8-第一密封圈，9-插孔，10-手提柄，11-第二密封圈。See Figure 1: In the figure, 1-upper fixing plate, 2-lower fixing plate, 3-screw, 4-nut, 5-center hole, 6-aluminum plate, 7-collection tube, 8-first sealing ring, 9-jack, 10-carrying handle, 11-second sealing ring.
实施例：结合JJF1637-2017《廉金属热电偶校准规范》国家检定规程要求，采用模拟生产现场环境法，制作双针式热电偶检定用恒温温场采集装置，本装置专门为配合实验室采用甲基硅油恒温槽校验双针式热电偶方法设计的一种可放入恒温油槽的装置，采用此装置后可实现在恒温稳操内部实现双针式热电偶的开路变闭合，精准测量恒温温场的温度，并且杜绝油品进入双双针式热电偶内部，实现无损检定的目的。Embodiment: In combination with the national verification regulations of JJF1637-2017 "Calibration Specifications for Low-cost Metal Thermocouples", a constant temperature field acquisition device for double-needle thermocouple verification is produced by simulating the production site environment method. This device is specially designed to cooperate with the laboratory to use a methyl silicone oil constant temperature bath to calibrate double-needle thermocouples. It is a device that can be placed in a constant temperature oil tank. After using this device, the open circuit of the double-needle thermocouple can be changed to closed inside the constant temperature stabilizer, the temperature of the constant temperature field can be accurately measured, and oil products can be prevented from entering the double-needle thermocouple, thereby achieving the purpose of non-destructive verification.
具体的结构包括固定板和采集管7，固定板包括上固定板1和下固定板2，上固定板1与下固定板2之间通过三个螺杆3连接，三个螺杆3均布在上固定板1与下固定板2之间，螺杆3的上端穿出上固定板1的上端面，且在上固定板1的上端面和下端面上各利用一个螺母4进行固定；螺杆3的下端穿出下固定板2的下端面，且在下固定板2的上端面和下端面上各利用另外的螺母4进行固定，此处利用螺杆3连接上固定板1和下固定板2，是因为螺杆3和螺母4之间是可移动的，螺杆3又是穿透上固定班和下固定板2，不同的采集管7有可能高度不同，在采集管7的高度不同时，能够根据采集管7的高度利用螺杆3和螺母4调节上固定班和下固定板2之间的距离，适用范围广。The specific structure includes a fixing plate and a collecting tube 7, the fixing plate includes an upper fixing plate 1 and a lower fixing plate 2, the upper fixing plate 1 and the lower fixing plate 2 are connected by three screws 3, the three screws 3 are evenly distributed between the upper fixing plate 1 and the lower fixing plate 2, the upper end of the screw 3 passes through the upper end surface of the upper fixing plate 1, and a nut 4 is used to fix the upper end surface and the lower end surface of the upper fixing plate 1; the lower end of the screw 3 passes through the lower end surface of the lower fixing plate 2, and another nut 4 is used to fix the upper end surface and the lower end surface of the lower fixing plate 2. The screw 3 is used to connect the upper fixing plate 1 and the lower fixing plate 2 here because the screw 3 and the nut 4 are movable, and the screw 3 penetrates the upper fixing plate and the lower fixing plate 2. Different collecting tubes 7 may have different heights. When the heights of the collecting tubes 7 are different, the distance between the upper fixing plate and the lower fixing plate 2 can be adjusted according to the height of the collecting tubes 7 by using the screw 3 and the nut 4, and the application range is wide.
上固定板1上的中心线处设置有中心孔5，下固定板2上与中心孔5对应处设置有铝板6，中心孔5与铝板6之间设置有用于放置双针式热电偶的采集管7，上固定板1和下固定板2上均均布有用于放置标准热电偶和温控热电偶的插孔9，上固定板1上的插孔9均布在中心孔5圆周，下固定板2上的插孔9均布在铝板6的圆周，上固定板1上的插孔9与下固定板2上的插孔9上下对称设置。A center hole 5 is provided at the center line of the upper fixed plate 1, an aluminum plate 6 is provided on the lower fixed plate 2 at a position corresponding to the center hole 5, a collection tube 7 for placing a double-needle thermocouple is provided between the center hole 5 and the aluminum plate 6, and sockets 9 for placing standard thermocouples and temperature-controlled thermocouples are evenly distributed on the upper fixed plate 1 and the lower fixed plate 2. The sockets 9 on the upper fixed plate 1 are evenly distributed on the circumference of the center hole 5, and the sockets 9 on the lower fixed plate 2 are evenly distributed on the circumference of the aluminum plate 6. The sockets 9 on the upper fixed plate 1 and the sockets 9 on the lower fixed plate 2 are symmetrically arranged up and down.
采集管7为上下贯通的空心圆柱形采集管7，中心孔5的直径与采集管7的外径相匹配，且中心孔5的内壁与采集管7的外壁之间为滑动连接，采集管7的上端面与上固定板1的上端面相持平，或者超出上固定板1的上端面，采集管7的上端口不封闭，为开口式结构，采集管7为由石英玻璃制成的透明采集管7，双针式热电偶从采集管7的开口端进入采集管7内，起到阻油、绝缘、通道的作用。The collecting tube 7 is a hollow cylindrical collecting tube 7 that passes through from top to bottom. The diameter of the center hole 5 matches the outer diameter of the collecting tube 7, and the inner wall of the center hole 5 is slidably connected to the outer wall of the collecting tube 7. The upper end surface of the collecting tube 7 is flush with the upper end surface of the upper fixed plate 1, or exceeds the upper end surface of the upper fixed plate 1. The upper end of the collecting tube 7 is not closed and is an open structure. The collecting tube 7 is a transparent collecting tube 7 made of quartz glass. The double-needle thermocouple enters the collecting tube 7 from the open end of the collecting tube 7 to play the role of oil blocking, insulation, and passage.
铝板6的直径大于采集管7的外径，采集管7的下端面与铝板6的上端面连接，且采集管7与与上固定板1的上端面连接处设置有第一密封圈8，与铝板6连接处设置有第二密封圈11，形成封闭连接，能够起到隔离油槽内油品的作用，铝板6的厚度为0.5-1mm。The diameter of the aluminum plate 6 is larger than the outer diameter of the collection tube 7. The lower end face of the collection tube 7 is connected to the upper end face of the aluminum plate 6. A first sealing ring 8 is provided at the connection between the collection tube 7 and the upper end face of the upper fixed plate 1, and a second sealing ring 11 is provided at the connection with the aluminum plate 6, forming a closed connection, which can isolate the oil in the oil tank. The thickness of the aluminum plate 6 is 0.5-1mm.
上固定板1的上端面上还设置方便手持的手提柄10，且上固定板1和下固定板2均采用不锈钢制作。A carrying handle 10 for convenient hand-holding is also provided on the upper end surface of the upper fixing plate 1, and both the upper fixing plate 1 and the lower fixing plate 2 are made of stainless steel.
操作的时候，手持手提柄10将本装置直接置于油槽恒温温场中，带有铝板6的那一端位于底部，在插孔9内插上标准热电偶和温控热电偶，在采集管7内放入双针式热电偶，并将双针式热电偶的双极均与铝板6接触，将标准热电偶和温控热电偶以及双针式热电偶均连接到热电偶检定系统进行温度精控，调控后，能够达到测量前恒温温场6min内波动±0.6℃，采样前60s内温度波动小于±0.2℃，实现检定。During operation, hold the carrying handle 10 to place the device directly in the constant temperature field of the oil tank, with the end with the aluminum plate 6 at the bottom, insert the standard thermocouple and the temperature-controlled thermocouple into the jack 9, put the double-needle thermocouple into the collection tube 7, and make the bipolar of the double-needle thermocouple contact with the aluminum plate 6, connect the standard thermocouple, the temperature-controlled thermocouple and the double-needle thermocouple to the thermocouple calibration system for precise temperature control. After regulation, the constant temperature field before measurement can fluctuate by ±0.6°C within 6 minutes, and the temperature fluctuation within 60 seconds before sampling can be less than ±0.2°C, thereby achieving calibration.
经采用本装置后，可实现对规格大小为φ（15-25）mm、L=（200-500）mm，K型分度、双极分离的双针式热电偶在油槽内的检定，起到精准采集恒温温场、固定热电偶进入恒温温场的通道，有效起到帮助检定工作能够顺利完成，禁止油品侵入、有效绝缘、杜绝外围干扰因素等，可实现有效检定工作，对于铝深加工企业计量实验室对于双针式热电偶校验将起到关键的作用。After adopting this device, it is possible to realize the calibration of double-needle thermocouples with specifications of φ (15-25) mm, L = (200-500) mm, K-type division, and bipolar separation in the oil tank, which plays a role in accurately collecting the constant temperature field and fixing the thermocouple to enter the constant temperature field. It effectively helps the calibration work to be completed smoothly, prohibits oil intrusion, effectively insulates, and eliminates external interference factors, etc., and can realize effective calibration work. It will play a key role in the calibration of double-needle thermocouples in the metrology laboratory of aluminum deep processing enterprises.
当然，本发明创造并不局限于上述实施方式，熟悉本领域的技术人员在不违背本发明精神的前提下还可作出等同变形或替换，这些等同的变型或替换均包含在本申请权利要求所限定的范围内。Of course, the invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111109018.1ACN113834579B (en) | 2021-09-22 | 2021-09-22 | A constant temperature field acquisition device for double-needle thermocouple calibration |
| Application Number | Priority Date | Filing Date | Title |
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| CN202111109018.1ACN113834579B (en) | 2021-09-22 | 2021-09-22 | A constant temperature field acquisition device for double-needle thermocouple calibration |
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| CN113834579A CN113834579A (en) | 2021-12-24 |
| CN113834579Btrue CN113834579B (en) | 2024-10-22 |
| Application Number | Title | Priority Date | Filing Date |
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| CN202111109018.1AActiveCN113834579B (en) | 2021-09-22 | 2021-09-22 | A constant temperature field acquisition device for double-needle thermocouple calibration |
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