阅读说明：本技术 一种用于片状薄膜热电偶传感器标定的多功能夹持装置 (Multifunctional clamping device for calibration of sheet-shaped thin-film thermocouple sensor ) 是由 崔云先 高富来 殷俊伟 杜鹏 黄金鹏 于 2019-11-15 设计创作，主要内容包括：本发明提供一种用于片状薄膜热电偶传感器标定的多功能夹持装置,包括：夹具本体,夹具本体由内圆锥形套筒和外圆锥形半圆套筒扣合而成,内圆锥形套筒和外圆锥形半圆套筒之间设有传感器卡槽,传感器卡槽右侧设置有刻度标尺；内圆锥形套筒前端开设有螺纹孔,利用长紧定螺钉将待测片状薄膜热电偶传感器压紧。内圆锥形套筒内设置有与之相配合的引线夹具工装,采用机械夹紧法,采用短紧定螺钉将热电偶正极补偿导线和热电偶负极补偿导线分别压紧于对应的薄膜热电极处。本发明装置解决了高温环境下片状薄膜热电偶引线端易断路的问题,可安装于立式、卧式等多种干式计量炉炉口处,减少了标定过程中炉膛热量的散失,提高了实验结果的准确性。(The invention provides a multifunctional clamping device for calibrating a sheet-shaped film thermocouple sensor, which comprises: the clamp comprises a clamp body, wherein the clamp body is formed by buckling an inner conical sleeve and an outer conical semicircular sleeve, a sensor clamping groove is formed between the inner conical sleeve and the outer conical semicircular sleeve, and a scale ruler is arranged on the right side of the sensor clamping groove; the front end of the inner conical sleeve is provided with a threaded hole, and the long set screw is used for compressing the sheet-shaped film thermocouple sensor to be measured. And a lead clamp tool matched with the inner conical sleeve is arranged in the inner conical sleeve, and the thermocouple positive compensation lead and the thermocouple negative compensation lead are respectively pressed at the corresponding thin film thermoelectric poles by adopting a mechanical clamping method and a short set screw. The device solves the problem that the lead end of the sheet-shaped film thermocouple is easy to open circuit in a high-temperature environment, can be arranged at the fire hole of various dry metering furnaces such as a vertical furnace, a horizontal furnace and the like, reduces the heat loss of a hearth in the calibration process, and improves the accuracy of an experimental result.)

1. A multifunctional clamping device for calibration of a sheet-like thin-film thermocouple sensor is characterized by comprising: the clamp comprises a clamp body, wherein the clamp body is formed by buckling an inner conical sleeve (1) and an outer conical semicircular sleeve (3), and the outer diameter of the inner conical sleeve (1) is the same as the inner diameter of the outer conical semicircular sleeve (3);

a sensor clamping groove (1-2) is formed between the inner conical sleeve (1) and the outer conical semicircular sleeve (3) and used for placing a sheet thin-film thermocouple sensor (6) to be measured, and a graduated scale (1-1) is arranged on the right side of the sensor clamping groove (1-2); the front end of the inner conical sleeve (1) is provided with a threaded hole (1-4) and a long set screw (2) is used for tightly pressing a sheet-shaped film thermocouple sensor (6) to be measured.

And a lead clamp tool (4) matched with the inner conical sleeve is arranged in the inner conical sleeve (1), the lead clamp tool (4) adopts a mechanical clamping method, and a short set screw (5) is adopted to respectively press the thermocouple anode compensation lead (6-5) and the thermocouple cathode compensation lead (6-6) to the corresponding thin film thermode (6-2) and thin film thermode (6-3).

2. The multifunctional clamping device for calibrating the sheet-shaped thin-film thermocouple sensor according to claim 1, wherein the front end of the inner conical sleeve (1) is provided with two cylindrical pins (1-3), the front end of the outer conical semicircular sleeve (3) is provided with two cylindrical pin holes (3-1), and the cylindrical pins (1-3) can be inserted into the cylindrical pin holes (3-1) when the inner conical sleeve (1) and the outer conical semicircular sleeve (3) are matched.

3. The multifunctional clamping device for calibrating the laminar thin-film thermocouple sensor according to claim 1, wherein the tail of the inner conical sleeve (1) is provided with plate rib grooves (1-7), the tail of the lead clamp tool (4) is provided with square plate ribs (4-2), and when the lead clamp tool (4) is matched with the inner conical sleeve (1), the square plate ribs (4-2) can be inserted into the plate rib grooves (1-7).

4. The multifunctional clamping device for calibration of a laminar thin-film thermocouple sensor according to claim 1, wherein the inner conical sleeve (1), the long set screw (2), the outer conical semicircular sleeve (3), the lead clamp fixture (4) and the short set screw (5) are made of high temperature-resistant and heat-insulating zirconia ceramic materials.

5. The multifunctional holding device for calibration of a laminar thin-film thermocouple sensor according to claim 1, characterized in that the gaps of the sensor slots (1-2) are filled with high temperature resistant and heat insulating asbestos material.

Technical Field

The invention relates to the technical field of thermocouple detection, in particular to a multifunctional clamping device for calibrating a sheet-shaped film thermocouple sensor.

Background

The thermocouple sensor is one of the most widely used temperature sensing elements in the current temperature measurement, and is a temperature measuring instrument based on thermoelectric effect. It uses thermocouple as sensor to convert the measured temperature signal into potential signal, and uses display instrument to measure millivolt voltage signal to implement temperature measurement. The sheet-shaped thin-film thermocouple is small in structure, convenient to manufacture, low in price, wide in temperature measuring range, small in thermal inertia and high in accuracy, can be well attached to the surface of a measured object to perform real-time stable temperature measurement, and achieves centralized control and automatic test. The temperature of fluid, solid and surface can be measured by the device, so it can be widely used in industrial production, scientific research, air-conditioning and gas engineering.

Although each sensor has certain specifications and electrical parameters, it cannot be guaranteed that any two thermocouples are completely consistent, and the parameter change curve of the two thermocouples is not necessarily completely matched with the true temperature value. In order to ensure that the temperature can be accurately detected during use, the whole temperature measurement system needs to be calibrated (or called as calibration adjustment) by using standard temperature, so that the temperature displayed after the system is measured conforms to the true temperature value as much as possible, and the error of the temperature measurement system is reduced.

The sheet-shaped film thermocouple sensor is difficult to clamp in the calibration process due to the influence of the shape of the sheet-shaped film thermocouple sensor, and the sheet-shaped film thermocouple is small in size and cannot be introduced into a preset position of a calibration furnace, so that the experiment error is large; in addition, in order to stably output the temperature measurement signal to the instrument, the calibration measuring furnace is not in a fully closed state, so that serious heat loss is caused, and the temperature measurement experiment result is influenced. Generally, asbestos cloth or high-temperature-resistant materials are adopted to plug the furnace mouth, but when a plurality of calibration experiments are carried out, the plugging process is very complicated, and an ideal effect is difficult to achieve; after the thermocouple is calibrated for many times, the insulation between the thermocouple electrode and the furnace wall is poor due to excessive dirt or impurities on the insulating substrate and the wiring board, and the insulation is more serious at high temperature, so that not only can the loss of thermoelectric force be caused, but also interference can be introduced, and the error caused by the loss can sometimes reach hundreds of degrees; the sheet-shaped film thermocouple mostly adopts conductive colloid to bond the compensation lead and the hot electrode pin, but the degumming phenomenon is easy to occur under the high-temperature or vibration environment, thereby causing the open circuit failure of the thermocouple sensor. The above experimental measurement problems all cause great interference to the stability and accuracy of the calibration process.

Disclosure of Invention

In view of the above-mentioned technical problem, a multifunctional clamping device for calibration of a sheet-like thin-film thermocouple sensor is provided. The device has the advantages of convenient installation, simple structure, realization of separation of the cold end and the hot end of the thermocouple, stable clamping of the thermocouple lead wire and the like, and can solve various measurement problems of the sheet-shaped film thermocouple in the calibration process.

The technical means adopted by the invention are as follows:

a multi-functional clamping device for calibration of a sheet thin film thermocouple sensor, comprising: the clamp comprises a clamp body, wherein the clamp body is formed by buckling an inner conical sleeve and an outer conical semicircular sleeve, and the inner conical sleeve and the outer conical semicircular sleeve can be assembled according to tolerance size;

a sensor clamping groove is formed between the inner conical sleeve and the outer conical semicircular sleeve and used for placing a sheet-shaped thin-film thermocouple sensor to be detected, and a scale is arranged on the right side of the sensor clamping groove; the front end of the inner conical sleeve is provided with a threaded hole, and the long set screw is used for tightly pressing the sheet-shaped film thermocouple sensor to be measured.

And a lead clamp tool matched with the inner conical sleeve is arranged in the inner conical sleeve, the lead clamp tool adopts a mechanical clamping method, and a short set screw is adopted to respectively compress the thermocouple anode compensation lead and the thermocouple cathode compensation lead at the corresponding thin film thermoelectric position.

Furthermore, two cylindrical pins are arranged at the front end of the inner conical sleeve, two cylindrical pin holes are arranged at the front end of the outer conical semicircular sleeve, and the cylindrical pins can be inserted into the cylindrical pin holes when the inner conical sleeve and the outer conical semicircular sleeve are matched.

Furthermore, the tail part of the inner conical sleeve is provided with a plate rib groove, the tail part of the lead clamp tool is provided with a square plate rib, and the square plate rib can be inserted into the plate rib groove when the lead clamp tool is matched with the inner conical sleeve.

Furthermore, the inner conical sleeve, the long set screw, the outer conical semicircular sleeve, the lead clamp tool and the short set screw are all made of high-temperature-resistant and heat-insulating zirconia ceramic materials.

Furthermore, gaps of the sensor clamping groove are filled with high-temperature-resistant and heat-insulating asbestos materials.

Compared with the prior art, the invention has the following advantages:

1. the multifunctional clamping device for calibrating the sheet-shaped film thermocouple sensor solves the clamping problem of the sheet-shaped thermocouple during the calibration process, and the temperature measuring position of the sensor can be controlled by using the scale at the front end of the device, so that the experimental error caused by different temperature measuring points is reduced.

2. The multifunctional clamping device for calibrating the sheet-shaped film thermocouple sensor provided by the invention adopts the high-temperature-resistant zirconia thermal insulation material, so that the cold end and the hot end of the thermocouple sensor are effectively isolated, and the calibration result is more accurate and reliable.

3. The multifunctional clamping device for calibrating the sheet-shaped thin-film thermocouple sensor provided by the invention can seal the furnace mouth during calibration to play a role in heat preservation, solves the problem of complicated furnace plugging process during multiple calibration, and reduces experimental errors caused by heat loss.

4. The multifunctional clamping device for calibrating the sheet-shaped thin-film thermocouple sensor effectively protects the thermocouple sensor in the calibration process, avoids the phenomenon of poor insulation between a thermocouple electrode and a furnace wall caused by excessive dirt or impurities on an insulating substrate after multiple calibration experiments, reduces the loss of thermoelectric potential at high temperature, and reduces experimental errors caused by external environment interference.

5. According to the multifunctional clamping device for calibrating the sheet-shaped film thermocouple sensor, the lead connection mode adopts a mechanical clamping method, and the traditional conductive colloid bonding mode is replaced, so that the lead connection position is not limited by a temperature measurement environment any more, the reliability of a calibration experiment is improved, and a temperature measurement signal can be stably output in a high-temperature environment.

For the reasons, the invention can be widely popularized in the fields of sheet-shaped thin-film thermocouple calibration and the like.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of the clamping device of the present invention.

FIG. 2 is a front view of the clamping device of the present invention.

Fig. 3 is a left side view of the clamping device of the present invention.

FIG. 4 is a top view of the clamping device of the present invention.

FIG. 5 is a three-dimensional schematic view of an outer conical semicircular sleeve of the clamping device of the present invention.

FIG. 6 is a three-dimensional schematic view of an inner tapered sleeve of the clamping device of the present invention.

Fig. 7 is a three-dimensional schematic view of a lead clamp tooling of the clamping device of the present invention.

Fig. 8 is a three-dimensional schematic view of a sheet-like thin-film thermocouple sensor according to an embodiment of the present invention.

In the figure: 1. an inner conical sleeve; 1-1, a graduated scale; 1-2, a sensor card slot; 1-3, cylindrical pins; 1-4, a threaded hole; 1-5, the outer surface of the inner conical sleeve; 1-6, an inner conical sleeve snap ring; 1-7, plate rib grooves; 1-8, inner surface of inner conical sleeve; 2. a long set screw; 3. an outer conical semicircular sleeve; 3-1, cylindrical pin holes; 3-2, asbestos strips; 3-3, the inner surface of the outer conical semicircular sleeve; 3-4, clamping rings of the outer conical semicircular sleeves; 3-5, end face of tail part of the outer conical semicircular sleeve; 4. a lead clamp tool; 4-1, clamping rings of clamp tools; 4-2, square plate ribs; 4-3, the outer surface of the clamp; 4-4, a clamp threaded hole; 4-5, thermocouple clamping grooves; 5. a short set screw; 6. a laminar thin film thermocouple sensor; 6-1, hot end; 6-2, a first thin film thermode; 6-3, a second thin film thermode; 6-4, cold end; 6-5, compensating a first lead; 6-6, a second compensation lead; 6-7, and an insulating substrate.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

As shown in fig. 1 to 4, the present invention provides a multifunctional holding device for calibration of a sheet-like thin-film thermocouple sensor, comprising: the clamp comprises a clamp body, wherein the clamp body is formed by buckling an inner conical sleeve 1 and an outer conical semicircular sleeve 3, and the outer diameter of the inner conical sleeve 1 is the same as the inner diameter of the outer conical semicircular sleeve 3; the two are mutually matched, so that the sealing performance of the device is ensured, and the heat loss in the experimental process is reduced; a sensor clamping groove 1-2 is arranged between the inner conical sleeve 1 and the outer conical semicircular sleeve 3, a sheet-shaped thin film thermocouple sensor 6 to be measured is placed in the sensor clamping groove 1-2, the inner sleeve is inserted into the outer sleeve, and a gap left at the sensor clamping groove 1-2 is blocked by the asbestos strip 3-2. A graduated scale 1-1 is arranged on the right side of the sensor clamping groove 1-2; because the temperatures at different positions during calibration are slightly different, in order to ensure that the temperature measuring end of the thin film thermocouple sensor is fixed and controllable in position during multiple times of calibration, the scale 1-1 can be used for determining the depth of the sheet thin film thermocouple sensor inserted into the hearth, and the temperature measuring deviation is reduced; the front end of the inner conical sleeve 1 is provided with threaded holes 1-4, and the long set screw 2 is utilized to tightly press the sheet-shaped film thermocouple sensor 6 to be measured, so that the phenomenon that the temperature measurement is inaccurate due to shaking in the temperature measurement process is prevented; and a lead clamp tool 4 matched with the inner conical sleeve 1 is arranged in the inner conical sleeve 1, the lead clamp tool 4 adopts a mechanical clamping method, and a short set screw 5 is adopted to tightly press a thermocouple anode compensation lead 6-5 and a thermocouple cathode compensation lead 6-6 to the corresponding thin film thermode I6-2 and the thin film thermode II 6-3 respectively. Compared with a common conductive silver adhesive bonding method, the method is more stable and reliable, and the phenomenon of degumming and open circuit at the lead end under high temperature or severe environment is avoided. The lead clamping mechanism and the inner conical sleeve, the inner conical sleeve and the outer conical semicircular sleeve can be mutually matched, and the overall sealing performance of the device is guaranteed.

As shown in fig. 5 and 6, the front end of the inner conical sleeve 1 is provided with two cylindrical pins 1-3, the front end of the outer conical semicircular sleeve 3 is provided with two cylindrical pin holes 3-1, and the cylindrical pins 1-3 can be inserted into the cylindrical pin holes 3-1 when the inner conical sleeve 1 and the outer conical semicircular sleeve 3 are matched, so that the effect of preventing the relative positions of the two sleeves from rotating left and right or shifting back and forth is achieved. The tail part of the inner conical sleeve 1 is provided with plate rib grooves 1-7, the tail part of the lead clamp tool 4 is provided with square plate ribs 4-2, and when the lead clamp tool 4 is matched with the inner conical sleeve 1, the square plate ribs 4-2 can be inserted into the plate rib grooves 1-7, so that the lead device can be effectively prevented from rotating in the experimental process, and the lead connection is prevented from being loosened or the compensating lead is prevented from being broken.

In a preferred embodiment of the present invention, the materials of the inner conical sleeve 1, the long set screw 2, the outer conical semicircular sleeve 3, the lead wire clamp tool 4 and the short set screw 5 are all high temperature resistant and heat insulating zirconia ceramic materials. Gaps of the sensor clamping grooves 1-2 are filled with high-temperature-resistant and heat-insulating asbestos materials.

As a preferred embodiment of the invention, as shown in FIG. 1, the outer diameter of the inner conical sleeve 1 and the inner diameter of the outer conical semicircular sleeve 3 can be matched with each other by means of tolerance, when the two are buckled, only a sensor slot 1-2 for placing a sheet thin film thermocouple sensor is reserved at the top, and the other parts are tightly jointed, so that the whole sealing performance of the device is ensured, the thermocouple structure is well protected, the thermode is separated from the furnace wall, the loss of thermoelectricity is reduced, and the phenomenon of poor insulation between the thermode and the furnace wall is avoided. Meanwhile, the outer diameter of the outer conical semicircular sleeve 3 is equal to the diameter of the hearth, and the outer sleeve clamping ring 3-4 is used for abutting against the furnace mouth, so that the furnace mouth can be simply and quickly plugged, unnecessary energy loss in the calibration process is reduced, and the accuracy of the calibration result is improved.

In a preferred embodiment of the present invention, the lead clamp tool 4 adopts a mechanical clamping method, and presses the thermocouple compensation lead onto the hot electrode pin by using 4 long set screws 2 with the same length and diameter to complete the conduction of the thermoelectric signal and stably output the temperature measurement signal to the instrument. The thin-film thermocouple base body is fixed by the buckling and pressing action of the inner conical sleeve 1 and the outer conical semicircular sleeve 3, in order to guarantee the temperature measurement stability, the long set screw 2 penetrates through the threaded hole 1-4 of the inner sleeve, so that the thin-film thermocouple sensor 6 is pressed on the tail end face 3-5 of the conical semicircular sleeve, and other gaps are filled by asbestos sliver, thereby improving the sealing property and the reliability of the measurement system.

As a preferred embodiment of the invention, the position between the inner conical sleeve 1 and the outer conical semicircular sleeve 3 is limited by using a cylindrical pin 1-3 with the diameter of 3mm and the length of 3mm, so that the relative position rotation or the relative position movement of the inner conical sleeve 1 and the outer conical semicircular sleeve are prevented in the calibration process; similarly, the position between the lead clamp tool 4 and the inner conical sleeve 1 is limited by using a square plate rib 4-2 with the thickness of 3mm multiplied by 2mm, so that the lead is prevented from being twisted or pulled to cause interruption of a measuring signal in the calibration process.