CN213120913U - Thermocouple inspection device - Google Patents

Abstract

The utility model relates to the technical field of detection devices, and discloses a thermocouple inspection device, which comprises a main case, a cover plate component, a power supply component, a wind-making component, a ventilation component, a heating component and a feedback display component, wherein the feedback display component acquires and displays a temperature signal from a thermocouple, and the wind-making component, the heating component and the feedback display component are all electrically connected with the power supply component; the main case is provided with an accommodating cavity, the power supply assembly, the feedback display assembly and the air producing assembly are arranged in the accommodating cavity, and the cover plate assembly covers the accommodating cavity; the ventilation assembly penetrates through the main case and is connected with the air producing assembly, and the heating assembly is fixed on the ventilation assembly; the heating assembly comprises a ceramic heating body used for heating the air flow, the ceramic heating body comprises a heating body main body and a plurality of heating sheets connected with the heating body main body, and the adjacent heating sheets are arranged at intervals to form a first channel for the air flow to pass through. The utility model provides a thermocouple inspection device has reduced heating element's fault rate, has improved its stability and heating efficiency.

Description

Thermocouple inspection device

Technical Field

The utility model relates to a detection device technical field especially relates to a thermocouple inspection device.

Background

The thermocouple is a commonly used temperature measuring element in a temperature measuring instrument, and according to the working requirement, a thermocouple checking device is required to be frequently used for detecting the performance of the thermocouple, so that the inspection of the good performance of the thermocouple, the integrity of a measuring circuit of the thermocouple and the insulation of the thermocouple circuit is completed.

The thermocouple checking device has the main functions of blowing out a stable hot air source to the thermocouple and detecting whether a thermocouple circuit works normally. In terms of blowing constant hot air: there are two air-out schemes in the market today:

first, a thermistor (PTCR) made of heat-generating ceramic generates heat as a heat-generating element and then blows out the heat by a blower, and has disadvantages as follows: (1) the PTCR has higher reject ratio, higher manufacturing cost and higher failure rate; (2) the detection system is controlled in an open circuit mode, so that the stability of the equipment in working can not be ensured; (3) during the operation of the PTCR, the PTCR needs to be connected with copper sheets on two heating surfaces for conducting, so that the PTCR needs to be protected by an insulating layer additionally designed on the outer surface of the PTCR under the conditions of exposed wires and the like in the operation process.

The second kind generates heat through the hot resistance wire, then blows off the heat through the hair-dryer, and at the hot resistance wire in-process that generates heat, the resistance wire can burn red, appears mars easily, has the potential safety hazard.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a thermocouple inspection device, it aims at solving current device poor stability, and its heating element fault rate is high, there are technical problem such as potential safety hazard.

The utility model provides a thermocouple inspection device, including mainframe shell, apron subassembly, the power supply module who is used for the power supply, be used for producing the air current system wind subassembly, be used for coming from the heating element that the air current of system wind subassembly carries out the heating, with the air current that system wind subassembly produced transport to the heating element and transport the air current that has heated to the ventilation subassembly of thermocouple and obtain the temperature signal that comes from the thermocouple and give the feedback display module that shows, system wind subassembly, heating element, feedback display module all with power supply module electricity is connected; the main case is provided with an accommodating cavity, the power supply assembly, the feedback display assembly and the wind-making assembly are arranged in the accommodating cavity, and the cover plate assembly covers the accommodating cavity; the ventilation assembly penetrates through the main case and is connected with the air producing assembly, and the heating assembly is fixed on the ventilation assembly; the heating assembly comprises a ceramic heating body used for heating the air flow, the ceramic heating body comprises a heating body main body and a plurality of heating sheets connected with the heating body main body, and the heating sheets are arranged at intervals to form a first channel for the air flow to pass through.

Further, the heating body main part comprises a first main body part and a second main body part which are arranged at intervals, and a second channel for allowing air flow to pass through is arranged between the first main body part and the second main body part.

Furthermore, the plurality of heating sheets extend from one side of the first main body part, which is far away from the second main body part, to the direction far away from the heating body main body part to form a first heating sheet group, and the plurality of heating sheets extend from one side of the second main body part, which is far away from the first main body part, to the direction far away from the heating body main body part to form a second heating sheet group; the heating plates in the first heating plate group are arranged in parallel, and one ends of the heating plates far away from the first main body part are arranged into an arc-shaped structure; the heating plates in the second heating plate group are arranged in parallel, and one ends of the heating plates far away from the second main body part are arranged into an arc-shaped structure.

Further, the ceramic heating body is cylindrical.

Further, the surfaces of the first main body part, the second main body part and the heating sheet are coated with heat-conducting silica gel layers.

Furthermore, the ventilation assembly comprises a first ventilation pipe and a second ventilation pipe, and the heating assembly further comprises a shell sleeved on the ceramic heating body; the shell is fixed between the first ventilation pipe and the second ventilation pipe, one end, far away from the shell, of the first ventilation pipe penetrates through the main case and is connected with the air making assembly, and air flow generated by the air making assembly sequentially flows through the first ventilation pipe, the ceramic heating body and the second ventilation pipe and blows towards the thermocouple.

Furthermore, the thermocouple inspection device also comprises a temperature measuring device for detecting the temperature of the ceramic heating body, and the temperature measuring device feeds back the obtained temperature information to the air making assembly so as to control the size of the air flow.

Further, the temperature measuring device is a platinum resistor arranged on the ceramic heating body.

Further, the air making assembly comprises an air blower and a motor used for driving the air blower to generate air flow, and the motor controls the size of the air flow generated by the air blower according to the temperature information from the temperature measuring device.

Further, the feedback display assembly comprises a signal processing board and a temperature display instrument electrically connected with the signal processing board, and the signal processing board processes the temperature signal from the thermocouple and then feeds the processed temperature signal back to the temperature display instrument for display.

The air-making assembly is arranged and used for generating air flow; the ventilation assembly connected with the air making assembly is arranged, so that the airflow ventilation assembly generated by the air making assembly can blow to the thermoelectric couple conveniently; the heating assembly fixed on the ventilation assembly is arranged, so that the air flow flowing through the ventilation assembly can be heated, and the air flow blown to the thermoelectric couple is hot air flow with a certain temperature; through the ceramic heating body that sets up including heating member main part and heating plate, be equipped with the first passageway that supplies the air current to pass through between the adjacent heating plate, both guaranteed that the air current can pass through heating element, improved the heating efficiency to the flow through air current again to the heating stability is good. The heating body main body and the heating sheet are integrally formed, are made of ceramic materials, and are easy to process, low in cost and low in reject ratio. Therefore, the utility model provides a thermocouple inspection device has reduced heating element's fault rate, has improved the stability and the heating efficiency of its work.

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 described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a thermocouple inspection apparatus according to an embodiment of the present invention;

fig. 2 is an exploded view of a thermocouple inspection device according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a ceramic heating body provided in an embodiment of the present invention;

fig. 4 is a working block diagram of a thermocouple inspection apparatus according to an embodiment of the present invention.

The reference numbers illustrate: 100. a thermocouple inspection device; 1. a main chassis; 11. an accommodating chamber; 111. a first cavity; 112. a second cavity; 113. a third cavity; 2. a cover plate assembly; 21. a first cover plate; 22. a second cover plate; 3. a power supply component; 4. a feedback display component; 41. a signal processing board; 42. a temperature display instrument; 5. a wind producing assembly; 51. a blower; 6. a ventilation assembly; 61. a first vent pipe; 62. a second vent pipe; 7. a heating assembly; 71. a ceramic heating body; 711. a heating body main body; 7111. a first main body portion; 7112. a second main body portion; 712. a heating plate; 7121. a first group of heating fins; 7122. a second group of heating fins; 713. a first channel; 714. a second channel; 72. a housing; 721. a first housing portion; 722. a second housing portion; 10. a temperature control system; 20. and a feedback display system.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

It will also be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

As shown in fig. 1 to 4, a thermocouple inspection apparatus 100 according to an embodiment of the present invention includes a main chassis 1, a cover plate assembly 2, a power supply assembly 3 for supplying power, a wind generation assembly 5 for generating an air current, a heating assembly 7 for heating the air current from the wind generation assembly 5, a ventilation assembly 6 for conveying the air current generated by the wind generation assembly 5 to the heating assembly 7 and conveying the heated air current to a thermocouple, and a feedback display assembly 4 for acquiring a temperature signal from the thermocouple and displaying the temperature signal, wherein the wind generation assembly 5, the heating assembly 7, and the feedback display assembly 4 are electrically connected to the power supply assembly 3; the main case 1 is provided with an accommodating cavity 11, the power supply assembly 3, the feedback display assembly 4 and the air producing assembly 5 are arranged in the accommodating cavity 11, and the cover plate assembly 2 covers the accommodating cavity 11; the ventilation assembly 6 is arranged in the main case 1 in a penetrating way and is connected with the air making assembly 5, and the heating assembly 7 is fixed on the ventilation assembly 6; the heating assembly 7 comprises a ceramic heating body 71 for heating the air flow, the ceramic heating body 71 comprises a heating body main body 711 and a plurality of heating sheets 712 connected with the heating body main body 711, and the adjacent heating sheets 712 are arranged at intervals to form a first channel 713 for the air flow to pass through.

The air making assembly 5 is arranged for generating air flow; the ventilation assembly 6 connected with the air making assembly 5 is arranged, so that the airflow ventilation assembly 6 generated by the air making assembly 5 can be blown to the thermocouple conveniently; the heating assembly 7 fixed on the ventilation assembly 6 is arranged, so that the air flow flowing through the ventilation assembly 6 can be heated, and the air flow blown to the thermoelectric couple is hot air flow with a certain temperature; by arranging the ceramic heating body 71 including the heating body main body 711 and the heating fins 712, and providing the first channel 713 between the adjacent heating fins 712 for the air flow to pass through, it is ensured that the air flow can pass through the heating assembly 7, the heating efficiency of the flowing air flow is improved, and the heating stability is good. The heating body main body 711 and the heating sheet 712 are integrally formed, are made of ceramic materials, and are easy to process, low in cost and low in reject ratio. Therefore, the utility model provides a thermocouple inspection device 100 has reduced heating element's fault rate, has improved the stability and the heating efficiency of its work.

Referring to fig. 3, the heating body main body 711 includes a first main body 7111 and a second main body 7112 which are disposed at an interval, and a second passage 714 through which an air flow passes is disposed between the first main body 7111 and the second main body 7112. The plurality of heating fins 712 extend from the side of the first body portion 7111 away from the second body portion 7112 in the direction away from the heating body main body 711 to form a first heating fin group 7121, and the plurality of heating fins 712 extend from the side of the second body portion 7112 away from the first body portion 7111 in the direction away from the heating body main body 711 to form a second heating fin group 7122. The heating sheets 712 in the first heating sheet group 7121 are arranged in parallel, and one end of the first heating sheet group away from the first main body portion 7111 is arranged in an arc structure. The heating sheets 712 in the second heating sheet group 7122 are disposed in parallel, and one end of the second heating sheet group away from the second main body portion 7112 is arranged in an arc structure. Specifically, the ceramic heating body 71 is cylindrical. The ceramic heating body 71 has the heating characteristic that the heating is performed sequentially from the center to the periphery, the temperature of the center is higher than that of the periphery, the ceramic heating body 71 is arranged into a cylinder and is arranged in the second channel 714 and the plurality of first channels 713, the heating time of the air flow is prolonged, the air flow flowing through the ceramic heating body 71 can be uniformly heated, and the heating performance of the ceramic heating body is enhanced.

In the present embodiment, the surfaces of the first body portion 7111, the second body portion 7112 and the heating plate 712 are coated with a heat conductive silicone layer (not shown). The heat conductivity of the ceramic heater 71 can be increased by providing the heat conductive silicone layer.

Referring to fig. 1 and 2, the ventilation assembly 6 includes a first ventilation pipe 61 and a second ventilation pipe 62, and the heating assembly 7 further includes a housing 72 sleeved on the ceramic heating body 71; the casing 72 is fixed between the first ventilation pipe 61 and the second ventilation pipe 62, one end of the first ventilation pipe 61, which is far away from the casing 72, is penetrated through the main case 1 and connected with the air producing assembly 5, and the air flow generated by the air producing assembly 5 sequentially flows through the first ventilation pipe 61, the ceramic heating body 71 and the second ventilation pipe 62 and blows to the thermocouple. By arranging the heating assembly 7 between the first ventilation pipe 61 and the second ventilation pipe 62, the air flow flowing through the ventilation assembly 6 can be heated, and the air flow sprayed to the thermoelectric couple is hot air with certain temperature; the ceramic heating body 71 is prevented from being directly exposed by arranging the shell 72 sleeved on the ceramic heating body 71, so that potential safety hazards are reduced. In this embodiment, the housing 72 includes a first housing portion 721 and a second housing portion 722, the first housing portion 721 is connected to the first ventilation pipe 61, the second housing portion 722 is connected to the second ventilation pipe 62, and the airflow generated by the air generating assembly 5 flows through the first ventilation pipe 61 and then flows to the second ventilation pipe 62 through the first passage 713 or the second passage 714.

The embodiment of the utility model provides a thermocouple inspection device 100 locates main framework with system wind subassembly 5, makes thermocouple inspection device 100's weight distribution even, and convenient to use person operates. In addition, the first vent pipe 61 and the second vent pipe 62 are long tubular structures, and the specific lengths can be designed according to actual requirements, so that the thermocouple inspection device 100 can be applied to different scenes, for example, the vent assembly 6 is set to be 2-3 meters long, so that the thermocouple inspection device 100 can be conveniently used for inspecting a thermocouple inside an air inlet of an aircraft.

The thermocouple inspection apparatus 100 further includes a temperature measuring device (not shown) for detecting the temperature of the ceramic heating body 71, and the temperature measuring device feeds back the obtained temperature information to the air control assembly 5 to control the magnitude of the air flow. The temperature measuring device is a platinum resistor mounted on the ceramic heating body 71. Specifically, after the temperature measuring device detects the temperature of the ceramic heating body 71, the obtained temperature information of the ceramic heating body 71 is fed back to the air producing assembly 5, and the air producing assembly 5 controls the size of the air flow generated by the ceramic heating body 71 according to the temperature information of the ceramic heating body. When the temperature measuring device detects that the temperature of the ceramic heating body 71 is higher than the required temperature, the temperature information is fed back to the air producing component 5, the air producing component 5 increases the generation of air flow, namely, the ventilation quantity is enhanced, and meanwhile, the ceramic heating body 71 is heated temporarily; when the temperature measuring device detects that the temperature of the ceramic heating body 71 is lower than the required temperature, the temperature information is fed back to the air producing component 5, the air producing component 5 reduces the generation of air flow, namely, the ventilation quantity is weakened, and meanwhile, the ceramic heating body 71 continues to heat; the temperature of the air flow sprayed to the thermocouple is controlled in the above manner to ensure that the temperature of the air flow is constant.

The air producing assembly 5 includes a blower 51 and a motor (not shown) for driving the blower 51 to generate an air flow, and the motor controls the size of the air flow generated by the blower 51 according to temperature information from the temperature measuring device. In this embodiment, the air producing assembly 5 further includes a motor driving board (not shown in the figure), the temperature measuring device feeds back the acquired temperature information of the ceramic heating body 71 to the motor driving board, and the motor driving board adjusts the rotation speed of the motor according to the temperature information to control the size of the air flow generated by the blower 51. In the present embodiment, the blower 51 is a centrifugal blower, and blows an air flow toward the first draft tube 61 by using the centrifugal principle thereof.

The feedback display unit 4 includes a signal processing board 41 and a temperature display 42 electrically connected to the signal processing board 41, and the signal processing board 41 processes the temperature signal from the thermocouple and then feeds the processed temperature signal back to the temperature display 42 for display. Through this kind of setting mode, the temperature of thermocouple can be looked at to the user of being convenient for. In this embodiment, the temperature display instrument 42 is a dual-pointer thermometer, the thermocouple inspection apparatus 100 detects dual thermocouples, and displays the temperatures of the dual thermocouples on the dual-pointer thermometer, and when the temperatures indicated by the dual pointers of the dual-pointer thermometer are the same, it indicates that the dual thermocouples are working normally, and when the temperatures indicated by the dual pointers of the dual-pointer thermometer are different, it indicates that the dual thermocouples are abnormal. In addition, the thermocouple checking apparatus 100 according to this embodiment may also calibrate the dual pointer thermometer, and before the operation of the apparatus, the self-calibration switch is turned on to send the simulated voltage signal to the signal processing board 41, and the signal processing board 41 feeds back the simulated voltage signal to the dual pointer thermometer to self-calibrate the dual pointer thermometer.

Referring to fig. 2, the accommodating cavity 11 includes a first cavity 111, a second cavity 112 and a third cavity 113, the cover plate assembly 2 includes a first cover plate 21 and a second cover plate 22, the power source is fixed in the first cavity 111, the first cover plate 21 covers the first cavity 111, the feedback display assembly 4 is fixed in the second cavity 112, the wind generating assembly 5 is fixed in the third cavity 113, and the second cover plate 22 covers the second cavity 112 and the third cavity 113.

The embodiment of the utility model provides a thermocouple inspection device 100 can be two major systems from the function: a temperature control system 10 and a feedback display system 20.

Referring to fig. 4, a galvanic couple inspection device is connected to a 28V direct current, after the device is started, a ventilation assembly and a ceramic heating body start to work, a blower is driven by a motor to provide sufficient air flow for the ceramic heating body, when a temperature measuring device detects that the temperature of the ceramic heating body is sufficient, the obtained temperature information is fed back to a motor driving board, and the motor driving board adjusts the rotating speed of the motor to control the actual air flow; the signal processing board receives the temperature signal from the thermocouple and feeds the temperature signal back to the temperature display instrument for display, and the signal processing board can also receive an artificial voltage signal for self-correction of the temperature display instrument.

The embodiment of the utility model provides a thermocouple inspection device 100 measuring accuracy is high, and reliability and commonality are good, and volume, weight are moderate, easy operation.

The above is only the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all of which are in the utility model discloses a conceive, utilize the equivalent structure transform that the content of the specification and the attached drawings did, or directly/indirectly use all to include in other relevant technical fields the patent protection scope of the present invention.

Claims (10)

1. The thermocouple inspection device is characterized by comprising a main machine shell, a cover plate assembly, a power supply assembly for supplying power, a wind generating assembly for generating air flow, a heating assembly for heating the air flow from the wind generating assembly, a ventilation assembly for conveying the air flow generated by the wind generating assembly to the heating assembly and conveying the heated air flow to a thermocouple, and a feedback display assembly for acquiring and displaying a temperature signal from the thermocouple, wherein the wind generating assembly, the heating assembly and the feedback display assembly are electrically connected with the power supply assembly;

the main case is provided with an accommodating cavity, the power supply assembly, the feedback display assembly and the wind-making assembly are arranged in the accommodating cavity, and the cover plate assembly covers the accommodating cavity; the ventilation assembly penetrates through the main case and is connected with the air producing assembly, and the heating assembly is fixed on the ventilation assembly;

the heating assembly comprises a ceramic heating body used for heating the air flow, the ceramic heating body comprises a heating body main body and a plurality of heating sheets connected with the heating body main body, and the heating sheets are arranged at intervals to form a first channel for the air flow to pass through.

2. The thermocouple inspection device according to claim 1, wherein the heating body main body includes a first main body portion and a second main body portion which are disposed at an interval in opposition to each other, and a second passage for passing an air flow is provided between the first main body portion and the second main body portion.

3. The thermocouple inspection device according to claim 2, wherein a plurality of the heating fins extend from a side of the first main body portion remote from the second main body portion toward a direction away from the heating body main body to form a first heating fin group, and a plurality of the heating fins extend from a side of the second main body portion remote from the first main body portion toward a direction away from the heating body main body to form a second heating fin group;

the heating plates in the first heating plate group are arranged in parallel, and one ends of the heating plates far away from the first main body part are arranged into an arc-shaped structure;

the heating plates in the second heating plate group are arranged in parallel, and one ends of the heating plates far away from the second main body part are arranged into an arc-shaped structure.

4. The thermocouple inspection device according to claim 3, wherein the ceramic heating body is a cylindrical body.

5. The thermocouple inspection device according to any one of claims 2 to 4, wherein the surfaces of the first body portion, the second body portion and the heating plate are coated with a thermally conductive silicone layer.

6. The thermocouple inspection apparatus according to claim 1, wherein the ventilation assembly includes a first ventilation duct and a second ventilation duct, and the heating assembly further includes a housing fitted over the ceramic heating body; the shell is fixed between the first ventilation pipe and the second ventilation pipe, one end, far away from the shell, of the first ventilation pipe penetrates through the main case and is connected with the air making assembly, and air flow generated by the air making assembly sequentially flows through the first ventilation pipe, the ceramic heating body and the second ventilation pipe and blows towards the thermocouple.

7. The thermocouple inspection device according to claim 1, further comprising a temperature measuring device for detecting a temperature of the ceramic heating body, the temperature measuring device feeding back obtained temperature information to the air generating assembly to control the magnitude of the air flow.

8. The thermocouple inspection apparatus according to claim 7, wherein the temperature measuring means is a platinum resistor mounted on the ceramic heating body.

9. The thermocouple inspection apparatus according to claim 7, wherein said air producing assembly includes a blower and a motor for driving said blower to produce an air flow, said motor controlling the magnitude of the air flow produced by said blower based on temperature information from said temperature measuring device.

10. The thermocouple inspection apparatus according to claim 1, wherein the feedback display assembly includes a signal processing board and a temperature display electrically connected to the signal processing board, the signal processing board processing the temperature signal from the thermocouple and feeding the processed temperature signal back to the temperature display for display.

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