Thermocouple temperature measuring device for microwave heating

Abstract

The utility model discloses a thermocouple temperature measuring device for microwave heating, which relates to the technical field of temperature measuring equipment and comprises a device body and a protection assembly. The device body comprises a thermocouple rod and a mounting seat connected with one end of the thermocouple rod, and the other end of the thermocouple rod is a detection end; the protection assembly comprises a protection layer wrapping the outer wall of the thermocouple rod and a sleeve connected outside the protection layer in a sleeving mode, one end of the sleeve is connected with the installation base, and the other end of the sleeve is sealed. When the thermocouple rod is used, the protective layer and the sleeve form a dual-protection structure, the influence of an electromagnetic field is doubly shielded, and the interference of microwaves on the thermocouple rod is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to temperature measuring equipment technical field especially relates to a kind of thermocouple temperature measuring device for microwave heating. BACKGROUND

[0002] Thermocouple temperature measurement in microwave heating is a device that measures temperature using the thermoelectric effect, and its working principle is based on the Seebeck effect. During microwave heating, the temperature of the heated material rises rapidly, so a temperature measurement tool that can respond quickly and accurately is needed. Thermocouples, as a common temperature sensor, have a wide measurement range, simple structure, and are easy to use, making them suitable for temperature monitoring during microwave heating.

[0003] However, the thermocouple temperature measurement probe directly contacts the measured sample, and is easily damaged physically, such as wear and tear, breakage, etc., resulting in a shortened service life and decreased measurement accuracy. To solve this problem, researchers have begun to explore new materials and technologies to improve the performance and application range of thermocouples, with the most common being thermocouples made of oxidation-resistant coatings or alloy materials. However, the temperature measurement upper limit of traditional metal armored thermocouples is only 1100°C, which limits their application at higher temperatures. To meet the demand for higher temperature measurement, a protective sleeve for thermocouples has emerged. Commonly used is corundum ceramic material to ensure that the thermocouple remains stable in high-temperature environments.

[0004] However, this method has a fatal flaw: microwaves can penetrate corundum ceramic and directly act on the metal wires of the thermocouple, causing the metal wires to heat up or even spark, making this type of thermocouple unsafe for direct use in a microwave field. Therefore, the present application proposes a thermocouple temperature measurement device for microwave heating, which can effectively shield the influence of electromagnetic fields and reduce the interference of microwaves on the thermocouple rod. SUMMARY

[0005] The main purpose of the present application is to provide a thermocouple temperature measurement device for microwave heating, which aims to solve the technical problem that microwaves can penetrate corundum ceramic and directly act on the metal wires of the thermocouple.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A thermocouple temperature measurement device for microwave heating, comprising:

[0008] The device body includes a thermocouple rod and a mounting seat connected to one end of the thermocouple rod, and the other end of the thermocouple rod is a detection end.

[0009] The protective assembly comprises a protective layer wrapped on the outer wall of the thermocouple rod and a sleeve pipe sleeved outside the protective layer, one end of the sleeve pipe is connected with the mounting seat, and the other end of the sleeve pipe is sealed.

[0010] As a further improvement of the utility model, the side wall of the mounting seat adjacent to one end of the thermocouple rod is in interference fit with the inner wall of the open end of the sleeve pipe, the side wall of the mounting seat adjacent to the thermocouple rod is provided with a limiting ring, and the inner wall of the open end of the sleeve pipe is provided with a limiting ring groove matched with the limiting ring; the limiting ring groove is clamped into the limiting ring to prevent the sleeve pipe from slipping off the mounting seat.

[0011] As a further improvement of the utility model, the side wall of the mounting seat adjacent to one end of the thermocouple rod is in interference fit with the inner wall of the open end of the sleeve pipe, the side wall of the mounting seat adjacent to the thermocouple rod is provided with an external thread, and the inner wall of the open end of the sleeve pipe is provided with an internal thread matched with the external thread; the internal thread is threadedly connected with the external thread to prevent the sleeve pipe from slipping off the mounting seat.

[0012] As a further improvement of the utility model, the sealed end of the sleeve pipe is spaced apart from the detection end of the thermocouple rod by a preset distance, and the side wall of the sealed end of the sleeve pipe is densely provided with air permeable holes opposite the area of the detection end of the thermocouple rod.

[0013] As a further improvement of the utility model, the protective layer and the sleeve pipe are both made of beryllium alloy.

[0014] The technical scheme provided by the utility model can have the following beneficial effects:

[0015] In the use process, the thermocouple rod is wrapped with the protective layer, and the sleeve pipe is further arranged outside the protective layer to form a double protection structure; the material capable of stably working in a high-temperature microwave heating environment is adopted; the influence of the electromagnetic field is double shielded; the interference of the microwave on the thermocouple rod is greatly reduced; and the device can be used under a higher temperature condition. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and other objects, features and advantages of the utility model will become more apparent through a more detailed description of the exemplary embodiments of the utility model, which are described in conjunction with the accompanying drawings, in which the same reference numerals in the exemplary embodiments of the utility model generally represent the same components.

[0017] Figure 1 It is a kind of for microwave heating thermocouple temperature measuring device's three-dimensional structure schematic Figure 1 ;

[0018] Figure 2 It is a kind of for microwave heating thermocouple temperature measuring device's three-dimensional structure schematic Figure 2 ;

[0019] Figure 3 is a three-dimensional structural diagram of a thermocouple temperature measuring device for microwave heating Figure 3 ;

[0020] Reference signs:

[0021] 1, device body; 11, thermocouple rod; 12, mounting seat; 121, limiting ring; 122, external thread; 2, protective assembly; 21, protective layer; 22, sleeve; 221, air hole; 222, limiting ring groove; 223, internal thread. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail in combination with the drawings and examples. It should be understood that the described examples are only a part of the examples of the utility model, rather than all the examples. The examples in the utility model and the features in the examples can be combined with each other without conflict. Based on the examples in the utility model, all other examples obtained by the ordinary skilled in the art without creative labor are within the protection scope of the utility model.

[0023] Example One

[0024] Figure 1 An embodiment of the utility model discloses a thermocouple temperature measuring device for microwave heating, which is shown in the figure Figure 1 In the embodiment, the thermocouple temperature measuring device for microwave heating comprises a device body 1 and a protective assembly 2.

[0025] Wherein, referring to the figure Figure 1 The device body 1 comprises a thermocouple rod 11 and a mounting seat 12 connected with one end of the thermocouple rod 11, and the other end of the thermocouple rod 11 is a detection end; the protective assembly 2 comprises a protective layer 21 wrapped on the outer wall of the thermocouple rod 11 and a sleeve 22 sleeved outside the protective layer 21, one end of the sleeve 22 is connected with the mounting seat 12, and the other end of the sleeve 22 is sealed. The double-layer protective structure formed by the protective layer 21 and the sleeve 22 protects the thermocouple rod 11, shields the electromagnetic field in double, reduces the interference of microwaves on the thermocouple rod 11, so that the device can be used under higher temperature conditions, and the application range of the thermocouple temperature measuring device is expanded.

[0026] Further, referring to the figure Figure 1 The sealed end of the sleeve 22 is spaced apart from the detection end of the thermocouple rod 11 by a preset distance, so that the sleeve 22 cannot be connected with the mounting seat 12 due to insufficient length of the sleeve 22.

[0027] Further, referring to the figureFigure 1 The region of the side wall of the sealed end of the sleeve 22 opposite the detection end of the thermocouple rod 11 is densely covered with air permeable holes 221, which form a non-hermetic space inside the sleeve 22, avoiding the rupture or damage of the sleeve 22 caused by the thermal barrier cold shrinkage inside it; at the same time, the detection end of the thermocouple rod 11 contacts the air in the detection area for a shorter time, making the data detected by the device more accurate.

[0028] Optionally, the preset distance between the sealed end of the sleeve 22 and the detection end of the thermocouple rod 11 is [18mm, 22mm], and the distribution area of the air permeable holes 221 along the axial length of the sleeve 22 is [15mm, 25mm].

[0029] Optionally, the materials of the protective layer 21 and the sleeve 22 are both beryllium alloys, which have good electrical conductivity and thermal conductivity and can work stably in a high-temperature microwave heating environment without being easily damaged by high temperature. This improves the durability of the thermocouple rod 11 in harsh environments, reduces the risk of physical damage such as wear and tear, and prolongs the service life of the thermocouple.

[0030] In this embodiment, the thermocouple rod 11 is wrapped with the protective layer 21, and the sleeve 22 is further provided outside the protective layer 21 to form a double protection structure, and materials that can work stably in a high-temperature microwave heating environment are used. The influence of the electromagnetic field is double shielded, greatly reducing the interference of microwaves on the thermocouple rod 11, so that the device can be used at higher temperatures.

[0031] Example Two

[0032] In order to prevent the sleeve 22 from slipping off after being connected to the mounting seat 12, on the basis of Embodiment One, referring to Figure 2 The side wall of the mounting seat 12 adjacent to one end of the thermocouple rod 11 is in interference fit with the inner wall of the open end of the sleeve 22, so that the open end of the sleeve 22 is detachably connected to the mounting seat 12.

[0033] Among them, referring to Figure 2 The side wall of the mounting seat 12 adjacent to the thermocouple rod 11 is provided with a limiting ring 121, and the inner wall of the open end of the sleeve 22 is provided with a limiting ring 121 slot matched with the limiting ring 121, and the limiting ring 121 slot is inserted into the limiting ring 121 to prevent the sleeve 22 from slipping off the mounting seat 12.

[0034] Optionally, the limiting ring 121 and the limiting ring 121 slot are both coaxial ring structures with the sleeve 22.

[0035] In the embodiment, when the outer force drives the sleeve 22 to axially approach the mounting base 12 along the thermocouple rod 11, the limiting ring 121 approaches and makes the limiting ring 121 slot clamped, the sleeve 22 is connected with the mounting base 12 without being easy to slip off under the influence of the outer force; when the outer force drives the sleeve 22 to axially move away from the mounting base 12 along the thermocouple rod 11, the limiting ring 121 is separated from the limiting ring 121 slot, so that the sleeve 22 and the mounting base 12 can be easily separated.

[0036] Example Three

[0037] In order to make the sleeve 22 not easy to slip off after being connected with the mounting base 12, on the basis of the first embodiment, referring to Figure 3 , the side wall of the mounting base 12 adjacent to one end of the thermocouple rod 11 is in interference fit with the inner wall of the open end of the sleeve 22, so that the open end of the sleeve 22 is detachably connected with the mounting base 12.

[0038] Among them, referring to Figure 3 , the side wall of the mounting base 12 adjacent to the thermocouple rod 11 is provided with an external thread 122, and the inner wall of the open end of the sleeve 22 is provided with an internal thread 223 matched with the external thread 122, the internal thread 223 is threadedly connected with the external thread 122, so as to prevent the sleeve 22 from slipping off the mounting base 12.

[0039] In the embodiment, when the outer force drives the sleeve 22 to axially approach the mounting base 12 along the thermocouple rod 11, and the internal thread 223 is threadedly connected with the external thread 122, the sleeve 22 is connected with the mounting base 12 without being easy to slip off under the influence of the outer force; when the outer force drives the sleeve 22 to axially move away from the mounting base 12 along the thermocouple rod 11, and the internal thread 223 is separated from the external thread 122, the sleeve 22 and the mounting base 12 are separated.

[0040] Example Four

[0041] The embodiment provides a use method of the thermocouple temperature measuring device for microwave heating, in the embodiment, the method comprises the following steps:

[0042] Step 1, thermocouple assembly, connecting the open end of the sleeve with the mounting base;

[0043] Step 2, thermocouple installation, connecting one end of the mounting base away from the sleeve with the wall of the microwave heating space, and making one end of the sleeve away from the mounting base to be closest to the object to be heated;

[0044] Step 3, calibration, calibrating the thermocouple in a relatively stable temperature measuring environment, and using a calibrated temperature as a reference quantity in the calibration process, such as a high-precision temperature measuring device such as a pyrometer or a fiber-optic temperature measuring instrument;

[0045] Step 4, on-line measurement, the calibrated thermocouple workpiece is installed in the microwave heating system, the lead is connected to the temperature data collector, and the temperature data collector transmits the collected data into the computer software processing system to realize on-line measurement of the temperature in the microwave heating process.

[0046] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A thermocouple temperature measuring device for microwave heating, characterized by, The utility model relates to a thermocouple protection device, comprising: a device body comprising a thermocouple rod and a mounting seat connected to one end of the thermocouple rod, the other end of the thermocouple rod being a detection end; a protection assembly comprising a protective layer wrapped around the outer wall of the thermocouple rod and a sleeve fitted outside the protective layer, one end of the sleeve being connected to the mounting seat and the other end of the sleeve being sealed; the sealed end of the sleeve is spaced apart from the detection end of the thermocouple rod by a predetermined distance, and the side wall of the sealed end of the sleeve is densely covered with air-permeable holes facing the area of the detection end of the thermocouple rod; the protective layer and the sleeve are both made of beryllium alloy.

2. The thermocouple temperature measuring device for microwave heating according to claim 1, wherein the side wall adjacent to one end of the thermocouple rod of the mounting seat is interference-fitted with the inner wall of the open end of the sleeve, a limiting ring is arranged on the side wall adjacent to the thermocouple rod of the mounting seat, a limiting ring groove is arranged on the inner wall of the open end of the sleeve, the limiting ring groove is clamped into the limiting ring to prevent the sleeve from slipping off the mounting seat.

3. The thermocouple temperature measuring device for microwave heating according to claim 1, wherein the side wall adjacent to one end of the thermocouple rod of the mounting seat is interference-fitted with the inner wall of the open end of the sleeve, an external thread is arranged on the side wall adjacent to the thermocouple rod of the mounting seat, an internal thread is arranged on the inner wall of the open end of the sleeve, and the internal thread is threadedly connected with the external thread to prevent the sleeve from slipping off the mounting seat.

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