Calibratable thermocouple

Abstract

A calibratable thermocouple comprises a base body tube, the lower end of the base body tube is fixedly connected with an alundum tube, a measuring part and a calibrating part are arranged in the base body tube and the alundum tube, the measuring part is composed of a thermocouple, and the calibrating part is composed of an armored thermocouple. The measuring part and the calibration part are used for measuring the temperature, when calibration is not needed, the measuring part and the calibration part measure the temperature at the same time, when calibration is needed, only the calibration part needs to be taken out to calibrate whether the measured value is accurate, and if the precision is not accurate, the equipment needs to be replaced. And through the measuring part and the calibrating part, calibration can be carried out under the condition that the equipment to be detected does not stop, the operation is convenient and fast, and the measuring precision is high.

Description

Technical Field

[0001] This utility model relates to the field of temperature detection, and in particular to a calibrable thermocouple. Background Technology

[0002] Thermocouples are commonly used temperature-sensing elements in temperature measuring instruments. They directly measure temperature and convert the temperature signal into a thermoelectric potential signal, which is then converted into the temperature of the measured medium by an electrical instrument (secondary instrument). The shapes of various thermocouples often differ greatly depending on the application, but their basic structure is roughly the same. They typically consist of thermocouple wires, insulating sheaths, protective tubes, and junction boxes, and are usually used in conjunction with display instruments, recording instruments, and electronic controllers.

[0003] At present, various combustion furnaces are required in the steel and chemical industries, and the converter is one of them. Flue gas is generated in the converter. Since the converter is continuously operated, the temperature of the flue gas in the converter needs to be monitored for a long time without stopping. When thermocouples are used for a long time, they need to be calibrated, otherwise the accuracy of thermocouple temperature measurement will be affected. At present, thermocouples on the market do not have the capability to be calibrated without stopping the machine. Utility Model Content

[0004] The purpose of this invention is to provide a calibrable thermocouple to solve the problems mentioned in the background art.

[0005] The technical problem solved by this utility model is achieved through the following technical solution:

[0006] A calibrable thermocouple includes a base tube with an alumina tube fixedly connected to its lower end. The base tube and the alumina tube contain a measuring section and a calibration section. The measuring section is composed of thermocouples, and the calibration section is composed of armored thermocouples. The detection ends of the thermocouples and the armored thermocouples extend to the bottom of the inner cavity of the alumina tube. The thermocouples are fixed within the inner cavity of the alumina tube. The armored thermocouples are movably installed within the base tube and the alumina tube and can be inserted and removed when needed. The thermocouples and the armored thermocouples extend to the upper exterior of the base tube. Magnetic beads are provided on the thermocouple wires to prevent contact between the wires and improve signal transmission accuracy. A sealing thread is provided at the upper opening of the base tube, and a waterproof connector is provided on the sealing thread to lock the base tube and prevent foreign objects from entering the cavity.

[0007] Preferably, the base tube is provided with a process connection thread, which is connected to the testing equipment.

[0008] Preferably, the corundum tube and the process connection thread are sealed and fixed with high-temperature adhesive.

[0009] The advantages and positive effects of this utility model are:

[0010] This invention employs a two-part temperature measurement system consisting of a measuring unit and a calibration unit. When calibration is not required, both the measuring unit and the calibration unit measure the temperature simultaneously, and the two temperatures are identical. When calibration is required, the calibration unit is simply removed to check the accuracy of the measurement. If the accuracy is inaccurate, the device needs to be replaced; otherwise, it can continue to be used. The measuring unit and calibration unit allow for calibration without shutting down the device under test, making the operation convenient and the measurement accuracy high. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 This is a schematic diagram of the overall structure of a calibrable thermocouple according to the present invention.

[0013] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0014] The markings in the attached diagram are described as follows: 10, base tube; 11, corundum tube; 12, process connection thread; 14, measuring section; 15, calibration section; 16, magnetic bead; 17, sealing thread; 18, waterproof connector; 19, thermocouple; 20, armored thermocouple. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0016] The following is combined with Figure 1-2 This utility model will be described in detail below. For ease of description, the directions mentioned below are defined as follows: the directions of up, down, left, right, front, and back mentioned below are the same as... Figure 1 The directions of front, back, left, right, up, and down in the view are consistent. Figure 1 This is a front view of the device of this utility model. Figure 1 The directions shown are consistent with the front-facing, back-facing, left-right, up-down directions of the device.

[0017] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings:

[0018] Please see Figure 1-2This utility model provides an embodiment of a calibrable thermocouple, comprising a base tube 10, with an alumina tube 11 fixedly connected to the lower end of the base tube 10. A measuring section 14 and a calibration section 15 are provided in the base tube 10 and the alumina tube 11. The measuring section 14 is composed of thermocouples 19, and the calibration section 15 is composed of armored thermocouples 20. The detection ends of the thermocouples 19 and 20 extend to the bottom of the inner cavity of the alumina tube 11. The thermocouples 19 are fixed in the inner cavity of the alumina tube 11, and the armored thermocouples 20 are movably mounted on the base tube 10. The thermocouple 19 and the corundum tube 11 are inserted into and can be removed. When needed, the armored thermocouple 20 can be taken out. The thermocouple 19 and the armored thermocouple 20 extend to the outside of the upper end of the base tube 10. The thermocouple 19 is provided with magnetic beads 16 on the wires. The magnetic beads 16 prevent the wires from contacting each other and improve the accuracy of signal transmission. The upper opening of the base tube 10 is provided with a sealing thread 17. The sealing thread 17 is provided with a waterproof connector 18. The waterproof connector 18 locks the base tube 10 to prevent foreign objects from entering the cavity and to fix the armored thermocouple.

[0019] In another embodiment, the base tube 10 is provided with a process connection thread 12, which is connected to the testing equipment.

[0020] In another embodiment, the corundum tube 11 and the process connection thread 12 are sealed and fixed with high-temperature adhesive.

[0021] In practice, the corundum tube 11 is placed inside the equipment to be tested and connected to the equipment opening via the process connection thread 12, placing the corundum tube 11 inside the equipment. When flue gas or other fluids pass through the corundum tube 11, they transfer heat to the tube. The heat transfer inside the corundum tube 11 is detected by thermocouples 19 and 20, both simultaneously measuring the temperature. Because this equipment is suitable for equipment that requires continuous temperature monitoring during long-term operation, unlike other equipment that can be periodically removed for calibration, this equipment uses a measuring section 14 and a calibration section 15. The measuring section 14 is fixedly installed and continuously measures the temperature, while the calibration section 15 can be removed. When calibration is not required, the measuring section 14 and the calibration section 15 measure the temperature simultaneously, and both temperatures are the same. When calibration is required, only the calibration section 15 needs to be removed to check the accuracy of the measurement. If it is inaccurate, the equipment needs to be replaced; if it is accurate, it can continue to be used. Calibration can be performed without stopping the equipment under test using the measuring section 14 and the calibration section 15, making the operation convenient and the measurement accuracy high.

[0022] It should be emphasized that the embodiments described in this utility model are illustrative rather than limiting. Therefore, this utility model is not limited to the embodiments described in the specific implementation. Any other implementation methods derived by those skilled in the art based on the technical solutions of this utility model are also within the scope of protection of this utility model.

Claims

1. A calibrable thermocouple, comprising a base tube (10), characterized in that: The lower end of the base tube (10) is fixedly connected to the corundum tube (11). The base tube (10) and the corundum tube (11) are provided with a measuring section (14) and a calibration section (15). The measuring section (14) is composed of thermocouples (19), and magnetic beads (16) are provided on the thermocouple wires. The calibration section (15) is composed of armored thermocouples (20). The detection ends of the thermocouples (19) and the armored thermocouples (20) extend to the bottom of the inner cavity of the corundum tube (11). 9) The sheathed thermocouple (20) is fixed in the inner cavity of the corundum tube (11). The sheathed thermocouple (20) is movably installed in the base tube (10) and the corundum tube (11) and can be inserted and removed. The connection of the thermocouple (19) and the sheathed thermocouple (20) extends to the outside of the upper end of the base tube (10). The upper end opening of the base tube (10) is provided with a sealing thread (17). A waterproof connector (18) is provided on the sealing thread (17). The waterproof connector (18) locks the base tube (10).

2. The calibrable thermocouple according to claim 1, characterized in that: The base tube (10) is provided with a process connection thread (12), which is connected to the device to be tested.

3. A calibrable thermocouple according to claim 2, characterized in that: The corundum tube (11) and the process connection thread (12) are sealed and fixed with high-temperature adhesive.

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