A high-precision thermocouple cold end compensation device

Abstract

This utility model discloses a high-precision thermocouple cold junction compensation device, comprising: a base, a housing, a placement component, a thermometer, a stirring component, and a heating plate. The housing is located on top of the base, and the placement component is located on top of the housing. The placement component is used to place the thermocouple cold junction. The thermometer is located on top of the housing, the stirring component is located at the bottom of the housing, and the heating plate is located at the bottom of the housing. The heating plate is used to control the temperature inside the housing. A liquid inlet pipe is inserted and connected to the top of the housing. The design of the base, housing, placement component, thermometer, stirring component, and heating plate of this utility model allows the thermocouple cold junction to be placed inside the placement component during use. The heating plate adjusts the liquid inside the housing to the required temperature, and the thermometer monitors the temperature inside the housing in real time. By stabilizing the temperature inside the housing, the temperature of the thermocouple cold junction is stabilized.

Description

Technical Field

[0001] This utility model relates to the field of compensation device technology, and in particular to a high-precision thermocouple cold junction compensation device. Background Technology

[0002] Thermocouples are based on the Seebeck effect: when there is a temperature difference between the two ends of two different metals, a thermoelectric potential (voltage) is generated. The output voltage actually reflects the temperature difference between the hot junction (measuring junction) and the cold junction (reference junction), rather than the absolute temperature of the hot junction. Therefore, to obtain the true temperature of the hot junction, the accurate temperature of the cold junction must be known. When the temperature of the cold junction is unstable, it will cause the measured temperature to deviate from the actual temperature, thus affecting its use. Therefore, this solution proposes a high-precision thermocouple cold junction compensation device to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to provide a high-precision thermocouple cold junction compensation device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a high-precision thermocouple cold junction compensation device, comprising:

[0005] Base;

[0006] The housing is located on top of the base;

[0007] A placement assembly is disposed on the top of the housing and is used to place the cold junction of the thermocouple.

[0008] The thermometer is mounted on the top of the enclosure;

[0009] A stirring assembly is disposed at the bottom of the housing;

[0010] A heating plate is located at the bottom of the chamber and is used to control the temperature inside the chamber.

[0011] Preferably, a liquid inlet pipe is inserted and connected to the top of the box, and a first valve is provided in the middle of the liquid inlet pipe.

[0012] Preferably, a liquid outlet pipe is inserted and connected to the bottom of the box, and a second valve is provided in the middle of the liquid outlet pipe.

[0013] Preferably, the placement component includes:

[0014] Mounting plate, which is inserted and connected to the top of the housing;

[0015] The test tube is inserted and connected in the middle of the mounting plate, and the interior of the test tube is filled with thermally conductive silicone grease.

[0016] Clips are inserted and connected to the middle of the test tube.

[0017] Preferably, the stirring assembly includes:

[0018] A stirring shaft is inserted and connected to the inner wall at the bottom of the housing;

[0019] Agitator blades, which are fixedly connected to the outer wall of the agitator shaft;

[0020] The motor is fixedly connected to the bottom end of the stirring shaft.

[0021] Preferably, the top of the base has a first mounting groove, and the motor is inserted into the first mounting groove. The top of the base has a second mounting groove, and the heating plate is inserted into the second mounting groove.

[0022] Preferably, a sealing ring is provided at the connection between the stirring shaft and the housing, and the sealing ring is used to seal the connection between the motor and the housing.

[0023] The technical effects and advantages of this utility model are as follows:

[0024] The design of this utility model, including the base, box, placement component, thermometer, stirring component, and heating plate, involves placing the cold end of the thermocouple inside the placement component during use. The heating plate is used to adjust the liquid inside the box to the required temperature, and the thermometer monitors the temperature inside the box in real time. By stabilizing the temperature inside the box, the temperature of the cold end of the thermocouple is stabilized. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0026] Figure 2 This is a top view of the structure of this utility model.

[0027] Figure 3 This is a front cross-sectional view of the present invention.

[0028] Figure 4 This utility model Figure 3 Enlarged structural diagram of section A.

[0029] In the diagram: 1. Base; 101. First mounting slot; 102. Second mounting slot; 2. Housing; 201. Liquid inlet pipe; 202. First valve; 203. Liquid outlet pipe; 204. Second valve; 3. Placement assembly; 301. Mounting plate; 302. Test tube; 303. Thermal grease; 304. Clip; 4. Stirring assembly; 401. Motor; 402. Stirring shaft; 403. Stirring blade; 5. Thermometer; 6. Heating plate; 7. Sealing ring. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] This utility model provides, for example Figure 1-4 Shown:

[0032] Example 1;

[0033] A high-precision thermocouple cold junction compensation device, comprising:

[0034] Base 1;

[0035] Box 2, Box 2 is set on top of base 1;

[0036] Placement component 3 is located on the top of housing 2 and is used to place the cold junction of the thermocouple.

[0037] Thermometer 5 is located on the top of box 2;

[0038] Stirring component 4 is located at the bottom of the housing 2;

[0039] Heating plate 6 is located at the bottom of the chamber 2 and is used to control the temperature inside the chamber 2.

[0040] It should be noted that the enclosure 2 is used to store liquid, and the heating plate 6 is an existing heating device that converts electrical energy into heat energy. Its working principle is that when current passes through the built-in high-resistance alloy heating element (such as nichrome wire), heat is generated due to the resistance effect, and the heat is transferred to the enclosure 2 to heat the liquid inside the enclosure 2. The stirring component 4 is used to stir the liquid inside the enclosure 2. The thermometer 5 is an existing electric heating thermometer. The resistance thermometer is a high-precision temperature measuring instrument based on the principle that the resistance of a metal conductor changes with temperature. It is used to detect the temperature inside the enclosure 1. In use, liquid is first introduced into the enclosure 2, the temperature of the liquid inside the enclosure 2 is controlled by the heating plate 6, and the temperature inside the enclosure 2 is monitored by the thermometer 5. The cold junction of the thermocouple is inserted into the placement component 3 to stabilize the temperature of the cold junction of the thermocouple.

[0041] Specifically, an inlet pipe 201 is inserted and connected to the top of the box body 2, and a first valve 202 is provided in the middle of the inlet pipe 201. An outlet pipe 203 is inserted and connected to the bottom of the box body 2, and a second valve 204 is provided in the middle of the outlet pipe 203.

[0042] It should be noted that the first valve 202 and the second valve 204 are both existing ball valves used to control the flow of liquid in the inlet pipe 201 and the outlet pipe 203. During use, both the first valve 202 and the second valve 204 are closed to prevent liquid from entering and exiting the tank 2. When it is necessary to replace the liquid inside the tank 2, first open the second valve 204 to drain the liquid inside the tank 2, then close the second valve 204, open the first valve 202, and inject the liquid into the tank 2. After the injection is completed, close the first valve 202.

[0043] Specifically, component 3 includes:

[0044] Mounting plate 301 is inserted and connected to the top of the housing 2;

[0045] Test tube 302 is inserted and connected to the middle of mounting plate 301, and thermal grease 303 is installed inside test tube 302;

[0046] Clip 304 is inserted and connected to the middle of test tube 302.

[0047] It should be noted that the clamp 304 is made of existing deformable alloy material and is fixed inside the test tube 302. When it is necessary to fix the position of the cold end of the thermocouple, the cold end of the thermocouple is directly inserted into the inside of the test tube 302, and the cold end of the thermocouple is clamped and restricted inside the test tube 302 by multiple clamps 304. The thermal grease 303 is a highly thermally conductive paste-like semi-fluid material used to enhance heat transfer.

[0048] Example 2;

[0049] The stirring component 4 is used in the compensation device in Example 1;

[0050] Specifically, the stirring component 4 includes:

[0051] A stirring shaft 402 is inserted and connected to the inner wall at the bottom of the housing 2;

[0052] A stirring blade 403 is fixedly connected to the outer wall of the stirring shaft 402.

[0053] Motor 401 is fixedly connected to the bottom end of stirring shaft 402.

[0054] Specifically, the top of the base 1 has a first mounting groove 101, and the motor 401 is inserted into the inside of the first mounting groove 101. The top of the base 1 has a second mounting groove 102, and the heating plate 6 is inserted into the inside of the second mounting groove 102.

[0055] It should be noted that the motor 401 is an existing servo motor. In use, the motor 401 drives the stirring shaft 402 to rotate, and the stirring shaft 402 drives the stirring fan blades 403 to stir inside the tank 2, thereby agitating the liquid inside the tank 2.

[0056] Specifically, a sealing ring 7 is provided at the connection between the stirring shaft 402 and the housing 2. The sealing ring 7 is used to seal the connection between the motor 401 and the housing 2.

[0057] It should be noted that the sealing ring 7 is made of rubber. During use, the sealing ring 7 is deformed by the extrusion of the stirring shaft 402, and the deformed sealing ring 7 seals the connection between the stirring shaft 402 and the box 2, preventing the liquid inside the box 2 from overflowing from the connection between the stirring shaft 402 and the box 2.

[0058] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-precision cold junction compensation device for thermocouples, characterized in that, include: Base (1); Box (2), the box (2) is set on top of base (1); Placement component (3), which is disposed on the top of housing (2), is used to place the cold junction of thermocouple; Thermometer (5), which is located on the top of the box (2); A stirring assembly (4) is disposed at the bottom of the housing (2); Heating plate (6) is located at the bottom of the box (2) and is used to control the temperature inside the box (2).

2. A high-precision thermocouple cold junction compensation device according to claim 1, characterized in that, The top of the box (2) is connected to an inlet pipe (201), and a first valve (202) is provided in the middle of the inlet pipe (201).

3. The high-precision thermocouple cold junction compensation device of claim 1, wherein, The bottom of the box (2) is connected to a liquid outlet pipe (203), and a second valve (204) is provided in the middle of the liquid outlet pipe (203).

4. The high-precision thermocouple cold junction compensation device of claim 1, wherein, The placement component (3) includes: Mounting plate (301), which is inserted and connected to the top of the housing (2); Test tube (302), the test tube (302) is inserted and connected to the middle of the mounting plate (301), and the interior of the test tube (302) is provided with thermal conductive silicone grease (303). Clip (304) is inserted and connected to the middle of test tube (302).

5. A high-precision thermocouple cold junction compensation device according to claim 1, characterized in that, The stirring assembly (4) includes: A stirring shaft (402) is inserted into the inner wall at the bottom of the housing (2); A stirring blade (403) is fixedly connected to the outer wall of the stirring shaft (402); The motor (401) is fixedly connected to the bottom end of the stirring shaft (402).

6. A high-precision cold junction compensation device for thermocouples as claimed in claim 5, characterized in that The top of the base (1) is provided with a first mounting groove (101), the motor (401) is inserted into the inside of the first mounting groove (101), the top of the base (1) is provided with a second mounting groove (102), and the heating plate (6) is inserted into the inside of the second mounting groove (102).

7. A high-precision cold junction compensation device for thermocouples as claimed in claim 5, characterized in that A sealing ring (7) is provided at the connection between the stirring shaft (402) and the housing (2), and the sealing ring (7) is used to seal the connection between the motor (401) and the housing (2).

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