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Temperature measurement component capable of achieving small inserting depth precision measurement

A temperature measuring element and precision measurement technology, which is applied in the direction of measuring devices, measuring heat, and thermometers using electric/magnetic elements that are directly sensitive to heat, can solve problems such as errors, and achieve small measurement errors, simple structure, and precise measurement Effect

Pending Publication Date: 2018-05-29
锦州精微仪表有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This temperature measurement principle is actually to measure the temperature of the medium outside the protection tube by measuring the temperature of the inner cavity at the end of the sensor shell. There is a large error in the temperature of the medium outside the tube, as shown in Table 1

Method used

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  • Temperature measurement component capable of achieving small inserting depth precision measurement
  • Temperature measurement component capable of achieving small inserting depth precision measurement
  • Temperature measurement component capable of achieving small inserting depth precision measurement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 2 As shown, the temperature measuring element that can realize small insertion depth precision measurement according to the present invention includes a thermocouple wire 1, a stainless steel sensor housing 2. The thermocouple wires 1 are two and are bare couple wires, and the sensor housing 2 The head is the temperature measuring surface 5 and is provided with two insulated wire holes 201. The insulating ceramic tube 3 is bonded to the inner wall of the insulated wire hole 201 to insulate the inner wall of the insulated wire hole 201 from the sensor housing 1. A thermocouple wire 1 is inserted into the corresponding insulated wire hole 201 from the inside to the outside. The hot end of the thermocouple wire 1 protrudes from the corresponding sensor housing temperature measuring surface 1-10mm (5mm in this embodiment), and is connected to the sensor housing The temperature measuring surface 5 of 2 is welded together by argon arc welding to form a solder jo...

Embodiment 2

[0030] Such as image 3 As shown, the temperature measuring element that can realize small insertion depth precision measurement according to the present invention includes two thermocouple wires 1 and a stainless steel sensor housing 2. The outer surface of the side wall of the sensor housing 2 is provided with heat collecting fins 202 to Increase the temperature of the inner cavity of the sensor housing 1 to reduce measurement errors. The thermocouple wire 1 is a cable-type thermocouple and is composed of a wire core and a braided alkali-free glass yarn insulation material layer wound (or braided) on the wire core, and the wire core is a multi-strand or single-strand thermocouple. The head of the sensor housing 2 is the temperature measurement surface 5 and is provided with two insulated wire vias 201. The insulating ceramic tube 3 is bonded to the inner wall of the insulated wire hole 201, so that the inner wall of the insulated wire hole 201 and the sensor housing 1 Insulat...

Embodiment 3

[0032] Such as Figure 4 , Figure 5 As shown, the first welding spot 4 and the second welding spot 6 protrude from the outer surface of the temperature measuring surface 5 of the sensor housing 2, and the others are the same as in the second embodiment. When measuring, the sensor housing 2 is welded to the connecting pipe 7, the fixing device 9 (using screws or flanges) is welded to the connecting pipe 7, the junction box connecting screw 11 is welded to the connecting pipe 7, and the junction box 10 is connected to the junction box connecting screw 11. The transmitter module 8 is connected with the thermocouple wire lead wire to form an integrated temperature transmitter. The principle of temperature measurement is to measure the temperature of the medium outside the sensor housing by measuring the surface temperature of the outer wall of the sensor housing. When the temperature of solder joint 4 and solder joint 6 are the same, it means that the intermediate conductor does n...

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PUM

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Abstract

The invention relates to a temperature measurement component capable of achieving small inserting depth precision measurement. The component comprises thermocouple wires and a sensor shell; the component is characterized in that multiple insulated threading holes are formed in the temperature measurement surface of the sensor shell, the thermocouple wires are inserted into the insulation threadingholes respectively from inside to outside, and bare wires are arranged on the portions, corresponding to the insulated threading holes, of the thermocouple wires; hot ends of the thermocouple wires are flush with the corresponding temperature measurement surface of the sensor shell, or protrude out of the corresponding temperature measurement surface of the sensor shell and are welded to the corresponding temperature measurement surface of the sensor shell to form a first welding spot and a second welding spot, and sensor shell outer surface temperature measurement is achieved through the first welding post and the second welding spot. The temperature measurement component has the advantaged that the structure is simple, measurement errors are small, and the problem that the measurement results of small inserting depth temperature occasions are inaccurate is thoroughly solved.

Description

Technical field [0001] The invention relates to a temperature measuring sensor element, in particular to a temperature measuring element capable of realizing small insertion depth precise measurement. Background technique [0002] The temperature measuring element is a product used in the industry to measure temperature. The current temperature measuring element on the market generally includes: a protection tube, a thermal resistance or a thermocouple set in the protection tube. Place the thermal resistance (Pt100) or thermocouple in the protection tube, and place the protection tube in the temperature field for temperature measurement. In some occasions, in order to transmit remotely or improve measurement accuracy, a transmitter module can be connected, as follows figure 1 As shown, the temperature measuring element is installed in the protection tube to measure the temperature of the external medium. This kind of temperature measurement principle is actually to measure the t...

Claims

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Application Information

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IPC IPC(8): G01K7/02
CPCG01K7/02
Inventor 杨忠林杨烁
Owner 锦州精微仪表有限公司