Method for weakening side moment of thermocouple protecting tube and device thereof
A protection tube and thermocouple technology, which is applied in the direction of using electrical devices, measuring devices, thermometers with electrical/magnetic components directly sensitive to heat, etc. Force instability and other problems, to reduce the instability of detection data, shorten the length, and weaken the impact.
Inactive Publication Date: 2011-09-14
HUADIAN HEAVY IND CO LTD
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Problems solved by technology
The protection tube will be impacted by the heat medium on the thermocouple protection device in the medium container, and a lateral moment will be generated on the protection tube, and the longer the length of the protection tube in the medium container, the greater the lateral moment. This impact force sometimes It is not stable yet, causing the protection tube to have a pendulum effect, and it is easy to cause the thermocouple protection tube to break due to fatigue
In addition, after the high-temperature thermocouple protection device is heated and expanded, the weld seam on the thermocouple protection device restricts the free expansion of the protection tube, which is easy to generate thermal stress and cause cracks in the weld seam. It is extremely easy to damage or leak, and cause safety or quality accidents
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[0021] A method and device for weakening the torque on the side of the thermocouple protection tube of the present invention will be further described in detail in conjunction with the accompanying drawings and embodiments, but it is not used as a basis for any limitation of the present invention.
[0022] Example. A kind of method of weakening thermocouple protective tube side moment of the present invention, such as figure 1 shown. It is to set the temperature sensing section 8 and the diversion section 9 on the protection tube 5 outside the medium container 1, to weld the tube seat 2 on the medium container, and to connect the sealing section 7 at the upper end of the temperature sensing section 8 of the protection tube to the tube seat 2 Welding, the diameter of the temperature-sensing section is smaller than the diameter of the sealing section, forming a gap in the tube seat where the measured medium can enter, and through the gap of the triangular prism of the diversion...
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The present invention discloses a method for weaken side moment of thermocouple protecting tube and device thereof. According to the method, through setting a temperature sensing segment and a flow guiding segment on the protecting tube outside a medium container, the length L of the protecting tube extending into the medium container is shortened; and through changing the shape of the probe of the protecting tube, which is inserted into the medium container, the side moment on the thermocouple protecting tube is weakened. The device includes a protecting tube (5) which is provided with a thermocouple blind hole (6). The protecting tube is sequentially provided with the probe (10), a flow guiding segment (9), the temperature sensing segment (80 and the sealing segment (7). The protecting tube (5) penetrates a tube base (2) and a through-hole probe of the medium container (1) is inserted into the medium container. A sealing segment is welded with the tube base. The flow guiding segmentis matched with the through hole on the medium container. The method for weaken side moment of thermocouple protecting tube and the device according to the invention can weaken the pendulum effect generated by the side moment on the thermocouple protecting tube, prevents the fatigue fracture of the thermocouple protecting tube; and simultaneously increases the welding reliability between the thermocouple protecting device and the medium container.
Description
technical field [0001] The invention relates to a thermocouple protection device method and device, in particular to a method and device for weakening the side torque of a thermocouple protection tube. Background technique [0002] At present, thermocouples with thermocouple protection devices are often used to measure the heat medium in the medium container (pipeline or equipment) of thermal power plants. When measuring, the protection tube in the thermocouple protection device needs to be inserted into the medium container for measurement. Moreover, in order to ensure the accuracy of the measurement, the temperature sensing length of the thermocouple protection tube has certain requirements. Because the heat medium in the medium container usually has very high temperature, pressure, and flow rate is also very high. The protection tube will be impacted by the heat medium on the thermocouple protection device in the medium container, and a lateral moment will be generated ...
Claims
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IPC IPC(8): G01K7/02
Inventor 张洪元
Owner HUADIAN HEAVY IND CO LTD