Multi-point thermocouple liquid level detector with high frequency induced eddy current heating
A liquid level detector and eddy current heating technology, which is applied to the liquid level indicator for physical variable measurement, reactor, nuclear power generation, etc., can solve the problems of large size of sensitive components and long response time, and achieve fast response speed and simple production. , The effect of fast and sensitive liquid level
Pending Publication Date: 2019-03-26
NINGBO AUQI AUTO INSTR EQUIP
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Problems solved by technology
In addition, the existing hot-end heating type thermocouple liquid level sensor or segmental heating type thermocouple liquid level sensor has the disadvantage of long response time due to the use of resistance wire heating and the large size of the sensitive element.
Method used
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Embodiment Construction
[0014] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0015] Such as figure 1 As shown, a multi-point thermocouple liquid level detector with high-frequency induction eddy current heating includes a coil 6, and the coil 6 contains three armored thermocouples 5, and the hot end sleeve of the armored thermocouple is filled with magnetically conductive Metal such as nickel, or weld a piece of magnetically conductive metal block such as nickel on the outer casing of the hot end, or the armored thermocouple itself is a magnetically conductive thermocouple such as a K-type thermocouple, and the other armored thermocouple 9 is non-conductive. A magnetic sheathed thermocouple, such as a T-type thermocouple, is located at the bottom of the detector.
[0016] The above-mentioned coil 6 is plated with high-temperature insulating silver, and the outer side of the coil 6 is covered with two layers of metal p...
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The invention relates to a multi-point thermocouple liquid level detector with high frequency induced eddy current heating. The detector includes a protection sleeve, a heating coil, an armored thermocouple and a heated armored thermocouple, wherein the heating coil, the armored thermocouple and the heated armored thermocouple are arranged in a pressure bearing sleeve, the armored thermocouple isarranged at a bottom portion of the pressure bearing sleeve, the heating coil is internally provided with the heated armored thermocouple, the heated armored thermocouple is formed through filling a magnetic conduction metal into a thermal end sleeve of the armored thermocouple, or one segment of magnetic conduction metal block is welded outside the thermal end sleeve, or the armored thermocoupleitself is a magnetic conduction thermocouple, and the armored thermocouple and the heated armored thermocouple form a thermocouple measurement pair for liquid level measurement.
Description
technical field [0001] The invention relates to a heating type thermocouple liquid level sensor, which is used for measuring the liquid level (liquid level) in a container or a liquid storage pool. Background technique [0002] Most of the liquid level sensors used in pressure vessels of pressurized water reactor nuclear power plants and high-temperature and high-pressure boilers or liquid storage tanks in thermal power plants, which require high reliability, mostly use differential pressure liquid level gauges, float level gauges, Magnetic level gauges and liquid level gauges such as transparent glass tube plates, some of these level gauges are indirect measurements, some are not reliable, and some have a short service life. In some occasions where high reliability is required, the reliability of liquid level measurement is directly related to the safety of production equipment and personal safety, so there is an urgent need for a high reliability device that can directly m...
Claims
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IPC IPC(8): G01F23/22G21C17/00
CPCG21C17/00G01F23/22Y02E30/30
Inventor 孙智超查美生陈臻郑典俊
Owner NINGBO AUQI AUTO INSTR EQUIP