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Preparation method for temperature-sensitive medium used for temperature-sensitive tubes

A technology of temperature sensing tube and medium, applied in the field of temperature sensing tube, can solve the problems of poor sensitivity of the temperature sensing tube and the inability of continuous phase transition of the temperature sensing medium to achieve the effect of good safety

Inactive Publication Date: 2012-10-17
SHANGYU PATTE VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the existing temperature-sensing tube is used in the solar concentrated hot water system, the temperature-sensing medium cannot achieve continuous phase transition at 89°C-99°C, and can only use the thermal expansion of the temperature-sensing medium in the liquid state to lift the ejector rod. The temperature sensing tube has poor sensitivity due to its low thermal expansion system

Method used

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Experimental program
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Effect test

Embodiment Construction

[0012] The invention discloses a method for preparing a temperature-sensing medium for a temperature-sensing tube, which comprises the following steps:

[0013] Step 1: put C 28 Organic acid, C 30 Organic acid, C 32 Organic acid, C 34 Organic acid, C 36 Five kinds of organic acid materials are put into the container according to the weight percentage of 3%-5%, 15%-17%, 47%-49%, 26%-28%, 4%-6% to form an organic acid mixture, and the organic acid The acid mixture is heated, the heating temperature is 150°C-170°C, and the heating time is 30 minutes-40 minutes to melt the organic acid mixture; the heating temperature and heating time must match, specifically, when the heating temperature is low, such as heating When the temperature is 150°C, the heating time of the organic acid mixture needs to be longer, such as heating for 40 minutes; when the heating temperature is higher, such as when the heating temperature is 170°C, the heating time of the organic acid mixture needs to ...

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PUM

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Abstract

The invention discloses a preparation method for a temperature-sensitive medium used for temperature-sensitive tubes, which comprises the following steps: 1) mixing five organic acids of C28, C30, C32, C34 and C36 according to the weight percentage of 3%-5%, 15%-17%, 47%-49%, 26%-28% and 4%-6% to an organic acid mixture, heating for 30-40 minutes under the temperature of 150-170 DEG C; 2) mixing low carbon alcohol according to mole ratio of 12%-17% to obtain an acid alcohol mixture; 3) dumping a catalyst according to weight percentage of 9%-11%, heating for 30-40 minutes under the temperature of 150-170 DEG C to form an organic fatty mixture; and 4) naturally cooling. The catalyst is iron oxide powder or aluminum oxide powder with fineness of less than 100 nanometers. The temperature-sensitive medium prepared by the preparation method of the present invention possesses a characteristic that phase transition from solid state to liquid state is continuously generated in an temperature range between 89 DEG C and 99 DEG C, and the swelling ratio during the phase transition process is more than 10%. The temperature-sensitive medium is matched with a safety valve in a centralizing water tank in a solar energy centralizing hot water system, and can open the safety valve timely and possesses good security for the solar energy centralizing hot water system.

Description

technical field [0001] The invention relates to a temperature-sensing tube matched with the opening and closing of a safety valve, in particular to a preparation method for a temperature-sensing medium in the temperature-sensing tube. Background technique [0002] When some working places reach a certain temperature, it is necessary to open the safety valve for pressure relief. For example, in the solar centralized hot water system, when the water temperature in the centralized water tank exceeds 99°C, the safety valve must be automatically opened to release the pressure, otherwise it will cause a safety accident. The opening of the safety valve mainly uses the temperature-sensing tube to monitor the temperature of the workplace in real time and opens the safety valve in time when the set temperature is reached. The existing temperature-sensing tube is mainly composed of a tube body, a sealing piston, a spring and a push rod, and the temperature-sensing medium is pre-filled...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
Inventor 赖天庆
Owner SHANGYU PATTE VALVE