Electric heater for director of pressure regulator

Abstract

The invention relates to an electric heater for a director of a pressure regulator. The electric heater comprises a heating part and a control part. The heating part comprises a heating casing, wherein a heating rod is arranged in the heating casing and is in weld connection with a U-shaped opening of the heating casing. The control part comprises a middle shaft, a front cover and a rear cover, wherein the front cover and the rear cover are arranged on the front side and the rear side of the middle shaft and are in threaded connection with the middle shaft, and the front cover, the middle shaft and the rear cover form a control casing of the control part. A connection end connected with the heater is arranged on the middle shaft, the connection end and the middle shaft are made integrally, an internal thread is arranged at the connection end, an external thread is arranged at the upper end of the heating rod, and the upper end of the heating rod is in threaded connection with the connection end. The connection end and the middle shaft are made integrally, and the connection end is in threaded connection with the upper end of the heating rod, so that connection between the heating part and the control part is simplified. The heating casing is in weld connection with the heating rod, so that sealing performance of the heating part is improved, and the safety of the electric heater for the director of the pressure regulator is improved.

Description

technical field [0001] The invention relates to the technical field of natural gas heating devices, in particular to an electric heater for heating the gas entering the pilot of a pressure regulator. Background technique [0002] Pilot regulators are widely used in the transportation of natural gas. Since the natural gas pressure drops by 0.1MPa, the natural gas temperature will drop by 0.4-0.5°C. In addition, the ambient temperature in winter will also be low. If the natural gas contains a small amount of moisture, it will easily cause the pilot of the regulator to freeze, thus affecting the regulator. The pressure regulating performance of the pressure regulator can easily lead to serious accidents. It turns out that the traditional method is to wrap the electric heating cable on the conductor of the voltage regulator, and add insulation materials to ensure the normal operation of the voltage regulator. inconvenient. In order to solve the above problems, the patent docu...

AI Technical Summary

Problems solved by technology

Since the natural gas pressure drops by 0.1MPa, the natural gas temperature will drop by 0.4-0.5°C. In addition, the ambient temperature in winter will also be low. If the natural gas contains a small amount of moisture, it will easily cause the pilot of the regulator to freeze, thus affecting the regulator. The pressure regulating performance of the pressure regulator is easy to cause serious accidents

It turns out that the traditional method is to wrap the electric heating cable on the conductor of the voltage regulator, and add insulation materials to ensure the normal operation of the voltage regulator. inconvenient

In order to solve the above problems, the patent document with the patent number 201320884431.X invented a natural transmission and distribution regulator heating device, which effectively solved the problem that the pilot cannot work normally due to the low temperature of the flowing gas in the pilot

However, there are still some deficiencies in the heating device of the above-mentioned natural gas transmission and distribution pressure regulator. The heating device includes a heating part and a control part. Leakage may cause irreversible safety accidents

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