Strong-ampere energy-saving explosion-proof electric heater

Abstract

The invention discloses a strong-ampere energy-saving explosion-proof electric heater for heating media of gas, oil, water and the like to raise the temperature of the medium. The explosion-proof electric heater is characterized by mainly comprising an explosion-proof wiring cavity, a pipe plate, an electric heating pipe, a temperature sensor, a temperature-measuring protective pipe, a casting resin cylinder, a filling powder particle cylinder, an exhausting valve seat and the like. The pipe ports of the electric heating pipe and the temperature-measuring protective pipe are respectively welded on a flange plate; the end surface of the flange plate is welded with the filling powder particle cylinder; the circle of the filling powder particle cylinder is welded with the exhausting valve seat; the casting resin cylinder is welded on the end surface of the filling powder particle cylinder; the pipe plate is welded on the external circle of the end surface of the casting resin cylinder; and the explosion-proof wiring cavity is welded on the end surface circle of the pipe plate. The filling powder particle cylinder is internally and compactly filled with insulating, temperature-resistant and heat-transferring powder particles; the casting resin cylinder is internally cast with the insulating and temperature-resistant resin, which is firm after condensation. No temperature-measuring protective pipe is arranged at the front end of the temperature sensor, and the corresponding position of the front end of the temperature sensor is designed and manufactured with an Omega-shaped expansion joint. The invention has the advantages of enough safety and electricity saving.

Description

technical field [0001] The invention is a strong, safe and energy-saving explosion-proof electric heater, which is used in flammable and explosive gas environments (it can also be used in non-flammable and explosive gas environments), converts electric energy into heat energy, and is suitable for various oil, gas, water, etc. The medium is heated to increase the temperature of the medium. Background technique [0002] The original technical solution is mainly composed of explosion-proof wiring cavity, tube plate, heat dissipation sleeve of electric heating tube, heat dissipation sleeve of temperature sensor, flange plate, electric heating tube, temperature sensor, temperature measuring protection tube, etc., and has the following defects: [0003] 1. Insufficient strength and poor safety performance. The heating cavity of the explosion-proof electric heater is sealed with the external environment. In order to achieve the sealing effect, the tube plate and the flange plate a...

AI Technical Summary

Problems solved by technology

[0003] 1. Insufficient strength and poor safety performance

The heating cavity of the explosion-proof electric heater is sealed with the external environment. In order to achieve the sealing effect, the tube plate and the flange plate are welded to the two ends of the heat dissipation sleeve of the electric heating tube and the heat dissipation sleeve of the temperature sensor respectively, and then the electric heating tube and the electric heating tube are connected. Tube cooling sleeve welding, temperature measuring protection tube and temperature sensor cooling sleeve welding, the welding seams on the welding surface are many and scattered, the connection strength is insufficient, and cracks are prone to occur during use; the electric heating tube cooling sleeve, temperature sensor cooling sleeve The pipe diameter is small, the pipe wall thickness is only 1-2mm, and the strength is limited. It is welded to the pipe plate and flange plate. In order to ensure the heat dissipation effect, it is exposed outside for a long time. security incident

[0004] 2. The temperature measurement is not accurate, and the temperature sensor is easily damaged

When the explosion-proof electric heater is working, the temperature is transmitted from the surface of the electric heating tube to the measuring protective tube, and then transmitted from the temperature measuring protective tube to the temperature sensor. The output power cannot be adjusted accurately, resulting in a waste of electric energy; when the electric heating tube is heated, as the temperature rises, the thermal expansion rate of the electric heating tube and the temperature measuring protection tube are inconsistent, so that the temperature measuring protection tube and the electric heating tube are misaligned, which affects the temperature measuring protection tube. The welding part of the tube is affected; after the heating is stopped, the temperature of the electric heating tube drops, and the shortened length of the electric heating tube is inconsistent with the temperature measuring protection tube, which makes the temperature measuring protection tube bend and deform, resulting in damage to the temperature sensor

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