Electric heater with cooling section

Abstract

The utility model provides an electric heater with a cooling section, which comprises a heating pipe and a protective head for fixing the heating pipe, a wiring terminal connected with the heating pipe is arranged in the protection head; the heating pipe is divided into a cooling section and a heating section, the cooling section is connected with the wiring terminal, and a second flange is arranged between the cooling section and the heating section; an electric lead and a resistance wire which are communicated are arranged in the heating pipe, the electric lead is fixed on the wiring terminal, and the lower end of the electric lead is positioned at the middle lower part of the cooling section. The electric heater with the cooling section provided by the utility model is safe to use, simple to operate and low in risk, and completely meets the heating requirement on high-temperature reaction in chemical production at present.

Description

Technical Field

[0001] The utility model relates to an electric heater, in particular to an electric heater with a cooling section. Background Art

[0002] In chemical production, oil bath reactors for high temperature reactions generally use heat transfer oil as the medium, and use electric heaters to heat the heat transfer oil to the required high temperature to meet the needs of chemical reactions. Conventionally used electric heaters use heating resistors with insulating sleeves, which are fixed to the jacket of the reactor via fixed flanges, connected to a power source, and heat the heat transfer oil in the reactor jacket through the heating resistors, thereby achieving the purpose of heating the chemical reaction in the reactor.

[0003] However, this heating method has the following technical problems in the chemical production process:

[0004] (I) Since the heating kettle needs to be constantly turned on and off during the production process, the temperature difference between the heating resistor and the cold and hot resistor is too large, which can easily cause the wiring terminals of the electric heater to loosen. If the wiring terminals are loose, the power supply terminals will not be in contact, causing abnormal heating of the wires and wiring terminals. In large-scale production, accidents such as overheating near the wiring terminals and burning of the heater often occur, seriously affecting the normal progress of production.

[0005] (2) Because the wiring terminals are too close to the heating oil, the heating oil overheats, causing the temperature of the wiring terminals to rise. The high temperature of the wiring terminals causes the local temperature of the heating oil to be too high, which in turn increases the risk of heating oil explosion. Therefore, this type of heater structure has the hidden danger of causing heating oil explosion.

[0006] (III) During the heating process of the heating kettle, due to heat conduction and heating of the terminal, the temperature of the upper part of the flange becomes very high. In addition to the waste of energy caused by the dissipation of this heat, the excessively high temperature will also increase the difficulty of operation for the operator and increase the potential safety hazards in production. Summary of the invention

[0007] In order to solve the above technical problems, the utility model provides an electric heater with a cooling section.

[0008] The technical solution of the utility model is as follows:

[0009] An electric heater with a cooling section comprises a heating tube and a protective head for fixing the heating tube; a wiring terminal connected to the heating tube is arranged in the protective head; the heating tube is divided into a cooling section and a heating section, the cooling section is connected to the wiring terminal, and a second flange is arranged between the cooling section and the heating section; a connected electric wire and a resistance wire are arranged in the heating tube, the electric wire is fixed on the wiring terminal, and the lower end of the electric wire is located in the middle and lower part of the cooling section.

[0010] Furthermore, a first flange is provided on the upper portion of the protective head.

[0011] Furthermore, a first flange threaded hole is provided on the first flange to facilitate connection with the head.

[0012] Furthermore, a second flange threaded hole is provided on the second flange so as to be connected to the reaction kettle through the second flange threaded hole.

[0013] Furthermore, the heating tube is filled with an insulating layer, and the filling material is a conventional electric heating tube insulating material.

[0014] Furthermore, the insulating layer is provided with a partition layer at the connection between the electric conductor and the resistance wire.

[0015] In summary, the utility model has the following beneficial technical effects:

[0016] The utility model has a heating tube with interconnected electric wires and resistance wires. The electric wires basically do not generate heat, so the temperature of the heating section corresponding to the electric wires will be significantly lower than the heating section corresponding to the resistance wires; this prevents the resistance wires from being too hot and directly affecting the temperature of the wiring terminals, reducing the loss of the heater. At the same time, the utility model sets a flange connected to the reactor slightly below the heating tube corresponding to the electric wires. This ensures that the heating oil is heated evenly and does not affect the reaction in the reactor; secondly, the temperature of the cooling section will not be higher than the high temperature that the operator can tolerate, and no additional protective measures are required during normal production operations, ensuring production safety; thirdly, because the wiring terminals and the heat transfer oil are separated by a distance from the cooling section, and the temperature of the wiring terminals does not receive the heat of the resistance wires, the risk of explosion of the heat transfer oil due to the power supply is eliminated.

[0017] The electric heater with a cooling section provided by the utility model has a simple structure, is easy to install and operate, has low use risk, and is completely suitable for the electric heating needs of chemical high-temperature reactions in current large-scale production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the shaft side structure of the utility model;

[0019] Figure 2 It is a top view of the utility model.

[0020] Figure 3 It is a longitudinal sectional view of the utility model.

[0021] Explanation of the accompanying drawings: 1. Protective head; 2. Cooling section; 3. Heating section; 4. Wire tube; 5. First flange threaded hole; 6. Second flange threaded hole; 7. Wiring terminal; 8. First flange; 10. Resistance wire; 11. Electric conductor; 12. Second flange; 13. Insulation layer. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings.

[0023] As attached Figure 1-3 As shown, the utility model provides an electric heater with a cooling section, comprising a heating tube, and a protective head for fixing the heating tube; a wiring terminal connected to the heating tube is arranged in the protective head; the heating tube is divided into a cooling section and a heating section, the cooling section is connected to the wiring terminal, and a second flange is arranged between the cooling section and the heating section; a connected electric wire and a resistance wire are arranged in the heating tube, the electric wire is fixed on the wiring terminal, and the lower end of the electric wire is located at the middle and lower part of the cooling section; a first flange is arranged on the upper part of the protective head; a first flange threaded hole is arranged on the first flange for connecting the head; a second flange threaded hole is arranged on the second flange for connecting to the reactor through the second flange threaded hole; the heating tube is filled with an insulating layer; the insulating layer is provided with a partition layer at the connection between the electric wire and the resistance wire.

[0024] When the utility model is in use, it is fixed to the heat-conducting oil interlayer of the reactor through the second flange threaded hole. When the power is turned on for heating, the temperature of the cooling section is lower than the tolerance temperature of humans due to the provision of the cooling section, and no safety risk is added to the operator.

[0025] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

[0026] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. An electric heater with a cooling section, characterized in that: It includes a heating tube and a protective head for fixing the heating tube; a wiring terminal connected to the heating tube is arranged in the protective head; the heating tube is divided into a cooling section and a heating section, the cooling section is connected to the wiring terminal, and a second flange is arranged between the cooling section and the heating section; a connected electric wire and a resistance wire are arranged in the heating tube, the electric wire is fixed on the wiring terminal, and the lower end of the electric wire is located in the middle and lower part of the cooling section.

2. The electric heater with a cooling section according to claim 1, characterized in that: A first flange is disposed on the upper portion of the protective head.

3. The electric heater with a cooling section according to claim 2, characterized in that: The first flange is provided with a first flange threaded hole for connecting the head.

4. The electric heater with a cooling section according to claim 1, characterized in that: The second flange is provided with a second flange threaded hole so as to be connected to the reaction kettle through the second flange threaded hole.

5. The electric heater with a cooling section according to claim 1, characterized in that: The heating tube is filled with an insulating layer.

6. The electric heater with a cooling section according to claim 5, characterized in that: The insulating layer is provided with a partition layer at the connection between the electric conductor and the resistance wire.

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