Electric heating furnace for heating flange plate

Abstract

The utility model discloses an electric heating furnace for heating a flange plate, which comprises a furnace body, a hot air channel inner diameter is arranged in a cavity of the furnace body, ceramic electric heating rings are arranged in the hot air channel inner diameter, the number of the ceramic electric heating rings is three, and the ceramic electric heating rings are distributed in an annular array by taking the center line of the hot air channel inner diameter as a circle center; the electric heating furnace comprises a furnace body, ceramic electric heating rings are arranged in the furnace body, the ceramic electric heating rings are externally connected with outgoing cables, the outgoing cables extend outwards to the outside of the furnace body, the furnace body is communicated with a drying chamber, the structure of the electric heating furnace for heating the flange plate affects the heating time of air in the furnace body, and the number of the ceramic electric heating rings is three. And the heat effect time of the furnace body is prolonged, the heat transfer effect is enhanced, the temperature fluctuation of the drying chamber is small, the temperature stability is higher, and the better temperature control effect is achieved through the structure that the hot air channels are distributed in an annular array mode with the center line of the inner diameter of the hot air channel as the circle center.

Description

Technical Field

[0001] The utility model relates to the technical field of heating furnaces, and specifically relates to an electric heating furnace used for heating flanges. Background Art

[0002] In the related art, a flange is a connecting component used between shafts and between pipe ends. It is a connecting component commonly used in existing mechanical processing. The flange needs to be heated during the manufacturing process.

[0003] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0004] From the principle of heat energy generation, it is obvious that the electric heating furnace directly converts heat energy from electrical energy, does not produce a lot of smoke, and is a more economical and environmentally friendly drying method. However, the design of the electric heating furnace in actual application does not fully consider the heat transfer control of the heat source equipment and the heat transfer channel. The thermal efficiency of the dryer is not high, which affects the precise control of the flange heating temperature. At the same time, when the heat transfer is low, the heat loss of the electric heating furnace increases, and a large amount of electrical energy is lost. Utility Model Content

[0005] The purpose of the utility model is to provide an electric heating furnace for heating a flange to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electric heating furnace for heating a flange, comprising a furnace body, a hot air channel inner diameter is arranged in the cavity of the furnace body, a ceramic electric heating ring is arranged inside the hot air channel inner diameter, the number of the ceramic electric heating rings is 3, and they are distributed in a circular array with the midline of the hot air channel inner diameter as the center; an external outlet cable is connected to the ceramic electric heating ring, and the outlet cable extends outward to the outside of the furnace body.

[0007] Preferably, the furnace body is communicated with a drying chamber, and a temperature sensor is provided in the cavity of the drying chamber.

[0008] Preferably, a hot air lower channel is provided on the lower side of the drying chamber, and a feed port is provided on the upper side of the drying chamber.

[0009] Preferably, a discharge port and a drying chamber observation port are provided at the tail end of the drying chamber, and the height of the drying chamber observation port is greater than the height of the discharge port.

[0010] Preferably, a vent is provided at the top of the drying chamber.

[0011] Preferably, a cross fixing bracket is provided in the middle of the ceramic electric heating coil.

[0012] Compared with the prior art, the beneficial effects of the utility model are: the structure of an electric heating furnace for heating a flange provided by the utility model affects the heating time of air inside the furnace body, the number of ceramic electric heating rings is 3, and the structure distributed in a circular array with the midline of the inner diameter of the hot air channel as the center of the circle extends the thermal effect time of the furnace body and enhances the heat transfer effect. The temperature fluctuation in the drying chamber is smaller, the temperature stability is higher, and the temperature control effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the internal structure of the furnace body of the utility model;

[0014] Figure 2 It is a schematic diagram of the external structure of the utility model.

[0015] In the figure: 1. furnace body; 2. inner diameter of hot air channel; 3. ceramic electric heating coil; 4. outgoing cable; 5. drying chamber; 6. temperature sensor; 7. feed port; 8. discharge port; 9. drying chamber observation port; 10. ventilation port; 11. cross fixing bracket. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figure 1-2The utility model provides a technical solution: an electric heating furnace for heating a flange, comprising a furnace body 1, a hot air channel inner diameter 2 is arranged in the cavity of the furnace body 1, a ceramic electric heating ring 3 is arranged inside the hot air channel inner diameter 2, the ceramic electric heating ring 3, three 3kW ceramic heater elements are used to form a three-tube electric heating furnace, the ceramic material electric heater has high heat resistance, the surface temperature can reach 9000℃, and it can be heated continuously for 1O00h, the number of ceramic electric heating rings 3 is 3 and they are distributed in a ring array with the center line of the hot air channel inner diameter 2 as the center, the three ceramic electric heating rings form a triangular structure, the power is 9kW, the outer diameter of the ceramic heater is 0.22m, the inner diameter is 0.17m, and the hot air channel diameter is 0.68m. When the same ceramic heater material is used, the change of the electric heating furnace structure has a greater impact on the thermal efficiency. When the electric heating furnace body structure is different, the area and path of air flowing through the furnace body are different, which directly affects the heating time of the air in the electric heating furnace, thereby affecting the thermal efficiency of the electric heating furnace. According to the basic principles of heat transfer, the longer the air is heated in the electric heating furnace, the higher the thermal efficiency is. The ceramic heater element is made of sealed casting of ceramic material, and has the characteristics of high temperature resistance, good heat transfer performance, and good insulation. The ceramic electric heating coil 3 is connected to an external outgoing cable 4, and the outgoing cable 4 extends outward to the outside of the furnace body 1.

[0018] Specifically, the furnace body 1 is connected to the drying chamber 5, and a temperature sensor 6 is provided in the cavity of the drying chamber 5. In the heating stage, the average temperature difference between the drying chamber and the outlet of the electric heating furnace is about 21cC, and the heating time to reach the target temperature is 40min; in the constant temperature stage, the average temperature difference between the drying chamber and the outlet of the electric heating furnace is about 16°C, and the temperature deviation is ±1°C; in the cooling stage when heating is stopped, the cooling curves of the electric heating furnaces under the two structures are close. Compared with the outlet temperature, the drying chamber temperature shows a certain delay lag, which is a common property of temperature control systems.

[0019] Specifically, a hot air lower channel is provided at the lower side of the drying chamber 5, a feed port 7 is provided at the upper side of the drying chamber 5, and a conveyor belt for slowly conveying the flange is provided in the drying chamber 5, which performs a slow conveying or stopping operation, and the flange to be heated enters from the feed port 7.

[0020] Specifically, a discharge port 8 and a drying chamber observation port 9 are provided at the tail end of the drying chamber 5 to facilitate observation of the conditions inside the drying chamber 5 and the working progress of the heating flange. The height of the drying chamber observation port 9 is greater than that of the discharge port 8 .

[0021] Specifically, a vent 10 is provided at the upper portion of the drying chamber 5 .

[0022] Specifically, a cross fixing bracket 11 is provided in the middle of the ceramic electric heating coil 3 to maintain the stability of the structure of the ceramic electric heating coil 3 .

[0023] Working principle: When the utility model is working, the combined structure of the hot air channel inner diameter 2 and the ceramic electric heating ring 3 affects the heating time of the air inside the furnace body 1. The number of the ceramic electric heating rings 3 is 3, and the structure distributed in a circular array with the midline of the hot air channel inner diameter 2 as the center prolongs the thermal effect time of the furnace body 1 and enhances the heat transfer effect. The temperature fluctuation of the drying chamber 5 is smaller, the temperature stability is higher, and the temperature control effect is better.

[0024] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the instructions and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric heating furnace for heating a flange, characterized in that: The invention comprises a furnace body (1), wherein a hot air channel inner diameter (2) is provided in the cavity of the furnace body (1), and a ceramic electric heating coil (3) is provided inside the hot air channel inner diameter (2), wherein the number of the ceramic electric heating coils (3) is 3 and they are distributed in a circular array with the center line of the hot air channel inner diameter (2) as the center; The ceramic electric heating coil (3) is externally connected to an outlet cable (4), and the outlet cable (4) extends outward to the outside of the furnace body (1); The furnace body (1) is connected to a drying chamber (5), and a temperature sensor (6) is provided in the cavity of the drying chamber (5); A hot air lower channel is provided on the lower side of the drying chamber (5), and a feed port (7) is provided on the upper side of the drying chamber (5); The tail end of the drying chamber (5) is provided with a discharge port (8) and a drying chamber observation port (9), and the height of the drying chamber observation port (9) is greater than the height of the discharge port (8).

2. The electric heating furnace for heating flange according to claim 1, characterized in that: A vent (10) is provided at the upper portion of the drying chamber (5).

3. The electric heating furnace for heating flange according to claim 1, characterized in that: A cross fixing bracket (11) is provided in the middle of the ceramic electric heating coil (3).

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