CN205580097U - Brushless resistance heating's steel band drying -machine - Google Patents

Abstract

The utility model provides a steel belt dryer without electric brush resistance heating, which includes a frame, on which a coil, a steel belt winding mechanism and a frequency converter are arranged, the steel belt is wound on the steel belt winding mechanism, and the steel belt is returned It passes through the coil and has no contact with the coil; the coil is connected to the frequency converter, the frequency converter inputs alternating current into the coil, and the frequency converter is connected to the controller. The utility model adopts unique brushless resistance heating to heat the steel strip, without preheating in advance, and can be turned on at any time, with low energy consumption and high equipment utilization rate; the non-contact speed measuring sensor is used to detect the running speed of the steel strip, and according to the mathematical model With closed-loop control, the heating of the steel strip matches the running speed to ensure that the steel strip can be completely dried; the equipment is small in size and easy to install; the equipment has an independent control system, and can also be operated online with the front and rear process equipment, and the operation is simple.

Description

A steel belt dryer with brushless resistance heating

technical field

The utility model belongs to the technical field of heating and drying of steel strips, in particular to a steel strip drying machine without electric brush resistance heating.

Background technique

During the production process of flux-cored welding wire, there are oil and many impurities on the surface of the raw material steel strip. In order to ensure the quality of the final product, the steel strip must be cleaned before use, and the steel strip is immediately faced with the problem of drying after cleaning. The core of steel strip drying is that the steel strip itself must be heated to a certain temperature so that the moisture on the surface evaporates quickly, otherwise the surface cannot be dried. Therefore, the drying process requires that the steel strip be heated quickly, uniformly and thoroughly, energy-saving, and The strip itself cannot be negatively affected. The traditional drying method is to use an ordinary electric heating tube to dry. The electric heating tube first heats the air, and then uses the heat conduction of the air to heat the steel strip. The heat conduction efficiency is very low and the drying speed is slow, and a large part of the heat is lost to the waste in the air. In addition, this drying method can only control the air temperature in the drying box. With the different speed of the steel strip, the temperature of the steel strip itself will change greatly (when the speed of the steel strip is low, the temperature of the steel strip in the drying box If the time of staying in the medium is longer, the temperature of the steel strip will be higher; when the speed of the steel strip is higher, the temperature of the steel strip will be low and the drying will not be sufficient), resulting in unstable product quality and a large footprint.

Contents of the invention

The technical problem to be solved by the utility model is that the heat conduction efficiency of the traditional drying method is very low and the drying speed is slow, a large part of the heat is lost to the air to cause waste, and the change of the speed of the steel strip will affect the drying temperature of the steel strip , has a great impact on product quality, in order to solve the above problems, the utility model provides a steel belt dryer with brushless resistance heating.

The purpose of this utility model is achieved in the following manner:

A steel belt dryer with brushless resistance heating, including a frame, a coil, a steel belt winding mechanism and a frequency converter are arranged on the frame, the steel belt is wound on the steel belt winding mechanism, and the steel belt passes through the coil, And there is no contact with the coil; the coil is connected to the frequency converter, the frequency converter inputs alternating current into the coil, and the frequency converter is connected to the controller.

The steel belt winding mechanism includes an upper wire wheel and a lower wire wheel, the upper wire wheel and the lower wire wheel can rotate freely, the upper wire wheel is provided with two grooves, and the lower wire wheel is provided with a groove, The steel belt first goes around a groove on the upper wire wheel, then around the groove on the lower wire wheel, and finally winds out through another groove on the upper wire wheel.

The frame is provided with a thermocouple, the temperature measuring probe of the thermocouple is not in contact with the surface of the steel strip, and the transmission end of the thermocouple is connected with the controller.

The frame is also provided with a speed sensor, the speed sensor is connected with the controller, the steel belt passes through the speed measuring wire wheel, and the speed measuring wire passing wheel is provided with a code disc, and the speed sensor and the code disc are non-contact sensing.

Compared with the prior art, the utility model provides a kind of steel strip passing through the induced current, using the resistance of the steel strip itself to generate heat when passing the current, so that the water on the surface of the steel strip itself rises to a certain temperature and evaporates, so as to achieve the drying effect. Purpose. The steel belt forms a loop around the upper wire wheel and the lower wire wheel, and passes through a energized coil to generate an induced current. Because the resistance of the steel belt itself generates Joule heat when the current passes, the temperature of the steel belt rises. Finally, the purpose of drying the steel strip is achieved. The frequency converter is used to provide power, the operating frequency of the coil is increased, the magnetic efficiency is greatly improved, and a good drying effect can be obtained with only a small amount of energy consumption. The running line speed is detected in real time, the heating current is precisely controlled by the controller, and the closed-loop control is realized through thermocouple feedback, which can keep the temperature of the steel strip constant at any speed, ensuring the drying effect without overheating the steel strip.

The beneficial effects of the utility model:

1. The equipment adopts unique brushless resistance heating to heat the steel strip, no need to preheat in advance, and can be turned on at any time, with low energy consumption and high equipment utilization.

2. Obvious energy-saving effect: the induction coil heating method reduces energy consumption by 80% compared with the ordinary electric heating tube heating method.

3. The equipment is small in size and easy to install; the equipment has an independent control system, and can also be operated online with the equipment in the front and rear processes, and the operation is simple.

4. The non-contact speed sensor is used to detect the running speed of the steel belt, and the closed-loop control is carried out according to the mathematical model. The heating of the steel belt matches the running speed to ensure that the steel belt can be completely dried.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a top view of the utility model.

Fig. 3 is a schematic diagram of the lower wire passing wheel of the present invention.

Among them, 1 is a coil; 2 is an upper wire wheel; 3 is a lower wire wheel; 4 is a frequency converter; 5 is a steel belt; 6 is a frame; 7 is a thermocouple;

detailed description

As shown in accompanying drawings 1-3, a steel belt dryer with brushless resistance heating includes a frame 6 on which a coil 1, a steel belt winding mechanism and a frequency converter 4 are arranged, and a steel belt 5 is wound On the steel belt winding mechanism, the steel belt 5 also passes through the coil 1 and has no contact with the coil 1; the coil 1 is connected to the frequency converter 4, the frequency converter 4 inputs alternating current into the coil 1, and the frequency converter 4 is connected to the controller .

The steel belt winding mechanism includes an upper thread wheel 2 and a lower thread wheel 3, the upper thread wheel 2 and the lower thread wheel 3 can rotate freely, the upper thread wheel 2 is provided with two grooves, and the lower thread wheel 3 is provided with a groove, steel belt 5 goes around a groove on the wire wheel 2 earlier, then walks around the groove on the wire wheel 3, and finally goes out through another groove on the wire wheel 2.

The frame 6 is provided with a thermocouple 7, the temperature measuring probe of the thermocouple 7 is not in contact with the surface of the steel strip 5, and the transmission end of the thermocouple 7 is connected to the controller.

Described frame 6 is also provided with speed sensor 9, and speed sensor 9 is connected with controller, and steel strip 5 passes through the speed measuring wire wheel, and speed measuring wire passing wheel is provided with code disc 8, and speed sensor 9 and code disc 8 are mutually connected. touch sensitive.

The speed sensor 9 feeds back the steel strip line speed pulse information to the controller, and the controller accurately controls the output heating current of the frequency converter 4 according to the temperature detected by the thermocouple 7 and the steel strip line speed, so that the steel strip 5 can be heated at different line speeds. Keep heating temperature constant.

The frame of the steel belt dryer is provided with shutters for discharging water vapor.

The working process of the utility model is as follows: during work, the frequency converter 4 inputs an alternating current into the coil 1 to generate an alternating magnetic field, and the steel strip 5 passing through the coil 1 is also a coil, and an induced current is generated in the steel strip 5, and the steel strip 5 Joule heat is generated under the action of its own resistance. The coil 1 is supplied with power by the frequency converter 4, the operating frequency of the coil 1 is increased, the magnetic efficiency is greatly improved, and a good drying effect can be obtained with only a small energy consumption. The steel belt 5 passes through the speed measuring wheel, the code disc 8 is set on the speed measuring wheel, the sensor 9 is fixed on the frame and is inductively connected with the code disc 8, and can detect the pulse signal of the code disc 8, and the sensor 9 will detect the pulse signal The signal is fed back to the controller, and the controller accurately controls the heating current according to the temperature detected by the thermocouple 7 and the running speed of the steel strip, which can keep the heating temperature of the steel strip constant at any speed, ensuring the drying effect without causing the steel strip to Bring overheating.

Compared with the prior art, the utility model provides a kind of steel strip passing through the induced current, using the resistance of the steel strip itself to generate heat when passing the current, so that the water on the surface of the steel strip itself rises to a certain temperature and evaporates, so as to achieve the drying effect. Purpose. The steel belt forms a loop around the upper wire wheel and the lower wire wheel, and passes through a energized coil to generate an induced current. Because the resistance of the steel belt itself generates Joule heat when the current passes, the temperature of the steel belt rises. Finally, the purpose of drying the steel strip is achieved. The frequency converter is used to provide power, the operating frequency of the coil is increased, the magnetic efficiency is greatly improved, and a good drying effect can be obtained with only a small amount of energy consumption. The running line speed is detected in real time, the heating current is precisely controlled by the controller, and the closed-loop control is realized through the feedback of the thermocouple, which can keep the temperature of the steel strip constant at any speed, ensuring the drying effect without overheating the steel strip.

The beneficial effects of the utility model:

1. The equipment adopts unique brushless resistance heating to heat the steel strip, no need to preheat in advance, and can be turned on at any time, with low energy consumption and high equipment utilization.

2. Obvious energy-saving effect: the induction coil heating method reduces energy consumption by 80% compared with the ordinary electric heating tube heating method.

3. The equipment is small in size and easy to install; the equipment has an independent control system, and can also be operated online with the equipment in the front and rear processes, and the operation is simple.

4. The non-contact speed sensor is used to detect the running speed of the steel belt, and the closed-loop control is carried out according to the mathematical model. The heating of the steel belt matches the running speed to ensure that the steel belt can be completely dried.

The above is only the preferred embodiment of the utility model, it should be pointed out that for those skilled in the art, without departing from the overall concept of the utility model, some changes and improvements can also be made, and these should also be regarded as Protection scope of the present utility model.

Claims (4)

1. A steel belt dryer with brushless resistance heating, characterized in that it includes a frame (6), on which a coil (1), a steel belt winding mechanism and a frequency converter (4) are arranged , the steel strip (5) is wound on the steel strip winding mechanism, the steel strip (5) also passes through the coil (1), and has no contact with the coil (1); the coil (1) is connected with the frequency converter (4), and the frequency converter (4) Input an alternating current into the coil (1), and connect the frequency converter (4) to the controller. 2. The steel strip dryer with brushless resistance heating according to claim 1, characterized in that: the steel strip winding mechanism includes an upper thread wheel (2) and a lower thread wheel (3), and the upper thread wheel (3) The wire wheel (2) and the lower wire wheel (3) can rotate freely. The upper wire wheel (2) is provided with two grooves, and the lower wire wheel (3) is provided with one groove. The steel belt (5) is wound first. Cross a groove on the wire wheel (2), walk around the groove on the wire wheel (3), and finally go out through another groove on the wire wheel (2). 3. The brushless resistance heating steel belt dryer according to claim 1, characterized in that: the frame (6) is provided with a thermocouple (7) and a temperature measuring probe of the thermocouple (7) It is not in contact with the surface of the steel strip (5), and the transmission end of the thermocouple (7) is connected to the controller. 4. The brushless resistance heating steel belt dryer according to claim 1, characterized in that: the frame (6) is also provided with a speed sensor (9), the speed sensor (9) and the controller connected, the steel belt (5) passes through the speed measuring wire wheel, on which the speed measuring wire wheel is provided with a code disc (8), and the speed sensor (9) and the code disc (8) are non-contact sensing.