CN113939050A - Dehumidification method for electric heating tube - Google Patents
Dehumidification method for electric heating tube Download PDFInfo
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- CN113939050A CN113939050A CN202111193359.1A CN202111193359A CN113939050A CN 113939050 A CN113939050 A CN 113939050A CN 202111193359 A CN202111193359 A CN 202111193359A CN 113939050 A CN113939050 A CN 113939050A
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- electric heating
- power supply
- open contact
- control circuit
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/54—Heating elements having the shape of rods or tubes flexible
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Abstract
The invention discloses a dehumidification method of an electric heating tube, which comprises the following steps: a plurality of electric heating tubes are penetrated with electric heating wires inside and are added with insulating powder, and two ends of the electric heating tubes with two unsealed ends are correspondingly connected to a positive electrode output wire and a negative electrode output wire of the power supply control module; controlling the voltage of the positive and negative output ends of the power supply control module to be 30-50V, the heating power of each electric heating tube to be 1/15-1/10 of the output power of the electric heating tube, and controlling the electrifying time of the electric heating tube to be 5-7 min; adopt above-mentioned technical scheme, through circular telegram to the electrothermal tube both ends, can heat the heating wire in the electrothermal tube, when resistance wire self generates heat, make the moisture in the electrothermal tube discharge from inside to outside, it is very thorough to arrange the tide, compare with the heating by inside outside of tunnel furnace, oven except that the tide, this method is more power-saving, except that the tide more thoroughly, and processing cost reduces by a wide margin, can not take place the secondary phenomenon of getting damp simultaneously, guaranteed the quality of electrothermal tube, in addition, can not cause the emergence of electrothermal tube discolour or color spot, guarantee the life of electrothermal tube.
Description
Technical Field
The invention relates to the technical field of dehumidification, in particular to a dehumidification method of an electric heating tube.
Background
The electrothermal tube is called as a heating tube, and a tube-shaped electric heater element, wherein a coiled heating wire (resistance wire) is placed in a metal tube, insulating powder (MgO) with good heat resistance, heat conductivity and insulativity is filled around the heating wire and in a gap part, and two end parts of the heating wire are provided with leading-out bars or leading-out wires for connection. The novel heat exchanger has the characteristics of simple structure, high mechanical strength, high heat efficiency, safety, reliability, simplicity and convenience in installation, long service life and the like. The device is widely applicable to various saltpeter tanks, water tanks, oil tanks, acid-base tanks, fusible metal melting furnaces, air heating furnaces, drying boxes, hot pressing molds and other devices.
For die castings of magnesium oxide insulated electric heating tubes or stainless steel electric heating products subjected to brazing and polishing processing, in the production process, after a tube body penetrates through an electric heating wire and insulating powder is added, moisture removal needs to be carried out on the tube body, tube explosion and electric leakage are avoided, then tube openings at two ends of the tube body are sealed, so that the quality of the electric heating products is guaranteed, and the moisture removal process is very critical. The traditional method is that the electric heating product is put into a tunnel furnace and an oven for heating and drying, the temperature of the tunnel furnace and the oven is set to be slightly higher (generally the upper limit cannot exceed 120 ℃), the electric heating product can generate color change or color spots due to external high temperature, and the service life of the electric heating tube can be reduced; the temperature is slightly low and the moisture can not be removed thoroughly, the process is time-consuming to process, and the problem of moisture regain and electric leakage of electric appliance insulation can occur again after the product is delivered for a period of time.
Disclosure of Invention
In order to overcome the technical defects in the prior art, the invention aims to provide a dehumidification method of an electric heating tube to solve the technical problems.
The technical scheme adopted by the invention for solving the technical problem is as follows:
according to one aspect of the invention, a method for removing moisture of an electrothermal tube is designed, which comprises the following steps:
a plurality of electric heating tubes are penetrated with electric heating wires inside and are added with insulating powder, and two ends of the electric heating tubes with two unsealed ends are correspondingly connected to a positive electrode output wire and a negative electrode output wire of the power supply control module;
controlling the voltage of the positive and negative output ends of the power supply control module to be 30-50V, controlling the heating power of each electric heating tube to be 1/15-1/10 of the output power of the electric heating tube, and controlling the electrifying time of the electric heating tube to be 5-7 min.
Adopt above-mentioned technical scheme, through circular telegram to the electrothermal tube both ends, can heat the heating wire in the electrothermal tube, when resistance wire self generates heat, make the moisture in the electrothermal tube discharge from inside to outside, it is very thorough to arrange the tide, compare with the heating by inside outside of tunnel furnace, the oven removes the tide, this method is more power-saving, it is more thorough to remove the tide, and process cost reduces by a wide margin, the secondary phenomenon of getting damp can not take place simultaneously, the quality of electrothermal tube has been guaranteed, in addition, when the electrothermal tube heats, only be limited to the low pressure power supply because of the moist electric leakage, and the dry a kind of deep pot process temperature of low pressure can not be too high, can not cause the emergence of electrothermal tube discolour or color spot, guarantee the life of electrothermal tube.
In order to better solve the technical defects, the invention also has a better technical scheme that:
in some embodiments, the power supply control module includes a power supply terminal, a main control circuit and a control circuit, the main control circuit and the control circuit are both connected to the power supply terminal, and the control circuit is configured to control the power-on time and the power-off time of the main control circuit.
In some embodiments, the main control circuit comprises a voltage regulator and a first normally open contact, one end of the first normally open contact is connected with the positive electrode of the power supply end, the other end of the first normally open contact is connected with the positive electrode contact of the voltage regulator, the negative electrode contact of the voltage regulator is connected with the negative electrode of the power supply end, and two ends of an electric heating wire in the electric heating tube are correspondingly connected with a positive electrode output line and a negative electrode output line of the output end of the voltage regulator;
the control circuit comprises a contactor, a timer, a normally open button, a second normally open contact and a third normally open contact, one end of the normally open button is connected with the positive electrode of the power supply end, the other end of the normally open button is connected with the third normally open contact and the input end of the timer, the output end of the second normally open contact is connected with the input end of the contactor, the output ends of the contactor and the timer are both connected with the negative electrode of the power supply end, one end of the second normally open contact is connected with the input end of the normally open button, and the other end of the second normally open contact is connected with the output end of the normally open button;
the timer is used for controlling the third normally open contact to be closed in a timing mode, and the contactor is used for controlling the first normally open contact and the second normally open contact to be closed.
In some embodiments, a first adjustable resistor is connected to a positive output line of the voltage regulator output. Therefore, the heating power of the electric heating tube can be adjusted to meet the dehumidifying requirements of electric heating tubes with different specifications.
In some embodiments, a second adjustable resistor is connected to a lead connected between the first normally open contact and the positive electrode of the power supply terminal. Therefore, the voltage at two ends of the electric heating tube can be adjusted to meet the dehumidifying requirements of the electric heating tubes with different specifications.
In some embodiments, the control circuit further comprises an emergency stop button, one end of the emergency stop button is connected with the third normally open contact and the output end of the timer, and the other end of the emergency stop button is connected with the normally open button. Therefore, when an emergency occurs, the emergency stop button can be pressed to cut off power supply, and safe production is guaranteed.
In some embodiments, the control circuit further comprises a third resistor, a standby indicator lamp and a heating indicator lamp, wherein the third resistor is connected to a lead connected between the normally open button and the positive electrode of the power supply end, one end of the standby indicator lamp is connected with the output end of the normally open button, the other end of the standby indicator lamp is connected with the negative electrode of the power supply end, one end of the heating indicator lamp is connected with the emergency stop button, and the other end of the heating indicator lamp is connected with the negative electrode of the power supply end.
In some embodiments, the power supply terminal is connected with a master control switch.
In some embodiments, the voltage regulator is installed on a machine table, a control electrical box is arranged on the machine table, the control circuit is installed in the control electrical box, an insulating and heat-insulating plate is arranged at the top of the machine table, and a bracket for placing an electric heating tube is arranged above the insulating and heat-insulating plate.
Drawings
FIG. 1 is a schematic diagram of a circuit structure of a power supply control module in a method for removing moisture from an electrothermal tube according to an embodiment of the present invention;
reference numerals:
t, a voltage regulator; j1, contactor; j1.1, a first normally open contact; j1.2, a second normally open contact; SJ2, timer; SJ2.1 and a third normally open contact; SW and a master control switch; SW1, normally open button; (ii) a SW2, emergency stop button; d1, standby indicator light; d2, a heating indicator light; r1 and a first adjustable resistor; r2 and a second adjustable resistor; r3, third resistor; E. an electric heating tube.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
Referring to fig. 1, the method for removing damp from an electric heating tube provided by the present invention is applied to a power supply control module, the power supply control module includes a power supply terminal, a main control circuit and a control circuit, both the main control circuit and the control circuit are connected to the power supply terminal, and the control circuit is used for controlling the power-on time and the power-off of the main control circuit.
The main control circuit comprises a voltage regulator T and a first normally open contact J1.1, one end of the first normally open contact J1.1 is connected with the positive electrode of a power supply end, the other end of the first normally open contact J1.1 is connected with the positive electrode joint of the voltage regulator T, the power supply end is a power supply line, the power supply end is connected with a main control switch SW, the voltage regulator T is a single-phase alternating current voltage regulator T, the negative electrode joint of the voltage regulator T is connected with the negative electrode of the power supply end, and two ends of a heating wire in an electrothermal tube E are correspondingly connected with a positive electrode output line and a negative electrode output line of the output end of the voltage regulator T; the control circuit comprises a contactor J1, a timer SJ2, a normally open button SW1, a second normally open contact J1.2 and a third normally open contact SJ2.1, one end of the normally open button SW1 is connected with the positive electrode of the power supply end, the other end of the normally open button SW1 is connected with the input ends of the third normally open contact SJ2.1 and the timer SJ2, the output end of the second normally open contact J1.2 is connected with the input end of a contactor J1, the output ends of the contactor J1 and the timer SJ2 are both connected with the negative electrode of the power supply end, one end of the second normally open contact J1.2 is connected with the input end of the normally open button SW1, and the other end of the second normally open button SW1 is connected with the output end of the normally open button SW 1; the timer SJ2 is used for controlling the closure of the third normally open contact SJ2.1 at regular time, and the contactor J1 is used for controlling the closure of the first normally open contact J1.1 and the second normally open contact J1.2.
And a first adjustable resistor R1 is connected to the positive output line of the output end of the voltage regulator T. And a second adjustable resistor R2 is connected on a lead connected between the first normally open contact J1.1 and the anode of the power supply end.
The control circuit further comprises an emergency stop button SW2, a third resistor R3, a standby indicator lamp D1 and a heating indicator lamp D2, the emergency stop button SW2 is a normally closed button, one end of an emergency stop button SW2 is connected with the output ends of a third normally open contact SJ2.1 and a timer SJ2, the other end of the emergency stop button SW2 is connected with a normally open button SW1, the third resistor R3 is connected with a lead connected between a normally open button SW1 and the positive pole of a power supply end, one end of the standby indicator lamp D1 is connected with the output end of the normally open button SW1, the other end of the standby indicator lamp D2 is connected with the negative pole of the power supply end, one end of the heating indicator lamp D2 is connected with the emergency stop button SW2, and the other end of the heating indicator lamp D2 is connected with the negative pole of the power supply end.
In some embodiments, the voltage regulator is installed on the machine table, the control electrical box is arranged on the machine table, the control circuit is installed in the control electrical box, the insulating and heat insulating plate is arranged at the top of the machine table, and a bracket for placing the electric heating tube is arranged above the insulating and heat insulating plate.
The dehumidifying object is an electrothermal tube, which has a structure that an electric heating wire is penetrated into the electrothermal tube, and insulation powder is added into the electrothermal tube, and two ends of the electrothermal tube are not sealed.
The electric heating tube dehumidifying method comprises the following steps:
two ends of the electric heating wires of the electric heating tubes E are correspondingly connected in parallel with the positive and negative output wires of the output end of the voltage regulator T.
The resistance values of the first adjustable resistor R1 and the second adjustable resistor R2 are set according to the rated power of the electric heating tube E, the resistance values are used for regulating and controlling the voltage of the positive electrode output line and the negative electrode output line of the output end of the voltage regulator T to be 30-50V, and the heating power of the electric heating tube E is 1/15-1/10 of the output power of the electric heating tube E.
If the standby indicator lamp D1 is not lighted, the master control switch SW is closed (if the standby indicator lamp D1 is lighted, the surface master control switch SW is closed), and the timer SJ2 is set to control the closing time of the third normally-open contact SJ2.1 to be 5-7 min.
The normally open button SW1 is pressed, the control circuit is electrified, the contactor J1 is electrified at the moment, the first normally open contact J1.1 and the second normally open contact J1.2 are controlled to be closed, the main control circuit is electrified, and the electric heating tube can be heated.
When the timer SJ2 reaches the set time and controls the third normally open contact SJ2.1 to be disconnected, the control circuit is powered off, the first normally open contact J1.1 and the second normally open contact J1.2 are disconnected, the main control circuit is powered off, the electric heating tube stops heating, and the dehumidification of the electric heating tube is completed.
Referring to the table below, taking an electrical heating tube with a diameter of 10mm, a length of 200mm, a rated voltage of 220V, and a rated power of 2200W as an example, the temperature change condition of the electrical heating tube under different voltages, heating powers, and energizing times is the case of the electrical heating tube.
As can be seen from the table above, when the voltage is 50V and the heating power is 1/10 of the actual power, the temperature of the electric heating tube rises fastest, and the rapid dehumidification can be realized. In addition, through research on the weight change of the electric heating tube, when the voltage is 50V and the heating power is 1/10 of the actual power, the weight of the electric heating tube is gradually reduced from 0 to 6min, when the electric heating tube is electrified for 6min, the weight of the electric heating tube is not changed basically, when the voltage is 45V and the heating power is 1/12 of the actual power, the weight of the electric heating tube is also reduced gradually from 0 to 6min, when the electric heating tube is electrified for 6min, the weight of the electric heating tube is not changed basically, when the voltage is 40V and the heating power is 1/13 of the actual power, the weight of the electric heating tube is also reduced gradually from 0 to 7min, and when the electric heating tube is electrified for 7min, the weight of the electric heating tube is not changed basically. In addition, in other tests, although the voltage or the heating power of the electric heating tube is increased, the dehumidification efficiency can be improved more quickly, the discoloration or the color spots of the electric heating tube can be caused, the electric heating tube is easy to damage in actual use, and the service life of the electric heating tube is influenced, so that the voltage is 45V, the heating power is 1/12 of the actual power, when the power-on time is 6min, the quick dehumidification of the electric heating tube can be realized, the service life of the electric heating tube can be ensured not to be influenced, and meanwhile, the energy consumption is reduced.
The above description is only for the embodiments of the present invention, and it is obvious to those skilled in the art that various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (9)
1. A moisture removing method for an electric heating tube is characterized by comprising the following steps:
a plurality of electric heating tubes are penetrated with electric heating wires inside and are added with insulating powder, and two ends of the electric heating tubes with two unsealed ends are correspondingly connected to a positive electrode output wire and a negative electrode output wire of the power supply control module;
controlling the voltage of the positive and negative output ends of the power supply control module to be 30-50V, controlling the heating power of each electric heating tube to be 1/15-1/10 of the output power of the electric heating tube, and controlling the electrifying time of the electric heating tube to be 5-7 min.
2. The method of claim 1, wherein the power supply control module comprises a power supply terminal, a main control circuit and a control circuit, the main control circuit and the control circuit are connected to the power supply terminal, and the control circuit is used for controlling the power-on time and the power-off time of the main control circuit.
3. The method of claim 2, wherein the main control circuit comprises a voltage regulator and a first normally open contact, one end of the first normally open contact is connected to the positive terminal of the power supply terminal, the other end of the first normally open contact is connected to the positive terminal of the voltage regulator, the negative terminal of the voltage regulator is connected to the negative terminal of the power supply terminal, and two ends of the heating wire in the electric heating tube are correspondingly connected to the positive and negative output wires of the output terminal of the voltage regulator;
the control circuit comprises a contactor, a timer, a normally open button, a second normally open contact and a third normally open contact, one end of the normally open button is connected with the positive electrode of the power supply end, the other end of the normally open button is connected with the third normally open contact and the input end of the timer, the output end of the second normally open contact is connected with the input end of the contactor, the output ends of the contactor and the timer are both connected with the negative electrode of the power supply end, one end of the second normally open contact is connected with the input end of the normally open button, and the other end of the second normally open contact is connected with the output end of the normally open button;
the timer is used for controlling the third normally open contact to be closed in a timing mode, and the contactor is used for controlling the first normally open contact and the second normally open contact to be closed.
4. The method of claim 3, wherein the positive output line of the output terminal of the voltage regulator is connected to a first adjustable resistor.
5. The method of claim 3 or 4, wherein a second adjustable resistor is connected to a lead connected between the first normally open contact and the positive terminal of the power supply terminal.
6. The method of claim 5, wherein the control circuit further comprises an emergency stop button, one end of the emergency stop button is connected to the third normally open contact and the output end of the timer, and the other end of the emergency stop button is connected to the normally open button.
7. The method of claim 6, wherein the control circuit further comprises a third resistor, a standby indicator light and a heating indicator light, the third resistor is connected to a wire connected between the normally open button and the positive terminal of the power supply terminal, one end of the standby indicator light is connected to the output terminal of the normally open button, the other end of the standby indicator light is connected to the negative terminal of the power supply terminal, one end of the heating indicator light is connected to the emergency stop button, and the other end of the heating indicator light is connected to the negative terminal of the power supply terminal.
8. The method of claim 2, wherein the power supply terminal is connected to a master control switch.
9. The method of claim 7, wherein the voltage regulator is mounted on a machine, the machine is provided with a control box, the control circuit is mounted in the control box, the top of the machine is provided with an insulated board, and a bracket for placing the electrical heating tube is disposed above the insulated board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111193359.1A CN113939050A (en) | 2021-10-13 | 2021-10-13 | Dehumidification method for electric heating tube |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111193359.1A CN113939050A (en) | 2021-10-13 | 2021-10-13 | Dehumidification method for electric heating tube |
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| CN113939050A true CN113939050A (en) | 2022-01-14 |
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| CN202111193359.1A Pending CN113939050A (en) | 2021-10-13 | 2021-10-13 | Dehumidification method for electric heating tube |
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Citations (9)
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|---|---|---|---|---|
| GB8917880D0 (en) * | 1988-10-19 | 1989-09-20 | Dunne Michael P | Heat tracing tubular heater |
| CN101466177A (en) * | 2008-12-03 | 2009-06-24 | 江山热威金属制造有限公司 | Moisture proofing method for electric heating tube oxidation magnesite powder |
| US20100307120A1 (en) * | 2009-06-05 | 2010-12-09 | Stover Jimmy R | Harvester with heated duct |
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| CN104812110A (en) * | 2015-05-07 | 2015-07-29 | 华能无锡电热器材有限公司 | Moistureproof insulating electric heater and manufacturing method thereof |
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| CN108200673A (en) * | 2018-01-24 | 2018-06-22 | 江苏裕兴电器有限公司 | A kind of high pressure resistant electric heater of low temperature and its manufacturing method |
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-
2021
- 2021-10-13 CN CN202111193359.1A patent/CN113939050A/en active Pending
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| GB8917880D0 (en) * | 1988-10-19 | 1989-09-20 | Dunne Michael P | Heat tracing tubular heater |
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