KR200199770Y1 - Welding device of polyethlylene pipe using electronic heating sheet - Google Patents

Abstract

The present invention relates to a fusion machine of a polyethylene pipe using an electric heating sheet, and in particular, the fusion machine receives a voltage transformer for transforming the power supplied from the outside into a predetermined voltage, and receives the power output from the voltage transformer. The power control unit for controlling the strength of the power required for the joining of the pipe, the sensing unit for sensing the power controlled by the power control unit, and the intensity of the power measured by the sensing unit is compared with the set reference, if the difference occurs It is equipped with a power supply circuit including an overload control unit for controlling the operation to keep the power supplied to the heat generating section of the heat generating sheet stable, and to save the status and results of the fusion process as an internal data in the internal memory and to the built-in printer By outputting, the objective reliability of the welding operation can be improved.

Description

Welding device of polyethlylene pipe using electronic heating sheet

The present invention relates to a fusion machine for welding a polyethylene pipe (polyethlylene pipe), in particular a technology for fusion welding the outer surface of the pipe abutting each other using an electric heat generating sheet having an electric heating unit such as heating wire.

In general, polyethylene pipes are used for various purposes because they have no advantage of being corroded and have the advantages of being semi-permanent and low in material and construction costs unless they are artificially damaged. In addition, because of its flexibility, it is easy to pipe on any terrain, and there is no substance dissolving in the pipe itself, so it is mainly used for water pipes, gas pipes, sewer pipes, etc. Wide range of applications However, in order to safely transport and store gas, chemicals and environmental pollutants, which are high-risk materials when installing pipes, the joints of pipes must be firmly joined.

For this purpose, the joining of polyethylene pipes is performed by directly fusion of the plastic itself with heat without using other materials to join the pipes, which is called welding. Such fusion methods include bart fusion, E / F (E / F) fusion, heat shrink sheet fusion, and the like, and various types of welding are selected and carried out by selecting a bonding method capable of performing stable work according to site conditions.

On the other hand, the fusion method using the sheet heats the heat generating part (for example, a heating wire) in the sheet by supplying a voltage or current required according to the type of the heat generating sheet by using a microprocessor (CPU) and a power electronic device complex. Thus, the outer surface of the pipe and the inner surface of the heat generating sheet are melted to fuse the polyethylene pipes in contact with each other. In this case, the microprocessor inside the fusion machine controls the heating of the heat generating unit by the current or the voltage of the temperature that can fusion polyethylene pipe, according to the size of the polyethylene pipe, the welding parameters such as the heating temperature and time of the heat generating unit accurately In addition to the adjustment, the power supplied to the sheet must be generated stably. If not, a defect occurs in pipe connection.

However, the conventional fusion splicer using the electric heating sheet supplies voltage and current required by the sheet in a constant voltage or constant current manner through separate circuits and separate circuits, and therefore, separate devices are required for welding. When sudden changes in the power supply due to supply or overload cannot be detected and controlled immediately, each current or voltage supply circuit to generate the required current or voltage according to the method of the heat generating sheet during welding operation. There had to be a problem. In addition, there has been a limitation in providing objective data to prove that the results of the process have been normally performed in the polyethylene pipe fusion machine using the heat generating sheet.

An object of the present invention is to transform the power supplied from the outside in order to solve the problems of the prior art as described above, to supply the power required according to the method of the electric heating sheet and to prevent overheating in the heat generating portion of the electric heating sheet The present invention provides a fusion machine for polyethylene pipe using an electric heat generating sheet capable of protecting a circuit from external source fluctuations or overload by having a power supply circuit for controlling a supply amount.

Another object of the present invention is to provide a welding machine for polyethylene pipe using an electric heating sheet which can improve the objective reliability of the welding operation by storing the fusion progress and the results as data and outputting them to the printer in the welding machine using the heat generating sheet. .

1 is a view showing a fusion machine of a polyethylene pipe using an electric heating sheet according to the present invention,

2 is a functional block diagram of a fusion machine including a power supply circuit for supplying stable power according to the present invention.

Explanation of symbols on the main parts of the drawings

1: fusion machine 11: selection key input unit

12: power switch 13: modem

14: Display window 15: Memory

16: Built-in printer 17: Temperature sensor

18: microprocessor 20: power supply circuit

21: power supply 22: voltage transformer

23: power control unit 24: detection unit

25: overload control unit 30: polyethylene pipe

32: outer surface of the joint of the pipe 40: heat generating sheet

50: external computer

In order to achieve the above object, the present invention is a welding machine for melting the outer surface of the polyethylene pipes which are in contact with each other by using the heat generating sheet with the heat generating unit, and welding the pipes. It is connected to a remote computer to transmit the welding operation data and monitor the welding operation, a key input unit, a display window for displaying the welding operation setting, the welding operation process and the result, a built-in printer which outputs the welding operation result data, A modem, a memory for storing the fusion parameters and the result data of the fusion sheet for the heat generating sheet, the power supplied from the outside, and transforming the power supply to supply the required power according to the heat generating sheet; Optional power supply circuit that controls the power supply to prevent overheating It operates a power supply circuit according to the operation command of the input unit to control the power supply to the heat generating sheet, and characterized in that it comprises a microprocessor for controlling the fusion process and operation results to be stored in the memory or to display on the display window and the built-in printer .

According to the present invention, the power supply circuit can be stably supplied power required by the heat generating sheet to protect the circuit from external power fluctuations or overload, and the result of the fusion operation is stored as data in the memory and built-in printer By outputting to, we can provide objective data of fusion.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view schematically showing a welding machine of a polyethylene pipe using an electric heating sheet according to the present invention.

As shown in FIG. 1, the fusion machine 1 of the present invention includes a selection key input unit 11 for inputting a setting of a welding operation environment and a welding operation command, and a display window for displaying the welding operation setting, the welding operation process, and the result thereof. 14, a built-in printer 16 for outputting the result data of the fusion operation, a modem 13 connected with a remote computer 50 to transmit the fusion operation data and monitor the welding operation process, and an electric heat generating sheet A memory 15 for storing the fusion parameters and the fusion operation data relating to the 40 and a power supply 21 supplied from the outside and transforming the power supply 21 and using a sheet of a voltage control scheme according to the electric heating sheet 40. In the case of supplying a voltage, and in the case of using a sheet of the current control method, the power supply circuit 20 for supplying the current and controlling the power supply amount to prevent overheating of the heat generating portion of the electric heat generating sheet 40, and a selection key Input section 11 The power supply circuit 20 is operated in accordance with an operation command to control the power supply according to the method of the electric heating sheet 40, and the fusion process and the operation results are stored in the memory 15 or the display window 14 and the built-in printer ( A microprocessor 18, which controls the display to 16).

The fusion machine 1 of the polyethylene pipe using the electric heating sheet of the present invention further includes a temperature sensor 17 for sensing the temperature around the fusion machine. Then, the microprocessor 18 controls the operation of the power supply circuit 20 by automatically changing the welding parameter to reduce the heat loss of the heat generating sheet 40 according to the temperature detected by the temperature sensor 17. do.

Meanwhile, reference numeral 12, which is not described, is a power switch for applying power to the system or an emergency switch for stopping the operation when an error occurs in the welding process, and 19 is a connection line between the electric heating sheet 40 and the fusion machine 1. Will be.

The fusion machine of the polyethylene pipe using the heat generating sheet according to the present invention configured as described above is operated as follows.

First, the operator finds the electric heating sheet 40 corresponding to the polyethylene pipe diameter and thickness to be joined to wrap both outer surfaces 32 of the polyethylene pipe. Then, input voltage, output current, ambient temperature, pipe size, weight, and fusion pipe tooth to the select key input unit 11. In order to heat the heating wire which is the electric heat generating unit in the electric heat generating sheet 40 of the current object in the fusion work environment preset according to the number.

Then, the microprocessor 18 of the fusion machine sets the heating temperature and the fusion time according to the fusion parameters stored in its own memory 15 to supply stable power required by the heat generating sheet 40 through the power supply circuit 20. do. Thus, the heat generating portion of the heat generating sheet 40 is heated to melt both sides of the polyethylene pipe and the inner surface of the heat generating sheet 40.

Then, when a predetermined fusion time has elapsed, the power supply circuit 20 stops operating and no longer applies power to the heat generating portion of the heat generating sheet 40. The heat-generating sheet 40 wrapped around the polyethylene pipe 30 is left intact for a predetermined cooling time to bond both ends of the molten pipe.

2 is a block diagram of a power supply circuit inside the fusion machine according to the present invention.

Referring to this, the improved power supply circuit 20 of the present invention inputs a voltage transformer 22 for transforming the power 21 supplied from the outside into a predetermined voltage, and a power output from the voltage transformer 22. Power control unit 23 for controlling the intensity of power for receiving and supplying to the heat generating sheet 40, a sensing unit 24 for sensing the intensity of power controlled by the power control unit 23, and the sensing unit 24. The overload control unit 25 is configured to control the operation of the power control unit 23 when the difference occurs by comparing the intensity of the electric power measured by the set reference.

The power supply circuit of the present invention configured as described above, for example, It works as follows in the fusion machine for electric heating sheet with specifications.

Input voltage AC 190 ~ 250V Output current 5A to 60A Output voltage 10 V to 170 V Ambient temperature 0 ℃ -40 ℃ size 250 (L) × 305 (W) × 360 (H) weight 50 kg Fusion range 200 mm to 1200 mm

Referring to Table 1, since the power supply circuit 20 of the present invention has an input voltage of 190 to 250V, the control voltage outputted when using the sheet of the voltage control method during welding is required within a range of 10V to 170V. For example, AC 80V). In addition, when using the sheet of the current control method during welding, the control current output generates a required current (for example, 18 A) within the range of 5A to 60A.

In more detail, the operation of the power supply circuit 20 is as follows. First, the voltage is changed by reducing or boosting the voltage to a constant voltage in order to secure a power supply suitable for melting the pipe to which the power supply 21 supplied from the outside is joined through the voltage transformer 22. The power decompressed or boosted by the voltage transformer 22 is input to the power controller 23 to generate a voltage or current required according to the method of the electric heating sheet 30.

Then, the sensing unit 24 receives the power generated through the power control unit 23 to detect the strength of the power applied to the heat generating sheet 40. Thus, when a difference occurs when the intensity of the electric power measured by the sensing unit 24 is set, the overheating control unit 25 is operated to control the operation of the power control unit 23 by heating the electric heating sheet 40 when the polyethylene pipe is fused. Maintain stable power supply.

In addition, the power supply circuit 20 is heat that is lost to the heat generating sheet 40 when the microprocessor 18 that senses the temperature around the fusion splicer 1 through the temperature sensor 17 is high or low in the workplace. In order to compensate for this, during the automatic operation, the operation of the power control unit 23 is controlled according to the automatically changed fusion parameters. That is, the fusion operation is performed by changing the energization time of the power supplied to the sheet 40.

Table 2 below shows the voltage of the voltage control method and the current size of the current control method according to the sheet type when the polyethylene double pipe of the general double wall is fused.

Referring to Table 2, the fusion machine of the polyethylene pipe using the electric heating sheet of the present invention is provided with a power supply circuit 20 to supply a voltage or current to the heating wire which is the electric heating unit of the electric heating sheet 40 for fusion welding pipes According to the type of sheet, it is divided into a voltage control method and a current control method to supply a stable voltage or current to the sheet. For example, in the case of an electric heating sheet surrounding a 300 mm polyethylene pipe, a current value required to heat the heat generating portion of the sheet by a current control method is 18 A, and at this time, the energization time for supplying a stable current through the power supply circuit 20 is It lasts for 780 seconds. Alternatively, in the case of an electric heating sheet covering a polyethylene pipe of 700 to 1000 mm, a voltage value required to heat the heat generating part of the sheet by a voltage control method is 140 V, and at this time, an energization time for supplying a stable voltage through the power supply circuit 20 is 1520. Seconds.

Diameter (mm) Voltage controlled seat Current controlled seat Control voltage (V) Current duration (seconds) Control current (A) Current duration (seconds) 200 80 310 18 780 250 85 350 18 780 300 80 350 18 780 350 80 510 18 780 400 80 660 18 780 450 110 1050 30 940 500 110 1260 30 940 600 110 1760 30 940 700 140 1430 30 940 800 140 1820 41 940 900 140 1520 41 940 1000 140 1830 41 940 1200 150 2340 41 940 1500 150 3550 - -

Therefore, the present invention divides the electricity supplied to the heat generating portion of the heat generating sheet 40 in the welding operation into a voltage control method and a current control method, and measures the ambient temperature of the workplace to compensate for the heat lost by heat radiation of the work sheet. Automatically adjust the energization time (or manually input by the operator) to stably generate voltage (or current) and heat the heat-generating part of the heat-generating sheet to the temperature where the polyethylene pipe can be fused. .

As described above, the present invention detects a sudden change in the power supply due to a sudden interruption and abnormal supply of an external power supply or an overload through a power supply circuit stably supplying power for heating the heat generating portion of the electric heating sheet. By controlling the power supply immediately, the failure rate of the welding operation can be reduced.

In addition, the present invention can not only provide the data of the welding operation to the operator by outputting through the display window and the built-in printer during the welding operation of the polyethylene pipe using the heat generating sheet, but also stores the data in its own internal memory for later welding operation. It can also be used to control or print fusion to an external computer via a modem.

On the other hand, the present invention is not limited to the above-described embodiment, various modifications are possible by those skilled in the art within the spirit and scope of the present invention described in the claims to be described later.

Claims (3)

In the welding machine for melting the outer surface of the polyethylene pipes which are in contact with each other by using the heat generating sheet with the heat generating unit, A selection key input unit for inputting a setting of a welding operation environment and a welding operation command; A display window for displaying the welding operation setting, the welding operation process, and the result; A built-in printer for outputting result data of the fusion operation; A modem coupled with a remote computer to transmit the fusion work data and monitor the fusion work process; A memory for storing fusion parameters and result data of a fusion operation for said electrothermal sheet; A power supply circuit for transforming power supplied from the outside, supplying power required according to the method of the electric heating sheet, and controlling a power supply amount to prevent overheating of the electric heating portion of the electric heating sheet; And A microcomputer controlling the power supply circuit to supply power to the heat generating sheet according to an operation command of the selection key input unit, and to control the fusion process and operation results to be stored in the memory or to be displayed on the display window and the built-in printer. A welding machine for polyethylene pipes using an electric heating sheet, comprising a processor. The apparatus of claim 1, wherein the power supply circuit comprises: a voltage transformer configured to transform power supplied from the outside into a constant value; A power control unit which receives the power output from the voltage transformer and controls the strength of power for supplying the heat generating sheet; A detector configured to detect an intensity of power controlled by the power controller; And And an overload control unit for controlling the operation of the power control unit when the difference occurs by comparing the intensity of the electric power measured by the sensing unit with a set reference. The method of claim 1, further comprising a temperature sensor for sensing the temperature around the fusion machine, the microprocessor automatically changes the fusion parameters to reduce the heat loss of the heat generating sheet in accordance with the temperature detected by the temperature sensor Fusion pipe of the polyethylene pipe using the electric heating sheet, characterized in that for controlling the operation of the power supply circuit.