KR19980038026A - Dual insulation tube construction and management system and its leak detection device - Google Patents

Abstract

The present invention relates to a construction and management system of a double heat insulation tube and a leak detection device used therefor, which enables the early detection and repair of abnormal phenomena occurring during the construction and operation of the double heat insulation tube. Anomalies that may occur during the construction and operation of wet management and double insulation pipes can be quickly and accurately identified and repaired early, improving the efficiency of the system and preventing economic losses and environmental pollution.

Description

Dual insulation tube construction and management system and its leak detection device

1 is a view showing the structure of a double heat insulation tube to which the present invention is applied. FIG. 7 is a block diagram showing in detail the signal compensation device shown in FIG.

10,20: sensor wire 12,22: return wire

64: second transformer 66: small signal amplifier stage

68: output signal amplifier stage 70: IC chip

72: FSK communication unit

The present invention relates to a construction and management system of a double thermal insulation tube, and in particular, a construction and management system of a dual thermal insulation tube to enable early detection and repair of abnormalities occurring during construction and operation of a dual insulation tube and its use. If it is repaired after the surrounding work is completed, it is extremely difficult to identify the location of the defect, so the location must be found and repaired immediately after the occurrence of the defect. In addition, in the initial construction, the double insulation tube can be inspected as many times a day as the construction amount is small, but as the construction volume increases, the number of inspections decreases. As a result of the accumulation of such abnormalities, the completion of the construction will result in more difficult repairs. The construction of the double insulation tube can be used as a construction system during construction and as a management operation system after construction. A construction and management system is provided. A display means for displaying a certain amount of stored data is provided. In addition, the leak detection device of the double heat insulation tube construction system according to the present invention is connected to the microcomputer and the push switch for transmitting an external input from the user to the microcomputer, a portable computer for documenting the data of the construction system and And a communication and alarm unit for connecting to the microcomputer and the portable computer for exchanging data with the portable computer and for displaying a display when an abnormal phenomenon occurs. A soft start power source is further provided for achieving the display. Display means, a push switch connected to the microcomputer to transmit external input from a user to the microcomputer, and a push-pull amplifier to augment communication output. To communicate with each other Means, connected to the communication means of preventing rush current and provided with soft-start jeonwonreul for making an initial stabilization of the power supply for leak detection apparatus; A power supply device for supplying power to the leak detection device; A central monitoring device for exchanging data with the leak detecting device and managing the data; And a signal compensation device for amplifying a signal communicated between the leak detection device and the central monitoring device. The sensor wire 10 has a constant resistance value and has a structure in which a groove is formed in the sheath of the wire, whereas the return wire 12 has a structure in which a bare wire of the wire is covered with a sheath of a complete insulator.

On the other hand, Figure 2 illustrates the structure of the sensing cable to which the present invention is used to detect the wetness of the laboratory, warehouse, etc. that do not have the structure of the double insulation tube, or leaks of water pipes, oil pipes, etc. (A) Cross-sectional view of the cable and (B) shows the shape of the sensor wire and the return wire embedded in the cable. As shown in FIG. 2, the sensing cable fills three leads, i.e. the sensor wire 20, the return wire 22 and the lead 24, with a moisture absorbing insulator 28, e. The insulator shell of the columnar shape is surrounded by a stranded shield 26 and has a constant length. The sensor wire 20 has a constant resistance value and a groove of a certain interval is formed in the coating of the wire, while the return wire 22 has a structure in which a bare wire of the wire is coated with a complete insulator. The conductive wire 24 is covered with a soft-coated bare copper wire with a moisture absorbing insulator 28, for example, a face coating material. A buffer 36 for storing and the first and second negative feedback amplifiers 32 and 34 And a multiplexer 38 for selecting signals from the buffer 36, and an analog-to-digital converter (A / D) 40 for converting the analog output signal from the multiplexer into a digital signal. The leak detection device also includes a microcomputer 42 having a RAM for controlling the entire system and storing a certain amount of data, and an IC chip interfaced to control the operation of the switches and to monitor the state of the computer. 44, a switch driver 46 for driving switches, a push switch 50 for external input from a user, a portable computer 54 for documenting construction system data, and a portable computer 54 Communication and alarm unit 52 for exchanging data with each other and displaying when anomalies occur, and a battery 56 for supplying power to the system. At the input terminal of the amplifier AMP2 34, the switch SW4 is connected to one end of the pipe. (B) and the output terminal of the second negative amplifier AMP2 34, respectively. The switch SW5 is connected between the reference voltage source Vref and one end A of the sensor wire 10 and the switch SW6 is connected between one end B of the return wire 12 and the ground potential.

In the construction of the double insulation tube, the leak detection apparatus according to the present invention as shown in FIG. 3 continuously detects the state of the double insulation tube using the battery 56, and stores the data obtained upon detection of the microcomputer 42. Store in the built-in RAM. Accordingly, the system administrator can operate the push switch 50 connected to the microcomputer 42 to display a certain amount of data stored in the RAM on the liquid crystal display (LCD) 48, thereby confirming whether the double insulation tube is abnormal. have. Alternatively, the administrator can use the portable computer 54 to exchange data through the communication and alarm unit 52 to determine whether an abnormal phenomenon is caused by the alarm sound from the communication and alarm unit 52. A notebook PC is generally used as the portable computer 54, and the communication and alarm unit 52 employs an asynchronous communication method such as an RS-232 communication method. This communication can be done by wire or wirelessly. In the construction system, the IC chip 44 always monitors the microcomputer 42 to automatically initialize the microcomputer 42 when the system malfunctions. As the IC chip 44, a so-called one chip of 8 bits is used.

Now, the leak detection process by the leak detection device having such a configuration will be described with reference to FIG. 4 is a view for explaining the process of leak detection by the leak detection device of the construction system of the double heat insulation tube according to the present invention. In FIG. 4, the dotted line represents the sensor wire 10 of the double insulation tube, the thick solid line represents the cast iron tube 14, and the thin solid line represents the return wire 12, and A, B and C represent the sensor wire 10. , Corresponding measurement points of the cast iron pipe 14 and the return wire 12, respectively. On the other hand, the dotted squares in Fig. 3 represent the leak points. The distances between the points and the Rp points are respectively represented. The converter A / D 40 converts the input analog voltage V2 into a digital value to convert the microcomputer 42 into a digital computer 42. The microcomputer 42 calculates the leak point Lx as follows.

The same applies to devices for leak detection such as V2 = {(R22 + Rb) · Vref} / {R11 + (R22 + Rb)} and water pipes. In other words, the leak detection device used in the laboratory, warehouse, etc. has the same configuration as the leak detection device used in the construction system of the double insulation tube and finds the leak point by the same principle. Therefore, detailed description thereof will be omitted. The IC chip 44 interfaced to monitor the state of the rotor 42, the switch driver 46 for driving the switches, and the push for external input from the user are described. Communication unit 58 including a switch 50 and a push pull amplifier for reinforcing a communication output and performing communication with the microcomputer 42 (hereinafter referred to as FSK) communication unit 58 And a soft start power supply 60 for preventing inrush current and initial stabilization of the power supply device. In operation of the dual insulation pipe management system, the FSK communication unit in the leak detection device having the above-described configuration is provided. In (58), in case of a leak detection device located far away from a central monitoring device or a signal amplifier due to site conditions, a signal is attenuated by a signal transmission line to make communication difficult. To the push-pull amplifier it is provided for reinforcement of the output signal to the output stage to settle. The soft start power supply 60 employs a so-called soft start circuit for preventing inrush current into the system and for initial stabilization of the power supply. The IC chip 44 always monitors the microcomputer 42 so that the microcomputer is automatically initialized when the system malfunctions. As the IC chip 44, a so-called 8-bit one-chip is used. The pipe network of the pipe is shown. The signal transmission line indicated by the dotted line is connected in a valve box or hand hall installed at a specific part of the site in the pipe network. And the test point (TP) is installed according to the site conditions within the maximum length of the double insulation tube that the leak detection device can detect, and the correction of the abnormality of the double insulation tube or the leak detection device when removing the loop Used as a point. This test point connects the lead wire drawn from the double insulation tube inside the waterproof connection box. The installation location is suitably a valve box installed at a specific site in the site or a junction box panel installed at a hand hole or a loop separation point and a machine room. Since the leak detection device (L) is separated by a certain distance, communication between them It becomes impossible. The signal compensation device AP amplifies the data signals communicated between the central monitoring device C1 and the leak detection device L so as to allow a smooth communication. And a signal amplifier stage 68. The small signal amplifying stage 66 and the output signal amplifying stage 68 are connected to the FSK communication unit 72. In addition, the signal compensation device AP includes an IC chip 70 provided to control the operation of the switches. In the signal compensation device AP having the above configuration, when a data signal is input from the signal transmission line in the direction of the central monitoring device C1, the switches SW7 and SW8 are closed under the control of the IC chip 70, and the signal data is stored. Amplified to a predetermined level or more in the small signal amplifier stage 66 via the transformer 62, the switch SW7, and then amplified again by the push-pull amplifier of the output signal amplifier stage 68, and then the switch SW8 and the second transformer 64. Through the signal transmission line in the direction of the leak detection device (L) is transmitted to the leak detection device (L) located at the rear end. At this time, the output signal of the small signal amplifying stage 66 is input to the FSK communication unit 72, converted into digital data, and then supplied to the IC chip 70, and the IC chip 62 analyzes the digital data. When it is confirmed that the signal from the central monitoring unit (C1) is finished, open the switches SW7 and SW8 and close the switches SW9 and SW10. On the other hand, when data is sent from the leak detection device (L) at the rear end of the signal compensation device (AP), the data signal is sequentially transmitted to the signal transmission line toward the leak detection device (L), the second transformer 64, the switch SW10, and the small signal. The amplification stage 66, the output signal amplification stage 68, the switch SW9, the first transformer 62, and the signal transmission line in the direction of the central monitoring device C1 are transferred to the central monitoring device C1. At this time as well, the output signal of the small signal amplifying stage 66 is input to the FSK communication unit 58 and converted into digital data, and the data is analyzed by the IC chip 70. When it is confirmed that the signal from the leak detection device (L) is finished, close the switches SW7 and SW8 and close the switches SW9 and SW10.

As described above, the signal compensation device AP of the present invention takes a synchronous method of analyzing the contents communicated between the central monitoring device C1 and the leak detection device Li by the IC chip 70 to determine the input / output direction of the signal. have.

According to the pipe construction and management system of the present invention as described above, the efficiency of the system can be improved by quickly and accurately discovering and repairing abnormalities that may occur during the construction and operation of the wet management and the double insulation tube. Increase and prevent economic loss and environmental pollution.

Claims (19)

In the construction system of the double insulation tube, which allows the early detection and repair of abnormalities occurring during the construction of the double insulation tube, a reference voltage source connected to the sensor wire in the double insulation tube to monitor the state of the insulation tube. Current driving means; First negative feedback amplifying means connected to said current driving means for detecting a loop resistance upon leak detection; Second negative feedback amplifying means connected to said current driving means for detecting a leakage resistance upon leakage detection; Buffer means connected to the cast iron pipe in the double heat insulating tube to temporarily store measurement data for measuring a leak point upon detecting a leak; A microcomputer incorporating a RAM for controlling the entire construction system and storing data obtained when the leak is detected; And a display means for displaying a predetermined amount of data stored in the RAM to be connected to the microcomputer so that a system user can check whether the double insulation tube is abnormal. The sensor wire according to claim 1, wherein the double insulation tube is filled between the cast iron tube, the plastic tube surrounding the cast iron tube from the outside, and the cast iron tube and the plastic tube, and the sensor wire has a predetermined resistance value and is grooved at regular intervals in the coating. And a heat insulation material having a bare wire coated with a return wire coated with a complete insulator coating. 2. The apparatus of claim 1, wherein the first negative feedback amplifying means is connected at its input end to the current drive means via a first switch and at its output end to a return wire in the double insulation tube via a second switch, The second negative feedback amplifying means has a double heat insulation pipe construction system, wherein an input end thereof is connected to the current driving means via a third switch and an output end thereof is connected to a cast iron pipe in a double heat insulating tube via a fourth switch. Leak detection device. The leak detection apparatus according to claim 1, wherein the buffer means is connected to a cast iron pipe in a double heat insulating tube. The leak detection apparatus of claim 1, wherein the display means is a liquid crystal display. 5. The apparatus according to any one of claims 1 to 4, further comprising a multiplexer for selecting and transmitting signals from the first and second negative feedback amplifiers and the buffer means towards the microcomputer. Leakage detection device of double insulation pipe construction system. The integrated circuit chip according to any one of claims 1 to 4, further comprising an integrated circuit chip connected to the microcomputer and the switch driver to monitor the state of the microcomputer and to control the operation of the switches. Leakage detection device of dual insulation pipe construction system. The electronic device of claim 1, further comprising: a push switch connected to the microcomputer to transmit external input from a user to the microcomputer; A portable computer for documenting data of the construction system; The microcomputer and the portable computer are connected to the portable computer to exchange data with the portable computer as well as a communication and alarm unit for displaying when an abnormality occurs, leak detection of the double insulation tube construction system Device. In the dual insulation tube management system for detecting and repairing an abnormal phenomenon occurring during the management operation of the dual insulation tube, the standard connected to the sensor wire in the insulation tube to monitor the state of the insulation tube. Current driving means of a voltage source; First negative feedback amplifying means connected to said current driving means for detecting a loop resistance upon leak detection; Second negative feedback amplifying means connected to said current driving means for detecting a leakage resistance upon leakage detection; Buffer means connected to the cast iron pipe in the double heat insulating tube to temporarily store measurement data for measuring a leak point upon detecting a leak; A microcomputer incorporating a RAM for controlling the entire construction system and storing data obtained when the leak is detected; And a display means for displaying a predetermined amount of data stored in the RAM to be connected to the microcomputer so that a system user can check whether the double insulation tube is abnormal. 2. The sensing cable according to claim 1, wherein the sensing cable has a constant resistance value and the sensor wire having a predetermined interval in the sheath, a return wire having bare copper wire coated with a complete insulator, and a bare copper wire as a moisture absorbing insulator. A double insulation tube construction system comprising: a covered conductor, a circumferential moisture absorbing insulator surrounding the sensor wire, the return wire and the conducting wire, and a stranded shield surrounding the circumferential insulator sheath. Leak detection device. 10. The method of claim 9, wherein the first negative feedback amplifying means has its input end connected to the current drive means via a first switch and its output end connected to a return wire in the double insulation tube via a second switch, Wherein said second negative feedback amplifying means has its input end connected to said current drive means via a third switch and its output end is connected to a cast iron pipe in a double heat insulating tube via a fourth switch. Leak detection device. 10. The leak detection window of claim 9, wherein the buffer means is connected to a cast iron pipe in a double heat insulation tube. 10. The leak detection apparatus of claim 9, wherein the display means is a liquid crystal display. 13. The apparatus according to any one of claims 9 to 12, further comprising a multiplexer for selecting and transmitting signals from the first and second negative feedback amplifiers and the buffer means towards the microcomputer. Leakage detection device of dual insulation tube management system. 13. The integrated circuit chip according to any one of claims 9 to 12, further comprising an integrated circuit chip connected to the microcomputer and the switch driver to monitor the state of the microcomputer and to control the operation of the switches. Leakage detection device of dual insulation tube management system. 10. The apparatus of claim 9, further comprising: a push switch connected to the microcomputer to transmit external input from a user to the microcomputer; A push-pull amplifier for reinforcing a communication output, said communication means being connected to said microcomputer and performing communication with the microcomputer; And a soft start power source connected to the communication means to prevent inrush current and achieve initial stabilization of the power supply device. In the pipe management system for performing wet detection of a laboratory, warehouse, etc. and leak detection of a water pipe, an oil pipe, and the like, which should be kept dry using a detection cable, the detection cable is used to monitor the state of the detection cable. Current driving means of a reference voltage source connected to the sensor wire in the cable; First negative feedback amplifying means connected to said current drive means for detecting loop resistance upon wet and leak detection; Second negative feedback amplifying means connected to said current driving means for detecting wet and leak resistance upon wet and leak detection; Buffer means connected to the conductors in the sensing cable to temporarily store measurement data for measuring wet and leak points upon wet and leak detection; A microcomputer incorporating a RAM for controlling the entire pipe management system and storing data obtained upon detection of the wetting and leaking; And a display means for displaying a predetermined amount of data stored in the RAM to be connected to the microcomputer so that a system user can check whether the double insulation tube is abnormal. In the dual insulation tube management system for detecting and repairing an abnormal phenomenon occurring during the management operation of the dual insulation tube, the standard connected to the sensor wire in the insulation tube to monitor the state of the insulation tube. A current driving means of a voltage source, first negative feedback amplifying means connected to the current driving means for detecting a loop resistance when detecting leakage, and a second part connected to the current driving means for detecting leakage resistance when detecting leakage A micro-circuit containing a feedback amplification means, a buffer means connected to the cast iron pipe in the double insulation tube, for measuring a leak point when a leak is detected, and a RAM for controlling the whole construction system and storing data obtained when the leak is detected. Computer and the microcomputer is connected to the system user to check whether Display means for displaying a certain amount of data stored in the RAM so as to be confirmed, a push switch connected to the microcomputer to transmit external input from a user to the microcomputer, and a push-pull amplifier to enhance communication output. Leak detection comprising: a communication means connected to the microcomputer to perform communication with the microcomputer, and a soft start power source connected to the communication means to prevent inrush current and achieve initial stabilization of the power supply. An apparatus; A power supply device for supplying power to the leak detection device; A central monitoring device for exchanging data with the leak detecting device and managing the data; And a signal compensation device for amplifying a signal communicated between the leak detection device and the central monitoring device. 19. The apparatus of claim 18, wherein the signal compensating device comprises: first and second transformers connected to signal transmission lines, four switches connected to two outputs of the first and second transformers, and the first of the switches. And a small signal amplifier stage connected to two switches connected to the second transformer, respectively, and an output signal amplifier stage connected to two switches connected to the first and second transformers, respectively. .