KR20110072416A - A thermal monitoring device, system and method of joint box for power cables, and a joint box for power cables having the same - Google Patents

Abstract

PURPOSE: A heat monitoring device, a system and a method of a connection box for a power cable and the connection box for the power cable including the same are provided to reduce a monitoring cost by making a thermosensor or an expert unnecessary in order to monitor internal robustness or an excessive load state. CONSTITUTION: A cyan pigment(101) has a form of a microcapsule(110). Plural pairs of electron donors and electron acceptors are formed within the microcapsule. If temperature rises, plural pairs of electron donors and electron acceptors get separated from one another and show transparent colour. A casing is made of a coating layer by coating synthetic resin including the cyan pigment.

Description

A thermal monitoring device, system and method of joint box for power cables, and a joint box for power cables having the same}

The present invention relates to a thermal monitoring apparatus, a system and a method of a junction box for a power cable, and a junction box for a power cable having the same.

More specifically, the present invention relates to a heat connection of a power cable junction box that can monitor the internal health state and the overload condition of the power cable junction box using a synthetic resin to which a Zion pigment is provided on the surface of the power cable junction box. A monitoring device, a system and a method, and a junction box for a power cable having the same.

In general, a power cable junction box installed and operated in an existing power port is overheated or aged due to heat generated by a current flowing through the power cable during use. As the junction box ages, the junction box itself may be insulated and destroyed, causing a breakdown or, in severe cases, a fire may occur, resulting in an accident such as a human injury. Therefore, the junction box for the power cable is insulated from the insulation provided in the junction box or insulated in the cable connected to the junction box during installation and operation (hereinafter referred to as the "internal health state" of the junction box) and overload condition. Continuous monitoring should be done.

In order to continuously monitor the internal health state and the overload state of the junction box as described above, a monitoring method using a heat sensor and a partial discharge measuring device is used in the prior art. However, the following problem occurs in the monitoring method using the thermal sensor and the partial discharge measuring apparatus of the prior art using the heat sensor and the partial discharge measuring apparatus described above.

1. Expensive equipment such as heat detectors and partial discharge measuring devices are needed to monitor the internal health and overload conditions of junction boxes.

2. Partial discharge measurements require specialized and highly trained personnel in these areas.

3. Due to the use of thermal sensors and partial discharge measuring devices for the monitoring of junction boxes, considerable monitoring time is required.

4. In case of using partial discharge measuring device, error of measuring device occurs frequently due to noise such as air broadcasting wave, corona discharge, noise from line system or peripheral equipment, and it may cause damage to internal health and overload condition of junction box. Precise measurement is difficult.

Therefore, a new method for solving the above-mentioned problems is required.

The present invention is to solve the above-mentioned problems of the prior art, it is possible to monitor the internal health state and overload state of the power cable junction box by using a synthetic resin added Zion pigment provided on the surface of the power cable junction box. The present invention provides a thermal monitoring apparatus, a system and a method of a junction box for a power cable, and a junction box for a power cable having the same.

According to a first aspect of the present invention, a casing for forming an appearance of a junction box for a power cable in the junction box for a power cable; And a heat monitoring device provided on the surface of the casing.

According to a second aspect of the invention, there is provided a thermal monitoring system for a junction box for a power cable, comprising: a plurality of thermal monitoring devices provided on a surface of a plurality of casings that form an appearance of a plurality of junction boxes for a power cable; A plurality of distributed temperature sensing systems connected to the plurality of heat monitoring devices; And a controller connected to the plurality of distributed temperature measuring systems in a wired or wireless manner, respectively, and configured to receive a sensing result of the plurality of distributed temperature measuring systems to detect an abnormality of the plurality of power cable access boxes. It is done.

According to a third aspect of the invention, in the thermal monitoring method of a junction box for a power cable, a) identifying the color or transparency according to the temperature of the thermal monitoring device provided on the surface of the casing forming the appearance of the junction box for the power cable; Making; And b) determining whether the connection box for the power cable is abnormal according to the color or the transparency identified in step a).

According to a fourth aspect of the present invention, there is provided a method for thermally monitoring a junction box for a power cable, comprising: a) measuring a plurality of distribution temperatures connected to a plurality of thermal monitoring devices provided on a surface of each casing of the plurality of power cable junction boxes; Identifying color or transparency according to the temperature of the plurality of thermal monitoring devices at a remote location through a system; And b) determining whether any of the plurality of power cable junction boxes is abnormal according to the color or the transparency identified in step a).

The thermal monitoring apparatus or the plurality of thermal monitoring apparatuses used in the first to fourth features of the present invention described above may be implemented as a coating layer coated with a synthetic resin to which cyan pigment is added, respectively, on the surface of the casing.

The use of the thermal monitoring device, system and method of the junction box for power cables of the present invention, and a junction box for power cables having the same, the following advantages are achieved.

1. Unlike the prior art, expensive equipment such as heat detectors and the use of specialized personnel for measuring partial discharge are unnecessary to monitor the internal health and overload conditions of the junction box for power cables.

2. The cost of monitoring the internal health and overload conditions of the junction box for power cables is significantly reduced.

3. The monitoring time is significantly reduced because visual monitoring of the internal health and overload conditions of the junction boxes for power cables is possible.

4. Since the monitoring status of the junction box for power cables can be checked remotely, costs such as labor costs can be significantly reduced compared to the prior art.

5. Visual monitoring of the junction box for the power cable is possible, thus minimizing or substantially eliminating the possibility of measurement errors in the internal health and overload conditions of the junction box for the power cable.

6. When remotely checking the internal health and overload conditions of junction boxes for power cables, costs such as labor costs can be further reduced and monitoring time can be further reduced compared to the prior art.

7. Visually and easily detect the internal abnormal overheating of the power cable junction box, which is supposed to be a sign of an accident, to prevent fire and human accidents caused by the insulation breakdown of the power cable junction box, It is possible to predict in advance the internal abnormal state of the power box junction box according to the change or the change in transparency.

Further advantages of the present invention can be clearly understood from the following description with reference to the accompanying drawings, in which like or similar reference numerals denote like elements.

Hereinafter, the present invention will be described with reference to embodiments and drawings of the present invention.

The present invention is characterized by providing a synthetic resin to which a Zion pigment is added on the surface of a power cable junction box for monitoring the internal health state and the overload condition of the power box junction box. Preferably, a synthetic resin coating layer to which a Zion pigment is added may be formed on the surface of the power cable junction box. In addition, the junction box may include a terminal junction box or an intermediate junction box.

The above-mentioned Zion pigment is a pigment which changes color with temperature and is also called a thermocolor. Such Zion pigments may be classified into inorganic pigments and organic pigments according to the materials used. In addition, the Zion pigment may be classified into a reversible Zion pigment and an irreversible Zion pigment depending on whether or not the reversibility of the temperature rises. Reversible Sion pigments are pigments that change color as the temperature rises and then return to their original color when the temperature decreases, and irreversible Sion pigments change color as the temperature rises but return to their original color even when the temperature decreases. It is not a pigment.

Cyan pigments as described above are usually in the form of microcapsules.

FIG. 1A is a diagram schematically illustrating an operation according to cyan pigment and temperature added to a coating layer used as a thermal monitoring apparatus of a junction box for a power cable according to an exemplary embodiment of the present invention.

Referring to FIG. 1A, the cyan pigment 101 is typically made in the form of a microcapsule 110. The diameter size of the microcapsules 110 is approximately 1 to 10 μm. The microcapsules 110 having such a fine diameter size include a plurality of pairs of electron donors 112 and electron acceptors 114 therein. The plurality of pairs of electron donors 112 and The electron acceptor 114 is separated from each other when the temperature rises to show a transparent color, whereas when the temperature decreases, the electron acceptor 114 binds to each other and exhibits a specific color. Thus, a plurality of pairs of the electron donor 112 and the electron acceptor 114 vary with temperature. Various colors may be implemented depending on the degree of the combination or separation of the).

FIG. 1B is a view illustrating a case in which a junction box for a power cable having a thermal monitoring apparatus according to an exemplary embodiment of the present invention is in a normal state, and FIG. 1C illustrates a thermal monitoring apparatus according to an exemplary embodiment of the present invention. It is a figure which shows the case where the provided power cable connection box is in an abnormal state.

1B and 1C, first, the thermal monitoring apparatus 120 according to the preferred embodiment of the present invention may be a polyvinyl chloride (PVC) or PE (Polyethylene) to which the cyan pigment 101 is added as described above. Synthetic resin is implemented as a coating layer coated on a casing (132) to form the appearance of the junction box 130 for the power cable. Here, the coating layer used as the thermal monitoring device 120 is formed by the following method.

First, a container in which a liquid synthetic resin (hereinafter referred to as "cyan pigment-containing synthetic resin") to which the cyan pigment 101 is added is prepared is prepared. Thereafter, the casing 132 of the power cable junction box 130 is introduced into the liquid cyan pigment synthetic resin stored in the container. The casing 132 coated with the liquid cyan pigment synthetic resin on the surface is taken out of the container and dried. As a result, a cable junction box 130 having a coating layer (hereinafter referred to as "cyan pigment coating layer") coated with cyan pigment synthetic resin on the surface of the casing 132 is obtained.

The thermal monitoring apparatus 120 according to the preferred embodiment of the present invention manufactured in the above-described manner may be implemented as a municipal pigment coating layer that changes color depending on a temperature within a temperature range of approximately −15 ° C. to 70 ° C. The cyan pigment coating layer may be implemented by mixing a plurality of pigments according to the user's needs, and thus various color changes are possible. In addition, control of the temperature change is possible by adjusting the concentration of the cyan pigment used in the Zion pigment coating layer and can change the color (or transparency) step by step, typically within the range of 2 ℃ to 10 ℃. For example, whenever the temperature is changed by 3 ° C. or 5 ° C., the color (or transparency) of the cyan pigment coating layer used as the thermal monitoring device 120 is changed, thereby causing the internal state of the junction box 130 for the power cable. (I.e., health condition and overload condition) can be predicted.

In addition, when the power box junction box 130 having the heat monitoring device 120 according to an embodiment of the present invention obtained in the above-described manner is in a normal state, the heat monitoring device 120 is black. (See FIG. 1B). That is, when the temperature inside the power cable junction box 130 is in the normal range, the color of the thermal monitoring device 120 is black (or opaque). However, when an abnormality occurs in the interior of the power cable junction box 130 provided with the thermal monitoring apparatus 120 according to an embodiment of the present invention, heat is generated accordingly, so that the color of the thermal monitoring apparatus 120 is changed. It was changed to translucent (see FIG. 1C). Accordingly, as shown in FIG. 1C, since the thermal monitoring apparatus 120 is in a translucent state, an index copper color of the material of the casing 132 of the power box junction box 130 may be visually confirmed. That is, when the casing 132 of the power cable junction box 130 including the heat monitoring device 120 is black (opaque), the health state and the overload state of the junction box 130 are normal, and the heat is normal. When the color of the power cable junction box 130 with the monitoring device 120 is translucent and the material index of the casing 132 is the same color, it can be seen that the health state and the overload state of the junction box 130 are abnormal. Therefore, according to the color change (or change in transparency) of the thermal monitoring device 120, it is possible to visually check the health state and the overload state of the power cable junction box 130 very simply and conveniently.

2 is a view schematically illustrating a thermal monitoring system of a junction box for a power cable according to an exemplary embodiment of the present invention.

Referring to Figure 2, the thermal monitoring system 200 of the junction box for power cables according to an embodiment of the present invention a plurality of casing to form the appearance of a plurality of junction boxes for power cables (230a, ..., 230n) A plurality of thermal monitoring devices 220a, ..., 220n provided on the surface of 232a, ..., 232n; A plurality of distributed temperature measuring systems 240a, 240n connected to the plurality of thermal monitoring devices 220a, 220n; And wired or wirelessly connected to the plurality of distributed temperature measuring systems 240a, ..., 240n, respectively, and receiving the sensing results of the plurality of distributed temperature measuring systems 240a, ..., 240n. It includes a controller 250 for detecting the abnormality of the plurality of power cable access boxes (230a, ..., 230n). Here, the thermal monitoring system 200 of the power box junction box according to an embodiment of the present invention is connected to the controller 250, the state of the plurality of power cable junction boxes (230a, ..., 230n) The display apparatus 252 may further include a display.

Hereinafter, a detailed configuration and operation of the thermal monitoring system 200 of the junction box for power cables according to an embodiment of the present invention will be described in detail.

Referring back to FIG. 2, the thermal monitoring system 200 of a junction box for a power cable according to an embodiment of the present invention includes a plurality of junction boxes 230a,..., 230n for a power cable. The plurality of power cable junction boxes 230a, ..., 230n interconnect the plurality of power cables C, respectively. On the surface of the plurality of casings 232a, ..., 232n forming the appearance of the plurality of power cable junction boxes 230a, ..., 230n, the plurality of thermal monitoring devices 220a, ..., 220n ) Is provided. Preferably, the plurality of thermal monitoring apparatuses 220a,..., 220n are the same as the thermal monitoring apparatus 120 shown in FIGS. 1B and 1C, respectively. That is, the plurality of thermal monitoring apparatuses 220a, ..., 220n may be embodied as synthetic resin coating layers to which cyan pigments are added, respectively. The plurality of thermal monitoring devices 220a, ..., 220n are connected with the plurality of distributed temperature measuring systems 240a, ..., 240n. The plurality of distributed temperature measuring systems 240a, ..., 240n are connected to the controller 250 in a wired or wireless manner, respectively. In this case, the wired connection method may be implemented with, for example, an optical fiber. In this case, the plurality of distribution temperature measuring systems 240a, ..., 240n are connected to each other by one optical cable, and the first distribution temperature measurement is performed. The system 240a or the last distributed temperature measurement system 240n is connected to the controller 250 by an optical cable. In the embodiment of FIG. 2, the final distribution temperature measurement system 240n is exemplarily shown to be connected to the controller 250 by an optical cable. However, those skilled in the art will fully understand that the original distributed temperature measurement system 240a may be connected to the controller 250 by an optical cable. The controller 250 receives the sensing result of the state of the temperature change of the thermal monitoring apparatus 220a, ..., 220n through the plurality of distributed temperature measuring systems 240a, ..., 240n to supply a plurality of power cables. Detects the abnormality (ie, health condition and overload condition) of the dragon junction boxes (230a, ..., 230n). If the controller 250 detects an abnormality of a power box junction box among the plurality of power cable junction boxes 230a, ..., 230n, the user may determine the position of the power cable junction box where the abnormality is confirmed. You can check and take the necessary action (for example, repair or replacement of the junction box for the power cable). The controller 250 may be implemented as, for example, a microprocessor or a personal computer.

In addition, the display device 252 connected to the controller 250 displays the states (ie, health condition and overload condition) of the plurality of power cable junction boxes 230a,. It is possible to visually check whether the connection boxes 230a, ..., 230n are abnormal.

3A is a flowchart of a method for monitoring a heat of a junction box for a power cable according to an exemplary embodiment of the present invention.

Referring to Figure 3a in conjunction with Figures 1a to 1c, the thermal monitoring method 300 of the junction box for power cables according to an embodiment of the present invention a) a casing forming the appearance of the junction box 130 for power cables Identifying 310 the color or transparency according to the temperature of the thermal monitoring device 120 provided on the surface of 132; And b) determining 320 whether the power box junction box 130 is abnormal according to the color or the transparency identified in step a). Preferably, the thermal monitoring device 120 may be implemented with a synthetic resin coating layer to which the cyan pigment is added.

In addition, the thermal monitoring method 300 of the power cable junction box according to an embodiment of the present invention takes the necessary measures when c) the power cable junction box 130 is determined to be abnormal in step b). Step 330 may further include. Here, necessary measures mean repairing or replacing the junction box for the power cable.

3B is a flowchart of a method for monitoring a heat of a junction box for a power cable according to another exemplary embodiment of the present invention.

Referring to FIG. 3B in conjunction with FIGS. 1A to 2, a method for thermal monitoring 300 of a junction box for a power cable according to another preferred embodiment of the present invention includes a) a plurality of junction boxes 230a, ... A plurality of distributed temperature measuring systems 240a, ... connected to a plurality of thermal monitoring devices 220a, ..., 220n provided on the surfaces of respective casings 232a, ..., 232n of .230n. Checking (310) color or transparency according to the temperatures of the plurality of thermal monitoring devices (220a, ..., 220n) at a remote location through 240n; And b) determining whether or not any of the plurality of power cable junction boxes 230a,... 230n is abnormal according to the color or the transparency identified in step a) (320). ). Preferably, the plurality of thermal monitoring apparatuses 220a, ..., 220n may be embodied as synthetic resin coating layers to which cyan pigments are added, respectively.

In addition, in the thermal monitoring method 300 of the junction box for a power cable according to another embodiment of the present invention, the step b) is wired or with the plurality of distribution temperature measurement system (240a, ..., 240n) It is performed by the controller 250 connected in a wireless manner. In this case, the step b) is a plurality of b1) on the display device 252 connected to the controller 250 connected in a wired or wireless manner to the plurality of distribution temperature measurement system (240a, ..., 240n). The method may further include a step 322 of visually displaying a state of the junction boxes 230a,..., 230n for the power cables. Therefore, the user can visually check whether the plurality of power boxes junction boxes 230a, ..., 230n are abnormal.

In addition, the thermal monitoring method 300 of the power cable junction box according to another embodiment of the present invention is c) any of the plurality of power cable junction boxes (230a, ..., 230n) in step b) If it is determined that something is wrong with the junction box for the power cable, step 330 is required. Here, the necessary measures mean repairing or replacing the junction box for any power cable determined to be abnormal.

Various modifications may be made by those skilled in the art without departing from the spirit and scope of the invention as defined by the following claims. It is not. Accordingly, the scope of the present invention should not be limited by the above-described exemplary embodiments, but should be determined only in accordance with the following claims and their equivalents.

FIG. 1A is a diagram schematically illustrating an operation according to cyan pigment and temperature added to a coating layer used as a thermal monitoring apparatus of a junction box for a power cable according to an exemplary embodiment of the present invention.

FIG. 1B is a diagram illustrating a case in which a junction box for a power cable having a thermal monitoring apparatus according to an exemplary embodiment of the present invention is in a normal state.

1C is a diagram illustrating a case in which a power box junction box having a thermal monitoring apparatus according to an exemplary embodiment of the present invention is in an abnormal state.

2 is a view schematically illustrating a thermal monitoring system of a junction box for a power cable according to an exemplary embodiment of the present invention.

3A is a flowchart of a method for monitoring a heat of a junction box for a power cable according to an exemplary embodiment of the present invention.

3B is a flowchart of a method for monitoring a heat of a junction box for a power cable according to another exemplary embodiment of the present invention.

Claims (20)

In the junction box for the power cable, A casing forming an appearance of the junction box for the power cable; And A heat monitoring device provided on the surface of the casing Junction box for a power cable comprising a. The method of claim 1, The thermal monitoring device is a connection box for a power cable, characterized in that implemented as a coating layer coated with a synthetic resin to which the cyan pigment is added on the surface of the casing. 3. The method of claim 2, The synthetic resin junction box for power cables, characterized in that the PVC (polyvinyl chloride) or PE (polyethylene). The method of claim 1, The power box junction box is a power cable junction box, characterized in that any one or both of the intermediate junction box and the termination junction box. The method according to claim 1, wherein The thermal monitoring device is black when the power box junction box is in a normal state, and the thermal monitoring device is translucent when the power box junction box is in an abnormal state. In the thermal monitoring system of the junction box for power cables, A plurality of thermal monitoring devices provided on the surfaces of the plurality of casings that form the exterior of the plurality of power cable junction boxes; A plurality of distributed temperature sensing systems connected to the plurality of heat monitoring devices; And The controller is connected to each of the plurality of distributed temperature measuring systems in a wired or wireless manner, and receives a sensing result of the plurality of distributed temperature measuring systems to detect an abnormality of the plurality of power cable access boxes. Thermal monitoring system of a junction box for a power cable comprising a. The method of claim 6, The plurality of thermal monitoring apparatus is a thermal monitoring system for a power cable junction box, characterized in that each of the plurality of the casing is implemented as a coating layer coated with a synthetic resin added cyan pigment on the surface of the casing. The method of claim 6, The synthetic resin is PVC (polyvinyl chloride) or PE (polyethylene) heat monitoring system for a power cable junction box. The method of claim 6, The power box junction box is a thermal monitoring system of the power box junction box, characterized in that any one or both of the intermediate junction box and the termination junction box. The method of claim 6, The wired method is a method in which the plurality of distributed temperature measuring systems are connected to each other by one optical cable, and the first distributed temperature measuring system or the last distributed temperature measuring system among the plurality of distributed temperature measuring systems is connected to the controller by an optical cable. Thermal monitoring system of the junction box for power cables, characterized in that. The method of claim 6, And said controller is implemented as a microprocessor or a personal computer. The method according to any one of claims 6 to 11, The thermal monitoring system of the power cable junction box further comprises a display device connected to the controller and displaying a state of the plurality of power cable junction boxes. In the thermal monitoring method of the junction box for power cables, a) checking the color or transparency according to the temperature of the thermal monitoring device provided on the surface of the casing forming the appearance of the junction box for the power cable; And b) determining whether the connection box for the power cable is abnormal according to the color or the transparency identified in step a). Thermal monitoring method of the junction box for a power cable comprising a. The method of claim 13, The thermal monitoring method of the power box junction box further comprises the step of c) taking necessary measures if it is determined in step b) that the power box junction box is abnormal. Heat monitoring method. 15. The method of claim 14, And the necessary action is to repair or replace the junction box for the power cable. In the thermal monitoring method of the junction box for power cables, a) identifying color or transparency according to the temperature of the plurality of thermal monitoring devices at a remote location through a plurality of distributed temperature measuring systems connected to the plurality of thermal monitoring devices provided on the surfaces of each casing of the plurality of power cable junction boxes; Making; And b) determining whether any of the plurality of power cable junction boxes is abnormal according to the color or the transparency identified in step a). Thermal monitoring method of the junction box for a power cable comprising a. The method of claim 16, The step b) is a thermal monitoring method of the junction box for power cables carried out by a controller connected in a wired or wireless manner with the plurality of distributed temperature measuring system. The method of claim 17, The step b) further comprises b1) visually displaying the state of the junction box for the plurality of power cables on a display device connected to a controller connected in a wired or wireless manner with the plurality of distributed temperature measuring systems. Thermal monitoring method for junction boxes for cables. The method of claim 16, The thermal monitoring method of the junction box for the power cable further includes the step c) taking the necessary measures when it is determined in step b) that there is an abnormality in the junction box for any of the plurality of power cables. Thermal monitoring method of the junction box for power cables. The method of claim 19, And the necessary action is to repair or replace the junction box for any of the power cables determined to be faulty.

Images