KR101986291B1 - Junction box with stable contact and excellent temperature control and corrosion prevention - Google Patents

Abstract

Disclosed is a junction box with stable contact and excellent temperature control and corrosion prevention. The junction box includes: an enclosure having a receiving space with a front surface opened and a measuring module installed in the receiving space to measure a potential of a target object embedded in the ground; a packing which is coupled to an open front surface edge; a door for opening and closing an open front surface of the enclosure; a hinge portion for connecting the door and the enclosure and positioned inside the door when the door is closed; and a transmitting portion for transmitting rectification information on an abnormal temperature inside the junction box. The packing includes: a slot into which the open front surface edge is fitted; an air layer which is formed on an upper portion of the slot and having an empty space, and an opening on a side of the enclosure through which a cable of the measurement module for measuring the potential of the object passes. The door has an inner side surface of the edge inclined in a direction crossing a direction parallel to a front surface of the door, includes a locking device operated by a key, and is constructed to be opened to an angle at which the enclosure is parallel to the inner side surface of the edge with respect to when the door is closed. The hinge portion includes: an enclosure fixture which is installed on an outer side surface of the open front edge of the enclosure; a door fixture which is installed on the inner side surface of the edge of the door; hinges which is formed on both ends of the enclosure fixture and the door fixture and rotatably connected by a shaft pin; and a temperature estimating device which is provided as a flexible PCB such that one end of the temperature is connected to the enclosure fixture to measure and estimate the temperature of the enclosure and the other end is connected to the door fixture to measure and estimate the temperature of the door.

Description

Junction box with stable contact and excellent temperature control and corrosion prevention {omitted}

The present invention relates to a junction box, and more particularly, to a junction box having an excellent temperature control and corrosion prevention.

In general, the term "corrosion" refers to a material that reacts with the surrounding environment to change its properties or to change its properties. Most of these corrosion occur because of the electrochemical reaction caused by the movement of electrons, so it is called electrochemical corrosion. In particular, cable lines and oil pipelines buried in the ground react with the surrounding environment in the electrolyte, resulting in a corrosive battery state, thereby generating corrosion current. When the corrosion cell is formed, the more active is the anode and the lower the potential is corroded more quickly. Therefore, there is a need for a technique to prevent corrosion by sensing and controlling minute current differences.

Recently, a rectifier has been used as an electric facility for preventing corrosion of objects (electric cables, pipelines such as oil pipelines) buried underground. The rectifier for this method is a device for flowing a constant DC current through the soil (electrolyte) to the subject so as to lower the electric potential of the subject to -850 mV / CSE or less, which is a predetermined standard value, so as not to corrode the subject.

That is, if the potential of the object to be buried in the ground and the reference potential of the reference electrode are measured through the junction box and the output of the method rectifier is set based on the measured potential, (HSCI) buried in the insulated anode (HSCI) buried in the ground electrode, and the potential of the suspended object is kept at -850 mV or lower (for example, -1000 mV) Way object is made to be the method.

Therefore, junction boxes, which play an important role in corrosion protection equipment, need to be safeguarded from external contaminants and need to deliver the necessary information in detail and quickly to the rectifier.

Registered Utility Model Bulletin 20-0480052

SUMMARY OF THE INVENTION The present invention provides a junction box of an anti-corrosive facility that can completely block the inflow of external contaminants.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a junction box of an anti-corrosion facility in which a hinge is not exposed to the outside.

A technical object of the present invention is to provide a junction box of an anti-corrosion facility having a stable contact and excellent temperature control effect.

According to one aspect of the present invention, a junction box includes a housing having a receiving space with a front surface opened, a measuring module for measuring an electric potential of a method of the present invention embedded in the receiving space, a packing coupled to an open front edge, A door that opens and closes the open front of the housing, a hinge portion that is located inside the door when the door is closed when the door and the housing are closed, and a feeder that sends out the rectification information about the temperature inside the junction box. The packing has an air layer including a slot in which an opened front edge is inserted and an empty space formed in an upper portion of the slot, and openings through which cables of the measurement module for measuring the potential of the blocking object pass are formed on the side surface of the enclosure, Wherein the inner side surface is inclined in a direction intersecting a direction parallel to the front surface of the door and includes a lock operated by a key and is inclined to an angle at which the enclosure and the inner surface of the edge are parallel to each other when the door is closed The door hinge is provided on the inner side of the edge of the door. The hinge portion is formed at both ends of the door fixing member and the door fixing member. The hinge portion is rotatably connected with the shaft pin. And one end of the hinge is connected to the housing fixing piece to measure and estimate the temperature of the housing, Connected to jeongpyeon to estimate by measuring the temperature of the door and a temperature estimation device that is provided with a flexible PCB.

According to the present invention, since the air layer of the packing functions as a buffer, the opening and closing operation is smooth and the sealing force with the door is improved, so that the inflow of external contaminants can be completely prevented.

The hinge of the present invention has a remarkable effect of preventing corrosion and contamination of the hinge which is not exposed to the outside.

According to the present invention, the rectifying effect is excellent because it is excellent in temperature measurement and control with stable contact in the connection structure in the box.

1 is a perspective view showing a junction box of an anti-corrosion facility according to an embodiment of the present invention.
2 is an exploded perspective view showing a junction box of an anti-corrosion facility according to an embodiment of the present invention.
3 is a cross-sectional view of a packing of a junction box of an anticorrosive equipment in accordance with an embodiment of the present invention.
FIG. 4 is a view showing a door of a junction box of an anti-corrosion facility according to an embodiment of the present invention.
5 is a perspective view of a hinge portion of a junction box of an anti-corrosion facility according to an embodiment of the present invention.
6A and 6B are cross-sectional views showing the operation of the hinge portion.
7 is a block diagram showing a configuration of a temperature estimating device included in a hinge portion of a junction box of an anticorrosive equipment according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Also, in order to clearly illustrate the present invention in the drawings, portions not related to the present invention are omitted, and the same or similar reference numerals denote the same or similar components.

The objects and effects of the present invention can be understood or clarified naturally by the following description, and the objects and effects of the present invention are not limited only by the following description.

The objects, features and advantages of the present invention will become more apparent from the following detailed description. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIGS. 1 and 2 are a perspective view and an exploded perspective view showing a junction box of an anti-corrosion facility according to an embodiment of the present invention, FIG. 3 is a sectional view of a packing, and FIG.

The junction box 10 of the corrosion preventive device according to the present invention measures the electric potential of an object to be treated in a rectifying facility, which is an electric facility for preventing corrosion of objects (electric cables, pipelines such as oil pipelines) Measurement module can be installed.

1 through 4, a junction box 10 of an anti-corrosion facility may include an enclosure 100, a packing 200, a door 300, and a hinge 400. In addition, temperature or rectification-related information measured inside the junction box 10 may be connected to the inside or outside of the junction box 10 by the sending unit 500. The sending unit 500 may transmit the rectifying- And is sent to the rectifier 900 for preventing corrosion.

The housing 100 is provided with a receiving space 102 with its front surface opened. A measuring module (not shown) may be installed in the receiving space 102 to measure the potential of the object to be covered in the ground. The housing 100 has a frame 110 formed on its front surface. The enclosure 100 may be made of stainless steel that is resistant to salt and is resistant to corrosion.

The packing 200 is made of a silicone material and is coupled to the rim 110 formed on the open front face of the housing 100. The packing 200 has a slot 212 and an air layer 222. For example, the packing 200 has a pair of wing portions 210 surrounding both sides of the rim portion 110 and a slot 212 formed between the wing portions 210 and into which the rim portion 110 is inserted. The packing 200 has a head portion 220 having an air layer 222 formed as an empty space formed on the slot 212. The head part 220 directly contacts with the door 300 and can smoothly open / close and improve the sealing performance by buffering the air layer 222.

The door 300 opens and closes the open front face of the housing 100. The door 300 is provided with a locking device 340. The locking device 340 may be actuated by a key 350. The door 300 and the housing 100 can be connected and opened and closed by the hinge part 400. [ The hinge part 400 has a structural feature that it is located inside the door 300 when it is closed.

Fig. 5 is a perspective view of a hinge portion, Figs. 6A and 6B are a main cross-sectional view showing an operating state of the hinge portion, and Fig. 7 is a block diagram showing a configuration of a temperature estimating device included in the hinge portion.

5 to 6B, the hinge part 400 includes a housing fixing piece 410, a door fixing piece 420, and a shaft pin 430. [ The housing fixing piece 410 is installed on the outer side surface 112 of the open front edge 110 of the housing 100. The door fixing piece 420 is installed on the inner side surface 310 of the door 300. The housing fixing piece 410 and the door fixing piece 420 include hinges 412 and 422 to which the shaft pins 430 are coupled at both ends, As shown in Fig.

6A and 6B, the hinge 400 is not exposed to the outside by the inner side edge 310 of the door 30 when the door 300 is closed. The edge of the door on which the door fixing piece 420 is mounted is formed to be inclined at a predetermined angle from the front surface of the door 300 so that the door 300 is turned by 90 degrees or more when the door 300 is opened, have.

7, the hinge part 400 includes a temperature estimating device 440, one end of which is connected to the housing fixing part to measure and estimate the temperature of the housing, and the other end to the door fixing part, .

The temperature estimating device 440 may be provided as a flexible PCB and may be attached to the hinge. Both ends of the temperature estimating device 440 are connected to a housing (or a housing fixing member) or a door (or a door fixing member), respectively.

The temperature estimating apparatus 440 includes a sensing unit 442 for sensing a current value in the door and the enclosure, respectively; A calculating unit 444 for calculating an average power loss value by using each detected average current value; A converter (446) for converting an average power loss value to an instantaneous power loss value of a door or an enclosure based on phase information of an instantaneous current sensed from a door or an enclosure; And an estimator (448) for estimating temperature values at both ends of the temperature estimating apparatus using the converted instantaneous power loss value and the power value of the diode unit connected to the temperature estimating apparatus,

The estimating unit 448 is connected to the diode unit 450. The diode unit 450 receives the temperature values at both ends estimated by the estimating unit and calculates an average value of the temperature values at the both ends, And the difference between the temperature values at the both ends is equal to or less than a predetermined second threshold value, it is determined that a temperature abnormality occurs and is connected to the diode unit 450 which operates. For example, the first threshold value is a reference value for estimating the temperature inside the reference value junction box with respect to the average of the temperature values at both ends. That is, it is an element that becomes the reference value of the temperature control of the junction box. The second threshold value is a reference value for the difference between temperature values of the enclosure and the door, and is an element for judging whether the temperature control device operates properly. This is because when the junction box is used for a walkway object, there may be a minute temperature difference between the door and the enclosure depending on whether the rectifier is operating or not, when the surrounding is not air but earth or other materials. If the temperature difference is not less than a predetermined threshold value This can affect the operation of the diode.

The diode unit 450 may be provided inside the temperature estimating apparatus 440 but may be connected to the temperature estimating apparatus 440 and the discharging unit 500 or may be provided inside the discharging unit 500.

The diode unit 450 includes a plurality of power switching circuit means for providing pulses of different values according to the range of the difference in temperature values at both ends received at the estimating unit; Wherein the output of the switching circuit means is connected to the input of one of a plurality of isolation diodes for protection of the switching circuit means, and a conductive conduction means for receiving the estimated isolation diode and connecting the output portions of the estimated isolation diode And an electrical housing. In one example, the diode portion 450 may itself display switching related information on the display or send it directly to an external (e.g., conventional rectifier). In addition, the plurality of power switching circuit means operate on the basis of the difference between the temperature values of the enclosure and the door, and in particular stop the diode operation itself if it is above the second threshold value.

When the diode unit 450 operates, the sending unit 500 sends the rectifying information set based on the temperature values at both ends estimated by the estimating unit 440 to the rectifier 900 for the method. Here, the rectification information may include information on whether or not the junction box temperature is abnormal, information on the amount or speed of the current to be discharged from the rectifier, information on whether the rectifier operates normally or the like.

In another example, the dispatcher 450 uses the following equation to calculate rectification information based on temperature values at both ends of the temperature estimating apparatus 440 that reflects the power value of the diode unit 450, . That is, the final power value of the temperature estimating apparatus 440 can be calculated by integrating the power values measured by the diode unit 450, as well as the temperature values measured and estimated at the both ends of the temperature estimating apparatus 440 . The temperature estimation device 440 calculates the rectification information to be sent to the mode rectifier based on the calculated result.

    ≪ Equation &

Where P _{av, loss} is the average power loss value of the temperature estimator, P _{av, H} is the average power loss value calculated by the temperature estimator, P _{av, D} is the average power loss value of the diode _, average retention value of the estimator, V _{CE (SAT)} is a temperature estimated collector of the device - the saturation voltage of the emitter, T _on is the turn-on time of the diode, f _c is the switching frequency, E _on the diode turn-on loss of the diode , E _off is the turn-off loss of the temperature estimator, I _{av, D} is the average current value of the diode, T _off is the turn-off time of the diode, V _F is the voltage applied when the diode is turned on, It can be a loss if recovered. A more fine current difference can be detected by calculating the estimated equation by integrating the average power loss value of the diode with the average power loss value of the temperature estimating apparatus.

It will be apparent to those skilled in the art that various modifications, additions and substitutions are possible, without departing from the spirit and scope of the invention as defined by the appended claims. Should be regarded as belonging to the above-mentioned patent claims.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventive concept as defined by the appended claims. But is not limited thereto.

In the above-described exemplary system, the methods are described on the basis of a flowchart as a series of steps or blocks, but the present invention is not limited to the order of the steps, and some steps may occur in different orders . It will also be understood by those skilled in the art that the steps shown in the flowchart are not exclusive and that other steps may be included or that one or more steps in the flowchart may be deleted without affecting the scope of the invention.

Claims (2)

And a measuring module for measuring an electric potential of an object to be handled, which is provided in the receiving space and has an open front face, a packing coupled to an open front edge, a door for opening and closing the open front face of the housing, A hinge portion which connects the door and the housing and is located inside the door when the door is closed, and a dispenser for transmitting the calculated junction box-related rectification information calculated from the hinge portion, ,
Wherein the packing has an air layer including a slot into which the opened front frame is inserted and an empty space formed in the upper part of the slot and openings through which cables of the measurement module for measuring the potential of the object to be measured are passed, Including,
Wherein the door includes a locking device formed to be inclined in a direction intersecting with a direction parallel to the front surface of the door and having a key operated by the door, wherein when the door is closed, And is configured to be tilted to an angle at which the side surface becomes parallel,
Wherein the hinge includes a housing fixing piece installed on an outer side surface of an opened front side of the housing, a door fixing piece installed on an inner side of an edge of the door, a housing fixing piece formed on both ends of the housing fixing piece and the door fixing piece, And a temperature estimating device connected to the housing fixing part at one end to estimate the temperature of the housing and the other end connected to the door fixing part to estimate the temperature of the door,
Wherein the temperature estimating device comprises: a sensing unit for sensing current values in the door and the enclosure, respectively; A calculating unit for calculating an average power loss value using each of the detected average current values; A converter for converting the average power loss value into instantaneous power loss value of the door or the enclosure based on phase information of the instantaneous current sensed from the door or the enclosure; And estimating means for estimating temperature values at both ends of the temperature estimating apparatus using the converted instantaneous power loss value and the power value of the diode unit connected to the temperature estimating apparatus,
Wherein the temperature estimating device receives a temperature value at both ends of the temperature estimating device estimated by the estimating part, and when an average of the temperature values at the both ends received is equal to or greater than a predetermined first threshold value and the temperature value at the both ends received, Is less than a predetermined second threshold value and is connected to a diode unit which operates based on the determination that a temperature abnormality has occurred,
Wherein the diode unit comprises: a plurality of power switching circuit means for providing pulses of different values according to a range of difference in temperature values at both ends received at the estimating unit;
The power transfer circuit means having an output of the switching circuit means connected to one of the plurality of diodes for protection of the switching circuit means;
And an electrical housing having an electrically conductive portion for receiving the isolation diode and connecting the outputs of the isolation diode,
Wherein the transmitter sends the temperature value estimated by the temperature estimating device to the rectifier for setting the rectification information when the diode unit is operated,
Wherein the first threshold value is a reference value relating to an average of temperature values at both ends estimated by the estimating unit and is a reference value for adjusting a temperature inside the junction box, and the second threshold value is a difference between a temperature value of the enclosure and a door Is a reference value for determining the suitability of the operation of the temperature estimating apparatus,
Wherein the switching circuit means operates on the basis of a difference value between the temperature values of the enclosure and the door and stops the diode operation itself if the difference value between the enclosure and the temperature value is equal to or more than the second threshold value. The method according to claim 1,
Wherein the calculating unit estimates a temperature value of the temperature estimating apparatus by reflecting a power value of the diode unit through the following equation.
≪ Equation &

Here, P _{av, loss} is the average power loss value of the temperature estimating device, P _{av, H} is the average power loss value calculated by the temperature estimating device, P _{av, D} is the average power loss value of the diode, I _{av, H} is the average value of the temperature estimating device, V _{CE (SAT)} is the saturation voltage of the collector-emitter of the temperature estimating device, T _on is the turn-on time of the diode, f _c is the switching frequency of the diode, E _on the turn-on loss of the diode, E _off the turn-off loss of the temperature estimating device, I _{av, D} is the mean current value of the diode, T _off is the turn-off time of the diode, V _F is the diode is turned on And Err is the loss if the diode is reversed.

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