KR20230133540A - Conductor connecting assembly including odorant - Google Patents

Abstract

The present invention discloses a conductor connection assembly with odorant, which includes: a body; odorant formed in an internal space of the body; an opening formed at one end of the internal space; a member which closes the opening but can be detachable from the opening when exposed to heat from a conductor; and an elastic means formed in the internal space to promote separation, wherein the odorant can release gas from the internal space to the outside by the heat and elastic means of the conductor. Therefore, it is possible to determine the level of fire signs by stage and predict the loosening of the conductor connection assembly.

Description

Conductor connection assembly containing odorant {CONDUCTOR CONNECTING ASSEMBLY INCLUDING ODORANT}

The present invention relates to a conductor connection assembly formed with an odorant-based display material that displays fire signs.

<Characteristics of insulators for electrical conductors>

Insulators for electrical conductors such as wires, tubes, and terminal blocks contain flame retardants to prevent combustion from proceeding smoothly even when the temperature of the conductor rises, but once ignited, they combust easily and burn for a long period of time, acting as a factor in the spread of fire.

Some flame retardants, such as halogen elements, are harmful to the human body when burned and generate induced gases that cause corrosion of conductors.

Therefore, there is a need for technology that can detect fire signs at an early stage before insulators and develop surface materials that do not contain flame retardants to fundamentally prevent electrical fires in advance.

<Cause of temperature rise of conductor>

Electrical equipment supplies or distributes electricity through connections between conductors, and connections between conductors are made through bolts/nuts.

Conventionally, when a conductor is used for a long period of time, the contraction and relaxation of the conductor may occur due to the flow of current and temperature differences due to seasonal changes, and the contraction and relaxation of the conductor may cause a loosening phenomenon in which the compression of the bolt/nut becomes loose.

In the past, the electric field was concentrated in the direction where the loosening phenomenon occurred, which may cause thermal decomposition (deterioration) of the insulator, and if it becomes more severe, combustion may expand and a fire may occur.

Conventionally, heat may be generated due to poor contact such as loosening of bolts/nuts, heat may be generated due to overcurrent, and thermal decomposition of the insulator may occur due to poor contact or overcurrent.

Therefore, in order to prevent electrical fires, there is a need for technology to quickly detect loose bolts/nuts by detecting gases generated from exposed materials or changing their appearance before thermal decomposition of the insulator occurs, and to prevent fires by tightening the loose bolts/nuts. am.

<Temperature regulations for electrical equipment>

Figure 1 is an example of the judgment criteria for the electrical equipment temperature pattern method. Korea's electrical regulations stipulate the temperature rise limit and maximum allowable temperature, which indicate abnormalities or risks of electrical equipment such as overcurrent or poor connection, and the electric facility manager must use infrared heat. The temperature of electrical equipment was measured passively using a video camera.

The electric facility manager measured the temperature at the connection points between conductors where overcurrent or connection failure occurred, found high temperature points, and tightened loose bolts/nuts.

Recently, manual inspection by electric facility managers is required, which can lead to a waste of manpower and pose a risk to the safety of managers, so sensors have been used to detect abnormalities or risks in electrical facilities.

<Conventional sensor technology>

Figure 2 is an example of a conventional sensor technology. In the past, an electrical fire was monitored using a smoke sensor, a flame sensor, and a camera, as in Patent Document 1, which was described as prior art, but the detection occurred after the electrical fire occurred, not before. Therefore, there is a problem that it is difficult to prevent human/material damage in advance.

In the past, thermoelectric materials were installed at each connection point between conductors as shown in Patent Document 2, so there was a problem in that the cost for installing thermoelectric materials increased, and multiple contact points occurred due to the thermoelectric materials, resulting in abnormal electric field strength of the conductors or loss of electrical energy. There is a problem that may cause loss.

Conventionally, as in Patent Document 3, an infrared thermal imaging camera was installed at each connection point between conductors, so there is a problem that the cost for installing an infrared thermal imaging camera increases. Additionally, in the prior art, there is a problem in that the accuracy of temperature measurement may be reduced due to signals reflected by the conductor.

Conventionally, electrical fires were monitored using an arc sensor as shown in Patent Document 4, but even when an arc fault signal does not actually occur, it may be judged to be an arc fault signal and cause malfunction. For example, in the past, the output voltage when an arc occurs and the pulse voltage that occurs when starting power equipment are similar, making it difficult to accurately detect arcs caused by overcurrent.

Conventionally, gas generated by the deterioration of the insulator was detected as shown in Patent Document 5, but since the gas was detected in a state far exceeding the maximum allowable temperature of the conductor, the risk level of fire occurrence may be very high.

Therefore, there is a need for a technology using a display material that can solve the existing problems and monitor fire signs near the maximum allowable temperature of the conductor or before deterioration of the insulator occurs.

<Detection of abnormalities at connection points between bus bars>

Among electrical facilities, a panel for operating electrical equipment is located on the front of the switchboard, and a number of bus bars are located on the back to distribute and transmit electricity. Connections between bus bars are made through conductor connection assemblies such as bolts/nuts.

Conventionally, the connection between bus bars was provided using conductor connection assemblies such as bolts/nuts, but due to the absence of a material that expresses separate fire signs at the connection area between bus bars, abnormalities at the connection point between bus bars, such as loosening of bolts/nuts, etc. There is a problem that makes it difficult to detect. Therefore, there is a need to develop display materials to solve these problems.

<Conventional detection agent>

Conventionally, as shown in Patent Document 6, a detection agent is formed in the conductor connection part, and gas is generated when melted above a predetermined temperature, and heat generation of high voltage equipment can be detected through gas detection.

The conductor connection portion is formed with a plurality of bolts/nuts (conductor connection assemblies) to provide a connection between busbars, and conventionally, a detection agent was applied to the busbar adjacent to the plurality of conductor connection assemblies.

However, since the conventional method is to apply a detection agent to the busbar, there is a problem in that the manager cannot tell which conductor connection assembly the loosening occurred.

In addition, although the conventional detection agent has some similarities to the function of the display material, the technology for the display material for early detection of fire signs that can thermally decompose before the insulator and the technology to detect the display material and the insulator together to determine the level of fire signs by stage are insufficient. This is the situation.

<Conventional fire sign prediction method>

Figure 3 is an example showing a conventional fire sign prediction method, and Figure 4 is an example showing a fire sign display material of the present invention for comparison with the conventional fire sign prediction method. In the past, as described above, the loosening phenomenon The electric field is concentrated in the direction where it is generated, causing deterioration of insulators such as cables, and gas is generated due to the deterioration of the insulator. When the gas comes into contact with air or moisture, ultrafine particles in the form of fine dust are generated, and when it gets worse, visible smoke is generated. Occurs. Eventually, if it becomes more severe, combustion expands and flashover, or fire, occurs.

Conventionally, signs of fire were monitored by detecting gas in the insulator, but there was no concrete method for monitoring fire signs earlier than the deterioration of the insulator, such as when microdischarges occur and the temperature rises, or for monitoring ultrafine particles, so prediction methods were used. There is a problem with low accuracy. Therefore, technology to improve the accuracy of prediction methods is needed.

<Gas characteristic characteristics test>

Conventionally, as shown in Non-Patent Document 1, a combustion object is placed inside a chamber, and the combustion object is directly heated to analyze the harmfulness of gas, which is a thermal decomposition product of the combustion object. The target of combustion is insulators for electrical conductors such as wires, tubes, and terminal blocks.

The insulator surrounds the conductor to insulate the conductor, and can be thermally decomposed by receiving heat from the conductor. The display material included in the present invention is formed in a conductor connection assembly that provides a connection between conductors, and like an insulator, it can be thermally decomposed by receiving heat from the conductor.

However, in the past, it may be difficult to obtain reliable experimental data by directly applying insulation rather than applying heat to the conductor.

In addition, in the past, experimental data on the heating temperature of the insulator and the resulting gas concentration were provided, but there is a problem in that it cannot be applied to the development of an algorithm for determining the level of fire signs.

In addition, since conventional experimental data is about the heating temperature of directly heating the insulator rather than measuring the temperature of the conductor, it is difficult to apply the experimental data to the judgment criteria of the electrical equipment temperature pattern method of Figure 1 in algorithm development, and reliable experimental data may be difficult to obtain.

Korean Patent No. 10-2101698 Korean Patent No. 10-1647456 Korean Patent No. 10-1287906 Korean Patent No. 10-1993832 Korean Patent No. 10-1691164 Japanese Patent Publication No. 2019-097248

Park Soo-young et al., Journal of the Korea Fire Protection Society, Volume 20, No. 4, 2006, pp. 26-32.

In order to solve the above problem, the present invention provides an odorant formed in the internal space of the body, an opening formed at one end of the internal space, a member that closes the opening but can escape from the opening when receiving heat from a conductor, and a member in the internal space. Provided is a conductor connection assembly containing an odorant that is formed and includes elastic means to promote separation.

A conductor connection assembly containing an odorant according to an embodiment of the present invention for the above problem to be solved includes a body 110; Odorant 200 formed in the internal space 130 of the body; An opening 170 formed at one end of the internal space; It includes a member (150 or 181) that closes the opening but can separate from the opening when exposed to heat from the conductor, and an elastic means (160) formed in the internal space to promote departure, and the odorant absorbs the heat and elasticity of the conductor. It is characterized in that gas can be released from the internal space to the outside by means.

The present invention can provide early detection of fire signs, discrimination of the level of fire signs by stage, and prediction of loosening of the conductor connection assembly by using an odorant-based expressing material that expresses fire signs.

Figure 1 is an example showing the judgment criteria for the electrical equipment temperature pattern method.
Figure 2 is an example showing conventional sensor technology.
Figure 3 is an example showing a conventional fire sign prediction method.
Figure 4 is an example showing a fire sign display material of the present invention for comparison with a conventional fire sign prediction method.
Figure 5 is a cross-sectional view showing an electrical fire prevention system according to an embodiment of the present invention.
Figure 6 shows a fire sign prediction method according to an embodiment of the present invention.
Figure 7 is a block diagram showing an electrical fire prevention system according to an embodiment of the present invention.
Figure 8 shows a conductor connection assembly according to the first embodiment.
FIG. 9 shows a state in which the discharge ring is removed from the conductor connection assembly of FIG. 2.
Figure 10 shows a conductor connection assembly according to a second embodiment of the present invention.
FIG. 11 shows a state in which the conductor connection assembly of FIG. 10 is separated from the fitting portion.
Figure 12 shows a conductor connection assembly according to a third embodiment of the present invention.
Figure 13 shows the conductor connection assembly of Figure 12 in a state separated from the fuse-type display part.
Figure 14 shows a conductor connection assembly according to a fourth embodiment of the present invention.
Figure 15 is a cross-sectional view showing a fire sign gas measuring device of a switchboard model according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings and the contents described in the accompanying drawings, but the present invention is not limited or limited by the embodiments.

Figure 5 is a cross-sectional view showing an electrical fire prevention system according to an embodiment of the present invention, in which a conductor transmits electricity. A conductor is included in an electrical installation, installation, or electrical device.

Electrical equipment is divided into heavy electrical equipment, home appliances, and industrial equipment. Heavy electrical equipment may be called electric power equipment and refers to equipment used for the production, transportation or conversion of electrical energy. Heavy electrical equipment can transmit electrical energy through conductors. Home appliances and industrial appliances refer to devices that are driven using electrical energy.

Electrical equipment can be classified into various devices such as transformers, disconnectors, bus-bars such as conductors, terminal blocks, wires, and fixed winding resistors, and conductors such as bolts and nuts for connection between conductors such as the transmission of electrical energy. It may include a connection assembly 100.

Electrical equipment may be included in electrical installations. Electrical facilities are largely divided into power plants that produce electricity, substations that convert the voltage of the electricity produced in the process of sending it to power consumers, distribution boards that stably distribute and supply electricity to power consumers, and electricity consumers used by power consumers. Includes facilities.

The switchboard may include a high-voltage switchboard, a low-voltage switchboard, a motor control panel, and a distribution board. Electrical facilities may refer to facilities that exist in domestic, industrial, or buildings.

Switchboards are used to reliably distribute and supply electricity to power consumers who need electricity, such as apartments, schools, factories, buildings, ports, subways, tunnels, or social infrastructure.

An electric device is a device that is driven using electricity and may include a battery or motor to use electricity. Electric devices may typically be electric vehicles, drones, or robots, which are future industries, and may be various devices that use electricity, but are not limited to these.

Electrical installations, installations or devices include conductors. Some conductors are formed with insulators for insulation. An insulator prevents electricity or heat from passing through and can be formed around a conductor or at a connection point between conductors.

Insulators can undergo thermal decomposition or deterioration due to the heat of the conductor, can generate gas that is a sign of fire, and can generate various gases depending on the materials used by each manufacturer. Additionally, the gases generated by insulators may vary depending on the deterioration temperature and time.

The electrical fire prevention system 10 includes a display material 20 and a fire sign monitoring device 300. The display material 20 is formed at a set position of the conductor connection assembly 100, generates gas when exposed to heat from the conductor and displays fire signs, and has a lower melting point or thermal decomposition temperature than an insulator, so it can be used for early detection of fire signs. .

The insulator provides insulation for the conductor, and the display material 20 has a lower melting point or thermal decomposition temperature than the insulator. Insulators and display materials are thermally decomposed when exposed to heat from the conductor and generate gas indicating fire signs, so they are named fire sign display objects.

Figure 6 shows a fire sign prediction method according to an embodiment of the present invention, and the fire sign monitoring device 300 includes a monitoring unit 310, a prediction unit 320, and a response unit 330. The monitoring unit 310 detects gas generated from a fire symptom display target. The monitoring unit 310 detects gas generated from thermal decomposition of the display material, gas generated from thermal decomposition of the insulator, and ultrafine particles in which the gas undergoes a phase transformation upon contact with air or moisture.

Since the gas generated from the exposed material may be of low concentration, the gas generated from the insulator may be of low or high concentration, and the ultrafine particles may be of high concentration, the monitoring unit 310 may include a low concentration gas sensor and a high concentration gas sensor. .

The prediction unit 320 sets a plurality of standard concentrations and compares the measured gas concentration detected by the monitoring unit 310 with the plurality of standard concentrations to predict the level of fire signs by stage. The prediction unit 320 predicts the level of fire signs using the measured values detected by the monitoring unit 310, and can predict the level of fire signs by stage using the monitoring unit 310. The level of fire signs refers to the warning level of fire signs.

The prediction unit 320 can set a plurality of standard concentrations for gases that may be generated from a fire symptom display target according to the temperature of the conductor. Multiple standard concentrations are standard values for comparing the levels of fire signs at each stage.

The monitoring unit 310 detects the first target gas that can be generated from the display material 20 and the second target gas that can be generated from the insulator, and the prediction unit 320 predicts the initial level of fire signs by detecting the first target gas. This is possible, and by detecting the second target gas, it is possible to predict a level higher than the initial level of fire signs. The response unit 330 controls electrical equipment in response to the level of fire signs or provides notifications to a set manager terminal or management server.

The present invention can improve the selectivity of gas detection by including technology for detecting target gases such as surface gas, insulator gas, and ultrafine particles, and can further improve the prediction accuracy of fire signs by enabling discrimination of the level of fire signs. there is.

The fire sign monitoring device 300 may further include a case 340 housing the monitoring unit 310, the prediction unit 320, and the response unit 330. The prediction unit 320 and the corresponding unit 330 may be formed as one unit. The monitoring unit 310 and the prediction unit 320 may be manufactured as an integrated unit or may be manufactured as a separate unit.

The monitoring unit 310 may be equipped with a plurality of gas sensors to predict the level of fire signs by stage. The prediction unit 320 may correct an error in the gas concentration for a specific gas sensor or determine a malfunction of the specific gas sensor through comparison of the gas concentration for each gas sensor.

Figure 7 is a block diagram showing an electrical fire prevention system according to an embodiment of the present invention. The display material 20 is visually inspected by the manager of the electrical facility to find loose bolts/nuts (change in appearance of the display material) and odor. It is used for inspection (odor of gas generated by thermal decomposition of exposed material) and automatic inspection (detection of gas of exposed material).

The display material 20 does not contain a flame retardant that causes toxic gases harmful to the human body or corrosion of the conductor, so it is thermally decomposed before the insulator and can be used for early detection of fire signs.

The display material 20 can provide the manager with a prediction of loosening of the conductor connection assembly 100 based on changes in its appearance, and can provide the fire sign monitoring device 300 with a step-by-step determination of the level of the fire after the fire.

The present invention can prevent human and material damage by detecting fire before it occurs, and can improve the reliability of the inspection by providing complex inspection such as visual inspection, smell inspection, and automatic inspection.

The present invention can reduce installation or maintenance costs by covering a plurality of conductor connection points without the need to install the monitoring unit 310 for each phase, such as R, S, T, and N.

FIG. 8 shows a conductor connection assembly according to the first embodiment, and FIG. 9 shows a state in which the discharge ring is removed from the conductor connection assembly of FIG. 2. The conductor connection assembly 100 includes the body 110. The body 110 includes a nut 111 and a bolt 112. As shown in FIG. 2, the nut 111 may be manufactured in a state coupled to the bolt-shaped bolt 112 at the bottom, or may be manufactured in a separated state.

The nut 111 may have a thread formed on its inner peripheral surface, and the bolt 112 may have a thread formed on its outer peripheral surface. Nuts 111 and bolts 112 provide connections between conductors. The conductor connection assembly 100 is a variety of screws that can be tightened or loosened by a tightening means such as a wrench or driver, but is not limited to this.

The conductor connection assembly 100 includes a seating groove 120 and an expression ring 21. The seating groove 120 is formed in the form of a groove on the outer peripheral surface of the nut 110. The display ring 21 is formed in the seating groove 120. The display material 20 may be manufactured in the form of a display ring 21.

The discharge ring 21 can generate gas for displaying fire signs when it receives heat from the conductor through the nut 111, and contains gas of different components from the gas generated by deterioration of the insulator. The discharge ring 21 can be manufactured in the form of a ring or a strip, and can generate a target gas that is different from the gas generated by deterioration of the insulator.

The monitoring unit 310 includes a gas sensor for detecting gas generated from the discharge ring 21. The sensor unit 320 may include a temperature and humidity sensor for error correction of gas concentration.

The present invention generates a target gas with a different component from the gas generated by deterioration of the insulator through the display material 20, thereby improving the selectivity of the gas sensor for the target gas and accurately detecting signs of an electrical fire. You can find out.

A gas sensor is a device that detects a specific gas component contained in a gas and converts it into an appropriate electrical signal depending on its concentration. Gas sensors can be classified into electrochemical type, contact combustion type, semiconductor type, photoionization type, and infrared type depending on the operation method. Infrared gas sensors are called NDIR sensors.

The seating groove 120 may include an upper seating groove (120a) and a lower seating groove (120b), and the display ring 21 may include an upper display ring (21a) and a lower seating groove ( It may include a lower expression ring (21b) formed in 120b).

The upper discharge ring (21a) and the lower discharge ring (21b) may have different gases, odors, or melting points or thermal decomposition temperatures. The present invention can provide step-by-step discrimination of fire signs by varying the gas, odor, melting point, or thermal decomposition temperature generated from the upper discharge ring (21a) and the lower discharge ring (21b).

The upper display ring (21a) may be made of a material with a lower melting point or thermal decomposition temperature than the lower display ring (21b). In the present invention, when abnormal heat of the conductor occurs, deterioration may first occur in the upper display ring (21a). . The manager can visually observe the status of the two types of display rings (21) and determine the level of fire signs by stage. The upper display ring (21a) is the first display material, and the lower display ring (21b) is the second display material.

The first display material 21a and the second display material 21b are equipped with a visual inspection function to determine the level of fire signs based on mutual comparison. The manager can visually inspect the level of fire symptoms through mutual comparison between the first display material (21a) and the second display material (21b).

The upper expression ring (21a) and the lower expression ring (21b) may be made of materials with different odors, and in the present invention, when abnormal heat of the conductor occurs, an odor due to deterioration may first be generated in the upper expression ring (21a). there is. Workers can determine the level of fire signs by stage by observing what kind of smell it is through their sense of smell.

The upper discharge ring 21a and the lower discharge ring 21b may contain materials with different melting points and gas components, and the present invention can provide step-by-step discrimination of fire signs through the sensor unit 320.

The monitoring unit 310 may detect the first gas generated by thermal decomposition of the display material 20 and the second gas generated by thermal decomposition of the insulator. The first gas may be a gas generated from the display material 20 when heated at a temperature between the maximum allowable temperature of the insulator and the melting point of the insulator, and the second gas may be a gas generated from the insulator when heated at a temperature above the melting point of the insulator. It may be a gas that is generated.

Since the generation time of the first gas and the second gas varies depending on the temperature, the prediction unit 320 can determine the level of fire signs by stage based on the type or concentration of the gas.

FIG. 10 shows a conductor connection assembly according to a second embodiment of the present invention, and FIG. 11 shows the conductor connection assembly of FIG. 10 in a state separated from the fitting portion. The conductor connection assembly 100 is capsule-type. It includes an internal space 130, an odorant 22, a fitting groove 140, and a fitting portion 150.

The internal space 130 is formed inside the body 110, and the odorant 22 is formed in the internal space. The fitting groove 140 communicates with the internal space, and the fitting portion 150 is formed in the fitting groove 140.

The fitting portion 150 may be deteriorated due to heat of the conductor, and may be separated from the fitting groove 140 due to deterioration. When the fitting portion 150 is separated, the odorant 22 is released from the internal space 130 to the outside to display fire signs.

The odorant 22 may generate a gas different from the gas generated by deterioration of the insulator. The odorant 22 may cause pressure expansion due to the heat of the conductor, and may further promote separation of the fitting portion 150 due to the force of the expansion. The display material 20 may contain an odorant component that may generate odor when thermally decomposed, and may have insulating properties.

The conductor connection assembly 100 may further include elastic means 160 formed between the internal spaces 130 to promote separation of the fitting portion 150. The fitting portion 150 can be separated from the fitting groove 150 when it receives the heat of the conductor transmitted through the body 110 and the force of the elastic means 160.

The fitting portion 150 may be deformed by heat and may be separated from the fitting groove 150 by an elastic means 160 such as a spring. The present invention can provide a visual identification function through deformation or separation of the fitting portion 150. The manager can visually identify the fitting portion 150 as it is separated from the fitting groove 140. The fitting portion 150 may generate gas due to deterioration.

The present invention installs a conductor connection assembly formed at the connection point between conductors, which is the main cause of electrical fires, and provides a display ring (21) or a display material (20) for the odorant (22) to display fire signs on the conductor connection assembly. By forming, signs of electrical fire can be quickly detected through sensors or managers, and human/material damage caused by electrical fire can be prevented in advance. In addition, the present invention can improve the selectivity of the gas sensor by generating gas of a different component from the gas generated from the insulator through the display material 20.

In the present invention, the internal space 130 can be formed not only at the top but also at the bottom of the body 110, and can provide fire signs from both the top and bottom.

Figure 12 shows a conductor connection assembly according to a third embodiment of the present invention, and Figure 13 shows a state separated from the fuse-type display part in the conductor connection assembly of Figure 12. The conductor connection assembly 100 is a fuse. The shape includes a body 110, an internal space 130, an opening 170, and a fuse-type display portion 180.

The opening part 170 is formed at one end of the internal space 130, and the fuse-type display part 180 is inserted through the opening part 170 and is seated in the internal space 130. The internal space 130 may be formed in the upper part of the body 110 or in the lower part of the body 110, as shown in FIG. 6. In the present invention, the manufacture of the conductor connection assembly 100 can be completed by inserting the fuse-type display portion 180 into the internal space 130 in an atmosphere with the odorant 22, which is one of the display materials 20. .

The fuse-type display unit 180 includes an upper member 181, a lower member 182, a core wire 183, an elastic means 160, and an odorant 22. The upper member 181 is used to close the opening, the lower member 182 is formed at the other end of the internal space 130, and the core wire 183 connects the upper member 181 and the lower member 182.

The upper member 181, lower member 182, and core wire 183 may be made of the same material, and the upper member 181 and lower member 182 may be thicker than the core wire 183. The upper member 181 and lower member 182 may be made of a different material than the core wire 183, and the upper member 181 and lower member 182 may have a higher melting point or strength than the core wire 183.

The elastic means 160 surrounds the core wire 183 and is located between the upper member 181 and the lower member 182 to maintain the contracted state. When the core wire 183 is broken by the heat of the conductor, it returns to its original state. is expanded to At this time, the upper member 181 is separated by the expansion force of the elastic means 160, and the odorant 22 is discharged from the internal space 130 to the outside through the opening 170. The odorant 22 may exist in the space between the elastic means 160 and the core wire 183 before the core wire 183 is broken.

The present invention is very simple to manufacture by machining a groove to form an internal space 130 in the conductor connection assembly 100 and inserting a fuse-type display portion 180 manufactured in a set form into the groove. Time can be shortened. The present invention can easily provide maintenance by replacing the fuse-type display unit 180.

FIG. 14 shows a conductor connection assembly according to a fourth embodiment of the present invention, and an internal space 130 may be formed penetrating the upper and lower portions of the body 110 of the conductor connection assembly 100.

The fuse-type display unit 180 may further include an insertion tube 184 surrounding the upper member 181 and the lower member 182. An odorant 22 is formed inside the insertion tube 184. In the present invention, the fuse-type display part 180 of the finished product can be inserted into the internal space 130. In the present invention, when the core wire 183 is broken, the upper member 181 or the lower member 182 may be separated and the odorant 22 may be released from the upper or lower part of the body 110. The operator can easily visually identify whether signs of fire have occurred by observing the upper and lower sides of the conductor connection assembly 100.

In the present invention, manufacturing is very simple and manufacturing process time can be shortened by inserting the fuse-type display portion 180 of the finished product. The present invention can easily provide maintenance by replacing the fuse-type display unit 180.

The battery contains an electrolyte and may contain lithium hexafluoride phosphate, which may generate hydrogen fluoride (HF) when thermal runaway occurs. Additionally, the battery may include an insulator to surround the cell, and gas may be generated by thermal decomposition of the insulator due to thermal runaway.

Batteries may include a circuit that monitors overcharge, and early detection of abnormal signs may be difficult due to circuit failure. The battery may include bus bars for transmitting electricity, and the conductor connection assembly 100 may become loose at the connection between the bus bars.

The monitoring unit 310 is capable of detecting gas generated by thermal decomposition of the display material by receiving heat from the gas and conductor generated by the temperature increase of the battery storing electricity. The present invention can use the monitoring unit 310 to detect signs of battery explosion in advance by using the battery and the display material 20 together.

Conventionally, when a bolt/nut becomes loose, a pen is used to mark the bolt/nut and the bolt/nut is tightened again. However, conventionally, it is impossible to know whether loosening is due to a defective bolt/nut or loosening due to contraction/relaxation.

Conventionally, if loosening is caused by contraction/relaxation, such as heat of the conductor, it can be solved by re-tightening the bolt/nut. However, if loosening is due to a defect in the bolt/nut, the problem of repeated loosening occurs even after re-tightening, and the manager has to frequently tighten the pen. This causes the inconvenience of marking, and it is difficult to find out how many times marking was done.

The display material 20 may have a color indicating the number of replacements of the conductor connection assembly 100 in the connection between conductors. For example, if the display material 20 is yellow, it means that it was installed for the first time, if it is blue, it means that it has been replaced once, and if it is red, it means that it has been replaced twice. The number of replacements according to color can be arbitrarily set by the administrator, but is not limited to this.

Odorants are materials used in the city gas industry to detect signs of gas leaks. They generally contain sulfur components that cause corrosion of conductors, and gas pipes are coated to prevent corrosion of conductors.

The expressed material may include a sulfur-free odorant without sulfur. Sulfur-free odorants enhance the strength and physical properties of synthetic resins, are not harmful to the human body, and have low corrosiveness of metals. The present invention generates an odor during the combustion process through a sulfur-free odorant, allowing workers to detect signs of an electrical fire through the sense of smell, and generates hydrocarbon-based gas to improve the selectivity of the monitoring unit 310. The appearance of the insulation material changes due to evaporation, allowing workers to visually detect signs of an electrical fire.

The sulfur-free odorant may be isovaleraldehyde or acrylate. Isovaleraldehyde is available naturally from over 180 plant species, including foods such as bananas, apples, carrots, cacao, and coffee. Isovarealdehyde is a substance used in the manufacture of amino acids, antiviral protection, central nervous system disease drugs, or as an excipient.

Acrylates do not contain sulfur and may emit a characteristic odor. Acrylates can be classified into methyl, ethyl, butyl, 2-ethylhexyl acrylate, acrylic acid, and methyl methacrylate. Acrylates have transparency, UV stability, elongation, solvent resistance, and water resistance, so they are used in a variety of applications such as paints, fibers, adhesives, coatings, or inks. In particular, methyl acrylate forms a copolymer with acrylic ester monomers and provides the function of strengthening the strength and physical properties of synthetic resins. Sulfur-free odorants may include alkyl isovalate, which is an ester-based organic compound, and alkyl acrylate or alkyl pyrazine, which are acrylic organic compounds.

The display material 20 may include a thermochromic polymer composed of carbon and hydrogen atoms. Thermochromic polymers that provide color change by heat can be named thermochromic layers. The thermochromic layer is intended to solve the problems of conventional color-changing pigments.

Thermochromic polymers are generally used to manufacture biosensors. The main ingredient is polydiacetylene, and by introducing peptide side chains into the polymer, it can provide a very rapid color change up to 200°C. When the thermochromic polymer 120 is subjected to heat above 200°C, it is irreversibly damaged and no longer has thermochromic properties. The thermochromic polymer 120 can provide color changes under various temperature conditions in response to the amount of polydiacetylene. Polydiacetylene has the molecular formula C ₄ H ₂ and is composed of hydrogen and carbon atoms, and can generate hydrocarbon-based gas when heated above the ignition temperature. Thermochromic polymers have a wider temperature range for color change than color change pigments, and can range between the temperature at which deterioration of the insulator occurs and the temperature at which complete combustion occurs. The thermochromic polymer is composed of hydrogen and carbon atoms and can minimize the emission of gases related to corrosion of the conductor during incomplete combustion and improve the selectivity of the monitoring unit 310 that detects hydrocarbon-based target gas.

Thermochromic polymers are composed of carbon and hydrogen atoms and can generate hydrocarbon-based target gas during incomplete combustion. The odorant is also composed of carbon, hydrogen, and oxygen atoms and can generate hydrocarbon-based target gas during incomplete combustion.

Figure 15 is a cross-sectional view showing a fire sign gas measuring device of a switchboard model according to an embodiment of the present invention. In order to test the performance of the display material 20 or a gas sensor, a fire sign gas measuring device 500 of an electrical facility model is used. ) is required.

The fire sign gas measuring device 500 includes a chamber 510, a heating unit 540, a temperature measuring unit 570, and a gas measuring unit 580. The chamber 510 has a switchboard model and is used to place the fire symptom display object formed in the conductor portion 30. The target of fire signs is the insulator or the display material. The chamber 510 is used to place inside the display material formed at a set position of the conductor connection assembly 100 that provides connection between the conductor portions 30.

The heating unit heats the conductor unit 30, and the temperature measurement unit 570 measures the temperature of the conductor unit 30. The temperature measuring unit 570 is typically a thermoelectric element.

The gas measuring unit 580 measures the concentration of gas generated from the fire symptom display target by the heat of the conductor unit 30. The gas measuring unit 580 may be the monitoring unit 310 of the fire sign monitoring device 300.

The data measured in the temperature measurement unit 570 and the gas measurement unit 580 are used as standards for producing fire symptom display objects, performance testing of the gas measurement unit 580 or monitoring unit 310, and determining the level of fire signs. It can be used as at least one of the selection of concentrations.

The fire sign gas measuring device 500 may further include a control unit 590. The control unit 590 can communicate with the heating unit 140, the temperature measuring unit 570, and the gas measuring unit 580 by wire or wirelessly. Wireless communication may be Bluetooth, Wi-Fi, infrared, or sensor network communication, and may be a variety of communications, but is not limited thereto.

The fire sign gas measuring device 500 may further include an intake unit 551 and an exhaust unit 552. The intake unit 551 is formed at the bottom of the chamber 510 to suck fresh air into the chamber 510, and the exhaust unit 552 is formed at the top of the chamber 510 to take the air inside the chamber 510 to the outside. discharge. The intake unit 551 and exhaust unit 552 are operated immediately before or after the test through control of the control unit 590.

In the present invention, the display material 20 has a lower melting point or thermal decomposition temperature than the insulator, so it can be used for early detection of fire signs and for determining the level of fire signs by stage, and the display material 20 is formed in the conductor connection assembly 100 to change the external appearance. The change can be used to predict loosening of the conductor connection assembly 100.

The present invention detects the gas generated from the display material 20 and the insulator to predict the level of fire signs by stage, and controls the electrical equipment in response to the level of the fire sign or provides notification to a set manager terminal to manage the electrical facilities. Electrical fires can be prevented.

The present invention uses data measuring the temperature of the conductor part 30 and data measuring the gas generated from the fire symptom display object to produce a fire symptom display object, and to use the gas measurement unit 580 or the monitoring unit 310. It can be used as at least one of performance tests and selection of reference values to determine the level of fire signs.

By developing an eco-friendly display material 20 without a flame retardant, the present invention can provide a display material 20 that thermally decomposes before the insulator, and can solve problems such as corrosion of conductors caused by flame retardants or harmful to the human body.

The present invention develops a display material 20 in which thermal decomposition occurs earlier than the insulator, thereby detecting fire signs early and further improving the accuracy of predicting fire signs.

The present invention develops a technology for forming the display material 20 in the conductor connection assembly 100, which is essential for connection between conductors, so that, unlike the prior art, there is no need for separate elements for fire sign monitoring at each connection point between conductors, thereby reducing costs. A savings effect can be achieved, and human/material damage can be prevented in advance by quickly finding and tightening loose bolts/nuts through visual inspection of the display material (20).

The present invention can improve the reliability of the inspection by providing automatic inspection using the monitoring unit 310, visual inspection based on changes in the external appearance of the display material 20, and odor inspection based on the gas odor of the display material 20. there is.

As described above, the monitoring unit 310 can detect gas generated by thermal decomposition of insulators for insulating conductors such as wires, tubes, and terminal blocks, and detects gas generated by abnormalities in circuit boards, diodes, and electronic components that can generate heat. It can be detected.

The prediction unit 320 can predict the level of fire signs by comparing the gas concentration generated due to overcurrent, poor conductor connection, or abnormality of electronic components with a reference value.

10: System 20: Expression material
21: display ring 21a: first display ring
21b: second expression ring 22: odorant
100: Conductor connection assembly 110: Body
111: nut 112: bolt
120: Seating groove 120a: First seating groove
120b: Second seating groove 130: Internal space
140: Fitting groove 150: Fitting portion
160: elastic means 170: opening part
180: Fuse-type display unit 181: Upper member
182: lower member 183: core wire
184: Insertion tube 310: Monitoring unit
320: prediction unit 330: response unit
340: Case 500: Fire sign gas measuring device
510: Chamber 540: Heating unit
551: intake section 552: exhaust section
570: Temperature measurement unit 580: Gas measurement unit
590: Control unit

Claims (1)

body 110;
Odorant 200 formed in the internal space 130 of the body;
An opening 170 formed at one end of the internal space;
A member (150 or 181) that closes the opening but can escape from the opening when exposed to heat from the conductor, and
It includes elastic means 160 formed in the internal space to promote separation,
A conductor connection assembly containing an odorant, characterized in that the odorant is capable of releasing gas from the internal space to the outside by means of heat and elasticity of the conductor.