JPH10174245A - Cable extensive burning inhibiter peeling device, and peeling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the rehardening of an extensive burning inhibiter by arranging a plurality of temperature sensors and a flexible sheet heater which are provided with a plurality of heating parts corresponding to these several temperature sensors, on the irregular surface of a solidified extensive burning inhibiter applied on a cable, and performing the temperature control individually for each heating part. SOLUTION: A plurality of temperature sensors 4 are arranged on the surface of an extensive burning inhibiter 3 applied and solidified on the cable 2 laid on a cable tray 1, and the surface of the extensive burning inhibiter 3 is covered with a sheet-shaped and flexible sheet heater 6 provided with a plurality of heating parts 5 each forming a pair, corresponding to each of these temperature sensors 4. Then, the heat temperature is automatically adjusted by performing the adjustment or the on/off of the supply power from a power source 10 by an overheat temperature controller 12 equipped with a temperature measurer 8, a set temperature comparator 9, and a temperature controller 11. Hereby, even if there is irregularity on the surface of the extensive burning inhibiter 3, its solidification is prevented, maintaining the temperature of each part of the extensive burning inhibiter 3 always at a specified value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing the spread of fire spread after applying a fire prevention measure to a cable laid in a plant in various plants such as a nuclear power plant. The present invention relates to a device for removing a fire spread agent and a method for removing the same.

[0002]

2. Description of the Related Art Electric cables used in various plants such as nuclear power plants include non-flame-retardant cables and flame-retardant cables. Recently, flame-retardant cables have been widely used. Used non-flammable cables. Non-flame retardant cables that have been used before are coated with a fire spreader in a state of being laid on a cable tray or the like from the viewpoint of fire prevention.

[0003] This fire spread agent is generally based on an aqueous emulsion such as a polymer latex, and after being applied to a cable, solidifies by drying to protect the cable from flames. It is becoming sex.

[0004] The fire retardant applied to the cable is solidified together with the surrounding cables and together with the cable tray. Therefore, when the cable is to be laid or connection work is to be carried out at a later date. It is necessary to remove the fire retardant beforehand or to soften it to such an extent that it can be peeled off from the surrounding cable before separating the cable. That is, a general fire spread inhibitor has a property of being softened to some extent by a rise in temperature due to heating.

[0005] Therefore, the removal of the fire retardant after it has been applied to the cable and solidified is described in, for example, JP-A-63-3027.
No. 07 Publication `` Fireproof paint dismantling method '', or JP-A-8-7993
As disclosed in Japanese Patent Publication No. 1 “How to remove a cable from a cable tray”, a fire retardant (fire prevention paint) applied to the cable and solidified is heated by a sheet heater (a sheet heating element) or the like. Was softened.

[0006] The surface of the applied fire retardant is uneven due to the laying state of the cable to be laid. When the surface of the fire retardant is heated by a sheet heater, the surface of the fire retardant is removed. In order to enhance the heat transfer effect, it was necessary to make the sheet heater as close as possible to the fire retardant. Therefore, in the above disclosed technology, as a means for bringing the sheet heater into close contact with the fire spreader, a high water content sheet member impregnated with the sheet heater is interposed between the sheet heater and the sheet heater is made of a low water absorbing base material. I was

[0007]

Conventionally, as a means for bringing a sheet heater into close contact with a fire spreader having an uneven surface, water is interposed in a highly water-containing sheet. When the fire retardant softens, water mixes with the fire spread inhibitor. The water spread and the spread of the fire retardant softened due to the increase in the volume, the removal and disposal amount increased, and the removal of the fire retardant dissolved in the hands of the workers caused a large amount of removal treatment, which made the removal process cumbersome and reduced workability. There was inferior trouble.

Further, the temperature control of the heating element such as a seat heater is a direct self-control type in which the specific resistance of the heating element increases due to an increase in the temperature of the heating element itself. Due to the heat received by the cable under the inhibitor, there has been a concern that the deterioration of the insulator may be accelerated due to the temperature rise of the cable.

Generally, as a property of an anti-spreading agent, it softens easily when the temperature is increased by heating, but tends to solidify again in a relatively short time when the heating is stopped and left. However, as one advantage of the prior art, the softened state due to the mixture of the fire retardant with water did not immediately solidify even if the heating was stopped and left as it was. Therefore, it was possible to heat a relatively long distance at a time to soften it, and to remove the fire spreader for a relatively long distance while the solidification was delayed.

However, as disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 8-79931, when heating is directly performed by a heating element without containing a fire spread preventing agent, the fire spread preventing agent at uneven portions is not affected. Due to poor heat transfer, peeling was not possible due to softening over the entire surface. In addition to this, when the heating by the heating element is stopped even in a flat place, the fire spreader solidifies again in a short time, and thus the fire spreader over a long distance is peeled and removed by a single heating. It was difficult and the work efficiency was low.

It is an object of the present invention to prevent the uneven fire retardant from hardening again without intervening water by means of a highly water-containing sheet, and furthermore, to prevent the insulation from deteriorating due to an increase in the temperature of the cable. An object of the present invention is to provide an apparatus and a method for peeling off a cable spreader which does not affect the fire.

[0012]

According to a first aspect of the present invention, there is provided a cable spreader for peeling off a fire spreader which is applied to a cable laid on a cable tray and solidified. A plurality of temperature sensors, a flexible sheet heater provided with a plurality of heat generating units corresponding to the respective temperature sensors, a temperature measuring unit for measuring the respective unit temperatures from the temperature signals of the respective temperature sensors, and the respective unit temperatures. A set temperature comparing section for comparing and monitoring with a set value; and a temperature control section for controlling the temperature of each heat generating section by individually adjusting or disconnecting the power supply to each heat generating section from the monitoring result in the set temperature comparing section. And a heating temperature control device.

The fire spreader solidified on the cable laid on the cable tray is softened by being heated by the heat generating portion of a flexible sheet heater divided into a plurality of portions, and the softened state is as described above. A temperature sensor and a heating temperature control device that are arranged for each heat-generating unit individually adjust the supply power to each heat-generating unit to increase or decrease or disconnect the temperature, so that the temperature can always be easily separated from the cable. Is done.

According to a second aspect of the present invention, in the flexible sheet heater provided with a plurality of heat-generating portions, the heat-generating portions are formed in a strip shape by making a cut in the vertical direction integrally on one side. In addition, the strip-shaped heat generating portion is formed in a comb shape by making a plurality of cuts in the perpendicular direction. The plurality of heat generating portions provided on the flexible sheet heater are each formed in a strip shape, and each heat generating portion is further subdivided into a comb shape, so that the uneven surface of the fire spread preventing agent can be easily formed. Adhere and heat with good heat transfer.

According to a third aspect of the present invention, in the flexible sheet heater provided with a plurality of heat-generating portions, each of the cuts formed in one side, the cut in the vertical direction, and the cut in the perpendicular direction are provided. A plastically deformable wire is provided along which the shape of the seat heater is freely deformed to maintain this state.

The plastic deformation wire provided along one side of the flexible sheet heater and each of the heat-generating portions formed in the shape of a strip and the teeth of the comb-like comb provides the sheet heater and the heat-generating portion on the surface of the fire spread preventing agent. Due to the pressure contact, it is deformed similarly to the seat heater and the heat generating portion. Since this deformed state is a plastic deformation that is not restored even if the pressure contact is released unless it is changed to another shape by pressing again, the sheet heater and the heat generating portion maintain the close contact state with the surface of the fire spread preventing agent by the plastic deformed wire. Thus, heat can be heated with good heat transfer.

According to a fourth aspect of the present invention, in the flexible sheet heater provided with a plurality of heat generating portions, each of the cable spreaders is provided between a temperature sensor disposed on the surface of the spreader and the sheet heater. A heat transfer pillow excellent in heat transferability and adhesion is inserted for each heat generating portion, and a weight is disposed on each heat generating portion.

Even if the surface of the fire retardant has irregularities, the heat transfer pillow interposed between the sheet heater and the heat transfer pillow has the unevenness of the surface of the fire retardant and the temperature sensor due to the weight of the heat transfer pillow. On the other hand, it adapts its shape and adheres easily, and also adheres closely to the heat-generating portion of the sheet heater provided on the opposite side of the fire spread inhibitor. Due to the improvement of the heat transfer efficiency due to the close contact, the heating of the fire spread preventing agent by the heat generating portion of the seat heater and the temperature detection by the temperature sensor are efficiently performed.

According to a fifth aspect of the present invention, in the flexible sheet heater provided with a plurality of heat-generating portions, the cable-spreading agent peeling device is provided with a plurality of heat-generating portions. A switch for cutting off the supplied power by bending the heat-generating portion is provided at the base of.

A switch provided at the base of each of the plurality of heat generating portions provided in the flexible sheet heater at the base of the strip-like cut is formed by bending the heat generating portion at the work location at the start of the peeling operation. As a result, the power supply to the heat generating unit stops. Therefore, the workability at the work place is improved during the peeling operation, and the re-solidification of the fire retardant in the work place and another part is prevented due to the effect of the stoppage of the heating at the work place. Work becomes easier.

According to a sixth aspect of the present invention, there is provided a cable spreader for removing a fire spreader, comprising: a plurality of temperature sensors disposed on a surface of a fire spreader which is applied to a cable laid on a cable tray or a conduit and solidified; A heating element that is heated by thermal radiation provided facing the temperature sensor, a heat-resistant reflective sheet that surrounds the heating element together with the cable tray or the conduit and a wall penetration, and a temperature of each section from a temperature signal of each temperature sensor. The temperature at each heating element by individually adjusting or cutting off the supply power to each heating element from the monitoring result at the temperature measuring section to be measured and the set temperature comparing section for comparing and monitoring the temperature of each section with a set value and the monitoring result at the set temperature comparing section And a heating temperature control device having a temperature control unit for performing control.

The fire spread agent solidified in the cable tray or the conduit tube and the cable laid in the through-wall portion is covered with a heat-resistant reflective sheet, and is exposed to infrared rays emitted from a plurality of heating elements provided inside. Since the fire spread preventing agent is heated and softened in a non-contact manner irrespective of the irregular shape of the surface of the fire spread preventing agent, it can be easily separated from the cable and removed.

The temperature of the fire spread preventing agent is detected by a plurality of temperature sensors disposed on the surface, and controlled by a heating temperature control device for each of the heating elements disposed opposite to the temperature sensors. Is maintained in a softened state where it can be easily peeled off.

According to a seventh aspect of the present invention, there is provided a cable spreader for removing a fire spreader, a plurality of temperature sensors disposed on a surface of a fire spreader which is applied to a cable laid on a cable tray and solidified, A heating box provided with a heating element that is heated by heat radiation arranged facing the sensor,
Adjustment of the power supply to each heating element from the monitoring result in the temperature measurement unit that measures each part temperature from the temperature signal of each of the temperature sensors and the set temperature comparison unit and the set temperature comparison unit that compares and monitors the temperature of each part with a set value or The heating temperature control device is provided with a temperature control unit that performs temperature control in each heating element by individually connecting and disconnecting.

By arranging a plurality of heating boxes provided with heating elements on a fire spreader solidified in a cable, a plurality of heating boxes are provided in a non-contact manner with the fire spreaders by heat radiation from the heating elements. Perform heating.

The temperature of the fire retardant heated by the heating elements is detected by a plurality of temperature sensors disposed on the surface, and each of the heating elements disposed opposite to the temperature sensors is individually heated by a heating temperature control device. To maintain the anti-fire agent in a softened state that is easy to peel from the cable. The heating box is successively transferred to an unheated portion of the fire spread preventing agent in accordance with the progress of the fire spread preventing agent, whereby a continuous peeling operation can be performed.

[0027] According to an eighth aspect of the present invention, in the cable spreader removing device, the heating element disposed to face the temperature sensor is a heating element heated by convection.

By using the heating element heated by convection, the fire spread agent solidified in the cable tray or the conduit tube and the cable laid in the through-wall portion is heated in a non-contact manner by the convection of heat and softened. The softened state of the fire spreader is controlled by a temperature sensor and a heating temperature controller to control the heat generated by the heating element for heating the fire spreader, so that the fire spreader is kept in a softened state that can be easily separated from the cable. .

According to a ninth aspect of the present invention, there is provided a method for peeling a cable fire spreader, wherein the cable spreader is applied to and solidified on the cable tray or the conduit and the cable laid on the through-wall portion in the cable spreader. While monitoring the temperature of each part detected by each temperature sensor disposed on the surface of the prevention agent with a heating temperature control device, the extent to which the fire spread prevention agent applied to the cable and solidified can be peeled off without adversely affecting the cable. It is characterized by being heated to soften and removed.

The spread of the fire spread agent, which is applied to the cable laid on the cable tray or the conduit and solidified, is heated from the surface by a sheet heater or a heating element that generates heat radiation or heat convection, and is separated from the cable. And softened to facilitate removal. The state of softening due to this heating is
The heating temperature controller controls the increase / decrease or cutoff of the power supplied to each heating element arranged opposite to each temperature sensor, so that an appropriate state is always maintained.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. Note that the same components as those of the above-described related art are denoted by the same reference numerals, and detailed description thereof will be omitted. The first embodiment relates to claims 1 and 9,
As shown in the block diagram of FIG. 1 and the vertical sectional view of FIG. 2, in the cable spreader, the surface of the fire spreader 3 applied to the cable 2 laid on the cable tray 1 and solidified is applied to the cable tray 1. A plurality of temperature sensors 4 are arranged.

Each of the temperature sensors 4 is provided with a pair of a plurality of heat generating portions 5 corresponding to the respective temperature sensors 4. The surface of the fire spread inhibitor 3 is covered. Although the number of sheet heaters 6 is described as two here,
Regarding the number of the sheet heaters 6,
It is appropriately selected according to the area of the single body and the surface area of the fire spread preventing agent 3 to be peeled off in the cable tray 1.

The heat generating portion 5 is a surface heat generating member which lays a heating wire 7 such as a nichrome wire or the like which is heated by energization or is formed of a conductive resistor to generate heat as a whole by energization. If the heating wire 7 is a coated nichrome wire, the seat heater 6 does not need to be an insulator.

Further, a temperature measuring section 8 for measuring the temperature of each section from the temperature signal of each temperature sensor 4, a set temperature comparing section 9 for comparing and monitoring the temperature of each section with a set value, and a monitoring section for the set temperature comparing section 9 From the results, a heating temperature control device 12 including a temperature control unit 11 for controlling the temperature of each heat generating unit 5 by individually adjusting or disconnecting the power supplied from the power supply 10 to each heat generating unit 5. (Claim 1).

Next, the operation of the above configuration will be described. As shown in FIG. 2, a fire spread inhibitor 3 is applied and solidified on a large number of cables 2 laid in a cable tray 1.

On the surface of the anti-spreading agent 3, a portion corresponding to the cable 2 to be pulled out from the cable tray 1 or subjected to connection change or the like is disposed at intervals corresponding to the heat generating portion 5 of the sheet heater 6. The temperature sensor 4 is arranged at a location. In addition, each of these temperature sensors 4
It is connected to the temperature measuring unit 8 of the heating temperature controller 12 and outputs a temperature signal to the temperature measuring unit 8.

Further, the fire spread preventing agent 3 in the cable tray 1
The sheet heater 6 is arranged from above the temperature sensor 4 such that the heat generating units 5 are in close contact with each other, and each of the heat generating units 5 is connected to the temperature control unit 11 of the heating temperature control device 12. As a result, the power from the power supply 10 is supplied to the respective heat generating units 5 from the temperature control unit 11 by appropriately adjusting the voltage or the current, and the heat spread of the heat generating units 5 heats the fire spread preventing agent 3.

The temperature of the anti-spreading agent 3 heated by each of the heat generating parts 5 is detected by a temperature sensor 4 disposed in each of them, and a temperature signal from each temperature sensor 4 is a temperature signal of the heating temperature controller 12. The temperature is measured by the measuring unit 8, and the set temperature comparing unit 9 performs monitoring by comparing the temperature with a preset set value.

If the temperature of the fire spreader 3 corresponding to each temperature sensor 4 rises outside a predetermined allowable range with respect to the set value, the temperature control unit 11 generates 5, the voltage or current of the supplied power is reduced or stopped, so that the temperature of the fire spread preventing agent 3 decreases with time.

When the temperature of the fire spreader 3 falls outside a predetermined allowable range with respect to the set value, the temperature control unit 11 sends the voltage of the supplied power to the heating unit 5 corresponding to the temperature sensor 4. Alternatively, since the current is increased or the current is supplied, the fire spread preventing agent 3 is heated by the heat generating portion 5 to increase the temperature.

As a result, in the fire spread preventing agent 3, since the heat generation temperature is automatically adjusted for each heat generating portion 5, the temperature on the surface of the fire spread preventing agent 3 is controlled within a predetermined allowable range with respect to the set value. Therefore, the temperature of the fire spread preventing agent 3 can always be maintained near a predetermined value.

In order to remove the fire spread inhibitor 3,
It is necessary to easily separate the cable 2 and the cable tray 1 from each other. Therefore, the set value of the temperature preset in the set temperature comparing section 9 is a temperature that does not adversely affect the cable 2 such as accelerating the deterioration of the insulation coating, and furthermore, the fire retardant 3 can be easily removed from the cable 2 or the like. It is a value that can be softened to such an extent that it can be removed, and is determined in consideration of the properties of the fire spreader 3 together with the cable 2 (claim 9).

Thus, even if the surface of the fire spreader 3 applied to the upper part of the cable 2 and solidified is uneven due to the laying state of the lower cable 2, the flexible sheet heater 6
The heating portions 5 are heated at a temperature set in consideration of the protection of the cable 2 and the softening property of the fire spreader 3 by the heating portions 5 arranged at a plurality of locations. Therefore, the portion to be heated by the fire spread preventing agent 3 can be softened without causing a difference in the surface temperature. For this reason, it is easy to continuously carry out peeling and removal of the fire spread preventing agent 3 softened by the sheet heater 6, and work can be performed over a long distance with high work efficiency.

When the peeling operation is interrupted from the process of the operation, even if the heating by the sheet heater 6 is left as it is for a long time, the temperature control is automatically performed. Does not overheat or resolidify.
As a result, it is possible to always maintain a state in which the peeling operation can be restarted, and the excessive temperature rise does not adversely affect the lower cable 2 such as accelerating the deterioration of the insulation coating. And the burden on workers is reduced.

Further, since water is not used when softening the heat spreader 3 by heating, water is not mixed into the softened fire spreader 3 so that the volume does not increase. The amount of pod disposal is small.

The second embodiment relates to the first, second, fifth, and ninth aspects of the present invention, and improves the adhesion and workability of the sheet heater to the fire spreader. In addition,
The description of the same components and operations as those in the first embodiment will be omitted, and different portions will be mainly described.

As shown in the plan view of the main part of FIG. 3 and the vertical sectional view of FIG. 4, in the cable spreader, the plurality of temperature sensors 4 are arranged on the surface of the fire spreader 3 in the cable tray 1. At the same time, a pair of sheet-shaped and flexible sheet heaters 14 made of a heat-resistant insulating material provided with a plurality of heat-generating parts 13 corresponding to the respective temperature sensors 4 are provided. Cover the surface.

A plurality of heat generating portions provided in the seat heater 14
13 is a sheet heater 14 with one side integrated, and this one side
A cut 16 is made in the vertical direction with respect to 15, and each heat generating portion 13 is formed in a strip shape, and the rectangular heat generating portion 13 is formed in a comb shape by making a plurality of cuts 17 in a perpendicular direction. (Claim 2). The comb teeth 18 of each heating portion 13 are provided with the heating wire 7 or are formed entirely of a surface heating element made of a conductive resistor.

Further, the sheet heater 14 is closed at the base of the vertical cut 16 at the outlet of the heating wire 7 in each heat generating portion 13 when the sheet heater 14 is laid on the surface of the fire spreader 3, and the heat is generated. A switch 20 that opens by bending and raising the part 13 as shown by an arrow 19 to cut off the supply power
(Claim 5). A heating temperature control device 12 (not shown) similar to that of the first embodiment is connected to each of the heat generating portions 13 and the temperature sensor 4 of the seat heater 14 (claim 1).

Next, the operation of the above configuration will be described. Since the sheet heater 14 is formed by continuously forming a plurality of heat generating portions 13 in a strip shape, and each of the heat generating portions 13 is formed into a comb shape and constituted by a large number of thin comb teeth 18, the heat generating portion 13 has an integral shape. The sheet is extremely flexible as compared with the sheet No.

Therefore, as shown in FIG. 4, depending on the state of the cable 2 laid in the cable tray 1, the surface of the uneven fire spreader 3 and the shape of the temperature sensor 4 disposed thereon are adapted. As a result, the heat generating portion 13 can be easily deformed and brought into close contact with each other. As a result, the heat transfer from the sheet heater 14 to the fire spreader 3 is improved, so that the heating efficiency of the fire spreader 3 and the accuracy of the temperature control by the heating temperature controller 12 from the temperature detection by the temperature sensor 4 are improved.

As shown in FIG. 3, the sheet heater 14 is provided with a switch 20 capable of cutting off the supply of electric power to the outlet of the heating wire 7 for each of the heat generating portions 13. When it is laid on the surface of the fire preventive agent 3 and is flat, the switch 20 automatically closes and the heat spreader 13 heats and softens the fire spread preventive agent 3.

However, with the softening of the fire spread inhibitor 3,
When the operator peels off the surface of the cable 2 and bends the heat generating portion 13 as shown by an arrow 19 and raises it,
Since the switch 20 automatically shuts off the power supply to the heat generating unit 13, the temperature control by the heating temperature controller 12 stops.

Accordingly, the worker bends and raises only the heat-generating portion 13 at the peeling work point in accordance with the progress of the peeling operation of the fire spread preventing agent 3 on the cable tray 1, so that the softened fire spread preventing agent 3 at the work place concerned is bent. Is exposed,
The removal of the temperature sensor 4 and the removal of the fire spread preventing agent 3 can be easily performed.

Further, the heat-generating portions 13 other than the heat-generating portion 13 for performing the stripping operation are formed in a plate shape without touching the operator, and the temperature control of the heating temperature control device 12 continues to prevent the spread of fire. The agent 3 is kept in a softened state to prevent re-hardening and to be in a standby state in which a peeling operation can be immediately performed.

The action including the temperature control by the heating temperature controller 12 in the outer cable spreader and the method of removing the spreader 3 are the same as those in the first embodiment. 3 is softened to such an extent that it can be easily separated from the cable 2 and then removed (claim 9).

The third embodiment relates to the first to third and ninth aspects and is directed to improve the adhesion of the sheet heater to the fire spreader. The description of the same components and operations as those in the first and second embodiments will be omitted, and different portions will be mainly described.

As shown in the plan view of the main part of FIG. 5, in the cable spreader, a plurality of temperature sensors 4 are arranged on the surface of the fire spreader 3 in the cable tray 1 and each of the temperature sensors 4. Corresponding to a pair,
The spread-of-fire preventing agent 3 is provided by two sheet-like flexible heat-resistant insulating sheet heaters 22 provided with a plurality of heat generating portions 21.
(Claim 1).

A plurality of heat generating portions provided in the seat heater 22
Reference numeral 21 designates one side of the seat heater 22 as an integral unit,
A cut 16 is made in the vertical direction with respect to 15, and each heat generating portion 21 is formed in a strip shape, and the strip-shaped heat generating portion 21 is formed in a comb shape by making a plurality of cuts 17 in a perpendicular direction. (Claim 2).

In the seat heater 22, a comb-shaped heat generating portion 21 having an integral one side 15 and cuts made in the vertical direction and cuts made in the perpendicular direction is provided.
When the shape of 22 is freely deformed, a plastically deforming wire 23 for maintaining this shape is provided along with it (claim 3). The other configuration is the same as in the first and second embodiments.

Next, the operation of the above configuration will be described. The sheet heater 22 is provided with a plurality of heat generating portions 21 continuously in a strip shape, and each of the heat generating portions 21 is formed into a comb shape and is constituted by a large number of thin comb teeth portions 18, so that the heat generating portion 21 is an integrated sheet. It is extremely flexible compared to its shape.

Accordingly, one side 15 of the seat heater 22 is
A large number of strip-shaped and comb-shaped thin comb teeth 18 of the heating section 21
As shown in FIG. 4, the surface of the fire retardant 3
A seat heater is provided for the temperature sensor 4 disposed thereon.
The heat generating part 21 and the heat generating part 21 can be easily deformed and adhered flexibly.

Further, since the plastic deformation wire 23 is provided along the seat heater 22 and the heat generating portion 21, once the one side 15 of the seat heater 22 and the heat generating portion 21 are once
Is pressed against the uneven surface of the anti-spreading agent 3 and once brought into close contact with each other, the shapes of the sheet heater 22 and the heat generating portion 21 at this time are changed unless the operator retouches the plastic deformation wire 23.
Maintained by

As a result, the heat transfer from the sheet heater 22 to the fire spread preventing agent 3 becomes good, so that the heating efficiency of the fire spread preventing agent 3 and the efficiency of the temperature control by the heating temperature control device 12 are improved. Other functions and effects are the same as those in the first and second embodiments. The method for removing the fire spread inhibitor 3 is the same as in the first embodiment, and the fire spread agent 3 is softened to such an extent that it can be easily peeled off from the cable 2 and then removed (claim 9).

The fourth embodiment relates to the first, fourth and ninth aspects and is directed to improve the adhesion of the sheet heater to the fire spreader. The description of the same components and operations as in the first embodiment will be omitted, and different portions will be mainly described. As shown in the main part plan view of FIG. 6 and the vertical sectional view of FIG. 7, in the cable spreader, a plurality of temperature sensors 4 are arranged on the surface of the fire spreader 3 in the cable tray 1.

On each of the temperature sensors 4, a corresponding heat transfer pillow 24 having excellent heat transferability and adhesion is mounted. On each of the heat transfer pillows 24, a seat heater 6 is attached to each of the heat generating portions 5. Are arranged at positions corresponding to the temperature sensors 4 and overlapped,
A weight 25 is placed on each of the heat generating portions 5.

The heat transfer pillow 24 is formed by sealing a liquid such as water, which is excellent in heat transfer and fluidity, inside a flexible heat-resistant waterproof bag so that the outer shape conforms to the surrounding contact portion. It is formed easily. Accordingly, when the heat transfer pillow 24 is placed on the temperature sensor 4 and the fire spread preventing agent 3, the outer shape adapts along the uneven surface and is freely deformed, so that the heat transfer pillow 24 easily comes into close contact. Claim 4).

Next, the operation of the above configuration will be described. A plurality of temperature sensors 4 are arranged on the uneven surface of the anti-spreading agent 3 applied to the cable 2 in the cable tray 1 and solidified. As a result, the outer shape is adapted to easily adhere to the uneven surface of the temperature sensor 4 and the fire retardant 3 together with the heat generating portion 5 of the seat heater 6.

Therefore, the heat generated from each of the heat generating portions 5, which are in good contact with each other through the heat transfer pillow 24 having excellent heat transfer properties, is efficiently transmitted to the fire spread preventing agent 3, and the heat generated by the heat generating portions 5 The weight 25 placed on the top applies an appropriate load to the fire spread inhibitor 3 via the heat generating portion 5 and the heat transfer pillow 24.

As a result, due to the fluidity of the sealed liquid and the good heat transfer, the heat transfer pillow 24 is biased to the pressure-sensitive contact portion between the heat transfer pillow 24 and the fire spreader 3 and between the heat transfer pillow 24 and the heat generating portion 5. Without causing
Since the adhesive is uniformly adhered over substantially the entire surface, heat transfer between the heat generating portions 5 is high and the heating efficiency of the heat spreader 5 for the fire spread preventing agent 3 is high.

The functions and effects including the temperature control by the heating temperature controller 12 are the same as those in the first embodiment, and the method of removing the fire spreader 3 is also the same as that in the first embodiment. As in the embodiment, the fire spread inhibitor 3 is softened to such an extent that it can be easily peeled from the cable 2 and then removed (claim 9).

The fifth embodiment relates to claims 6 and 9 and relates to the separation of the fire spread preventing agent from the cable tray. As shown in the schematic diagram of FIG. 8, in the cable spreader, the plurality of temperature sensors 4 are arranged on the surface of the fire spreader 3 solidified on the cable 2 laid in the cable tray 1. .

Further, at a position facing each temperature sensor 4 together with the fire spread preventing agent 3 above the temperature sensor 4, for example, a heating element such as a heating lamp 26, which emits infrared rays or the like and is heated by heat radiation (radiation). Are mounted on the support base 27 toward the fire spread inhibitor 3.

The heating element to be heated by the heat radiation is not limited to the heating lamp 26, but may be an infrared heater or a far-infrared heater which emits a heat ray capable of heating the anti-spreading agent 3 by infrared rays or far-infrared rays. , Heating wire and sheathed heater, and microwave.

Further, the cable tray 1 and the heating element 26
Together with the support base 27, and surround the periphery with a heat-resistant reflective sheet 28 having flexibility and heat retention.
The heating bulb 26 is connected to the heating temperature control device 12 shown in the first embodiment (claim 6).

Next, the operation of the above configuration will be described. The anti-spreading agent 3 on the cable tray 1 on which the temperature sensor 4 is disposed is heated and softened by infrared rays or the like emitted by the heat generating lamp 26 which is a heat generating element attached to the support base 27.

Further, when the fire spread preventing agent 3 is heated, the periphery of the cable tray 1 and the heating element 26 is surrounded by the heat-resistant reflective sheet 28 having heat insulation, so that the heat is emitted from the heat generating lamp 26 toward the fire spread preventing agent 3. Infrared rays, etc.
Most of the heat reaches the heat-reflective sheet 28, but the temperature inside the heat-resistant reflective sheet 28 rises due to heat convection.

As for infrared rays and the like radiated by the heat generating lamp 26, the heat transfer loss in the air layer during the heat transfer is small, and the fire spread preventing agent 3 in the heated portion is effectively heated. Agent 3 is efficiently heated and softened. In addition, since heating is performed in a non-contact state, irregularities on the surface of the fire spread preventing agent 3, which is the surface to be heated, are allowed to some extent, and heating is facilitated.

As a result, the softened fire spreader 3 can be easily peeled off and removed, and the surroundings are surrounded by the heat-reflective sheet 28 having flexibility and heat retention.
Heating and heat retention of the fire spread inhibitor 3 can be performed efficiently. further,
When removing the fire spread preventing agent 3, the heating by each of the heat generating lamps 26 is sequentially stopped in accordance with the progress of the work, and the heat-resistant reflection sheet 28 of the portion of the fire spread preventing agent 3 is removed to remove the fire spread preventing agent 3. By doing so, re-solidification of the fire spread preventing agent 3 in the unstarted portion can be prevented, and efficient work can be performed.

The temperature control of the fire spread preventing agent 3 heated by the heat generating lamp 26 is performed by the heating temperature control device 12 in the same manner as in the first embodiment. In the same manner as in the first embodiment, the fire spread preventing agent 3 is softened to such an extent that it can be easily separated from the cable 2 and then removed (claim 9).

The sixth embodiment relates to claim 6 and claim 9 and relates to the peeling of the fire spread preventive agent in the conduit tube and the wall penetrating portion. As shown in the schematic diagram of FIG.
The fire spread agent 3 is solidified at the end of the conduit tube 29 in the cable 2 laid inside.

[0082] In the cable spreader,
A temperature sensor 4 is arranged on the cable 2 close to the fire spreader 3, and a heating lamp 26 of a heating element which is heated by heat radiation is disposed above the temperature sensor 4 toward the fire spreader 3. Along with the pipe 29 and the cable 2, the surroundings are covered with a heat-resistant reflective sheet 28 having flexibility and heat insulation. Further, the temperature sensor 4 and the heating lamp 26 are connected to the heating temperature control device 12 shown in the first embodiment (claim 6).

The operation of the above configuration is as follows.
In the same manner as in the embodiment, in a state where the periphery is covered with a heat-resistant reflective sheet 28, the fire spread preventing agent 3 at the end of the conduit tube 29 is heated by infrared rays or the like radiated by the heating lamp 26, and the heating temperature is the heating temperature. It is controlled by the control device 12.

When the fire spreader 3 is softened by heating, the heating by the heating lamp 26 is stopped and the heat-resistant reflection sheet is turned off.
After opening 28, the fire spreader 3 is stripped and removed from the cable 2 and the like. The method of peeling the fire spreader 3 is the same as in the first embodiment. After being softened to such an extent that it can be easily peeled off from the cable 2, it is removed (claim 9).

The above description is not limited to the peeling inside the conduit tube 29, and the temperature sensor for the fire spread preventing agent 3 is also applied to the conduit tube 29 protruding from a wall (not shown) or the wall penetrating portion such as the cable tray 1. The same applies to the case in which the heat spreader 4 and the heat generating lamp 26 are disposed, the periphery thereof is covered with a heat-resistant reflective sheet 28, and the fire spread agent 3 in the wall penetrating portion is peeled off by heat radiation of the heat generating lamp 26.

The seventh embodiment relates to the eighth and ninth aspects and relates to the release of a fire spread preventing agent from a cable tray, and is a modification of the fifth embodiment. Therefore,
The following description focuses on portions that are different from the fifth embodiment, and a description of the same portions is omitted.

As shown in the schematic diagram of FIG. 10, in the cable spreader, a plurality of temperature sensors 4 are attached to the surface of the spreader 3 solidified on the cable 2 laid in the cable tray 1. A plurality of hot air generators 30, which are heating elements for heating by thermal convection, are attached to the support base 27 toward the fire spreader 3 above the temperature sensor 4.

Further, the cable tray 1 and a hot air generator 30 as a heating element are combined with a support base 27, and the periphery thereof is surrounded by a heat-resistant reflective sheet 28 having flexibility and heat insulation. The generator 30 is connected to and configured with the heating temperature control device 12 shown in the first embodiment (claim 8).

The operation of the fifth embodiment is the same as that of the fifth embodiment except that the heating lamp 26 of the heating element is heated by heat radiation.
However, the difference is that a hot air generator 30 having a heating element for heating by forced heat convection is used. Accordingly, the temperature control performed by the heating temperature control device 12 includes controlling the amount of heat generated by a heating element such as a heating wire (not shown) in the hot air generator 30, controlling the amount of air in the blower, or controlling both the amount of heat and the amount of air. Are simultaneously controlled to heat the fire spread preventing agent 3.

The heating by the hot air generator 30 differs from the heating lamp 26 in that the hot air forcibly circulates through the interior surrounded by the heat-resistant reflection sheet 28. Not affected. Also, since the internal temperature can be increased almost uniformly,
Irrespective of the unevenness of the surface state of the fire spread preventing agent 3, there is a feature that heating is performed uniformly and temperature monitoring by the temperature sensor 4 is easy.

When the anti-fire spread agent 3 is heated and softened by the hot air, the heating by the hot air generator 30 is stopped, the heat-resistant reflection sheet 28 is opened, and the operation of peeling and removing the anti-fire spread agent 3 is performed. In the same manner as in the first embodiment, the flame retardant 3 is removed after softening the flame retardant 3 to such an extent that it can be easily peeled from the cable 2 (claim 9).

The eighth embodiment relates to claims 8 and 9 and is directed to the peeling of the fire spread preventive agent at the conduit and the through-wall portion, and is a modification of the above-described sixth embodiment. Therefore, the following description focuses on the parts different from the sixth embodiment, and the description of the same parts is omitted. As shown in the schematic diagram of FIG. 11, in the cable 2 laid in the conduit 29, the fire spread inhibitor 3 is solidified at the end of the conduit 29.

In the cable spreader peeling device,
The temperature sensor 4 is disposed on the cable 2 close to the fire spread agent 3, and a hot air generator 30 of a heating element which is heated by thermal convection is disposed above the temperature sensor 4 toward the fire spread agent 3. Together with the pipe 29 and the cable 2, the surroundings are covered with a heat-resistant reflective sheet 28 having flexibility and heat insulation. Also,
The temperature sensor 4 and the hot air generator 30 are connected to the heating temperature control device 12 shown in the first embodiment (claim 8).

The function of the above configuration is as follows. In contrast to the sixth embodiment in which the heating element uses the heating lamp 26, the hot air generator 30 is used. The temperature control is performed by controlling the amount of heat generated from a heating element (not shown) in the hot air generator 30, controlling the amount of air in the blower, or simultaneously controlling both the amount of heat generated and the amount of air to heat the anti-fire spread agent 3.

In the heating by the hot air generator 30, since the hot air is forced to circulate through the interior covered with the heat-resistant reflection sheet 28, the internal temperature can be increased substantially uniformly. The uniform heating of the inhibitor 3 and the temperature monitoring are easy.

Further, when the fire spread agent 3 is softened by the hot air, the heating by the hot air generator 30 is stopped, and the heat-resistant reflection sheet 28 is opened to carry out the work of peeling and removing the fire spread agent 3. Regarding the method of removing the agent 3,
In the same manner as in the first embodiment, the fire spread preventing agent 3 is softened to such an extent that it can be easily separated from the cable 2 and then removed (claim 9).

The ninth embodiment is directed to the seventh and ninth embodiments, and relates to the release of the fire spread preventing agent from the cable tray. As shown in the vertical sectional view of FIG. 12 (c), the cable tray 1
Fire spreader 3 solidified on the cable 2 laid inside
A plurality of temperature sensors 4 are arranged on the surface of the.

As shown in the vertical sectional view of FIG. 12 (a) and the plan view of FIG. 12 (b), on the upper surface of the inside of a heating box 31 provided with heat resistance and heat insulation with an open lower part, together with a reflector 32, A plurality of heating boxes 31 are arranged at positions corresponding to each of the temperature sensors 4 arranged on the surface of the fire spreader 3 as a pair. Install. Note that each of the heating lamps 26 and each of the temperature sensors 4 are connected to the heating temperature control device shown in the first embodiment.
It is configured to be connected to 12 (claim 7).

Next, the operation of the above configuration will be described. The anti-spreading agent 3 is heated and softened by infrared rays or the like radiated from the heat generating lamps 26 by the respective heating boxes 31 arranged corresponding to the temperature sensors 4. Further, the temperature of the fire spread preventing agent 3 for each heating box 31 is detected by each temperature sensor 4 and monitored by the heating temperature control device 12 as in the first embodiment, and supplied to the heating lamp 26. It is appropriately controlled by adjusting or disconnecting the electric power.

Therefore, for the fire spread prevention agent 3 solidified on the cable 2 laid in the cable tray 1, the heating boxes 31 are arranged together with the plurality of temperature sensors 4, and the softened state of the fire spread prevention agent 3 is provided. Then, the heating box 31 and the temperature sensor 4 are sequentially removed, and then the anti-fire spread agent 3 is removed and removed.

At the time of this peeling removal operation, only the heating box 31 and the temperature sensor 4 of the work target part are removed, and the other heating box is removed.
31 is installed in the fire spread preventing agent 3 in the unstarted portion, so that the fire spread preventing agent 3 in the unstarted portion is always softened without re-solidification due to interruption of the heating in the fire spread preventing agent 3 in the work target portion. The state is maintained.

Further, in accordance with the progress of the stripping and removing operation, the heating box 31 and the temperature sensor 4 removed from the work target part are sequentially installed on the flame spread preventing agent 3 in the unheated portion of the cable tray 1. This makes it possible to continuously remove and remove the solidified fire retardant 3 from the cable tray 1 over a long distance without increasing the number of heating boxes 31 used more than necessary.

The method for removing the fire spread preventing agent 3 is the same as in the first embodiment, and the fire spread preventing agent 3 is removed after being softened to such an extent that it can be easily peeled off from the cable 2 (claim 9). .

The tenth embodiment relates to claims 7, 8 and 9 and relates to the release of the fire spread preventing agent from the cable tray, and is a modification of the ninth embodiment. Therefore, the following description focuses on the parts different from the ninth embodiment, and the description of the same parts is omitted. As shown in the vertical sectional view of FIG. 13 (a) and the plan view of FIG. 13 (b), in the cable spreader, the lower surface of the heating box 33 having heat resistance and heat insulation with an open lower portion has A hot air generator 30, which is a heating element heated by thermal convection, is attached and configured.

As shown in the vertical sectional view of FIG. 13C, a plurality of the heating boxes 33 are arranged at positions corresponding to the respective temperature sensors 4 arranged on the surface of the fire spreader 3 as a pair.
Each of the hot air generators 30 and each of the temperature sensors 4 are connected to the heating temperature control device 12 shown in the first embodiment (claims 7 and 8).

The operation of the above configuration is such that the heat generating element of the heating box 33 is configured as the hot air generator 30 instead of the heat generating lamp 26 of the ninth embodiment, so that the reflection plate 32 is unnecessary. Since the hot air is forced to circulate inside the heating box 33, the temperature is easily equalized, and the other operations and effects are the same as those of the ninth embodiment.

The method of peeling the fire spread preventing agent 3 is the same as that of the first embodiment, and is removed after softening the fire spread preventing agent 3 to such an extent that it can be easily peeled from the cable 2 (claim 9). .

[0108]

As described above, according to the present invention, by providing a heating element facing a temperature sensor disposed on a fire spread preventing agent in a heated portion, even a fire spread preventing agent whose surface is solidified into irregularities can be obtained. In addition to enabling substantially uniform heating, the heating by the heating element is stopped only at the peeling operation location, and re-hardening of the unstarted portion is prevented, thereby facilitating continuous peeling operation over a long distance.

Further, by setting the softening temperature of the fire spread preventing agent in advance so as not to adversely affect the laid cable as the temperature set value in the heating temperature control device, the fire spread preventing agent can be easily removed from the cable. be able to. Accordingly, appropriate temperature control for softening the fire spread inhibitor is automatically performed, so that safety, reliability, and work efficiency are improved, and the burden on the worker is reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram of a cable spreading device according to a first embodiment of the present invention;

FIG. 2 is a longitudinal sectional view of the cable tray according to the first embodiment of the present invention.

FIG. 3 is a plan view of a main part of a seat heater according to a second embodiment of the present invention.

FIG. 4 is a longitudinal sectional view of a cable tray according to a second embodiment of the present invention.

FIG. 5 is a plan view of a main part of a seat heater according to a third embodiment of the present invention.

FIG. 6 is a plan view of a main part of a seat heater according to a fourth embodiment of the present invention.

FIG. 7 is a vertical sectional view of a cable tray according to a fourth embodiment of the present invention.

FIG. 8 is a schematic diagram of a cable spreader according to a fifth embodiment of the present invention.

FIG. 9 is a schematic view of a cable spreading device according to a sixth embodiment of the present invention.

FIG. 10 is a schematic view of a cable spreader according to a seventh embodiment of the present invention.

FIG. 11 is a schematic view of an eighth embodiment of a cable spreader removing device according to the present invention.

12 (a) is a longitudinal sectional view, FIG. 12 (b) is a plan view, and FIG. 12 (c) is a longitudinal sectional view of a cable spreader according to a ninth embodiment of the present invention.

FIGS. 13A and 13B are longitudinal sectional views, FIG. 13B is a plan view, and FIG. 13C is a longitudinal sectional view of a cable spreader according to a tenth embodiment of the present invention.

[Explanation of symbols]

1 ... cable tray, 2 ... cable, 3 ... fire spread inhibitor,
4: Temperature sensor, 5, 13, 21 ... Heating part, 6, 14, 22 ... Seat heater, 7: Heating wire, 8: Temperature measurement part, 9: Set temperature comparison part, 10: Power supply, 11: Temperature control part , 12: heating temperature controller, 15: one side of the sheet heater, 16: vertical cut, 17: horizontal cut, 18: comb teeth, 19: bending direction (arrow), 20: switch, 23: plastic deformation wire, 24: heat transfer pillow, 25: weight, 26: heating lamp, 27: support base, 28: heat-resistant reflective sheet, 29: conduit, 30, hot air generator, 31, 33: heating box , 32 ... reflector.

Claims (9)

[Claims] 1. A flexible sheet provided with a plurality of temperature sensors disposed on a surface of a fire spreader which is applied to a cable laid on a cable tray and solidified, and a plurality of heat generating portions corresponding to the respective temperature sensors. A heater, a temperature measuring section for measuring the temperature of each section from a temperature signal of each of the temperature sensors, a set temperature comparing section for comparing and monitoring the temperature of each section with a set value, and power supplied to each heating section from the monitoring result of the set temperature comparing section. A heating temperature control device provided with a temperature control unit for individually controlling or cutting off the temperature and controlling the temperature in each heat generating unit. 2. A flexible sheet heater provided with a plurality of heat generating portions, wherein one side is integrally formed with a notch in a vertical direction so that each heat generating portion is formed in a strip shape, and a plurality of right angles are formed on the strip-shaped heat generating portion. 2. The peeling device for a fire spread agent of a cable according to claim 1, wherein the cut is made in a comb shape. 3. A flexible sheet heater provided with a plurality of heat generating portions, wherein the shape of the sheet heater is freely deformed along each of a cut made in one side and a cut made in a vertical direction and a cut made in a perpendicular direction. 3. The apparatus according to claim 2, further comprising a plastic deformation wire for maintaining the state. 4. A flexible sheet heater provided with a plurality of heat generating portions, wherein each of the heat generating portions has excellent heat transferability and adhesion between a temperature sensor disposed on a surface of a fire spreader and a sheet heater. The cable spreader according to any one of claims 1 to 3, wherein a heat transfer pillow is interposed, and a weight is disposed on each of the heat generating portions. 5. A flexible sheet heater provided with a plurality of heat-generating portions, wherein the electric power is supplied by bending the heat-generating portions at a root of a cut made in each of the heat-generating portions at one side of the integrated one-side portion. The cable spreader according to any one of claims 1 to 4, further comprising a switch for cutting. 6. A plurality of temperature sensors disposed on a surface of a fire spreader which is applied to a cable laid on a cable tray or a conduit and solidified, and is heated by heat radiation provided opposite to the temperature sensors. A heating element, a heat-resistant reflection sheet surrounding the heating element together with the cable tray or the conduit and the wall penetration, a temperature measuring section for measuring the temperature of each section from a temperature signal of each temperature sensor, and comparing the temperature of each section with a set value. A heating temperature control device including a set temperature comparison unit to be monitored and a temperature control unit that performs temperature control on each heating element by individually adjusting or disconnecting power supply to each heating element from a monitoring result in the setting temperature comparison unit; A device for removing a fire spread agent from a cable, comprising: 7. In the cable spreader, the plurality of temperature sensors disposed on the surface of the solidified fire spreader applied to the cable laid on the cable tray and facing each of the temperature sensors. A heating box provided with a heating element to be heated by heat radiation to be arranged, a temperature measuring unit for measuring the temperature of each unit from a temperature signal of each of the temperature sensors, a set temperature comparing unit for comparing and monitoring the temperature of each unit with a set value, and the setting A heating temperature control device including a temperature control unit for controlling the temperature of each heating element by individually adjusting or disconnecting the power supply to each heating element based on the monitoring result in the temperature comparison unit. Inhibitor stripping device. 8. The cable spreading device according to claim 6, wherein in the cable spreading agent removing device, the heating element arranged to face the temperature sensor is a heating element heated by convection. Inhibitor stripping device. 9. In the cable fire spreader peeling device, each temperature sensor disposed on the surface of the cable spread or solidified fire spreader applied to the cable tray or the conduit laid on the cable and the cable laid on the wall penetration portion detects the temperature. While monitoring the temperature of each part with a heating temperature control device, the anti-fire spread agent applied to the cable and solidified is heated and softened to such an extent that it can be peeled off without adversely affecting the cable, and is removed. Cable spreading agent peeling method.