KR20100128810A - Sag sensor for cable sheathing apparatus - Google Patents

Abstract

PURPOSE: A deflection detector for a cable sheathing device is provided to prevent a groove or a protrusion from becoming formed in the inner diameter of a body by burying a filler member in the body. CONSTITUTION: A deflection detector for a cable sheathing device comprises a body(310). The body is formed in a hollow circular shape. A cable passes through the inside the body. A ring-shaped cutting groove(311) with a bigger width than a sensor(400) is formed in the inner diameter of the body. Upper and lower sensors are arranged in the top and bottom of the body. A filler member(500) is buried in the body and has the same inner diameter as the body.

Description

Sag sensor for cable sheathing device {Sag Sensor for Cable Sheathing Apparatus}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection detector for cable sheathing apparatus, and more particularly, to a cable deflection detector for detecting deflection of a cable passing through a vulcanization tube in a continuous crosslinking process of a power cable or an optical cable.

In the cross-linked polyethylene (XLPE) insulation coating process of the cable manufacturing process, such as power cable or optical cable, the inner semiconductive layer, the crosslinked polyethylene layer and the outer semiconducting layer are extruded on the surface of the wire rod. .

This insulation coating process is carried out in the form of a continuous vulcanization process in which polyethylene including a crosslinking agent is extruded and coated on a conductor surface, crosslinking under high temperature and high pressure, and cooling under pressure in one process continuously. .

During this continuous crosslinking process (or apparatus), the crosslinked tube and the cooling tube form a caterary in a slant or horizontal direction as compared to the vertical continuous vulcanization (VCV) in which the crosslinked tube and the cooling tube are vertically configured after extrusion. There is a Catenary Continuous Vulcanization (CCV) device.

In the process of CCV, since the crosslinking and cooling process forms a horizontal or inclined catinary, sagging occurs easily in the cable, and it is a cause of coating failure by contacting the vulcanizing tube when passing through the vulcanizing tube.

In order to prevent this, by installing a deflection detection sensor in the middle of the vulcanizing tube and thereby controlling the rotational speed of the take-up drum, the cable is always controlled to pass through the center of the vulcanizing tube.

With reference to FIG. 1, the structure of the conventional continuous crosslink type cable covering apparatus and the cable deflection detection sensor are demonstrated more concretely.

As shown in FIG. 1, in the cable covering device 100, the wire rod (also referred to as a conductor or a bare copper wire) M1 that is bound (or referred to as taping) is transferred from the delivery drum 110 to an accumulator. It enters into the extrusion apparatus 140 via the 120, the guide roller 131, and the metering capstan 132. In the head of the extrusion device 140, a triple co-extrusion method, that is, the inner semiconductive layer, the crosslinked polyethylene (PE) and the outer semiconductive layer are simultaneously extruded and coated through three extrusion heads. Sheathed cable (M2) coming out of the insulator coated state from the extrusion device 140 causes a crosslinking reaction while passing through the high-temperature, high-pressure crosslinking tube 150, and then cooled through the cooling tube 160 It is then wound around the winding drum 180 via the tensioning capstan 170.

In this cable sheathing device, a transformer 190 and a deflection amount detector 200 are installed in the middle of the vortex tube 150 at intervals in the longitudinal direction to guide the cable M2 using a magnetic field in the transformer 190. A current is generated and the deflection amount detector 200 detects a magnetic field induced in the cable M2 to control the position (a deflection amount) of the cable M2.

In short, the metering capstan 132 guides the feeding of the cable while rotating at a constant speed, and the tensioning capstan 170 is capable of adding or decreasing the rotational speed by a driving source such as a speed control motor. As described above, the tension of the cable M2 is converted into a DC voltage value by using the sensors installed on the upper and lower sides of the deflection detector 200 in the up and down tension state or the sagging state of the cable M2. 170 to control the rotational speed of the drive source, so that the tensioning capstan 170 pulls or relaxes the cable M2 more so that the cable M2 always passes through the center of the vortex tube 150. will be.

2 and 3a to 3c show the conventional deflection detector 200 described above. As illustrated, the conventional deflection detector 200 includes a hollow circular body 210 and a sensor 220 radially drawn toward the center of the body 310 above and below the body 210. It includes.

The body 210 is mainly made of a stainless steel material, and the sensor 220 is formed by bending a strand of stainless steel pipe 221, which is about 6 mm, into a closed curve to be bonded to the base plate 222.

The deflection detector 200 has a donut shape such that the inner diameter of the body 210 is wider than the width of the sensor 220 in order to create a path through which the magnetic field caused by the induced current flows to the sensor 220. The removed annular cut groove 211 is formed. In this case, the entire circumferential groove except for the sensor 220 portion of the entire circumference of the annular cutaway groove 211 is recessed than the inner diameter of the body 210.

As described above, when the deflection amount detector 200 has the annular cut-out groove 211 as it is, when the wire rod is set at the beginning of the process, the end of the wire rod is caught and the cable cannot be smoothly performed. Causes problems such as breakage or deformation causing errors in sag control.

In addition, water is accumulated in the bottom of the annular cut-out groove 211 or impurities in the vulcanization tube are accumulated in the bottom of the annular cut-out groove 211, thereby degrading the quality of the cable and providing another cause of sensor malfunction.

The present invention has been invented to solve the conventional problems as described above, the present invention allows the setting of the cable is free without the cable hanging phenomenon and to prevent the cable from touching the sensor, it can be implemented by a simple structure It is an object of the present invention to provide a deflection detector for a cable covering device.

In order to achieve the above object, the deflection amount detector for a cable sheathing device according to the present invention is a deflection amount detector which is provided in the middle of the longitudinal direction of the deflection pipe in order to detect the amount of deflection of the cable passing through the vulcanization pipe in the insulation coating device of the power cable. A hollow circular body through which the cable passes; An annular cut-out groove having a width wider than that of the sensor is formed in the inner diameter portion of the body; In the annular cut-out groove of the body is disposed the upper and lower sensors in the radially inward from the upper, lower portion of the body; In the annular cut-out groove, the filling member made of a non-magnetic material and a non-conducting body having the same inner diameter as the inner diameter of the body while the upper and lower sensors are inserted is embedded.

According to another embodiment of the present invention, a deflection detector includes: a body in the form of a hollow circle and having an annular cutout groove formed in an axial middle portion of an inner diameter portion; A sensor drawn in the radially inward from above and below the body and positioned within the annular cutout groove; The inner diameter portion of the body, characterized in that the liner tube is made of a non-magnetic non-conducting to cover and block the sensor and the annular cutting groove.

According to still another embodiment of the present invention, a deflection detector includes: a body having an annular cutout groove formed in an axial middle portion of an inner diameter of a hollow circular shape; A sensor drawn in the radially inward from above and below the body and positioned within the annular cutout groove; The inner diameter portion of the body is formed with an annular groove having a wider width than the sensor and the annular cutting groove; The annular groove is characterized in that the annular liner made of a nonmagnetic and non-conductive, which has the same inner diameter as the inner diameter of the body and covers and blocks the sensor and the annular cutting groove.

According to the deflection amount detector of the present invention, by filling a filling member made of a nonmagnetic material in an annular cutout groove formed in the body of the detector, formation of a groove or step that is likely to catch a cable in the inner diameter portion of the body is prevented. It can prevent the cable from jamming or damaging the sensor when the cable passes through the vulcanizing tube, and also prevents water and dust from accumulating in the cutout.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

(First embodiment of the deflection detector)

4 to 9 show a deflection detector according to a first embodiment of the present invention. FIG. 4 is a sectional perspective view, FIG. 5 is a front sectional view, and FIG. 6 is a line BB of FIG. 5. 7 is a cross-sectional view taken along line CC, FIG. 8 is a graph showing the permeability and melting temperature of each material of the filling member, and FIG. 9 is an output value of the sensor according to the material of the filling member. A graph showing is shown.

First, as shown in FIG. 4 to FIG. 7, the deflection detector 300a according to the present invention is inserted into the body 310 and the upper and lower portions of the body 310 in the form of a hollow circle. Sensor 400 that is present.

And the inner diameter portion of the body 310 is formed with an annular cutting groove 311 having a width wider than the width of the sensor 400. The sensor 400 is inserted in the radially inward from the top and bottom of the body 310 is disposed in the annular cut-out groove 311.

In the deflection detector 300a, the annular cut-out groove 311 is filled with a filling member 500 made of a nonmagnetic material. The inner diameter of the filling member 500 coincides with the inner diameter of the body 310, thereby preventing the formation of grooves or stepped holes that are likely to be caught in the inner diameter portion of the body 310. Therefore, when the cable passes through the vulcanization tube at the beginning of the process, the end of the cable may be caught and the problem of damaging the sensor 400 or the cable may be prevented, and the problem that foreign matter such as water or dust stays in the cutout groove 311. I can solve it.

As in the embodiment shown in the figure, the filling member 500 is to be filled in the axial space on both sides of the sensor 400 (both left and right spaces of the sensor 400 in Figures 4 and 5). Most preferably, it is not necessary to fill both spaces in the axial direction of the sensor 400. As a method of filling the filling member 500 in both axial spaces of the sensor 400, the resin 400 is injected into the cutting groove 311 while the sensor 400 is assembled to the body 310. Can be used to bury. In this case, the body 310 is the outer mold of the injection device, the inner diameter of the body 310 is coupled to the inner mold, the resin injection hole (not shown) through the annular cut-out groove 311 on one side of the body 310 Not injected) and the molten resin is injected through the resin injection hole.

Here, the charging member 500, so as not to affect the magnetic field should be selected a material that does not affect the operation of the sensor 400.

In addition, since the vulcanization process is mainly performed under high temperature (200 ° C. to 400 ° C.) and high pressure (about 20 bar), the sensor 400 must be able to withstand such a harsh use environment. For example, although it depends on the way the heating tube is heated, nitrogen or steam will flow inside the curing tube. Therefore, the filling member 500 should select a material that can withstand the environment of high temperature, high pressure, high humidity.

In other words, when the space formed by the cutting groove 311 of the body 310 is filled with a metallic material with an investment force, since the magnetic field is affected by the internal charging member 500, the size of the signal of the sensor 400 becomes small or Distortion occurs.

That is, as can be seen in Figure 8, when the internal filling member 500 is made of stainless steel (SUS316, SUS304) or steel (Carbon steel, Nickel alloy steel, Low-carbon (alloy) steel) environment of high temperature and high pressure However, in the case of steel, the magnetic permeability is higher than 600, so the magnetic field is transmitted to the sensor 400 because it is too strong than the actual, and the magnetic permeability is low when the magnetic permeability is low, such as stainless steel Retains (or interferes with) the magnetic field originating from the cable, so that the magnetic field transmitted to the sensor 400 is less than actual, thus weakening the signal strength of the sensor. Therefore, it is preferable that the corner member 500 is selected of a nonmagnetic, insulator (insulator) having a magnetic permeability of zero, that is, a resin material (including plastic) such as Insulex, Insulite, Hemmit, Tefron, and the like.

9 illustrates a graph in which the output value of the sensor 400 is measured when the filling member 500 is used as an insulex, stainless steel (SUS304), and low carbon steel, respectively. In the graph shown in FIG. 9, since the output value of the deflection detection sensor is the difference value between the upper sensor 400 and the lower sensor 400, when the output of both sensors is large, a 'zero' volt ( V), and when one side is large, it is 0-5V or 0-5V.

As shown in FIG. 9, when the filling member is used as a low carbon steel, the low carbon steel has a high permeability and transmits an excessively strong magnetic field to the upper and lower sensors, thereby greatly distorting the actual magnetic field. This is undesirable because there will be no difference in the output values. The charging member of stainless steel is not preferable because the magnetic force line from the cable is not properly transmitted to the sensor and reaches through the charging member, which causes a loss of the magnetic field, thereby weakening the strength of the signal transmitted to the sensor. . On the other hand, a filling member made of a nonmagnetic, non-conductor (insulator) is preferable because the magnetic field from the cable is transmitted to the sensor as it is, with little change, since it does not affect the magnetic field.

Thus, as the material of the nonmagnetic material and the non-conductor (insulator) suitable as the filling member, various materials such as asbestos, backlight, etc. can be used in addition to the aforementioned materials, namely Insulex, Insulite, Hemmit, and Tefron. In addition, such a filling member material has a permeability μ of zero. It must also be able to withstand temperatures of at least 200 ° C and pressures of 15 bar.

Hereinafter, specific embodiments of the buried structure of the filling member of the deflection detection sensor of the present invention will be described.

(First Embodiment of Charging Part Material)

10 to 12 show a first embodiment of the filling member embedding structure of the deflection detection sensor according to the first embodiment of the present invention, a cross-sectional view is shown in FIG. 10, a side cross-sectional view is shown in FIG. 12 is an exploded perspective view.

As shown in the figure, an opening-type cutout groove 320 having a form opened in an axial side of the body 310a is formed in the inner diameter portion of the body 310a of the deflection amount detector, and The sensor 400 is inserted and disposed from the upper and lower portions of the body 310a toward the radially inner side.

And the filling member (500a) is inserted into the opening cut groove 320, as shown in Figs. 11 and 12, of the arc-shaped partitioned on both sides in the circumferential direction based on the upper, lower sensor 400 The first and second divided pieces 511 and 512 may be configured to pass through the first and second divided pieces 511 and 512 to the opening of the open cutout 320. Inserted in the axial direction through, and the opening of the opening cut groove 320 is blocked with a blocking member 321 having the same inner diameter as the inner diameter of the body 310a.

The blocking member 321 may be welded to the body 310a or bonded by an adhesive. When welding the blocking member 321 to the body 310a by welding, if the blocking member 321 is made of the same material as that of the body 310a, welding is easy and the material identity can be maintained, so that the expected value due to the change in the material can be achieved. No faults or errors will occur.

In such a configuration, the configuration and assembly of the filling member 500a are easy, and the filling member 500a is easily embedded in the body 310.

(Second embodiment of the filling member)

13 to 15 show the structure of the filling member according to the second embodiment of the present invention, a cross-sectional view is shown in FIG. 13, an exploded perspective view is shown in FIG. 14, and a side view is shown in FIG. 15. .

This embodiment is different from the first embodiment only in the form of the filling member and the rest of the configuration is the same. The same reference numerals are given to the same parts as in the first embodiment.

That is, the charging member 500b according to the present embodiment divides the first and second slice pieces 521 and 522 having a thin plate shape while forming an arc by dividing the upper and lower sensors 400 into two circumferential directions on both sides. A plurality of the first and second slice pieces 521 and 522 are formed by stacking the first and second slice pieces 521 and 522 in the axial direction through the openings of the open cut groove 320.

After stacking the first and second slice pieces 521 and 522 in this manner, the openings of the opening cutouts 320 may have the same inner diameter as the inner diameter of the body 310a, as in the first embodiment. The blocking member 321 has a form.

As described in the present embodiment, the filling member 500b composed of the thin first and second slice pieces 521 and 522 having a thin thickness is suitable to be easily configured with a material such as asbestos gaskets. It is suitable for application to high temperature (up to about 300 ° C), high pressure steam vortex tubes.

(Third Embodiment of Charging Member)

16 and 17 illustrate a structure of a filling member according to a third exemplary embodiment of the present invention, in which a cross-sectional view is shown in FIG. 16, and a side view is shown in FIG. 17.

In the above-described first and second embodiments, the filling members 500a and 500b are divided into two semi-circular shapes and configured to assemble in an axial direction through the inlet of the opening cutout groove 320. The filling member 500c is divided into four divided pieces 531, 532, 533, and 534 in the circumferential direction and inserted into the annular cutout groove 330 to be assembled.

That is, an annular cutout groove 330 having a width wider than that of the sensor 400 is formed in the inner diameter portion of the body 310c of the deflection detector, and an image of the body 310c is formed in the annular cutout groove 330. The sensor 400 is drawn in from the bottom toward the radially inner side.

The charging member 500c is formed of arc-shaped first to fourth divided pieces 531, 532, 533, and 534 which are divided into two or more on both sides of the circumferential direction based on the upper and lower sensors 400. In the configuration, the divided pieces 531, 532, 533, and 534 are inserted into the annular cut-out groove 330 one by one into the inner diameter portion of the body 310c.

In this second embodiment, the charging member 500c is not necessarily divided into four, but divided into four (two on one side), six (three on one side), eight (four on each side), and the like. can do. The larger the number of divisions, the easier it is to fit through the inner diameter portion of the body 310c, but the larger the number of divisions, the more the assembly labor takes, so it is determined in consideration of the advantages and disadvantages.

In the form of dividing the filling members 500a and 500b into two parts in the circumferential direction as in the above-described first and second embodiments, the size of the split piece is so large that the body cannot be assembled into the inner diameter of the bodies 310a and 310b. The body 310a (310b) and the blocking member 321 is to be divided and manufactured after bonding, but when divided into four pieces or more as in the present embodiment, the size of the split piece is small and easily put into the inner diameter of the body (310c) Since it can be assembled, it can be configured as a single body 310c without having to divide or open the body, there is an advantage that the manufacturing and assembly is simple.

(Second embodiment of the deflection detector)

18 is a cross-sectional view showing a deflection amount detector 300b according to a second embodiment of the present invention. The same parts as in the deflection detector 300a according to the first embodiment will be described with the same reference numerals.

As shown in FIG. 18, the deflection detector 300b according to the second embodiment of the present invention has a hollow circular shape and a body having an annular cut-out groove 311 formed in an axial middle portion of the inner diameter portion. 310 and a sensor 400 drawn in the radially inward from the upper and lower portions of the body 310 and positioned in the annular cutting groove 311.

In addition, the inner diameter of the body 310 is formed of a non-magnetic, non-conductive liner tube 600 is inserted to cover and block the sensor 400 and the annular cutting groove 311.

The liner tube 600 prevents the exposure of the sensor 400 by covering and blocking the sensor 400 and the annular cutting groove 311, and prevents harmful substances from penetrating or remaining in the annular cutting groove 311. .

The liner tube 600 is preferably made of nonmagnetic and non-conductive material in the same manner as the filling member 500 according to the first embodiment, and thus does not distort the magnetic field transmitted to the sensor 400.

(Third Embodiment of Deflection Detector)

19 and 20 show a deflection detector 300c according to a third embodiment of the present invention. FIG. 19 is a cross-sectional view and FIG. 20 is an exploded cross-sectional view of FIG. 19. The same reference numerals are given to the same couple as the deflection detector 300b of the second embodiment.

As shown in FIG. 19, the deflection detector 300c according to the present embodiment includes a body 310 having an annular cut-out groove 311 formed in a hollow circular shape and formed in an axial middle portion of an inner diameter portion thereof. It includes a sensor 400 is inserted into the radially inward from the upper and lower portions of the body 310 and positioned in the annular cut groove 311.

And the inner diameter portion of the body 310 is formed with an annular groove 340 having a wider width than the sensor 400 and the annular cutting groove 311, the annular groove 340 of the body 310 The annular liner 620 having the same inner diameter as the inner diameter is formed in a buried form.

The annular liner 620 according to the present embodiment is made of a nonmagnetic and insulator similarly to the liner tube 600 according to the second embodiment, and covers and closes the sensor 400 and the annular cutout groove 311. This prevents the exposure of the sensor 400 and prevents the harmful effects of foreign matter penetrating into or staying in the annular cutting groove 311.

As an example of the preferred assembling structure of the liner tube 620, as shown in FIG. 20, a cutout groove 311a that is opened in the axial direction on one of the inner diameters of the body 310 is formed, and the open cutout groove is formed. An opening annular groove 340a is formed inside the 311a. Then, the cylindrical annular liner 620 is provided and inserted from the inlet of the open cut groove 311a to the open annular recess 340a, and then the blocking member 341 is inserted into the inlet of the open cut groove 311a. The membrane is in form. The blocking member 341 is formed with an opening annular groove 341a for inserting the annular liner 620.

Figure 21 is a graph measuring the output value of the sensor according to the material of the liner tube 600 and the annular liner 620 of the deflection detector (300b) 300c according to the second and third embodiments of the present invention to be.

21 shows almost the same results as in FIG. 9.

That is, when the liner tube 600 and the annular liner 620 are used as materials having a permeability such as stainless steel (SUS304) or low carbon steel, the magnetic field transmitted from the cable to the sensor 400 is distorted. An error occurs in the output signal of the sensor 400. However, when the liner tube 600 and the annular liner 620 are formed of an insulator, which is one of nonmagnetic and insulator, the magnetic field is not affected. The magnetic field is transmitted to the sensor intact with little change.

In the above, specific embodiments of the present invention shown in the accompanying drawings have been described in detail, but these are merely illustrative of the preferred embodiments of the present invention, and the scope of protection of the present invention is not limited thereto. In addition, the embodiments of the present invention as described above can be variously modified and equivalent other embodiments by those of ordinary skill in the art within the technical spirit of the present invention, such modifications and equivalent other embodiments are naturally It belongs to the appended claims of the present invention.

1 is a system diagram showing the overall configuration of a general cable sheathing apparatus and the arrangement structure of a cable deflection detection sensor.

2 is a cross-sectional perspective view of a conventional deflection detector.

3A is a front sectional view of a conventional deflection detector.

3B is a cross-sectional view taken along the line A-A of FIG. 3A.

3C is a side view of a conventional deflection detector.

4 is a cross-sectional perspective view showing the structure of a deflection detector according to a first embodiment of the present invention.

5 is a front sectional view of a deflection detector according to a first embodiment of the present invention.

FIG. 6 is a cross-sectional view taken along line B-B of FIG. 5.

FIG. 7 is a cross-sectional view taken along the line C-C of FIG. 5.

8 is a graph showing the relationship between the magnetic permeability and the melting temperature of each material of the filling member.

9 is a graph measuring the output value of the sensor according to the material of the filling member.

10 is a cross-sectional view showing a first embodiment of the filling member buried structure of the deflection amount detector according to the first embodiment of the present invention.

FIG. 11 is a side cross-sectional view of FIG. 10.

12 is an exploded perspective view of FIG. 10.

FIG. 13 is a cross-sectional view illustrating a second embodiment of a filling member buried structure of a deflection detector according to a first embodiment of the present invention.

14 is an exploded cross-sectional perspective view of FIG. 13.

15 is a side view of FIG. 13.

16 is a cross-sectional view showing a third embodiment of the filling member embedding structure of the deflection amount detector according to the first embodiment of the present invention.

17 is a side view of FIG. 16.

18 is a cross-sectional view of a deflection detector according to a second embodiment of the present invention.

19 is a cross-sectional view of a deflection detector according to a third embodiment of the present invention.

20 is an exploded cross-sectional view of FIG. 19.

FIG. 21 is a graph measuring output values of sensors according to materials of a liner tube of a deflection detector according to a second embodiment and a third embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

300a, 300b, 300c: deflection detector

310, 310a, 310c: body

311, 320, 331: annular cut-out groove

321, 341: blocking member

330: annular cutout groove

340: annular groove

340a, 341a: opening annular groove

400: sensor

500, 500a, 500b, 500c: Filling member

511, 512: first divided piece, second divided piece

521, 522: first slice divided piece, second slice divided piece

531, 532, 533, 534: first, second, third, and fourth divided pieces

600: Liner Tube

620: annular liner

Claims (8)

A deflection detector provided in the middle of the longitudinal direction of the vulcanizing tube for detecting the deflection of the cable passing through the vulcanizing tube in the insulation coating device of the power cable, It includes a hollow circular body 310 through which the cable passes, The inner diameter portion of the body 310 is formed with an annular cut-out groove 311 having a width wider than the width of the sensor 400, In the annular cut-out groove 311 of the body 310, upper and lower sensors 400, which are radially inwardly directed toward the center of the body 310 from the upper and lower parts of the body 310, are disposed, In the annular cut-out groove 311, the filling member 500 made of a non-magnetic material and an insulator having an inner diameter equal to the inner diameter of the body 310 is embedded while the upper and lower sensors 400 are inserted therein. Deflection detector to be used. The method of claim 1, The filling member 500 is formed by injection molding a resin made of a nonmagnetic material and a non-conductive material in the annular cutting groove 311 in a state in which the upper and lower sensors 400 are coupled to the body 310. Deflection detector. A deflection detector provided in the middle of the longitudinal direction of the vulcanizing tube for detecting the deflection of the cable passing through the vulcanizing tube in the insulation coating device of the power cable, It includes a hollow circular body 310a through which the cable passes, In the inner diameter portion of the body 310a, an opening-type cutting groove 320 having an opening in one axial direction of the body 310a is formed. The upper and lower sensors 400, which are radially inwardly directed toward the center of the body 310, are disposed in the opening-type cutting groove 320 and above and below the body 310a. The first and second divided pieces 511 and 512 of the non-magnetic material and the non-conductive material are formed in the opening-type cutting groove 320 and are divided into two circumferential directions on both sides of the upper and lower sensors 400. Is inserted in the axial direction from the inlet of the opening cut groove 320 with the upper, lower sensor 400 therebetween, The opening of the opening cut-out groove 320 is blocked by a blocking member 321 having the same inner diameter as the inner diameter of the body 310a, the amount of deflection detector. A deflection detector provided in the middle of the longitudinal direction of the vulcanizing tube for detecting the deflection of the cable passing through the vulcanizing tube in the insulation coating device of the power cable, It includes a hollow circular body 310a through which the cable passes, In the inner diameter portion of the body 310a, an opening-type cutting groove 320 having an opening in one axial direction of the body 310a is formed. The upper and lower sensors 400, which are radially inwardly directed toward the center of the body 310 from the upper and lower portions of the body 310a, are disposed in the opening cutout groove 320. The filling member 500b is inserted into the opening cut groove 320, and the filling member 500b is divided into two circumferential directions on both sides of the upper and lower sensors 400 to form a circular arc shape. The first and second slice segments 521 and 522 formed of an adult and insulator are axially inserted through the inlet of the opening cut groove 320 to be stacked. The opening of the opening-type cutting recess 320 is blocked by a blocking member 321 having the same inner diameter as the inner diameter of the body 310a. A deflection detector provided in the middle of the longitudinal direction of the vulcanizing tube for detecting the deflection of the cable passing through the vulcanizing tube in the insulation coating device of the power cable, It includes a hollow circular body 310c through which the cable passes, The inner diameter portion of the body 310c is formed with an annular cutting groove 330 having a width wider than the width of the sensor 400, The upper and lower sensors 400 are disposed in the annular cut-out groove 330 radially inward from the upper and lower portions of the body 310c toward the center of the body 310. The filling member 500c is inserted into the opening cutout groove 330, and the filling member 500c is divided into two or more portions in both circumferential directions based on the upper and lower sensors 400. Is composed of divided pieces (531, 532, 533, 534, ...) divided into four or more arcuate pieces, each of the divided pieces (531, 532, 533, 534, ...) Deflection detector, characterized in that inserted into the inner diameter portion of the 310c) and inserted into the annular cut-out groove (330). A deflection detector provided in the middle of the longitudinal direction of the vulcanizing tube for detecting the deflection of the cable passing through the vulcanizing tube in the insulation coating device of the power cable, A body 310 having an annular cut-out groove 311 formed in the axial middle portion of the inner diameter of the hollow circular shape, And a sensor 400 drawn in the radially inward direction toward the center of the body 310 from the upper and lower portions of the body 310 and positioned in the annular cutting groove 311. The inner diameter portion of the body 310, the amount of deflection detector, characterized in that the liner tube 600 is made of a non-magnetic non-conducting to cover and block the sensor 400 and the annular cut-out groove (311). A deflection detector provided in the middle of the longitudinal direction of the vulcanizing tube for detecting the deflection of the cable passing through the vulcanizing tube in the insulation coating device of the power cable, A body 310 having an annular cutting groove 311 formed in the axial middle portion of the inner diameter of the hollow circular shape; And a sensor 400 drawn in the radially inward direction toward the center of the body 310 from the upper and lower portions of the body 310 and positioned in the annular cutting groove 311. The inner diameter portion of the body 310 is formed with an annular groove 340 having a wider width than the sensor 400 and the annular cutting groove 311, The annular groove 340 is a non-magnetic non-conductive annular liner 620 is embedded with an inner diameter equal to the inner diameter of the body 310 to cover and block the sensor 400 and the annular cutting groove 311. Deflection detector to be used. A deflection detector provided in the middle of the longitudinal direction of the vulcanizing tube for detecting the deflection of the cable passing through the vulcanizing tube in the insulation coating device of the power cable, A body 310 having a hollow circular shape and having an opening-shaped cutting groove 311a formed in an inner diameter portion thereof in an axial direction; And a sensor 400 drawn in the radially inward direction toward the center of the body 310 from the upper and lower portions of the body 310 and positioned in the annular cutting groove 311a. An opening annular groove 340a is formed inside the opening cutting groove 311a. The non-magnetic and non-conductive liner tube 600 is embedded in the opening annular groove 340a to cover and block the sensor 400 and the opening cutting groove 311a having the same inner diameter as that of the body 310. , The opening of the opening cut-out groove 311a is blocked by the blocking member 341 having the same inner diameter as the inner diameter of the body 310 and having an opening annular groove 341a into which the annular liner 620 is inserted. Characterized in deflection detector.

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