JP2011033619A - Measuring method and measuring device for charge profile in blast furnace - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a surface profile of a charge which is inserted in a blast furnace to be measured in a plana shape, and to enable introductory operation during the profile measurement quickly capable of the introductory operation to be operated, according to the measured profile, and furthermore, to attain smaller and lighter in the device as a whole. <P>SOLUTION: In the device, an antenna connected to a microwave transmission and reception means and a reflector plate which is variable in its reflection angle are accommodated in a container; additionally, this container is mounted hermetically at an opening which is located at a suitable position of the blast furnace upper part; the microwave beam emitted from the antenna is reflected at the reflection plate and plane-scanned the surface of the charge; and the reflected microwave at the surface of the charge is detected by the microwave transmission and reception means, then the distance data corresponding to the scanning position are obtained and this distance data are mapped. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a method and apparatus for measuring the surface profile of a charge inserted in a blast furnace.

  In a blast furnace that melts iron ore, iron ore and coke are usually charged alternately from the top of the furnace so that the surface profile of the charge at the top of the furnace becomes an inverted weight like ant hell (see Fig. 4). Perform the charging operation.

  In such a blast furnace, by forming an appropriate charge distribution, the gas flow in the furnace is stabilized, and it becomes possible to reduce fuel costs and extend the life of the furnace body. In order to perform proper charge distribution control, it is necessary to accurately measure the surface profile of the charge in a short time and to perform appropriate raw material charge adjustment in response to changes in furnace conditions. Conventionally, as a method for measuring the surface profile, as shown in FIG. 7, a microwave is directed from the antenna 11 attached to the tip of a lance 10 that passes through the furnace wall 1 and is inserted into the furnace toward the surface of the charge 20. M1 is emitted, the reflected microwave M2 from the surface of the charge 20 is received by the antenna 10, and the distance from the antenna 10 to the surface of the charge 20 is measured by the frequency of the beat wave obtained by mixing. The method is general, and the surface profile of the charge 20 is obtained by measuring while moving the lance 10 (see, for example, Non-Patent Document 1).

  However, since the lance 10 moves linearly, a profile of the entire surface of the charge 20 cannot be obtained. Moreover, since the lance 10 needs to be as long as the inner diameter of the furnace, is long and has a high load, if it is inserted into the furnace for a long time, it will hang down due to its own weight and will not come out of the furnace. Therefore, a large space is required outside the furnace. Furthermore, a drive unit for moving the lance 10 is required separately, which increases equipment costs and operation costs. In addition, a charging operation cannot be performed during profile measurement, and a quick charging operation according to the measured profile cannot be performed.

"Steel Research" No.317, pp.3-16

  Therefore, the present invention can measure the profile of the surface of the charge inserted in the blast furnace in a planar shape, enables the charging operation even during profile measurement, and enables a quick introduction operation according to the measured profile. The purpose is to reduce the size and weight.

In order to achieve the above object, the present invention provides the following method and apparatus for measuring a charge profile in a blast furnace.
(1) A method of measuring the surface profile of a charge such as iron ore or coke charged in a blast furnace by microwaves,
An antenna connected to the microwave transmission / reception means and a reflection plate having a variable reflection angle are accommodated in a container, and the container is hermetically attached to an opening provided at an appropriate position above the blast furnace, and a microwave beam emitted from the antenna is The surface of the charged object is scanned in a planar shape by being reflected by the reflecting plate, and the microwave reflected by the surface is detected by the microwave transmitting / receiving means to obtain distance data corresponding to the scanning position. To measure the charge profile.
(2) An apparatus for measuring the profile of the surface of a charge such as iron ore or coke charged in a blast furnace by microwaves,
The microwave transmission / reception means by a reflection plate having a variable reflection angle, an angle variable mechanism for controlling the reflection angle of the reflection plate, a microwave transmission / reception means, and a waveguide closed by a plug member made of a dielectric material. The reflector and the antenna are disposed opposite to each other in a container having an open surface, and the microwave transmitting / receiving means and the angle variable mechanism are accommodated in separate containers, respectively. A measuring unit attached in a state,
While controlling the driving of the angle variable means and the microwave transmitting and receiving means, and a controller for analyzing the detection signal,
The measurement unit is hermetically attached to the blast furnace so that the opening of the container overlaps with an opening provided at an appropriate position in the upper part of the blast furnace, and the microwave emitted from the antenna is reflected by the reflector and the surface of the charge The microwave reflected by the surface is detected by the microwave transmission / reception means, and distance data corresponding to the scanning position is obtained and mapped by the control unit. Input profile measuring device.
(3) In the measurement unit,
The reflecting plate is supported by the support member via the supporting shafts provided at both ends thereof so as to be rotatable about the supporting shaft, and on the surface of the reflecting plate opposite to the antenna facing surface, the supporting plate is supported. A rod-shaped piece that moves on a straight line orthogonal to the axis,
The reflector is moved in the first direction around the support shaft by moving the bar-shaped piece, and the support member is rotated in the second direction around the axis,
The insertion according to (2), wherein the microwave reflection angle by the reflecting plate is controlled by combining the rotation in the first direction and the rotation in the second direction. Object profile measuring device.
(4) The rod-like piece hangs from the tip of the connecting rod moving along the axis of the waveguide toward the back surface of the reflector,
The support member is fixed to the tip of the inner shaft of the shaft tube having a double structure of the inner shaft and the outer shaft, the connecting rod is fixed to the outer shaft, and the inner shaft is rotated around the axis. The insert profile measuring device according to the above (3), further comprising driving means for moving the outer shaft along the axis.
(5) The insert profile measuring apparatus according to (3) or (4) above, wherein a nitrogen gas inlet is provided in the container that houses the reflector and the antenna to allow nitrogen gas to flow.
(6) In the measurement unit,
In the opening of the guide pipe in which an opening facing the opening of the blast furnace is formed, a reflector is rotatably supported via support shafts provided at both ends thereof.
One end of a rod-like piece is fixed at the center of the surface opposite to the antenna-facing surface of the reflector, and the other end of the rod-like piece is connected to a connecting rod that can move in the axial direction of the guide pipe,
The reflector is moved in the first direction around the support shaft by moving the connecting rod, and the guide pipe is rotated in the second direction around the axis,
The insertion according to (2), wherein the microwave reflection angle by the reflecting plate is controlled by combining the rotation in the first direction and the rotation in the second direction. Object profile measuring device.
(7) The opening of the guide pipe is formed at the center in the longitudinal direction of the guide pipe,
An antenna is connected to one end of the guide pipe, and driving means for moving the connecting rod and driving means for rotating the guide pipe are attached to the outside of the end face closing the other end. The insert profile measuring device according to (6) above, wherein
(8) a container surrounding the reflector and the periphery of the opening of the guide pipe;
A support member provided with a pair of bearings disposed on both outer sides of the container and supporting the guide pipes projecting on both sides of the container and a seal member for maintaining airtightness of the container. The insert profile measuring device according to (7) above.
(9) The guide pipe is divided on the antenna side wall surface of the container, a portion of the guide pipe protruding from the container toward the antenna is joined to the container, and the other portion protruding from the container is supported. The insert profile measuring device according to (8), wherein the insert profile measuring device is supported by a member.
(10) The above-mentioned (6), wherein a hole that does not affect microwave transmission / reception is formed in at least one of the antenna and the reflector, and a nitrogen gas inlet is provided in the guide pipe to allow nitrogen gas to flow in. The insert profile measuring device according to any one of (9) to (9).

  According to the present invention, the profile of the surface of the charge inserted into the blast furnace can be measured over the entire surface, the charging operation can be performed even during profile measurement, and a quick introduction operation can be performed according to the measured profile. In addition, the entire apparatus can be reduced in size and weight, and maintenance work can be performed safely.

It is a figure showing the whole charge profile measuring device composition concerning the present invention. It is an enlarged view which shows the 1st example of a measurement part. It is sectional drawing which looked at the measurement part shown in FIG. 2 from the upper surface. It is a sectional side view which shows the 2nd example of a measurement part. FIG. 5 is a partially cutaway perspective view showing the vicinity of the reflector of the measurement unit shown in FIG. 4. It is a figure which shows the mechanism which changes the inclination-angle of the reflecting plate of the measurement part shown in FIG. It is a figure which shows the conventional charge profile measuring apparatus.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram showing an overall configuration of an insert profile measuring apparatus according to the present invention, and shows a cross section along the axis of a blast furnace. 2 is an enlarged view showing the periphery of the measurement unit A, and FIG. 3 is a cross-sectional view of the measurement unit A as viewed from above.

  The measuring section A is configured by accommodating a disk-shaped reflecting plate 100 and an antenna 120 connected to the microwave transmitting / receiving means 110 so as to face each other in the first container 130, and in the vicinity of the top of the furnace wall 1. It is attached to the opening 2 provided at an appropriate position. A valve 30 is provided under the reflector 100 via a ceramic filter 31. The valve 30 is opened during profile measurement, and is closed during maintenance and inspection. Furthermore, a filter 32 is provided between the valve 30 and the opening 2 to prevent inflow of high temperature gas and dust from the furnace. Further, nitrogen gas is supplied from the nitrogen gas inlet 33, and the inside of the measuring part A is set to a pressure higher than that in the furnace during profile measurement to prevent dust from entering.

  The antenna 120 is preferably a parabolic antenna because the mounting depth is short.

  The first container 130 has a substantially cylindrical shape, the upper surface thereof is closed with an upper lid 131, the lower surface 132 is opened, and the ceramic filter 31 and the filter 32 (not shown) are interposed to interpose the furnace wall 1. It is mounted so as to overlap with the opening 2. Further, a nitrogen gas intake port 135 is provided, and nitrogen gas is supplied.

  An antenna 120 is attached to the peripheral wall of the first container 130, and the second container 140 is mounted so as to cover the back surface of the antenna 120. The second container 140 accommodates microwave transmission / reception means 110, and the microwave transmission / reception means 110 and the antenna 120 are connected by a waveguide 150. The waveguide 150 is closed by a plug member 151 made of a dielectric material so that gas and dust do not flow through an opening (not shown) for transmitting and receiving microwaves of the antenna 120. The microwave transmission / reception means 110 is connected to an external control unit (not shown) via the connector 155, and power supply, microwave transmission / reception control, detection signal processing, and the like are performed through the control unit. .

  Furthermore, a variable angle mechanism 160 for controlling the angle of the reflecting plate 100 is mounted on the peripheral wall of the first container 130 at a position orthogonal to the antenna 120. The reflecting plate 100 is disposed at the center of the first container 130, and both ends of its diameter are supported by bearings 102 a and 102 b provided at both ends of a semi-annular support arm 101. The support arm 101 is directly connected to the inner shaft 161 of the angle variable mechanism 160. The inner shaft 161 is rotationally driven by the first motor 170, and the reflector 100 rotates in the arrow X direction accordingly.

  Further, the tip 103a of the rod-shaped piece 103 is fixed to the center of the back surface 100a opposite to the antenna facing surface of the reflector 100. The rod-like piece 103 is connected to the connecting rod 105 via the first spherical plain bearing 104, and the other end of the connecting rod 105 is arranged coaxially with the inner shaft 161 via the second spherical plain bearing 106. It is connected to the tip of the provided outer shaft 162.

  A male screw 162 a is formed on the outer peripheral surface of the other end of the second spherical plain bearing 106 on the outer shaft 162, and is a female screw that is rotationally driven by a second motor 172 mounted on the inner shaft 161. The member 173 is screwed with a female screw 173a formed on the inner peripheral surface. Then, when the second motor 172 is driven, the female screw member 173 rotates and moves in the left-right direction in the drawing so that the outer shaft 162 approaches or separates from the reflecting plate 100, and the connecting rod 105 is moved accordingly. Move in the horizontal direction. The movement of the connecting rod 105 causes the first spherical plain bearing 104 to move circularly with the bearings 102a and 102b as fulcrums. Since the reflector 100 is restricted from moving in the left-right direction in the drawing by the bearings 102a and 102b, the tip 103a of the rod-like piece 103 moves circularly in conjunction with the movement of the first spherical plain bearing 104, thereby reflecting. The plate 100 rotates in the vertical direction in the drawing, that is, in the arrow Y direction.

  Although not shown, the second motor 172 can be rotated by the rotational difference between the first motor 170 and the second motor 172 without attaching the second motor 172 on the inner shaft 161.

  In the variable angle mechanism 160 configured as described above, when the inner shaft 161 and the outer shaft 162 cooperate, the reflecting plate 100 is inclined at a predetermined angle in the direction of the arrow X by the rotation of the inner shaft 161, and at the same time, the outer shaft 162 is rotated. To rotate the tip 103a of the rod-like body 103 in a circular motion to add rotation in the arrow Y direction, and the reflector 100 can be tilted in an arbitrary direction.

  In addition, the variable angle mechanism 160 includes a first motor 170, a second motor 172, an inner shaft 161, a part of the outer tube 162, and a female screw member 173 accommodated in the third container 180. 130 is attached. Further, the first motor 170 is connected to an external control unit through a connector 174, and the second motor 172 is connected to an external control unit through a connector 175, and power supply and rotation control are performed through the control unit.

  In order to measure the surface profile of the charge, the microwave M oscillated by the microwave transmitting / receiving means 110 is emitted from the antenna 120, reflected by the reflected wave 100, and transmitted toward the charge 20 through the opening 2. To do. Then, the microwave M reflected from the surface of the charge 20 is reflected by the reflector 100 and guided to the antenna 120, received by the microwave transmitting / receiving means 110, the received signal is sent to the external control unit, and the beat wave is transmitted. The distance from the antenna 120 to the surface of the charge 20 is obtained from the frequency of.

  In the present invention, the angle of the reflecting plate 100 is continuously changed by the angle variable mechanism 160 so that the microwave M scans the entire surface of the charge 20. Then, the profile of the entire surface of the charge can be obtained by two-dimensionally mapping the scanning position information and the distance to the surface of the charge 20. In the scanning with the microwave M, there is no problem in measurement even if a new charge is inserted.

  In the blast furnace, carbon monoxide gas harmful to the human body is generated, and the airtightness of the measuring section A is an important safety issue. In the present invention, as described above, the double airtight structure is formed by the filter 32 and the ceramic filter 31, the reflection plate 100 and the antenna 120 are accommodated in the first container, and the microwave transmitting / receiving means 110 is accommodated in the second container. In addition, the waveguide 150 used for connection to the antenna 120 is closed by the plug member 155, and the angle variable mechanism 160 is housed in the third container 180. There is no leakage to the outside.

  Further, by closing the valve 30, the measuring section A can be separated from the blast furnace in a state where the blast furnace is airtight, and maintenance work of the measuring section A can be performed safely.

  As the angle varying mechanism of the reflecting plate, the configuration shown in FIGS. 4 to 6, the same members as those shown in FIGS. 1 to 3 are denoted by the same reference numerals.

  FIG. 4 is a side sectional view of the overall configuration. As shown in the figure, an antenna 120 is attached to one end of a guide pipe 200, and a microwave transmitting / receiving means 110 is connected to the antenna 120. The transmission and reception of microwaves is controlled at. The waveguide 150 connecting the antenna 120 and the microwave transmission / reception means 110 is closed with a plug member 151, and the microwave transmission / reception means 110 is accommodated in the second container 140 and sealed.

  In addition, an opening 210 is formed at the center of the guide pipe 200 by cutting out a surface facing the opening 2 of the furnace, and the disc-shaped reflecting plate 100 is accommodated in the opening 210. . Further, the opening 210 of the guide pipe 200 is surrounded by a first container 130, and the first container 130 is open on the side facing the opening 2 of the furnace. The ceramic filter 31 and the filter 32 are interposed and connected to the furnace opening 2 (see FIG. 1). The opening of the first container 130 is closed with a filter 220 so that dust from the furnace does not flow into the guide pipe 200.

  As shown in FIG. 5, the reflecting plate 100 is provided with a support shaft 190 that protrudes from both ends of the diameter, and the support shaft 190 is fixed to the guide pipe 200. Thereby, the reflecting plate 100 rotates as indicated by an arrow P around the support shaft 190.

  Further, a rod-like piece 230 is fixed to the center C of the back surface 100a of the reflection 100 at a predetermined angle θ (for example, 45 °). A first connecting rod 232 is connected to the rod-shaped piece 230 via a first spherical sliding hinge 240, and a second connecting rod is connected to the first connecting rod 232 via a second spherical sliding hinge 241. 233 is connected.

  The other end of the guide pipe 200 is closed by an end surface 201, and an opening through which the second connecting rod 233 can be inserted is opened in the end surface 201, and the second connecting rod 233 extends outside from the opening. . A connecting rod driving means 235 for moving the second connecting rod 233 in the direction of arrow H along the axis of the guide pipe is attached to the outside of the end surface 201. The connecting rod driving means 235 can be constituted by a motor 236 and a rack gear 237, for example.

  As shown in FIG. 6A, when the second connecting rod 233 is moved in the direction of the arrow Ha, the first connecting rod 232 is also moved in the same direction, and the rod-shaped piece is interposed via the first spherical sliding hinge 240. 230 tilts in the direction of arrow L about the support shaft 190. Accordingly, as shown in FIG. 6B, the reflecting plate 100 rotates in the direction indicated by the arrow Pa. At this time, the first spherical sliding hinge 240 is slightly lowered in the lower left direction in the drawing from the initial position shown in FIG. 5A, and the first connecting rod 232 is also moved as shown in FIG. 6B. The end of one spherical sliding hinge 240 is slightly lowered. Therefore, the second spherical sliding hinge 241 absorbs the lowering of the first connecting rod 232.

  Although illustration is omitted, when the second connecting rod 233 is moved to the opposite side to the arrow Ha from this state, the reflecting plate 100 rotates to the opposite side to the arrow Pa.

  The microwave M transmitted from the antenna 120 and reflected by the reflecting plate 100 is sent in the left-right direction in the figure by the rotation of the reflecting plate 100 in the direction of arrow P accompanying the movement of the second connecting rod 233. .

  The guide pipe 200 is configured to be rotatable about the axis thereof in the direction of the arrow Q for each of the second containers 140 that house the antenna 120 and the microwave transmission / reception means 110, and the reflector 100 is similarly configured accordingly. The microwave M is sent in a direction perpendicular to the paper surface. The guide pipe 200 can be rotated by a motor 205 provided outside the end surface 201, and the rotation axis of the motor 205 is provided on an extension line of the axis of the guide pipe 200. Further, the motor 205 is accommodated in the container 208 together with the connecting rod driving means 235.

  Thus, the microwave M can be scanned in a two-dimensional direction by the movement of the second connecting rod 233 and the rotation of the guide pipe 200.

  Support members 260 and 261 are disposed on both sides of the first container 130. The support members 260 and 261 fit a bearing on the outer periphery of the guide pipe 200 to rotatably support the guide pipe 200, and further maintain airtightness inside the container with a seal member. Note that the seal member desirably has heat resistance. The inside of the first container 130 has the same gas pressure as the inside of the furnace through the opening 2 of the furnace at the time of measurement, and a considerably high pressure. Therefore, the first container 130 can be protected by sharing the pressure with the support members 260 and 261, and it is not necessary to provide a separate prevention device for the guide pipe 200.

  Further, the first container 130 can be provided with a window 137 so that nitrogen gas can flow from the nitrogen gas inlet 135 and the inside can be observed.

  Further, the guide pipe 200 may be provided with nitrogen gas intake ports 136 a and 136 b so that the nitrogen gas flows into the guide pipe 200.

  In the above, the guide pipe 200 is divided by the antenna side wall surface 130a of the first container 130, and the antenna side portion is joined to the first container 130 by welding or the like, and the end surface of the guide pipe 200 is connected from the first container 130. The part up to 201 can also be made rotatable, and in that case, the support member 261 that holds the part on the antenna side can be omitted.

  Although not shown, a small hole is formed in the antenna 120 so as not to affect microwave transmission / reception, and the nitrogen gas inlet 136a is placed near the back surface of the antenna 120 (surface on the microwave transmission / reception means side). By providing the nitrogen gas, the inside of the guide pipe 200 flows into the first container 130 through the small hole of the antenna 120 and dust on the back surface of the antenna 120 can be removed.

  Further, by making a similar small hole in the reflecting plate 100, the nitrogen gas from the nitrogen gas intake port 136a circulates to the back side of the reflecting plate 100, and the nitrogen gas from the nitrogen gas intake port 136b is transferred to the antenna side. The nitrogen gas is more easily distributed over the entire area of the guide pipe 200.

A Measuring unit 100 Reflector 101 Support arm 104 First spherical plain bearing 105 Connecting rod 106 Second spherical plain bearing 110 Microwave transmitting / receiving means 120 Antenna 130 First container 140 Second container 150 Waveguide 151 Plug member 160 Angle variable mechanism 161 Inner shaft 162 Outer shaft 170 First motor 172 Second motor 180 Third container 190 Support shaft 200 Guide pipe 210 Opening 220 Filter 230 Rod-like piece 232 First connecting rod 233 Second connection Rod 240 First spherical sliding hinge 241 Second spherical sliding hinge 260, 261 Support member

Claims (10)

A method for measuring the surface profile of a charge such as iron ore or coke charged in a blast furnace by microwaves,
An antenna connected to the microwave transmission / reception means and a reflection plate having a variable reflection angle are accommodated in a container, and the container is hermetically attached to an opening provided at an appropriate location in the upper part of the blast furnace, and the microwave emitted from the antenna is The surface of the charged object is scanned in a planar shape after being reflected by the reflector, and the microwave reflected by the surface is detected by the microwave transmitting / receiving means to obtain distance data corresponding to the scanning position and map it. The charge profile measuring method characterized by this. An apparatus for measuring the surface profile of a charge such as iron ore or coke charged in a blast furnace by microwaves,
The microwave transmission / reception means by a reflection plate having a variable reflection angle, an angle variable mechanism for controlling the reflection angle of the reflection plate, a microwave transmission / reception means, and a waveguide closed by a plug member made of a dielectric material. The reflector and the antenna are disposed opposite to each other in a container having an open surface, and the microwave transmitting / receiving means and the angle variable mechanism are accommodated in separate containers, respectively. A measuring unit attached in a state,
While controlling the driving of the angle variable means and the microwave transmitting and receiving means, and a controller for analyzing the detection signal,
The measurement unit is hermetically attached to the blast furnace so that the opening of the container overlaps with an opening provided at an appropriate position in the upper part of the blast furnace, and the microwave emitted from the antenna is reflected by the reflector and the surface of the charge The microwave reflected by the surface is detected by the microwave transmission / reception means, and distance data corresponding to the scanning position is obtained and mapped by the control unit. Input profile measuring device. In the measurement unit,
The reflecting plate is supported by the support member via the supporting shafts provided at both ends thereof so as to be rotatable about the supporting shaft, and on the surface of the reflecting plate opposite to the antenna facing surface, the supporting plate is supported. A rod-shaped piece that moves on a straight line orthogonal to the axis,
The reflector is moved in the first direction around the support shaft by moving the bar-shaped piece, and the support member is rotated in the second direction around the axis,
The insert according to claim 2, wherein the angle of reflection of the microwave by the reflector is controlled by combining rotation in the first direction and rotation in the second direction. Profile measuring device. The rod-like piece hangs from the tip of a connecting rod that moves along the axis of the waveguide toward the back surface of the reflector,
The support member is fixed to the tip of the inner shaft of the shaft tube having a double structure of the inner shaft and the outer shaft, the connecting rod is fixed to the outer shaft, and the inner shaft is rotated around the axis. 4. The insert profile measuring device according to claim 3, further comprising driving means for moving the outer shaft along the axis.   5. The insert profile measuring apparatus according to claim 3, wherein a nitrogen gas inlet is provided in the container that accommodates the reflector and the antenna to allow nitrogen gas to flow therein. In the measurement unit,
In the opening of the guide pipe in which an opening facing the opening of the blast furnace is formed, a reflector is rotatably supported via support shafts provided at both ends thereof.
One end of a rod-like piece is fixed at the center of the surface opposite to the antenna-facing surface of the reflector, and the other end of the rod-like piece is connected to a connecting rod that can move in the axial direction of the guide pipe,
The reflector is moved in the first direction around the support shaft by moving the connecting rod, and the guide pipe is rotated in the second direction around the axis,
The insert according to claim 2, wherein the angle of reflection of the microwave by the reflector is controlled by combining rotation in the first direction and rotation in the second direction. Profile measuring device. The opening of the guide pipe is formed at the center in the longitudinal direction of the guide pipe,
An antenna is connected to one end of the guide pipe, and driving means for moving the connecting rod and driving means for rotating the guide pipe are attached to the outside of the end face closing the other end. The insert profile measuring device according to claim 6, wherein A container surrounding the reflector and the periphery of the opening of the guide pipe;
A support member provided with a pair of bearings disposed on both outer sides of the container and supporting the guide pipes projecting on both sides of the container and a seal member for maintaining airtightness of the container. The insert profile measuring device according to claim 7.   The guide pipe is divided at the antenna side wall surface of the container, a portion of the guide pipe protruding from the container toward the antenna is joined to the container, and the other portion protruding from the container is supported by the support member. The insert profile measuring device according to claim 8, wherein: A hole that does not affect transmission / reception of microwaves is formed in at least one of the antenna and the reflector, and a nitrogen gas inlet is provided in the guide pipe to allow nitrogen gas to flow. The insert profile measuring device according to any one of the preceding claims.

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