JP5697528B2 - Sintered raw material sampling apparatus and sintered raw material sampling method - Google Patents

Description

  The present invention relates to a sampling apparatus and method for sampling a sintered raw material sample from a raw material layer of a sintered raw material charged in a sintering machine.

  In the iron ore sintering method of the Dwightroid method (DL type), the powdered coke in the sintered raw material is ignited by filling the sintered raw material mixed on the pallet and sucking air from below the pallet. The burned zone proceeds downward from the upper surface of the raw material layer, and a sintering reaction is performed.

  The sintering raw material is composed of fine iron ore and fine coke having a particle size of several μm to several mm, and auxiliary materials such as limestone and quicklime, and is granulated into pseudo particles of about several mm using water or the like. . The progress of the sintering reaction depends on the mixing ratio of the sintering raw material and the gas permeability, and the gas permeability is affected by the filling state of the sintering raw material on the pallet, the porosity, the particle size, and the like. For this reason, the sintering reaction can be promoted and the productivity of the sintered ore can be improved by appropriately adjusting the blending distribution, particle size distribution, and the like of the sintering raw material on the pallet.

  Therefore, for the operation management of the sintering machine, the packing state (mixing distribution, density distribution, particle size distribution, porosity distribution, etc.) of the layered sintered raw material charged on the sintering machine pallet is grasped. That is important. In order to grasp the filling state of the sintering raw material, it is necessary to sample a sample from the raw material layer of the sintering raw material charged in the sintering machine, and the following technique is disclosed as the sampling method.

  In Patent Document 1, a cylindrical sampling rod having openings on the front and rear surfaces is inserted into a raw material layer in the vertical direction before the ignition furnace of the sintering machine, and then the sampling rod is rotated in the horizontal direction. Describes a core sampling method in which the sample is filled into the sampling rod. Patent Document 2 describes a method in which a sampling rod is inserted into a raw material layer and core sampling is performed before the ignition furnace, and a charging density of the sintered raw material is measured by X-ray irradiation.

  In Patent Document 3, a sample of a sample is sampled by embedding a cylindrical double tube with a drop lid inside in a raw material layer before the ignition furnace and taking out the cylindrical double tube after sintering. How to do is described. Furthermore, Patent Document 4 describes a method of collecting a sintering raw material using a sample box before charging on a pallet.

Japanese Utility Model Publication No. 56-13639 JP 61-7450 A Japanese Utility Model Publication No. 61-98996 JP 2002-2852 A

  However, in the sampling methods described in Patent Documents 1 and 2, since the sintered raw material is consolidated in the sampling rod during sampling, the filling state of the sintered raw material on the pallet (mixing distribution of raw material, density distribution, There was a problem that the particle size distribution, porosity distribution, etc.) could not be measured accurately. For example, in the technique of Patent Document 1, when the sampling rod is rotated in the horizontal direction, the sampling sample inside thereof is consolidated by the flow of the raw material layer passing through the rod. Further, in the technique of Patent Document 2, when the sampling rod inserted into the raw material layer is pulled out in the vertical direction, if the sintered raw material in the rod is not compacted, it will fall due to gravity. Cannot be collected.

  Also, in the sampling method of Patent Document 3, the sintered raw material cannot be accurately measured because the sintered raw material is consolidated by a drop lid inside the cylindrical double tube. In addition, the method of taking out the cylindrical double tube after the sintering reaction is adopted, but the sintering raw material inside the cylindrical double tube may also be sintered or deteriorated by the heat of the sintering reaction. It is impossible to accurately grasp the filling state of the sintering raw material. Further, in the sampling method of Patent Document 4, since the sintered raw material is collected in the middle of charging, the porosity and particle size distribution of the sintered raw material on the pallet cannot be measured.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to compact a sintered raw material sample from a raw material layer of a sintered raw material charged in a sintering machine. It is an object of the present invention to provide a new and improved sintered raw material sampling apparatus and method capable of sampling without any problem and accurately grasping the filling state of the sintered raw material.

In order to solve the above problems, according to one aspect of the present invention, in a sampling device for collecting a sample of a sintered raw material from a raw material layer of a sintered raw material charged in a sintering machine, an opening is provided at the lower end. A sampling tube, an elevating mechanism that moves the sampling tube up and down and inserts and removes it from the raw material layer, a bottom lid for closing the opening at the lower end of the sampling tube, and a circular lid that rotates the bottom lid. A pivot mechanism that pivots along a movement locus, and the pivot mechanism includes an arm that is pivotally connected to a pivot shaft and supports the bottom cover, By rotating the bottom lid together with the arm, turning the bottom lid downward, placing it in the closed position to close the opening of the sampling tube, and turning the bottom lid upward, It is arranged at a retracted position separated from the sampling tube. That, in the sintering material sampling device is provided.

  The lower end of the sampling tube may be formed in an arc shape along the rotation trajectory of the bottom lid.

  The bottom cover may be formed of a curved plate having a radius of curvature corresponding to the rotation trajectory of the bottom cover.

The arm may have a plate shape parallel to the rotation direction of the bottom lid.

  The rotating mechanism may be connected to an upper end of the sampling tube, and the sampling tube, the rotating mechanism, and the bottom cover may be integrally moved up and down by the lifting mechanism.

  One or more slits for inserting a partition plate may be formed on the side surface of the sampling tube.

  The sampling tube may include a side opening formed on a side surface of the sampling tube and a cover that can be attached to and detached from the side opening.

  You may make it further provide the mount which moves the main-body part of the sampling apparatus containing the said collection pipe | tube, the said raising / lowering mechanism, the said bottom cover, and the said rotation mechanism in the width direction of the said sintering machine.

  In order to solve the above-described problem, according to another aspect of the present invention, the sintering raw material layer is formed from a sintering raw material layer charged in a sintering machine using the sintering raw material sampling device. In the sampling method for collecting a sample, in the state where the sampling tube of the sampling device is disposed above the raw material layer, and in the state where the bottom lid is disposed at a retracted position separated from the sampling tube, the lifting mechanism causes the A step of lowering the sampling tube and inserting it into the raw material layer; a step of rotating the bottom lid downward by the rotating mechanism to dispose the opening of the sampling tube at a closed position; And a step of raising the sampling tube by the elevating mechanism and pulling it out from the raw material layer in a state where the opening is closed by the bottom cover. The law is provided.

  In the step of inserting the sampling tube into the raw material layer, the sampling tube may be inserted without rotating.

  After pulling out the sampling tube from the raw material layer, inserting the partition plate into a plurality of slits formed on the side surface of the sampling tube; removing the partition plate in order from the lower end side of the sampling tube; And a step of taking out a sample of the sintered raw material.

After extracting the sampling tube from the raw material layer, moving a cover that covers the side opening formed on the side surface of the sampling tube to expose at least a part of the side opening;
The method may further include a step of inserting a partition plate into the exposed side opening and taking out a sample of the sintering raw material between the partition plate and the bottom cover.

  According to the sampling apparatus and method described above, the lower end of the sampling tube charged in the raw material layer when the sampling tube is charged in the raw material layer of the sintering raw material charged in the sintering machine and the sample is collected. In a state where the opening is closed by the bottom lid, the sampling tube is pulled up together with the bottom lid. Thereby, even if the sample is not consolidated in the collection tube, the columnar sample can be prevented from falling from the collection tube by its own weight when the collection tube is pulled out from the raw material layer. Therefore, an appropriate sample representing the actual filling state of the raw material layer of the sintered raw material can be collected without being consolidated.

  As described above, according to the present invention, the sintered raw material sample is sampled from the raw material layer of the sintered raw material charged in the sintering machine without being consolidated, and the filling state of the sintered raw material is accurately grasped. can do.

It is a mimetic diagram showing a sintering machine concerning an embodiment concerning a 1st embodiment of the present invention. It is an enlarged view which shows the periphery structure of the charging apparatus of the sintering raw material in the sintering machine 1 concerning the embodiment. It is a perspective view which shows the whole structure of the sampling apparatus which concerns on the same embodiment. It is the perspective view which looked at the extraction tube concerning the embodiment from the lower part. It is a side view which shows the main-body part of the sampling apparatus which concerns on the same embodiment. It is an enlarged side view which shows the rotation mechanism of the sampling device which concerns on the same embodiment. It is an enlarged side view which shows the rotation mechanism of the sampling device which concerns on the same embodiment. It is process drawing which shows the sampling method using the sampling apparatus which concerns on the same embodiment. It is a perspective view which shows the collection tube and partition plate which were extracted from the raw material layer which concerns on the same embodiment. It is a perspective view which shows the whole structure of the sampling device which concerns on the 2nd Embodiment of this invention. It is a perspective view which shows the collection tube which concerns on the same embodiment. It is a bottom view which shows the collection pipe concerning the embodiment. It is AA sectional drawing of FIG. It is process drawing which shows the procedure which covers the side surface opening part of the collection tube which concerns on the embodiment with a cover. It is process drawing which shows the procedure which takes out a columnar sample from the side surface opening part of the collection tube which concerns on the embodiment. It is process drawing which shows the procedure which takes out a columnar sample from the side surface opening part of the collection tube which concerns on the embodiment. It is a bottom view which shows operation | movement of the partition plate inserted in the collection tube concerning the embodiment. It is a graph which shows the collection | recovery ratio of the sintering raw material of the reference example, a present Example, and a comparative example measured by the insertion test of the collection pipe | tube which concerns on a present Example. It is a graph which shows the relationship between the collection | recovery ratio of the sintering raw material measured by the insertion main test of a collection pipe | tube which concerns on a present Example, and the diameter of a collection pipe | tube.

  Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

<1. First Embodiment>
First, the sampling device and the sampling method according to the first embodiment of the present invention will be described in detail.

[1.1. Overall configuration of sintering machine]
Initially, with reference to FIG. 1, the whole structure of the sintering machine which concerns on this embodiment is demonstrated. FIG. 1 is a schematic view showing a sintering machine 1 according to the present embodiment.

  A sintering machine 1 according to the present embodiment is, for example, a Dwightroid (DL) type sintering machine, and sinters a sintered raw material to produce a sintered ore that is a blast furnace raw material. Sintering raw materials are powdered iron ore and coke having a particle size of several μm to several mm, auxiliary raw materials (raw materials for adjusting basicity such as limestone and quicklime), iron-making dust and return mineral, etc. It is blended by ratio. The sintered raw materials in which these are blended are mixed by a mixer (not shown) provided in the preceding stage of the sintering machine 1 and then several mm using water or the like by a granulator (not shown). The quasi-particles are granulated and supplied to the sintering machine 1.

  As shown in FIG. 1, the sintering machine 1 includes a charging device 2, a pallet 3, a conveyor 4, an ignition furnace 5, a wind box 6, a main duct 7, a cyclone dust collector 8, and a wind exhauster 9. Etc.

  The charging device 2 is provided at the end of the sintering machine 1 and charges the granulated sintered raw material onto the pallet 3. The pallet 3 is composed of a plurality of carts 3 a connected endlessly so as to be able to go around the conveyor 4. The pallet 3 has a U-shaped groove having a bottom plate and a side wall, and on the conveyor 4, the longitudinal direction of the sintering machine 1 (x direction: hereinafter referred to as the sintering machine longitudinal direction). The pallet 3 connected to the above forms a charging space for the sintering raw material. The pallet 3 is filled with a sintering raw material to form a raw material layer 10 extending in the longitudinal direction of the sintering machine. The conveyor 4 conveys the individual carts 3a constituting the pallet 3 from the charging position of the sintering raw material to the discharging position of the sintered ore. The ignition furnace 5 is provided above the pallet 3 adjacent to the charging device 2. The ignition furnace 5 includes an ignition burner 5a, and ignites the raw material layer 10 charged on the pallet 3 from the upper surface side.

  A plurality of window boxes 6 are arranged below the pallet 3 along the longitudinal direction of the sintering machine, and the lower ends of these window boxes 6 communicate with the main duct 7. A cyclone dust collector 8 and a wind exhauster 9 are provided at the end of the main duct 7. By sucking the air in the main duct 7 by the air exhauster 9, the air in the raw material layer 10 is sucked into the main duct 7 through the wind box 6, removed from the dust by the cyclone dust collector 8, and then discarded from the chimney 11. The In addition to the cyclone dust collector 8 and the exhaust fan 9, the exhaust system of the sintering machine 1 may be provided with an exhaust gas treatment device such as an electric dust collector or a dry desulfurization device.

  In the sintering machine 1 configured as described above, the raw material layer 10 is formed by charging the sintering raw material onto the pallet 3 by the charging device 2 while conveying the pallet 3 in the longitudinal direction of the sintering machine by the conveyor 4. . Then, the upper surface of the raw material layer 10 is ignited by the ignition furnace 5 while air is sucked from below the pallet 3 by the exhaust fan 9. As a result, the combustion zone 12 ignited in the powder coke in the raw material layer 10 advances from the upper layer to the lower layer of the raw material layer 10 to perform a sintering reaction. That is, after the raw material layer 10 passes through the ignition furnace 5, as the strand progresses, sintering is completed from the upper layer of the raw material layer 10 and solidifies, and the solidified product is cooled to form a sinter cake. . The upper part of the combustion zone 12 is a sinter cake, and the lower part of the combustion zone 12 is still a raw material. When the end of the sintering machine 1 on the exhaust side is reached, all the sintering reactions of the raw material layer 10 are completed and a sintered ore is produced. It is crushed by the crusher 13 provided.

  Here, with reference to FIG. 2, the structure of the charging apparatus 2 of the sintering raw material in the sintering machine 1 will be described in detail. FIG. 2 is an enlarged view showing the peripheral structure of the sintering raw material charging device 2 in the sintering machine 1 according to the present embodiment.

  As shown in FIG. 2, the charging device 2 includes a hopper 21, a drum feeder 22, a supply amount adjusting device 23, a chute 24, and a sieve 25. The sintering raw material 14 charged in the sintering machine 1 is stored in a hopper 21, cut out by a drum feeder 22 arranged at the lower part thereof, dropped onto a chute 24, and conveyed onto a sieve 25. Is done. At this time, the supply amount of the sintering raw material 14 from the hopper 21 to the chute 24 is adjusted by the supply amount adjusting device 23.

  The sintered raw material 14 slid on the chute 24 and conveyed to the sieve 25 is charged onto the pallet 3 while being classified according to the particle size by the sieve 25 to form the raw material layer 10. The sieve 25 is composed of a plurality of bar members 25a that are inclined and disposed in the direction opposite to the conveying direction of the pallet 3. The upper ends of these bar members 25a are bundled directly below the chute 24, and the distance between the plurality of bar members 25a increases as the distance from the chute 24 increases. With the comb-like structure sieve 25, the vertical direction (z direction) of the sintering machine 1 and the width direction of the sintering machine 1 with respect to the sintering raw material 14 charged on the pallet 3 of the sintering machine 1. Grain segregation in the y direction (hereinafter referred to as the sintering machine width direction) can be imparted.

  That is, when the sintered raw material 14 falls from the gap of the sieve 25, the sintered raw material 14b having a relatively small particle size falls from the upper end side (root side) of the sieve 25, and the sintered raw material 14a having a relatively large particle size. It falls from the lower end side (front end side) of the sieve 25 so that it is so. For this reason, the sintered raw material 14a having a large particle size reaches the upstream side in the conveying direction of the pallet 3, and the sintered raw material 14b having a small particle size is deposited on the upper portion of the sintered raw material 14a having the large particle size. . As a result of charging the sintering raw material 14 using the sieve 25 in this way, the raw material layer 10 formed on the pallet 3 has a particle size distribution in the vertical direction, and the particle size increases toward the lower side. By forming the raw material layer 10 having such a particle size distribution, the air permeability of the raw material layer 10 on the pallet 3 is improved, and the sintering reaction can be promoted.

  Moreover, in the said sieve 25, the particle size distribution can also be provided in the raw material layer 10 also in this width direction by controlling the clearance gap between the some bar material 25a in a sintering machine width direction. By appropriately adjusting the particle size distribution in the width direction, the air permeability of the center portion and both end portions of the raw material layer 10 in the width direction can be made uniform, so that the progress deviation of the sintering reaction in the width direction can be prevented.

  As described above, in the sintering machine 1, when the sintering raw material 14 is charged into the pallet 3, the charging conditions of the sintering raw material 14 are set so that the filling state such as the particle size distribution is appropriate. Be controlled. However, in the actual operation, the filling state of the sintering raw material 14 charged in the sintering machine 1 may not be a desired state due to various factors.

  Therefore, in the sintering machine 1 according to the present embodiment, in order to measure the filling state of the actual sintered raw material 14 (filling density distribution, porosity distribution, particle size distribution, raw material mixture distribution, etc.), from the raw material layer 10. A sampling device 100 for collecting a sample of the sintering raw material 14 is installed. As shown in FIG. 2, the sampling device 100 is provided at an intermediate position between the charging device 2 and the ignition furnace 5, and from the raw material layer 10 of the sintering raw material 14 before ignition charged in the pallet 3, A sample (eg, a columnar sample) is taken. Hereinafter, the sampling apparatus 100 will be described in detail.

[1.2. Configuration of sampling device]
Next, the configuration of the sampling device 100 in the sintering machine 1 according to this embodiment will be described. As described above, most of the conventional sampling apparatuses have a mechanism that, when taking a columnar sample from the raw material layer 10 of the sintering raw material, compacts the sintering raw material in the sample. If the sintered raw material is consolidated in this way, it is difficult to accurately grasp the filling state of the sintered raw material such as the particle size distribution and the porosity distribution in the raw material layer 10.

  Therefore, in this embodiment, a sampling device 100 is provided that can collect a columnar sample of a sintered raw material from the raw material layer 10 on the pallet 3 without compacting. In addition, the sampling apparatus 100 according to the present embodiment can clearly determine which part in the height direction of the raw material layer 10 the collected columnar sample corresponds to, and the sintering machine width of the raw material layer 10. It is also possible to take a columnar sample from any position in the direction.

[1.2.1. Overall configuration of sampling device]
First, the overall configuration of the sampling apparatus 100 according to the present embodiment will be described with reference to FIG. FIG. 3 is a perspective view showing the overall configuration of the sampling apparatus 100 according to the present embodiment.

  As shown in FIG. 3, the sampling apparatus 100 includes a main body 110 that is erected in the vertical direction and a pedestal 120 that supports the main body 110 so as to be movable in the sintering machine width direction. The main body 110 includes a cylindrical collection tube 130 for collecting a columnar sample from the raw material layer 10, a lifting mechanism 140 for raising and lowering the collection tube 130, and a bottom for closing an opening 131 at the lower end of the collection tube 130. A lid 150 and a rotation mechanism 160 that rotates the bottom lid 150 along an arcuate rotation locus are provided. Below, each part of the sampling apparatus 100 is demonstrated.

[1.2.2. Mounting structure]
First, the structure of the gantry 120 of the sampling apparatus 100 will be described. As shown in FIG. 3, the gantry 120 is constructed so as to straddle the pallet 3 in the sintering machine width direction (y direction), and supports the main body 110 of the sampling device 100 so as to be movable in the sintering machine width direction. The gantry 120 may be fixedly installed at a predetermined location of the sintering machine 1, or may be transported by transporting means such as a crane and mounted at an appropriate position. In the latter case, it is preferable to connect the gantry 120 and the surrounding structure so that the main body 110 and the gantry 120 do not fall down.

The gantry 120 in the illustrated example includes a horizontal member 121 disposed horizontally in the sintering machine width direction above the pallet 3, and a pair of legs 122 that support both ends of the horizontal member 121 outside the pallet 3. Composed. The horizontal member 121 is engaged with the lower end of the main body 110 standing in the vertical direction, and functions as a guide rail that guides the movement of the main body 110 in the width direction of the sintering machine. An operator may manually move the main body 110 in the sintering machine width direction, or may move the main body 110 using the power of a drive source (not shown) such as an electric motor. . In the latter case, the horizontal member 121 is provided with a power transmission mechanism. In addition, a hydraulic mechanism (not shown) for driving a lifting mechanism 140 and the like which will be described later may be disposed in the vicinity of the leg portion 122.

With the gantry 120 having the above structure, the main body 110 can be moved to an arbitrary position in the sintering machine width direction. Thereby, the main body 110 can collect a sample from an arbitrary position of the raw material layer 10 in the width direction of the sintering machine. Therefore, it is possible to measure the filling state of the raw material layer 10 in the width direction of the sintering machine (mixing distribution of raw materials, density distribution, particle size distribution, porosity distribution, etc.).

  In addition, in the example of FIG. 3, although it was the gantry structure which mounts the main-body part 110 on the horizontal member 121, this invention is not limited to this example. For example, the structure which suspends the main-body part 110 from the gate-type mount arrange | positioned so that the pallet 3 may be straddled may be sufficient. Further, in FIG. 3, the sampling device 100 is arranged so that the rotation direction of the bottom lid 150 is the longitudinal direction (x direction) of the sintering machine, but the rotation direction is the sintering machine width direction (y direction). The sampling device 100 may be arranged so that Further, the portal frame may have a structure in which the main body 110 is moved not only in the sintering machine width direction (y direction) but also in the sintering machine longitudinal direction (x direction). Further, the portal frame may have a structure in which the main body 110 is rotated around the vertical axis. Thereby, the direction in which the bottom lid 150 is rotated by a rotation mechanism 160 described later can be arbitrarily changed.

[1.2.3. Collection tube]
Next, the configuration of the sampling tube 130 of the sampling device 100 will be described with reference to FIG. FIG. 4 is a perspective view of the sampling tube 130 according to this embodiment as viewed from below.

  As shown in FIG. 4, the collection tube 130 has a substantially cylindrical shape with the upper end closed and the lower end open, and the inside is hollow. A circular opening 131 is provided at the lower end of the collection tube 130, and when the collection tube 130 is inserted into the raw material layer 10, a sintered raw material sample enters the collection tube 130 from the opening 131.

  In order to obtain a shape that minimizes resistance when inserted into the raw material layer 10, the sampling tube 130 has a cylindrical shape. The length of the collection tube 130 is appropriately adjusted according to the range and depth of collecting a sample of the sintered raw material 14 from the raw material layer 10. The thickness of the sampling tube 130 is preferably thin in order to reduce the insertion resistance, but when the slit 134 is provided in the sampling tube 130, it is necessary to ensure rigidity. For this reason, the thickness of the sampling tube 130 is preferably as thin as possible (for example, 2 mm) while ensuring rigidity. Furthermore, in order to reduce insertion resistance, it is preferable that the lower end part 132 (tip part) of the sampling tube 130 is sharpened.

  A plurality of slits 134 for inserting the partition plate 135 are provided on the side surface 133 of the sampling tube 130 at an equal pitch (for example, 100 mm) in the axial direction. The slit 134 is formed so as to extend in a direction perpendicular to the central axis 136 of the sampling tube 130. By inserting the partition plate 135 into the slit 134, the columnar sample of the sintered raw material 14 collected in the collection tube 130 can be divided perpendicularly to the axial direction.

  In addition, a connecting portion 137 for connecting the sampling tube 130 to the lifting mechanism 140 is provided at the upper end of the sampling tube 130. The connecting portion 137 in the illustrated example is a prism that protrudes from the upper surface of the sampling tube 130, and is formed with a through hole 138 for penetrating the pin. The connecting portion 137 of the sampling tube 130 is fitted into a rectangular hole drilled in the 140 lower joint 147 of the lifting mechanism, which will be described later, and a pin (not shown) is further inserted into the through hole 138, thereby collecting the sampling tube. 130 is connected to the lifting mechanism 140.

[1.2.4. Elevating mechanism]
Next, the configuration of the lifting mechanism 140 of the sampling tube 130 in the sampling device 100 according to this embodiment will be described with reference to FIGS. FIG. 5 is a side view showing the main body 110 of the sampling device 100 according to the present embodiment.

  As shown in FIGS. 3 and 5, the elevating mechanism 140 has a function of moving the sampling tube 130 up and down in the vertical direction and inserting / removing it into the raw material layer 10. The elevating mechanism 140 includes a guide column 141 extending in the vertical direction, an elevating cylinder 142, a fixing portion 143, an upper slider 144, a lower slider 145, an upper joint 146, and a lower joint 147.

  The guide column 141 is erected on the horizontal member 121 of the gantry 120 and functions as a guide rail for moving the sampling tube 130 up and down. The elevating cylinder 142 is a drive source for elevating the collection tube 130. The upper end of the elevating cylinder 142 is fixed to the upper end of the guide column 141 by a fixing portion 143, and the lower end of the elevating cylinder 142 is connected to the upper end of the sampling tube 130 via the lower slider 145 and the lower joint 147.

  The upper slider 144 and the lower slider 145 move up and down along the guide column 141 as the lifting cylinder 142 expands and contracts. The upper joint 146 is a member for attaching a later-described rotation mechanism 160 to the lifting mechanism 140, and is connected to the upper slider 144 and the upper end of the rotation mechanism 160. The lower joint 147 is a member for attaching the sampling tube 130 to the lifting mechanism 140, and is connected to the lower slider 145, the lower end of the rotation mechanism 160, and the upper end of the sampling tube 130.

  The configuration of the lifting mechanism 140 according to the present embodiment has been described above. Next, the operation of the lifting mechanism 140 will be described.

  When the elevating cylinder 142 is extended, the upper slider 144 and the lower slider 145 are lowered along the guide pillar 141. As a result, the sampling tube 130, the bottom lid 150, and the rotation mechanism 160 connected to the sliders 144 and 145 are integrally lowered downward. As a result, the sampling tube 130 is inserted into the raw material layer 10 below the sampling device 100, and the sample is filled into the sampling tube 130 through the opening 131 at the lower end of the sampling tube 130.

  Thereafter, when the elevating cylinder 142 is contracted, the upper slider 144 and the lower slider 145 rise along the guide pillar 141. As a result, the sampling tube 130, the bottom lid 150, and the rotation mechanism 160 connected to the sliders 144 and 145 are integrally raised upward, and as a result, the sampling tube 130 is pulled out from the raw material layer 10. As described above, the elevating mechanism 140 moves the sampling tube 130 together with the bottom lid 150 and the rotation mechanism 160 in the vertical direction, inserts the sampling tube 130 into the raw material layer 10, or moves the sampling tube 130 from the raw material layer 10. It can be pulled out.

If the lifting cylinder 142 alone is not sufficient for the lifting stroke, an extension guide mechanism (not shown) for lifting the guide pillar 141 itself may be additionally installed. The extension guide mechanism may include a support member that supports the guide column 141 so as to be movable up and down, and an extension cylinder that is a drive source for moving the guide column 141 up and down. By providing such extension guide mechanism, the lifting stroke of the extraction tube 130 can be greatly extended.

[1.2.5. Bottom cover and rotation mechanism]
Next, the configuration of the bottom lid 150 and the rotation mechanism 160 of the bottom lid 150 in the sampling apparatus 100 according to the present embodiment will be described with reference to FIGS. 6A and 6B are enlarged side views showing the rotation mechanism 160 of the sampling device 100 according to this embodiment.

  As shown in FIGS. 3 and 5, the bottom lid 150 is composed of a plate-like member having an area larger than the opening 131 formed at the lower end of the sampling tube 130, and has a function of closing the opening 131. Have. The shape of the bottom lid 150 in the illustrated example is, for example, a substantially rectangular curved plate shape. However, the shape is not limited to this example, and the bottom lid 150 has a substantially disc shape as long as the opening portion 131 can be closed. Any shape such as an ellipse may be used. The bottom lid 150 is supported so as to be rotatable about a rotation shaft 161 via an arm 163 of a rotation mechanism 160 described later.

  By closing the opening 131 of the sampling tube 130 with the bottom lid 150 having such a structure, when the sampling tube 130 is pulled out from the raw material layer 10, the columnar sample of the sintered raw material 14 therein does not fall out of the opening 131. Can be. Therefore, when the columnar sample is sampled by inserting the sampling tube 130 into the raw material layer 10, the columnar sample can be sampled without being compacted while maintaining the porosity distribution, density distribution, etc. in the actual raw material layer 10. .

  As shown in FIGS. 6A and 6B, the rotation mechanism 160 has a function of rotating the bottom lid 150 along an arcuate rotation locus. The rotation mechanism 160 is disposed at a closed position (see FIG. 6B) that closes the opening 131 of the sampling tube 130 by rotating the bottom lid 150 downward about the rotation shaft 161. Further, the rotation mechanism 160 is disposed at a retracted position (see FIG. 6A) separated from the sampling tube 130 by rotating the bottom lid 150 upward about the rotation shaft 161. In this way, the opening 131 of the sampling tube 130 can be opened and closed using the bottom lid 150 in the raw material layer 10 by rotating the bottom lid 150 along the arcuate rotation locus by the rotation mechanism 160. .

  The structure of the rotation mechanism 160 will be described in detail. As shown in FIGS. 5, 6 </ b> A, and 6 </ b> B, the rotation mechanism 160 includes a rotation shaft 161, a rotation cylinder 162, an arm 163, and a link mechanism 164. The link mechanism 164 includes three link members 165A, 165B, and 165C that are rotatably connected to each other, and four rotation shafts 166A, 166B, 166C, and 166D.

  The rotation shaft 161 is a central axis when the bottom lid 150 is rotated along an arcuate locus. The rotation shaft 161 rotatably connects the link member 165C to the lower joint 147 of the lifting mechanism 140 described above. The rotating shaft 161 is disposed above the upper end of the sampling tube 130. Accordingly, when the bottom lid 150 is pivoted upward and retracted (see FIG. 6A), the bottom lid 150 can be positioned sufficiently above the upper surface of the raw material layer 10, and the bottom lid 150 and the raw material Contact with the layer 10 can be avoided.

The rotation cylinder 162 is a drive source for rotating the bottom lid 150. The upper end of the rotating cylinder 162 is rotatably connected to the upper joint 146 of the elevating mechanism 140 by a rotating shaft 166D. Also, the lower end of the rotating cylinder 162, the link member 165A of the link mechanism 164 is pivotally connected by pivot shaft 166A with respect to 165C.

  The arm 163 has a function of rotatably supporting the bottom lid 150. The arm 163 is configured by a plate-like member parallel to the rotation direction of the bottom lid 150 and is connected to the rotation shaft 161 so as to be rotatable. An end of a link member 165B is rotatably connected to the upper rear end of the arm 163 by a rotary shaft 166C, and the lower rear end of the arm 163 is rotated to the rotary shaft 161 via the link member 165C. It is connected freely. The arm 163 rotates together with the bottom cover 150 around the rotation shaft 161.

  The link mechanism 164 has a function of converting the linear operation of the rotating cylinder 162 into a rotating operation in an arcuate locus of the bottom cover 150. Both ends of the link member 165A of the link mechanism 164 are rotatably connected to the rotation cylinder 162 and the lower joint 147 by the rotation shafts 166A and 166B, respectively. Further, both ends of the link member 165B are rotatably connected to the rotation cylinder 162 and the arm 163 by rotation shafts 166A and 166C, respectively. Further, one end of the link member 165C is rotatably connected to the lower joint 147 by the rotation shaft 161, and the other end of the link member 165C is fixed to the arm 163.

  The link members 165A, 165B, 165C and the arm 163 of the link mechanism 164, the rotation shafts 166A, 166B, 166C, and the rotation shaft 161 constitute a square link. Thereby, when the rotation cylinder 162 is extended, the bottom lid 150 is rotated downward along an arc-shaped locus centering on the rotation shaft 161 together with the arm 163 by the square link, and is positioned at the closed position ( (See FIG. 6B.) On the other hand, when the rotating cylinder 162 contracts, the bottom lid 150 rotates together with the arm 163 along an arcuate locus centering on the rotating shaft 161 by the square link, and is positioned at the retracted position (see FIG. 6A).

The rotation mechanism 160 configured as described above is inserted into the raw material layer 10 by rotating the bottom lid 150 along an arcuate locus. In order to reduce the resistance at this time, it is preferable that the thickness of the bottom cover 150 is thin, and it is preferable that the front end of the bottom cover 150 in the insertion direction is sharpened. In addition, in order to further reduce the resistance, the bottom cover 150 is preferably formed of a curved plate having a predetermined radius of curvature R ₁ corresponding to the arcuate rotation trajectory of the bottom cover 150. In particular, it is more preferable that the curvature radius R ₁ of the bottom lid 150 is the same as the curvature radius R ₂ of the arcuate rotation trajectory of the bottom lid 150. Thereby, the resistance when inserting the bottom lid 150 into the raw material layer 10 while rotating along the arcuate locus can be minimized. Therefore, the driving force of the rotation mechanism 160 can be suppressed, and the columnar sample of the sintered raw material 14 in the sampling tube 130 can be suitably prevented from being consolidated by the rotation operation of the bottom lid 150.

  Further, in order to reduce the resistance when the arm 163 is rotated together with the bottom lid 150 and inserted into the raw material layer 10, it is preferable that the thickness of the arm 163 is thin, and further, the arm 163 is forward in the rotation direction. The side edge 163a is also preferably sharpened. Thus, by forming the arm 163 into a blade shape, the resistance when the arm 163 is inserted into the raw material layer 10 can be minimized, so that the driving force of the rotation mechanism 160 can be further suppressed.

As shown in FIGS. 6A and 6B, the lower end 132 of the sampling tube 130 is formed in an arc shape along an arcuate rotation trajectory of the bottom lid 150. In particular, the curvature radius R ₃ of the lower end portion 132 of the sampling tube 130 is preferably the same as the curvature radius R ₂ of the arcuate rotation trajectory of the bottom cover 150, and is also the same as the curvature radius R ₁ of the bottom cover 150. More preferably (R ₃ = R ₁ = R ₂ ). Thereby, when the bottom lid 150 is rotated downward, the bottom lid 150 does not collide with the lower end portion 132 of the sampling tube 130, and the arc-shaped bottom lid 150 causes the arc-shaped bottom end of the sampling tube 130 to fall. The part 132 can be closed without a gap.

If the curvature radius R ₁ of the bottom lid 150 itself and the curvature radius R ₂ of the arcuate rotation trajectory of the bottom lid 150 are the same as in this embodiment, the rotation axis 161 The position may be on the same side as the bottom lid 150 with respect to the central axis 136 of the sampling tube 130, or may be on the opposite side. In this case, even if the bottom cover 150 moves in the raw material layer 10 along the arcuate rotation trajectory, the surrounding raw material layer 10 is hardly affected. When the lower end 132 of the tube is closed, the sample in the collection tube 130 is not consolidated.

On the other hand, when the curvature radius R ₁ of the bottom cover 150 itself and the curvature radius R ₂ of the arcuate rotation locus of the bottom cover 150 are different, the position of the rotation shaft 161 is the center of the sampling tube 130. It is preferable to be on the opposite side of the bottom lid 150 with respect to the shaft 136. For example, as shown in FIGS. 6A and 6B, when the bottom lid 150 is on the right side of the central axis 136 of the sampling tube 130, the rotation shaft 161 is preferably on the left side of the central axis 136. When R1 and R2 are different, when the bottom lid 150 moves the raw material layer 10 medium along the arcuate rotation path, the radius of curvature of the radius of curvature R ₁ and the turning locus of the bottom cover 150 Due to the difference from R ₂ , the rotation of the bottom lid 150 causes the raw material layer 10 around the opening 131 to be consolidated to some extent.

  Therefore, in this case, when the rotating shaft 161 is on the same side as the bottom cover 150 with respect to the central axis 136 of the sampling tube 130, the rotating bottom cover 150 closes the lower end portion 132 of the sampling tube 130. The bottom lid 150 rotates obliquely upward. As a result, there is a possibility that the sample in the collection tube 130 is compacted by the rotation of the bottom lid 150. On the other hand, if the rotating shaft 161 is on the opposite side of the bottom cover 150 with respect to the central axis 136 of the sampling tube 130, the bottom cover 150 when the rotating bottom cover 150 closes the lower end 132 of the sampling tube 130 The lid 150 is rotated obliquely downward. Therefore, the sample in the collection tube 130 is hardly consolidated by the rotation of the bottom lid 150.

  The configuration of the rotation mechanism 160 of the bottom lid 150 according to the present embodiment has been described above. Next, the operation of the rotation mechanism 160 will be described.

  First, as shown in FIG. 6A, a state is considered in which the sampling tube 130 is inserted into the raw material layer 10 by the lifting mechanism 140 and the bottom lid 150 is disposed at a retracted position above the raw material layer 10. When the rotating cylinder 162 of the rotating mechanism 160 is extended in this state, the link mechanism 164 converts the extending operation of the rotating cylinder 162 into a rotating operation of the arm 163 around the rotating shaft 161. The As a result, as shown in FIG. 6A, the bottom lid 150 is rotated downward along an arcuate rotation trajectory and pushed into the raw material layer 10 together with the arm 163, and is in close contact with the lower end portion 132 of the sampling tube 130. It is positioned at the closing position. As a result, the opening 131 at the lower end 132 of the sampling tube 130 is closed with the bottom lid 150.

  Thereafter, when the sampling tube 130 is pulled out from the raw material layer 10 by the lifting mechanism 140, the rotation mechanism 160 is also pulled up together with the sampling tube 130. At this time, the rotation cylinder 162 of the rotation mechanism 160 applies power to the arm 163 so as to keep the bottom lid 150 pressed against the lower end portion 132 of the sampling tube 130, and is supported by the arm 163. The bottom lid 150 can maintain a state in which the opening 131 of the sampling tube 130 is closed.

[1.3. Sampling method]
Next, referring to FIG. 7 and FIG. 8, a sampling method for collecting the columnar sample 15 from the raw material layer 10 charged on the pallet 3 of the sintering machine 1 using the sampling device 100 according to the present embodiment. Will be described. FIG. 7 is a process diagram showing a sampling method using the sampling apparatus 100 according to the present embodiment. FIG. 8 is a perspective view showing the sampling tube 130 and the partition plate 135 extracted from the raw material layer 10 according to the present embodiment.

First, as shown in FIG. 7 (a), the body portion 110 of the sampling device 100 is disposed above the raw material layer 10 which is charged to the pallet 3 (S1). At this time, the main body 110 is moved in the sintering machine width direction on the horizontal member 121 of the gantry 120, and the sampling tube 130 is disposed above the position in the width direction where the columnar sample in the raw material layer 10 is to be collected. Thus, in the sampling method according to this embodiment, it is possible to collect a columnar sample from an arbitrary position in the sintering machine width direction.

  Next, as shown in FIG. 7 (b), with the bottom lid 150 still in the retracted position, the elevating mechanism 140 lowers the sampling tube 130, the bottom lid 150, and the rotation mechanism 160 in the vertical direction, The sampling tube 130 is inserted into the raw material layer 10 to a desired depth (S2). Thereby, the sintering raw material at a desired position of the raw material layer 10 is filled into the sampling tube 130 from the opening 131 at the lower end of the sampling tube 130 as the columnar sample 15. In the insertion step, the bottom lid 150 remains in the retracted position and is positioned above the upper surface of the raw material layer 10.

  In the insertion step S2 of the sampling tube 130, the sampling tube 130 is inserted into the raw material layer 10 without rotating the sampling tube 130. As a result, it is possible to prevent clogging of the sintered material in the vicinity of the opening 131 of the sampling tube 130 during insertion, so that the recovery rate of the sintered material can be increased.

In general, when a core sample of soil is collected in the field of civil engineering and construction, the sample tube is inserted while rotating the sample tube for the purpose of reducing the penetration resistance of the sample tube. However, the raw material layer 10 of the sintered raw material that is a sampling target according to the present embodiment has different material characteristics compared to earth and sand. For example, the particle size and porosity of the sintered raw material forming the raw material layer 10 are larger than those of earth and sand. Accordingly, since the resistance when the sampling tube 130 is inserted into the raw material layer 10 is small, it is not necessary to insert the sampling tube 130 while rotating it. When the collection tube 130 is inserted into the raw material layer 10 while rotating, rather with the rotation operation of the extraction tube 130, causes clogged sintering raw material in the vicinity of the opening 131, the recovery ratio is an adverse effect of a decrease. In this embodiment, therefore, the columnar sample of the sintered raw material to be collected can be prevented from being clogged and consolidated by inserting the sampling tube 130 into the raw material layer 10 without rotating, so that the actual filling state of the raw material layer 10 can be prevented. (Raw material mixture distribution, density distribution, particle size distribution, porosity distribution, etc.) can be accurately grasped.

  Thereafter, as shown in FIG. 7C, the bottom cover 150 is rotated downward about the rotation shaft 161 by the rotation mechanism 160 with the sampling tube 130 being inserted into the raw material layer 10. (S3). As a result, the bottom lid 150 is inserted into the raw material layer 10 while rotating along an arcuate rotation trajectory together with the arm 163, and is disposed at a closed position that closes the opening 131 at the lower end of the sampling tube 130. As a result, the bottom lid 150 comes into close contact with the opening 131 of the sampling tube 130 and the opening 131 is closed.

  Further, as shown in FIG. 7D, the lifting tube 140 moves the sampling tube 130, the bottom lid 150, and the rotation mechanism 160 in the vertical direction while the bottom cover 150 keeps the opening 131 of the sampling tube 130 closed. The sampling tube 130 and the bottom lid 150 are pulled out from the raw material layer 10 (S4). As a result, the columnar sample 15 can be collected in the filled state in the raw material layer 10 without dropping or consolidating the columnar sample 15 in the collection tube 130 downward.

  Thereafter, the columnar sample 15 is taken out from the sampling tube 130 drawn from the raw material layer 10 (S5). Specifically, after removing the sampling tube 130 from the lower joint 147 of the main body 110 of the sampling device 100, the sampling tube 130 is placed horizontally. Next, as shown in FIG. 8, the partition plates 135 are respectively inserted into the plurality of slits 134 formed on the side surface 133 of the sampling tube 130, and the columnar sample 15 in the sampling tube 130 is placed in the axial direction of the sampling tube 130 ( That is, it is divided in the height direction of the raw material layer 10. Thereafter, the divided columnar sample 15 is taken out from the collection tube 130. For example, the divided piece of the columnar sample 15 dropped from the opening 131 at the lower end of the sampling tube 130 is collected by standing the sampling tube 130 in the vertical direction and removing the partition plate 135 in order from the lower end side of the sampling tube 130. Thereby, the columnar sample 15 can be cut out and collected for each height position of the raw material layer 10.

<2. Second Embodiment>
Next, a sampling device and a sampling method according to the second embodiment of the present invention will be described in detail. The sampling apparatus according to the second embodiment is different from the first embodiment only in the structure of the sampling tube, and other functional configurations are substantially the same as those in the first embodiment. is there. Therefore, hereinafter, the structure of the sampling tube, which is a feature of the second embodiment, and a sampling method using the same will be described, and other detailed description will be omitted.

[2.1. Configuration of sampling device]
First, the overall configuration of the sampling apparatus 100 according to the second embodiment will be described with reference to FIG. FIG. 9 is a perspective view showing the overall configuration of the sampling apparatus 100 according to the second embodiment.

  As shown in FIG. 9, the sampling apparatus 100 according to the second embodiment is similar to the first embodiment in that the main body 110 is erected in the vertical direction, and the main body 110 is placed in the sintering machine width direction. It is comprised from the mount frame 120 supported so that a movement is possible. The main body 110 includes a cylindrical collection tube 230 for collecting a columnar sample from the raw material layer 10, an elevating mechanism 140 for raising and lowering the collection tube 230, and a bottom for closing the opening 131 at the lower end of the collection tube 230. A lid 150 and a rotation mechanism 160 that rotates the bottom lid 150 along an arcuate rotation locus are provided.

  The sampling tube 230 of the sampling device 100 according to the second embodiment has a structure effective when it is desired to collect a sample at an arbitrary depth position of the raw material layer 10. The gantry 120, the lifting mechanism 140, the bottom lid 150, and the rotation mechanism 160 are the same as those in the first embodiment.

[2.2. Collection tube]
Next, the configuration of the collection tube 230 according to the present embodiment will be described with reference to FIGS. 10 is a perspective view showing a sampling tube 230 according to the present embodiment, FIG. 11 is a bottom view showing the sampling tube 230 according to the present embodiment, and FIG. 12 is a cross-sectional view taken along line AA in FIG. It is.

  As shown in FIGS. 10 to 12, the sampling tube 230 has a substantially cylindrical shape with an open upper end and a lower end, and the inside is hollow. A circular opening 231 is provided at the lower end of the collection tube 230, and when the collection tube 230 is inserted into the raw material layer 10, a sample of the sintering raw material enters the collection tube 230 from the opening 231.

  The sampling tube 230 has a cylindrical shape so that the resistance when inserted into the raw material layer 10 is minimized. The thickness of the sampling tube 230 is preferably as thin as possible (for example, 2 mm or less) while ensuring rigidity. Furthermore, in order to reduce insertion resistance, it is preferable that the lower end portion 232 (tip portion) of the sampling tube 230 is sharpened.

A part of the side surface 233 of the sampling tube 230 is formed with a substantially rectangular side surface opening 234 that is long in the axial direction. A substantially rectangular cover 235 that covers the side opening 234 is detachably attached to the side opening 234. As shown in FIG. 11, the cover 235 preferably has substantially the same curvature as the side surface 233 of the collection tube 230. For example, when the outer diameter φ of the sampling tube 230 is 150 mm, the curvature radius R ₅ of the cover 235 is preferably 75 mm. Thereby, even when the side opening 234 is covered with the cover 235, the entire collection tube 230 can be maintained in a cylindrical shape having substantially the same diameter.

  A pair of support members 236 and 236 that support the cover 235 so as to be slidable in the axial direction are attached to the left and right ends of the side opening 234. The support member 236 is made of, for example, an L-shaped member extending in the axial direction at the end of the side opening 234 of the sampling tube 230, and functions as a guide for guiding the slide of the cover 235. By sliding the cover 235 in the axial direction of the sampling tube 230 with the support members 236 and 236, the side opening 234 can be opened / closed by the cover 235.

  Further, a lock bolt 237 is attached by a fixture 238 above the side opening 234 in the side 233 of the sampling tube 230. In addition, near the upper end of the cover 235, a receiver 239 that is screwed with the lock bolt 237 is attached. The lock bolt 237 and the receiver 239 function as a fixing means for fixing the cover 235 to a position that covers the side opening 234 of the sampling tube 230. That is, as shown in FIG. 12, with the cover 235 closed so as to cover the entire side opening 234, the cover 235 is fixed to the sampling tube 230 by being screwed into the receiving tool 239. The Accordingly, the cover 235 can be fixed so as not to be removed when the sampling tube 230 is inserted into the raw material layer 10.

  In addition, a disc-shaped hold plate 240 is disposed inside the sampling tube 230, and the diameter of the hold plate 240 is approximately the same as the inner diameter of the sampling tube 230. The hold plate 240 has a function of holding the upper end of the columnar sample of the sintered raw material collected in the collection tube 230 so as not to collapse. The hold plate 240 is supported by a pair of support rods 241 and 241 inserted into the collection tube 230 from above the collection tube 230. Before the collection tube 230 is leveled, the support plate 241 and 241 are used to raise and lower the hold plate 240 in the collection tube 230 so that the upper end of the columnar sample of the sintered material in the collection tube 230 does not collapse. It is possible to arrange it at a position where it can be pressed. In that case, it is preferable to adjust the position of the hold plate 240 so as not to consolidate the columnar sample.

  An annular flange 242 is attached to the upper end of the sampling tube 230. The flange 242 functions as a connecting means for connecting the sampling tube 230 to the lifting mechanism 140. The flange 24 is coupled to the lower joint 147 of the lifting mechanism 140 by a fixing member such as a bolt.

  By the way, by providing the side surface opening 234 on the side surface 233 of the sampling tube 230 as described above, the columnar sample 15 of the sintered raw material collected in the sampling tube 230 can be taken out from the side surface opening 234. Therefore, the columnar sample 15 is easily taken out as the opening area of the side opening 234 is large. On the other hand, if the opening area of the side opening 234 is excessively large, when the collection tube 230 is placed horizontally to take out the columnar sample 15, the sintering raw material of the columnar sample 15 in the collection tube 230 becomes the side opening. Spills from 234. Therefore, from the viewpoint of preventing the sintering raw material from spilling down, the opening area of the side opening 234 is preferably small.

  Therefore, in the present embodiment, as shown in FIG. 11, the opening angle θ of the side opening 234 is set to an angle (for example, θ = 80 °) commensurate with the repose angle (for example, about 40 °) of the sintering raw material. Yes. Thereby, while ensuring the ease of taking out the columnar sample 15 from the side opening 234, it is possible to suitably prevent the sintering raw material from spilling out from the side opening 234 during the taking out.

Further, as shown in FIGS. 9 and 12, the bottom cover 150 is rotated by the rotation mechanism 160 along an arc-shaped rotation locus centering on the rotation shaft 161, so that the lower end of the sampling tube 230 is lowered. The opening 231 is closed by the bottom lid 150. Accordingly, as in the first embodiment, the bottom cover 150 is formed of a curved plate having a curvature radius R ₁ corresponding to the arcuate rotation trajectory of the bottom cover 150, and in particular, the curvature radius R of the bottom cover 150. ₁ and the radius of curvature R ₂ of the arcuate rotation trajectory of the bottom lid 150 are preferably the same. Thereby, the resistance when the bottom lid 150 is rotated and inserted into the raw material layer 10 can be minimized.

Further, as shown in FIGS. 9 and 12, the lower end portion 232 of the sampling tube 230 according to the second embodiment is also formed in an arc shape along the arcuate rotation trajectory of the bottom lid 150. preferable. In particular, the curvature radius R ₄ of the lower end 232 of the sampling tube 230 is preferably the same as the curvature radius R ₂ of the arcuate rotation trajectory of the bottom lid 150, and is also the curvature radius R ₁ of the bottom lid 150 itself. More preferably, they are the same (R ₄ = R ₁ = R ₂ ). Thereby, when the bottom lid 150 is rotated downward, the bottom lid 150 does not collide with the lower end portion 232 of the sampling tube 230, and the arc-shaped bottom lid 150 causes the arc-shaped bottom end of the sampling tube 230. The part 232 can be closed without a gap.

[2.3. Sampling method]
Next, referring to FIG. 7 and FIGS. 13 to 15, a columnar sample from the raw material layer 10 charged on the pallet 3 of the sintering machine 1 using the sampling apparatus 100 according to the second embodiment. A sampling method for collecting 15 will be described.

  FIG. 13 is a process diagram showing a procedure for covering the side opening 234 of the sampling tube 230 according to the present embodiment with the cover 235. As shown in FIG. 13, the side opening 234 of the collection tube 230 is closed with a cover 235 before the collection tube 230 is inserted into the raw material layer 10. Specifically, first, the upper end of the cover 235 is inserted into the gap between the support members 236 and 236 and the side surface 233 from the lower end side of the sampling tube 230 (FIG. 12B). Next, the cover 235 is slid upward along the support members 236 and 236 (FIG. 12C), and the side opening 234 is closed by the cover 235. Thereafter, the cover 235 is fixed to the sampling tube 230 by screwing the lock bolt 237 into the receiving tool 239 (FIG. 12D).

  With the side opening 234 closed by the cover 235 as described above, the sampling tube 230 is inserted into the raw material layer 10 to sample the columnar sample 15 of the sintered raw material. This sampling method is the same as that of the first embodiment shown in FIG. 7, but the outline will be described below.

  First, the main body 110 of the sampling device 100 is disposed above the raw material layer 10 inserted in the pallet 3, and the sampling tube 230 is disposed above the position in the width direction where sampling is desired. (See FIG. 7A.) Next, with the bottom lid 150 in the retracted position, the elevating mechanism 140 lowers the sampling tube 230 together with the bottom lid 150 and the rotation mechanism 160 in the vertical direction and inserts it into the raw material layer 10 to a desired depth. (See FIG. 7B.) At this time, the sampling tube 230 is inserted into the raw material layer 10 without rotating. Next, with the sampling tube 230 being inserted into the raw material layer 10, the bottom lid 150 is rotated downward by the rotation mechanism 160 and placed at the closed position, and the opening 231 at the lower end of the sampling tube 230 is closed. (See FIG. 7C.) Thereafter, with the bottom cover 150 closing the opening 231 of the collection tube 230, the collection tube 230, the bottom cover 150, and the rotation mechanism 160 are raised in the vertical direction by the elevating mechanism 140. The collection tube 230 and the bottom lid 150 are pulled out (see FIG. 7D).

  Next, the columnar sample 15 is taken out from the collection tube 230 drawn out from the raw material layer 10 as described above. 14A and 14B are process diagrams showing a procedure for taking out the columnar sample 15 from the side opening 234 of the collection tube 230 according to this embodiment.

  Specifically, first, the sampling tube 230 is removed together with the bottom lid 150 from the lifting mechanism 140 of the sampling device 100. Next, as shown in FIG. 14A (a), the holding plate 240 inside the collection tube 230 is lowered using the support rods 241 and 241, and is brought into contact with the upper surface of the columnar sample 15 in the collection tube 230. At this time, the lowering amount of the hold plate 240 is adjusted so that the columnar sample 15 is not consolidated by the hold plate 240. Thereafter, the collection tube 230 is placed horizontally.

  Next, as shown in FIG. 14A (b), after removing the lock bolt 237 from the receiving tool 239, the cover 235 is slid in the axial direction toward the lower end side of the sampling tube 230, thereby opening the side opening of the sampling tube 230. 234 is exposed. At this time, if the cover 235 is slid within the range in which the columnar sample 15 is desired to be collected to partially expose the side opening 234, it is possible to suitably prevent the sintering raw material from spilling out from the side opening 234. However, the cover 235 may be completely removed to expose the entire side opening 234.

  Thereafter, as shown in FIGS. 14B (c) and 14 (d), the partition plate 250 is inserted into the exposed side opening 234, and the central portion of the columnar sample 15 inside the sampling tube 230 is divided. At this time, the partition plate 250 may be inserted at an arbitrary depth position of the columnar sample 15 desired to be collected. Thereafter, as shown in FIG. 14B (e), the pair of auxiliary cutters 252 and 252 provided on the partition plate 250 are rotated to completely divide the columnar sample 15 at the position where the partition plate 250 is inserted. Next, the collection tube 230 is turned so that the side opening 234 of the collection tube 230 faces downward, and the columnar sample 15 between the partition plate 250 and the hold plate 240 is taken out from the side opening 234.

  Here, with reference to FIG. 15, the partition plate 250 which concerns on this embodiment is demonstrated. FIG. 15 is a bottom view showing the operation of the partition plate 250 inserted into the sampling tube 230 according to the present embodiment. 15A shows a state when the partition plate 250 is inserted into the side opening 234 (corresponding to FIG. 14B (d) above), and FIG. The state when the cutter 252 is rotated (corresponding to FIG. 14B (e) above) is shown.

  As shown in FIG. 15, the partition plate 250 includes a main plate 251 and a pair of movable auxiliary cutters 252 and 252 attached to the main plate 251. The main plate 251 is inserted into the side opening 234 of the sampling tube 230 and has a function of dividing the columnar sample 15. For this reason, the front end 251 a of the main plate 251 has an arc shape that matches the inner peripheral surface 230 a of the sampling tube 230. Further, the width w of the main plate 251 is approximately the same as the opening width of the side opening 234.

  The auxiliary cutters 252 and 252 are rotatably provided on both sides of the main plate 251 and have a function of dividing both end portions of the columnar sample 15 between the main plate 251 and the sampling tube 230. The handle portion 252a of the auxiliary cutter 252 is rotatably attached to the main plate 251 by hinge portions 253 and 253. The blade portion 252 b of the auxiliary cutter 252 has an arc shape that matches the inner peripheral surface 230 a of the sampling tube 230. Further, the blade portion 252b of the auxiliary cutter 252 is provided with a pin-shaped stopper 252c, and this stopper 252c is loosely inserted into an arc-shaped guide long hole 254 formed in the main plate 251. The guide long hole 254 has a function of guiding the auxiliary cutter 252 so that the auxiliary cutter 252 can be easily and reliably rotated and restricting the rotatable range.

  The operation of the partition plate 250 will be described. When the partition plate 250 is inserted into the side opening 234 of the collection tube 230, the central portion of the columnar sample 15 in the collection tube 230 is divided by the main plate 251 of the partition plate 250. When the partition plate 250 is inserted, as shown in FIG. 15A, the pair of auxiliary cutters 252 and 252 are closed (that is, the pair of blade portions 252b and 252b overlap the main plate 251). . Thereby, when inserting the partition plate 250 with respect to the side surface opening part 234, the auxiliary cutters 252 and 252 do not become obstructive.

  After the partition plate 250 is inserted into the sampling tube 230 as described above, the handle portions 252a and 252a of the auxiliary cutters 252 and 252 protruding outside the sampling tube 230 are rotated inward. As a result, the blade portions 252b and 252b rotate outward, protrude outward from the outer edge of the main plate 251, and are in close contact with the inner peripheral surface 230a of the sampling tube 230. By the operation of the auxiliary cutters 252 and 252, both end portions of the columnar sample 15 that cannot be divided by the main plate 251 in the collection tube 230 are divided. Accordingly, since the entire columnar sample 15 can be completely divided at the insertion position of the partition plate 250, the columnar sample 15 at a desired depth position between the partition plate 250 and the hold plate 240 can be easily taken out from the side opening 234. Will be able to.

[3. Summary]
The sampling apparatus 100 and the sampling method using the same according to the first and second embodiments of the present invention have been described above.

  According to the above embodiment, when the sampling tube 130 (230) is inserted into the raw material layer 10, the sampling tube 130 (230) is inserted into the raw material layer 10 without rotating. Thereby, it can prevent suitably that the sintering raw material with which the collection pipe | tube 130 (230) is filled during insertion is consolidated. Further, when the columnar sample 15 is collected from the raw material layer 10 charged in the pallet 3 of the sintering machine 1, the opening 131 (231) at the lower end of the sampling tube 130 (230) charged in the raw material layer 10. ) Is closed with the bottom lid 150, and the sampling tube 130 is pulled up together with the bottom lid 150. Thereby, when the collection tube 130 (230) is pulled up, the columnar sample 15 can be prevented from dropping from the collection tube 130 (230) due to its own weight. Therefore, the columnar sample 15 can be pulled up together with the sampling tube 130 (230) without consolidating the columnar sample 15 in the sampling tube 130 (230).

  Therefore, according to the said embodiment, the columnar sample 15 with the filling state in the raw material layer 10 can be extract | collected, without compacting. Therefore, from the columnar sample 15, it is possible to accurately measure the filling state of the sintering raw material in the raw material layer 10 (mixing distribution of raw materials, density distribution, particle size distribution, porosity distribution, etc.).

  In the first embodiment, the partition plate 135 is inserted into the plurality of slits 134 of the collection tube 130 to divide the columnar sample 15 in the collection tube 130 in the axial direction (depth direction of the raw material layer 10). It can be collected later. Therefore, it is possible to easily collect a sample at a desired depth position of the raw material layer 10 and easily and accurately measure the filling state of the sintered raw material at each depth position.

  In the second embodiment, a sample at an arbitrary depth position can be suitably cut out and collected from the columnar sample 15 in the collection tube 230 using the partition plate 250. Therefore, it is possible to easily collect a sample at a desired depth position of the raw material layer 10 and easily and accurately measure the filling state of the sintered raw material at the depth position.

  Conventionally, the filling state of the layered sintered raw material charged in the sintering machine 1 has not been fully elucidated, and the air permeability of the raw material layer 10 is evaluated by utilizing the pressure loss of the raw material layer 10 as a whole. And there was only the method of grasping | ascertaining the said filling state indirectly from this evaluation result. On the other hand, according to the present embodiment, the columnar sample 15 can be collected from the raw material layer 10 without being compacted, and the depth position of the collected columnar sample 15 is clear, so that actual sintering on the pallet 3 can be performed. The filling state of the raw material can be directly grasped. Therefore, it can greatly contribute to the improvement of the charging device 2 of the sintering raw material in the sintering machine 1, and the sintering reaction is improved by improving the blending ratio of the sintering raw material on the pallet 3 and the gas permeability. Can be promoted. Therefore, there is an effect that productivity of sintered ore by the sintering machine 1 can be further improved.

  Next, examples of the present invention will be described. The following examples are merely examples for explaining the effects of the present invention, and the present invention is not limited to the following examples.

<Test 1>
First, a test for examining the influence of the diameter of the sampling tube on the recovery rate of the sintered raw material will be described. In this test, three types of sampling tubes with different tube diameters (inner diameter 89, 150, 200 mm) were inserted into the raw material layer of sintered raw material (sintered raw material dropped from a predetermined height) without rotating. The weight of the sintered raw material collected in each sampling tube was measured. As a reference example, the recovered weight was measured when hand-packed in the sampling tube (when the sintered raw material was dropped into the sampling tube from approximately the same height).

  FIG. 16 shows the relationship between the sintering raw material recovery ratio measured in this test and the diameter of the sampling tube. The collection ratio in FIG. 16 is obtained by dividing the collection weight when the sampling tube is inserted into the raw material layer by the collection weight of the reference example (hand-packed).

  According to the result of FIG. 16, it can be seen that the larger the inner diameter of the sampling tube, the higher the collection ratio of the sintered raw material. In particular, when the inner diameter is 150 mm or more, the recovery ratio increases rapidly and is 90% or more. This is considered to be because the ratio of the range in which the insertion pressure of the sampling tube acts on the sintered raw material in the sampling tube decreases as the inner diameter of the sampling tube increases. In addition, friction is generated between the inner peripheral surface of the sampling tube and the sintered raw material when the sampling tube is inserted, but it is considered that this friction coefficient does not significantly affect the consolidation of the sintered raw material in the sampling tube.

<Test 2>
Next, a test performed to verify the effect of non-rotating the sampling tube when inserting the sintered raw material into the raw material layer will be described. In this test, a sampling tube (inner diameter: 89 mm, length: 600 mm) was inserted into the raw material layer, and the weight of the sintered raw material collected in the sampling tube was measured. At this time, in Examples 1 to 4, the sampling tube was inserted in the vertical direction without rotating, and in Comparative Examples 1 to 3, the sampling tube was provided with a rotation mechanism, and the sampling tube was inserted in the vertical direction while rotating. . Moreover, in the reference example, the operator manually packed the sintered raw material in the sampling tube. When hand-packing, it was packed while observing so that the sintered raw material would not clog in the sampling tube. The test conditions and results according to this example are shown in Table 1 below.

  As shown in Table 1, when the tube thickness of the collection tube is 3 mm, the weight of the sintered raw material collected in the collection tube (hereinafter referred to as the collection weight) is 3.56 in Examples 1-3. While it was ˜3.63 kg, in Comparative Example 1, it was 2.92 kg. Further, when the tube thickness of the sampling tube was 8 mm, the recovered weight was 2.92 kg in this Example 4, whereas it was 2.30 to 2.42 kg in Comparative Examples 2-3. The recovered weight of the reference example was 4.16 kg. According to this result, when inserted without rotating the sampling tube as in Examples 1-4, the sintered raw material is more than when inserted while rotating the sampling tube as in Comparative Examples 1-3. It can be seen that the recovery rate increases.

  Moreover, in FIG. 17, the recovery ratio of the sintering raw material of the reference example, a present Example, and a comparative example measured by this test is shown. The recovery ratio in FIG. 17 is obtained by converting the test result of the collection weight in Table 1 (collection tube inner diameter 89 mm) into the collection weight of a collection tube having an inner diameter of 150 mm and a tube thickness of 2 mm, and 100% of the reference example (hand-packed) The mutual ratio is calculated as follows.

  As shown in FIG. 17, the recovery rate of the comparative example (rotating the sampling tube) is 74%. On the other hand, the recovery rate of this example (the sampling tube is not rotated) is 92%, which is about 1.3 times that of the comparative example. Also from this result, when the sampling tube is inserted without rotating as in this example, the recovery rate of the sintering raw material is increased compared to when the sampling tube is inserted while rotating as in the comparative example. I understand.

  Consider the reason. When the sampling tube is inserted into the raw material layer while being rotated as in the comparative example, the time during which the insertion resistance is generated by the sampling tube is increased as compared to the non-rotating case as in this embodiment. Therefore, it is considered that the sintered raw material is likely to be clogged in the vicinity of the opening at the lower end of the sampling tube, and further, the sintered raw material is consolidated and the sintered raw material into the sampling tube is hindered. Therefore, it seems that the recovery rate of the sintered raw material increases when the sampling tube is inserted into the raw material layer without rotating as in the present embodiment.

  In addition, according to the test result of the said Table 1, when the pipe | tube thickness of a collection pipe | tube is increased, it turns out that the recovery rate of a sintering raw material falls. The reason for this is considered to be that when the thickness of the sampling tube is thick, the insertion resistance of the sampling tube to the raw material layer increases.

  The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field to which the present invention pertains can come up with various changes or modifications within the scope of the technical idea described in the claims. Of course, it is understood that these also belong to the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Sintering machine 2 Charging apparatus 3 Pallet 4 Conveyor 5 Ignition furnace 6 Wind box 7 Main duct 8 Cyclone dust collector 9 Air exhauster 10 Raw material layer 11 Chimney 12 Combustion zone 13 Crusher 14 Sintering raw material 15 Columnar sample 100 Sampling device 110 Main body Part 120 frame 121 horizontal member 122 leg part 130, 230 sampling pipe 131, 231 opening part 132, 232 lower end part 133, 233 side face 134 slit 135 partition plate 140 elevating mechanism 141 guide pillar 142 elevating cylinder 143 fixing part 144 upper slider 145 lower part Slider 146 Upper joint 147 Lower joint 150 Bottom cover 160 Rotating mechanism 161 Rotating shaft 162 Rotating cylinder 163 Arm 164 Link mechanism 234 Side opening 235 Cover 236 Support member 237 Kuboruto 240 hold the plate 250 partition plate 251 main plate 252 auxiliary cutter 253 hinge 254 guide slot

Claims (12)

In a sampling device for collecting a sintered raw material sample from a raw material layer of a sintered raw material charged in a sintering machine,
A sampling tube having an opening at the lower end;
An elevating mechanism that raises and lowers the sampling tube and inserts and removes the raw material layer;
A bottom lid for closing the opening at the lower end of the sampling tube;
A rotation mechanism for rotating the bottom lid along an arcuate rotation locus;
With
The rotation mechanism includes an arm that is rotatably connected to a rotation shaft and supports the bottom cover, and rotates the bottom cover together with the arm around the rotation shaft. It is arranged at a closed position for closing the opening of the sampling tube by rotating downward, and is arranged at a retracted position separated from the sampling tube by rotating the bottom lid upward. Sampling material sampling equipment.   2. The sintering material sampling apparatus according to claim 1, wherein a lower end of the sampling tube is formed in an arc shape along a rotation trajectory of the bottom cover.   The said raw cover consists of a curved board which has a curvature radius according to the rotation locus | trajectory of the said bottom cover, The sampling apparatus of the sintering raw material of Claim 1 or 2 characterized by the above-mentioned. The said raw material is a plate shape parallel to the rotation direction of the said bottom cover, The sampling apparatus of the sintering raw material as described in any one of Claims 1-3 characterized by the above-mentioned. The rotation mechanism is connected to the upper end of the sampling tube,
5. The sintering material sampling apparatus according to claim 1, wherein the sampling tube, the rotating mechanism, and the bottom cover are integrally moved up and down by the lifting mechanism.   The sampling of the sintering raw material according to any one of claims 1 to 5, wherein one or two or more slits for inserting a partition plate are formed on a side surface of the sampling tube. apparatus. The collection tube is
A side opening formed on the side of the sampling tube;
A cover removable from the side opening;
The sampling apparatus of the sintering raw material as described in any one of Claims 1-5 characterized by the above-mentioned.   8. The apparatus according to claim 1, further comprising a gantry for moving a main body of a sampling device including the sampling tube, the elevating mechanism, the bottom lid, and the rotating mechanism in a width direction of the sintering machine. The sampling apparatus of the sintering raw material as described in any one of these. In the sampling method for collecting a sample of the sintered raw material from the raw material layer of the sintered raw material charged in the sintering machine using the sintering raw material sampling device according to any one of claims 1 to 8,
Disposing the sampling tube of the sampling device above the raw material layer;
A step of lowering the sampling tube by the elevating mechanism and inserting it into the raw material layer in a state where the bottom lid is disposed at a retracted position separated from the sampling tube;
Placing the bottom lid in a closed position for closing the opening of the sampling tube by turning the bottom lid downward by the turning mechanism;
A step of raising the sampling tube by the lifting mechanism and pulling it out of the raw material layer while the opening is closed by the bottom lid;
A method for sampling a sintering raw material, comprising:   The method of sampling a sintering raw material according to claim 9, wherein in the step of inserting the sampling tube into the raw material layer, the sampling tube is inserted without rotating. After drawing the sampling tube from the raw material layer, inserting a partition plate into a plurality of slits formed on the side surface of the sampling tube;
Removing the partition plate in order from the lower end side of the sampling tube, and taking out a sample of the sintered raw material in the sampling tube;
The method of sampling a sintering raw material according to claim 9 or 10, further comprising: After extracting the sampling tube from the raw material layer, moving a cover that covers the side opening formed on the side surface of the sampling tube to expose at least a part of the side opening;
Inserting a partition plate into the exposed side opening, and taking out a sample of the sintering material between the partition plate and the bottom lid;
The method of sampling a sintering raw material according to claim 9 or 10, further comprising:

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