JP7352083B2 - Sintering raw material sampling device - Google Patents

Description

The present invention relates to a sampling device for collecting a sample of sintering raw material from a raw material layer of sintering raw material loaded into a firing pallet of a sintering machine.

The iron raw materials used in blast furnaces include mined iron ore lump ore, as well as sintered ore made from fired ore powder. Sintered ore can be obtained by firing iron ore powder together with limestone, coke powder, and the like.

To produce this sintered ore, generally, various brands of fine ore, auxiliary raw materials such as limestone, and carbonaceous materials such as coke powder, which serve as solid fuel, are mixed in a predetermined ratio, and then water is added. In addition, it is granulated into pseudo particles, and the granulated sintering raw material is charged into a firing pallet of a DL (Dwight Lloyd) type sintering machine that moves continuously in the horizontal direction. Next, the upper layer of the raw material layer made of the sintering raw material charged into the firing pallet is ignited with a burner or the like, and the sintering raw material is sintered while being sucked from below the firing pallet and forcedly ventilated.

The progress of such a sintering reaction depends on the mixing ratio of the sintering raw materials as well as the air permeability of the raw material layer in the firing pallet. Among these, the air permeability of the raw material layer is influenced by the filling state of the sintering raw material in the firing pallet, the porosity of the raw material layer, the particle size of the sintering raw material, and the like. Therefore, it is important to accurately grasp the filling state of the sintering raw material in the firing pallet, such as the particle size distribution of the sintering raw material in the depth direction of the raw material layer and the degree of filling.

For example, in order to investigate the state of the actual raw material layer on the firing pallets of a sintering machine, it may be possible to take one pallet offline and conduct a boring survey, but this would require a long period of equipment stoppage and a large amount of work. This will require additional costs.

Therefore, a collection tube having an opening at the lower end, an elevating mechanism for raising and lowering the collection tube to insert and remove it from the raw material layer, a bottom cover for closing the opening at the lower end of the collection tube, and a support for the bottom cover are provided. A sampling device is known that includes an arm and a rotation mechanism that rotates a bottom cover (see Patent Document 1). According to this sampling device, a sampling tube is inserted into a raw material layer of sintered raw materials charged into a sintering machine, and the bottom cover is rotated together with an arm to close the opening of the sampling tube. By pulling up (removing) the sampling tube in a closed state, the sintered raw material can be sampled while maintaining the actual filling state in the raw material layer.

Patent No. 5697528

The main parts of the sampling device according to Patent Document 1 mentioned above are as schematically shown in FIG. 7, but there is room for improvement in the following points in this conventional sampling device.

That is, as shown in FIG. 8, a collection tube 101 having an opening 101a at the lower end is inserted into the raw material layer 109, and a bottom lid 103 is provided at the tip to close the opening 101a of the collection tube 101. When the arm 106 is rotated, the sintered raw material 110 on the outside of the collection tube is pressed by the arm 106 (earth pressure is generated), and there is a risk that the collection tube 101 may be tilted or bent and deformed. . Further, a large burden is placed on the rotation shaft 105 that allows the arm 106 connected via the joint 118 to rotate freely relative to the collection tube 101. In particular, as the depth of the raw material layer 109 in the firing pallet becomes deeper, a greater force is applied when the arm 106 rotates, and this problem becomes even more serious. Therefore, it becomes necessary to increase the strength of the sampling tube 101 and the arm 106 by increasing their thickness, but this increases the size of the sampling device and increases the workload. Furthermore, in addition to these, in the conventional sampling device, the sintered raw material 110 between the collection tube 101 and the arm 106 gets in the way, and the opening 101a is not completely closed by the bottom cover 103, resulting in a gap. If the collection tube is pulled up while the opening 101a is not completely closed, the sintered raw material 110 will fall out from the gap between the bottom cover 103 and the opening 101a, making it impossible to collect the sample accurately. Note that Patent Document 1 states that by forming the arm 106 into a blade shape, the resistance when inserting into the raw material layer 109 can be minimized (see paragraph 0073). Even if the resistance can be minimized, it is unavoidable that the arm 106 will exert a pressing force on the collection tube 101. In particular, when the depth of the raw material layer 109 becomes deeper, the above-mentioned problems are unavoidable.

Therefore, the inventors of the present invention conducted intensive studies to solve the above-mentioned problem when closing the opening of the collection tube by rotating the arm that supports the bottom cover. By providing a load dispersion member, it is possible to distribute the load on the collection tube due to the sintered raw material pressed by the rotation of the arm, and the depth of the raw material layer on the firing pallet can be made deeper. The present invention was completed based on the discovery that it is effective even in cases where

Therefore, an object of the present invention is to provide a collection tube having an opening at the lower end, a lifting mechanism for raising and lowering the collection tube to insert and remove it from a raw material layer, and a bottom cover for closing the opening at the lower end of the collection tube. In a sampling device equipped with an arm that supports a bottom cover and a rotation mechanism that rotates the bottom cover, a sample of sintered raw material is sampled from a raw material layer of sintered raw material charged to a firing pallet of a sintering machine. When collecting, the load on the collection tube due to the sintered raw material pressed by the rotation of the arm can be dispersed, and the opening at the bottom end of the collection tube can be reliably closed with the bottom cover supported by the arm. The object of the present invention is to provide a sampling device that can perform the following steps.

That is, the gist of the present invention is as follows.
(1) A sampling device for collecting a sample of sintering raw material from a raw material layer of sintering raw material charged into a firing pallet of a sintering machine,
a collection tube having an opening at the lower end;
an elevating mechanism for elevating and lowering the collection tube to insert and remove it from the raw material layer;
a bottom cover for closing the opening at the lower end of the collection tube;
a rotation mechanism for rotating the bottom cover in an arcuate rotation trajectory, the rotation mechanism having an arm rotatably connected to a rotation shaft to support the bottom cover; It is possible to rotate the arm around the rotation axis with respect to the collection tube inserted into the raw material layer, and close the opening of the collection tube with the bottom cover supported at the tip thereof. and
Furthermore, when the bottom cover closes the opening of the collection tube, the sintered raw material located between the arm and the collection tube and pressed by the rotation of the arm enters the collection tube. A sampling device for sintering raw materials, characterized in that it is equipped with a load dispersion member for distributing the load of the sintered raw material.
(2) The load dispersion member has an inclined surface inclined from a virtual plane P that is perpendicular to the rotational surface formed by the rotational locus of the arm and parallel to the axis of the collection tube, and The sintered raw material sampling device according to (1), wherein the sintered raw material pressed by rotation of the arm is allowed to escape along the inclined surface.
(3) The sintering raw material sampling device according to (2), wherein the load dispersion member is mountain-shaped with the inclined surface on both sides sandwiching the rotating surface.

According to the sampling device of the present invention, there is provided a sampling tube having an opening at the lower end, a lifting mechanism for raising and lowering the sampling tube to insert and remove it from the raw material layer, and a bottom cover for closing the opening at the lower end of the sampling tube. and a rotation mechanism that rotates the bottom cover with an arm that supports the bottom cover. When collecting a sample, the load on the sampling tube due to the sintered raw material pressed by the rotation of the arm can be dispersed, and the opening at the bottom end of the sampling tube can be reliably closed with the bottom cover supported by the arm. You will be able to do this.

FIG. 1A is a schematic side view illustrating the sampling device according to the present invention, especially the lower side centered on the collection tube. FIG. 1B is a schematic side view for explaining the sampling device according to the present invention, especially the upper side centered on the tip of the elevating mechanism and the rotating mechanism. FIG. 2 is a schematic plan view for explaining the shape and positional relationship with the collection tube of an example of the load distribution member. FIG. 3 is a schematic plan view for explaining the shape and positional relationship with the collection tube of another example of the load distribution member. FIG. 4 is a schematic perspective view for explaining the state of the collection tube. FIG. 5 is a schematic diagram for explaining the positional relationship between the sampling tube and the mountain-shaped load distribution member in the sampling device used in Example 1. FIG. 6 is a schematic diagram for explaining the positional relationship between the sampling tube and the flat load distribution member in the sampling device used in Example 2. FIG. 7 is a schematic diagram for explaining a conventional sampling device that closes an opening at the lower end of a collection tube by rotating an arm provided with a bottom cover. FIG. 8 is a schematic diagram for explaining a malfunction in sampling in a conventional sampling device.

The present invention will be explained in detail below.
An example of the sampling device according to the present invention is schematically shown in FIG. 1 (FIGS. 1A and 1B). That is, the sampling device according to the present invention includes a sampling tube 1 having an opening 1a at the lower end, and lifting and lowering the sampling tube 1 to insert and remove the material layer 50 loaded into the firing pallet 40 of the sintering machine. A bottom lid 3 for closing the opening 1a at the lower end of the collection tube 1, and a rotation mechanism 4 for rotating the bottom lid 3 in an arcuate rotation trajectory. Of these, the rotation mechanism 4 has an arm 6 that is rotatably connected to an arm rotation shaft 5 and supports the bottom cover 3, and the rotation mechanism 4 has an arm 6 that is rotatably connected to an arm rotation shaft 5 and supports the bottom cover 3. The arm 6 is rotated about the rotation shaft 5, and the opening 1a of the collection tube 1 is closed by the bottom cover 3 supported at the tip thereof. In addition, the sampling device of the present invention further includes a load distribution member 7 located between the arm 6 and the sampling tube 1 when the bottom cover 3 closes the opening 1a of the sampling tube 1. Accordingly, the load on the collection tube 1 due to the sintered raw material pressed by the rotation of the arm 6 can be dispersed. 1A and 1B will be described in detail below, but FIG. 1A shows the lower side of the sampling device with the collection tube 1 in the center, and FIG. 1B shows the upper side of the sampling device. It is.

This load dispersion member may be any member that can prevent the collection tube from receiving a direct load from the sintered raw material pressed by the rotation of the arm. For example, a flat plate-shaped member may be used to It may also be placed between the tube and the tube. In that case, the flat load distribution member 17 is preferably perpendicular to the rotation plane R formed by the rotation locus of the arm 6 and parallel to the axis of the collection tube, as shown in FIG. The slope 17a is inclined from the virtual plane P so that at least a part of the sintered raw material pressed by the rotation of the arm 6 does not hit the collection tube 1 directly. It is better to let it escape. At this time, the projected width W of the flat load dispersion member 17 relative to the collection tube 1 is preferably in the range of not less than the width of the arm 6 and not more than the outer diameter of the collection tube 1, and more preferably The range is 1/2 or more of the outer diameter of the tube 1 and less than or equal to the outer diameter of the collection tube. In addition, at this time, the angle θ formed by the imaginary plane P that is perpendicular to the rotating surface R and parallel to the axis of the sampling tube and the inclined surface 17a of the flat load distribution member 17 is more than 0° and less than 90°. However, as shown in the examples described later, it is preferably 30° or more and 50° or less. If the angle θ becomes larger, it will be advantageous for the sintered raw material pressed by the arm 6 to escape, but since the distance between the arm 6 and the collection tube 1 will increase accordingly, the bottom supported by the arm 6 will be It is necessary to make the lid 3 longer, and the strength of the bottom lid itself must be ensured. Considering these, the suitable range of the angle θ is 30° or more and 50° or less (the angle φ in Table 2 of Example 2, which will be described later, is the complementary angle (90° - θ) of this angle θ, The preferred range of the angle φ is 40° or more and 60° or less.).

Further, the load dispersion member in the present invention is preferably a mountain-shaped load dispersion member formed by combining two plate-shaped load dispersion members having sloped surfaces described above into a mountain shape. That is, as shown in FIG. 3, this rotation forms an inclined surface that is perpendicular to the rotational surface R formed by the rotational locus of the arm 6 and inclined from a virtual plane P that is parallel to the axis of the collection tube. They are provided on both sides of the rotating surface R (both sides of the rotating surface R). At this time, the projected width W of the mountain-shaped load distribution member 27 relative to the collection tube 1 is preferably equal to or greater than the width of the arm 6 and less than or equal to the outer diameter of the collection tube 1, as in the case of the flat load distribution member 17. It is preferably in a range of 1/2 or more of the outer diameter of the collection tube 1 and less than or equal to the outer diameter of the collection tube. In addition, in this case, the angle θ between the inclined surfaces 27a and 27b of the mountain-shaped load dispersion member 27 with the respective virtual orthogonal planes P may be more than 0° and less than 90°. As shown, the angle is preferably 30° or more and 70° or less. If the angle θ becomes larger, it will be advantageous to release the sintered raw material pressed by the arm 6, but the distance between the arm 6 and the collection tube 1 (L in FIG. 5, which will be described later) will increase accordingly. Therefore, it is necessary to lengthen the bottom cover 3 supported by the arm 6, and the strength of the bottom cover itself must be ensured. Considering these, the suitable range of the angle θ is 30° or more and 70° or less (the angle φ in Table 1 of Example 1, which will be described later, is the complementary angle (90° - θ) of this angle θ, The preferred range of the angle φ is 20° or more and 60° or less.). Note that the angle θ formed by the inclined surface 27a and the angle θ formed by the inclined surface 27b may be the same or different values.

Further, the top of the mountain-shaped load dispersion member 27 may be formed by connecting plate-shaped load dispersion members to each other to form a corner, as shown in FIG. 3, or the corner may be chamfered. It may also be a rounded curved portion having a predetermined radius of curvature. Note that both Figures 2 and 3 schematically show the top view of the sampling device, and the thick solid arrow in the figure indicates the opening at the lower end of the sampling tube 1 with the bottom cover (both not shown). represents the direction of rotation of the arm 6 when closing. In addition, the thin solid line arrow indicates the movement of the sintered raw material that is pressed by the rotation of the arm at that time, and it moves along the slope 17a and slopes 27a and 27b and escapes (deviates) from the collection tube 1. It represents the situation.

Furthermore, regarding the size of the load distribution member in the present invention, its width in the lateral direction (length along the imaginary orthogonal plane P) is determined by the direct impact on the collection tube by the sintered raw material pressed by the rotation of the arm. From the viewpoint of preventing loads, it is sufficient to have a width that corresponds to at least the thickness of the arm (same as above), and preferably, a size that corresponds to the width of the collection tube (same as above). Further, the height of the load distribution member (length in the depth direction in the raw material layer) is not particularly limited, but it is desirable to match the height of the collection tube (same as above) as much as possible to protect the collection tube. However, it is necessary to avoid interference with the movement of the bottom cover provided at the tip of the arm. Note that the lower end of the load distribution member may be sharpened to reduce resistance to insertion into the raw material layer.

In the sampling device of the present invention, the sampling tube preferably has a substantially cylindrical shape with an open bottom end and an open top end, and is hollow inside. Preferably, as shown in FIG. 4, a circular opening 1a is provided at the lower end of the collection tube 1, and when the collection tube 1 is inserted into the raw material layer, the sintered raw material is drawn through the opening 1a. A sample enters the collection tube 1. In order to reduce the insertion resistance at that time, the lower end of the collection tube may be sharpened. On the other hand, it is preferable to provide a flange portion 1c around the opening 1b at the upper end of the collection tube to facilitate attachment and detachment with an elevating mechanism, etc. as described later. Further, regarding this collection tube 1, as described in Patent Document 1 (Patent No. 5697528), a plurality of slits for inserting partition plates may be provided on the side surface of the collection tube 1. Thereby, the columnar sample of the sintered raw material collected in the collection tube 1 can be divided perpendicularly to the depth direction, which is convenient for analyzing the sample in the depth direction of the raw material layer.

Further, the bottom cover in the sampling device of the present invention is composed of a plate-like member having a larger area than the opening formed at the lower end of the sampling tube, and has a function of closing the opening. The shape of the bottom cover 3 illustrated in FIG. 1A is, for example, a substantially rectangular curved plate shape, but the bottom cover is not limited to this, and any shape that can close the opening may be a substantially disk shape or an elliptical shape. It may have any shape, such as a shape. This bottom cover is rotatably supported around a rotation axis via an arm of a rotation mechanism described later, and by closing the opening of the collection tube with the bottom cover, the collection tube can be moved into the raw material layer. When the sample is pulled out from the sample, the columnar sample of the sintered raw material inside the sample can be prevented from falling out from the opening. That is, when a columnar sample is collected by inserting a sampling tube into the raw material layer, the columnar sample can be collected without being compacted while maintaining the porosity distribution, density distribution, etc. in the actual raw material layer.

On the other hand, the sampling device of the present invention has a lifting mechanism that can move the sampling tube up and down in the vertical direction and allows it to be inserted into and removed from the raw material layer of the sintered raw material charged in the firing pallet of the sintering machine. We are prepared. For example, as shown in FIG. 1 (FIGS. 1A and 1B), this elevating mechanism 2 includes a guide column 12 extending in the vertical direction, an elevating cylinder 13 attached to this guide column 12, and a movement of the elevating cylinder 13. It also includes an upper slider 14 and a lower slider 15 that allow the collection tube 1 to move up and down in the vertical direction, and an upper joint 16 and a lower joint 18. Of these, the guide column 12 is erected on a horizontal member 19 of a frame installed so as to straddle the firing pallet of the sintering machine in the width direction, as will be described later. functions as a guide rail. Further, the lifting cylinder 13 is a drive source for raising and lowering the collection tube 1, and the upper end of the lifting cylinder 13 is fixed to the upper end side of the guide column 12 by a fixing part 20. The lower end of the lifting cylinder 13 is connected to the upper end of the collection tube 1 via a lower slider 15 and a lower joint 18, and as the lifting cylinder 13 expands and contracts, these sliders 14 and 15 move along the guide column 12. Go up and down.

Further, the upper joint 16 is a member for attaching the rotation mechanism 4 described later to the elevating mechanism 2, and is connected to the upper slider 14 and the upper end of the rotation cylinder 8 in the rotation mechanism 4. As described above, one lower joint 18 is a member for attaching the collection tube 1 to the lifting mechanism 2, and is connected to the lower slider 15, the rotation shaft 5 of the rotation mechanism 4, and the upper end of the collection tube 1. ing. Here, the load distribution member 7 may be inserted into and removed from the raw material layer 50 separately from the collection tube 1 using a mechanism different from the elevating mechanism 2 as described above, but preferably For example, as shown in FIG. 1A, the load dispersion member 7 can be connected to the lower joint 18 through the attachment member 21, connected to the collection tube 1 through the attachment member 21, or connected to the collection tube 1 by welding or the like. It is preferable that the load distribution member 7 is inserted into and removed from the raw material layer 50 in conjunction with the lifting and lowering of the collection tube 1 by the lifting mechanism 2 described above. At that time, a predetermined gap is provided between the load distribution member 7 and the outer peripheral side of the sampling tube 1, so that the load on the load distribution member 7 due to the sintered raw material is directly propagated to the outer peripheral surface of the sampling tube 1. It is desirable not to do so.

Further, the sampling device of the present invention includes a rotation mechanism that rotates the bottom cover along an arc-shaped rotation locus. This rotating mechanism has an arm that is rotatably connected to a rotating shaft and supports the bottom cover, and the arm rotates around the rotating shaft with respect to the collection tube inserted into the raw material layer. By moving it, the bottom cover supported at the tip of the arm can close the opening of the collection tube. That is, by rotating the bottom cover downward about the rotation axis, the bottom cover is placed in the closing position where it closes the opening of the collection tube, and on the other hand, by rotating the bottom cover upward about the rotation axis. By moving the bottom cover, the bottom cover is placed in a retracted position away from the collection tube. In this manner, the rotation mechanism 4 allows the bottom cover to be used to open and close the opening of the collection tube.

The structure of this rotating mechanism includes, for example, as shown in FIGS. 1A and 1B, an arm 6 that is rotatably connected to a rotating shaft 5 and supports the bottom cover 3. More specifically, the rotation mechanism 4 in the present invention includes a rotation shaft 5, an arm 6, a rotation cylinder 8, and a link mechanism 9. Of these, the link mechanism 9 includes three link members 10a, 10b, and 10c that are rotatably connected to each other and four rotation shafts 11a, 11b, 11c, and 11d. Here, the aforementioned rotation axis 5 is a central axis when the bottom cover 3 is rotated along an arcuate trajectory. This rotation shaft 5 rotatably connects the link member 10a to the lower joint 18 of the lifting mechanism 2 described above. Further, the rotation shaft 5 is arranged above the upper end of the collection tube 1. Thereby, when the bottom cover 3 is rotated upward and retracted, the bottom cover 3 can be positioned sufficiently above the upper surface of the raw material layer 50, and the contact between the bottom cover 3 and the raw material layer 50 is prevented. can be avoided.

Moreover, the rotation cylinder 8 is a drive source for rotating the bottom cover 3. The upper end of the rotation cylinder 8 is rotatably connected to the upper joint 16 of the lifting mechanism 2 through a rotation shaft 11d. Further, the lower end of the rotation cylinder 8 is rotatably connected to the link members 10b and 10c of the link mechanism 9 by a rotation shaft 11b.

On the other hand, the arm 6 has a function of rotatably supporting the bottom cover 3. The arm 6 is composed of a plate-shaped member parallel to the rotation direction of the bottom cover 3, and is rotatably connected to the rotation shaft 5. The end of a link member 10b is rotatably connected to the upper end rear part of this arm 6 by a rotation shaft 11a, and the upper end front part of the arm 6 is rotatably connected to the rotation shaft 5 via the link member 10a. is connected to. As described above, the arm 6 rotates together with the bottom cover 3 about the rotation axis 5.

The link mechanism 9 has a function of converting the linear movement of the rotating cylinder 8 into a rotating movement of the bottom cover 3 along an arcuate trajectory. Both ends of the link member 10c in the link mechanism 9 are rotatably connected to the rotation cylinder 8 and the lower joint 18 via rotation shafts 11b and 11c, respectively. Further, both ends of the link member 10b are rotatably connected to the rotation cylinder 8 and the arm 6 by rotation shafts 11a and 11b, respectively. Further, one end of the link member 10a is rotatably connected to the lower joint 18 by the rotation shaft 5, and the other end of the link member 10a is fixed to the arm 6.

The link members 10a, 10b, 10c and the arm 6 in the link mechanism 9, the rotation shafts 11a, 11b, and 11c, and the rotation shaft 5 constitute a square link. Thereby, when the rotation cylinder 8 is extended, the bottom cover 3 is rotated downward along with the arm 6 along an arcuate trajectory about the rotation shaft 5 due to the square link, and is positioned at the closed position. On the other hand, when the rotation cylinder 8 is contracted, the square link causes the bottom cover 3 to rotate upward along with the arm 6 in an arcuate trajectory about the rotation shaft 5, and is positioned at the retracted position.

The rotating mechanism 4 configured as described above rotates the bottom cover 3 along an arcuate trajectory and inserts it into the raw material layer 50. In order to reduce the resistance at this time, the thickness of the bottom cover 3 is preferably thin, and the tip of the bottom cover 3 in the insertion direction is preferably sharpened. In addition, in order to further reduce the resistance, it is preferable that the bottom cover 3 is constituted by a curved plate having a predetermined radius of curvature R1 corresponding to the circular arc-shaped rotation locus of the bottom cover 3. In particular, it is more preferable that the radius of curvature R1 of the bottom cover 3 is the same as the radius of curvature R2 of the circular arc-shaped rotation locus of the bottom cover 3. Furthermore, it is more preferable that the radius of curvature R3 of the lower end forming the opening 1a of the collection tube 1 is also the same as these radii of curvature R1 and R2.

The sampling device according to the present invention can be installed on a pedestal installed so as to straddle the firing pallet of the sintering machine in the width direction, similar to the one described in Patent Document 1. The frame may be fixedly installed at a predetermined location on the baking pallet, or may be installed so as to be movable in the longitudinal direction of the baking pallet. Alternatively, it may be transported by a transport means such as a crane and placed at an appropriate position. In addition, regarding the installation location of the sampling device, it is sufficient to install it on the downstream side in the traveling direction of the charging device that charges the granulated sintered raw material into the firing pallet. There are no particular restrictions on the positional relationship with the ignition device (ignition furnace) that ignites the upper layer of the layer. However, when installing on the downstream side of the ignition furnace, the ignition furnace must be temporarily stopped to prevent the ignition furnace from igniting the upper layer of the raw material layer around the sample collection position in the firing pallet. It is desirable to take measures such as suppressing the amount of combustion and covering the surface of the raw material layer with a nonflammable or flame-retardant sheet. Similarly, when installed downstream of the ignition furnace, the sampling device is preferably installed as close to the ignition furnace as possible. As mentioned above, it is better to take some measures to prevent ignition in the vicinity of the sample collection position, but the area further outside is likely to be ignited. Therefore, if the distance from the ignition furnace to the sampling device is long, the firing region will propagate horizontally from the ignited region. In order to prevent this, it is necessary to widen the area where ignition does not occur, but doing so will lead to deterioration in the productivity of the sintering machine. In this way, it is desirable to collect a sample (columnar sample) from the raw material layer of the sintered raw material before ignition.

Further, the above-mentioned mount may function as a guide rail so that the sampling device can be moved in the width direction of the baking pallet. At this time, the sampling device may be manually moved in the width direction of the baking pallet by a worker, or may be moved using power from a drive source such as an electric motor. This makes it possible to collect a sample from the raw material layer at any position in the width direction of the firing pallet.

Next, the present invention will be explained based on examples, but the present invention is not limited to the following contents.

(Example 1)
A sampling test was conducted in which a sample of the sintering raw material was collected from the raw material layer of the sintering raw material using a sampling device as shown in FIGS. 1A and 1B. The stacking height of the raw material layer of sintering materials charged into the firing pallet of the sintering machine is 700 mm, and the collection tube is inserted almost to the bottom of the firing pallet, and the lower end opening of the collection tube is closed with the bottom cover. Sampling was performed by rotating the arm until the

Here, the sampling tube is made of ordinary steel with a thickness of 3 mm, has an opening with an inner diameter D = 150 mm, with both the upper and lower ends open, and has a cylindrical shape with a height of 900 mm. This is tube 1.
Further, the load dispersion member is a mountain-shaped load dispersion member 27 as shown in FIG. This mountain-shaped load distribution member 27 is made of ordinary steel with a plate thickness of 4.5 mm and a height of 900 mm. As shown in FIG. 5, this chevron-shaped load distribution member 27 has a rotational trajectory of the arm when closing the lower end opening of the collection tube 1 with a bottom cover (both not shown) supported by the arm. The opening angle (=2φ) with respect to the collection tube side is set in the range of φ=10 to 90° so that the angles formed by the rotating surface R formed by the rotation surface R and each of the inclined surfaces 27a and 27b have the same angle φ. I made some changes.

In adjusting this opening angle 2φ, as shown in the examples of FIGS. ) was always the same as the outer diameter of the collection tube 1 (inner diameter D + plate thickness 3 mm x 2 = 156 mm), the slope length h ₁ of each slope surface 27a, 27b was adjusted. In addition, the distance L between the chevron-shaped load distribution member 27 and the collection tube 1 is also adjusted, so that when the lower end opening of the collection tube is closed with the bottom cover, the distance L between the chevron-shaped load distribution member 27 and the collection tube 1 is adjusted. A gap of about several mm was formed between them. At this time, since the distance from the arm to the lower end opening changes depending on this distance L, the length of the bottom cover is also changed so that the lower end opening can be closed with the bottom cover. In addition, in the sampling device used in this sampling test, members other than the collection tube 1 and the chevron-shaped load dispersion member 27 were also used having strength equivalent to or greater than these members.

In the sampling test according to Example 1, the opening 1a of the sampling tube 1 was closed with the bottom cover 3 supported by the arm 6 under each condition of Test Nos. 1 to 7 listed in Table 1 below. did. After the sampling test is completed, the sampling tube 1 whose lower end opening is closed with the bottom cover 3 and the chevron-shaped load distribution member 27 are pulled up from the raw material layer for each test number, and changes in appearance such as bending and damage are checked. Visually observed. The results are shown in Table 1. When the angle φ was 15° or less, bending of the bottom cover was confirmed, and when the angle φ was 70° or more, bending of the mountain-shaped load distribution member 27 was confirmed. On the other hand, no deformation such as bending or breakage of the collection tube was observed in any of the test numbers.

(Example 2)
A sampling test was conducted in the same manner as in Example 1 except that the load dispersion member was a flat load dispersion member 17 as shown in FIG. As shown in FIG. 6, this flat plate-like load dispersion member 17 has a rotating trajectory of the arm when closing the lower end opening of the collection tube 1 with a bottom cover supported by the arm (none of which is shown). Several angles φ between the rotating surface R formed by the tilt surface 17a and the inclined surface 17a were varied in the range of φ=10 to 90 degrees. At this time, when adjusting the angle φ, the width W of the flat load dispersion member 17 (the projection of the flat load dispersion member 17 on the sampling tube 1) is The slope length _h1 of the slope surface 17a was adjusted so that the width) was always the same as the outside diameter of the collection tube 1 (inner diameter D + plate thickness 3 mm x 2 = 156 mm). In addition, the distance L between the flat load distribution member 17 and the collection tube 1 is also adjusted, so that when the lower end opening of the collection tube is closed with the bottom cover, the distance L between the flat load distribution member 17 and the collection tube 1 is adjusted. A gap of several mm was formed at the closest distance between the two. At this time, since the distance from the arm to the lower end opening changes depending on this distance L, the length of the bottom cover is also changed so that the lower end opening can be closed with the bottom cover.

In the sampling test according to Example 2, the opening 1a of the sampling tube 1 was closed with the bottom cover 3 supported by the arm 6 under each of the conditions of test Nos. 8 to 14 listed in Table 2 below. did. After the sampling test is completed, the sampling tube 1 whose lower end opening is closed with the bottom cover 3 and the flat load dispersion member 17 are pulled up from the raw material layer for each test number, and changes in appearance such as bending or damage are checked. Visually observed. The results are shown in Table 2. When the angle φ was 30° or less, bending of the bottom cover was confirmed, and when the angle φ was 70° or more, bending of the flat load dispersion member 17 was confirmed. On the other hand, no deformation such as bending or breakage of the collection tube was observed in any of the test numbers.

As described above, according to the present invention, when a sample of the sintering raw material is collected from the raw material layer of the sintering raw material charged in the firing pallet of the sintering machine, the sintering raw material is pressed by the rotation of the arm. It is possible to disperse the load on the collection tube due to the load on the collection tube, and the opening at the lower end of the collection tube can be reliably closed with the bottom cover supported by the arm. Sampling becomes possible even when the thickness (layer thickness) increases.

1: Collection tube, 2: Lifting mechanism, 3: Bottom cover, 4: Rotating mechanism, 5: Rotating shaft, 6: Arm, 7: Load distribution member, 8: Rotating cylinder, 9: Link mechanism, 10a, 10b, 10c: Link member, 11a, 11b, 11c, 11d: Rotation axis, 12: Guide column, 13: Elevating cylinder, 14: Upper slider, 15: Lower slider, 16: Upper joint, 17: Flat plate load distribution Member, 18: lower joint, 19: horizontal member, 20: fixed part, 40: firing pallet, 50: raw material layer.

Claims (3)

A sampling device for collecting a sample of sintering raw material from a raw material layer of sintering raw material charged into a firing pallet of a sintering machine,
a collection tube having an opening at the lower end;
an elevating mechanism for elevating and lowering the collection tube to insert and remove it from the raw material layer;
a bottom cover for closing the opening at the lower end of the collection tube;
a rotation mechanism for rotating the bottom cover in an arcuate rotation trajectory, the rotation mechanism having an arm rotatably connected to a rotation shaft to support the bottom cover; It is possible to rotate the arm around the rotation axis with respect to the collection tube inserted into the raw material layer, and close the opening of the collection tube with the bottom cover supported at the tip thereof. and
Furthermore, when the bottom cover closes the opening of the collection tube, the sintered raw material located between the arm and the collection tube and pressed by the rotation of the arm enters the collection tube. A sampling device for sintering raw materials, characterized in that it is equipped with a load dispersion member for distributing the load of the sintered raw material. The load dispersion member has an inclined surface inclined from a virtual plane P that is perpendicular to the rotational surface formed by the rotational locus of the arm and parallel to the axis of the collection tube, and 2. The sintered raw material sampling device according to claim 1, wherein the sintered raw material pressed by the motion is allowed to escape along the inclined surface. 3. The sintered raw material sampling device according to claim 2, wherein the load dispersion member has a mountain shape with the inclined surface on both sides with the rotating surface interposed therebetween.

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