Dust Solidification Device

Abstract

To provide a dust solidification device in which a slide resistance of a rod is suppressed.SOLUTION: A dust solidification device comprises: a storage tank 11 for storing dusts; a molding member 121 which is located at a lower part of the storage tank 11, and is provided with a molding hole 122 so that dusts in the storage tank flow therein; and a first rod 123 and a second rod 124 which are driven to perform reciprocating motion for advancing into and retreating from the molding hole, advance into the molding hole to compress the dusts in the molding hole, and face each other. The first rod includes a rod tip part and a rod base part. An axially vertical cross section of the rod tip part of the first rod is so made as to be larger than an axially vertical cross section of the rod base part of the first rod and smaller than an axially vertical cross section of the molding hole.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a dust solidification device. [Background technology]

[0002] Fumes generated during laser processing, plasma processing, and welding of metal materials can pose serious health risks if inhaled by workers. Therefore, to keep the work environment clean, dust collectors are used to remove dust from the work environment. Furthermore, the dust collected in the dust collector has a low bulk density, making it difficult to handle. Therefore, the dust is compressed, solidified, and processed into an easier-to-handle form (e.g., pellets). Dust that has been processed into an easier-to-handle form can be reused by remelting or other processes.

[0003] Patent Document 1 discloses a dust solidification device with a simple structure that prevents dust from scattering and solidifies the dust. This dust solidification device includes an apparatus main body, a hopper provided in the apparatus main body for storing dust, a molding member having a molding hole provided in the hopper, and a pressure rod that can freely advance into and retreat from the molding hole. In this dust solidification device, the pressure rod advances into the molding hole to solidify the dust filled therein and form a solidified product. The opening of the molding hole is open to the inside of the hopper. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-084052 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the device described in Patent Document 1, dust adheres to the inner wall of the molding hole during the dust solidification operation, and when the dust solidification operation is repeated, the dust adhered to the inner wall of the molding hole accumulates and solidifies. This increases the sliding resistance (frictional resistance) between the rod and the inner wall of the molding hole, and the force required to drive the rod increases. As a result, the dust solidification device is prone to operational abnormalities, leaving room for improvement. The present disclosure has been made in light of the above, and aims to provide a dust solidification device in which the sliding resistance of the rod is suppressed. [Means for solving the problem]

[0006] One aspect of the present disclosure that solves the above-mentioned problems and achieves the object is a dust solidification device. This dust solidification device includes a storage tank for storing dust, a molding member disposed below the storage tank and having a molding hole through which the dust in the storage tank flows, and opposing first and second rods that are driven to reciprocate, advancing and retreating into the molding hole, and that advance into the molding hole to compress the dust in the molding hole. The first rod includes a rod tip and a rod base. The thickness of the tip of the first rod is not less than 0.1 mm and not more than 10.0 mm. The axial vertical cross section of the rod tip portion of the first rod is diameter of than 0.2 mm or more Large, vertical cross section of the axial direction of the forming hole diameter of Each rod is positioned on the axis of the forming hole, and the axial direction perpendicular cross section refers to a cross section that crosses the long axis direction of the forming hole. The axial direction is the long axis direction of each rod, which roughly coincides with the long axis direction of the forming hole. A groove is provided on the outer periphery of the tip of the first rod.

[0007] In the dust solidification device having the above configuration, by expanding the rod tip of the first rod relative to the rod base, the rod tip of the first rod can grind away dust adhering to the inner wall of the molding hole, and the sliding area between the first rod and the inner wall of the molding hole can be reduced, thereby suppressing the sliding resistance of the first rod. As a result, the force required to drive the first rod can be reduced, and the occurrence of operational abnormalities in the dust solidification device can be suppressed. In addition, the groove on the outer periphery of the tip of the rod grinds away dust adhering to the inner wall of the forming hole, and the ground dust is then expelled from the groove, effectively preventing dust from adhering to the inner wall of the forming hole.

[0008] In one embodiment, the second rod has a shape similar to that of the first rod. That is, the second rod has a rod tip and a rod base, and the axial vertical cross section of the rod tip of the second rod is larger than the axial vertical cross section of the rod base of the second rod and smaller than the axial vertical cross section of the forming hole. By enlarging the rod tip of the second rod relative to the rod base, the rod tip of the second rod can grind away dust adhering to the inner wall of the forming hole and the sliding area between the second rod and the inner wall of the forming hole can be reduced, thereby suppressing the sliding resistance of the second rod.

[0009] In one embodiment, the rod tip portion of the first rod and / or the second rod is detachable from the rod base portion, which allows worn rod tip portions to be replaced, thereby improving maintainability.

[0010] In one embodiment, grooves are provided on the outer periphery of the tip end of the first rod and / or the second rod, which allows dust adhering to the inner wall of the forming hole to be ground away and the ground dust to be discharged through the grooves, thereby effectively preventing dust from adhering to the inner wall of the forming hole. [Effects of the Invention]

[0011] According to at least one embodiment of the present disclosure, it is possible to provide a dust solidification device in which the sliding resistance of the rod is suppressed. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a diagram showing a schematic configuration of a dust solidification device according to an embodiment. [Figure 2] 1 is a perspective view showing the vicinity of the rod tip portions of a pressure rod and a closing rod applied to a dust solidification device according to an embodiment. FIG. [Figure 3] 10 is a view showing a side surface of a pressure rod into which a tip end portion of the pressure rod, which is a ring-shaped member, is fitted. FIG. [Figure 4]10 is a view showing a side surface of a pressure rod into which a tip end portion of the pressure rod, which is a cap-shaped member, is fitted. FIG. [Figure 5] FIG. 4 is a cross-sectional view showing the inside of a molding hole during a dust solidification operation of the dust solidification device according to the embodiment. [Figure 6] FIG. 2 is a schematic diagram showing the diameter and thickness of a rod tip portion. [Figure 7] FIG. 2 is a vertical cross-sectional view in the axial direction showing the relationship between the diameters of the rod tip, the rod base, and the molding hole. [Figure 8] 1 is a schematic diagram showing a tip portion of a pressure rod having a regular hexagonal cross section perpendicular to the axial direction. FIG. [Figure 9] 1 is a vertical axial cross-sectional view showing a state in which a tip end portion of a pressure rod having a circular cross-section perpendicular to the axial direction is advanced into a forming hole having a regular hexagonal cross-section perpendicular to the axial direction. FIG. [Figure 10] 1 is a vertical axial cross-sectional view showing a state in which a tip end portion of a pressure rod having a regular hexagonal cross-section perpendicular to the axial direction is advanced into a forming hole having a circular cross-section perpendicular to the axial direction. FIG. [Figure 11] FIG. 10 is a perspective view showing a rod tip member that is a modified example of the pressure rod and / or the closing rod that is applied to the dust solidification device according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, several embodiments of the present disclosure will be described with reference to the drawings. However, the dimensions, materials, shapes, relative positions, etc. of the components described as embodiments or shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative examples. The terms "upper" and "lower" are based on the state shown in the drawings and are for convenience.

[0014] Fig. 1 is a diagram showing a schematic configuration of a dust solidification device 1 according to this embodiment. The dust solidification device 1 shown in Fig. 1 includes a storage tank (e.g., a hopper) 11 and a dust solidification unit 12 disposed below the storage tank 11.

[0015] The storage tank 11 has an inclined side wall 110 and stores dust that falls from above.

[0016] The dust solidification unit 12 includes a forming member 121 having a forming hole 122, a pressure rod 123 which is a first rod, a closing rod 124 which is a second rod, a discharge hole 125 through which the formed solidified material is discharged, a pressure cylinder 126 which drives the pressure rod 123, and a closing cylinder 127 which drives the closing rod 124. The forming hole 122 is disposed between the pressure rod 123 and the closing rod 124, and is a through-hole into which the pressure rod 123 and the closing rod 124 can be inserted.

[0017] The forming member 121 is a member provided with a forming hole 122 so that dust from the lower part of the storage tank 11 can flow in. The forming hole 122 is disposed between the pressure rod 123 and the closing rod 124, and is a through-hole through which the pressure rod 123 and the closing rod 124 can be inserted, with a first opening 1221 and a second opening 1222 passing through. Here, the axial vertical cross section of the forming hole 122 (a cross section crossing the long axis direction) is circular.

[0018] The pressure rod 123 is a first rod having a circular cross section perpendicular to the axial direction and capable of reciprocating movement, advancing and retreating from a first opening 1221 into the forming hole 122. The closing rod 124 is a second rod having a circular cross section perpendicular to the axial direction and capable of reciprocating movement, advancing and retreating from a second opening 1222 into the forming hole 122, and is a rod that advances a certain distance into the forming hole 122 and stops when forming the solidified material. The pressure rod 123 is driven to reciprocate, advancing and retreating into the forming hole 122, and when it retreats from the forming hole 122, dust at the bottom of the storage tank 11 flows into the forming hole 122. The pressure rod 123 advances into the forming hole 122 and pushes in the dust that has flowed into the forming hole 122. In the forming hole 122, the dust is pressed and compressed by the pressure surfaces of the pressure rod 123 and the closing rod 124, which are opposed to each other, to form a pellet-shaped solidified material.

[0019] The discharge hole 125 is a hole for dropping and discharging the molded solidified material. The molded solidified material is sandwiched between the pressure rod 123 and the closing rod 124, and transported to the discharge hole 125 and discharged. The pressure cylinder 126 is a drive source for reciprocating the pressure rod 123. The closing cylinder 127 is a drive source for reciprocating the closing rod 124.

[0020] It should be noted that the present disclosure is not limited to the embodiment shown in FIG. 1, and the positions of the pressure rod 123 and the pressure cylinder 126 and the positions of the closing rod 124 and the closing cylinder 127 may be interchanged.

[0021] The operation of the dust solidification device 1 shown in Fig. 1 is controlled by a control unit (not shown). Specifically, the control unit (not shown) outputs operation commands to the pressurizing cylinder 126 and the closing cylinder 127 to control the operations of the pressurizing rod 123 and the closing rod 124.

[0022] 2 is a perspective view showing the vicinity of the rod tips of the pressure rod 123 and the closing rod 124 applied to the dust solidification apparatus 1 according to this embodiment. The pressure rod 123 includes a pressure rod tip 1231 and a pressure rod base 1232. The closing rod 124 includes a closing rod tip 1241 and a closing rod base 1242.

[0023] The vertical axial cross section of the pressure rod tip 1231 of the pressure rod 123 is larger than the vertical axial cross section of the pressure rod base 1232 of the pressure rod 123 and smaller than the vertical axial cross section of the forming hole 122. Here, the vertical axial cross sections of the pressure rod tip 1231 and the pressure rod base 1232 are circular. The vertical axial cross section of the closure rod tip 1241 of the closure rod 124 is larger than the vertical axial cross section of the closure rod base 1242 of the closure rod 124 and smaller than the vertical axial cross section of the forming hole 122. The vertical axial cross sections of the closure rod tip 1241 and the closure rod base 1242 are circular.

[0024] The pressure rod tip 1231 may be integrally formed with the pressure rod base 1232, or may be configured to be detachable from the pressure rod base 1232. The closing rod tip 1241 may be integrally formed with the closing rod base 1242, or may be configured to be detachable from the closing rod base 1242. If the rod tip is detachable from the rod base, worn rod tips can be replaced. This improves maintainability. Here, since the pressure rod 123 advances and retreats more frequently than the closing rod 124 during the dust solidification operation, it is particularly preferable that the pressure rod tip 1231 of the pressure rod 123 be detachable from the pressure rod base 1232. Note that threads are provided on the surfaces of the pressure rod tip 1231 and the closing rod tip 1241 opposite to the surfaces that contact the dust, and a detachable configuration can be achieved by screwing these threads into the rod base. Alternatively, the pressure rod tip 1231 and the closing rod tip 1241 can be configured to be detachable by a ring-shaped member such as an O-ring or a cap-shaped member fitted into the rod base 1232. Fig. 3 is a diagram showing a side view of the pressure rod 123a into which the pressure rod tip 1231a, which is a ring-shaped member, is fitted, and Fig. 4 is a diagram showing a side view of the pressure rod 123b into which the pressure rod tip 1231b, which is a cap-shaped member, is fitted. Note that although Figs. 3 and 4 show the pressure rods 123a and 123b, the closing rod can also have a similar shape.

[0025] Furthermore, it is preferable that the pressure rod tip 1231 and the closing rod tip 1241 are made of a highly wear-resistant material, which can suppress wear of the pressure rod tip 1231 and the closing rod tip 1241.

[0026] Fig. 5 is a cross-sectional schematic diagram showing the inside of the forming hole 122 during the dust solidification operation of the dust solidification device 1 according to this embodiment. In Fig. 5, a closing rod 124 having a closing rod tip 1241 and a closing rod base 1242 advances and retreats into the forming hole 122 where the closing rod 124 is stationary, and the dust solidification operation is performed by the reciprocating motion of the pressing rod 123.

[0027] The pressure rod tip 1231 of the pressure rod 123 and the closing rod tip 1241 of the closing rod 124 compress the dust to form a solidified material 201. As shown in FIG. 5 , by expanding the pressure rod tip 1231 of the pressure rod 123 relative to the pressure rod base 1232, the pressure rod tip 1231 of the pressure rod 123 can grind away the dust 200 adhering to the inner wall 1223 of the forming hole 122, and the sliding area between the pressure rod 123 and the inner wall 1223 of the forming hole 122 can be reduced. This reduces the sliding resistance of the pressure rod 123. This reduces the force required to drive the pressure rod 123, thereby preventing operational abnormalities in the dust solidification apparatus 1 and enabling the dust solidification apparatus 1 to be made more compact and more energy-efficient.

[0028] FIG. 6 is a schematic diagram showing the diameter D and thickness w of the rod tip. FIG. 6 also shows the diameter R of the pressure rod base 1232, the diameter D of the pressure rod tip 1231, the thickness w of the pressure rod tip 1231, and the diameter difference d between the pressure rod base 1232 and the pressure rod tip 1231. FIG. 7 is a vertical axial cross-sectional view showing the relationship between the diameters of the rod tip, the rod base, and the forming hole. FIG. 7 also shows the diameter R of the pressure rod base 1232, the diameter D of the pressure rod tip 1231, the diameter r of the forming hole 122, and the diameter difference d between the pressure rod base 1232 and the pressure rod tip 1231. Note that while FIGS. 6 and 7 show the pressure rod 123, the closing rod 124 may also have a similar shape. The diameter D of the pressurizing rod tip 1231 and the closing rod tip 1241 is larger than the diameter R of the pressurizing rod base 1232 and the closing rod base 1242, and is smaller than the diameter r of the forming hole 122 so that they can reciprocate by advancing into and retreating from the forming hole 122. In particular, the diameter D of the pressurizing rod tip 1231 and the closing rod tip 1241 is preferably larger than the diameter R of the pressurizing rod base 1232 and the closing rod base 1242 by 0.2 mm or more and 0.4 mm or less (i.e., 0.2 mm≦d≦0.4 mm). As an example, if the diameter R of the pressurizing rod base 1232 and the closing rod base 1242 is 15 mm, the diameter D of the pressurizing rod tip 1231 and the closing rod tip 1241 can be 15.2 mm≦D≦15.4 mm.

[0029] Furthermore, it is preferable to make the thickness w of the pressure rod tip 1231 and the closing rod tip 1241 as thin as possible while still being able to withstand the load. The thickness w of the pressure rod tip 1231 and the closing rod tip 1241 is the distance from each pressure surface to the rod base. This is because a thinner thickness w of the pressure rod tip 1231 and the closing rod tip 1241 reduces the sliding area between the pressure rod 123 and the closing rod 124 and the inner wall 1223 of the forming hole 122, thereby suppressing sliding resistance. As an example, the thickness w of the pressure rod tip 1231 and the closing rod tip 1241 can be set to 0.1 mm≦w≦10.0 mm. Note that each rod is located on the axis of the forming hole, and the axial perpendicular cross section refers to a cross section that intersects the longitudinal axis of the forming hole. The axial direction is the longitudinal axis of each rod, which roughly coincides with the longitudinal axis of the forming hole.

[0030] As described above, according to the dust solidification apparatus 1 of this embodiment, by enlarging the pressure rod tip 1231 of the pressure rod 123 relative to the pressure rod base 1232, the pressure rod tip 1231 of the pressure rod 123 grinds off dust adhering to the inner wall 1223 of the forming hole 122, and the sliding area between the pressure rod 123 and the inner wall 1223 of the forming hole 122 is reduced, thereby suppressing the sliding resistance of the pressure rod 123. As a result, the occurrence of operational abnormalities in the dust solidification apparatus 1 can be suppressed.

[0031] Furthermore, if the closing rod 124 is shaped similarly to the pressure rod 123 and the closing rod tip 1241 of the closing rod 124 is enlarged relative to the closing rod base 1242, the closing rod tip 1241 of the closing rod 124 will grind away dust adhering to the inner wall 1223 of the forming hole 122, and the sliding area between the closing rod 124 and the inner wall 1223 of the forming hole 122 will be reduced, thereby reducing the sliding resistance of the closing rod 124.

[0032] (Variation 1) In this embodiment, the vertical axial cross sections of the forming hole 122, the pressurizing rod tip 1231, and the closing rod tip 1241 have been described as being circular, but the present invention is not limited to this. As a modification of this embodiment, the vertical axial cross sections of the forming hole 122, the pressurizing rod tip 1231, and the closing rod tip 1241 may be polygonal, such as a regular hexagon. FIG. 8 is a schematic diagram showing a pressurizing rod tip 1231c having a regular hexagonal vertical axial cross section. In FIG. 8, the pressurizing rod tip 1231c extends into the forming hole 122a, which has a regular hexagonal vertical axial cross section. Note that while FIG. 8 shows the pressurizing rod of the pressurizing rod tip 1231c, the closing rod 124 may also have a similar shape. The vertical axial cross sections of the pressurizing rod base 1232 and the closing rod base 1242 may also be polygonal, such as a regular hexagon.

[0033] Furthermore, the vertical axial cross section of the rod tip and the vertical axial cross section of the rod base do not have to coincide. Fig. 9 is a vertical axial cross section showing a state in which a pressurizing rod tip 1231 having a circular cross section has advanced into a forming hole 122a having a regular hexagonal cross section, and Fig. 10 is a vertical axial cross section showing a state in which a pressurizing rod tip 1231c having a regular hexagonal cross section has advanced into a forming hole 122 having a circular cross section.

[0034] (Variation 2) As a modification of this embodiment, a groove may be provided on the outer periphery of the pressurizing rod tip 1231 and / or the closing rod tip 1241.

[0035] FIG. 11 is a perspective view showing a rod tip member 1203, which is a modified example of the pressure rod 123 and / or the closing rod 124 used in the dust solidification apparatus 1 according to this embodiment. FIG. 11 shows the rod tip member 1203, which includes a rod tip portion 1201 with a groove formed on its outer periphery and a rod mounting portion 1202. The rod tip member 1203 shown in FIG. 11 has a groove 1204 formed in the rod tip portion 1201 at an angle relative to the thickness direction of the rod tip portion. The groove 1204 thus formed grinds away dust adhering to the inner wall 1223 of the molding hole 122, and the ground dust is discharged through the groove 1204, thereby effectively preventing dust from adhering to the inner wall 1223 of the molding hole 122. However, the shape of the groove 1204 is not limited to that shown in FIG. 11 and is not limited to a specific shape as long as it is capable of grinding away dust adhering to the inner wall 1223 of the molding hole 122 and discharging the ground dust. For example, a flat or cross grain may be formed by groove processing or knurling.

[0036] The rod tip member 1203 shown in FIG. 11 is configured to be detachable from a rod base portion (not shown), but the present invention is not limited to this. In a configuration in which the rod tip portion is integrally formed with the rod base portion, a groove may be provided on the outer periphery of the rod tip portion.

[0037] (Summary of the embodiment) According to the dust solidification apparatus 1, by enlarging the pressure rod tip 1231 of the pressure rod 123 relative to the pressure rod base 1232, the pressure rod tip 1231 of the pressure rod 123 can grind the dust 200 adhering to the inner wall 1223 of the forming hole 122 and reduce the sliding area between the pressure rod 123 and the inner wall 1223 of the forming hole 122, thereby reducing the sliding resistance of the pressure rod. As a result, the force required to drive the pressure rod is reduced, and the occurrence of operational abnormalities in the dust solidification apparatus can be suppressed. Furthermore, by giving the closing rod 124 the same shape as the pressure rod 123 and enlarging the closing rod tip 1241 of the closing rod 124 relative to the closing rod base 1242, sliding resistance can be reduced, as in the case of the pressure rod, and the occurrence of operational abnormalities in the dust solidification apparatus can be suppressed.

[0038] The pressure rod tip 1231 of the pressure rod 123 and / or the closing rod tip 1241 of the closing rod 124 are detachable from the pressure rod base 1232 and / or the closing rod base 1242, respectively, so that worn pressure rod tip 1231 and / or closing rod tip 1241 can be replaced.

[0039] Grooves are provided on the outer periphery of the pressure rod tip 1231 of the pressure rod 123 and / or the closing rod tip 1241 of the closing rod 124, so that dust adhering to the inner wall 1223 of the forming hole 122 is ground off, and the ground off dust is discharged through the groove 1204, thereby effectively preventing dust from adhering to the inner wall 1223 of the forming hole 122. [Explanation of symbols]

[0040] 1 dust solidification device, 11 storage tank, 110 inclined side wall, 12 dust solidification section, 121 molding member, 122 molding hole, 1221 first opening, 1222 second opening, 1223 inner wall, 123, 123a, 123b pressure rod, 1231, 1231a, 1231b pressure rod tip, 1232 pressure rod base, 124 closing rod, 1241 closing rod tip, 1242 closing rod base, 125 discharge hole, 126 pressure cylinder, 127 closing cylinder, 1201 rod tip, 1202 rod mounting section, 1203 rod tip member, 1204 groove, 200 dust, 201 solidified material

Claims

1. a storage tank for storing dust; a molding member disposed at a lower portion of the storage tank and having a molding hole through which dust in the storage tank flows; a first rod and a second rod opposed to each other, the first rod and the second rod being driven to reciprocate by advancing into and retreating from the forming hole, and advancing into the forming hole to compress the dust in the forming hole; the first rod has a rod tip portion and a rod base portion, the thickness of the rod tip portion of the first rod is 0.1 mm or more and 10.0 mm or less; a diameter of the rod tip portion of the first rod in a cross section perpendicular to the axial direction is larger than a diameter of the rod base portion of the first rod in a cross section perpendicular to the axial direction by 0.2 mm or more and smaller than a diameter of the molding hole in a cross section perpendicular to the axial direction; The dust solidifying device has a groove formed on the outer periphery of the tip of the rod.

2. the second rod has a rod tip portion and a rod base portion, 2. The dust solidification device according to claim 1, wherein the axial vertical cross section of the rod tip of the second rod is larger than the axial vertical cross section of the rod base of the second rod and smaller than the axial vertical cross section of the molding hole.

3. 3. The dust solidification device according to claim 1, wherein the rod tip is detachable from the rod base.

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