Cleaning Ring

Abstract

To provide a cleaning ring easily manufactured so as to be in a state suitable for making an object to be cleaned be in a cleaner state.SOLUTION: A cleaning ring is used for cleaning a member by blowing fluid to the member, and includes a hollow ring-shaped body part having a space part as a flow passage for the fluid. A through hole communicating with the space part to blow out the fluid supplied to the space part is provided on a radial inside of the body part, and the body part is made of metal.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a cleaning ring, and more particularly to a cleaning ring used to spray a fluid onto a member to clean it. [Background technology]

[0002] Conventionally, a cleaning ring with an inner diameter similar to that of the pipes is interposed between pipes. After a liquid or powder passes through the pipes, the cleaning ring sprays a solid (powder), liquid cleaning material, or air onto the inner wall of the pipe to clean the pipes. Among these, cleaning using a liquid cleaning material (cleaning liquid) is widely used (see Patent Documents 1 and 2 below). Such cleaning rings have through-holes on their inner periphery for blowing air or cleaning liquid and are used not only for cleaning pipes but also for cleaning tank sight glasses. Furthermore, because of their ring shape, such cleaning rings can also be used to insert rod-shaped objects into the interior and clean the outer surface of the rod-shaped object. For example, in a reaction vessel, an opening is provided in the ceiling of the vessel, and a rotating shaft extending vertically through the opening is placed through the opening. A stirring blade is attached to the lower end of the rotating shaft to stir the reactants. A cleaning ring can also be placed in this opening to clean the rotating shaft and stirring blade. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6542561 [Patent Document 2] German Patent Application Publication No. 102009049296 Summary of the Invention [Problem to be solved by the invention]

[0004] In cleaning devices that have cleaning rings and pipes to be cleaned by the cleaning rings, it is desirable to clean the components to be cleaned to a more clean state. Therefore, it is desirable for the cleaning ring to be easily shaped to be suitable for cleaning the components to be cleaned. However, to date, this need has not been met. Therefore, an object of the present invention is to provide a cleaning ring that can be easily manufactured to be suitable for cleaning the components to be cleaned to a more clean state. [Means for solving the problem]

[0005] In order to solve the above problems, the present invention provides: A cleaning ring used to spray a fluid onto a component to clean the component, a hollow ring-shaped main body portion having a space portion therein that serves as a flow path for the fluid; a through-hole communicating with the space and configured to blow out the fluid supplied to the space is provided on the radially inner side of the main body; The cleaning ring has a body made of metal. [Effects of the Invention]

[0006] In one aspect of the present invention, the problem can be solved by the above-described means. In one aspect of the present invention, by making the main body out of metal, drilling and cutting processes can be easily performed, and processing into a shape suitable for the object to be cleaned can be easily performed due to excellent processing accuracy. Furthermore, according to this aspect of the invention, having a metal main body allows fluid to be sprayed at high pressure. Furthermore, if the main body is made of resin, it is difficult to use highly lipophilic fluids that may swell the resin or high-temperature fluids that may soften the resin, but the invention according to this aspect makes it possible to use such fluids. [Brief explanation of the drawings]

[0007] [Figure 1]FIG. 1 is a schematic front view showing a reaction device which is a device with a cleaning function. [Figure 2] FIG. 2 is a schematic perspective view of the cleaning ring. [Figure 3] FIG. 3 is a schematic cross-sectional view (a cross-sectional view taken along the line III-III in FIG. 2) showing the cross-sectional shape of the cleaning ring. [Figure 4] FIG. 4 is a schematic front view showing how the cleaning fluid is sprayed out. [Figure 5A] FIG. 5A is a schematic plan view showing how the cleaning fluid is sprayed out (a schematic view of the main body as viewed in the direction of block arrow V in FIG. 4). [Figure 5B] Figure 5B is a schematic cross-sectional view (cross-sectional view taken along line BB in Figure 5A) showing the cross-sectional shape when the location where the first through hole is formed is cut by a plane parallel to the central axis of the ring body and the penetration direction of the first through hole. [Figure 5C] Figure 5C is a schematic cross-sectional view (cross-sectional view taken along the CC arrow in Figure 5A) showing the cross-sectional shape when the location where the second through hole is formed is cut by a plane parallel to the central axis of the ring body and the penetration direction of the second through hole. [Figure 6] FIG. 6 is a schematic perspective view showing the configuration of the ring body of the cleaning ring. [Figure 7A] FIG. 7A is a schematic diagram showing the arrangement of tapered surfaces. [Figure 7B] FIG. 7B is a schematic diagram showing another arrangement of tapered surfaces. [Figure 7C] FIG. 7C is a schematic diagram showing another arrangement of tapered surfaces. [Figure 7D] FIG. 7D is a schematic diagram showing the state of the tapered surface in an inclined position. [Figure 8] FIG. 8 is a schematic front view showing a reaction apparatus using a cleaning ring in a different manner from that shown in FIG. [Figure 9] FIG. 9 is a schematic perspective view showing the cleaning ring and an imaginary plane. [Figure 10] FIG. 10 is a schematic diagram showing how the cleaning liquid reaches the imaginary surface in FIG. [Figure 11]FIG. 11 is a schematic diagram showing a case where a through hole different from that in FIG. 10 is provided. [Figure 12A] FIG. 12A is a schematic cross-sectional view showing another embodiment of a cleaning ring. [Figure 12B] FIG. 12B is a schematic diagram showing the main body of the cleaning ring of FIG. 12A disassembled into its constituent members. DETAILED DESCRIPTION OF THE INVENTION

[0008] One embodiment of the present invention will be described below with reference to the drawings. In this embodiment, the apparatus to which the cleaning ring is to be provided is a reactor having a glass-lined reaction vessel, but the cleaning ring of this embodiment can be used for products other than glass-lined products, and can also be used for other apparatuses other than reactors, such as filtration apparatuses and drying apparatuses.

[0009] FIG. 1 shows a reaction apparatus 1, which is an apparatus with a cleaning function according to this embodiment. The reaction apparatus 1 includes a reaction vessel 10 and is configured so that raw materials are supplied through piping connected to the reaction vessel 10. The reaction apparatus 1 has a piping (hereinafter also referred to as "apparatus piping 11a") to which a piping (hereinafter referred to as "external apparatus piping PX") for supplying raw materials to the reaction apparatus 1 from the outside can be connected. The apparatus piping 11a according to this embodiment is provided so as to extend a short distance from the reaction vessel 10. The reaction apparatus 1 according to this embodiment further includes a cleaning ring 20 detachably attached to the end of the apparatus piping 11a. That is, the cleaning ring 20 is provided so as to be interposed between the external apparatus piping PX and the apparatus piping 11a when the external apparatus piping PX is connected.

[0010] The cleaning ring 20 of this embodiment is used by being interposed between two members as described above. In this embodiment, one of the two members is positioned above the other member, and the cleaning ring 20 is used by being sandwiched between the two members from above and below. In this embodiment, a case is exemplified in which the one member positioned above the other member is the external piping PX, and the other member positioned below the other member is the apparatus piping 11a, but the two members between which the cleaning ring 20 is interposed are not limited to such specific members.

[0011] The reaction vessel 10 of this embodiment has a storage space 10c for storing raw materials to be reacted. The reaction vessel 10 of this embodiment has a glass lining on the exposed portion of the storage space 10c to provide corrosion resistance. The reaction vessel 10 of this embodiment has a vessel body 110 including a bottom wall portion 12 that is circular in plan view, a peripheral wall portion 13 that is cylindrical and extends upward from the outer periphery of the bottom wall portion 12, and a ceiling wall portion 14 that is circular in plan view and is arranged opposite the bottom wall portion 12 in the vertical direction to close the upper end of the peripheral wall portion 13. In the reaction vessel 10 of this embodiment, the storage space 10c is defined by the inner wall surface of the vessel body 110.

[0012] In the reaction vessel 10 of this embodiment, openings communicating with the accommodation space 10c are provided at four locations on the ceiling wall 14. One of the four openings is a manhole (not shown) fitted with a lid equipped with an observation window made of a glass plate. One of the remaining three openings is a material supply port 14a through which raw materials are supplied via the external piping PX. The remaining two openings are an agitator mounting port 14b and a baffle mounting port 14c for mounting an agitator 30 and a baffle 40, respectively.

[0013] The agitator mounting port 14b opens approximately at the center of the ceiling wall 14. The material supply port 14a and the baffle mounting port 14c are arranged on the left and right sides of the ceiling wall 14, sandwiching the agitator mounting port 14b. The reaction vessel 10 further includes short cylindrical portions extending upward from the material supply port 14a, the agitator mounting port 14b, and the baffle mounting port 14c of the vessel body 110. The openings at the edges of each cylindrical portion are openings at the upper end of the reaction vessel 10 and open upward. These openings can be used to communicate the storage space 10c with the space outside the reaction vessel (external space). The first cylindrical portion extending from the material supply port 14a is the apparatus piping 11a, which is connected to the external piping PX. The second cylindrical portion 11b extending from the agitator mounting port 14b is used to insert the rotation shaft 31 of the agitator 30. The third cylindrical portion 11c extending from the baffle mounting port 14c is used to insert the baffle 40. The apparatus piping 11a communicates with the external piping PX, while the second cylindrical portion 11b and the third cylindrical portion 11c are closed by lids.

[0014] The external piping PX is connected to the first cylindrical portion, the apparatus piping 11a, while a cover 15 is attached to each of the second cylindrical portion 11b and the third cylindrical portion 11c, similar to the manhole (not shown). The cover 15 is attached to the top of each cylindrical portion so as to cover the opening at the upper edge of the cylindrical portion. The rotating shaft 31 extends vertically through the center of the second cylindrical portion 11b, penetrates the cover 15 attached to the top of the second cylindrical portion 11b, and extends above the cover 15. In the third cylindrical portion 11c, a baffle 40, the upper end of which is fixed to the cover 15, extends downward through the center of the third cylindrical portion 11c.

[0015] As described above, the cleaning ring 20 is interposed between the apparatus piping 11a and the external piping PX. The apparatus piping 11a and the external piping PX have roughly the same inner diameter. As shown in FIG. 2, the cleaning ring 20 has an annular main body 210, and the inner diameter of the main body 210 is the same as the inner diameter of the apparatus piping 11a and the external piping PX. The cleaning ring 20 is provided in the reaction apparatus 1 by attaching the main body 210 above the upper edge of the apparatus piping 11a (first cylindrical portion) that defines the upper opening of the reaction tank 10. The ring-shaped main body 210 is attached above the apparatus piping 11a so as to surround part or all of the opening. More specifically, the cleaning ring 20 is attached to the upper end of the device piping 11a so that the central axis 11ac of the device piping 11a coincides with the central axis 210c of the main body 210, and is arranged to extend the flow path of the device piping 11a by the thickness of the main body 210 in the central axial direction. The external piping PX is arranged so that its central axis coincides with the central axes of the cleaning ring 20 and the device piping 11a. That is, in this embodiment, the device piping 11a, the external piping PX, and the main body 210 have flush inner circumferential surfaces, and the three circumferential surfaces are connected to form a single cylinder.

[0016] The outer diameter of the main body 210 in this embodiment is equal to or smaller than the outer diameter of the device piping 11a and the external piping PX. That is, the radial dimension of the main body 210 is equal to or smaller than the wall thickness of the piping to which the main body 210 is attached. The inner diameter of the piping is φ pi , the outer diameter is φ po and the inner diameter φ of the main body ri , the outer diameter is φ ro When the inner diameter is set as above, pi =φ ri " and the outer diameter is "φ po ≧φ ro The inner diameter (φ ri ) is the inner diameter of the pipe (φ pi ) with a slightly larger diameter (φ ri >φ pi The outer diameter (φ ro ) is the inner diameter of the pipe (φ po) is slightly smaller in diameter (φ ro <φ po ) that is, the main body 210 may have a shape that fits within the cross-sectional shape of the piping to which the main body 210 is attached when viewed along the direction of the central axis. When flange portions are provided at the respective ends of the device piping 11a and the external piping PX that are connected via the main body 210 and fastening is performed using a clamp or the like using the flange portions, the outer diameter (φ ro ) may be slightly larger than the outer diameter of the pipe and smaller than the outer diameter of the flange to which the main body 210 is attached. When the flanges are fastened together with bolts and nuts, the outer diameter of the main body 210 is sized to fit inside the bolt positions.

[0017] As described above, the cleaning ring 20 of this embodiment includes a storage space 10c for storing objects to be stored and an opening that connects the storage space 10c to the outside space, and is used in a reaction apparatus 1 in which a reaction of the objects to be stored occurs. The cleaning ring 20 of this embodiment can be used as equipment and / or associated facilities for an apparatus used in a process involving a chemical reaction of objects to be processed, including one or more chemical substances and / or one or more compounds. The cleaning ring 20 of this embodiment can be used as equipment and / or associated facilities for a chemical process that changes the chemical substances or compounds contained in the objects to be processed in some way. The energy supplied to the apparatus to change the chemical substances or compounds may be not only another chemical substance or compound that can react with the chemical substance or compound to be changed, but also at least one of, for example, thermal energy, light energy, electrical energy, magnetic energy, and kinetic energy. The apparatus may be supplied with these energies in addition to another chemical substance or compound. When the cleaning ring 20 of this embodiment is used as equipment and / or its auxiliary equipment for chemical processes, the contents may contain only chemical substances or compounds, or may contain a solvent or dispersant capable of dissolving the chemical substances or compounds. The contents may be food or beverages containing the chemical substances or compounds to be transformed as one of their components, or organic compositions (e.g., plastic compositions, rubber compositions, pharmaceuticals) or inorganic compositions (e.g., glass compositions, metal compositions, ceramic compositions) containing the chemical substances or compounds as one of their components. The cleaning ring 20 of this embodiment is used in equipment and / or its auxiliary equipment in, for example, pharmaceutical manufacturing, food manufacturing, and semiconductor manufacturing. The cleaning ring 20 may be used not only in reaction equipment that chemically reacts with the processed material, but also in equipment that performs processes other than chemical reactions. The cleaning ring 20 may also be a processing device (e.g., a mixer, a stirrer, a filter, or a dryer) that performs physical processes such as mixing, stirring, filtering, and drying. These devices may perform both chemical reactions and physical processes, or only physical processes. The cleaning ring 20 of this embodiment can also be suitably used in a storage device for storing contents.The cleaning ring 20 can be suitably used for cleaning between batches in a batch processing apparatus in which the processed material is discharged from the storage space and the next material to be processed is introduced into the storage space. The cleaning ring 20 can be used in a batch processing apparatus in which the opening is used as an attachment port for equipment, an observation window, or a flow path for the stored material. The cleaning ring 20 can also be used in semi-batch processing apparatus and continuous processing apparatus in which a portion of the stored material is replaced.

[0018] The main body 210 of this embodiment has the above-described shape as viewed in the central axis direction, so that when it is sandwiched between the device piping 11a and the external piping PX and secured with bolts, nuts, or clamps, pressure acts on the entire body, preventing strong pressure from being applied to only a portion. However, doing so limits the size of the main body 210. Furthermore, as will be described later, the main body 210 is hollow, which limits the wall thickness, etc. In this embodiment, the main body 210 is made of metal, resulting in a small size yet high strength.

[0019] The device piping 11a, the external piping PX, and the main body 210 may be connected so as to be in direct contact with one another with an O-ring or the like sandwiched therebetween, or may be connected with a gasket sandwiched therebetween.

[0020] The cleaning ring 20 in this embodiment is used to spray a cleaning liquid from its inner periphery to wash away raw materials adhering to the inner wall surfaces of the external pipe PX and the apparatus pipe 11a, thereby cleaning both pipes. The cleaning liquid may be a solution in which a solute is dissolved in a solvent such as water or an organic solvent, or a dispersion containing suspended solids. The cleaning liquid may also contain air bubbles such as microbubbles in addition to the solute and suspended solids. While the cleaning liquid is sprayed from the cleaning ring 20 in this embodiment, the fluid sprayed from the cleaning ring 20 to clean the pipes is not limited to a liquid but may also be a particulate solid. In addition to liquid and solid cleaning materials (liquid and granular), gases may also be used as the fluid. That is, in this embodiment, nitrogen gas or carbon dioxide gas may be used as the fluid, and the cleaning ring 20 may perform cleaning using an airflow generated by the gas. The fluid may contain cleaning material particles in the airflow. That is, the specific mode of spraying the cleaning material from the cleaning ring 20 may be an air current containing liquid particles (mist spray) or an air current containing solid particles (powder spray).The specific mode of spraying the cleaning material from the cleaning ring 20 may be a liquid containing solid particles (slurry) or a liquid containing bubbles (gas-liquid mixed fluid).

[0021] In this embodiment, the main body 210 of the cleaning ring 20 does not have a solid structure, but is a hollow ring as shown in FIG. 3. That is, the main body 210 has a space 210a therein. The space 210a is used as a flow path for the cleaning liquid. The space 210a in this embodiment is continuous in the circumferential direction R, and is provided so as to pass through the inside of the main body 210 and circle around the central axis 210c of the main body 210. That is, the main body 210 in this embodiment has an annular flow path through which the cleaning liquid flows.

[0022] The cleaning ring 20 in this embodiment has a first direction D1 that is a direction along the central axis 210c of the main body portion 210. The main body portion 210 is arranged so that the first direction D1 is a vertical direction (perpendicular direction), and the cross-sectional shape of the main body portion 210 in a plane perpendicular to the circumferential direction R is a vertically elongated rectangle as shown in Fig. 5B. That is, the cross-sectional shape is a rectangle whose dimension in the first direction D1 is slightly larger than its dimension in the radial direction D2.

[0023] The main body 210 has a rectangular cross-sectional shape, and an outer surface 210s that defines its outer shape is composed of four surfaces. The outer surface 210s has four surfaces: a cylindrical inner circumferential surface 210s1, an outer circumferential surface 210s2 that has a larger diameter than the inner circumferential surface 210s1, an upper surface 210s3, and a lower surface 210s4. The upper surface 210s3 and the lower surface 210s4 are both annular (donut-shaped) when viewed in the first direction D1. The upper surface 210s3 and the lower surface 210s4 are annular in shape, with inner and outer diameters corresponding to the diameters of the inner circumferential surface 210s1 and the outer circumferential surface 210s2.

[0024] The cross-sectional shape of the space 210a is trapezoidal, as shown in Fig. 5B. Therefore, the inner surface 210i of the main body 210 that defines the space 210a is also composed of four surfaces. The inner surface 210i includes an inner peripheral surface 210i1 that defines the inner peripheral edge of the space 210a, an outer peripheral surface 210i2 that defines the outer peripheral edge of the space 210a, a ceiling surface 210i3 that defines the upper edge of the space 210a, and a bottom surface 210i4 that defines the lower edge of the space 210a.

[0025] An inner peripheral surface 210i1 of the inner surface 210i of the main body portion 210 has a larger diameter than an inner peripheral surface 210s1 of the outer surface 210s, and the difference between these diameters is the wall thickness of the main body portion 210 on the inner peripheral side. An outer peripheral surface 210i2 of the main body portion 210 has a smaller diameter than an outer peripheral surface 210s2 of the outer surface 210s, and the difference between these diameters is the wall thickness of the main body portion 210 on the outer peripheral side.

[0026] The wall thickness of the main body 210 is preferably 0.5 mm or more even at the thinnest part of the main body 210. The minimum wall thickness of the main body 210 may be 1.0 mm or more, 1.5 mm or more, or 2.0 mm or more. The minimum wall thickness of the main body 210 is usually 8 mm or less. By setting the wall thickness of the main body 210 to such a thickness, the through holes described below can be accurately machined by electric discharge machining.

[0027] The ceiling surface 210i3 is annular in shape with a horizontal plate surface, similar to the upper surface 210s3 of the outer surface 210s. On the other hand, the bottom surface 210i4 has an annular shape when viewed in the first direction, but is tapered downward inward in the radial direction. That is, the distance from the ceiling surface 210i3 to the bottom surface 210i4 increases as it approaches the inner peripheral surface 210i1 from the outer peripheral surface 210i2. In other words, the dimension of the space 210a in the first direction D1 increases radially inward, and the space 210a in this embodiment becomes wider in the axial direction toward the inside.

[0028] 4 and 5A-C, a through hole 210h that communicates with the space 210a and that allows the cleaning liquid supplied to the space 210a to be sprayed out is provided on the inner side of the main body 210 in the radial direction D2. The through hole 210h extends from an inner circumferential surface 210i1 of the inner surface 210i to an inner circumferential surface 210s1 of the outer surface 210s and opens at the inner circumferential surface 210s1. As will be described in detail later, a plurality of through holes 210h are provided in the main body 210, and the through holes 210h are arranged at equal intervals in the circumferential direction on the inner circumferential surface 210s1.

[0029] The cleaning ring 20 in this embodiment further includes a piping portion 220 extending outward in the radial direction D2 from the outer periphery of the main body portion 210. The internal space of the piping portion 220 communicates with the space portion 210a of the main body portion 210, and is used as a supply path for cleaning liquid to the space portion 210a. The piping portion 220 in this embodiment first extends in the radial direction D2 and then bends to be parallel to the first direction D1. The piping portion 220 opens on the outer periphery side of the space portion 210a, more specifically, opens on the outer periphery surface 210i2.

[0030] As described above, in the space 210a in this embodiment, the width in the axial direction is wider on the inner side in the radial direction D2 where the plurality of through holes 210h are formed than on the outer side in the radial direction D2 where the piping portion 220 is connected. Therefore, in this embodiment, the pressure of the fluid supplied from the piping portion 220 is easily propagated in the circumferential direction, and the problem of the fluid being forcefully sprayed out only from the through holes 210h close to the piping portion 220 and the force of the fluid weakening on the opposite side is suppressed. In this embodiment, the cleaning liquid is supplied to the main body portion 210 at high pressure to clean the inner wall surface of the external piping PX, and therefore the main body portion 210 as described above, which is less likely to generate a pressure gradient in the circumferential direction, can be said to be preferable.

[0031] When the main body portion 210 is in a horizontal position and arranged so that the first direction is vertical, the angle θ1 (radially outward elevation angle (radially inward depression angle)) at which the bottom surface 210i4 (tapered surface) is inclined with respect to the horizontal plane HP can be, for example, 15 degrees or more. The angle θ1 may be 20 degrees or more, 25 degrees or more, or 30 degrees or more. The angle θ1 can be, for example, 50 degrees or less. The angle θ1 may be 45 degrees or less, or 40 degrees or less.

[0032] The cleaning ring 20 in this embodiment further includes a flange portion 230 extending outward from the end of the piping portion 220 on the opposite side to the main body portion 210. The cleaning ring 20 in this embodiment is configured so that it can be connected to an external piping PY for supplying a cleaning liquid to the cleaning ring 20 using the flange portion 230.

[0033] In the cleaning ring 20 of this embodiment, the main body 210, the piping 220, and the flange 230 are all made of metal, and the components that make up each of these are connected by welding. That is, in this embodiment, all of the components that make up the wall surfaces that define the space 210a are made of metal, and the piping 220 that defines the inner wall surfaces of the space communicating with the space 210a is also made of metal.

[0034] The metal constituting the cleaning ring 20 may be, for example, a nickel-based alloy, an iron-based alloy, or a copper-based alloy. The metal may also be a corrosion-resistant metal, such as a nickel-based alloy such as Hastelloy or an iron-based alloy such as stainless steel. The cleaning ring 20 may be plated on the main body 210 or other parts. The cleaning ring 20 may also be made of a clad material in which different metals are laminated.

[0035] The cleaning ring 20 in this embodiment is provided with a plurality of through holes 210h at predetermined intervals in the circumferential direction R on the inner side in the radial direction D2 of the main body part 210. The plurality of through holes 210h are provided so as to communicate between the space part 210a and a space (external space) inside the inner wall surface in the radial direction D2 of the main body part 210. In other words, the main body part 210 in this embodiment is configured so that the cleaning liquid can be sprayed out simultaneously from the plurality of through holes 210h by supplying the cleaning liquid to a single space part that forms a flow path (annular flow path) of the cleaning liquid.

[0036] The plurality of through holes 210h in this embodiment include first through holes 210h1 from which the spraying direction of the cleaning liquid as viewed in the first direction along the first direction D1 is a direction toward the central axis 210c, and second through holes 210h2 from which the spraying direction of the cleaning liquid is a direction (Dx) inclined with respect to the direction toward the central axis 210c. In this embodiment, there are a plurality of second through holes 210h2.

[0037] The plurality of through holes 210h in this embodiment include a plurality of second through holes 210h2 in which the spraying direction of the cleaning liquid is inclined clockwise or counterclockwise with respect to the direction toward the central axis 210c. The plurality of through holes 210h in this embodiment include a plurality of second through holes 210h2 in which the spraying direction of the cleaning liquid is inclined clockwise or counterclockwise with respect to the direction toward the central axis 210c and the angle of inclination is also inclined. The plurality of second through holes 210h2 are arranged on the inner circumferential side of the main body portion 210 at regular intervals in the circumferential direction.

[0038] In this embodiment, the first through-hole 210h1 and the second through-hole 210h2 of the cleaning ring 20 are provided so that the spray direction of the cleaning liquid is obliquely upward when the cleaning ring 20 is positioned so that the first direction D1 is vertical. That is, the first through-hole 210h1 and the second through-hole 210h2 are arranged so that the cleaning liquid is sprayed obliquely downward onto the inner wall surface of the external piping PX.

[0039] At this time, the cleaning liquid is sprayed from the second through holes 210h2 in a direction inclined with respect to the direction toward the central axis 210c, so that the cleaning liquid hits the inner wall surface of the external pipe PX at an angle with respect to the normal direction, and as a result, the cleaning liquid that hits the wall surface moves in a spiral along the inner wall surface. In this embodiment, since there are multiple second through holes 210h2 that have a common inclined direction, the cleaning liquid sprayed from these multiple second through holes 210h2 flows in a spiral while mutually strengthening its momentum.

[0040] When spraying cleaning liquid from multiple through holes, it is preferable to prevent interference between them. That is, it is preferable that the orientation of the second through holes (θd and θh described below) be such that the fluid sprayed from one second through hole does not interfere with the flow of the fluid sprayed from another through hole (the adjacent first through hole or second through hole). More specifically, it is preferable that the fluid sprayed from the second through hole 210h2 be sprayed in a direction higher than the fluid sprayed from the through hole adjacent to it in the spraying direction. By arranging the second through holes in this way, a spiral flow can be formed without weakening the momentum of the fluid sprayed from the second through hole.

[0041] In this embodiment, at least one of the second through holes 210h2 is arranged so that a straight line extending from the second through hole in the direction in which the fluid is blown out does not intersect with straight lines extending from the other second through holes, nor with a straight line extending from the first through hole 210h1. In the main body 210 of this embodiment, the straight lines extending from each of the multiple second through holes 210h2 in the direction in which the fluid is blown out do not intersect with each other, and do not intersect with the straight lines extending from all of the first through holes 210h1. Note that the straight lines extending in the direction in which the fluid is blown out refer to extensions of straight lines passing through the centers of the respective through holes.

[0042] The angle θd that the direction in which the second through hole 210h2 penetrates the wall of the main body portion 210 makes with the radial direction D2 when viewed in the first direction can be, for example, 10 degrees or more. The angle θd can be, for example, 20 degrees or more. The angle θd may be, for example, 30 degrees or more. The angle θd can be, for example, 60 degrees or less. The angle θd may be 50 degrees or less, or 45 degrees or less. Note that the angle θd can be determined by measuring the angle between an imaginary line passing through the central axis 210c and the second through hole 210h2 when viewed in the first direction and an imaginary line drawn in the penetration direction Dx of the second through hole 210h2.

[0043] When the main body 210 is in a horizontal position and arranged so that the first direction is the vertical direction, the angle (elevation angle) θh formed between the direction in which the first through-hole 210h1 and the second through-hole 210h2 penetrate the wall of the main body 210 and the horizontal plane HP may be, for example, 0 degrees or more, and can be, for example, 25 degrees or more. The angle θh may be, for example, 35 degrees or more. The angle θh may be, for example, 70 degrees or less. The angle θh may be, for example, 60 degrees or less.

[0044] As described above, the cleaning ring 20 of this embodiment has the through holes 210h arranged so that the fluid is blown out in an obliquely upward direction when the main body 210 is held in a horizontal position so that the first direction D1 is vertical, and is used to clean components (external piping PX) arranged above the main body 210.

[0045] In this embodiment, a plurality of first through holes 210h1 and a plurality of second through holes 210h2 are provided in the main body portion 210, and the plurality of first through holes 210h1 and the plurality of second through holes 210h2 are arranged alternately in the circumferential direction R. In this embodiment, the plurality of first through holes 210h1 are arranged at equal intervals in the circumferential direction R, and the plurality of second through holes 210h2 are arranged at equal intervals in the circumferential direction R. In this embodiment, the interval between the first through hole 210h1 and the second through hole 210h2 that are adjacent in the circumferential direction R is also constant.

[0046] The positions where the multiple first through holes 210h1 are provided have the same height from the lower surface 210s4 of the main body portion 210 in the horizontal position. The positions where the multiple second through holes 210h2 are provided also have the same height from the lower surface 210s4 of the main body portion 210 in the horizontal position. The height where the first through holes 210h1 are provided and the height where the second through holes 210h2 are provided are also the same. In this embodiment, the first through hole 210h1 and the second through hole 210h2 have the same height (forming position in the first direction D1) and are located at a height that is approximately half the dimension of the main body portion 210. That is, the first through hole 210h1 and the second through hole 210h2 are provided so as to penetrate the inner ring 211 at the center of the inner ring 211 in the height direction.

[0047] The angle formed by the penetration direction (fluid blowing direction) of the first through hole 210h1 with respect to the horizontal plane HP and the angle formed by the penetration direction (fluid blowing direction) of the second through hole 210h2 with respect to the horizontal plane HP may be the same or different. The elevation angles of the multiple first through holes 210h1 may or may not be the same. In this embodiment, the elevation angles (θh1 in FIG. 5B) of the multiple first through holes 210h1 are the same. The elevation angles of the multiple second through holes 210h2 may or may not be the same. In this embodiment, the elevation angles (θh2 in FIG. 5C) of the multiple second through holes 210h2 are also the same. In this embodiment, the elevation angle (θh1) of the first through hole 210h1 and the elevation angle (θh2) of the second through hole 210h2 are the same.

[0048] 5A, the distance (L1) from the first through hole 210h1 to the point XP where the fluid blown out from the first through hole 210h1 and the fluid blown out from the second through hole 210h2 intersect as viewed in the first direction is shorter than the distance (L2) from the second through hole 210h2. Therefore, if the elevation angle (θh1) of the first through hole 210h1 and the elevation angle (θh2) of the second through hole 210h2 are made the same, a difference in elevation occurs between the cleaning liquids blown out from both the first through hole 210h1 and the second through hole 210h2 by the time they intersect at the point XP, and collision between the cleaning liquids can be avoided.

[0049] The cleaning liquid sprayed from the first through-hole 210h1 hits the inner wall surface of the external pipe PX in the normal direction, cleaning the inner wall surface with a strong impact force. The cleaning ring 20 of this embodiment, which has the first through-hole 210h1 with excellent ability to remove deposits and the second through-hole 210h2 capable of cleaning a wide area, can quickly clean the member to be cleaned. Furthermore, in this embodiment, since the main body 210 is made of metal, high-pressure cleaning liquid can be supplied to the space 10a.

[0050] The holes forming the first and second through holes may be formed so that the diameter is the same from the inlet to the outlet as shown in Fig. 3, but are not limited to this and may be formed so that the diameter increases from the inlet to the outlet. In this way, it is possible to widen the cleaning range when the supply pressure of the cleaning liquid or cleaning gas is increased, and the cleaning range can be varied by changing the supply pressure. Furthermore, the first through-hole and the second through-hole are formed at the same height, which allows the pressure applied to each through-hole to be approximately uniform even when the bottom of the space 210a is inclined, thereby preventing uneven cleaning.

[0051] In this embodiment, the cleaning liquid may be sprayed multiple times with different pressures and temperatures. Also, in this embodiment, different types of cleaning liquid may be sprayed multiple times. Furthermore, in this embodiment, both liquid and gas may be sprayed. By spraying gas after cleaning with liquid, the cleaning liquid adhering to the inner wall surface of the external piping PX can be blown off with an airflow, thereby drying the inner wall surface. If a substance that should be removed from the inner wall surface of the external piping PX is dissolved in the cleaning liquid, the substance will be concentrated as the droplets adhering to the wall surface dry. However, blowing off the droplets with an airflow eliminates this problem. In such a case, the pressure of the gas supplied to the main body 210 may be set higher than the supply pressure of the cleaning liquid.

[0052] As described above, the cleaning function-equipped device (reaction device 1) of this embodiment may be capable of switching the pressure conditions and temperature conditions of the fluid blown out from the cleaning ring 20 for cleaning the inside, and may be capable of switching the type of the fluid. The cleaning function-equipped device may be capable of switching the fluid blown out from the cleaning ring 20 for cleaning the inside between liquid and gas.

[0053] Only gas may be used as the fluid. The use of gas has the advantage that it can be easily cleaned without affecting the contents contained in the reaction vessel 10 (such as a mixture of raw materials simply mixed together or a reactant obtained by reacting raw materials) even when the contents remain in the reaction vessel 10. That is, gas can be easily used as a cleaning fluid regardless of whether the reaction vessel 10 is in operation or out of operation. Examples of such gas include inorganic gases such as nitrogen gas, oxygen gas, air, water vapor, carbon dioxide gas, hydrogen gas, and argon gas, and organic gases such as methane gas and propane gas. On the other hand, when a liquid is used as the fluid, the liquid may be mixed into the contents when used to clean the external piping PX during operation of the reaction vessel 10. Therefore, it is desirable to limit the use of liquid when the contents remain in the reaction vessel 10, and it is desirable to use the liquid (cleaning liquid) during outages when the reaction vessel 10 does not contain any contents.

[0054] The pressure (gauge pressure) of the fluid, such as cleaning liquid or gas, supplied to the main body 210 for cleaning can be, for example, 50 kPa or more and 900 kPa or less. The pressure is more preferably 100 kPa or more and 300 kPa or less. The temperature of the fluid supplied to the main body 210 can be, for example, -90°C or more and 260°C or less.

[0055] As described above, in the cleaning ring 20 of this embodiment, the main body 210 is made of metal. As shown in FIG. 6 , the main body 210 includes an inner ring 211 having the through-hole 210h formed therein and an outer ring 212 abutting the inner ring 211 from the radially outer side, and is configured by welding the outer ring 212 and the inner ring 211 together. The inner ring 211 is disposed so as to form an inner peripheral surface 210s1 of the main body 210 when the main body 210 is disposed so that the first direction D1 (the direction of the central axis 210c) is vertical. The outer ring 212 is disposed so as to form three surfaces of the main body 210: an upper surface 210s3, a lower surface 210s4, and an outer peripheral surface 210s2.

[0056] The upper surface 210s3 of the main body 210 faces the lower end surface of the external piping PX and is the uppermost surface of the main body 210 in a horizontal position in which the central axis 210c extends in the vertical direction. The lower surface 210s4 of the main body 210 faces the upper end surface of the apparatus piping 11a and is the lowermost surface of the main body 210 in a horizontal position in which the central axis 210c extends in the vertical direction.

[0057] The main body 210 is hollow and ring-shaped, with a space 210a therein that serves as a flow path for the cleaning liquid. A through-hole 210h is provided radially inward, communicating with the space 210a and for spraying the cleaning liquid supplied to the space 210a. The main body 210 includes multiple components, such as a cylindrical inner ring 211 that forms an inner portion and an outer ring 212 that is provided radially outward of the inner ring 211. In this embodiment, the outer ring 212 has a recess that is recessed radially outward. The space 210a in the main body 210 is formed by joining the inner ring 211 to the inner side of the outer ring 212 so as to block the recess of the outer ring 212 from the inside. The inner ring 211 has the through-hole 210h, and the outer ring 212 has a fluid supply hole 210b that supplies the cleaning liquid to the space 210a.

[0058] The recessed portion of the outer ring 212 is provided so as to form a groove 212d that extends in the circumferential direction on the inner peripheral side of the outer ring 212. In this embodiment, the groove 212d is provided around the entire circumference of the inner peripheral side of the outer ring 212. In this embodiment, the bottom surface 210i4 of the inner surface 210i of the main body portion 210 is a tapered surface that slopes downward inward in the radial direction D2. In other words, the bottom surface 210i4 slopes upward outward in the radial direction D2. Therefore, the groove 212d is formed so that the groove width narrows toward the recessed direction (outward in the radial direction D2).

[0059] The inner ring 211 is cylindrical and has a central axis common to the central axis 210c of the main body 210, extending a short distance in the first direction D1. As described above, the cleaning ring 20 of this embodiment can be configured such that the inner ring 211 and the outer ring 212 are made of separate members, making it easy to machine each into an appropriate shape. For example, forming the first through hole 210h1 and the second through hole 210h2 in the inner ring 211 before welding the outer ring 212 makes it easier to form them with accurate sizes and angles. In this way, the cleaning ring 20 of this embodiment can be easily adjusted to a shape appropriate for the object to be cleaned.

[0060] The outer ring 212 has an outer peripheral wall 212a that forms the outer peripheral surface of the main body 210, a first flange 212b that forms the upper surface of the main body 210, and a second flange 212c that forms the lower surface of the main body 210. The fluid supply hole 210b is provided to penetrate the outer peripheral wall 212a of the outer ring 212. The outer peripheral wall 212a, the first flange 212b, and the second flange 212c are provided on the outer ring 212 so that their cross-sectional shape in a plane perpendicular to the circumferential direction R is U-shaped. The inner peripheral side of the outer ring 212 is open all around, and the outer ring 212 has a U-shaped cross-sectional shape that is recessed radially outward from the opening. In this embodiment, the inner ring 211 and the outer ring 212 can be formed from separate members, so that the recessed shape of the outer ring 212 can be accurately machined.

[0061] The outer peripheral wall portion 212a is tubular and has a larger diameter than the inner ring 211, and is disposed so as to surround the inner ring 211. The first flange portion 212b extends inward in the radial direction D2 from one end of the outer peripheral wall portion 212a in the axial direction (first direction D1). The second flange portion 212c extends inward in the radial direction D2 from the other end of the outer peripheral wall portion 212a in the axial direction (first direction D1). The first flange portion 212b and the second flange portion 212c have their inner edge portions in the radial direction D2 welded to the inner ring 211.

[0062] The length (H1) of the inner ring 211 in the first direction D1 is less than or equal to the length (H2) of the outer ring 212 (H1≦H2). In the present embodiment, the inner ring 211 is slightly shorter than the outer ring 212 in terms of length, that is, it is less than the length (H2) of the outer ring 212 (H1<H2). In the main body portion 210 of the present embodiment, when viewed radially outward from the central axis 210c, a part of the inner end surface of the first flange portion 212b protrudes outside one of the two end edges of the inner ring 211 in the first direction D1, and a part of the end surface of the second flange portion 212c protrudes outside the other end edge of the inner ring 211. At one end edge of the inner ring 211, the inner ring 211 and the first flange portion 212b are welded over the entire circumference. At the other end edge of the inner ring 211, the inner ring 211 and the second flange portion 212c are welded over the entire circumference.

[0063] In the present embodiment, in order to blow out a cleaning liquid or the like at a high pressure, if a gap is formed between the first flange portion 212b and the inner ring 211 or between the second flange portion 212c and the inner ring 211, there is a risk that the cleaning liquid will enter that part. Therefore, it is preferable that both the welding between the first flange portion and the inner ring and the welding between the second flange portion and the inner ring are back welding. That is, a back wave in which they are melted together is formed so that the boundary line between the first flange portion 212b and the inner ring 211 and the boundary line between the second flange portion and the inner ring 211 do not clearly appear at the location facing the space portion 210a, thereby reducing the risk that the cleaning liquid will remain inside the main body portion 210 even when the cleaning liquid is supplied to the space portion 210a at a high pressure.

[0064] The main body portion 210 of the present embodiment is interposed between a member (external piping PX of the device) and another member (piping 11a of the device), and is used in such a form that the upper surface 210s3 and the lower surface 210s4 are each abutted against those members directly or via a gasket or the like. Therefore, each of the upper surface 210s3 and the lower surface 210s4 is preferably flat and smooth in terms of being easily able to exhibit sealing performance.

[0065] The main body 210 of this embodiment includes, as constituent members, an inner ring 211 and an outer ring 212. When the main body 210 is a joined body of multiple constituent members as in this embodiment, it is preferable that the inner ring 211 and the outer ring 212 are joined together so that no boundary line is formed between the upper surface 210s3 and the lower surface 210s4. This allows the upper surface 210s3 and the lower surface 210s4 to exhibit good sealing properties without requiring surface treatment after joining (welding) the inner ring 211 and the outer ring 212. That is, the main body 210 of this embodiment is configured so that the upper surface 210s3 becomes the uppermost surface and the lower surface 210s4 becomes the lowermost surface when the central axis 210c is extended in the vertical direction, the uppermost surface faces one of the two members sandwiching the main body 210, and the lowermost surface faces the other of the two members, the main body 210 is a joined body of multiple components, and the multiple components are joined so that the boundary between the components is not located on either the uppermost surface or the lowermost surface. Therefore, the main body 210 of this embodiment can exhibit good sealing properties when interposed between components.

[0066] As described above, supplying a cleaning liquid to the main body 210 and spraying the cleaning liquid from the through-holes 210h to perform cleaning, and then supplying a gas to the main body 210 and using the gas to remove droplets of the cleaning liquid adhering to the inner wall surface of the external piping PX, is also effective for discharging the cleaning liquid remaining inside the main body 210. Furthermore, the supply of gas to the main body after supplying the cleaning liquid may be for the purpose of discharging the cleaning liquid from the main body 210, rather than for the purpose of removing droplets adhering to the object to be cleaned. In this latter case, the supply pressure of the gas to the main body 210 may be lower than the supply pressure of the cleaning liquid.

[0067] From the viewpoint of preventing the cleaning liquid from remaining in the main body portion 210, a drain hole 210h3 serving as a third through hole may be provided in the main body portion 210. While the first through hole 210h1 and the second through hole 210h2 are opened to blow out the cleaning liquid toward the external piping PX (upper side), the drain hole 210h3 may be opened to blow out the cleaning liquid toward the opposite side (apparatus piping 11a side (lower side)) from the first through hole 210h1 and the second through hole 210h2 or in the horizontal direction.

[0068] The drain hole 210h3 is provided so that its height from the lower surface 210s4 when the main body 210 is in a horizontal position is lower than that of the first through hole 210h1 and the second through hole 210h2. The drain hole 210h3 in this embodiment is provided at the lowest position among the plurality of through holes 210h. The cleaning ring 20 in this embodiment is arranged in an inclined position in the reaction device 1, which is the device with cleaning function in this embodiment, and is arranged so that the drain hole 210h3 is at the lowest position among the plurality of through holes.

[0069] As described above, the first through-hole 210h1 and the second through-hole 210h2 are provided in the center of the inner ring 211 in the height direction. More specifically, the first through-hole 210h1 and the second through-hole 210h2 open at a position that is the midpoint in the height direction from the upper end to the lower end of the space 210a when the main body 210 is in a horizontal position. The first through-hole 210h1 and the second through-hole 210h2 are provided so that the cleaning liquid filling the space 210a from the lower end to the upper end can be discharged from the upper end to the midpoint. On the other hand, the drain hole 210h3 is provided so that at least a portion of the cleaning liquid below the midpoint can be discharged. The cleaning ring 20 of this embodiment, in which the cleaning liquid below the midpoint of the space 210a is discharged through the drain hole 210h3, can reduce the amount of cleaning liquid remaining in the main body 210 after cleaning. The drain hole 210h3 is preferably provided so that the height of the remaining cleaning liquid from the bottom end is 1 / 2 or less, and more preferably 1 / 3 or less, to the midpoint in a horizontal position.

[0070] The drain hole 210h3 is preferably provided at a corner where the bottom surface 210i4, which defines the lower edge of the space 210a, intersects with the inner circumferential surface 210i1, which defines the inner circumferential edge of the space 210a, when the main body 210 is arranged so that the first direction D1 is vertical. In this embodiment, the bottom surface 210i4 is inclined downward inward in the radial direction D2, so that the cleaning liquid is easily discharged from the drain hole 210h3 and the remaining cleaning liquid can be suppressed. As a result, in this embodiment, substantially all of the cleaning liquid can be discharged to the lower end of the space 210a.

[0071] In the embodiment illustrated above, the entire bottom surface 210i4 is a tapered surface TPL as shown in FIG. 7A. However, the tapered surface TPL may be a portion of the bottom surface 210i4 to achieve the above-described effect. More specifically, the bottom surface 210i4 may be composed of a tapered surface TPL and a horizontal surface HPL as shown in FIGS. 7B and 7C. If the area adjacent to the drain hole 210h3 is a horizontal surface HPL rather than a tapered surface TPL as shown in FIG. 7B, when the device is tilted as shown in FIG. 7D, the horizontal surface HPL will be tilted upward toward the drain hole 210h3, resulting in a depression at the boundary between the tapered surface TPL and the horizontal surface HPL, which may allow a small amount of cleaning liquid to accumulate. Therefore, as shown in FIGS. 7A and 7C, the tapered surface TPL is preferably provided so as to reach the inner ring 211, and preferably so as to reach the lower end of the inner circumferential surface 210i1. That is, it is preferable that the inner edge of the tapered surface TPL in the radial direction D2 reaches the opening position of the drain hole 210h3.

[0072] The drain hole 210h3 may be disposed at the end of the tapered surface TPL in the radially inward direction of the main body 210 and may be disposed so as to open to the end of the tapered surface TPL. In this case, the drain hole 210h3 will be disposed at the lower end of the space 210a even if a horizontal surface HPL is disposed radially inward of the tapered surface TPL, or conversely, an inverse tapered surface that slopes upward toward the radially inward direction is disposed. For example, in the main body 210 shown in FIG. 7B , the end of the tapered surface TPL on the radially inner side is the boundary between the tapered surface TPL and the horizontal surface HPL. In this case, instead of locating the drain hole 210h3 at the position shown in FIG. 7B , the drain hole 210h3 may be disposed at this boundary. Furthermore, a drain hole 210h3 disposed in such a position will be located at the lower end of the space 210a even in an inclined arrangement as shown in FIG. 7D , and will effectively function to drain a larger amount of cleaning liquid.

[0073] When the main body 210 is in a horizontal position and the cross-sectional area of ​​the space 210a is assumed to be a cross-sectional area when the main body 210 is cut in a horizontal plane, the tapered surface TPL reduces the cross-sectional area toward the drain hole 210h3. In other words, when the main body 210 is cut in a vertical plane (a plane perpendicular to the circumferential direction R) including the central axis 11ac, the cross-sectional shape of the space 210a tapers toward the lower end of the space 210a. In this embodiment, the drain hole is provided at the narrowest point of the cross-sectional shape tapering toward the lower end. When comparing the volume of the space 210a from the lower end to the same height, the volume is smaller than when the cross-sectional area is constant and does not decrease. Therefore, by providing the tapered surface TPL, the volume of the cleaning liquid remaining in the space 210a decreases significantly as the liquid level drops, and more of the cleaning liquid is discharged through the drain hole 210h3.

[0074] In this embodiment, the device pipe 11a to which the main body 210 is attached is disposed such that its central axis 11ac extends vertically at an angle relative to the vertical direction. Therefore, the main body 210 is attached to the end of the device pipe 11a with its central axis 210c also tilted relative to the vertical direction. When the main body 210 is attached to the end of the device pipe 11a, one end of the main body 210 is raised higher than the other end, placing the main body 210 in an inclined position. In this position, the one end is raised higher than in the horizontal position, resulting in a larger downward angle of the bottom surface 210i4. On the other hand, the other end has a shallower downward angle of the bottom surface 210i4. Therefore, it is preferable that the first angle θ1 at which the bottom surface 210i4 is inclined relative to the horizontal plane HP exceeds the second angle θ2 at which the central axis 210c is inclined relative to the vertical direction in the inclined position. This allows the bottom surface 210i4 to maintain a downward-sloping state even at the lowest point of the space 210a. The drain hole 210h3 is preferably provided at this lowest point. That is, when the cleaning ring 20 is used with the main body 210 in an inclined position, it is preferable that the drain hole 210h3 be open at the lowest point of the space 210a.

[0075] The drain hole 210h3 may have the same diameter as the first through hole 210h1 and the second through hole 210h2, or may be smaller or larger than them. The drain hole 210h3 does not need to be provided singly; multiple drain holes 210h3 may be provided. The drain hole 210h3 may be used to clean the device piping 11a. That is, in the cleaning ring 20 of this embodiment, the drain hole 210h3 may be provided so that cleaning liquid is discharged obliquely downward when the main body 210 is horizontally disposed. The cleaning liquid discharged from the drain hole 210h3 may hit the wall surface of the device piping 11a, thereby providing excellent cleaning effect not only on the external piping PX but also on the device piping 11a. In this case, the direction in which the cleaning liquid is discharged from the drain hole 210h3 may be radially inward as viewed in the first direction, similar to the first through hole 210h1, or may be inclined relative to the radial direction, similar to the second through hole 210h2.

[0076] The diameter of each of the first through hole 210h1, the second through hole 210h2, and the drain hole 210h3 when viewed in the direction in which they penetrate can be, for example, 0.5 mm or more. The diameter may be 1 mm or more. The diameter may be 5 mm or less. The diameter may be 4 mm or less.

[0077] In this embodiment, the plurality of first through holes 210h1 and the plurality of second through holes 210h2 do not need to have the same hole diameter and may have different hole diameters. Furthermore, the examples in this embodiment are merely restrictive, and the present invention is not limited to the above examples. In this embodiment, the inner ring 211 and the outer ring 212 are welded together. However, in the cleaning ring 20 of this embodiment, the inner ring 211 and the outer ring 212 do not need to be welded together, and may be fixed together by screws or the like. For example, the inner ring 211 may have a screw thread on the outer peripheral surface thereof, and the first flange portion 212b and the second flange portion 212c of the outer ring 212 may also have screw threads on their tip surfaces, so that the inner ring 211 and the outer ring 212 are screwed together to fix them together.

[0078] When the inner ring 211 and the outer ring 212 are screwed together as described above, the inner ring 211 becomes rotatable relative to the outer ring 212, allowing for fine adjustment of the position where the cleaning fluid hits the object to be cleaned. Furthermore, if the inner ring 211 is detachable from the outer ring 212, it becomes possible to replace the inner ring 211 with another inner ring having a different size or number of through holes depending on the object to be cleaned.

[0079] In this embodiment, the inner wall surface of the pipe is the object to be cleaned, but for example, the main body 210 can be attached to the end of the second cylindrical portion 11b and used to clean the rotating shaft 31, or attached to the end of the third cylindrical portion 11c and used to clean the baffle 40.

[0080] In this embodiment, a sight glass is installed on the top of the main body 210 to allow the inside of the device to be viewed from outside the device, and the cleaning ring 20 can be used to clean the sight glass. Furthermore, if an instrument such as a pressure gauge is installed above the main body 210, the cleaning ring 20 can also be used to clean the instrument. In this embodiment, the cleaning ring 20 has a first through hole 210h1 from which the fluid blows out toward the central axis when viewed in the first direction, and a second through hole 210h2 that is inclined with respect to the direction toward the central axis. Therefore, the fluid blowing out from the second through hole 210h2 can clean the side surfaces of the piping and joints with other components (such as gaskets), while also effectively cleaning the instruments and sight glass installed in the center.

[0081] The cleaning ring 20 of this embodiment may be attached to each of the second cylindrical portion 11b and the third cylindrical portion 11c, as shown in Fig. 8. The cleaning ring 20 may be interposed between the cover 15 and the device piping 11a when the cover 15 is attached to the device piping 11a, which is the first cylindrical portion, instead of the external piping PX. In the embodiment illustrated in Fig. 8, a first cover 15a attached to the device piping 11a via the cleaning ring 20 (main body 210), a second cover 15b attached to the second cylindrical portion 11b via the cleaning ring 20 (main body 210), and a third cover 15c attached to the third cylindrical portion 11c via the cleaning ring 20 (main body 210) are provided.

[0082] The first lid body 15a includes a circular plate-shaped lid body 151 having an opening for visually observing the inside of the reaction tank 10 through the lid body 15a, and a sight glass 152 covering the opening of the lid body 151. The lid body 151 may be made of a metal plate with a glass lining on at least the surface facing the storage space 10c. The shape and position of the opening in which the sight glass 152 is provided are not particularly limited. In this embodiment, the opening is circular and provided in the center of the lid body 151. The glass plate of the sight glass 152 is provided so as to cover the opening from the outside of the lid body 151. Therefore, when the first lid body 15a is viewed from the storage space 10c side, the glass plate is attached to the lid body 151 so as to form a recess recessed from the inner surface of the lid body 151.

[0083] 9 and 10 , when the main body 210 is disposed in a horizontal position so that the first direction D1 is a vertical direction, a cylindrical surface including a radially inner surface of the main body 210 and a surface extending upward from the radially inner surface is defined as a virtual plane VP, a virtual line extending from the first through hole 210h1 in the blowing direction of the fluid is defined as a first virtual line VL1, and a virtual line extending from the second through hole 210h2 in the blowing direction of the fluid is defined as a second virtual line VL2, in this embodiment, the first virtual line VL1 and the second virtual line VL2 have different arrival positions and incident directions on the virtual plane VP.

[0084] In this embodiment, the imaginary plane VP is flush with the inner surface of the external piping PX and the radially inner surface of the main body 210. Fig. 10 is a diagram showing a state in which the imaginary plane VP is vertically cut along a perpendicular line passing through a point in the circumferential direction R, and the cylindrical imaginary plane VP is developed so as to be flat, and schematically shows each through hole, an intersection between a first imaginary line VL1 and the imaginary plane VP (hereinafter referred to as a "first intersection XP1"), an intersection between a second imaginary line VL2 and the imaginary plane VP (hereinafter referred to as a "second intersection XP2"), the flow direction of the cleaning liquid that has reached the imaginary plane VP (such as the external piping PX), etc.

[0085] In this embodiment, four first through-holes 210h1 that spray cleaning liquid in the direction of the central axis 210c are provided at equal intervals in the circumferential direction R, and therefore the cleaning liquid sprayed out from the first through-holes 210h1 reaches the first intersection XP1 located above the first through-holes 210h1 located on the opposite side of the central axis 210c, and then moves upward along the inner wall surface of the external piping PX due to the momentum of the cleaning liquid. As the cleaning liquid moves upward, it spreads out laterally, and the momentum of its upward movement weakens due to the effect of gravity, and finally forms a flow that is wider in the circumferential direction R than the first intersection XP1, and falls along the inner wall surface of the external piping PX.

[0086] The second through holes 210h2 are similar to the first through holes 210h1 in that they are multiple through holes equally spaced in the circumferential direction R, but the second through holes 210h2 are also arranged to discharge the cleaning liquid at an angle relative to the direction of the central axis 210c. That is, the second through holes 210h2 are arranged in the main body 210 so that the second imaginary line VL2 intersects the imaginary plane VP at an angle when viewed in the first direction D1. In this embodiment, the cleaning liquid discharged from the second through holes 210h2 moves along the inner wall surface of the external piping PX upon reaching the second intersection point XP2, as shown in FIG. 10 . At this time, the cleaning liquid moves primarily in the circumferential direction R, although it also moves upward. The cleaning liquid discharged from each of the multiple second through holes 210h2 forms a swirling flow that moves circumferentially along the inner wall surface of the external piping PX.

[0087] In this embodiment, the first through-hole 210h1 and the second through-hole 210h2 are provided in the main body 210 so that the first intersection XP1, which is the intersection of the first virtual line VL1 and the virtual plane VP, is located higher than the second intersection XP2, which is the intersection of the second virtual line VL2 and the virtual plane VP. Therefore, in this embodiment, the cleaning range can be made wider. The difference (Dxp (mm)) between the position of the first intersection XP1 and the position of the second intersection XP2 in the first direction D1 can be, for example, 5 mm or more. The difference may be 10 mm or more, or 15 mm or more. The difference can be, for example, 100 mm or less. The difference may be 80 mm or less, 70 mm or less, 60 mm or less, or 50 mm or less.

[0088] The areas between the main body 210 and the external piping PX and between the main body 210 and the cover 15 are difficult to clean thoroughly and tend to accumulate materials that should be removed by cleaning. Therefore, it is preferable that the first through hole and the second through hole 210h2 are arranged so that the first intersection XP1 or the second intersection XP2 is located at the upper end of the main body 210, and it is even more preferable that the second through hole is arranged so that the second intersection XP2 is located at the upper end of the main body 210.

[0089] In this embodiment, the first through-hole 210h1 may also be configured so that the first virtual line VL1 intersects the virtual plane VP obliquely when viewed in the first direction D1, so that a swirling flow of the cleaning liquid blown out from the first through-hole 210h1 is formed above the swirling flow of the cleaning liquid blown out from the second through-hole 210h2. This not only enables wide-area cleaning, but also results in the swirling flows strengthening each other, resulting in a high cleaning effect.

[0090] When a swirling flow is formed by the cleaning liquid discharged from the first through-hole 210h1, the first virtual line VL1, when projected onto a plane passing through the first intersection point XP1, results in a diagonal line inclined both vertically and horizontally. When the diagonal line is decomposed into a vector in the vertical direction (first direction D1) and a vector in the horizontal direction, the magnitude of the vertical vector represents the magnitude of the kinetic energy of the cleaning liquid rising along the wall surface. Meanwhile, the magnitude of the vector in the horizontal direction represents the magnitude of the kinetic energy of the cleaning liquid moving in the circumferential direction R. To form a favorable swirling flow, the elevation angle of the diagonal line can be, for example, 10 degrees or more. The elevation angle may be, for example, 15 degrees or more, 20 degrees or more, or 25 degrees or more. The elevation angle can be, for example, 60 degrees or less. The elevation angle may be, for example, 50 degrees or less, 45 degrees or less, or 40 degrees or less.

[0091] The above-mentioned preferable elevation angle also applies to the oblique line obtained by projecting the second virtual line VL2 onto the plane passing through the second intersection point XP2.

[0092] When the first lid body 15a having the above-described sight glass 152 is used as the component onto which the cleaning liquid is sprayed, for example, the cleaning liquid sprayed from the first through hole 210h1 can be directed onto the sight glass 152 to clean a glass plate, and the cleaning liquid sprayed from the second through hole 210h2 can be directed onto the lid body 151 to clean a glass-lined metal plate.

[0093] At this time, if necessary, the size of the first through hole 210h1 (the area of ​​the cross section perpendicular to the flow direction) may be made larger than that of the second through hole 210h2 to increase the amount of cleaning liquid supplied per unit time for cleaning the glass sheet. Conversely, the size of the first through hole 210h1 may be made smaller than that of the second through hole 210h2 to increase the flow rate of the cleaning liquid blown out from the first through hole 210h1 and improve the impact force on the glass sheet.

[0094] In this embodiment, the opening shapes of the first through-hole 210h1 and the second through-hole 210h2 may be adjusted so that the cleaning liquid spreads more horizontally than vertically when it is sprayed out, thereby forming a wide stream of cleaning liquid toward the sight glass 152 and the lid main body 151. Conversely, the opening shapes of the first through-hole 210h1 and the second through-hole 210h2 may be adjusted so that the cleaning liquid spreads more vertically when it is sprayed out, thereby allowing the cleaning liquid to be supplied intensively to a specific location on the sight glass 152 or the lid main body 151.

[0095] The fact that the cleaning liquid spreads horizontally can be confirmed by, when the main body 210 is placed horizontally so that the first direction D1 is vertical, and water is sprayed from each through-hole, and the shape of the sprayed water in the air is larger in the horizontal direction than in the vertical direction. The fact that the cleaning liquid spreads vertically can be confirmed by, when the main body 210 is placed horizontally so that the first direction D1 is vertical, and water is sprayed from each through-hole, and the shape of the sprayed water in the air is larger in the vertical direction than in the horizontal direction. More specifically, the fact that the cleaning liquid spreads horizontally or vertically can be confirmed by observing the cross-sectional shape of the cleaning liquid a predetermined time after it is sprayed from the through-hole. For example, this can be confirmed by measuring the shape of the cleaning liquid using a non-contact shape measuring device using laser light or the like, and observing the cross-sectional shape in a plane perpendicular to the spray direction at a point a predetermined distance (e.g., 20 mm) from the through-hole in the spray direction of the cleaning liquid.

[0096] In this embodiment, multiple types of through holes, namely the first through hole 210h1 and the second through hole 210h2, are provided, which enables appropriate cleaning according to the object to be cleaned, and this is true not only for the first cylindrical portion (device piping 11a) on which the first lid body 15a is provided, but also for the second cylindrical portion 11b and the third cylindrical portion 11c.

[0097] The second cylindrical portion 11b has a main body 210 of the cleaning ring 20 attached to its upper portion, and a second lid body 15b having a circular plate-shaped lid body with an opening through which the rotating shaft 31 of the agitator 30 can be inserted is attached further above the main body 210. In the main body 210 attached to the second cylindrical portion 11b, for example, the cleaning material ejected from the first through-hole 210h1 may be directed toward the rotating shaft 31 to mainly clean the rotating shaft 31, and the cleaning liquid ejected from the second through-hole 210h2 may be directed toward the underside of the second lid body 15b to mainly clean the second lid body 15b. In this case, the second through-hole 210h2 may be provided so that a swirling flow that circulates around the rotating shaft 31 is formed on the underside of the second lid body 15b. The second through-hole 210h2 may be provided so that the sprayed cleaning liquid forms a swirling flow on the lower surface of the second lid 15b, reaches the rotating shaft 31, and flows downward along the rotating shaft 31. In this case, it is possible to reduce the need for the cleaning liquid sprayed from the first through-hole 210h1 to reach the upper end of the rotating shaft 31 in the reaction tank (a position corresponding to the lower surface of the second lid 15b).

[0098] The first through-hole 210h1 may have a shape that causes the cleaning liquid to spread more widely in the left-right direction than in the up-down direction so that the cleaning liquid more reliably hits the rotating shaft 31. In this case, the first through-hole 210h1 may be provided so that part of the sprayed cleaning liquid hits the rotating shaft 31 and the remaining cleaning liquid hits the second lid 15b. Furthermore, the first through-hole 210h1 may have a shape that causes the cleaning liquid to spread more widely in the up-down direction than in the left-right direction so that more cleaning liquid is effectively used to clean the rotating shaft 31.

[0099] The cleaning of the rotating shaft 31 may be performed while rotating the rotating shaft 31. In this case, the rotation direction of the rotating shaft 31 may be the same direction as the swirling flow formed on the lower surface of the second cover 15b. The rotation direction of the rotating shaft 31 may be opposite to the swirling flow formed on the lower surface of the second cover 15b.

[0100] The main body 210 of the cleaning ring 20 is attached to the upper part of the third cylindrical part 11c, and further above the main body 210, the third lid 15c for supporting the baffle 40 by suspending it is attached.

[0101] In the main body 210 attached to the third cylindrical portion 11c, for example, the cleaning material sprayed from the first through-hole 210h1 may be directed against the baffle 40 to primarily clean the baffle 40, and the cleaning liquid sprayed from the second through-hole 210h2 may be directed against the underside of the third lid 15c to primarily clean the third lid 15c. In this case, the second through-hole 210h2 may be provided so that a swirling flow that circulates around the baffle 40 is formed on the underside of the third lid 15c. The second through-hole 210h2 may be provided so that the sprayed cleaning liquid forms a swirling flow on the underside of the third lid 15c, reaches the baffle 40, and then flows downward along the baffle 40. In this case, it is possible to reduce the need for the cleaning liquid sprayed from the first through-hole 210h1 to reach the upper end of the baffle 40.

[0102] As described above, in this embodiment, by providing multiple types of through holes, it is possible to easily clean various objects. In the above example, the first through hole 210h1 and the second through hole 210h2 have different angles from which the fluid is blown out, but as shown in Fig. 11, the first through hole 210h1 and the second through hole 210h2 may have the same angle from which the fluid is blown out and only differ in the size of the hole.

[0103] The size of the first through-hole 210h1 and the second through-hole 210h2 can be compared by calculating the cross-sectional area of ​​each through-hole in a plane perpendicular to the flow path. S (mm2 )) for the size of the larger through hole (cross-sectional area: S L (mm 2 )) ratio (S L / S S ) can be, for example, 1.1 times or more. The ratio may be 1.5 times or more, 2 times or more, or 3 times or more. The ratio can be, for example, 16 times or less. The ratio may be 12 times or less, or 8 times or less.

[0104] In this embodiment, the first through hole 210h1 and the second through hole 210h2 are formed at the same height from the lower surface 210s4 of the main body portion 210 in a horizontal position. However, the first through hole 210h1 and the second through hole 210h2 may be formed at different positions. The positions of the first through hole 210h1 and the second through hole 210h2 in the first direction D1 can be compared by determining the center positions of their openings on the inner peripheral surface 210s1 of the main body portion 210. The difference (Dh (mm)) between the center positions of the lower through hole and the higher through hole in the first direction D1 can be, for example, 1 mm or more. The difference may be 2 mm or more, or 3 mm or more. The difference may be, for example, 50 mm or less. The difference may be 40 mm or less, or 30 mm or less.

[0105] As described above, the above includes the following disclosures.

[0106] (1) A cleaning ring used to spray a fluid onto a component to clean the component, a hollow ring-shaped main body portion having a space portion therein that serves as a flow path for the fluid; a through-hole communicating with the space and configured to blow out the fluid supplied to the space is provided on the radially inner side of the main body; The cleaning ring has a main body made of metal.

[0107] (2) a first direction in which a central axis of the main body extends; The main body portion is provided with a plurality of the through holes, The plurality of through holes include a first through hole in which the fluid is blown out in a direction toward the central axis when viewed in a first direction along the first direction, and a second through hole in which the fluid is blown out in a direction inclined with respect to the direction toward the central axis.

[0108] (3) The second through hole is provided as one or more holes, A cleaning ring as described in (2), wherein at least one of the second through holes is arranged so that a straight line extending from the second through hole in the direction in which the fluid is blown out does not intersect with a straight line extending from another through hole in the direction in which the fluid is blown out.

[0109] (4) Each of the first through hole and the second through hole is When the main body is disposed so that the first direction is a vertical direction, the blowing direction of the fluid is obliquely upward, The cleaning ring according to (2) or (3) is used to clean the member disposed above the main body portion.

[0110] (5) the main body portion includes an inner ring provided with the through hole and an outer ring disposed radially outward of the inner ring, the inner ring is cylindrical; The outer ring is a cylindrical outer peripheral wall portion disposed so as to surround the inner ring; a first flange portion extending radially inward from one axial end of the outer peripheral wall portion; a second flange portion extending radially inward from the other end of the outer peripheral wall portion, The outer peripheral wall portion, the first flange portion, and the second flange portion are arranged so that a cross-sectional shape in a plane perpendicular to the circumferential direction is U-shaped, The cleaning ring according to any one of (1) to (4), wherein the radially inner edge portions of the first flange portion and the second flange portion are welded to the inner ring.

[0111] (6) a first direction in which a central axis of the main body extends; the fluid that is blown out of the through hole through the space is a liquid, A cleaning ring as described in any one of (1) to (5), wherein the inner surface of the main body portion that defines the space portion has a tapered surface that slopes downward radially inward at the portion that becomes the bottom surface when the main body portion is positioned so that the first direction is vertical.

[0112] (7) The cleaning ring according to (6), further comprising a drain hole for discharging the liquid from the lower portion of the space.

[0113] (8) The main body is used in an inclined position in which the first direction is inclined with respect to a vertical direction, an angle of the tapered surface with respect to a horizontal plane in a horizontal position in which the first direction is a vertical direction is defined as a first angle; When the angle at which the first direction is tilted with respect to the vertical direction in the inclined posture is defined as a second angle, The cleaning ring according to (6) or (7), wherein the first angle is greater than the second angle.

[0114] (9) The cleaning ring according to any one of (1) to (8) is used so that the pressure of the fluid supplied to the main body is 100 kPa or more in gauge pressure.

[0115] (Other embodiments) Below, we will explain an embodiment different from the cleaning ring 20 exemplified above. In the cleaning ring 20 exemplified above, the main body 210 is made of two components, the inner ring 211 and the outer ring 212, joined together, which makes it easy to form a shape suited to the application. However, the ease of processing into a desired shape is an effect that is commonly achieved when the main body 210 is formed from multiple components. For example, the main body 210' shown in FIG. 12A has four components as shown in FIG. 12B. A cleaning ring 20' having such a main body 210' can also be easily formed into a shape suited to the application, similar to the cleaning ring 20 exemplified in FIG. 3, etc.

[0116] 12A and 12B is common to the cleaning ring 20 illustrated in Figure 3 etc. in that it has a pipe 220' for supplying fluid to the main body 210'. Also, although not shown, the cleaning ring 20' illustrated in Figures 12A and 12B has a flange portion at the end of the pipe 220' opposite the main body 210', similar to the cleaning ring 20 illustrated in Figure 3 etc.

[0117] The cleaning ring 20′ shown in FIGS. 12A and 12B is a cleaning ring used to spray a fluid against a component to clean the component, and includes a hollow ring-shaped main body 210′ ​​having a space 210a′ therein that serves as a flow path for the fluid, and a through hole 210h′ that communicates with the space 210a′ and is provided radially inside the main body 210′, for blowing out the fluid supplied to the space 210a′, and includes a cylindrical inner ring 211′ that forms the inner part of the main body 210′, and an outer ring 212′ that is provided radially outside the inner ring 211′, and the through hole 210h′ is provided in the inner ring 211′, and a fluid supply port 210b′ that supplies the fluid to the space 210a′.

[0118] In the cleaning ring 20 illustrated in Figure 3 and elsewhere, the cross section of the outer ring 212 in a plane perpendicular to the circumferential direction is U-shaped, whereas the outer ring 212' in the cleaning ring 20' illustrated in Figures 12A and 12B is cylindrical and extends a short distance in the first direction D1, similar to the inner ring 211'. In the cleaning ring 20 illustrated in Figure 3, the outer ring 212 is provided with two flanges: a first flange 212b that forms the upper surface 210s3 of the main body 210, and a second flange 212c that forms the lower surface 210s4. However, the outer ring 212' in the cleaning ring 20' illustrated in Figures 12A and 12B does not have flanges, but instead has two annular plates that correspond to the flanges. That is, the outer ring 212' of the cleaning ring 20' shown in FIGS. 12A and 12B is provided with only the outer peripheral wall portion 212a of the outer ring 212 illustrated in FIG.

[0119] The dimensions of the outer ring 212′ in the first direction D1 are equal to those of the inner ring 211′, and the inner diameter of the outer ring 212′ is larger than the outer diameter of the inner ring 211′. Of the two annular plates, the annular plate corresponding to the first flange 212b (hereinafter also referred to as the “first annular plate 213′”) is provided to cover the space from above when the inner ring 211′ and the outer ring 212′ are arranged concentrically as viewed in the first direction, forming a doughnut-shaped space between them. Therefore, the outer diameter of the first annular plate 213′ is larger than the inner diameter of the outer ring 212′, and in this embodiment, is larger than the outer diameter of the outer ring 212′. Furthermore, the inner diameter of the first annular plate 213′ is smaller than the outer diameter of the inner ring 211′, and in this embodiment, is smaller than the inner diameter of the inner ring 211′. The annular plate corresponding to the second flange portion 212c (hereinafter also referred to as "second annular plate 214'") has a similar shape.

[0120] One of the two surfaces of the first annular plate 213' constitutes an upper surface 210s3' of the main body 210', and the other surface constitutes a ceiling surface 210i3' that defines the upper edge of the space 210a'. One of the two surfaces of the second annular plate 214' constitutes a lower surface 210s4' of the main body 210', and the other surface constitutes a bottom surface 210i4' that defines the lower edge of the space 210a'. The inner circumferential surface 210i1' and the outer circumferential surface 210i2' of the space 210a' are formed by an inner ring 211' and an outer ring 212', respectively, as in the embodiment illustrated in FIG. 3.

[0121] An upper surface 210s3' of the main body portion 210' is formed by only one surface of the first annular plate 213', and the joint surfaces between the first annular plate 213' and the inner ring 211' and the joint surfaces between the first annular plate 213' and the outer ring 212' are provided on the opposite side of the one surface of the first annular plate 213'. A lower surface 210s4' of the main body portion 210' is formed by only one surface of the second annular plate 214', and the joint surfaces between the second annular plate 214' and the inner ring 211' and the joint surfaces between the second annular plate 214' and the outer ring 212' are provided on the opposite side of the one surface of the second annular plate 214'.

[0122] As described above, the cleaning ring 20' shown in Figures 12A and 12B is a cleaning ring that is used by being interposed between two members and that is used to spray a fluid onto at least one of the two members to clean that member, and is provided with a hollow ring-shaped main body 210' that has therein a space 210a' that serves as a flow path for the fluid, and on the radially inner side of the main body 210', a nozzle 210b that communicates with the space 210a' and that sprays the fluid supplied to the space 210a' is provided. The main body 210' has a first surface facing one of the two members and a second surface facing the other of the two members, and is configured so that when the central axis 210c' is extended in the vertical direction, the first surface becomes the uppermost surface and the second surface becomes the lowermost surface, and the main body 210 is an assembly of multiple constituent members, and the multiple constituent members are joined together so that the boundary between the members is not located on either the uppermost surface or the lowermost surface.

[0123] The cleaning ring 20' shown in Figures 12A and 12B has a main body 210' configured as described above, and therefore can exhibit good sealing properties without performing post-processing on the upper surface 210s3' or the lower surface 210s4'. To achieve this effect, the main body of the cleaning ring does not have to be made of metal. To achieve this effect, the main body may be made of resin or ceramic. Furthermore, the main body may be made of multiple materials selected from metal, resin, and ceramic.

[0124] Although detailed explanations will not be repeated in this specification, the above is merely an example, and the cleaning ring of the present invention can appropriately adopt conventionally known technical matters as long as the effects of the present invention are not significantly impaired. In other words, the present invention is not limited to the above example. [Explanation of symbols]

[0125] 1: Reactor: 10: Reactor tank, 110: Tank body, 15: Lid body, 20: cleaning ring, 210: main body, 210a: Space part, 210c: Central axis, 210h1: first through hole, 210h2: second through hole, 210h3: drain hole, 210i: Inner surface, 210i1: Inner surface, 210i2: Outer surface, 210i3: Ceiling surface, 210i4: Bottom surface, 210s: outer surface, 211: inner ring, 212: outer ring, D1: first direction, D2: radial direction, HP: horizontal plane, R: circumferential direction, TPL: Tapered surface

Claims

1. A cleaning ring used to spray a fluid onto a component to clean the component, a hollow ring-shaped main body portion having a space portion therein that serves as a flow path for the fluid; a through-hole communicating with the space and configured to blow out the fluid supplied to the space is provided on the radially inner side of the main body; The main body is made of metal, an inner ring provided with the through hole; and an outer ring disposed radially outward of the inner ring and abutting against the inner ring from the radially outer side, the inner ring is cylindrical; The outer ring is a cylindrical outer peripheral wall portion disposed so as to surround the inner ring; a first flange portion extending radially inward from one axial end of the outer peripheral wall portion; a second flange portion extending radially inward from the other end of the outer peripheral wall portion, the outer peripheral wall portion, the first flange portion, and the second flange portion are arranged so that a cross-sectional shape in a plane perpendicular to the circumferential direction is U-shaped, A cleaning ring in which radially inner edge portions of the first flange portion and the second flange portion are welded to the inner ring.

2. a first direction in which a central axis of the main body extends; The main body portion is provided with a plurality of the through holes, 2. The cleaning ring according to claim 1, wherein the plurality of through holes include a first through hole in which the fluid is blown out in a direction toward the central axis when viewed in a first direction along the first direction, and a second through hole in which the fluid is blown out in a direction inclined with respect to the direction toward the central axis.

3. One or more second through holes are provided, 3. The cleaning ring according to claim 2, wherein at least one of the second through holes is arranged so that a straight line extending from the second through hole in the direction in which the fluid is blown out does not intersect with a straight line extending from another of the through holes in the direction in which the fluid is blown out.

4. Each of the first through hole and the second through hole is When the main body is disposed so that the first direction is a vertical direction, the blowing direction of the fluid is obliquely upward, 4. The cleaning ring according to claim 2, which is used to clean the member disposed above the main body portion.

5. a first direction in which a central axis of the main body extends; the fluid that is blown out of the through hole through the space is a liquid, 2. The cleaning ring according to claim 1, wherein the inner surface of the main body portion defining the space portion has a tapered surface that slopes downward radially inward at a portion that becomes the bottom surface when the main body portion is positioned so that the first direction is vertical.

6. 6. The cleaning ring according to claim 5, further comprising a drain hole for discharging the liquid from the lower portion of the space.

7. the main body is used in an inclined position in which the first direction is inclined with respect to a vertical direction, an angle of the tapered surface with respect to a horizontal plane in a horizontal position in which the first direction is a vertical direction is defined as a first angle; When the angle at which the first direction is inclined with respect to the vertical direction in the front inclined posture is defined as a second angle, 7. A cleaning ring according to claim 5 or 6, wherein the first angle is used to exceed the second angle.

8. 2. The cleaning ring according to claim 1, wherein the pressure of the fluid supplied to the main body is 100 kPa or more in gauge pressure.

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