JP2017047493A - Centrifugal rotary granule storage tank and granule projection device to pipe inner surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a granule projection device to a pipe inner surface, the device that can be used under environment in which the action of gravity does not reach, projects grinding and cleaning materials toward the whole circumference of a pipe inner wall while moving along the pipe inner surface, and includes a recycling use function of the grinding and cleaning materials.SOLUTION: A granule projection device to a pipe inner surface includes a centrifugal rotary granule storage/granule supply tank, a centrifugal impeller unit and a pressure boundary partition unit. A centrifugal impeller unit of the granule is disposed in the upstream side of the pressure boundary partition unit, and the centrifugal rotary granule storage/granule supply tank is disposed in the area of the downstream side. The granules after the projection to the pipe inner wall by the action of the centrifugal impeller are collected and transferred to the granule tank by the flow of the medium fluid, and are stored once by the action of the centrifugal force. Successively, the granules are discharged from the granule tank and transferred to the centrifugal impeller by a screw conveyor, and are projected onto the pipe inner wall again. After that, the collection of the granules and projection motion are repeated.SELECTED DRAWING: Figure 1

Description

The present invention provides a multiphase fluid composed of a granular material and a medium fluid that are transferred from an upstream side through an inlet side pipe by the action of a pump in an environment where the action of gravity does not reach, for example, in an environment where centrifugal force acts. And then storing the granules, then removing a portion of the stored granules continuously and quantitatively, and then removing the removed granules again. The present invention relates to a centrifugal rotary type granule storage and granule supply tank having a function of forming a mixed phase fluid with a medium fluid and transferring it downstream through an outlet side pipe line.
The present invention also provides a mixed phase of particles and medium fluid transferred from an upstream side through an inlet side pipe by the action of a pump under an environment where gravity does not act, for example, under an environment where centrifugal force acts. The granules were separated from the fluid, and then subjected to centrifugal force applied to the granules and ejected at a high speed toward a region out of the flow path of the multiphase fluid, and then the granules were separated. The latter medium fluid relates to a centrifugal impeller unit of granular material such as an abrasive, which has a function of being transferred downstream through an outlet side pipe line.
A further object of the present invention is to provide a granular projection device for the inner surface of a pipe by combining the centrifugal rotary granular storage and granular supply tank described above and a centrifugal impeller unit of granular material such as the above-mentioned abrasive. In the particle projection device to the inner surface of the tube, the particles and medium transferred from the centrifugal rotary particle storage and particle supply tank to the centrifugal impeller unit of particles such as the abrasive In the centrifugal impeller unit, the multiphase fluid is separated into a granular material and a medium fluid, and then the granular material is subjected to a centrifugal force and injected toward the inner wall of the tube at a high speed, and then The medium fluid after the particles are separated is transferred to the downstream side of the pipe, while the particles after being ejected from the centrifugal impeller unit again become a mixed phase fluid with the medium fluid and are centrifugally rotated. It is transferred to the granule storage tank. And, the effect of gravity is provided with the functionality available under beyond environmental concerns granules projection device into the tube surface.

As this type of known technology, a centrifugal projection device described in Japanese Patent No. 3028148 is known.
Japanese Patent No. 3028148

In the conventional centrifugal projection apparatus except the centrifugal projection apparatus disclosed in Japanese Patent No. 3028148, the abrasive is supplied to the rotary impeller using the action of gravity, that is, natural fall. Therefore, depending on the installation position of the centrifugal projection device, it becomes impossible to supply the abrasive material by natural fall, and thus the installation position of the centrifugal projection device is greatly restricted.
Then, the main technical solution subject of the centrifugal projection apparatus disclosed by the patent 3028148 was to provide the centrifugal projection apparatus with few restrictions of an installation position. Another object of the present invention is to provide a centrifugal projection device that has no restriction on the installation position at least in a rotary impeller.
Another technical solution of the centrifugal projection device disclosed in Japanese Patent No. 3028148 is to separate the polishing material being sucked and transferred on the gas flow from the gas flow alone. The objective of the present invention is to provide a centrifugal projection device for supplying the abrasive after separation to a rotary impeller.
Further, another technical solution of the centrifugal projection device disclosed in Japanese Patent No. 3028148 is to collect the abrasive projected by the rotary impeller and to suck the collected abrasive. A small centrifugal projection device is used that separates the abrasive material that is being transported by suction and is transported by suction only from the gas flow, and re-feeds the separated abrasive material to the impeller. Was to provide.
In order to achieve the above technical solution, in the centrifugal projection device disclosed in Japanese Patent No. 3028148, the polishing material in the middle of being sucked and transferred on the flow of gas is the flow of only the polishing material. In a centrifugal projection device of a type that further separates and supplies the separated abrasive material to the rotary impeller, gravity is used as means for supplying the abrasive to the rotary impeller from the abrasive path immediately before the rotary impeller. Therefore, a centrifugal projection device provided with a rotary impeller without any restriction on the installation position is provided.
In order to achieve the above technical solution specifically, in the centrifugal projection device disclosed in Japanese Patent No. 3028148, a rotary impeller, an impeller case surrounding the impeller, and the impeller case In the centrifugal projection device comprising at least an outlet side suction pipe for sucking gas from the inside and an inlet side suction pipe for supplying the abrasive to the rotary impeller, the impeller case is projected by the rotary impeller. A narrow groove-shaped projection hole is provided in a portion through which the abrasive to be passed through, and the upstream side end of the outlet side suction pipe whose downstream side is connected to a suction device such as a vacuum blower is connected to the impeller case. In the inlet side suction pipe, the upstream end sucks the abrasive together with the gas, and the downstream end opens in the impeller case. Features a centrifugal projection device provided It was.
In order to achieve the above technical solution problem specifically, in the centrifugal projection device disclosed in Japanese Patent No. 3028148, according to the present invention, the above technical solution problem is specifically achieved. A rotary impeller, an impeller case surrounding the rotary impeller, an outlet side suction pipe for sucking gas from the inside of the impeller case, and an inlet side suction pipe for supplying a polishing material to the rotary impeller The rotary impeller includes a plurality of blades that are radially arranged around the rotary shaft of the rotary impeller and shaped so that the width of the blade decreases as the distance from the rotary shaft increases. The impeller case is provided with a narrow groove-shaped projection hole in a portion through which the abrasive material projected by the rotary impeller passes, and the impeller case has a downstream such as a vacuum blower. Connected to the suction device The upstream end of the mouth side suction pipe is open. In the inlet side suction pipe, the upstream end sucks the abrasive together with the gas, and the downstream end is the impeller case. There has been provided a centrifugal projection device characterized by being open in the interior.
In order to achieve the above-mentioned further technical problem, in the centrifugal projection device disclosed in Japanese Patent No. 3028148, a rotary impeller, an impeller case surrounding the rotary impeller, and the impeller case In the centrifugal projection device comprising at least an outlet side suction pipe for sucking gas from the inside and an inlet side suction pipe for supplying the abrasive to the rotary impeller, the impeller case is projected by the rotary impeller. A narrow groove-shaped projection hole is provided in a portion through which the abrasive to be passed through, and the upstream side end of the outlet side suction pipe whose downstream side is connected to a suction device such as a vacuum blower is connected to the impeller case. In the inlet side suction pipe, the upstream end sucks the abrasive together with the gas, and the downstream end opens in the impeller case. In the characteristic centrifugal projector The impeller case of the centrifugal projection device is mounted on a polishing cabinet whose direction of the surface to be cleaned is open, and the impeller case is mounted at a position where the polishing material is projected toward the opening of the polishing cabinet. In addition, there is provided a centrifugal projection device characterized in that an upstream end portion of an inlet side suction tube is connected in communication with the interior of the polishing cabinet.

However, the centrifugal projection apparatus disclosed in Japanese Patent No. 3028148 has the following problems to be solved.
In other words, in a centrifugal projection device that is used in an environment where the action of gravity does not reach, an abrasive that has a storage function for the abrasive material that can be used in an environment that does not reach the action of gravity and a quantitative supply function of the abrasive material. The scavenging material storage and polishing material supply tank is essential, but the above-mentioned essential requirements are not described in the centrifugal projection device disclosed in Japanese Patent No. 3028148. Moreover, it does not have the essential function. Further, the centrifugal projection device disclosed in Japanese Patent No. 3028148 cannot project the abrasive toward the entire circumference of the inner surface of the tube.

In order to achieve the above technical solution, the invention according to claim 1 is provided with a polishing material storage function and a polishing material quantitative supply function which can be used even in an environment where gravity does not act. To realize a polishing material storage and cleaning material supply tank;
The cylindrical container is configured to rotate; a screw conveyor is disposed inside the cylindrical container, and the central axis of the screw conveyor and the central axis of the cylindrical container are the same axis, The rotational speed of the rotating shaft of the screw conveyor and the rotational speed of the rotating shaft of the cylindrical container are configured to rotate at different rotational speeds; Two large and small tubes having the same axis formed in the shape are arranged, and the same axis formed in the shape of a double tube at a position facing the opening of the two large and small tubes The two large and small fixed pipes having a large and small diameter are arranged, and the two large and small pipes that rotate and the two large and small fixed pipes are connected via a rotary joint seal, that is, the two large and small fixed pipes are connected. The pipes inside and outside the cylindrical container The two pipes of the double pipe include an inlet-side pipe for allowing a mixed phase fluid of the particles and the medium fluid to flow into the cylindrical container, and a mixed phase of the particles and the medium fluid. It is composed of two types of pipelines, namely an outlet side pipeline that allows fluid to flow out of the cylindrical vessel; as described above, a rotating cylindrical vessel, a screw conveyor, an inlet side pipeline, and an outlet side pipeline In the centrifugal rotary type granule storage and granule supply tank, the mixed phase fluid of the granule and the medium fluid flowing into the inside of the cylindrical container from the inlet side pipe is a screw. The velocity of the multiphase fluid is attenuated by, for example, colliding with the screw blades of the conveyor, and the particles are separated from the medium fluid. The separated particles are pressed toward the outer periphery on the inner peripheral surface of the cylindrical container by the action of centrifugal force. Once stored, and then After the granules are transferred in the direction of the side of the cylindrical container in which the double pipe line is arranged by the action of the screw conveyor, from the grain discharge hole provided in the side of the cylindrical container, the outlet side The fluid is discharged into the pipe upstream of the pipe to form a multiphase fluid consisting of the granule and the medium fluid, and then flows into the inside of the cylindrical container from the inlet side pipe and is separated. The medium fluid flows through the inside of the cylindrical container, and then flows out of the cylindrical container from the outlet side pipe in a state where the particles are mixed again to form a mixed phase fluid;
A centrifugal rotating granule storage and granule supply tank is provided, which is configured as described above.

In order to achieve the above technical solution, the invention according to claim 3 can be used in an environment where the action of gravity does not reach, and the abrasive is applied to the entire circumference of the inner surface of the pipe. To realize a centrifugal projection device capable of projecting;
A rotating shaft, a first shaft member fixed to the rotating shaft, a second shaft member, a shaft space, a blade member, a blade surrounding member, a granule injection hole, and an inlet side pipe line In a centrifugal impeller unit of a granular material such as a polishing material, which is composed of at least a double pipe of an outlet side pipe; the rotary shaft, the first shaft core member, and the second shaft core member And each of the blade member, the blade surrounding member, and the granular material injection hole are configured to rotate about the same single axis as a central axis, and the first shaft core member The outer circumference circle and the inner circumference circle and the outer circumference circle of the second shaft core member are formed concentrically around the same single axis, while the shaft space and the inlet side The double pipe line of the pipe line and the outlet side pipe line does not rotate but is formed in a concentric cylinder shape with the same single axis as the central axis; the axial space is the first axial line A cylindrical space in a region sandwiched between the outer peripheral surface of the material and the inner peripheral surface of the second shaft core member; the end of the shaft core space is a double of the inlet side conduit and the outlet side conduit Facing the end of the double cylindrical space of the conduit, the facing portion being isolated from the space outside the centrifugal wheel unit and communicating as airtight as possible; A plurality of blade members extending radially from the outer peripheral surface and the blade surrounding member are fixed to the outer peripheral surface of the shaft core member, that is, the blade member and the blade surrounding member are integrally formed. The internal space of the radial cylindrical body is in communication with the axial space; only the granular material is captured and separated from the mixed phase fluid of the granular material and the medium fluid that flows through the flow path from the axial space to the outlet side pipe. Subsequently, a centrifugal force is applied to the captured particles by the blade member, so that a high speed is directed from the particle injection hole to the outside. In order to inject, the end of the blade member on the rotating shaft side is arranged in a state of extending in the rotating shaft direction for the purpose of effectively supplementing the particles in the axial space; Regarding the opening area of the body injection hole, based on the numerical value of the aperture area calculated based on the volume of the high-speed particle passing through the particle injection hole per unit time as the basic data, the opening area of the particle injection hole is Formed as small as possible;
There is provided a centrifugal impeller unit of a granular material such as an abrasive, which is configured as described above.

In order to achieve the above technical solution, in the invention according to claim 4, it can be used in an environment where the action of gravity does not reach, and the inner wall of the pipe is moved while moving along the pipe inner surface. The inner surface of the tube having a so-called abrasive recycling function that projects the abrasive toward the entire circumference, collects the projected abrasive, and projects it again toward the inner wall of the tube. To realize an abrasive projection device
The apparatus for projecting a granular material onto the inner surface of the tube includes a centrifugal rotary granular storage and granular supply tank according to claim 1 and a centrifugal blade of granular material such as an abrasive according to claim 3. And a granule projection device to the inner surface of the tube, the inner surface contact seal for the tube for dividing the inside of the tube into two regions, an upstream region having a high pressure and a downstream region having a low pressure. 4. A pressure boundary partition unit as a pressure boundary wall composed of a partition wall member is provided; in a region upstream of the pressure boundary partition unit, a centrifugal impeller of granular material such as an abrasive according to claim 3 The centrifugal rotary granule storage and granule supply tank according to claim 1 is arranged in an area downstream of the pressure boundary partition unit; and the pressure boundary For the partition unit, The shape of the outer shape of the pressure boundary partition unit viewed from the direction of the axis is similar to the shape of the inner surface of the tube, and a double pipe is airtight in the axial portion of the pressure boundary partition unit. The upstream side of the pipe line inside the double pipe line is connected to the inlet side pipe line of the centrifugal impeller unit, and the downstream side of the pipe line inside the double pipe line is the It communicates with the outlet side pipe of the centrifugal rotary type granule storage / granule supply tank, and the downstream side of the pipe outside the double pipe is the inlet of the centrifugal rotary type granule storage / granule supply tank. The end of the pipe that is in communication with the side pipe and upstream of the pipe outside the double pipe is open in the region upstream of the pressure boundary partition unit, ie the double pipe The upstream side of the outer pipe line and the upstream area of the pressure boundary partition unit The end of the centrifugal impeller unit on the downstream side of the outlet pipe is open in the region downstream of the pressure boundary partition unit, that is, the outlet pipe of the centrifugal impeller unit. And the downstream area of the pressure boundary partition unit are in communication with each other; in the granule projection device to the inner surface of the pipe, the pressure boundary partition unit is formed in the pipe. The medium fluid always flows from the upstream side to the downstream side with the boundary as the boundary, but the particles after being projected toward the inner wall of the tube become a multiphase fluid with the medium fluid and the double pipe of the pressure boundary partition unit Flow into the inside of the centrifugal rotary granule storage and granule supply tank, and then within the tank, the granules are separated from the medium fluid and the separated granules Is stored once on the inner peripheral surface of the tank by the action of centrifugal force, and then the granules are discharged in the direction of the side of the tank by the action of a screw conveyor and then discharged from the grain discharge holes, and Again, a mixed phase fluid of particles and medium fluid is formed, and then the mixed phase fluid passes through the conduit inside the double conduit of the pressure boundary partition unit to the inlet conduit of the centrifugal impeller unit. Next, after the particles are separated from the medium fluid in the axial space of the centrifugal impeller unit, centrifugal force is applied by the blade member and projected from the particle injection hole toward the inner wall of the tube at a high speed, On the other hand, the medium fluid after the particles are separated flows out to a region downstream of the pressure boundary partition unit, and thereafter, the motion of the multiphase fluid between the particles and the medium fluid described above is repeated;
There is provided a particle projection device for an inner surface of a tube, which is configured as described above.

The present invention provides the following effects.
Regarding the field of use of the apparatus of the present invention, the pipe structure in which the conventional centrifugal projection apparatus cannot perform the blasting operation because the blasting material cannot be supplied by natural fall depending on the installation position such as the installation angle of the pipe structure. For example, as an example of the pipe structure, a hydraulic iron pipe, a water supply pipe, a drain pipe, a gas pipe, or an oil plant pipe of a hydroelectric power plant has a horizontal part or an inclined part. There are various types of pipe structures such as vertical parts, but the apparatus of the present invention is used for polishing work for removing foreign matters such as rust and aquatic organisms attached to the inner surface of the pipe structures. Can be suitably applied.

Preferred embodiments of the apparatus constructed in accordance with the present invention will now be described in more detail with reference to the accompanying drawings.

A centrifugal rotating granule storage and granule supply tank 110 of a preferred embodiment according to claims 1 to 2 constructed in accordance with the present invention;
A rotating cylindrical container 111; a screw conveyor 114; a double pipe including an inlet side pipe and an outlet side pipe; a centrifugal constructed of a main frame 131, a centrifugally rotating granular tank drive motor 132, and a drive shaft 133 A rotating granule tank power unit 130;
The cylindrical container 111 has a double cylinder structure including an outer cylindrical container 1111 and an inner cylindrical container 1113.
The outer cylindrical container 1111 is fixed to the cylindrical container rotating shaft 112 at two cylindrical container bosses 1112.
The inner cylindrical container 1113 includes an inner cylindrical container inlet tube 1114, an inner cylindrical container outlet hole 1115, and a granule discharge hole 1116.
In addition, the shape of the granule discharge hole 1116 may be a long and narrow groove-like hole along the joint circle between the cylindrical member of the inner cylindrical container 1113 and the side plate member.
A cylindrical container inlet outer tube 1119 is connected to the inner cylindrical container inlet tube 1114, and a cylindrical container outlet inner tube 1118 is disposed inside the cylindrical container inlet outer tube 1119.
A space sandwiched between the cylindrical container inlet outer tube 1119 and the cylindrical container outlet inner tube 1118, that is, an inlet-side pipe line, communicates with a space inside the inner cylindrical container 1113.
The space sandwiched between the cylindrical container outlet inner pipe 1118 and the cylindrical container boss 1112, that is, the outlet side pipe line, includes a space sandwiched between the outer cylindrical container 1111 and the cylindrical container inlet outer pipe 1119, and four cylindrical container outlet radiating connection pipes. 1117 is communicated.
A ring-shaped inlet ring hole 1120 is formed in the annular end surface member on the upstream side of the inlet side pipe line.
A cylindrical container fixed double pipe 117 composed of a cylindrical container fixed inlet outer pipe 1171 and a cylindrical container fixed outlet inner pipe 1172 is disposed at a position facing the open end face of the cylindrical container inlet outer pipe 1119 and the cylindrical container outlet inner pipe 1118. The annular end face member on the downstream side of the non-rotating inlet side pipe line sandwiched between the cylindrical container fixed inlet outer pipe 1171 and the cylindrical container fixed outlet inner pipe 1172 includes a rotary joint outer seal 1161 and a rotary joint inner member. The rotary joint seal 116 made of the seal 1162 is fixed, and thus the non-rotating inlet side pipe line is communicated with the inner cylindrical container 1113, and the non-rotating outlet side inside the cylindrical container fixed outlet inner pipe 1172. The pipe line communicates with an annular narrow space sandwiched between the outer cylindrical container 1111 and the inner cylindrical container 1113. A member for connecting the outer cylindrical container 1111 and the inner cylindrical container 1113 is disposed in the annular space so as not to obstruct the flow path of the medium fluid. In addition, the non-rotating inlet-side pipe line sandwiched between the cylindrical container fixed inlet outer pipe 1171 and the cylindrical container fixed outlet inner pipe 1172 is connected to the cylindrical container fixed inlet outer pipe 1171 so as not to disturb the flow path of the medium fluid. A member for connecting the cylindrical container fixed outlet inner pipe 1172 is arranged.
A hollow screw shaft 1142 is arranged via a screw bearing 1143 at a portion of the cylindrical container rotating shaft 112 inside the inner cylindrical container 1113, and a screw shaft sprocket 1144 is fixed to the end of the screw shaft 1142. ing.
A screw blade 1141 is fixed to the outer peripheral surface of the screw shaft 1142, but a notch is formed in a portion of the screw blade 1141 that interferes with the inner cylindrical container inlet tube 1114.
A screw shaft transmission unit 115 is disposed in a space in which the cylindrical container boss 1112 is hollowed, and a cylindrical container shaft sprocket 1151 is fixed to the cylindrical container rotating shaft 112 in the space. In this space, an intermediate sprocket shaft 1153 parallel to the cylindrical container rotating shaft 112 is disposed via an intermediate sprocket bearing 1154, and a two-row intermediate sprocket 1152 is fixed to the intermediate sprocket shaft 1153.
A roller chain 1155 is suspended between the cylindrical container shaft sprocket 1151 and one intermediate sprocket of the two-row intermediate sprocket 1152, and between the screw shaft sprocket 1144 and the other intermediate sprocket of the two-row intermediate sprocket 1152. Another roller chain 1155 is suspended.
Since the number of teeth of the cylindrical container shaft sprocket 1151 is smaller than the number of teeth of the screw shaft sprocket 1144, if the number of rotations of the cylindrical container 111 is, for example, 200 rpm, the number of rotations of the screw conveyor 114 is smaller than 200 rpm. . That is, the difference between the rotational speed of the cylindrical container 111 and the rotational speed of the screw conveyor 114 is the relative rotational speed of the screw conveyor 114 with respect to the cylindrical container 111, and the relative rotational speed and the blade pitch of the screw blades 1141 are the unit time of the granule. It is a factor that determines the amount of transfer per unit.
The bearing unit 154 that supports the cylindrical container rotating shaft 112 is fixed to the wheel mounting bracket 152, and the wheel 151 is fixed to the wheel mounting bracket 152.
In the portion where the cylindrical container fixed double pipe 117 is disposed, the cylindrical container fixed double pipe 117 is fixed to the wheel mounting bracket 152, and the wheel 151 is fixed to the wheel mounting bracket 152. The non-rotating inlet-side pipe line sandwiched between the cylindrical container fixed inlet outer pipe 1171 and the cylindrical container fixed outlet inner pipe 1172 does not obstruct the flow path of the medium fluid, and the cylindrical container fixed inlet outer pipe 1171 and the cylindrical container. A member for connecting the fixed outlet inner pipe 1172 is arranged. Further, the cylindrical container fixed outlet inner pipe 1172 and the bearing unit 154 are arranged with members that connect the cylindrical container fixed outlet inner pipe 1172 and the bearing unit 154 so as not to obstruct the flow path of the medium fluid.
In the centrifugal rotating granule storage and granule supply tank 110 configured as described above,
Particles and medium fluid that have flowed in from the outside of the centrifugal rotary particle storage / particle supply tank 110 through the inlet side pipe 1171 sandwiched between the cylindrical container fixed inlet outer pipe 1171 and the cylindrical container fixed outlet inner pipe 1172 The mixed-phase fluid flows into the inner cylindrical container 1113 through the inner cylindrical container inlet tube 1114, and the mixed-phase fluid collides with the screw blades 1141 of the screw conveyor 114 in the inner cylindrical container 1113. Thus, the particles are separated from the medium fluid, and the separated particles are stored in a state of being pressed in the outer peripheral direction on the inner peripheral surface of the inner cylindrical container 1113 by the action of centrifugal force.
Next, the particles are transported in the direction of the particle discharge hole 1116 by the action of the screw conveyor 114 and then discharged from the particle discharge hole 1116.
The medium fluid from which the particles are separated inside the inner cylindrical container 1113 includes an inner cylindrical container outlet hole 1115, an annular space between the outer cylindrical container 1111 and the inner cylindrical container 1113, and a cylindrical container outlet inner pipe 1118. Through the space sandwiched between the cylindrical container bosses 1112, it reaches the non-rotating outlet side pipe line inside the cylindrical container fixed outlet inner pipe 1172, and then the centrifugal rotating particle storage and particle supply tank 110 The particles discharged from the particle discharge hole 1116 are mixed and mixed with the medium fluid at the exit portion of the annular space, and the mixed phase fluid of the particles and the medium fluid is generated again. Is formed.

A centrifugal impeller unit 120 of granular material, such as an abrasive material of a preferred embodiment according to claim 3, constructed in accordance with the present invention;
A centrifugal impeller first shaft core member 1241, a centrifugal impeller second shaft core member 1242, a blade surrounding member 1243, a blade member 1244, and a centrifugal impeller 124 configured at least from a particle injection hole 1245; Centrifugal impeller rotating shaft 123; Centrifugal impeller bearing unit 122; Centrifugal impeller inlet inner pipe 1216 constituting a centrifugal impeller inlet side pipe 1216; Centrifugal impeller inlet inner pipe 1216; A centrifuge wheel outlet outer pipe 1218 constituting a centrifuge wheel outlet side pipe line in a space between the pipe 1218 and the centrifuge wheel inlet inner pipe 1216; and an end portion of the centrifuge wheel second shaft core member 1242 is opened. A centrifugal impeller seal 125 that hermetically seals a gap between the inner circumference of the cylinder and the outer circumference of the centrifugal impeller outlet outer pipe 1218; a main frame 141, a centrifugal impeller drive motor 142, and a drive shaft 143. For centrifugal wheel It is at least composed of; force unit 140.
Each of the centrifugal impeller rotary shaft 123, the centrifugal impeller first shaft member 1241, the centrifugal impeller second shaft member 1242, the blade surrounding member 1243, the blade member 1244, and the particle injection hole 1245 are It is configured to rotate about the same single axis, and the outer circumference circle of the first axis member 1241 and the inner circumference circle and the outer circumference circle of the second axis member 1242 are the same. Is formed concentrically with the central axis as the central axis. On the other hand, the axial core space and the double pipe line of the inlet side pipe line and the outlet side pipe line do not rotate, but the same 1 The axial center space is a region sandwiched between the outer peripheral surface of the first axial core member 1241 and the inner peripheral surface of the second axial core member 1242. The end of the axial space is the double of the double pipe of the inlet side pipe and the outlet side pipe It faces the end of the cylindrical space, and the faced portion is cut off from the space outside the centrifugal impeller unit and communicated as tightly as possible; on the outer peripheral surface of the second shaft core member 1242 A plurality of blade members 1244 extending radially from the outer peripheral surface and a blade surrounding member 1243 are fixed, that is, the inside of the radial cylindrical body formed by integrating the blade member 1244 and the blade surrounding member 1243. The space is communicated with the axial space; only the granular material is captured and separated from the mixed phase fluid of the granular material and the medium fluid flowing through the flow path from the axial space to the outlet pipe, and then the Since the centrifugal force is imparted to the captured particles by the blade member 1244 and injected from the particle injection hole 1245 toward the outside at a high speed, the end on the rotating shaft side of the blade member 1244 has the particle in the axial space. Eyes that effectively supplement the body Therefore, the opening area of the particle injection hole 1245 is a high-speed particle passing through the particle injection hole 1245 per unit time. Based on the numerical value of the aperture area calculated using the volume of the body as basic data, the opening area of the granule injection hole 1245 is formed as small as possible.

According to a fourth embodiment of the present invention, the apparatus for projecting particles onto the inner surface of the tube projects the particles such as the abrasive toward the inner wall of the tube while moving along the inner surface of the tube. And it is a granule projection apparatus to the inner surface of a pipe | tube provided with what is called the recycle use function of a to-be-projected grain body which collect | recovers and projects this projected grain body again toward this pipe | tube inner wall.
The particle projection device to the inner surface of the pipe includes the centrifugal rotary particle storage and particle supply tank 110 according to claim 1 and the centrifugal impeller unit 120 according to claim 3. Further, the particle projection device to the inner surface of the tube has a tube inner surface contact seal 21 for dividing the inside of the tube into an upstream region having a high pressure and a downstream region having a low pressure, and a partition member. A pressure boundary partition unit 121 as a pressure boundary wall comprising a conical cylindrical case member 1211 and a cylindrical case member 1212 is provided; A centrifugal impeller unit and a granule supply tank according to claim 1, wherein a centrifugal impeller unit 120 is disposed, and a centrifugal rotating granule storage and granule supply tank according to claim 1 is provided in a region downstream of the pressure boundary partition unit 121. 10 is disposed.
Regarding the pressure boundary partition unit 121, the outer shape of the pressure boundary partition unit 121 viewed from the direction of the axis of the tube 1 is the same as the shape of the inner surface of the tube 1. A double pipe is arranged in an airtight manner in the portion, and the downstream side of the pipe inside the double pipe is communicated with the inlet side pipe of the centrifugal impeller unit 120, that is, the centrifugal impeller inlet inner pipe 1216. The upstream side of the inner pipe of the double pipe is communicated with the outlet pipe of the centrifugal rotary particle storage / granule supply tank 110, and the outer pipe of the double pipe. That is, the downstream side of the valve case inlet pipe 1213 communicates with the inlet side pipe of the centrifugal rotary particle storage / granule supply tank 110, and the pipe outside the double pipe, that is, the valve case inlet pipe 1213. End on the upstream side It opens in the region upstream of the pressure boundary partition unit 121, that is, the conduit outside the double conduit, that is, the upstream side of the valve case inlet pipe 1213 and the region upstream of the pressure boundary partition unit 121 are The end of the centrifugal impeller unit 120 on the downstream side, that is, the downstream end of the centrifugal impeller exit pipe 1218 is open in the region on the downstream side of the pressure boundary partition unit 121. The outlet side pipe of the impeller unit 120, that is, the downstream side of the centrifugal impeller outlet outer pipe 1218, that is, the final outlet pipe 1219 of the centrifugal impeller, and the downstream region of the pressure boundary partition unit 121 communicate with each other; In the apparatus for projecting a granular material onto the inner surface of the pipe, the pressure boundary part is formed inside the pipe 1. The medium fluid always flows from the upstream side to the downstream side of the boundary unit 121 by the action of the roots pump 3, but the particles after being projected toward the inner wall of the tube 1 are mixed phase fluids with the medium fluid. And flows into the inside of the centrifugal rotary type granule storage and granule supply tank 110 through the pipe outside the double pipe of the pressure boundary partition unit 121, and then in the inside of the tank Is separated from the medium fluid, and the separated particles are once stored on the inner peripheral surface of the tank by the action of centrifugal force, and then the particles are directed to the side of the tank by the action of the screw conveyor 114. Is then discharged from the granule discharge hole 1116, and a mixed phase fluid of the particles and the medium fluid is formed again. Next, the mixed phase fluid passes through the double pipe of the pressure boundary partition unit 121. Through the side pipe to the inlet side pipe of the centrifugal impeller unit 120. Next, the particles are separated from the medium fluid in the axial core space of the centrifugal impeller unit 120 and then centrifuged by the blade member 1244. The medium fluid after being subjected to the force and projected from the particle injection hole 1245 toward the inner wall of the tube at a high speed, while being separated from the particle, passes through the centrifugal impeller final outlet tube 1219 and becomes a pressure boundary. It flows out to the area | region of the downstream of the partition unit 121, and the motion of the mixed phase fluid of the granular material and medium fluid which were described above is repeated hereafter.
In addition, the flexible pipe joint unit 150 having a double-pipe structure firmly connects the centrifugal rotary particle storage / granule supply tank 110 according to claims 1 and 2 and the centrifugal impeller unit 120 according to claim 3. The outer flexible pipe joint 1501 connects the cylindrical container fixed inlet outer pipe 1171 and the valve case outlet outer pipe 1215, and the inner flexible pipe joint 1502 is a cylindrical container fixed outlet inner pipe. 1172 and the valve case inlet inner pipe 1217 are connected.
Referring to FIG. 1, a description will be given of the manner in which the device on the inner surface of the pipe 1 in the apparatus of the preferred embodiment constructed according to the present invention moves along the inner surface of the pipe 1. 1 is subjected to a strong moving pressure from the upstream region toward the downstream region, and thus the device is moved along the tube 1 by winding or unwinding the wire rope 701 by the winch 7, The running speed of the device is controlled by controlling the winding and unwinding speed of the rope 701.

The apparatus of the preferred embodiment according to claim 5, constructed in accordance with the present invention, has an outlet portion that opens from the inlet portion that opens to the upstream region of the pressure boundary partition unit 121 to the downstream region of the pressure boundary partition unit 121. Of the upstream region and the downstream region, which are arranged at the upstream inlet portion of the conduit, the downstream outlet portion, or the middle portion of the conduit. It is the apparatus which concerns on the pressure regulation valve arrange | positioned for the purpose of adjusting the pressure difference with a pressure.
In the apparatus of the preferred embodiment configured according to the present invention, the pressure regulating valve opens from the inlet portion opened to the upstream region of the pressure boundary partition unit 121 to the downstream region of the pressure boundary partition unit 121. However, in order to prevent wear of the pressure relief valve plate 126 due to particle collision, it is arranged at the outlet portion on the downstream side of the conduit. It is better to be done.
The configuration of the pressure regulating valve will be described with reference to FIG. 6. The annular pressure relief valve plate 126 is positioned so as to close the annular space sandwiched between the valve case inlet pipe 1213 and the centrifugal impeller inlet pipe 1216. When the pressure difference between the pressure in the upstream area and the pressure in the downstream area is small, the pressure relief valve plate 126 is closed by the force of the coil spring 127. Next, when the pressure difference increases due to an increase in the flow rate of the medium fluid sucked into the Roots pump 3, the pressure relief valve plate 126 receives pressure toward the coil spring 127. Becomes larger, the pressure relief valve plate 126 overcomes the force of the coil spring 127 and opens, so that the medium is directed from the annular space toward the inlet-side pipeline of the centrifugal rotary particle storage / particle supply tank 110. The fluid flows in, and thus the pressure relief valve plate 126 opens to a position where the force received by the pressure relief valve plate 126 and the force of the coil spring 127 are balanced.
Referring to FIG. 4, the absolute pressure values P1, P2, P3, and P4 of arbitrary parts are compared as follows.
P1>P2>P3> P4
The effect of the pressure regulating valve will be described. When the pressure in the upstream region of the pressure boundary partition unit 121 becomes larger than the pressure in the downstream region of the pressure boundary partition unit 121, the end portion of the pipe inner surface contact seal 21 will be described. Is more strongly pressed against the inner wall of the tube 1, and thus the sealing function of the tube inner surface contact seal 21 is increased, so that the medium fluid flowing downstream in the tube 1 is between the tube 1 and the tube inner surface contact seal 21. Therefore, the flow path of the medium fluid that flows through the inside of the pipe 1 to the downstream side is a flow in an annular space sandwiched between the valve case inlet pipe 1213 and the centrifugal impeller inlet pipe 1216. Therefore, the particles such as the abrasive after being projected onto the inner wall of the tube 1 by the centrifugal impeller 124 are more effectively centrifugally rotated and stored. Supply It is possible to recover transported to click 110.

Although the preferred embodiment of the apparatus of the present invention has been described above, various embodiments of the apparatus of the present invention can be considered in addition to the preferred embodiment according to the claims.
In the description of the apparatus of the preferred embodiment, the Roots type vacuum pump 3 is arranged on the downstream side of the pipe 1, but the Roots type discharge pump 3 can be arranged on the upstream side of the pipe 1.
In the description of the apparatus of the preferred embodiment, the apparatus and the pipe are described as being in the atmosphere, but the apparatus of the present invention can be applied even when the apparatus and the pipe are in water. .

Regarding the field of use of the apparatus of the present invention, the pipe structure in which the conventional centrifugal projection apparatus cannot perform the blasting operation because the blasting material cannot be supplied by natural fall depending on the installation position such as the installation angle of the pipe structure. For example, as an example of the pipe structure, a hydraulic iron pipe, a water supply pipe, a drain pipe, a gas pipe, or an oil plant pipe of a hydroelectric power plant has a horizontal part or an inclined part. There are various types of pipe structures such as vertical parts, but the apparatus of the present invention is used for polishing work for removing foreign matters such as rust and aquatic organisms attached to the inner surface of the pipe structures. Can be suitably applied.

The whole figure which shows the apparatus structure of the suitable Example of the granular material projection apparatus to the pipe inner surface comprised according to this invention. 1 is a cross-sectional view of an apparatus disposed in a pipe in an apparatus of a preferred embodiment of a particle projection apparatus for an inner surface of a pipe constructed according to the present invention. The front view of the main apparatus among the apparatuses arrange | positioned in the pipe | tube in the apparatus of the suitable Example of the granular material projection apparatus to the pipe | tube inner surface comprised according to this invention. It is sectional drawing of the apparatus shown in FIG. 3, and is a figure which shows the flow of a fluid and a granular material. It is sectional drawing of the suitable Example of the centrifugal rotary type granule storage and granule supply tank comprised according to this invention, BB arrow part is sectional drawing of BX-BX arrow part in FIG. 8, b -B arrow part is sectional drawing of the bX-bX arrow part in FIG. FIG. 3 is a cross-sectional view of a preferred embodiment of a centrifugal projection unit of granules, such as abrasive, constructed in accordance with the present invention. Sectional drawing of the AA arrow in FIG. Sectional drawing of the BB arrow in FIG. Sectional drawing of the bb arrow in FIG. Sectional drawing of the EE arrow in FIG. Sectional drawing of the FF arrow in FIG. Sectional drawing of the ff arrow in FIG. Sectional drawing of the CC arrow in FIG. Sectional drawing of the dd arrow in FIG. Sectional drawing of the DD arrow in FIG. Sectional drawing of the GG arrow in FIG. Sectional drawing of the HH arrow in FIG.

Tube 1
Tube inner surface contact seal 21
Roots pump 3
Fluid separator 4
Winch 7
Wire rope 701
Direction of fluid flowing in the tube 80
Direction of fluid flowing in the device of the present invention 81
Direction of movement 82 of the device of the present invention
Direction of rotation of centrifugal impeller 83
Direction of flow of particles 84
Direction 85 in which the pressure boundary partition unit receives pressure
Universal joint 100
Centrifugal rotary grain storage and grain supply tank 110
Cylindrical container 111
Outer cylindrical container 1111
Cylindrical container boss 1112
Inner cylindrical container 1113
Inner cylindrical container inlet tube 1114
Inner cylindrical container outlet hole 1115 Inner cylindrical container 1113
Granule discharge hole 1116
Cylindrical container outlet radial connection tube 1117
Cylindrical container outlet inner tube 1118
Cylindrical container inlet outer tube 1119
Entrance ring hole 1120
Cylindrical container rotating shaft 112
Screw conveyor 114
Screw blade 1141
Screw shaft 1142
Screw bearing 1143
Screw shaft sprocket 1144
Screw shaft transmission unit 115
Cylindrical container shaft sprocket 1151
Double row intermediate sprocket 1152
Intermediate sprocket shaft 1153
Intermediate sprocket bearing 1154
Roller chain 1155
Rotary joint seal 116
Rotary joint outer seal 1161
Rotary joint inner seal 1162
Cylindrical container fixed double pipe 117
Cylindrical container fixed inlet outer tube 1171
Cylindrical container fixed outlet inner tube 1172
Pressure boundary partition unit 121
Conical cylindrical case member 1211
Cylindrical case member 1212
Valve case inlet pipe 1213
Valve case 1214
Valve case outlet outer tube 1215
Valve case inlet inner pipe 1217
Pressure relief valve plate 126
Coil spring 127
Centrifugal impeller unit 120
Centrifugal impeller inlet inner pipe 1216
Centrifugal impeller outlet outer pipe 1218
Centrifugal impeller final outlet pipe 1219
Centrifugal wheel bearing unit 122
Centrifugal impeller rotating shaft 123
Centrifugal wheel seal 125
Centrifugal impeller 124
Centrifugal impeller first shaft core member 1241
Centrifugal impeller second shaft core member 1242
Blade surrounding member 1243
Blade member 1244
Granule injection hole 1245
Centrifugal rotating granular tank power unit 130
Main frame 131
Centrifugal rotating granular tank drive motor 132
Drive shaft 133
Centrifugal vehicle power unit 140
Main frame 141
Centrifugal wheel drive motor 142
Drive shaft 143
Flexible fitting unit 150
Outer flexible fitting 1501
Inner flexible pipe joint 1502
Wheel 151
Wheel mounting bracket 152
Towed metal fitting 153
Bearing unit 154
Downstream fluid outlet temporary stopper 905
 

Claims (5)

The cylindrical container is configured to rotate; a screw conveyor is disposed inside the cylindrical container, and the central axis of the screw conveyor and the central axis of the cylindrical container are the same axis, The rotational speed of the rotating shaft of the screw conveyor and the rotational speed of the rotating shaft of the cylindrical container are configured to rotate at different rotational speeds; Two large and small tubes having the same axis formed in the shape are arranged, and the same axis formed in the shape of a double tube at a position facing the opening of the two large and small tubes The two large and small fixed pipes having a large and small diameter are arranged, and the two large and small pipes that rotate and the two large and small fixed pipes are connected via a rotary joint seal, that is, the two large and small fixed pipes are connected. The pipes inside and outside the cylindrical container The two pipes of the double pipe include an inlet-side pipe for allowing a mixed phase fluid of the particles and the medium fluid to flow into the cylindrical container, and a mixed phase of the particles and the medium fluid. It is composed of two types of pipelines, namely an outlet side pipeline that allows fluid to flow out of the cylindrical vessel; as described above, a rotating cylindrical vessel, a screw conveyor, an inlet side pipeline, and an outlet side pipeline In the centrifugal rotary type granule storage and granule supply tank, the mixed phase fluid of the granule and the medium fluid flowing into the inside of the cylindrical container from the inlet side pipe is a screw. The velocity of the multiphase fluid is attenuated by, for example, colliding with the screw blades of the conveyor, and the particles are separated from the medium fluid. The separated particles are pressed toward the outer periphery on the inner peripheral surface of the cylindrical container by the action of centrifugal force. Once stored, and then After the granules are transferred in the direction of the side of the cylindrical container in which the double pipe line is arranged by the action of the screw conveyor, from the grain discharge hole provided in the side of the cylindrical container, the outlet side The fluid is discharged into the pipe upstream of the pipe to form a multiphase fluid consisting of the granule and the medium fluid, and then flows into the inside of the cylindrical container from the inlet side pipe and is separated. After flowing through the inside of the cylindrical container, the medium fluid flows out of the cylindrical container from the outlet side pipe line in a state where the particles are mixed again to become a mixed phase fluid; A centrifugal rotating granule storage and granule supply tank. In the cylindrical container shaft for rotationally driving the cylindrical container, a hollow screw shaft for rotationally driving the screw conveyor is disposed on the outer peripheral portion of the cylindrical container shaft via a bearing; A sprocket is fixed; a cylindrical container shaft sprocket is fixed to the cylindrical container shaft; the screw shaft sprocket and the cylindrical container shaft sprocket are a two-row sprocket as an intermediate sprocket and two roller chains. The number of teeth of each sprocket group is set to an arbitrary number of teeth so that the rotational speed of the screw shaft is different from the rotational speed of the cylindrical container shaft; The centrifugal rotary particle storage and granule supply tank according to claim 1, wherein the centrifugal rotation particle storage and granule supply tank is provided. A rotating shaft, a first shaft member fixed to the rotating shaft, a second shaft member, a shaft space, a blade member, a blade surrounding member, a granule injection hole, and an inlet side pipe line In a centrifugal impeller unit of a granular material such as a polishing material, which is composed of at least a double pipe of an outlet side pipe; the rotary shaft, the first shaft core member, and the second shaft core member And each of the blade member, the blade surrounding member, and the granular material injection hole are configured to rotate about the same single axis as a central axis, and the first shaft core member The outer circumference circle and the inner circumference circle and the outer circumference circle of the second shaft core member are formed concentrically around the same single axis, while the shaft space and the inlet side The double pipe line of the pipe line and the outlet side pipe line does not rotate but is formed in a concentric cylinder shape with the same single axis as the central axis; the axial space is the first axial line A cylindrical space in a region sandwiched between the outer peripheral surface of the material and the inner peripheral surface of the second shaft core member; the end of the shaft core space is a double of the inlet side conduit and the outlet side conduit Facing the end of the double cylindrical space of the conduit, the facing portion being isolated from the space outside the centrifugal wheel unit and communicating as airtight as possible; A plurality of blade members extending radially from the outer peripheral surface and the blade surrounding member are fixed to the outer peripheral surface of the shaft core member, that is, the blade member and the blade surrounding member are integrally formed. The internal space of the radial cylindrical body is in communication with the axial space; only the granular material is captured and separated from the mixed phase fluid of the granular material and the medium fluid that flows through the flow path from the axial space to the outlet pipe. Subsequently, a centrifugal force is applied to the captured particles by the blade member, so that a high speed is directed from the particle injection hole to the outside. In order to inject, the end of the blade member on the rotating shaft side is arranged in a state of extending in the rotating shaft direction for the purpose of effectively supplementing the particles in the axial space; Regarding the opening area of the body injection hole, based on the numerical value of the aperture area calculated based on the volume of the high-speed particle passing through the particle injection hole per unit time as the basic data, the opening area of the particle injection hole is A centrifugal impeller unit of granular materials such as abrasives, characterized in that it is formed as small as possible; While moving along the inner surface of the tube, a so-called coated object is projected, in which particles such as abrasives are projected toward the inner wall of the tube, and the projected particles are collected and projected again toward the inner wall of the tube. In the granular projection apparatus to the pipe inner surface provided with the recycling use function of a projection granular body; The granular projection apparatus to this pipe inner surface is the centrifugal rotation type granule storage and grain of Claim 1 thru | or 2 A body supply tank; and a centrifugal impeller unit for particles such as the abrasive material according to claim 3; and a particle projection device to the inner surface of the tube; A pressure boundary partition unit as a pressure boundary wall composed of a pipe inner surface contact seal and a partition member for dividing into two regions of a low pressure downstream region; upstream of the pressure boundary partition unit; In the region, the distance of particles such as the abrasive according to claim 3 An impeller unit is disposed, and a centrifugal rotary particle storage and granule supply tank according to claim 1 is disposed in a region downstream of the pressure boundary partition unit; Regarding the pressure boundary partition unit, the outer shape of the pressure boundary partition unit viewed from the direction of the axis of the tube is the same as the shape of the inner surface of the tube, The double pipe is arranged in an airtight manner, and the upstream side of the pipe inside the double pipe is communicated with the inlet pipe of the centrifugal impeller unit. The downstream side of the pipe is connected to the outlet side pipe of the centrifugal rotary type granule storage / granule supply tank, and the downstream side of the pipe outside the double pipe is the centrifugal rotary type granule. Communicating with the inlet-side pipeline of the storage and granule supply tank The upstream end of the conduit outside the double conduit is open in the region upstream of the pressure boundary partition unit, i.e. upstream of the conduit outside the double conduit. And the upstream side region of the pressure boundary partition unit are in communication with each other, and the downstream end of the outlet side pipe line of the centrifugal impeller unit opens in the downstream region of the pressure boundary partition unit. That is, the downstream side of the outlet side pipe of the centrifugal impeller unit and the downstream side of the pressure boundary partition unit communicate with each other; the inner surface of the pipe configured as described above In the particle projection device, the medium fluid always flows from the upstream side to the downstream side with the pressure boundary partition unit as the boundary in the pipe, but the particle after being projected toward the inner wall of the pipe is the medium. Into the centrifugal rotary granule storage and granule supply tank through the pipe outside the double pipe of the pressure boundary partition unit, and then into the inside of the tank. The granules are separated from the medium fluid, the separated granules are once stored on the inner peripheral surface of the tank by the action of centrifugal force, and then the granules are moved to the side of the tank by the action of a screw conveyor. Is then discharged from the granule discharge hole and again forms a multiphase fluid of the granule and the medium fluid, and then the multiphase fluid is disposed inside the double pipe of the pressure boundary partition unit. After passing through the pipeline to the inlet side pipeline of the centrifugal impeller unit, the particles are separated from the medium fluid in the axial core space of the centrifugal impeller unit and then given centrifugal force by the blade member. From the particle injection hole to the inner wall of the pipe On the other hand, the medium fluid that has been projected at a high speed and separated from the particles is discharged to the downstream region of the pressure boundary partition unit. Thereafter, the mixed phase fluid of the particles and the medium fluid described above is used. The particle projection device to the inner surface of the tube, characterized in that it is configured as described above. In the pipe line from the inlet part opened in the upstream area of the pressure boundary partition unit to the outlet part opened in the downstream area of the pressure boundary partition unit, the upstream inlet part of the pipe line, or the downstream side The pressure adjusting valve for adjusting a pressure difference between the pressure in the upstream region and the pressure in the downstream region is provided at an outlet portion or a middle portion of the pipe line. The granular object projection apparatus to the pipe inner surface of description.

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