JP5618327B2 - Fluid screen changer - Google Patents

Description

  The present invention relates to a fluid screen changer.

  There existed what was shown to the following patent document 1 as a prior art. That is, a casing main body having a rotating rod hole for guiding a cylindrical rotating rod to rotate around its central axis, and a rotatable passage inserted into the rotating rod hole to connect the movable passage to the outer circumferential surface. And two rotation rods arranged in parallel in the axial direction, and a rotation drive shaft coupled to one or both ends of the rotation rod. And the movable passage provided in the said rotation rod penetrates on the straight line which passes through the diameter of this rod substantially, and the filtration means is inserted coaxially in it.

Japanese Patent No. 3806767

  However, in this technique, the movable passage provided in the rotating rod passes through a straight line passing through the diameter of the rod, and the filtering means is inserted coaxially therein. Therefore, the diameter and axial length of the passage are limited to the diameter of the rod. In other words, the passage volume is in principle limited by the rod diameter. Accordingly, the size of the filtering means accommodated therein, that is, the filtration area, is severely limited by the diameter of the rod. For this reason, in order to obtain a necessary filtration area, the diameter of the rod has to be increased, and an increase in the size and weight of the entire apparatus including the momentary casing must be accepted.

An object of the present invention is to solve the above problems and to provide a fluid screen changer that can be reduced in size and weight without reducing the filtration area.

A first problem-solving means of the present invention is a casing body having a rotation bar hole for guiding a column-shaped rotation bar so as to be rotatable about its central axis, and is rotatably inserted into the rotation bar hole. A plurality of rotating rods arranged in parallel in the axial direction with a movable passage that is a concentric straight cylindrical hole on the axis, a rotating drive shaft coupled to one or both ends of the rotating rod, and the rotating rod And an inlet disposed in the axial direction of the rotary rod hole so as to communicate with the movable passage through an inlet communication passage and an outlet communication passage. A main passage and an exit main passage.

The second problem solving means of the present invention is that, in addition to the first means, the filtering means comprises a bottomed filter tube, and includes a reinforcing porous tube and a screen stretched on the outer periphery, the inner periphery or the middle thereof. .

The third problem solving means of the present invention is that, in addition to the first means, the filtering means includes a perforated plate and a screen.

A fourth problem-solving means of the present invention is that, in addition to the first means, the filtering means comprises a cylindrical body having a large number of filtering holes.

The fifth problem solving means of the present invention is that, in addition to any one of the means described above, the area of the casing outlet and the corresponding movable passage outlet is the same or different with respect to the area of the casing inlet and the corresponding movable passage inlet. It is.

According to the present invention, since the filtering means is inserted coaxially with the rotating rod, the filtering area is not strictly limited by the diameter of the rod as in the prior art, so that the fluid screen changer causes a reduction in the filtering area. It became possible to reduce size and weight.

It is a perspective view of one Example of this invention. It is Y2-Y2 sectional drawing of FIG. It is X3-X3 sectional drawing of FIG. FIG. 3 is a partially enlarged view of FIG. 2. It is sectional drawing corresponding to FIG. 3 of 2nd Example of this invention. It is sectional drawing corresponding to FIG. 3 of 3rd Example of this invention. It is sectional drawing corresponding to FIG. 3 of 4th Example of this invention. It is a front view of 5th Example of this invention. It is Y8b-Y8b sectional drawing of FIG. 8a. It is Y8c-Y8c sectional drawing of FIG. 8a. It is Y9-Y9 sectional drawing of FIG. 8b. It is a side view of 6th Example of this invention. It is a graph explaining the effect of this invention. It is a graph explaining the effect of this invention.

An embodiment of the present invention will be described below with reference to the drawings.
1, 2, and 3, the casing body 10 has a steel block shape whose outer shape is a horizontally long rectangle in a front view, a rectangle in a side view, and a horizontally long rectangle in a plan view. Then, the cylindrical rotation rod hole 15 is arranged in parallel on the axis extending in the left-right direction so that the columnar rotation rod 2 described later can be guided around its central axis. .

  The casing main body 10 is provided with an inlet main passage 11 and an outlet main passage 12 so as to communicate with the rotation rod hole 15 from one outer surface (front surface) thereof and open to the other outer surface (front surface). An inlet communication path 13 and an outlet communication path 14 are provided so that they communicate with the two movable paths 2a described below.

  Two rotating rods 2, 2 parallel to the axial direction are inserted into the rotating rod hole 15 so as to be rotatable. Each rotating rod has a movable passage 2a on the outer circumferential surface. The movable passage is a straight cylindrical hole concentric with the axis, one of which opens at the large-diameter portion 2b, and the other becomes the reduced-diameter portion 2c through the tapered step portion, and an outlet that is bent from the bottom along the axis and radially. 2e is provided. An inlet 2d penetrating in the radial direction is provided near the large diameter portion. The inlet 2d and the outlet 2e communicate with the inlet communication path 13 and the outlet communication path 14, respectively.

  In this way, the rotary rod hole is arranged such that the inlet main passage 11 and the outlet main passage 12 provided in the casing body communicate with the movable passage 2 via the inlet communication passage 13 and the outlet communication passage 14. 15 are spaced apart in the axial direction. In addition, the inlet 2d and the outlet 2e are spaced apart in the axial direction so that the movable passage 2a of the rotating rod 2 communicates with the inlet main passage 11 and the outlet main passage 12, and the rod is substantially cross-sectional on the axis. It will change direction.

  A filtering means 20 is inserted coaxially into the movable passage 2 b of the rotating rod 2. The filtering means comprises a bottomed filter cylinder and is configured as follows. The reinforced porous cylinder 21 has a right cylinder and is concentric with the rotating rod 2, and a cylindrical screen 22 is mounted on the outer periphery (or the inner periphery and the middle). The bottom member 23 attached to one end of the reinforced porous cylinder with a screw has an outer center protruding outward. The other end of the reinforced porous cylinder 21 is attached to the reduced diameter portion 2b with a screw. Thereby, a space | interval is maintained between the cylindrical screen 22 and the inner surface of the large diameter part 2b of a movable channel | path, and the filtration chamber is comprised inside this space | interval and the reinforcement porous cylinder 21. As shown in FIG.

  A rotation drive shaft 3 is coupled to one end of the rotation rod 2. The flange portion of the lid 4 is fixed to the casing body with a bolt at the other end of the rotating rod and at the open end of the movable passage. The central portion of the lid enters the movable passage, and is provided with a discharge hole 4a used for backwashing described later.

The operating state will be described above.
During normal operation, the fluid that has entered from the inlet main passage 11 of the casing 10 is divided into two inlet communication passages 13, enters the filtration chamber from the inlet 2 d of the movable passage, passes through the screen 22, and opens to the circumference of the filtration cylinder 2. It passes through the inside of the filter cylinder from the hole formed, passes through the outlet 2e of the movable passage, passes through the casing outlet main passage 12, and enters the next device. During this time, fluid impurities are filtered by the screen 22.

  When the screen 22 is replaced, if the screen on one side (upper side) is clogged, the casing inlet communication path 13 and the movable path 2a are disconnected from each other when the upper rotating rod rotates about 45 degrees in the direction of the arrow in FIG. Further, the outlet communication path 14 and the movable path outlet 2e are disconnected. Accordingly, since the fluid inlet / outlet of the filtration chamber stops, the screen filter cylinder 20 can be removed from the apparatus by removing the lid 4 and replaced with a new screen filter cylinder.

FIG. 4 shows another embodiment in which the screen 22 can be back-cleaned.
In the above description, the area of the casing outlet 12 and the corresponding movable passage outlet 2e is the same as the area of the casing inlet 11 and the corresponding movable passage inlet 2d. That is, FIG. 4 is an enlarged view corresponding to the central portion of FIG. In order to perform reverse cleaning of the screen, the inlet communication path 13 may be made smaller than the outlet communication path 14. That is, assuming that the diameter Φd of the inlet communication path 13 and the diameter of the outlet communication path 14 are ΦD, ΦD> Φd.

  That is, in the case of ΦD> Φd, in FIG. 4, X is X ′ and the passage is closed, but even if Y is Y ′, the passage is not closed and there is a gap δ. From here, the fluid on the outlet side passes through the movable passage 2a from the outlet communication passage 14, passes through the filter cylinder inner chamber, and is pushed out from the inside of the hole by the outlet side pressure. As a result, the impurities adhering to the surface from the inside of the one-side screen are washed out together with the fluid and discharged out of the machine from the discharge hole 4a of the lid 4. When the discharge is finished, the rotating rod 2 is turned in the reverse direction to return to the original state.

  FIG. 5 shows a third embodiment in which a rotary drive shaft is provided at both ends of the rotating rod 2. The rotary rod 2 has a portion 2b1 corresponding to a large diameter portion and a small diameter portion 2c1 through a step divided on the outside through the step 2c2 in the axial direction, and the lid 4 has a flange portion 41 and a central portion 42 separated from each other. Has been. Then, the central portion is coupled to the large-diameter portion 2b1 of the rotating rod with a screw, the second drive shaft 3a provided at the central portion penetrates through the lid, and the second rotary handle 5a is attached to the end. . The filter cylinder 20 (21) is attached to the inside of the small diameter part 2c1 through the step with a screw. The other parts are the same as in FIG.

  As described above, the rotating rod 2 is divided into a portion corresponding to the large diameter portion and a small diameter portion via the step in the axial direction, so that the rotational force of each portion becomes small, and the operation is easy. . Further, by independently adjusting the opening degree of the inlet and outlet passages, it becomes easy to control the flow rate and pressure.

  FIG. 6 shows a cylindrical body having a large number of filtration holes as the bottomed filtration cylinder 20. The cylindrical body is fitted and fixed in the through hole of the disk holder 6. The holder 6 is attached to the exit side of the movable passage 2a of the rotating rod 2 with a screw.

  FIG. 7 shows a porous plate and a screen as the filtering means. The movable passage is a straight cylindrical hole concentric with the axis, one of which opens at the large diameter portion 2b, and the other becomes a tapered diameter reduced portion through a circumferential groove. 2e is provided. A filtering means is inserted coaxially into the movable passage 2 b of the rotating rod shaft 2. The filtering means comprises a perforated plate and a screen, and is configured as follows. A circular perforated plate 4a and a screen 4b are fixed to one end of the cylindrical guide 4c, and the other end of the guide 4c is attached to the circumferential groove with a screw.

  8 and 9, each of the inlet communication path 13 and the outlet communication path 14 is formed in a straight line extending on the diameter connecting the rotation rod holes, and the inlet main path 11, the inlet communication path 13, the outlet main path 12, and the outlet communication. An inlet three-way switching valve 30 and an outlet three-way switching valve 40 are provided at each intersection with the passage 14. By making each of the inlet communication path 13 and the outlet communication path 14 linearly extending on the diameter connecting the rotation rod holes, the vertical length (depth) of the casing is shortened. The valve stem can be made thin and operated with a small force.

  In the switching valves 30 and 40, T-shaped flow paths 30b and 40b are provided near the tips of the cylindrical valve rods 30a and 40a, and the operation rods 30 and 40c extend from the end of the valve rod to the outside of the casing. Handles 30d and 40d are provided. Packings 30e and 40e are provided in the vicinity of the end of the valve stem to maintain liquid tightness with the holes in the casing.

  The operating state will be described above. During normal operation, the fluid entering from the main inlet 11 of the casing 10 is divided into two communication passages 13, enters the filtration chamber, enters from the hole of the filter cylinder 20 with a screen, and is discharged from the casing outlet 12 through the filter cylinder outlet. . The fluid containing impurities is filtered by the screen 22.

  At the time of screen backwashing, if the lower screen in FIG. 8 is clogged, turning the inlet switching valve 30 90 degrees counterclockwise (FIG. 8b) stops the flow of fluid in the lower filtration chamber. At this time, the fluid due to the pressure at the outlet side of the casing enters the inside of the porous cylinder 21 below the communication passage 14 (FIG. 8c), flows in from the back surface of the screen 22, and peels off the impurities attached to the screen together with the fluid. And is discharged from the discharge hole 4a. At this time, all the fluid passes through the upper filtration chamber and flows out from the outlet 12, so that there is no problem in operation. This time, when the inlet switching valve 30 is turned 90 degrees to the right (FIG. 8b), the flow of fluid in the upper filtration chamber stops and the upper filtration cylinder is backwashed in the same manner.

  When replacing the lower screen, when the inlet switching valve 30 is turned 90 degrees to the left (FIG. 8b) and the outlet valve 40 is turned 90 degrees to the right (FIG. 8c), the fluid in the lower filtration chamber is shut off and the lid is closed. 4 is removed and the filter cylinder 20 is taken out and replaced with a new one. When replacing the upper screen, turn the switching valve back 90 degrees. When there is no outlet switching valve 40, the entire molding line is stopped.

FIG. 10 shows three rotating bars arranged in parallel.
11 and 12 are graphs for explaining the effect of the present invention. FIG. 11 shows the difference in diameter of the rotating rod between the present invention (bottomed filter tube 20 in FIG. 3) and the prior art (described in the background art) (bottomed filter tube similar to the present invention). The horizontal axis is the screen area, and the vertical axis is the diameter. FIG. 12 shows the difference in machine weight due to the difference in diameter of the rotating rod, where the horizontal axis is the screen area and the vertical axis is the weight. From these, it can be seen that due to the difference in structure, the diameter of the rotating rod is reduced, the entire machine is compact, lightweight, and cost is reduced.

  The present invention is not limited to the embodiments and embodiments described above, and includes various modifications without departing from the scope of the claims.

  The present invention is used in a fluid screen changer.

DESCRIPTION OF SYMBOLS 10 Casing main body 11 Inlet main passage 12 Outlet main passage 13 Inlet communication passage 14 Outlet communication passage 15 Rotating rod hole 20 Filtration means 21 Reinforcing porous cylinder 22 Screen 23 Bottom member 2 Rotating rod 2a Movable passage 2b Large diameter portion 2c Reduced diameter 2d Inlet 2e Outlet 3 Rotating drive shaft 4 Lid 4a Discharge hole 5 Handle 5a Second handle 6 Holder

Claims (5)

A casing main body having a rotation rod hole for guiding the columnar rotation rod so that it can rotate around its central axis;
A plurality of rotating rods which are inserted into the rotating rod holes so as to be rotatable and have a movable passage which is a straight cylindrical hole concentric with the axis, and are coupled to one or both ends of the rotating rods in parallel in the axial direction. A rotation drive shaft;
Filtering means inserted coaxially with the pivot rod;
A fluid that is provided in the casing body and includes an inlet main passage and an outlet main passage that are spaced apart in the axial direction of the rotating rod hole so as to communicate with the movable passage through an inlet communication passage and an outlet communication passage. Screen changer. The fluid screen changer according to claim 1, wherein the filtering means includes a bottomed filter cylinder, and includes a reinforcing porous cylinder and a screen stretched on an outer periphery, an inner periphery, or an intermediate portion thereof. The fluid screen changer according to claim 1, wherein the filtering means includes a perforated plate and a screen. The fluid screen changer according to claim 1, wherein the filtering means comprises a cylindrical body having a large number of filtering holes. 5. The fluid screen changer according to claim 1 , wherein an area of the casing outlet and a corresponding movable passage outlet is the same as or different from an area of the casing inlet and the corresponding movable passage inlet.

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