WO2005037400A1

WO2005037400A1 - Screen changer for fluid

Info

Publication number: WO2005037400A1
Application number: PCT/JP2004/015969
Authority: WO
Inventors: Takeo Tsuchiya
Original assignee: Gpc. Tsuchiya Inc.
Priority date: 2003-10-22
Filing date: 2004-10-21
Publication date: 2005-04-28
Also published as: JP2005125184A

Abstract

A screen changer for fluid capable of reducing a force and an energy required for operation by reducing the pressing force of a movable rod (sliding rod, rotating rod) against the inner surface of a casing, comprising a casing body having a movable bar hole movably guiding the cylindrical movable bar and an inlet passage and an outlet passage passed to the bar hole, the movable bar movably inserted into the movable bar hole and having movable passages, and bottomed filtration tubes inserted into the movable passages. The bottomed filtration tubes further comprise reinforced porous tubes, screens put thereon, and bottom members fitted to one ends thereof, and are inserted into the movable passages with the bottom sides thereof positioned at the inlet sides of the movable passages. The anti-bottom sides of the bottomed filtration tubes are detachably fitted to the movable passages. Also, porous plates and the screens are inserted into the movable passages, and caps with openings are detachably fitted thereto. The openings of the caps with openings are converged from the inside toward the inlet passage.

Description

Fluid screen changer Technical field

The present invention relates to a fluid screen cleaner. Rice field

Background art

Conventionally, as this kind, a casing body having a rod hole for guiding a sliding rod so as to be slidable, having an inlet passage and an outlet passage penetrating the rod hole, and slidably inserted into the rod hole. Some of the sliding rods have two movable passages and a filtering member inserted into the movable passages. (Japanese Unexamined Patent Publication No. Hei 91-164 580)

In some cases, instead of the sliding rod, two serial and parallel cylindrical rotating rods can be rotated. (Japanese Unexamined Patent Publication No. 9-225953)

In addition, there was one in which two sliding rods were arranged in parallel with the casing. (Japanese Unexamined Patent Publication No. 4-1716)

In these prior arts, the movable rod (sliding rod, rotating rod) becomes large from the inlet to the outlet due to the difference between the force by the fluid pressure on the inlet side and the force by the fluid pressure on the outlet side. It is pressed against the inner surface of the casing by force. For this reason, a large force and a large amount of energy were required to operate the movable rod.

The present invention solves the above-mentioned problems, and reduces the pressing force of movable rods (sliding rods, rotating rods) against the inner surface of a casing, thereby reducing the force and energy required for operation. The purpose is to provide a changer. Disclosure of the invention

The first aspect of the present invention has a movable rod hole for guiding a movable movable rod having a column shape. A casing body having an inlet passage and an outlet passage penetrating the rod hole, a movable rod movably inserted into the movable rod hole and having a movable passage, and a bottomed filtration tube inserted into the movable passage. The bottomed filter tube has a reinforced porous tube, a screen stretched around its outer periphery, inner periphery, or middle, and a bottom member provided at one end thereof. It is characterized in that, at the position inserted on the inlet side of the movable passage, the opposite bottom side of the bottomed filtration tube is detachably attached to the movable passage.

According to a second aspect of the present invention, in addition to the first aspect, the movable passage of the movable bar extends from the inside toward the inlet passage. The feature is that it matches the entrance passage or is reduced to the vicinity.

According to a third aspect of the present invention, in addition to the first aspect or the second aspect, the bottomed filter cylinder has a fluid outlet side, an inner diameter of which is enlarged from the inside toward the outlet, and the casing outlet passage coincides with this. It is characterized by a straight cylindrical hole having a diameter of

According to a fourth aspect of the present invention, there is provided a casing body having a movable rod hole for guiding the movable rod so as to be movable, having an inlet passage and an exit passage penetrating the rod hole, A movable member inserted into the movable passage, and a filtering member formed of a porous plate and a screen inserted into the movable passage. An opening cap is detachably attached, and the opening of the opening cap is directed from the inside to the inlet passage, and is matched with or close to the inlet passage of the casing.

Here, the movable rod includes a sliding rod and a rotating rod. In addition, as specific means for detachably attaching the bottomed filtration tube and the cap with an opening to the movable passage, a screw, a bolt, a fitting type with a projection and a groove in which the projection fits, and the like are applied.

Since the bottomed filter tube is detachably attached to the movable passage, the rod pressing force has been considerably reduced. Further, the movable passage of the movable rod is directed from the inside toward the inlet passage, and is reduced from the vicinity of the outer edge of the bottom member of the bottomed filter tube to the inlet passage of the casing or to the vicinity thereof.

. The bottomed filter cylinder has an inner diameter that expands from the inside toward the outlet at the fluid outlet side, The outlet passage is a straight cylindrical hole of a corresponding diameter. As a result, the rod pressing force at the inlet is reduced, the rod repulsion at the outlet is increased, and the difference reduces the rod pressing force. As a result, the force and energy required for operation can be reduced.

A cap with an opening is detachably attached to the movable passage so as to prevent a filtration member consisting of a perforated plate and a screen from coming off. Reduce to near or near the entrance passage. Therefore, the rod pressing force was small, and the force and energy required for operation could be reduced. In addition, it has become possible to suppress the resin at the edge of the screen and prevent the resin from staying in the passage from the entrance to the screen. Brief explanation of BI side

FIG. 1 is a horizontal sectional view of one embodiment (rotating rod) of the present invention.

FIG. 2 is a sectional view taken along line Y2-Y2 of FIG.

FIG. 3 is an explanatory diagram corresponding to FIG.

FIG. 4 is an explanatory diagram corresponding to FIG.

FIG. 5 is a horizontal sectional view of another embodiment (sliding rod) of the present invention.

Fig. 6 is a sectional view of Fig. 5 © Y6-Y6.

FIG. 7 is an explanatory diagram corresponding to FIG.

FIG. 8 is a sectional view of another embodiment of the screw attachment of the bottomed filtration tube.

FIG. 9 is a cross-sectional view of another embodiment of the screw attachment of the bottomed filter.

FIG. 10 is a cross-sectional view of another embodiment of the bolt mounting of the bottomed filter cylinder.

FIG. 11 is a horizontal cross section of an embodiment in which the bottomed filtration tube is mounted in a fitting manner.

FIG. 12 is a front view of FIG.

FIG. 13 is a sectional view taken along line BB of FIG.

FIG. 14 is a vertical sectional view of an embodiment in which an inlet and an outlet form an angle.

FIG. 15 is a cross-sectional view of an example of a perforated filter member and a screen.

FIG. 16 is an embodiment diagram of bolt mounting corresponding to FIG. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described based on an embodiment shown in the drawings.

1 and 2, a rectangular parallelepiped casing main body 10 is joined to the tip of an extruder cylinder (not shown). The casing body 10 has a rectangular shape when viewed from the front, and a rectangular shape when viewed from the side.

) Is a steel block having a rectangular shape in plan view. Then, a cylindrical rotary rod hole 17 for guiding the rotary rod 2 to rotate around its axis is provided on the center line in the left-right direction of FIG.

The casing main body 10 is provided with an inlet passage 11 and an outlet passage 12 so as to communicate with the pivot rod hole 17 from one outer surface (rear surface) and open to the other outer surface (front surface). An inlet communication passage 13 and an outlet communication passage 14 are provided so as to communicate with the following two movable passages 2a and 2a, respectively. The rotating rod hole 17 has an axial direction (left and right direction in FIG. 1). Two cylindrical rotary rods 2, 2 connected in series are rotatably inserted, and each rotary rod 2 has one circular movable passage 2a penetrating in the diameter direction. At both ends of the pivot rod hole 17, a pair of casing covers (not shown) are attached to the casing body 10, and a pivoting means (not shown) is connected therethrough. A bottomed filter cylinder 20 is inserted into the movable passage 2a.

The bottomed filter cylinder 20 has the bottom side located at the inlet side of the movable passage 2a, and is configured as follows. The reinforced porous cylinder 21 has a straight cylinder (or a tapered cylinder) and is substantially concentric with the center axis of the movable passage 2a, and a cylindrical screen 22 is mounted on the outer periphery (or inner periphery, middle). A bottom member 23 attached to one end of the reinforced multi-hole cylinder 21 with a screw has an outer center convex outward. The guide member 24 has a tapered taper bar shape projecting on the inner axis of the bottom member 23. The flange member 25 has an annular shape provided on the opening side of the perforated cylinder 21, and the portion facing the inner surface of the casing body 1 has a cylindrical surface flush with the outer peripheral surface of the cylindrical rotating rod 2. .

Here, the flange member 25 of the bottomed member 20 is detachably attached to the movable passage 2a of the rotating rod 2 by a screw 25a. The movable passage 2a of the rotary rod 2 is a taper hole extending from the inside toward the inlet 11 to the vicinity of the outer edge of the bottom member 23 of the bottomed filter cylinder 20. However, from the vicinity of the outer edge of the bottom member 23, it matches the entrance passage 11 of the casing or is reduced in the shape of a taper to the vicinity thereof.

The operation state will be described below. In the operating state shown in FIGS. 1 and 2, the resin passes through the inlet passage 11, the inlet communication passage 13, the movable passage 2a, and the screen 22, and then exits from the outlet communication passage 14 and the outlet passage 12. The two movable passages 2a, 2a are always opened in the normal operation state, and the resin flows through both movable passages 2a, 2a. .

Then, when one of them is clogged, if one of the rotating rods is rotated about 90 degrees, the entrance passage 11 and the movable passage 2a are shut off. Then, the resin exits from the outlet 12 through the movable passage 2 a of the rotating rod 2.

Now, FIG. 3 shows an abbreviated view of FIG. 2, and FIG. 4 shows a state in which the flange member 25 is inserted in a free state without screws, and the diameter of the main part is determined as shown in FIG. The comparison of the rod pressing force of the above is shown below with a calculation example. Here, the symbols shown in Figs. 3 and 4 are defined as follows. dd ₂ is the diameter of inlet passage 11 and outlet passage 12, respectively.

d 0 is the diameter of the movable passage 2 a on the flange 25 side.

pi and p ₂ are the inlet and outlet pressures of the fluid, respectively.

(A) Non-fixed type

The filter tube 20 is inserted into the movable rod 2 and is in a free state. The force P against which the filter tube is pressed against the casing 10 by the inlet pressure Pi is

Ρ = (ττ / 4-d ₀ ² xpi)-(ττ / 4-d ₂ ² xp ₂ ) Ρι> ρ _ζ , d ₀ > d ₂ (B)

The filter cylinder 20 is fixedly integrated with the movable rod 2 with screws 25a. The force Ρ 'that the filter cylinder and movable rod press against the casing is

Ρ '= (π / 4-d! ² xpi)-ίπ / Α-d ₂ ² xp ₂ ) P i> P 2, di <d _0, so P— P' = π / Α-Pi (d ₀ ² -di ² )> 0

Calculation example

cm di S cm,

Ρ-Ρ '= 7Γ / 4Χ 150 (64-25) = 5.46xl0 ⁴ -0.96 10 N

= 4.5 x 10 ⁴ N

That is, the pressing force of (B) fixed type is smaller than (A) non-fixed type by (4.5 × 10 ⁴ N). Thus, it can be seen that when the flange member 25 of the present invention is fixed to the movable rod 2, the rod pressing force is significantly reduced as compared to the case where the flange member 25 is not fixed.

5 and 6, a driving rod 2 is applied in place of the rotating rod 2 as another embodiment. That is, a sliding rod hole 17 penetrates the resin passages 11 and 12 of the casing body 10 at right angles, and a cylindrical (or plate-shaped) sliding rod 2 is slid by a hydraulic piston cylinder mechanism (not shown). It is movable (left and right in the figure). A plurality of (two in the figure) movable passages 2a penetrate the sliding rod 2 on a straight line passing through the diameter of the rod, and are provided at intervals in the rod length direction.

A bottomed filter cylinder 20 is detachably attached to the passage 2a with a screw 25a. At the outlet of the perforated tube 21, the inner diameter is enlarged from the inside toward the outlet in a tapered shape, and the casing outlet 12. is a straight cylindrical hole having a diameter corresponding to this. The distance between the adjacent movable passages 2a, 2a of the sliding rod 2 is set so that one is opened before the other is closed. Other parts are the same as in FIGS.

The operation state will be described above. In the operation state shown in FIG. 5, the resin enters through the inlet passage 11, passes through the movable passage 2a, passes through the screen 22 and the perforated tube 21 from the outside of the bottomed filtration tube 20, enters the inside, and is guided to the guide member 24. Get out of Exit 12 while being. When the screen 22 is clogged with foreign matter, the sliding bar 2 is moved to the left by a reciprocating means (piston cylinder mechanism) to switch to a new screen 22. During this movement, the two movable passages 2a are simultaneously opened into the entrance, the exits 11 and 12, and the resin passes through both the screens 22 to the temple B. Therefore, the resin passage is not completely closed.

FIG. 7 is an abbreviated view of FIG. 6, and the diameter of the main part is determined as shown. In the figure, the inlet side of the movable passage 2a is tapered (d) toward the inlet 11. At the outlet side of the fluid, at the outlet of the perforated cylinder 21, the inner diameter (d ₂ ) is expanded from the inside toward the outlet in the form of a taper (d ₂ ′), and the casing's outlet 12 corresponds to this. You It is a straight cylindrical hole with a diameter d ₂ ′.

Table 1 shows a comparison of calculated values using actual numerical examples (dimension units in mm) in this case. In the prior art, the diameter of the movable passage 2 on the inlet side ^ = 125 (mm) and the diameter of the outlet 12 d ₂ = 70, whereas in the present invention, e ′ = 70 and d ₂ ′ = 85. Then, when pt-SOMPa, p ₂ = 1 OMPa, it can be seen that the mouth compression force is about 1/10 and the mouth rotation and sliding force are about 1Z10; ^

【table 1】

As described above, since the inlet side of the movable passage 2a is reduced in a tapered shape toward the inlet 11, the pressure receiving area at the inlet portion is reduced, and the casing outlet 12 is tapered toward the outlet. Because of the expansion, the pressure receiving area at the outlet will be increased. As a result, the rod pressing force at the entrance is reduced, and the rod repulsion at the outlet is increased, and the rod pressing force is reduced due to the difference. Conventionally, the rotating rod was turned or the sliding rod was slid by hydraulic pressure. However, the rotation of the gear and lever, or the use of a screw and lever, did not stop the extruder. Can be moved manually. This significantly reduces costs.

The screen 22 may be attached to the inner periphery of the perforated tube 21 or between the perforated tube 21 and a second reinforcing perforated tube (not shown).

FIG. 8 shows an embodiment in which a screw 21a provided on the flange 25 side of the perforated cylinder 21 is detachable. In FIG. 9, the flange 25 is omitted, and is attached with a screw 21 a provided on the outlet side (the opposite bottom side) of the perforated cylinder 21. Fig. 10 shows Bonoreto 6 force This is an embodiment in which the movable rod 2 is attached to the movable rod 2 through the flange 25.

In FIGS. 11, 12, and 13, as a detachable embodiment, a protrusion 25 b is provided in the radial direction on the outer periphery of the flange 25 (outer periphery of the outlet of the perforated cylinder). The fitting groove 2 is an outlet of the movable passage 2a, and is provided in the circumferential direction from the axial direction. Then, after the protrusion 25 b is fitted into the axial portion of the groove 2 b, the flange 25 (porous cylinder 21) is rotated around the axis, and the protrusion 25 b is Fits in the circumferential part of b. As a result, the filter cylinder 20 is prevented from moving in the axial direction. The rotation drive rod 7 is fixed concentrically to the center of the end face of the rotation rod 2. The movable passage 2a is a tapered hole expanding toward the fluid inlet.

FIG. 14 shows an embodiment in which the inlet 11 and the outlet 12 are deflected by a certain angle (approximately 90 degrees in the drawing) in the same plane. In this case, the second movable passage 2 a ′ extends in the circumferential direction around the outer periphery of the cylindrical movable rod 2, and communicates with the entrance side of the movable passage 2 a within a range of about 90 degrees from the casing entrance 11. The movable passage 2 a penetrating the diameter of the movable rod 2 is a tapered hole extending from the outlet 12 to the inlet side to the outer periphery of the movable rod 2.

FIG. 15 shows another embodiment of the present invention, in which a perforated plate 3 and a screen 4 are used as a filtering member. In this case, a cap 5 with an opening is attached with a screw to reduce the entrance side of the movable passage 2a. That is, the movable passage 2a has a circular cross section, and has a large diameter portion on the fluid inlet side, a middle diameter portion via a step on the outlet side, and a small diameter portion reduced in a taper shape. . Then, the perforated plate 3 and the screen 4 are inserted into the middle diameter portion, and the cap 5 with an opening is detachably attached to the large diameter portion by screws 5b.

Here, the cap 5 with an opening has a concentric annular shape at the center of the movable passage 2 a, the screen 4 side is a flat surface, and the fluid inlet 11 side is an outer circumferential surface of the cylindrical rotating rod 2. It has a uniform cylindrical surface. The opening 5a is tapered from the vicinity of the outer edge of the screen 4 to the entrance 11 so as to coincide with the entrance passage 11 of the casing or to the vicinity thereof. The cap 5 has a role of holding down the end of the screen 4 and a role of preventing resin from remaining in the passage from the entrance to the screen 4.

As shown in Fig. 15, symbols and dimensions (mm) are determined, and P i = 2 O MP a, p ₂ = l O MP a , d! = 35, d ₂ = 35, do (diameter of the perforated plate 3) Table 2 shows the calculated values based on actual numerical examples when 2 is 70. From this, the force with cap 5 is about 14% of the pressing force without cap 5. Here, for the sake of calculation, the effects of the holes in the perforated plate 3 and the ί start of the screen 4 were ignored.

[Table 2]

FIG. 16 shows an embodiment in which the cap 5 is attached by bolts 6 penetrating the cap instead of screws. In addition, as shown in the phantom line in FIG. 15, in the example of mounting by the fitting means, similarly to FIGS. A groove 2c into which this fits is provided in the movable rod 2.

The compact type of the present invention can be operated manually at a pressure of 35 MPa for a small type and 15 MPa for a large machine, making it the industry's first breakthrough product. It can be applied from a small machine with an extrusion amount of 10 kg / h to a very large machine with an extrusion amount of 6000 kg / h. Industrial applicability

Applicable to screen changer for fluid of molten synthetic resin

Claims

1. a casing body having a movable rod hole for guiding a movable rod in a column shape so as to be movable, and having an entrance passage and an exit passage penetrating the rod hole; and a casing body movably inserted into the movable rod hole. A movable rod having a movable passage, and a bottomed filtration tube inserted into the movable passage,

Contract

The bottomed filter tube has a reinforced porous tube, a screen stretched on the outer periphery or inner periphery or in the middle thereof, and a bottom member provided at one end thereof. On the entrance side

In what was introduced and placed,

The opposite bottom side of the bottomed filtration tube is detachably attached to a movable passage.

0

Fluid screen changer.

2. The movable passage of the movable rod is directed from the inside to the inlet passage, and is reduced from the vicinity of the outer edge of the bottom member of the bottomed filter tube to the inlet passage of the casing or to the vicinity thereof. The fluid screen changer according to claim 1, wherein

3. The bottomed filter tube has an inner diameter that is enlarged from the inside toward the outlet at the outlet side of the fluid, and the casing outlet passage is a straight cylindrical hole having a diameter corresponding to this.

3. The screen changer for a fluid according to claim 1, wherein:

4. A casing body having a movable rod hole for guiding the movable rod so as to be movable, and having a casing having an entrance passage and an exit passage penetrating the rod hole, and a movable passage inserted movably into the movable rod hole. A movable member having a filter member comprising a perforated plate and a screen inserted into the movable passage,

A cap with an opening is detachably attached to the movable passage so as to prevent the filter member from coming off.The opening of the cap with the opening is directed from the inside to the inlet passage, and coincides with the inlet passage of the casing. A screen changer for fluids, characterized in that it is reduced to the vicinity.