JP2000254550A - Fixation apparatus for casing cover for centrifugal filtration apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixation apparatus for a casing cover for a centrifugal filtration apparatus which can carry out opening and closing operation in a short time and can sufficiently deal with a casing cover even in the conditions requiring tightness to extremely high extent without causing seal leakage. SOLUTION: This fixation apparatus for a casing cover for a centrifugal filtration apparatus to fix a plate in a rear part in a driving side of a centrifugal filtration apparatus and a casing cover of a rotation basket comprises a span ring 1 having a recessed groove along the inner circumference as to pinch and fasten a flange part 9 of the casing cover in which a dovetail groove is formed and a projected flange part formed in a side groove of the rear part plate 8 in the driving side of the centrifugal filtration apparatus, a spacer 3 for adjusting the fastening pressure, levers 5 and 5' having one ends engaged with the span ring 1 in a lower part of the span ring 1, the other ends engaged with a freely rotatable rotation axis and shapes to be interlocked with the rotation shaft, and a driving means for freely rotating the rotation shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a casing cover fixing device, and more particularly to a casing cover fixing device used for a centrifugal filter or the like.

[0002]

2. Description of the Related Art A centrifugal filter has a high separation performance under a high centrifugal force, a cake having a uniform liquid content and a uniform washing effect can be obtained, and a filter having a front open door is used for changing a filter medium and inspecting the inside of the machine. Since it has advantages such as good properties, it is used in many fields such as the chemical industry, the food industry, the pharmaceutical industry, and the like. A conventional centrifugal filter will be described with reference to FIG. The undiluted slurry to be processed passes through the liquid supply pipe 101,
A predetermined amount is supplied into the rotating basket 100 by the driving device 109 driven by the electric motor 110.
The liquid component passes through the filter medium 108 by the action of centrifugal force, enters the casing cover 103 through the liquid passage hole 102, and is discharged out of the apparatus from a filtrate discharge port (not shown).

On the other hand, the solid content remains on the filter medium 108 and forms a cake layer C as the filtration proceeds. When the cake layer C reaches a predetermined thickness, the scraping arm 104 is pivoted outward in the radial direction of the basket 100 by the hydraulic cylinder,
The scraping knife 105 attached to the tip is pressed against the cake layer C to scrape the cake to the discharge chute 107 directly below the scraping arm 104. The scraped cake C is in the form of a powder and is discharged through the discharge chute 107 to the outside of the machine.

However, in recent years, the PL law (product liability law) has been enforced in the food industry and the pharmaceutical industry,
There is a demand for a manufacturing facility that can support a CP (Hazard Analysis Important Control Point) system and a GMP (Standards for manufacturing control and quality control of pharmaceuticals).

[0005]

Under such circumstances, the centrifugal filter is required not to have the conventional structure but to satisfy these requirements. However,
A conventional method of fixing the casing cover 103 for a centrifugal filter is a method of fixing the flanges together by using bolts and nuts, or, as shown in FIG. 1
13 and the side groove provided on the outer periphery of the casing front plate 106 through the eye bolt 114 of the clamp 112,
Because the screw was tightened and fixed by a clamp on the front door 113 side, It takes time to tighten. (The longer the working time in the clean room, the more pollutants are generated from the human body.) 2. Since the centrifugal filter is a dynamic machine, the tightening bolts and nuts may be loosened due to vibration or the like, which may cause the bolts and nuts to fall off and seals to leak. (This causes problems of contamination of the product and contamination of the clean room.) 3. Since the tightening torque is not constant, seal leakage is likely to occur. (Causes clean room contamination problems.) 4. Insufficient surface pressure between the tightened bolts may cause seal leakage. (Causes clean room contamination problems.) And other operational problems. Also, the casing cover 1
03, as shown in FIG.
03 and the rear plate 1 provided on the drive side of the centrifugal filter
Since No. 11 had a welded-in structure, the cleanability inside the centrifugal filter was poor, and it could not be applied to food industry and pharmaceutical use. The present invention has been made in order to solve the above-mentioned problems, and the opening and closing operation of a casing cover can be performed in a short time, there is no seal leakage, and it can be sufficiently used even under a highly sealed condition. An object of the present invention is to provide a device for fixing a casing cover for a centrifugal filter that is possible.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problem, the gist of the present invention is to fix a drive side rear plate of a centrifugal filter and a casing cover of the rotating basket. In the fixing device for a casing cover for a centrifugal filter, a flange portion of the casing cover provided with a dovetail groove and a projecting flange portion provided in a side groove of a drive-side rear plate of the centrifugal filter are sandwiched. A span ring having a concave groove along its circumference, a spacer for being clamped by a bracket of the span ring and adjusting a tightening force, and a lower end of the span ring, one end of which is stopped by the span ring, and the other end of which is fixed. A lever that is stopped by a rotatable rotation shaft and engages with the rotation shaft; and a driving unit that rotatably rotates the rotation shaft. , By the rotation direction of the rotating shaft is characterized in that it has been configured to be freely engaged and separated. By providing an annular span ring having a groove driven by a hydraulic motor in the vicinity of the periphery of the flange of the casing cover of the centrifugal filter, the casing cover can be opened and closed in a short time, and evenly from the periphery Seal leakage is eliminated because it can be pinched.

The gist of the present invention is that the tightening force of the span ring can be adjusted by adjusting the length of the spacer.
3. A fixing device for a casing cover for a centrifugal filter according to item 1. Since the spacer can be inserted between the brackets of the span ring, the tightening force of the span ring can be adjusted by changing the length of the spacer.

According to a third aspect of the present invention, there is provided the centrifugal filter casing cover fixing device according to the first or second aspect, wherein the driving means is a hydraulic motor. By using a hydraulic motor, the opening and closing time of the span ring can be shortened and the amount of substances such as dust contaminating the clean room can be reduced.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A fixing device for a casing cover for a centrifugal filter according to the present invention will be described with reference to the drawings. FIG. 1 is a front view of the entire fixing device for a casing cover for a centrifugal filter according to the present invention, and FIG. 2A is an upper view of the fixing device for a casing cover for a centrifugal filter according to the present invention when the fixing device is in a closed state. FIG. 2B is an upper and lower front view when the fixing device of the casing cover for a centrifugal filter according to the present invention is in an open state, and FIG. 3A is a centrifugal filter according to the present invention. Sectional view of the upper part of the fixing device for the casing cover for the vehicle, FIG.
(B) is a lower sectional view of a fixing device for a casing cover for a centrifugal filter according to the present invention, and FIG. 4 is a side sectional view of the entire centrifugal filter equipped with the fixing device for a casing cover for a centrifugal filter according to the present invention. FIG.

The overall structure of a centrifugal filter according to the present invention will be described with reference to FIG. The centrifugal filter includes an electric motor 29, a driving device 28 for transmitting the power of the electric motor 29 to the basket 20 and rotating the same, the basket 20 for centrifugally filtering the slurry, and a liquid supply pipe 21 for supplying the slurry to the basket 20. The main part is composed of a scraping knife 25 for scraping the filter cake C formed in the basket 20 and a cake chute 26 for discharging the powder scraped by the scraping knife 25 to the outside. Is done. As casings surrounding these main parts from the outside, there are a casing cover 24 of the basket 20 and a cover provided on the centrifugal filter driving side, and provided on the flange portion 9 of the casing cover 24 and the centrifugal filter driving side. The projection flange 9 'provided in the side groove 18 of the rear plate 8 is sandwiched by the casing cover fixing device 11 for a centrifugal filter according to the present invention shown in FIG.

Next, the operation of the centrifugal filter according to the present invention will be described. The undiluted slurry to be processed passes through a liquid supply pipe 21 and is driven by a motor 2 driven by an electric motor 29.
8 feeds a predetermined amount into the rotating basket 20. The liquid component passes through the filter medium 22 by the action of centrifugal force, enters the casing 24, and is discharged out of the apparatus from a filtrate discharge port (not shown).

On the other hand, the solid content remains on the filter medium 22 and forms a cake layer C as the filtration proceeds. When the cake layer C reaches a predetermined thickness, the scraping arm 27 is pivoted outward in the radial direction of the basket by a hydraulic cylinder, and the scraping knife 25 attached to the tip is pressed against the cake layer C to make a cake. Is scraped off to a discharge chute 26 directly below the scraping arm 27, and the scraped cake is turned into a powdery form and transmitted through the discharge chute 26 to be discharged outside the machine.

As shown in FIGS. 1 and 3, a fixing device 11 for a casing cover for a centrifugal filter according to the present invention includes a flange portion 9 of a casing cover 24 and a rear plate 8 provided on a driving side of the centrifugal filter. A span ring 1 having a concave groove 1A along an inner periphery thereof, the span ring 1 straddling a projecting flange portion 9 'provided in a side groove 18 of the same.
Spacer 3 provided on the upper part of the
And a pair of semicircular levers 5, 5 ', one end of which is fixed to the span ring 1 and the other end of which is fixed to a rotatable rotating shaft 10, and the rotating shaft 10 A main part is constituted by the driving means 12 for rotatably rotating.

As shown in FIG. 1, the span ring 1 has an annular shape in a front view. As shown in FIG. 3, a trapezoidal concave groove 1 </ b> A having a trapezoidal upper base on the outer peripheral side is provided on the inner peripheral side. The spun ring 1 has a dovetail groove 17
The dovetail groove 17 is loaded with an O-ring 16 and the casing cover flange 9 having the groove 9 and the protruding flange 9 ′ provided inside the side groove 18 of the rear plate 8 are inserted from the outside by the trapezoidal groove 1 </ b> A. It is for tightening and fixing uniformly along the circumference. Brackets 3A and 3A 'are fixed to both ends of the span ring 1, respectively. As shown in FIGS. 2 and 4, the brackets 3A and 3A 'are provided with two hollow holes having a circular diameter for inserting the studs 2 and 2'. Further, a protective cover 6 is provided so that an operator may not be hurt by a finger or the like being caught in the driving means 12 provided below the fixing device 11 of the casing cover for the centrifugal filter.

The spacer 3 is a member having two circular holes provided at the uppermost portion of the span ring 1 and is inserted between the brackets 3A and 3A 'of the span ring 1. As will be described later, it is a member for adjusting the tightening force of the span ring 1 by changing its length.
The spacer 3 can be attached by inserting the studs 2, 2 'provided with screw portions at both ends into the holes of the brackets 3A, 3A' and the spacers 3 so that the studs 2, 2 'are inserted into four holes. The nut 3 allows the bracket 3
The studs 2 and 2 'are attached by tightening the studs 2 and 2' at the left and right ends of A and 3A '. When removing,
The reverse operation of the above operation is performed. The method for adjusting the tightening force of the span ring 1 is as follows.
When the length of the span ring 1 is increased, the entire length of the span ring 1 is increased, so that the tightening force of the casing cover 24 is reduced. Conversely, when the length of the spacer 3 is shortened, the tightening force of the casing cover 24 increases. A plurality of spacers 3 having different lengths are prepared in advance, and an optimum tightening force can be obtained by appropriately changing the length of the spacers 3 to be inserted into the bracket. As a result, there is no seal leakage.

As shown in FIG. 2 (b), the levers 5, 5 'are provided below the span ring 1, one end of which is rotatably supported by the span ring 1 by a pin, and the other end of which is rotated. The shaft 10 is rotatably supported by a pin, and has a pair of semicircular arc shapes that can be engaged with and separated from the rotating shaft 10. When the casing cover 24 is rotated to the right by 180 degrees when viewed from the front side, the ends of the levers 5 and 5 'pivotally supported by the span ring 1 push the span ring 1 open as shown in FIG. As a result, the casing cover 24 of the centrifugal filter can be opened. On the other hand, when the casing cover 24 is fixed to the rear plate 8 provided on the drive side of the centrifugal filter, when the rotating shaft 10 is rotated to the left by 180 degrees as viewed from the front, a pivot is provided on the span ring 1 side. Since the end portions of the levers 5 and 5 'act to close the span ring 1, the casing cover 24 of the centrifugal filter can be fixed.

The driving means 12 is a hydraulic gear motor (gear motor) as shown in FIG. 3 (b), and when pressure oil enters, the pressure oil acts between the casing and the gear to rotate.
By changing the direction in which the oil flows through the pipes 12A and 12A ', the rotation direction of the rotating shaft 10 can be changed, and the rotational force can be changed by the oil pressure. Rotary actuator 1 that converts fluid energy of oil to mechanical rotational energy
Rotate 2B. The levers 5, 5 'rotatably supported by the rotary actuator 12B via pins rotate so that the span ring 1 can be opened and closed. By using the high-pressure hydraulic drive means, the opening / closing time can be shortened and the amount of pollutants generated in the clean room can be reduced. On the other hand, when using the pneumatic drive means, the pressure cannot be high due to the regulations of the High Pressure Gas Control Law. When using an electric drive means, there is a limit to shortening the opening and closing time because a mechanical mechanism is used. Furthermore, when the electric driving means is used, the amount of dust and the like generated is larger than that of the hydraulic type, so that the clean room is easily contaminated. There are problems such as.

The fixing device 11 for the casing cover for a centrifugal filter according to the present invention is not limited to a horizontal centrifugal filter as shown in FIG. 4, but can also be used for a vertical centrifugal filter. . Further, it can be used for a general centrifuge.

[0019]

According to the present invention having the above configuration and operation, 1) the opening and closing operation of the casing cover can be performed in a short time, and labor can be saved. 2) Since the spun ring uniformly tightens and seals over the entire circumference, there is no leakage at the seal portion. 3) It can sufficiently cope with conditions requiring a high degree of hermeticity, such as when it is installed in a clean room, reducing the frequency of contamination and improving the operation rate.

[Brief description of the drawings]

FIG. 1 is a front view of an entire fixing device for a casing cover for a centrifugal filter according to the present invention.

FIG. 2 (a) is an upper / lower front view of the centrifugal filter casing cover fixing device according to the present invention in a closed state. (B) It is an upper / lower front view when the fixing device of the casing cover for the centrifugal filter according to the present invention is in an open state.

FIG. 3 (a) is a top sectional view of a fixing device for a casing cover for a centrifugal filter according to the present invention. (B) It is a lower sectional view of the fixing device of the casing cover for centrifugal filters concerning the present invention.

FIG. 4 is a side sectional view of the entire centrifugal filter equipped with the fixing device for a casing cover for a centrifugal filter according to the present invention.

FIG. 5 is a side sectional view of an entire centrifugal filter equipped with a conventional casing cover for a centrifugal filter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spun ring 2, 2 'Stud 3 Spacer 3A, 3A' bracket 4 Cap nut 5, 5 'Lever 6 Protective cover 7 Bolt 8 Rear plate 9 Casing cover flange 10 Rotating shaft 11 Fixing casing cover for centrifugal filter Apparatus 12 Driving means 12A, 12A 'Piping 12B Rotary actuator 12C, 12C' Bolt 13 Bolt 14 Washer with claw 15 Nut 16 O-ring 17 Dovetail groove 18 Side groove 24 Casing cover

Claims (3)

[Claims] 1. A fixing device for a casing cover for a centrifugal filter for fixing a rear plate on a drive side of a centrifugal filter and a casing cover of the rotary basket, wherein a flange portion of the casing cover provided with a dovetail groove; A span ring having a concave groove along the inner periphery for striking a projecting flange portion provided in a side groove of a drive-side rear plate of a centrifugal filter; and being clamped by a bracket of the span ring to adjust a tightening force. A spacer having one end fixed to the span ring and the other end fixed to a rotatable rotating shaft at a lower portion of the span ring, and a lever engaged with the rotating shaft. Centrifugal filtration, comprising: a driving means for rotatably rotating a moving shaft; and being configured to be capable of engaging and disengaging according to the rotation direction of the rotating shaft. Fixing devices use the casing cover. 2. The fixing device for a casing cover for a centrifugal filter according to claim 1, wherein the tightening force of the span ring can be adjusted by adjusting the length of the spacer. 3. The fixing device for a casing cover for a centrifugal filter according to claim 1, wherein the driving means is a hydraulic motor.