JP5405367B2 - Scraper and fluid filtration or transfer device equipped with a scraper - Google Patents

Description

  The present invention relates to a scraper used in a rotary blade for transferring various fluids and mainly filtering juice extraction fluid such as food, and a scraper structure fluid filtering or transferring device.

  In general, a scraper must be attached to the spiral blade of a screw of various transfer devices, and must be operated without causing fluid leakage by sliding on the inner periphery of the outer cylinder by a rotating action when transferring various fluids.

  It is known that a long linear scraper piece is provided on the outer peripheral end face of the spiral blade (see, for example, Patent Document 1). Leakage occurs, airtightness is lost, and transfer becomes impossible.

  On the other hand, the scraper piece is divided into a structure that can be moved by using the automatic lifting means without using a spring member. A scraper that can be avoided is also known (see, for example, Patent Document 2).

Japanese Patent No. 2551480 JP 2007-296441 A

  However, since the scraper piece has a divided structure, there is a problem that work for attaching and detaching to / from the spiral blade is troublesome.

  The present invention has been made paying attention to the above points, and an inclined surface (tapered surface) is formed over the entire insertion mounting groove of the scraper piece, or an inclined surface ( A taper surface) is placed on the inclined surface, and a long scraper piece having an opposite inclined surface is formed on the inclined surface to form an automatic lifting mechanism capable of sliding on the inclined surface. An object of the present invention is to provide a scraper and a fluid filtration or transfer device equipped with a scraper capable of performing a sliding action without pressure leakage by automatically moving a scraper piece along an inclined surface. And

  The present invention can solve the above problems by providing the following configuration.

(1) A spiral blade scraper used for filtration or transfer by a screw having a spiral blade rotating along the inner periphery of an outer cylinder,
The outer periphery of the spiral blade is not in contact with the inner periphery of the outer cylinder, a groove is provided in the entire outer peripheral end surface of the spiral blade, and the bottom surface of the groove is gradually increased from the rear toward the front. An angled fixed inclined surface, and one scraper piece across the entire area having the opposite inclined surface on the inclined surface is brought into sliding contact with the inner periphery of the outer cylinder, and automatically along the fixed inclined surface. A scraper characterized in that it is provided with an automatic hoisting mechanism for moving it.
(2) The automatic lifting mechanism forms a fixed inclined surface on the bottom surface of the concave groove of the spiral blade, and is configured on the inclined surface and the opposite inclined surface of the scraper piece moving on the inclined surface. The scraper according to (1) above, wherein
(3) In the automatic lifting mechanism, the bottom surface of the groove of the spiral blade has the same height, and a fixed plate having a fixed inclined surface at a fixed angle is placed and fixed on the bottom surface. The scraper according to (1), characterized in that the scraper is composed of an inclined surface opposite to the scraper piece moving on the surface.
(4) A fluid filtration or transfer device comprising the scraper according to any one of (1) to (3).

  According to the present invention, the fluid to be transferred can be transferred or filtered while being effectively transferred or filtered by the spiral blade, which is operated by the rotational action of the screw, and the scraper piece that is in sliding contact with the inner periphery of the outer cylinder is used frequently. However, even if the scraper piece height is reduced due to wear, the scraper piece is lifted by the automatic lifting mechanism with an inclined surface, and the sliding contact surface of the scraper piece is always raised. There is no risk of leakage between the inner periphery of the cylinder.

  And since the scraper piece is one with respect to the concave groove, workability such as attachment and replacement can be performed in a single time, which is efficient.

  In addition, since the automatic lifting mechanism is composed only of an inclined surface, it is formed on the bottom of the concave groove itself, but it can be formed simply by placing and fixing an abutting plate having an inclined surface.

Sectional drawing which expands and shows a part of use condition of the scraper which shows one Example of this invention Cross-sectional explanatory drawing divided into three in a state where the scraper of FIG. Sectional drawing which expands and shows a part of use condition of the scraper which shows another example Cross-sectional explanatory drawing divided into three in a state where the scraper of FIG. (A) is the Va-Va line expanded sectional view of FIG. 1, (b) is the Vb-Vb line enlarged sectional view of FIG. Cross-sectional explanatory drawing when the scraper of the present invention is used in a filtration device

  An embodiment of the present invention will be described below with reference to the drawings.

  This embodiment shows a case where a so-called screw is used. For example, the outer cylinder 1 for filtration or transfer as shown in FIG. 1 shows a configuration in which a screw 2 for transferring a fluid from a supply port IN to a discharge port OUT is disposed in an outer cylinder 1, and the outer cylinder 1 is used as a filtering device if a filtering hole is provided as shown. If it is a non-porous outer cylinder, it can be used as a transfer device for plastics.

  In the drawing, although it is in the horizontal direction, it may be in the vertical direction.

  Furthermore, although the outer cylinder 1 has a cylindrical structure, it can be used with a favorite structure such as a conical cone structure.

  The screw 2 is provided with a spiral blade 3 on the outer periphery thereof in a spiral shape with a necessary unequal or equal pitch and with a desired number of hooks, and maintains a small gap with the inner periphery of the outer tube 1. The scraper piece A is engaged in the concave groove 4 provided on the outer periphery, and the outer peripheral surface a of the scraper piece A can always slide with the inner peripheral surface of the outer cylinder 1.

  Reference numeral 5 denotes an inclined surface having a constant angle θ formed at the bottom of the concave groove 4 and is formed as a fixed inclined surface having a constant angle that gradually rises from the rear to the top of the spiral blade 3.

  Reference numeral 6 denotes an inclined surface opposite to the scraper piece A that moves and rises on the inclined surface 5, and includes an automatic lifting mechanism X between the inclined surface 5.

  That is, when the fluid to be transferred in the outer cylinder 1 is transferred by the rotational action of the screw 2, the wear is caused by the sliding of the outer peripheral surface a of the scraper piece A provided on the spiral blade 3 with the inner peripheral surface of the outer cylinder 1. In the spiral piece A, the opposite inclined surface 6 of the automatic lifting mechanism X slides and rises on the inclined surface 5 formed at the bottom of the concave groove 4, and compensates for the outer peripheral portion damaged by wear. The outer peripheral surface a of the scraper piece A of the spiral blade 3 is in sliding contact with the inner peripheral surface of the outer cylinder 1 so that the fluid to be transferred can be smoothly transferred and filtered or transferred without causing pressure leakage. it can.

  Here, the scraper piece A is preferably a polyamide resin, Teflon (registered trademark) or the like as a relatively strong synthetic resin material, but it should not be particularly limited.

  Here, two examples of specific configurations of the automatic lifting mechanism X will be described with reference to the drawings.

  1, 2, and 5 (a) show a slight constant in a state in which the bottom itself is flatly developed from the front portion to the rear portion over the entire area of the concave groove 4 formed in the spiral blade 3. A fixed inclined surface 5 having an angle θ of 1 ° to 5 ° is formed as a bottom surface configuration, and a scraper piece A having an opposite inclined surface 6 is combined with the inclined surface 5 so as to be movable up and down. It is.

3, 4, and 5 (b) show other configurations. The bottom surface configuration of the groove 4 has the same depth h and a constant depth, whereas the groove 4 divided into upper and lower portions within, a minute constant angle θ is on the inclined surface 5 of the contact plate a ₁ of elongated wear plate a ₁ Toko having an inclined surface 5 of the stationary within 1 ° to 5 ° to the lower fitted scraper piece a having an opposite inclined surface 6 moves upward, it is intended for mounting fixing the wear plate a ₁ on the bottom plate.

  According to the present invention, the scraper piece A that rubs against the inner peripheral surface of the outer cylinder 1 during the rotational transfer of the screw 2 by the action of the automatic hoisting mechanism X by the fixed inclined surface and the opposite inclined surface facing each other. Even if it is worn out, the scraper piece A always moves in the direction of the arrow as shown in the figure, and is automatically lifted up so as not to cause pressure leakage, so that filtration or transfer can be performed smoothly.

DESCRIPTION OF SYMBOLS 1 Outer cylinder 2 Screw 3 Spiral blade 4 Concave groove 5 Inclined surface 6 Opposite inclined surface A Scraper piece A ₁ Contact plate a Outer surface M Drive means X Automatic lifting mechanism h Depth

Claims (4)

A spiral blade scraper used for filtration or transfer by a screw having a spiral blade rotating along the inner periphery of an outer cylinder,
The outer periphery of the spiral blade is not in contact with the inner periphery of the outer cylinder, a groove is provided in the entire outer peripheral end surface of the spiral blade, and the bottom surface of the groove is gradually increased from the rear toward the front. An angled fixed inclined surface, and one scraper piece across the entire area having the opposite inclined surface on the inclined surface is brought into sliding contact with the inner periphery of the outer cylinder, and automatically along the fixed inclined surface. A scraper characterized in that it is provided with an automatic hoisting mechanism for moving it. Said automatic Yuzurihaue mechanism, said forms an inclined surface of the fixed to the bottom surface of the groove of the spiral blade, and the inclined surface, that made by configured on the opposite inclined surfaces of the scraper pieces moving on the inclined surface The scraper as claimed in claim 1. It said automatic Yuzurihaue mechanism, the bottom surface of the groove of the spiral vanes same high Satoshi, the wear plate having an inclined surface of the fixed constant angle on the bottom surface is placed fixed on the inclined surface of the fixed 2. The scraper according to claim 1, wherein the scraper is composed of an inclined surface opposite to the moving scraper piece. Filtration through transfer device of the fluid comprising the scraper according to any one of claims 1 to 3.

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