CN113795322B

CN113795322B - Screen device and processing system

Info

Publication number: CN113795322B
Application number: CN202080033618.1A
Authority: CN
Inventors: 代田博文
Original assignee: Mitsubishi Heavy Industries Environmental and Chemical Engineering Co Ltd
Current assignee: Mitsubishi Heavy Industries Environmental and Chemical Engineering Co Ltd
Priority date: 2019-07-19
Filing date: 2020-07-20
Publication date: 2022-12-06
Anticipated expiration: 2040-07-20
Also published as: WO2021015173A1; KR20210149787A; CN113795322A; TWI753498B; JP6688931B1; JP2021016828A; TW202112426A

Abstract

The screen device of the present invention comprises: a first wire rod and a second wire rod which are provided with a screen surface supplied with a processed object and are arranged in a straight line shape with the central axes thereof kept parallel; a first locking portion that movably locks one end of each of the first wire and the second wire; a second locking portion that movably locks the other end of each of the first wire rod and the second wire rod; and control means for controlling an interval of the respective one ends, i.e., a first interval, and the control means may change the first interval to be larger than an interval of the respective other ends, i.e., a second interval.

Description

Screen device and processing system

Technical Field

The invention relates to a screen device and a processing system.

Background

In a sieve device used for various purposes such as solid-liquid separation and classification, sieve holes (i.e., gaps and spaces between adjacent wire rods) are formed to prevent passage of substances having a predetermined size or more contained in an object to be treated, and to allow passage of only substances having a size smaller than the predetermined size or to allow passage of only a predetermined amount of the object to be treated. In addition, in the screen device, not only a device in which the size of the screen hole is fixed but also a device in which the size of the screen hole can be changed has been developed.

For example: the device disclosed in patent document 1 includes: the size of the screen mesh can be changed by sliding the movable side screen member.

Further, patent document 2 discloses a device in which a wire material wound in a coil spring is stretched to increase the interval between adjacent wire materials, that is, a device capable of changing the size of a screen hole.

Prior art documents

Patent document

Patent document 1: japanese patent laid-open publication No. 10-235293

Patent document 2: japanese patent No. 6458962

Disclosure of Invention

Technical problem to be solved by the invention

However, although the screen devices disclosed in patent documents 1 and 2 can vary the size of the screen holes, the screen holes in each place have the same size. Therefore, for example, when the undersize product is required to be classified into a plurality of stages, if only one type of screen device is used, the screen device cannot be used, and a plurality of types of screen devices must be used. Therefore, the cost required for the application may be increased.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a screen device and a processing system using the screen device, which can control the size of the screen holes in one screen device to be different in order in the longitudinal direction of the screen device, with a simple configuration.

Means for solving the technical problem

The screen apparatus of the present invention and the first aspect of the screen apparatus in the processing system of the present invention include: a first wire and a second wire which are provided with a screen surface supplied with a processed object and are arranged in a straight line shape with their central axes parallel to each other; a first locking portion that movably locks one end of each of the first wire rod and the second wire rod; a second locking portion that movably locks the other end of each of the first and second wire members; a control device for controlling a first interval, which is an interval of the respective one ends; and a sliding portion that presses the first wire and the second wire at the respective one ends. The control device may change the first interval to a second interval that is larger than an interval of the other end of each of the first and second wires, the first and second wires may have a shape that becomes thinner as the first and second wires are farther from the screen surface in a vertical direction in a cross section orthogonal to the screen surface, and the sliding portion may have a rod-shaped first sliding portion disposed between the first and second wires in the cross section. The control device may change the first interval to be larger than the second interval by advancing the first sliding portion toward the screen surface and in the vertical direction.

The second aspect of the screen device of the present invention and the screen device in the processing system of the present invention includes: a first wire and a second wire which are provided with a screen surface supplied with a processed object and are arranged in a straight line shape with their central axes parallel to each other; a first locking portion that movably locks one end of each of the first wire rod and the second wire rod; a second locking portion that movably locks the other end of each of the first and second wire members; a control device for controlling a first interval, which is an interval of the respective one ends; and a sliding portion that presses the first wire and the second wire at the respective one ends. The control device may change the first interval to a second interval larger than the other end interval, and may form a cylindrical body having the screen surface as an inner surface or an outer surface by alternately arranging the first wires and the second wires, and the sliding portion may include a third sliding portion having an upper bottom with an outer diameter smaller than an inner diameter of the cylindrical body and a lower bottom with an outer diameter larger than the inner diameter of the cylindrical body. The control means inserts the third sliding portion from the upper bottom into the cylindrical body, and can change the first interval to be larger than the second interval.

A third aspect of the screen device of the present invention and the screen device in the processing system of the present invention includes: a first wire and a second wire which are provided with a screen surface to which a material to be processed is supplied and are arranged in a straight line shape in which the central axes thereof are parallel to each other; a first locking portion that movably locks one end of each of the first wire rod and the second wire rod; a second locking portion that movably locks the other end of each of the first wire rod and the second wire rod; a control device for controlling a first interval, which is an interval of the respective one ends; and a sliding portion that presses the first wire and the second wire at the respective one ends. The control device may change the first interval to a second interval that is larger than the interval of the other end of each of the first and second wires, and may form a cylindrical body having the screen surface as an inner surface or an outer surface by alternately arranging the first and second wires, wherein the sliding portion includes a fourth sliding portion having a wedge portion that is arranged on an outer periphery of the cylindrical body, limits a change in an inner diameter of the cylindrical body at the one end to a predetermined value or less, and is interposed between the first and second wires. The controller may change the first interval to be larger than the second interval by moving the fourth sliding portion in the axial direction of the cylindrical body to cut the wedge portion between the first wire and the second wire.

Effects of the invention

According to the screen device and the processing system using the screen device of the present invention, both ends of the first wire and the second wire are movably connected to the first locking part or the second locking part, respectively, and the control device can enlarge the first interval, which is the interval between the two wires, at one end of each wire. Therefore, it is possible to provide: the size of the screen holes in one screen device can be controlled to gradually change the screen hole size according to the position thereof in the longitudinal direction of the screen device by using a simple structure, and a processing system using the same.

Drawings

Fig. 1 is a schematic diagram showing a structure of a flat plate-like screen device (having a first sliding portion as a sliding portion) of the first embodiment.

Fig. 2 is a top view of a first embodiment screen assembly.

Fig. 3 is a side view of the screen assembly of the first embodiment as viewed from one end side thereof.

Fig. 4 is a diagram showing a state before and after the screen device of the first embodiment performs the control of expanding the interval between the first wire rod and the second wire rod.

Fig. 5 is a view showing a state before and after the first interval is controlled to be larger than the second interval in the screen apparatus of the first embodiment.

Fig. 6 is a schematic view when viewed from the xz plane for explaining a screen device (having a second sliding portion as a sliding portion) according to a modification of the first embodiment.

Fig. 7 is a schematic view when viewed from the yz plane for explaining a sieve device (having a second slide portion as a slide portion) according to a modification of the first embodiment.

Fig. 8 is a schematic view when viewed from the xy plane for explaining a sieve device (having a second slide portion as a slide portion) according to a modification of the first embodiment.

Fig. 9 is a schematic diagram showing the structure of a cylindrical screen device (having a third sliding portion as a sliding portion) of the second embodiment.

Fig. 10 is a sectional view of a cylindrical body of a screen device of the second embodiment.

Fig. 11 is a diagram showing a state before and after the screen device of the second embodiment performs control for expanding the interval between the first wire rod and the second wire rod.

Fig. 12 is a view showing a state before and after the first interval is controlled to be larger than the second interval in the screen apparatus of the second embodiment.

Fig. 13 is a sectional view showing another example of the cylindrical body of the screen device according to the second embodiment.

Fig. 14 is a schematic diagram showing a configuration of a processing system of application example 1.

Fig. 15 is a schematic diagram showing the configuration of the processing system of application example 2.

Fig. 16 is a schematic diagram showing the configuration of a processing system of application example 3.

Fig. 17 is a schematic diagram showing the configuration of the processing system of application example 4.

Detailed Description

Hereinafter, embodiments of a screen device and a processing system using the screen device according to the present invention will be described with reference to the drawings.

< first embodiment >

(Flat plate-shaped Screen device having first sliding part)

A screen device 1A according to a first embodiment will be described with reference to fig. 1 to 5. In the following description, the xyz rectangular coordinates shown in the drawings will be used for description. In the following description, the direction of the x-axis is referred to as "x-direction"; the direction of the y-axis is referred to as the "y-direction"; the direction of the z-axis is referred to as "z-direction". The z direction in fig. 1 to 5 is a vertical direction, and the direction indicated by the arrow on the z axis is an upward direction (i.e., a direction opposite to the direction in which gravity acts).

The screen device 1A is a flat plate-like shape in which a plurality of linear wires 2 such as wedge wires are regularly arranged on the same plane as in a "bamboo curtain" for example. Here, the y direction is defined as the longitudinal direction of each wire 2, and the central axes C of the wires 2 are regularly arranged in the x direction while being parallel to each other. Further, among the plurality of wires 2, one of two adjacent wires 2 is referred to as a first wire 2a; the other is referred to as a second wire 2b.

The first wire 2a and the second wire 2b are disposed so that the central axes C thereof are separated by a predetermined distance in the x direction, and a gap is formed between the first wire 2a and the second wire 2b. The predetermined distance in the x direction of each center axis C of the first wire 2a and the second wire 2b is set according to the application. In fig. 1 to 3 and 5, the adjacent wires 2 appear to be in contact with each other without any gap. However, this is because, in the examples shown in these figures, the adjacent wires 2 have only a slight gap of about several mm between each other, and therefore the gap is not visible. Actually, the wires 2 adjacent to each other are not in contact with each other in principle, except for the example described later.

The wire 2 has a flat surface, i.e. a screening surface S. The screen surfaces S of the wires 2 are not shifted from each other in the z direction and are arranged on the same plane. One plate-like movement restricting portion 3 is disposed across each wire 2, for example, so as to restrict the movement of each wire 2 so that the screen surfaces S of the wires 2 are not displaced from each other in the z direction.

Here, although the movement restricting portion 3 is disposed above the screen surface S in the z direction, the movement restricting portion 3, not shown, is also disposed below each wire 2 in the z direction. That is, the movement of each wire 2 in the z direction is regulated by sandwiching each wire 2 from above and below in the z direction by the two movement regulating portions 3. Although not shown, it is preferable that at least one movement restricting portion 3 is disposed near each end of each wire 2 (if the wire is sandwiched from above and below in the z direction, at least two movement restricting portions 3 are disposed).

A locking portion 4 (first locking portion 4 a) which is extendable and retractable in the x direction is connected to one end (hereinafter referred to as "one end") of each of the wires 2; the other end (hereinafter referred to as "the other end") of each wire 2 is connected to a locking portion 4 (second locking portion 4 b) which is extendable and retractable in the x direction. Therefore, the movement of each wire 2 in the x direction can also be restricted. Further, the shape of the wire 2 may be a shape maintaining the same area from one end to the other end; or may be tapered from one end to the other end, or from the other end to the one end.

Here, the wedge line is explained as the wire 2. The cross-sectional shape of the wedge line, which is orthogonal to the central axis C, has a trapezoidal, semicircular, or triangular shape. As long as the wedge wire has a flat portion in the cross-sectional shape, the flat portion can be used in the present embodiment by using the flat portion as the screen surface S.

In the present embodiment, an example in which a wedge wire having a triangular sectional shape is used as the wire 2 is shown. Since one side of the triangle is used as the screen surface S, the cross section of the wire 2 becomes gradually thinner as the distance from the screen surface S is increased toward the lower side in the z direction (the direction perpendicular to the screen surface S).

Although the locking portions 4 (the first locking portion 4a and the second locking portion 4 b) may be formed of an elastic body (a spring, an eraser, or the like) that is connected to one end or the other end of each of the first wire 2a and the second wire 2b, here, an example in which the locking portions 4 are formed of a link mechanism is shown. The first locking portion 4a and the second locking portion 4b may be configured in the same manner, or may be configured in different manners, such as by using a link mechanism as one of them and using an elastic body as the other.

The link mechanism includes a pair of two link arms 41 that couple the

adjacent wires

2 and 2. One end portions of the link arms 41 are rotatably coupled to each other by a first coupling pin 41 a. The other end of the link arm 41 is rotatably coupled to the respective end of the adjacent wire rod 2 by the second coupling pin 41 b. Although not shown in fig. 1 to 3 based on the relation of the paper surface, actually, as shown in fig. 4, the two link arms 41 as a pair are connected to each other by an elastic body (a spring, a rubber, or the like) 41 c. The elastic body 41c applies elastic force to the two link arms 41 to bring them close to each other.

The control device 6 can control the movement of the sliding portions pressed against the first wire 2a and the second wire 2b, thereby making the distance between the central axes C at the "one end" of each of the adjacent wires 2 (hereinafter referred to as "first interval Ga") greater than the distance between the central axes C at the "other end" (hereinafter referred to as "second interval Gb").

In the first embodiment, a first sliding portion 5a having a short rod shape with a substantially circular cross section is shown as an example of the sliding portion.

The first sliding portion 5a is a rod-shaped member disposed between two wires 2 adjacent to each other in the x direction (width direction) of the screen device and below the screen surface S of the wires 2 in the z direction. The first sliding portion 5a is disposed in the vicinity of the "one end", for example, in the vicinity of the first locking portion 4 a. Here, one first sliding portion 5a is disposed between each of the two wires 2, and the first sliding portions 5a are disposed so as to contact two adjacent wires 2. Each first sliding portion 5a is preferably configured to: when the first gap Ga is expanded as described later, the respective wires 2 can slide in the x direction independently of each other as they move in the x direction, and the rod axis can be deviated from the y direction.

The control device 6 includes a moving mechanism capable of moving the first slide portion 5a up and down in the z direction, for example, a moving mechanism (not shown) using a hydraulic cylinder, an electric cylinder, or the like, and is capable of moving the first slide portion 5a downward in the z direction from the screen surface S within a predetermined range.

The control device 6 moves the first sliding portion 5a toward the screen surface S, and thus the first sliding portion 5a that comes into contact with both the first wire 2a and the second wire 2b can press and expand the gap between the first wire 2a and the second wire 2b at the contact point in the x direction (the width direction of the screen device). As described above, since the first wires 2a and the second wires 2b are both wedge wires having a triangular cross section, the interval linearly increases in the x direction as the first sliding portion 5a approaches the screen surface S. Specifically, in the example of fig. 4, the first wire 2a moves in the + x direction (positive x direction, i.e., positive direction on the x axis), and the second wire 2b moves in the-x direction (negative x direction, i.e., negative direction on the x axis). At this time, the first wire 2a and the second wire 2b are not moved in the z direction by the restriction action of the movement restricting portion 3.

The control device 6 controls to enlarge the interval between the first wire 2a and the second wire 2b in this way, and thus, the first interval Ga can be made larger than the second interval Gb.

As shown in fig. 5, before the control is executed, the first gap Ga and the second gap Gb are both the predetermined distances, and the first wire 2a and the second wire 2b are not in contact with each other in principle. However, the second gap Gb becomes narrower than the predetermined distance because the first gap Ga is enlarged. Therefore, as an exception, there may be a case where the first wire 2a and the second wire 2b are brought into contact at the respective "other ends".

On the other hand, when the controller 6 first enlarges the distance between the first wire 2a and the second wire 2b as described above, and then moves the first sliding portion 5a downward in the z direction from the screen surface S, that is, moves the first sliding portion 5a further away from the screen surface S, the elastic body 41C applies an elastic force to the two link arms 41 so as to bring them closer to each other, so that the distance between the central axes C of the first wire 2a and the second wire 2b at the contact point can be narrowed in the x direction until the predetermined distance is returned.

In addition, if the screen device 1A is used, it is preferable to use the screen device in such a manner that the y direction is inclined downward from the horizontal line so that the "one end" is positioned further downward in the z direction than the "other end". The object P to be processed is fed onto the screen surface S near the "other end" from above the screen surface S in the z direction. In this way, predetermined treatments such as classification, solid-liquid separation, and concentration can be performed according to the type of the treatment object P.

In the above description, the first sliding portion 5a is described as a short rod-shaped member having a substantially circular cross section, but the link mechanism may be used as the first sliding portion 5a, for example, the first connecting pin 41a, instead of this member. In this case, the controller 6 may move the first sliding portion 5a, i.e., the first coupling pin 41a, toward the screen surface S, and thus may press and expand the distance between the first wire 2a and the second wire 2b in the x direction (the width direction of the screen device) via the second coupling pin 41b and the link arm 41.

As described above, in the screen device 1A of the first embodiment, the size of the interval (screen hole) between the adjacent wire rods 2 can be controlled as shown in fig. 5 by a simple configuration in which the first sliding portion 5a is moved in the z direction: gradually becomes larger from the "other end" toward the "one end" of the wire 2 along the length direction. Therefore, the object to be treated fed to the "other end" can be subjected to a multistage classification or a solid-liquid separation treatment from a small-diameter object to a large-diameter object before reaching the "one end" by using only one sieve device. Therefore, the screen apparatus 1A is a screen apparatus having an excellent CP value.

< modification of the first embodiment >

(Flat plate-shaped Screen device having second sliding part)

Fig. 6 to 8 show a modification of the first embodiment. The same components, devices, and the like as those of the first embodiment are denoted by the same reference numerals, and descriptions thereof are omitted.

This modification is different from the first embodiment in that: as the sliding portion, a second sliding portion 5b in which a plurality of wedge portions 7 described later are arranged in the plate-like movement restricting portion 3 abutting on the screen surface S in the z direction is used instead of the first sliding portion 5a. And in that: the control device 6 is different from the first embodiment in that it is provided with a moving mechanism capable of moving the second slide portion 5b in the y direction, for example, a moving mechanism (not shown) using a hydraulic cylinder, an electric cylinder, or the like, and is capable of moving the second slide portion 5b in a predetermined range along the screen surface S in the + y direction (positive y direction, i.e., positive direction on the y axis) and the-y direction (negative y direction, i.e., negative direction on the y axis). Otherwise, the same applies to the screen device 1A of the first embodiment.

As shown in fig. 8, the wedge portion 7 is a wedge type forming an isosceles triangle when viewed from the xy plane. The length of the base (short side in the x direction) of the wedge 7 is formed to be longer than the predetermined distance. The imaginary line connecting the middle point of the bottom side and the top corner is arranged in the y direction and at the middle point of the interval between the first wire 2a and the second wire 2b. Here, as an example, the plurality of wedge portions 7 are disposed one in each gap of the plurality of adjacent wires 2. Further, each wedge portion 7 is preferably provided with: when the first gap Ga is enlarged, the respective wires 2 can be slid in the x direction independently of each other on the movement restricting portion 3 as a "curtain rail" along with the movement in the x direction, and the rod axis can be deviated from the y direction.

Here, a case will be described where the wedge portion 7 is a wedge shape having an isosceles triangle shape when viewed from the xz plane as shown in fig. 6, and a wedge shape having a right triangle shape when viewed from the yz plane as shown in fig. 7. The wedge portion 7 may be formed in a shape corresponding to the cross-sectional shape of the wire 2: the shape of the rectangle viewed from the xz plane and the shape of the rectangle viewed from the yz plane.

The second sliding portion 5b is disposed such that the apex angle of the wedge portion 7 is at the one end of the first wire 2a and the second wire 2b and is interposed between the first wire 2a and the second wire 2b, as viewed from the xy plane and the z direction. The bottom side of the wedge portion 7 is arranged outside the wire 2 as viewed in the y direction. In this way, the distance in the x direction between the central axes C of the first wire 2a and the second wire 2b can be set to the predetermined distance.

When the first gap Ga is increased to be larger than the second gap Gb in the state where the first wire 2a and the second wire 2b are arranged at the predetermined distance, the control device 6 moves the second sliding portion 5b in the + y direction (positive direction) along the screen surface S. In this way, the wedge portion 7 gradually cuts between the first wire 2a and the second wire 2b in the x direction from the apex angle to the base edge, and presses the first wire 2a and the second wire 2b in the x direction, so that the first gap Ga can be expanded to be larger than the second gap Gb.

In addition, the screen device using the second sliding portion is preferably adapted to enlarge the distance between the central axes C of the adjacent wire rods 2 by a slight distance of about several mm from the predetermined distance at the one end.

In the screen device of this modification, the size of the gap (screen aperture) between the adjacent wires 2 can be controlled by a simple structure in which the second sliding portion 5b is moved in the y direction: from the "other end" to the "one end" of the wire 2, it becomes gradually larger in the longitudinal direction. Therefore, as in the first embodiment, the object to be treated fed to the "other end" can be subjected to a multistage classification treatment from a small diameter object to a large diameter object or a treatment such as solid-liquid separation before reaching the "one end" by using only one sieve device. Therefore, the screen device of this modification is a screen device having an excellent CP value.

< second embodiment >

(cylindrical Screen device with third sliding part)

A sieve device 1B according to a second embodiment will be described with reference to fig. 9 to 12.

The screen apparatus 1B of the second embodiment is greatly different from the first embodiment in that: a cylindrical body having a circular shape and a sieve surface S on the inner surface when viewed from the xz plane is produced by using a plurality of wires 2 connected to each other by the locking portion 4 in the first embodiment. The cylindrical body has a structure in which the central axes C of the respective wire rods 2 are regularly arranged on the same circumference on the xz plane with the central axis O as the center, with the y direction being the longitudinal direction of the respective wire rods 2, while being parallel to each other in the x direction and with the interval of the predetermined distance therebetween.

Further, the sliding portion is different from the first embodiment in that the sliding portion is a conical third sliding portion 5c having an upper bottom with an outer diameter smaller than an inner diameter of the cylindrical body and a lower bottom with an outer diameter larger than the inner diameter of the cylindrical body, and having a conical surface connecting the peripheries of the upper bottom and the lower bottom. If the shape of the third sliding portion 5c is set to: if a cylindrical shape (hereinafter, referred to as a "conical shape tube") having a large through-hole is provided from the center of the upper bottom toward the center of the lower bottom, not only can the material cost be reduced, but the through-hole of the third sliding portion 5c can be used for an application where the object P to be treated can pass through, as shown in application example 3 described later.

Further, the present embodiment is also different from the first embodiment in that a movement restricting portion 8 for restricting the movement of the wire rod 2 around the outer periphery of the cylindrical body is used instead of the movement restricting portion 3 in order to prevent the cylindrical body from being enlarged beyond a predetermined outer diameter. The movement restricting portion 8 is formed to have a short length in the y direction, for example, and has a circular frame as viewed in the xz plane, and an inner diameter slightly larger than an outer diameter of the cylindrical body. Although not shown, it is preferable that at least one movement restricting portion 8 is disposed near each of both ends of each wire rod 2.

The control device 6 is also different from the first embodiment in that it is provided with a moving mechanism 9 capable of moving the third sliding portion 5c in the y direction, for example, a moving mechanism using a hydraulic cylinder, an electric cylinder, or the like, and is capable of moving the third sliding portion 5c in a predetermined range along the central axis O in the + y direction (positive y direction, i.e., positive direction on the y axis) and the-y direction (negative y direction, i.e., negative direction on the y axis).

Further, when the cylindrical body is rotated around the center axis O at a predetermined speed by a driving device including an electric motor or the like, not shown, and the third sliding portion 5c is brought into contact with the wire 2 as described later, the third sliding portion 5c is also rotated together with the cylindrical body at the predetermined speed, which is different from the first embodiment. Otherwise, since the same components, devices, and the like as those of the first embodiment are the same as those of the first embodiment, the same reference numerals are assigned to the components, devices, and the like, and the description thereof will be omitted.

When the first gap Ga is increased to be larger than the second gap Gb in a state where the first wire 2a and the second wire 2b are arranged at the predetermined distance from each central axis C, the control device 6 moves the third sliding portion 5C in the + y direction (positive direction) along the central axis O. In this way, at the "one end" of each of the first wire 2a and the second wire 2b, the conical surface is gradually cut into the cylindrical body, and the first wire 2a and the second wire 2b are pressed outward from the central axis O when viewed in the xz plane, so that the first gap Ga can be expanded to be larger than the second gap Gb.

Further, as shown in fig. 11, the cylindrical body cannot be pushed and expanded to be larger than the inner diameter of the movement restricting portion 8 at "one end" due to the presence of the movement restricting portion 8. As described above, although the cylindrical body rotates at a predetermined speed, the third sliding portion 5c also rotates at the predetermined speed, and therefore, a defect such as friction between the conical surface of the third sliding portion 5c and the wire 2 can be prevented from occurring.

In addition, if the solid-liquid separation treatment of sludge or the like is performed using the sieve device 1B, it is preferable to use the sieve device in a state where one end is disposed below the other end in the z direction and the y direction is disposed in a downward inclination from the horizontal line. In this case, the sludge or the like as the object P to be treated is supplied onto the screen surface S near the other end from above the screen surface S in the z direction.

In the above description, the screen device 1B is formed into a circular cylindrical body having the screen surface S on the inner surface as viewed from the xz plane, using the plurality of wires 2 connected by the locking portions 4. However, depending on the application, a plurality of wire rods 2 connected by the locking portions 4 may be used to form a circular cylindrical body having the screen surface S on the outer side surface as viewed from the xz plane, as shown in fig. 13.

As described above, in the screen device 1B of the second embodiment, by using a simple configuration in which the third sliding portion 5c is moved in the y direction, as shown in fig. 12, the inner diameter of the cylindrical body is pushed and expanded, and the size of the interval (screen hole) between adjacent wire rods 2 can be controlled so as to gradually increase from the "other end" to the "one end" of the wire rod 2 depending on the position thereof in the longitudinal direction. Therefore, similarly to the first embodiment and the modification thereof, the object to be treated fed to the "other end" can be subjected to a multistage classification treatment from a small diameter object to a large diameter object or a treatment such as solid-liquid separation before reaching the "one end" by using only one sieve device. Therefore, the screen device 1B of the second embodiment is a screen device having an excellent CP value.

(modification of the second embodiment)

(cylindrical Screen device with fourth sliding part)

Although not shown, a structure similar to the second sliding portion 5B shown in the modification of the first embodiment may be applied to the screen device 1B of the second embodiment.

That is, the fourth sliding portion in which the wedge portions 7 of the plurality of second sliding portions 5b are arranged in the movement restricting portion 8 is adopted as the sliding portion instead of the third sliding portion 5c, which is different from the second embodiment.

The control device 6 is different from the second embodiment in that it is provided with a moving mechanism capable of moving the fourth sliding portion in the y direction (the direction in which the axis of the central axis O of the cylindrical body extends), and for example, a moving mechanism (not shown) such as a hydraulic cylinder or an electric cylinder is used instead of the moving mechanism 9 for moving the third sliding portion 5c so that the fourth sliding portion can be moved within a predetermined range in the + y direction (the positive y direction, i.e., the positive direction on the y axis) and the-y direction (the negative y direction, i.e., the negative direction on the y axis). Otherwise, the same as the screen device 1B of the second embodiment.

When the first gap Ga is increased to be larger than the second gap Gb in a state where the first wire 2a and the second wire 2b are arranged at the predetermined distance from each central axis C, the control device 6 moves the fourth sliding portion in the + y direction (positive direction) along the central axis O. In this way, at the "one end" of each of the first wire 2a and the second wire 2b, the wedge portion 7 gradually cuts into between the first wire 2a and the second wire 2b from the apex angle to the base edge to press the first wire 2a and the second wire 2b, and therefore, the first interval Ga can be expanded to be larger than the second interval Gb. In this case, the diameter of the cylindrical body at the "one end" becomes larger than that in the state of being arranged at the predetermined distance. Therefore, the shape of each wedge portion 7 is a shape capable of expanding each wire rod 2 in the diameter direction toward the movement restricting portion 8 when the first gap Ga is expanded, for example: viewed on the xz plane, the movement restricting portion 8 is an isosceles triangle shaped wedge.

The screen device of this modification is controlled such that the size of the gap (screen opening) between adjacent wires 2 is gradually increased from the "other end" to the "one end" of the wire 2 according to the position in the longitudinal direction thereof, with a simple structure that allows the fourth sliding portion to move in the y direction. Therefore, similarly to the first embodiment and the modifications thereof and the second embodiment, the object to be treated fed to the "other end" can be subjected to a multistage classification treatment from a small diameter object to a large diameter object or a treatment such as solid-liquid separation before reaching the "one end" by using only one sieve device. Therefore, the screen device of this modification is a screen device having an excellent CP value.

Next, a description will be given of a processing system to which the flat plate-shaped screen device 1A and its modified example of the first embodiment, and the cylindrical screen device 1B and its modified example of the second embodiment are applied, as application examples.

< application example 1>

(foreign substance removal System)

The processing system of fig. 14 is an inclusion removing system 10 using the screen device 1B of the second embodiment. The object P to be treated in the system 10 for removing foreign matter is sludge such as feces and urine or septic tank sludge, and fibrous matter (toilet paper, hair, etc.) is separated from the sludge.

An inclusion removal system 10, comprising at least: a screen device 1B; a drive device 11 such as an electric motor for rotating the cylindrical body of the screen device 1B around the outer periphery of the center axis O; a treated material introduction pipe 12 for supplying the treated material P into the inside of the cylindrical body of the screen device 1B; and a moisture measuring device 13 for measuring the moisture content of the supplied object P. The controller 6 of the sieve device 1B receives the measurement result corresponding to the moisture content from the moisture measuring device 13, and then moves the third sliding portion 5c in the y direction in accordance with the moisture content.

Specifically, if the water content is less than the predetermined value, the control device 6 controls the third sliding portion 5c to move in the + y direction (positive y direction) so that the first gap Ga is greater than the second gap Gb. On the other hand, if the water content is higher than the predetermined value, the controller 6 controls the third sliding part 5c to move in the-y direction (negative y direction) so that the first gap Ga becomes narrower and returns to the predetermined distance. The control device 6 controls the third sliding portion 5c to move in the + y direction (positive y direction) so that the maximum difference between the first interval Ga and the second interval Gb is about 3mm, for example.

That is, the inclusion removing system 10 may control the size of the gap (mesh opening) between the adjacent wire rods 2 so that the gap gradually increases from the "other end" to the "one end" of the wire rod 2 in the longitudinal direction in accordance with the water content of the object P to be treated. Thus, the moisture can be quickly removed from the object to be treated supplied to the "other end" and the fibrous matter can be separated by only one screen device. Therefore, the inclusion removal system 10 is a treatment system that not only has an excellent CP value but also can exhibit excellent solid-liquid separation treatment performance.

The control device 6 also controls the driving of the driving device 11, and controls the rotational speed of the cylindrical body to be lower than a predetermined speed if the water content is higher than the predetermined value, and to be higher than the predetermined speed if the water content is lower than the predetermined value. Therefore, the fibrous material can be easily molded into a roll shape while rotating in the cylinder, and the fibrous material that may block the gap is taken in a roll shape, so that the cylinder can have a self-cleaning (self-cleaning) function.

The cylindrical body is connected to a stay or a wall plate 14 at the "other end", and the stay or the wall plate 14 is fixed to a part of the wire 2 and directly or indirectly transmits the driving force of the driving device 11 to rotate the cylindrical body. As described in detail later, if the second gap Gb can be changed by disposing the third sliding portion or the fourth sliding portion at the "other end", the pillar or the wall plate 14 may be configured to extend outward from the center axis O in the xz plane.

In the present application example, although the screen device 1B (second embodiment) including the third sliding portion 5c is used for description, a processing system having the above-described excellent performance can be provided by using a screen device (modification of the second embodiment) including a fourth sliding portion.

< application example 2>

(sludge dewatering System)

The treatment system of fig. 15 is a sludge dewatering system 15 using the screen device 1B of the second embodiment. Here, the object P to be treated is sludge. A sludge dewatering system 15, which includes at least: a screen device 10B; a screw shaft 18 having a screw blade 17 extending to a length near the inner peripheral surface of the cylindrical body and disposed on the central axis O; a treated object introduction pipe 12a having a double pipe structure, which is disposed on the central axis O and coaxially with the screw shaft 18, and is disposed inside the screw shaft 18; and a water content measuring device 13a for measuring the water content of the object to be treated P (sludge) conveyed by the object-to-be-treated introducing pipe 12 a.

The sludge dewatering system 15 rotates the screw shaft 18 and the cylindrical body at different rotational speeds at high speeds by a driving device, not shown, and presses and conveys the object P to be treated P supplied onto the screen surface S at one end of the cylindrical body from an object-to-be-treated supply hole 19 formed at the distal end of the object-to-be-treated introduction pipe 12a before the object P reaches the other end, and discharges the dewatered sludge cake from a dewatered sludge cake discharge hole 20 disposed in the vicinity of the other end. The screw shaft 18 is gradually enlarged in diameter from one end toward the other end in the cylindrical body, and thus the pressing operation can be performed.

Since the sludge is dewatered by the centrifugal force generated by the high-speed rotation, the sludge dewatering system 15 includes a casing 16 surrounding the cylindrical body so as not to splash the sewage or the like around the cylindrical body. The casing 16 is provided with a separated liquid discharge pipe 21 for discharging the dehydrated water (separated liquid) and a dehydrated cake discharge pipe 22 for discharging the dehydrated cake discharged from the dehydrated cake discharge hole 20.

The controller 6 of the sieve device 1B receives the measurement result corresponding to the moisture content from the moisture measuring device 13a, and then controls the third sliding portion 5c to move in the y direction in accordance with the moisture content. Specifically, if the water content is less than the predetermined value, the control device 6 controls the third sliding portion 5c to move in the + y direction (positive y direction) so that the first gap Ga is greater than the second gap Gb. On the other hand, if the water content is higher than the predetermined value, the controller 6 controls the third sliding part 5c to move in the-y direction (negative y direction) so that the first gap Ga becomes narrower and returns to the predetermined distance.

Further, as described above, since the cylindrical body rotates at a high speed and the sludge is transported while being squeezed from the one end toward the other end, the pressure applied to the sludge on the "other end" side is higher than that on the "one end" side. Therefore, on the "other end" side, sludge may leak out from the gap (mesh) between the adjacent wires 2. Therefore, in addition to the appropriate dewatering of the sludge as the object P to be treated, the control device 6 controls the third sliding portion 5c to move in the + y direction (positive y direction) so that the maximum difference between the first interval Ga and the second interval Gb is about 0.1 to 2mm, for example, in order to prevent the sludge from being discharged to the outside of the cylindrical body before being conveyed to the dewatered sludge cake discharge hole 20.

That is, the sludge dewatering system 15 can control the size of the gap (mesh) between adjacent wires 2 so that the gap gradually increases from the "other end" of the wire 2 toward the "one end" in the longitudinal direction in accordance with the water content of the sludge as the object P to be treated. In other words, the sludge dewatering system 15 can control the size of the gap (mesh) between adjacent wires 2 in accordance with the moisture content of the object P to be treated, i.e., the sludge, such that the gap gradually decreases from one end of the wire 2 toward the other end thereof in the longitudinal direction.

Thus, with only one screen device, moisture can be removed moderately and quickly from the sludge fed to "one end", and a dewatered cake of sludge can be obtained. Therefore, the sludge dewatering system 15 is a treatment system that not only has an excellent CP value but also can exhibit excellent sludge dewatering performance.

In the present application example, although the screen device 1B (second embodiment) including the third sliding portion 5c is used for description, a processing system having the above-described excellent performance can be provided by using a screen device (modification of the second embodiment) including the fourth sliding portion.

< application example 3>

(Lubricant supplying System)

The processing system of fig. 16 uses the lubricant supply system 23 of the screen device 1B of the second embodiment. Here, the object P to be treated is sludge. The sludge is, for example, sludge dehydrated by the sludge dehydrating system 15 of application example 2, that is, dehydrated sludge cake having a low water content and a high viscosity.

The lubricant supply system 23 includes at least: a screen device 10B; a reservoir 24 which covers the periphery of the cylindrical body and stores the lubricant L; a sludge pressure-feeding device 25 disposed outside the cylinder and configured to press and feed the sludge from the "other end" toward the "one end" onto the screen surface S in the cylinder; and a water content measuring device 13b for measuring the water content of the sludge supplied to the cylindrical body.

Here, the third sliding portion 5c of the screen device 1B has the shape of the above-described "conical tube".

The shape of the treated object supply pipe 12b for supplying sludge from the sludge pressure-feeding device 25 to the cylinder is a shape gradually reducing in diameter toward the "other end" of the cylinder, and is inserted into the cylinder from the "other end". The outer diameter of the object-to-be-treated supply pipe 12b is substantially the same size as the inner diameter of the cylindrical body at the "other end".

The conveying pipe 26, which discharges sludge to which the lubricant L has adhered from the "one end" of the cylinder and forms a pipeline to convey the sludge to a predetermined treatment site, is formed in a shape gradually expanded in diameter from the "one end" of the cylinder, and is inserted from the "one end" side so as to cover the outer surface of the cylinder. The inner diameter of the handling tube 26 at the "one end" is substantially the same size as the outer diameter of the cylinder. The inner diameter may be substantially the same as the inner diameter of the movement restricting portion 8.

The lubricant L is introduced into the reserve tank 24 by the lubricant filling device 27. If the lubricant filling device 27 is disposed above the reservoir tank 24 in the z direction, the lubricant L can be filled by dropping the lubricant L by gravity without requiring power of a pump or the like for transportation and pressurization, and therefore, the running cost can be reduced.

The lubricant L fully stored in the storage tank 24 permeates into the cylinder from the space (mesh opening) between the adjacent wire rods 2 of the cylinder, and is applied to the periphery of the sludge pumped into the cylinder.

The material as the lubricant is in a powder or granular form, and is generally applied to the sludge in a state of a lubricant solution dissolved in a liquid. However, in the lubricant supply system 23, even if the lubricant L is in a powder or granular form, the lubricant L can be uniformly and appropriately applied to the sludge linearly and continuously from the entire circumference of the cylindrical body between the wire rods 2, and the lubricant L after contact with the sludge absorbs moisture in the sludge and can be a liquid film of the lubricant solution coated on the surface of the sludge, so that it is not necessary to prepare the lubricant L in a state of the lubricant solution at first. That is, the lubricant L in the lubricant supply system 23 may be the lubricant solution, or may be the original state of the lubricant material in a powder or a pellet form. If the lubricant material is used as the lubricant L in its original state, a device for producing a lubricant solution is not required, and therefore, the manufacturing cost and the running cost can be reduced.

The control device 6 of the sieve device 1B receives the measurement result corresponding to the moisture content from the moisture measuring device 13B, and then controls the third sliding portion 5c to move in the y direction in accordance with the moisture content. Specifically, if the water content is less than the predetermined value, the controller 6 controls the third sliding portion 5c to move in the + y direction (positive y direction) so that the first gap Ga is enlarged to be larger than the second gap Gb, thereby increasing the area of the sludge to which the lubricant L is applied. On the other hand, if the water content is higher than the predetermined value, the control device 6 controls the third sliding portion 5c to move in the-y direction (negative y direction) so that the first gap Ga becomes narrower and returns to the predetermined distance.

As described above, since the shape of the treated object supply pipe 12b is a shape gradually reducing in diameter toward the "other end" of the cylindrical body, the pressure applied to the sludge on the "other end" side is high, and the sludge may seep into the storage tank 24 from the gap (mesh opening) between the adjacent wire rods 2. On the other hand, if the lubricant L is applied around the sludge, the frictional resistance between the sludge and the wire 2 is greatly reduced, and therefore the sludge can be smoothly transported to the "one end" side through the cylinder. Therefore, if the interval (mesh) between the adjacent wire rods 2 is expanded to be larger on the "one end" side than on the "other end" side and a larger amount of the lubricant L is applied to the sludge, the frictional resistance between the sludge and the inner wall of the conveying pipe 26 when the sludge is conveyed by the conveying pipe 26 can be further reduced.

Therefore, in order to not only convey the sludge by the conveying pipe 26 with a low frictional resistance but also prevent the sludge as the object P to be treated from being discharged to the outside of the cylindrical body before being pressure-fed to the "one end", the control device 6 controls the third sliding portion 5c to move in the + y direction (positive y direction) so that the maximum difference between the first interval Ga and the second interval Gb is, for example, about 0.1 to 1 mm.

That is, the lubricant supply system 23 may control the size of the interval (mesh opening) between the adjacent wire rods 2 so that the interval gradually increases from the "other end" to the "one end" of the wire rods 2 in the longitudinal direction in accordance with the water content of the object P to be treated.

Therefore, the lubricant supply system 23 can appropriately apply the lubricant to the object to be treated supplied to the "other end" by using only one screen device. That is, the lubricant supply system 23 is a processing system which has not only an excellent CP value but also good processing performance for applying the lubricant, and can reduce the pumping power, thereby improving the conveyance performance when conveying the object to be processed by the pipeline.

< application example 4>

(incineration residue classification system)

The disposal system of fig. 17 is an incineration residue classification system 28 using the screen device 1A of the first embodiment. Here, the object P is incineration residue after incineration in a waste incinerator 29 such as a hearth incinerator.

An incineration residue classification system 28, which at least comprises: a refuse incinerator 29; a discharge device 30 for receiving incineration residue discharged from the garbage incinerator 29 after incinerating waste, cooling the incineration residue in water, and discharging the incineration residue by a carrying device (e.g., a belt conveyor, a screw conveyor, a chain conveyor, a scraper conveyor, etc.); and a screen device 10A for receiving the incineration residue from the discharge device 30 and classifying the incineration residue. Another screen assembly 10A may be further provided below the screen assembly 10A for further sizing.

The screen apparatus 10A is configured to: the screening surface S is inclined upward and downward from the "other end" toward the "one end". The other end of the discharge device 30 receives the incineration residue discharged from the other end. The incineration residue, which is the object P to be treated received at the "other end", is classified while sliding on the screen surface S by its own weight.

Below the screen device 10A, a classifying container 32 is disposed which can separately contain at least three kinds of classified materials of liquid, small-diameter material, and large-diameter material. Although the large-diameter objects are highly likely to be incombustible such as metals, there are many cases where small-diameter objects are still incineratable, and therefore the control device 6 constantly controls the conveying device 33 such as a belt conveyor to feed the small-diameter objects into the waste hopper 31 and send the small-diameter objects to the waste incinerator 29 for combustion. The classified liquid is a waste liquid, but in order to cool the exhaust gas generated from the waste incinerator 29, for example, the exhaust gas can be sprayed with the liquid and reused.

The control device 6 controls the first gap Ga according to the type of incineration residue received by the screen device 1A. For example, if the incineration residue contains a large amount of unburned components, the controller 6 controls the first sliding section 5a to move in the + z direction (positive z direction) so that the first interval Ga becomes larger than the second interval Gb. On the other hand, if the number of incombustibles (metals, etc.) in the incineration residue is large, the control device 6 controls the third sliding part 5c to move in the negative z-direction (negative z-direction) so as to narrow the first gap Ga back to the predetermined distance. The controller 6 controls the third sliding portion 5c to move in the + z direction (positive z direction) so that the maximum difference between the first interval Ga and the second interval Gb is about 30 to 50cm, for example.

That is, the incineration residue classification system 28 can control the size of the space (mesh) between the adjacent wires 2 according to the kind of the incineration residues P to be treated, so that the space is gradually increased from the "other end" to the "one end" of the wire 2 in the longitudinal direction.

Thus, the moisture can be quickly removed from the object to be treated supplied to the "other end" with only one screen device, and the classification can be performed. The inclusion removal system 10 is a treatment system that not only has an excellent CP value but also can exhibit excellent classification treatment performance.

In the present application example, although the screen device 1A (first embodiment) including the first sliding portion 5a is used for description, a processing system having the above-described excellent performance can be provided by using a screen device (modification of the first embodiment) including the second sliding portion 5 b.

The embodiments, modifications, and application examples of the present invention have been described in detail above with reference to the accompanying drawings. However, the specific configuration is not limited to the embodiments, the modifications, or the application examples, and design changes and the like within a range not departing from the gist of the present invention are also included in the present invention.

For example, it can be made as follows: the control device 6 is configured to be able to change the second gap Gb by arranging the sliding portion at the "other end" as well as the "one end". In this case, the above-described effects can be obtained if the control device 6 enlarges the first interval Ga to be larger than the second interval Gb, and moreover, since the variation in the different combinations of the screen holes in the longitudinal direction of the wire rod 2 can be increased, a more excellent screen device or a processing system including the screen device can be obtained. In this case, the first gap Ga and the second gap Gb can be easily controlled to be the same gap.

Description of the symbols

1A, 1B-sieve device, 2 (2 a, 2B) -wire material, 3-movement restriction part, 4 (4 a, 4B, 4C) -locking part, 41-link arm, 41A-first connecting pin, 41B-second connecting pin, 5 a-first sliding part, 5B-second sliding part, 5C-third sliding part, 6-control device, 7-wedge part, 8-movement restriction part, 9-moving mechanism, 10-inclusion removal system, 11-driving device, 12 a-treated material introduction pipe, 12B-treated material supply pipe, 13a, 13B-moisture measuring device, 14-support column or wall plate, 15-sludge dewatering system, 16-housing, 17-helical blade, 18-screw shaft, 19-treated material supply hole, 20-dewatered sludge block discharge hole, 21-separated liquid discharge pipe, 22-dewatered sludge block discharge pipe, 23-lubricant supply system, 24-storage tank, 25-sludge press-feeding device, 26-conveying pipe, 27-lubricant filling device, 28-incineration residue classification system, 29-garbage incinerator (hearth incinerator), 30-discharge device, 31-garbage hopper, 3-classification container, 33-conveying device, central shaft of C-strand 2, S-screen surface, P-treated material, ga-first interval, gb-second interval, central shaft of O-cylinder, L-lubricant.

Claims

1. A screen apparatus, comprising:

a first wire and a second wire which are provided with a screen surface to which a material to be processed is supplied and are arranged in a straight line shape in which the central axes thereof are parallel to each other;

a first locking portion that movably locks one end of each of the first wire rod and the second wire rod;

a second locking portion that movably locks the other end of each of the first wire rod and the second wire rod;

a control device for controlling a first interval, which is an interval of the respective one ends; and

a sliding portion that presses the first wire and the second wire at the respective one ends;

the control means may change the first interval to be larger than the interval of the respective other ends to be a second interval,

a cylindrical body having the screen surface as an inner surface or an outer surface, the cylindrical body being formed by alternately arranging a plurality of the first wires and the second wires,

the sliding part is provided with a third conical sliding part of which the outer diameter of the upper bottom is smaller than the inner diameter of the cylinder body and the outer diameter of the lower bottom is larger than the inner diameter of the cylinder body,

the control device inserts the third sliding portion from the upper bottom into the cylindrical body to change the first interval to be larger than the second interval.

2. A screen apparatus, comprising:

a first wire and a second wire which are provided with a screen surface supplied with a processed object and are arranged in a straight line shape with their central axes parallel to each other;

the sliding portion includes a fourth sliding portion having a wedge portion disposed on an outer periphery of the cylindrical body, limiting a change in an inner diameter of the cylindrical body at the one end to a predetermined value or less, and interposed between the first wire and the second wire,

the control device moves the fourth sliding portion in the axial direction of the cylindrical body to cut the wedge portion between the first wire and the second wire, thereby changing the first interval to be larger than the second interval.

3. A processing system, having:

the screen apparatus of claim 1 or 2;

a drive device capable of rotating the screen device on the outer periphery of the axis of the cylindrical body;

a treated material inlet pipe for supplying sludge as the treated material to the sieve surface at the other end; and

a moisture measuring device for measuring the moisture content of the sludge,

the control device changes the first interval in cooperation with the water content.

4. A processing system, having:

the screen apparatus of claim 1 or 2;

a treated material inlet pipe for supplying sludge as the treated material to the sieve surface at the one end;

a screw shaft disposed inside the cylindrical body and on an axis of the cylindrical body, the screw shaft transporting the sludge from the one end to the other end; and

a moisture measuring device for measuring the moisture content of the sludge,

5. A processing system, having:

the screen apparatus of claim 1 or 2;

a sludge pressure-feeding device which is disposed outside the cylindrical body and which pressure-feeds sludge as the object to be treated from the screen surface at the other end to the screen surface at the one end;

a storage tank which is wrapped around the screen device and stores a lubricant; and

a moisture measuring device for measuring the moisture content of the sludge,

the control device changes the first interval in accordance with the water content, and supplies the lubricant to the periphery of the sludge to be passed through the inside of the screen device from between the first wire and the second wire.

6. A processing system, having:

an incinerator for incinerating waste to discharge incineration residue;

a discharge device for discharging the incineration residue after cooling the incineration residue; and

the screen device of claim 1 or 2, configured to be inclined downward from the other end toward the one end, and the incineration residue is fed to the other end by the discharge device,

the control device changes the first interval in accordance with the kind of the incineration residue to classify the incineration residue.