Method for cleaning the screen of a screw dehydrator and a screw dehydrator

Abstract

To provide a method of cleaning the screen of a screw-type dehydrator in which a fluid supply passage is improved, and to provide the screw-type dehydrator.SOLUTION: Provided is a method of cleaning the screen of a screw-type dehydrator S1 for dehydrating a to-be-dehydrated object while conveying the object between a screw SC and a screen 2, where a moving body 3 having an annular part in which a plurality of injection nozzles are arranged being alternately moved to one side and to the other side of the screen 2, thereby allowing clogging of an opening part of the screen 2 to be removed by jetting a fluid from the plurality of jetting nozzles to the screen 2, wherein the plurality of jetting nozzles are arranged at intervals over substantially the whole inner periphery of the annular part opposed to the screen 2, the fluid is supplied to the annular part by a fluid supply passage 4, the fluid supply passage 4 branches at a branch part, and one branch is connected to a first annulus 301 and the other branch is detachably connected to a second annulus 302, and a fluid supply passage 4 which is an upstream part of the fluid from the branch part is supported on a body of the screw-type dehydrator S1 in a freely swingable manner.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for cleaning a screen of a screw dehydrator and a screw dehydrator, and more particularly to a method for cleaning a screen of a screw dehydrator and a screw dehydrator with an improved fluid supply passage. [Background technology]

[0002] Conventionally, there are screw dewatering machines equipped with a cleaning device for removing clogging from the screen (see, for example, patent documents). The cleaning liquid supply mechanism for supplying cleaning liquid from the cleaning liquid supply unit (26) of this screw dehydrator to the cleaning device includes a rigid first supply pipe (36) connected to the cleaning device via a first swivel joint (33), a rigid second supply pipe (37) connected to the cleaning liquid supply unit (26) via a second swivel joint (34), and a third swivel joint (35) connecting the first supply pipe (36) and the second supply pipe (37), and the third swivel joint (35) is configured to move on an arc-shaped trajectory centered on the first swivel joint (33) and on an arc-shaped trajectory centered on the second swivel joint (34) as the cleaning device moves. A hot water nozzle (20) is provided above the screen (3) in the casing (5), and a cleaning nozzle (18) is provided below the screen (5). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-58029 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-mentioned screw dehydrator, the first swivel joint (33) is connected to the pipe connecting the cleaning pipe (21) and the cleaning pipe (22), and the rotation support part of the first supply pipe (36) is the first swivel joint (33), the rotation support part of the second supply pipe (37) is the second swivel joint (34), and the rotation support part of the first supply pipe (36) and the second supply pipe (37) is the third swivel joint (35), so there are three rotation support parts, which becomes a cause of leakage. In addition, there is a problem that the pipes connecting the cleaning pipe (21) and the cleaning pipe (22) that support the first swivel joint (33), the first supply pipe (36) and the second supply pipe (37), must also be strong.

[0005] SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and an object of the present invention is to provide a method for cleaning a screen of a screw dehydrator and a screw dehydrator. [Means for solving the problem]

[0006] The method for cleaning the screen of a screw-type dehydrator according to claim 1 is a method for cleaning the screen of a screw-type dehydrator that dehydrates materials while transporting them between the screw and the screen, and comprises moving a movable body having an annular portion on which a plurality of injection nozzles are arranged alternately from one side of the screen to the other side and from the other side of the screen to one side, and injecting fluid from the plurality of injection nozzles onto the screen to remove clogs in the openings of the screen, the plurality of injection nozzles being arranged at intervals along substantially the entire inner circumference of the annular portion facing the screen, and the fluid being supplied to the annular portion through a fluid supply passage, the annular portion having first and second annular portions located on both sides, the fluid supply passage being separated from a branching portion, one of which is detachably connected to the first annular portion and the other to the second annular portion, and the portion of the fluid supply passage upstream of the branching portion in the direction of the fluid being supported by the screw-type dehydrator body so as to be able to swing freely. The fluid supply passage is formed of a flexible tube. It is something.

[0007] A second aspect of the invention relates to a method for cleaning a screen of a screw-type dehydrator, which is the method for cleaning a screen of a screw-type dehydrator of the first aspect, wherein the movable body has first and second horizontal members that move in a horizontal direction, the first annular portion has a first semi-annular portion having a plurality of jet nozzles arranged thereon and a first' semi-annular portion having a plurality of jet nozzles arranged thereon, the first semi-annular portion being detachably attached to a first semi-annular mounting plate, the first' semi-annular portion being detachably attached to the first' semi-annular mounting plate, and the second semi-annular portion being detachably attached to the first' semi-annular mounting plate. The annular portion has a second semi-annular portion having a plurality of jet nozzles arranged therein and a second' semi-annular portion having a plurality of jet nozzles arranged therein, the second semi-annular portion being detachably attached to a second semi-annular mounting plate, the second' semi-annular portion being detachably attached to the second' semi-annular mounting plate, the first semi-annular mounting plate and the second semi-annular mounting plate being attached to the first horizontal member, and the first' semi-annular mounting plate and the second' semi-annular mounting plate being attached to the second horizontal member.

[0008] The screw-type dehydrator described in claim 3 is a screw-type dehydrator that dehydrates materials to be dehydrated while transporting them between a screw and a screen, and comprises a movable body having an annular portion on which a plurality of injection nozzles are arranged, which moves alternately from one side of the screen to the other and from the other side to the other side of the screen to inject fluid onto the screen from the plurality of injection nozzles to remove clogs in the openings of the screen, the plurality of injection nozzles being arranged at intervals over substantially the entire inner periphery of the annular portion facing the screen, and the fluid being supplied to the annular portion through a fluid supply passage, the annular portion having first and second annular portions located on both sides, the fluid supply passage being separated from a branching portion, one of which is detachably connected to the first annular portion and the other to the second annular portion, and the portion of the fluid supply passage upstream of the branching portion in the direction of the fluid is supported by the screw-type dehydrator body so as to be swingable. The fluid supply passage is formed of a flexible tube. It is something.

[0009] A screw type dehydrator according to claim 4 is the screw type dehydrator according to claim 3, wherein the movable body has first and second horizontal members that move in a horizontal direction, the first annular portion has a first semi-annular portion having a plurality of jet nozzles arranged thereon and a first' semi-annular portion having a plurality of jet nozzles arranged thereon, the first semi-annular portion being detachably attached to a first semi-annular mounting plate, the first' semi-annular portion being detachably attached to the first' semi-annular mounting plate, and the second annular portion is a second semi-annular portion having a plurality of jet nozzles arranged thereon. and a semi-annular second' semi-annular portion having a plurality of injection nozzles arranged therein, the second semi-annular portion being detachably attached to a second semi-annular mounting plate, the second' semi-annular portion being detachably attached to the second' semi-annular mounting plate, the second' semi-annular portion being detachably attached to the second' semi-annular mounting plate, the first semi-annular mounting plate and the second semi-annular mounting plate being attached to the first horizontal member, and the first' semi-annular mounting plate and the second' semi-annular mounting plate being attached to the second horizontal member. [Effects of the Invention]

[0011] According to the method for cleaning the screen of a screw dehydrator described in claim 1, the fluid supply passage is separated from the branching portion, with one side connected to the first annular portion and the other side connected to the second annular portion, and the portion of the fluid supply passage upstream of the branching portion is supported on the screw dehydrator body so that it can swing freely.This means that the fluid supply passage within the screw dehydrator body can be shortened and made compact, and further, because the fluid supply passage within the screw dehydrator body is short, there are fewer factors that could cause a malfunction.

[0012] Furthermore, according to the method for cleaning the screen of a screw dehydrator set forth in claim 2, in addition to the effects of the invention set forth in claim 1 described above, if the injection nozzle becomes clogged, the first semi-annular portion, the first' semi-annular portion, the second semi-annular portion, and the second' semi-annular portion of the clogged injection nozzle can be removed from the first semi-annular mounting plate, the first' semi-annular mounting plate, the second semi-annular mounting plate, and the second' semi-annular mounting plate, and repaired easily.

[0013] Furthermore, according to the screw type dehydrator described in claim 3, the fluid supply passage is separated from the branching portion, one side connected to the first annular portion and the other side connected to the second annular portion, and the portion of the fluid supply passage upstream of the branching portion is supported by the screw type dehydrator body so that it can swing freely.This means that the fluid supply passage within the screw type dehydrator body can be shortened and made compact, and furthermore, since the fluid supply passage within the screw type dehydrator body is short, there are fewer factors that could cause a malfunction.

[0014] Furthermore, according to the screw type dehydrator of claim 4, in addition to the effect of the invention of claim 3 described above, if the injection nozzle becomes clogged, the first semi-annular portion, the first' semi-annular portion, the second semi-annular portion, and the second' semi-annular portion of the clogged injection nozzle can be removed from the first semi-annular mounting plate, the first' semi-annular mounting plate, the second semi-annular mounting plate, and the second' semi-annular mounting plate, and repaired easily.

[0015] Also, claims 3 According to the screw dehydrator , minutes The fluid supply passage, which is the upstream portion of the fluid from the branch portion, is formed of a flexible tube, and therefore can be supported by simple means on the screw dehydrator body so as to be swingable. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a schematic cross-sectional view of a screw dehydrator according to one embodiment of the present invention. [Figure 2] FIG. 2 is a schematic cross-sectional view showing a state in which the moving body of FIG. 1 has moved rightward. [Figure 3] FIG. 3 is a schematic cross-sectional view of FIG. [Figure 4] FIG. 4 is a schematic diagram of the main part of FIG. [Figure 5] FIG. 5 is a schematic plan view of FIG. [Figure 6] FIG. 6 is a schematic exploded perspective view of an annular portion in which a plurality of injection nozzles shown in FIG. 1 are arranged. DETAILED DESCRIPTION OF THE INVENTION

[0017] A method for cleaning a screen of a screw-type dehydrator and a screw-type dehydrator according to an embodiment of the present invention will be described with reference to the drawings (FIGS. 1 to 6).

[0018] S shown in Figure 1 is a well-known screw-type dehydrator (for example, the screw-type dehydrator described in JP 2004-313823 A) that dehydrates objects to be dehydrated (objects to be dehydrated not shown are, for example, fruit, diapers that have absorbed liquid, etc.) while transporting them between a screw SC and a screen 2 in a casing 1. This screw-type dehydrator S has a moving body 3 having an annular portion 30 on which a plurality of injection nozzles 31 are arranged, which moves alternately from one side of the screen 2 (for example, an end 2A on one side) to the other side (for example, an end 2B on the other side) and from the other side of the screen 2 (for example, an end 2B on the other side) to one side (for example, an end 2A on one side), and sprays a fluid (for example, water) from the plurality of injection nozzles 31 onto the screen 2 to remove clogs in the openings of the screen 2.

[0019] A plurality of injection nozzles 31 are arranged at intervals along substantially the entire inner circumference of the annular portion 30 facing the screen 2. The annular portion 30 has first and second annular portions 301 and 302 located on both sides. The fluid is supplied to the annular portion 30 through a fluid supply passage 4. The fluid supply passage 4 is separated from a branch portion 40, with one end detachably connected to the first annular portion 301 and the other end detachably connected to the second annular portion 302. A portion 40X of the fluid supply passage 4, which is upstream of the branch portion 40 in the direction of the fluid, is supported by the screw dehydrator main body S1 so as to be swingable. As shown in FIG. 6, the first annular portion 301 is divided into two parts: a semi-annular first semi-annular portion 3011 and a semi-annular first' semi-annular portion 3011' having a plurality of injection nozzles arranged therein, as will be described later. However, the present invention is not limited to this, and a single annular portion (not shown) may also be used.

[0020] Furthermore, as will be described later, the second annular portion 302 is divided into two parts: a semi-annular second semi-annular portion 3021 and a semi-annular second' semi-annular portion 3021' having a plurality of injection nozzles arranged therein; however, in the present invention, this is not limited to this, and although not shown, it may also be a single annular portion.

[0021] Therefore, the above-mentioned screw type dehydrator (screen cleaning method for screw type dehydrator) According to S), the fluid supply passage 4 is separated from the branching portion 40, one side of which is connected to the first annular portion 301 and the other side to the second annular portion 302, and the portion 40X of the fluid supply passage 4 upstream of the branching portion 40 is supported so as to be able to swing freely on the screw dehydrator body S1. This makes it possible to shorten the fluid supply passage 4 within the screw dehydrator body S1 and make it compact, and also has the effect of reducing the risk of malfunction because the fluid supply passage 4 within the screw dehydrator body S1 is short.

[0022] The fluid supply passage 4, which is located upstream of the branching portion 40 in the fluid direction, is preferably formed of a flexible tube. The moving body 3 has first and second horizontal members 32, 32' that move in the horizontal direction. The first annular portion 301 may be a single annular portion (not shown), but in this embodiment it is divided into two portions: a first semi-annular portion 3011 having a semi-annular shape with a plurality of injection nozzles 31 arranged therein, and a first' semi-annular portion 3011' having a semi-annular shape with a plurality of injection nozzles 31 arranged therein.

[0023] The first semi-annular portion 3011 is detachably attached to a first semi-annular mounting plate 3011P (for example, with a bolt B1, a nut, etc.). The first' semi-annular portion 3011' is detachably attached to a first' semi-annular mounting plate 3011'P (for example, by bolts, nuts, etc. not shown).

[0024] Furthermore, although the second annular portion 302 may be a single annular portion (not shown), in this embodiment it is divided into two portions: a second semi-annular portion 3021 having a semi-annular shape with a plurality of injection nozzles 31 arranged therein, and a second' semi-annular portion 3021' having a semi-annular shape with a plurality of injection nozzles 31 arranged therein. The second semi-annular portion 3021 is detachably attached to a second semi-annular attachment plate 3021P (for example, with a bolt B1, a nut, etc.). The second' semi-annular portion 3021' is detachably attached to a second' semi-annular attachment plate 3021'P (for example, by bolts, nuts, etc. not shown).

[0025] Therefore, if the injection nozzle 31 becomes clogged, the first semi-annular portion 3011, the first' semi-annular portion 3011', the second semi-annular portion 3021, and the second' semi-annular portion 3021 of the clogged injection nozzle 31 can be removed from the first semi-annular mounting plate 3011P, the first' semi-annular mounting plate 3011'P, the second semi-annular mounting plate 3021P, and the second' semi-annular mounting plate 3021'P, and the second' semi-annular mounting plate 3021'P, respectively, and repaired easily.

[0026] The moving body 3 also has first and second horizontal members 32, 32', and the first semi-annular mounting plate 3011P and the second semi-annular mounting plate 3021P are attached to the first horizontal member 32, The first' semi-annular mounting plate 3011'P and the second' semi-annular mounting plate 3021'P are attached to the second horizontal member 32'. The first and second horizontal members 32, 32' are attached to a member 6 having a generally gate-shaped cross section, and the member 6 is connected to a slider 8 connected to a ball screw (not shown) driven by a motor 7 that rotates forward and backward. In addition, 5 is a hopper that supplies the material to be dehydrated (not shown), 51 is an outlet for the squeezed material to be dehydrated (not shown), and 52 is an outlet for the water produced when squeezing the material to be dehydrated (not shown). [Explanation of symbols]

[0027] S Screw type dehydrator S1 Screw-type Dehydrator Body 1 casing 2 screens 2A One edge of the screen 2B The other edge of the screen 3. Mobile 30 Annular section 31 Injection nozzle 32 First horizontal member 32' Second horizontal member 301 First Circular Section 3011 First semi-annular portion of semi-annular 3011' 1st semi-annular section of semi-annular 302 Second Circular Section 3021 Second half of the half ring 3021' 2nd half of the half ring 4 Fluid supply passage 40 Branch 40X Fluid supply passage area 5 Hopper 51 Outlet for dehydrated material 52 Water outlet 6 Components 7 Motor 8 Slider

Claims

1. A method for cleaning the screen of a screw-type dehydrator that dehydrates materials while transporting them between the screw and the screen, comprising: a movable body having an annular portion on which a plurality of jet nozzles are arranged is moved alternately from one side of the screen to the other side and from the other side of the screen to one side, and fluid is jetted onto the screen from the plurality of jet nozzles to remove clogging of the openings of the screen; a plurality of the injection nozzles are arranged at intervals along substantially the entire inner periphery of the annular portion facing the screen; a fluid supply passage for supplying the fluid to the annular portion; The annular portion has first and second annular portions located on opposite sides thereof, the fluid supply passage is separated from the branch portion, and one end of the fluid supply passage is detachably connected to the first annular portion and the other end of the fluid supply passage is detachably connected to the second annular portion; a portion of the fluid supply passage upstream of the branching portion in the direction of the fluid is supported by a screw dehydrator body so as to be swingable; The fluid supply passage is formed of a flexible tube. A method for cleaning a screen of a screw dehydrator.

2. the moving body has first and second horizontal members that move in a horizontal direction; the first annular portion includes a first semi-annular portion having a plurality of jet nozzles arranged therein and a first' semi-annular portion having a plurality of jet nozzles arranged therein; the first semi-annular portion is removably attached to a first semi-annular mounting plate; the first' semi-annular portion is removably attached to a first' semi-annular mounting plate; the second annular portion includes a second semi-annular portion having a plurality of jet nozzles arranged therein and a second' semi-annular portion having a plurality of jet nozzles arranged therein; the second semi-annular portion is removably attached to a second semi-annular mounting plate; the second' semi-annular portion is removably attached to a second' semi-annular mounting plate; the first semi-annular mounting plate and the second semi-annular mounting plate are attached to the first horizontal member; The first' semi-annular mounting plate and the second' semi-annular mounting plate are attached to the second horizontal member.

2. The method for cleaning a screen of a screw dehydrator according to claim 1.

3. A screw-type dehydrator that dehydrates materials while transporting them between a screw and a screen, a movable body having an annular portion on which a plurality of jet nozzles are arranged is moved alternately from one side of the screen to the other side and from the other side of the screen to one side, and fluid is jetted onto the screen from the plurality of jet nozzles to remove clogging of the openings of the screen; a plurality of the injection nozzles are arranged at intervals along substantially the entire inner periphery of the annular portion facing the screen; a fluid supply passage for supplying the fluid to the annular portion; The annular portion has first and second annular portions located on opposite sides thereof, the fluid supply passage is separated from the branch portion, and one end of the fluid supply passage is detachably connected to the first annular portion and the other end of the fluid supply passage is detachably connected to the second annular portion; a portion of the fluid supply passage upstream of the branching portion in the direction of the fluid is supported by a screw dehydrator body so as to be swingable; The fluid supply passage is formed of a flexible tube. A screw type dehydrator characterized by:

4. the moving body has first and second horizontal members that move in a horizontal direction; the first annular portion includes a first semi-annular portion having a plurality of jet nozzles arranged therein and a first' semi-annular portion having a plurality of jet nozzles arranged therein; the first semi-annular portion is removably attached to a first semi-annular mounting plate; the first' semi-annular portion is removably attached to a first' semi-annular mounting plate; the second annular portion includes a second semi-annular portion having a plurality of jet nozzles arranged therein and a second' semi-annular portion having a plurality of jet nozzles arranged therein; the second semi-annular portion is removably attached to a second semi-annular mounting plate; the second' semi-annular portion is removably attached to a second' semi-annular mounting plate; the first semi-annular mounting plate and the second semi-annular mounting plate are attached to the first horizontal member; The first' semi-annular mounting plate and the second' semi-annular mounting plate are attached to the second horizontal member.

4. The screw dehydrator according to claim 3.

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