阅读说明：本技术 纤维状脱水助剂的供给装置 (Device for supplying fibrous dewatering aid ) 是由 三井美典 疋田隆俊 于 2019-12-11 设计创作，主要内容包括：一种纤维状脱水助剂的供给装置,具备：具有沿上下方向延伸的中心线(O)的有底圆筒状的漏斗(1)；切出部(5),在围绕中心线(O)旋转的旋转轴(5A)的下端部设置有向外周侧延伸的切出叶片(5B)；以及在漏斗(1)的底面(1E)开口并从中心线(O)侧延伸到外周侧的切出口(6),通过切出部(5)切出保持在漏斗(1)内的纤维状脱水助剂并从切出口(6)排出供给,其中,切出口(6)以旋转轴(5A)的旋转方向(R)侧的端缘(6A)低于旋转轴(5A)的旋转方向(R)相反侧的端缘(6B)的方式具有阶梯差。(A supply device for a fibrous dewatering aid, comprising: a bottomed cylindrical funnel (1) having a center line (O) extending in the vertical direction; a cut-out section (5) provided with cut-out blades (5B) extending to the outer peripheral side at the lower end of a rotating shaft (5A) rotating around a center line (O); and a cut-out opening (6) which is open at the bottom surface (1E) of the funnel (1) and extends from the center line (O) side to the outer peripheral side, and the fibrous dewatering aid held in the funnel (1) is cut out by the cut-out portion (5) and discharged and supplied from the cut-out opening (6), wherein the cut-out opening (6) has a step difference in such a manner that an end edge (6A) on the side of the rotation direction (R) of the rotation shaft (5A) is lower than an end edge (6B) on the opposite side of the rotation direction (R) of the rotation shaft (5A).)

1. A supply device for a fibrous dewatering aid, comprising:

a bottomed cylindrical funnel having a center line extending in the vertical direction;

a cutting section provided with a cutting blade extending to an outer peripheral side at a lower end portion of a rotating shaft rotating around the center line; and

a cutout opening at a bottom surface of the funnel and extending from the center line side to an outer peripheral side,

the fibrous dewatering aid held in the hopper is cut out by the cut-out portion and discharged and supplied from the cut-out,

the cutout opening has a step so that an end edge on a side of the rotation axis in the rotation direction is lower than an end edge on an opposite side of the rotation axis in the rotation direction.

2. The supply apparatus of a fibrous dewatering aid according to claim 1,

the cutting portion is provided with a plurality of the cutting blades,

in the plurality of cut-out blades, the height of the upper end edge of at least one part of the cut-out blades in the center line direction is different from the height of the upper end edge of at least one other part of the cut-out blades in the center line direction.

3. The supply apparatus of a fibrous dewatering aid according to claim 1 or 2, wherein,

a discharge portion is provided in the cutout, and the discharge portion includes: a discharge groove with a U-shaped cross section extending along the cut-out and a screw conveyer inserted into the discharge groove,

an upper end edge of the discharge groove is located above an upper edge portion of a screw blade of the screw conveyor so as to be spaced apart from the upper edge portion of the screw blade.

Technical Field

The present invention relates to a device for supplying a fibrous dewatering aid, which cuts out a fibrous dewatering aid such as a material for producing a nonwoven fabric and supplies the fibrous dewatering aid to a sludge storage tank or the like.

This application claims priority based on patent application No. 2018-234324 filed in japan at 12, 14, 2018, the contents of which are incorporated herein by reference.

Background

Fibrous dehydration assistants such as materials for producing such nonwoven fabrics have good dispersibility in liquids, and are used for dehydration treatment of sludge, for example, when supplied to a sludge tank or the like. As a supply device for such a fibrous dewatering assistant, for example, patent document 1 describes a supply device for a fibrous dewatering assistant, which includes: a funnel for feeding a fibrous dehydration assistant containing water into the interior; a screw feeding part provided with a screw on a rotating shaft rotatably disposed in the hopper; and a fan-shaped blade located in or near the screw feeding part and mounted on the rotating shaft, the fan-shaped blade being bent or curved at an angle of 10 to 100 degrees toward a rotation direction of the fan-shaped blade.

Patent document 1: japanese patent laid-open publication No. 2009-255000

However, as described in patent document 1, the fibrous dewatering assistant described above contains a little water and is pressed tightly inside the funnel, which tends to cause a bridging phenomenon. However, in the feeding device described in patent document 1, the hopper has a conical portion connected to the hopper discharge port, and the screw feeding portion is located in the conical portion. Therefore, the conical portion is likely to cause a dense pressure of the fibrous dewatering assistant, and clogging is caused by a bridging phenomenon, which may make it difficult to smoothly discharge and supply the fibrous dewatering assistant.

Disclosure of Invention

The present invention has been made under such a background, and an object thereof is to provide a supply device for a fibrous dewatering assistant, which can smoothly discharge the fibrous dewatering assistant and supply the fibrous dewatering assistant to a sludge storage tank or the like.

The present invention is a supply device for a fibrous dewatering aid, comprising: a bottomed cylindrical funnel having a center line extending in the vertical direction; a cutting section provided with a cutting blade extending to an outer peripheral side at a lower end portion of a rotating shaft rotating around the center line; and a cutting port that opens at a bottom surface of the funnel and extends from the center line side to an outer peripheral side, the fibrous dewatering aid held in the funnel being cut by the cutting portion and discharged and supplied from the cutting port, the cutting port having a step so that an end edge on a rotation direction side of the rotation shaft is lower than an end edge on an opposite rotation direction side of the rotation shaft.

In the apparatus for supplying a fibrous dewatering agent configured as described above, when the cutting blade of the cutting portion passes through the upper portion of the cutting port as the rotating shaft rotates, the fibrous dewatering agent is cut out and discharged from the cutting port, and is supplied to a sludge storage tank or the like. In this case, since the cut-out port has a step so that the end edge on the side of the rotation direction of the rotation shaft is lower than the end edge on the opposite side of the rotation direction of the rotation shaft, the cut-out fibrous dewatering aid is smoothly discharged by dropping from the cut-out port without being caught by the end edge on the side of the rotation direction when being pressed in the rotation direction of the rotation shaft.

Therefore, according to the apparatus for supplying a fibrous dewatering aid having the above-described configuration, even if the fibrous dewatering aid is densely packed in the hopper, clogging due to a bridging phenomenon can be prevented from occurring at the cut-out, and the fibrous dewatering aid can be smoothly discharged and stably supplied to the sludge storage tank or the like. Further, by smoothly discharging the fibrous dewatering assistant in this way, there is no possibility that an excessive load acts on the cut-out portion, and the power required for the rotational driving of the rotating shaft of the cut-out portion can be reduced.

Here, when the cutout portion has a plurality of the cutout blades, it is preferable that the height of the center line direction of the upper end edge of at least a part of the plurality of the cutout blades is different from the height of the center line direction of the upper end edge of at least another part of the plurality of the cutout blades.

By thus setting the upper end edges of the plurality of cutting blades provided at the lower end portion of the rotating shaft and extending to the outer circumferential side to different heights, the upper surface of the fibrous dewatering aid undulates like a wave when these cutting blades rotate below the upper surface of the fibrous dewatering aid held in the hopper. Therefore, since the fibrous dehydration assistant is not entangled with each other but is collapsed, the occurrence of the bridging phenomenon can be more effectively prevented.

Further, the fibrous dewatering aid discharged from the cut-out may be directly supplied to a sludge storage tank or the like by dropping, but a discharge unit may be provided at the cut-out, and the discharge unit may include: a discharge groove having a U-shaped cross section extending along the cut-out, and a screw conveyor inserted into the discharge groove, and the screw conveyor feeds the molten metal by controlling the feed amount such as constant feed.

In this case, the upper end edge of the discharge groove is located above the upper edge portion of the screw blade of the screw conveyor so as to be spaced apart from the upper edge portion of the screw blade, whereby the fibrous dewatering assistant can be spread to the upper portion in the discharge groove having a U-shaped cross section and conveyed while being dispersed. Therefore, the fibrous dewatering assistant can be prevented from being densely packed in the discharge tank, and the fibrous dewatering assistant can be prevented from being clogged due to the bridging phenomenon in the discharge tank, and thus the fibrous dewatering assistant can be supplied to the sludge storage tank or the like while being dispersed.

As described above, according to the present invention, it is possible to prevent the fibrous dewatering assistant from being caught by the notch due to bridging, and to smoothly discharge the fibrous dewatering assistant and stably supply the fibrous dewatering assistant to the sludge storage tank or the like.

Drawings

Fig. 1 is a plan view showing an embodiment of the present invention (although the cover 7E is not shown).

Fig. 2 is a cross-sectional view XX in fig. 1.

Fig. 3 is a YY sectional view in fig. 1.

Fig. 4 is a ZZ sectional view in fig. 2 (although illustration of the lid 7E is omitted).

Detailed Description

Fig. 1 to 4 show an embodiment of the present invention. In the present embodiment, the funnel 1 holding the fibrous dewatering aid is formed in a bottomed cylindrical shape with a center line O extending in the vertical direction as the center from a metal material such as stainless steel, and the leg portion 1B joined to the bottom portion 1A is placed on and supported by the mount 3 by the weight measuring unit 2 such as a weight sensor. The opening at the upper end of the cylindrical body portion 1C of the funnel 1 is covered with a disk-shaped lid 1D having an inlet port, not shown.

A cutting blade rotating portion 4 such as a gear motor is disposed on the cover 1D at a position avoiding the inlet port. Further, a cylindrical shaft-shaped rotation shaft 5A protruding from the cover body 1D of the hopper 1 into the main body portion 1C along the center line O is connected to the cut-out blade rotating portion 4, and a cut-out blade 5B extending toward the outer peripheral side is provided at the lower end portion of the rotation shaft 5A, and the rotation shaft 5A and the cut-out blade 5B of the cut-out portion 5 form a cut-out portion 5, and the cut-out blade rotating portion 4 rotates the cut-out blade 5B in the rotation direction R shown in fig. 4 around the center line O.

In the present embodiment, as shown in fig. 2 and 4, a plurality of (two) cut-out blades 5B are provided at positions rotationally symmetrical with respect to the center line O, and these cut-out blades 5B are formed in a trapezoidal plate shape as viewed from the rotational direction R, extending along one plane including the center line O. The lower end edges of the cut-out blades 5B extend in a straight line perpendicular to the center line O and are close to and face the bottom surface 1E which is the upper surface of the bottom portion 1A of the funnel 1, the upper end edges of the cut-out blades 5B are inclined downward (downward in fig. 2 and 3) toward the outer peripheral side, and the outer peripheral edges of the cut-out blades 5B extend parallel to the center line O and are close to and face the inner peripheral surface of the main body portion 1C.

However, the heights of the cut blades 5B in the direction of the center line O at the upper end edge are different from each other in the height of one cut blade 5B and the other cut blade 5B in the present embodiment, as shown in fig. 2. The upper end edges of the cut-out blades 5B are set to be located at a position lower than the upper surface of the fibrous dewatering agent held in the hopper 1 when the fibrous dewatering agent is normally supplied.

In the present embodiment, the inclination of the upper edge of the cut-out blade 5B is also different. In the present embodiment, as shown in fig. 2, the inclination angle of the upper end edge of one cutout blade (the right cutout blade in fig. 2) 5B having a lower height in the direction of the center line O of the upper end edge with respect to a plane perpendicular to the center line O is made larger than the inclination angle of the upper end edge of the other cutout blade (the left cutout blade in fig. 2) 5B having a higher height in the direction of the center line O of the upper end edge with respect to a plane perpendicular to the center line O.

Further, reinforcing ribs 5C are attached to the side surfaces of the cut-out blades 5B facing the opposite side to the rotation direction R. These ribs 5C are formed in a V-shaped cross section, and have upper surfaces inclined downward in a direction opposite to the rotational direction R, and lower surfaces perpendicular to side surfaces of the cut-out blades 5B opposite to the rotational direction R.

Further, these ribs 5C are inclined downward toward the outer peripheral side in the one cut-out blade 5B in accordance with the inclination of the upper end edge of the one cut-out blade 5B, and extend along the upper end edge. The rib 5C of the other cut-out blade 5B also extends obliquely downward toward the outer peripheral side at the same position and at the same inclination as the rib 5C of the one cut-out blade 5B in the rotational locus around the center line O.

On the other hand, a cutout 6 extending from the center line O side to the outer peripheral side is formed in the bottom surface 1E of the funnel 1 so as to penetrate the bottom portion 1A of the funnel 1. In the present embodiment, the cutout 6 is formed by cutting out a range from a position slightly on the outer peripheral side of the rotation shaft 5A to the body portion 1C of the funnel 1 in the bottom surface 1E in a rectangular shape in a plan view, and extends in the radial direction with respect to the center line O.

The cutout 6 is formed with a step so that the end edge 6A on the side of the rotational direction R is lower than the end edge 6B on the opposite side of the rotational direction R. The size of the step in the direction of the center line O between the end edge 6A on the side of the cut-out 6 in the rotation direction R and the end edge 6B on the opposite side of the rotation direction R is, for example, about 30mm, and these end edges 6A and 6B extend substantially in parallel with each other.

Here, in the present embodiment, the bottom surface 1E is a plane perpendicular to the axis O from the end edge 6B on the opposite side of the rotation direction R of the notch 6 to a predetermined angular range (for example, 180 ° to 270 °) facing the opposite side of the rotation direction R and centered on the center line O in a plan view, and in a portion on the opposite side of the rotation direction R further from the angular range, the bottom surface 1E extends gradually downward toward the opposite side of the rotation direction R as shown in fig. 4, and thereby a step is provided so that the end edge 6A on the side of the rotation direction R of the notch 6 is lower than the end edge 6B on the opposite side of the rotation direction R.

Further, in the present embodiment, a discharge portion 7 that discharges the fibrous dewatering assistant cut out from the cut-out 6 is provided below the cut-out 6 formed in this manner. The discharge unit 7 includes: a hollow rectangular box-shaped cutout case 7A having upper end edges joined to the end edges 6A and 6B of the cutout 6 and the end edges 6C on the inner and outer peripheral sides with respect to the center line O and extending along the cutout 6, a discharge groove 7B having a U-shaped cross section having an upper end edge connected to a lower end edge of the cutout case 7A and extending along the cutout 6, and a screw conveyor 7C inserted into the discharge groove 7B, wherein a discharge case 7D is provided at a discharge end portion (left end portion in fig. 2) of the discharge groove 7B.

The screw conveyor 7C is provided with a helical screw blade 7B on the outer periphery of a screw shaft 7A extending along the center line of a semicircle formed in the cross section of the bottom of the discharge tank 7B, and the screw shaft 7A and the screw blade 7B are rotated by a screw rotating portion 7C such as a gear motor provided on the opposite side of the discharge end of the discharge tank 7B, whereby the fibrous dewatering agent dropped and discharged into the discharge tank 7B through the cutting tank 7A is conveyed to a discharge tank 7D, and the fibrous dewatering agent is supplied from a discharge port 7D opened at the lower portion of the discharge tank 7D to a sludge storage tank or the like located below the discharge port 7D. Further, an air nozzle 7e is provided in the discharge tank 7D, and the air nozzle 7e ejects pulse air obliquely upward from the discharge direction of the fibrous dewatering assistant discharged from the discharge groove 7B.

In the present embodiment, as shown in fig. 2, the upper end edge of the discharge groove 7B is located above the upper end edge of the screw blade 7B of the screw conveyor 7C so as to be spaced apart from the screw blade 7B. Further, the upper end portion of the discharge groove 7B between the lower end edge on the outer peripheral side of the cutout case 7A and the discharge case 7D and the upper end portion of the discharge groove 7B between the lower end edge on the inner peripheral side of the cutout case 7A and the end portion of the discharge groove 7B on the opposite side to the discharge end portion are covered with a rectangular plate-shaped lid body 7E.

In the apparatus for supplying a fibrous dewatering agent configured as described above, the fibrous dewatering agent such as a nonwoven fabric-producing material or the like introduced into the hopper 1 from the inlet is stirred by the rotation of the cutting blade 5B of the cutting portion 5, and is cut out from the bottom surface 1E of the hopper 1 by the cutting blade 5B from the outlet 6. The fibrous dewatering assistant cut out in this way falls into the discharge groove 7B through the cut-out box 7A of the discharge portion 7 as described above, is discharged from the hopper 1, is conveyed to the discharge box 7D by the screw conveyor 7C, is blown off by the pulse air discharged from the air nozzle 7e, and is supplied to a sludge storage tank or the like through the discharge port 7D.

In the device for supplying a fibrous dewatering agent having the above-described configuration, the step is provided so that the end edge 6A of the cut-out portion 5 on the side of the rotation direction R of the rotation axis 5A of the cut-out portion 5 in the cut-out 6 in the bottom surface 1E of the funnel 1 from which the fibrous dewatering agent is cut out and discharged is lower than the end edge 6B on the opposite side of the rotation direction R of the cut-out 6. Therefore, the fibrous dewatering aid cut out from the cut-out 6 is not caught by the end edge 6A on the side of the cut-out 6 in the rotation direction R when being pressed in the rotation direction R, but falls down from the cut-out 6 with the rotation of the cutting blade 5B and is smoothly discharged from the cut-out box 7A of the discharge portion 7 into the discharge groove 7B.

Therefore, according to the apparatus for supplying a fibrous dewatering assistant having the above-described configuration, even if the fibrous dewatering assistant is densely packed in the hopper 1, clogging of the cut-out 6 due to the bridging phenomenon can be prevented, and even a fibrous dewatering assistant that is likely to cause such a bridging phenomenon can be stably supplied from the discharge portion 7 to the sludge storage tank or the like. In addition, in the present embodiment, by smoothly discharging the fibrous dewatering assistant in this way, it is not possible to apply an excessive load to the rotating shaft 5A and the cutting blades 5B of the cutting section 5, and the power required for the rotational driving in the cutting blade rotating section 4 can be reduced.

In addition, in the present embodiment, since the funnel 1 is a bottomed cylindrical shape, the portion of the bottom surface 1E from the end edge 6B of the cutout 6 to the opposite side to the rotation direction R is perpendicular to the center line O, and the step difference of the end edge 6A with respect to the end edge 6B is also as small as about 30mm, the capacity in the funnel 1 can be secured to a large extent if the height from the lower end (end edge 6B) of the cutout 6 (funnel discharge port) to the upper end portion of the body portion 1C of the funnel 1 is the same as that of the supply device described in patent document 1 in which, for example, a portion continuous with the funnel discharge port of the funnel has a conical portion. Therefore, a larger amount of the fibrous dewatering aid can be held in the hopper 1, and the fibrous dewatering aid can be efficiently supplied.

However, in the present embodiment, the bottom surface 1E of the funnel 1 has such a plane perpendicular to the center line O, but the bottom surface 1E of the funnel 1 may have a conical portion in which the cutout 6 having the step difference as described above is formed, similarly to the supply device described in patent document 1. In this case, the cut-out blades 5B may be inclined at the lower end edge in accordance with the inclination of the conical portion of the bottom surface 1E.

Further, in the present embodiment, since the hopper 1 is supported on the stand 3 by the weight measuring unit 2 such as a weight sensor, the fibrous dewatering assistant can be quantitatively supplied to the sludge storage tank or the like in a predetermined cut-out amount for a certain period of time, for example, while measuring the weight of the fibrous dewatering assistant discharged from the hopper 1 and supplied to the sludge storage tank or the like. Therefore, the supply amount of the fibrous dewatering assistant can be accurately controlled, and the fibrous dewatering assistant can be supplied to the sludge storage tank or the like in a short amount.

Further, in the present embodiment, the cutout portion 5 includes a plurality of (two) cutout blades 5B, and the height of the upper end edge of at least a part of the cutout blades (one cutout blade) 5B in the direction of the center line O in the funnel 1 is set to a height different from (lower than) the height of the upper end edge of at least another part of the cutout blades (another cutout blade) 5B in the direction of the center line O in the funnel 1. Further, the inclination angles of the upper end edges of the plurality of cut-out blades 5B with respect to a plane perpendicular to the center line O are also different between at least a part of the cut-out blades (one cut-out blade) 5B and at least another part of the cut-out blades (another cut-out blade) 5B.

Therefore, as described above, when the ordinary fibrous dewatering agent is supplied, the upper end edges of the cutting blades 5B are set to be positioned lower than the upper surface of the fibrous dewatering agent held in the hopper 1, and the upper surface of the fibrous dewatering agent stirred by the cutting blades 5B whose upper end edges are set to different heights undulates like a wave. Therefore, the fibrous dehydration assistant does not entangle with each other and naturally breaks up and disperses due to such fluctuation of the fibrous dehydration assistant, and therefore the occurrence of the bridging phenomenon can be more effectively prevented.

In the present embodiment, the cut-out blades 5B are provided with the reinforcing ribs 5C, and the upper surfaces of the ribs 5C are inclined downward toward the opposite side to the rotational direction R, and the ribs 5C themselves are also inclined and extended downward toward the outer peripheral side. Therefore, even if the fibrous dewatering agent adheres to the upper surface of the rib 5C, the adhered fibrous dewatering agent is separated and flows downward or toward the outer peripheral side in accordance with the rotation of the cutting blade 5B, and therefore, it is possible to prevent the fibrous dewatering agent from accumulating on the upper surface of the rib 5C and failing to be supplied to the sludge storage tank or the like.

Further, in the present embodiment, the discharge portion 7 is provided in the cutout portion 6, and the discharge portion 7 includes: a discharge groove 7B having a U-shaped cross section extending along the notch 6 via the notch box 7A, and a screw conveyor 7C inserted into the discharge groove 7B, and the fibrous dewatering assistant is supplied to the sludge storage tank or the like by the screw conveyor 7C of the discharge portion 7. Therefore, compared to the supply device described in patent document 1, the amount of the fibrous dewatering assistant cut out from the hopper 1 and the amount of the fibrous dewatering assistant supplied to the sludge storage tank can be independently controlled. In the feeding device of patent document 1, a screw feeding section and fan-shaped blades are coaxially provided on a common rotating shaft rotatably disposed in a hopper.

Further, in the present embodiment, the upper end edge of the discharge groove 7B is located above the upper edge portion of the screw blade 7B of the screw conveyor 7C so as to be spaced apart from the upper edge portion of the screw blade 7B, and the fibrous dewatering assistant is dispersed and conveyed in the discharge groove 7B while expanding to the upper portion spaced apart from the upper edge portion. Therefore, the fibrous dewatering assistant can be prevented from being densely packed in the discharge tank 7B and from being bridged, and the fibrous dewatering assistant can be prevented from being supplied in a lump to a sludge storage tank or the like.

In addition, in the present embodiment, since the air nozzle 7e for ejecting the pulse air from the obliquely upper side in the ejection direction is provided in the ejection tank 7D in which the fibrous dewatering assistant ejected from the ejection portion 7 is supplied to the sludge storage tank or the like, the fibrous dewatering assistant can be more reliably dispersed and supplied to the sludge storage tank or the like. However, the discharge of the fibrous dewatering assistant from the hopper 1 to the sludge storage tank or the like is not limited to the discharge section 7 provided with the screw conveyor 7C as described above, and the fibrous dewatering assistant may be directly discharged from the cut-out 6 of the hopper 1 to the sludge storage tank or the like, discharged from the cut-out 6 while being sealed by a rotary valve, or discharged in combination with the opening and closing of a slide door or another automatic valve, for example.

By applying the apparatus for supplying a fibrous dewatering aid of the present application to the field, the fibrous dewatering aid is smoothly discharged and supplied to a sludge storage tank or the like.

Description of the reference numerals

1 funnel

Bottom surface of 1E funnel

2 weight measuring section

4-cut blade rotating part

5 cut out part

5A rotation axis

5B cut-out blade

5C Rib

6 cut out

Edge on the rotation direction R side of 6A notch 6

Edge of 6B cut-out 6 on the opposite side to the rotation direction R

7 discharge part

7B discharge groove

7C screw conveyor

7a screw shaft

7b screw blade

7c screw rotating part

7e air nozzle

Center line of O funnel 1

Direction of rotation of R rotary shaft 5A