JP2016155665A - Fixed quantity feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixed quantity feeder that is capable of stably and continuously feeding fixed quantities of a feed material, even when the feed material is viscous soil with a comparatively high moisture content, and that has a relatively simple and inexpensive configuration.SOLUTION: A fixed quantity feeder 100 for feeding fixed quantities of a feed material is constituted of: a casing 101 into which the feed material is carried; and a screw type conveyor 121 installed below the casing 101 to transport the feed material fed from the casing 101. Further, the feeder includes a cylindrical tunnel part 122A that encloses the outer periphery of a spiral blade, on a downstream side in a conveyance direction of the spiral blade which is provided around a rotation center of the screw-type conveyor 121. In the feeder, the feed material conveyed while pressurized by the tunnel part 122A is discharged from an outlet 123 and fed downstream in fixed quantities.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technique for continuously and quantitatively supplying a supply of viscous earth and sand such as viscous soil and peat.

  Conventionally, various supply devices for cohesive soil have been proposed. For example, there is a device as described in Patent Document 1.

  As shown in FIGS. 8 (A) and 8 (B), this is a processing machine 31 (rotation driven) in a downstream process by continuously supplying a constant quantity of processing object such as earth and sand by a supply controller 211. The impactor 49 collides with the processing object to crush the processing object). The processing object is crushed into a predetermined size and mixed with quick lime at a predetermined ratio to purify the processing object and improve the soil quality. It is configured to perform processing such as.

  Here, the supply controller 211 which is a fixed amount supply device rotates a pair of rotating bodies (rollers 214A and 214B) in a drum (cylindrical) shape facing each other in a direction facing each other, and this pair of rotating bodies ( The processing object such as earth and sand supplied to the hopper 37 above the rollers 214A and 214B) is continuously passed through the facing gap between the pair of rotating bodies (rollers 214A and 214B), so that a constant amount of the processing object is obtained. Can be supplied (discharged) to the downstream process.

JP2012-120956A JP 2003-10900 A

  According to the supply controller 211 described in Patent Document 1 as described above, when the processing object is intermittently supplied from the backhoe or the like to the hopper 37, the processing object faces the pair of rotating bodies (rollers 214A and 214B). By passing through the gap, it is metered into a predetermined amount continuously (not intermittently) and supplied to the downstream side, so that the object to be treated and other materials (such as soil improvement materials) in the downstream process Can be stably mixed at a desired mixing ratio.

  However, when the water content ratio is high even if the object to be treated is a viscous soil or the like, the viscosity decreases and liquefies and flows out in an uncontrollable state. It cannot be supplied by the supply device.

  For this reason, when the soil which is liquefied is made into a process target object, supplying using the screw type conveyor etc. which are described in patent document 2, for example is also performed.

  However, even when using a screw-type conveyor, the degree of liquefaction and the viscosity differ due to differences in the properties of the clay and the water content ratio. There is a fact that it is difficult.

  In addition, when stable quantitative supply to the downstream process of the processing object cannot be performed, for example, in the field of earth and sand (soil) improvement, the processing target object (viscous soil, viscous soil mixed with fiber, mixed grass grass) It is difficult to continuously mix the clay (such as clay) with the improved (modified) material at a predetermined mixing ratio, resulting in variations in the amount of added (modified) material (mixing ratio), A desired improvement (reformation) effect cannot be obtained, resulting in a decrease in construction capacity.

  The present invention has been made in view of such circumstances, and has a relatively simple and low-cost configuration, and is a clay soil such as a clay soil, a clay soil mixed with fibers, and a clay soil mixed with grass roots, and has a relatively high water content. It is an object of the present invention to provide a quantitative supply device capable of supplying a supply continuously and stably in a fixed amount even when a supply having a high ratio is used.

Therefore, the quantitative supply device according to the present invention is
A quantitative supply device for quantitatively supplying an object to be supplied,
A casing into which the material to be supplied is carried;
A screw-type conveyor that is provided below the casing and conveys a material to be supplied from the casing;
Comprising
A cylindrical tunnel portion surrounding the outer periphery of the spiral blade on the downstream side in the conveying direction of the spiral blade provided around the rotation center of the screw conveyor;
The supply object conveyed while being pressurized by the tunnel part is discharged from the discharge port and quantitatively supplied downstream.

  In the present invention, the discharge port can be switched between a relatively narrow opening area and a relatively wide opening area.

In the present invention, the discharge port is configured to include a plate-like slide gate,
An opening with a relatively small opening area and an opening with a relatively large opening area are opened on the plate-shaped slide gate, and an opening with a relatively small opening area is obtained by sliding the plate-shaped slide gate. And an opening having a relatively large opening area can be switched.

  In the present invention, the opening having a relatively small opening area and the opening having a relatively large opening area are continuously formed, and are formed as one opening with respect to one plate-like slide gate. can do.

  In the present invention, a rotary blade device including a rotary blade that is driven to rotate may be provided below the screw-type conveyor in the lower part of the casing.

  The rotation axis of the rotary blade is arranged substantially horizontally so as to face a direction substantially orthogonal to the rotation center axis of the screw conveyor, and is provided in a plurality of rows along the rotation center axis of the screw conveyor. It can be.

  According to the present invention, although it is a relatively simple and low-cost configuration, viscous soil, such as clay soil, clay soil mixed with fibers, and clay soil mixed with grassroots, having a relatively high water content is supplied. Even if it is a case where it is a thing, the fixed_quantity | feed_rate supply apparatus which can supply a to-be-supplied material continuously and stably quantitatively can be provided.

(A) is a front view which shows an example of the whole structure of the fixed quantity supply system of one embodiment which concerns on this invention, (B) is a right view of (A), (C) is (A). It is a left side view, (D) is a top view of (A). (A) is a front view for demonstrating the structure of the tunnel part of the fixed quantity supply apparatus which concerns on embodiment same as the above, (B) is an AA 'arrow line view of (A), (C) is It is a BB 'arrow line view of (A). (A) is the perspective view which expands and shows the opening part of the discharge port of the fixed quantity supply apparatus utilized for the fixed quantity supply system which concerns on embodiment same as the above, (B) is the cross section seen from the X direction of (A). FIG. (A) is a top view of the gate which comprises the discharge port of the fixed quantity supply apparatus utilized for the fixed quantity supply system which concerns on embodiment same as the above, (B) is a side view of (A). It is a perspective view explaining a method of release when the discharge port of the quantitative supply device used in the quantitative supply system according to the embodiment is closed by foreign matter, (A) is a perspective view showing a closed state, (B) is a perspective view showing a sliding state of the gate, and (C) is a perspective view showing a state in which the foreign matter is discharged and the closed state is released. (A) is a plan view corresponding to FIG. 5, and (B) is a side view corresponding to FIG. (A) is sectional drawing explaining the arch action which generate | occur | produces in the hopper of a fixed amount supply apparatus, (B) is sectional drawing for demonstrating the effect (arch action cancellation effect) by having provided the rotary blade. is there. (A) is sectional drawing which shows an example of the conventional fixed quantity supply apparatus, (B) is a top view of (A).

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The present invention is not limited to the embodiments described below.

  Here, viscous soil, viscous soil mixed with fibers (for example, peat moss holding a large amount of peat and moisture), viscous soil mixed with grassroots, or a mixture thereof is referred to as “viscous soil” and is covered by the present invention. The feed is intended for the one containing this clay, especially for the case of quantitatively feeding a feed having different properties from plastic to liquid depending on the water content ratio.

As shown in FIGS. 1 (A) to 1 (D), the quantitative supply system (quantitative supply device) 100 according to the present embodiment is as follows.
A hopper (casing) 101 into which "viscous sediment" (supplied material) is intermittently or continuously charged by a backhoe or the like;
A constant-quantity supply unit 120 on the downstream side is crushed (unraveled) and / or fluidized (kneaded) while suppressing generation of an arch action while supplying the material accommodated in the hopper (casing) 101. A rotating blade device 110 that supplies (discharges and carries out)
A constant supply unit 120 that continuously supplies a supply object supplied from the rotary blade device 110 to a processing device (not shown) in a downstream process by a constant amount (predetermined amount);
It is comprised including.

  In addition, as a processing apparatus (not shown) on the downstream side of the quantitative supply unit 120, for example, an object to be supplied (supplied) from the quantitative supply unit 120 is placed on a belt conveyor or the like and improved ( A device for improving (reforming) the material to be supplied can be obtained by mixing the (reforming) material at a predetermined mixing ratio.

  Here, the rotary blade 111 of the rotary blade device 110 provided below or inside the hopper (casing) 101 is driven to rotate by an electric motor or the like, and the material to be supplied (viscous sediment) in the hopper (casing) 101 is crushed ( Unraveling and fluidization (kneading) are performed, and they are pushed into the screw conveyor 121 of the fixed amount supply unit 120.

  Further, the rotating blade 111A in the vicinity of the side wall cuts the edge of the support point of the arch formed by the arch action (a phenomenon in which the inside becomes hollow and the supply object becomes arched) as shown in FIG. As a result, as shown in FIG. 7B, it also serves to eliminate the occurrence of the arch action of the article to be supplied (viscous earth and sand).

  That is, when the material to be supplied is viscous soil or the like, an arch action is generated above the screw type conveyor 121 to form a cavity (see FIG. 7A), and the object to be supplied is good for the screw type conveyor 121 below. There is a risk that a supply failure such as the continuous supply of the material to be supplied cannot be performed or the supply itself becomes difficult.

  For this reason, in this Embodiment, it is hard to produce an arch action above the screw type conveyor 121, or even if it arises, an arch part can be dropped downward immediately (refer FIG.7 (B)). The rotating blades 111 of the rotating blade device 110 are arranged near the lower part of the hopper (casing) 101 (above the screw conveyor 121).

  According to the rotary blade 111 of the rotary blade device 110, the edge of the support point of the arch formed by the arch action (a phenomenon in which the inside becomes hollow and the supply object becomes an arch shape) can be cut. The supply can be satisfactorily supplied to the screw conveyor 121 below.

Next, the quantitative supply unit 120 according to the present embodiment will be described.
The quantitative supply unit 120 according to the present embodiment is configured as follows.
As shown in FIG. 1 (A) to FIG. 1 (D) and FIG. 2 (A) to FIG. 2 (C), the quantitative supply unit 120 includes a screw type conveyor 121 that is rotationally driven by an electric motor or the like, and a screw type. A tunnel chamber (pressurizing chamber) 122 that applies pressure to the material to be conveyed that surrounds the outer periphery of the front end side of the conveyor 121 (downstream in the conveyance direction of the material to be conveyed), and a predetermined pressurized object And an outlet 123 for discharging the supply.

  The screw-type conveyor 121 includes a rotation center shaft 121A that is rotationally driven by an electric motor or the like, and a screw (spiral blade) 121B that is spirally formed on the outer periphery of the rotation center shaft 121A. When the shaft 121A is rotated, the object to be supplied is transported toward the left direction (downstream in the transport direction) of FIG. 1 (A) or FIG. 2 (A) by a screw (spiral blade) 121B. .

  Then, the object to be supplied is conveyed from below the hopper 101 toward the left direction (downstream in the conveying direction) of FIG. 1 (A) and FIG. 2 (A) by the screw (spiral blade) 121B. Pressure chamber) 122.

  As shown in FIGS. 1 (A) to 1 (D) and FIGS. 2 (A) to (C), the tunnel chamber (pressure chamber) 122 has a predetermined gap around the outer periphery of the screw (spiral blade) 121B in the tunnel portion 122A. In addition, the space 122B surrounds the front end side of the screw (spiral blade) 121B, thereby forming a predetermined closed space on the front end side of the screw type conveyor 121. The space 122B communicates with the outside through a discharge port 123 provided below.

  As a result, the supply object conveyed by the screw (spiral blade) 121B is pressurized to a predetermined pressure in the tunnel chamber (pressure chamber) 122 and pushed out from the discharge port 123, so that the supply object has a relatively high water content ratio. Even if it is a highly viscous soil or the like, the material to be supplied can be transported in a constant amount (predetermined amount / unit time) in the left direction (downstream in the transport direction) in FIG.

  The supplies pressurized in the tunnel chamber (pressure chamber) 122 are sequentially discharged from the discharge port 123, and the discharge port 123 pressurizes the supply in the tunnel chamber (pressure chamber) 122 to a predetermined level. So that the opening area is set (adjusted) to a predetermined size.

In addition, the conveyance amount (discharge amount) of a to-be-supplied object can be adjusted by adjusting the rotational speed of the screw type conveyor 121 and the magnitude | size of the opening area of the discharge port 123, and actually, for example, 30-150 It can adjust in the range of cubic meter / h (m < ³ > / h).

  In this embodiment, as shown in FIGS. 3 and 4, the discharge port 123 is configured to include a slide gate type gate 123 </ b> A, and the gate 123 </ b> A is configured by providing an opening of a predetermined size in a plate-like element. ing. The size (opening area) and shape of the opening can be arbitrarily set according to, for example, the type and properties of the material to be supplied, the required transport speed, and the like.

  For example, as shown in FIGS. 3 and 4, the gate 123A includes a relatively narrow opening 123a and a relatively wide opening 123b formed adjacent to the opening 123a. It is switched according to the degree of pressurization in the tunnel part (pressurization part) 122 according to properties (water content ratio, viscosity, etc.) and used as the opening part of the discharge port 123.

  That is, as shown in FIG. 3, when the water content ratio of the viscous earth and sand is high and the viscosity is low, the relatively narrow opening 123 a of the gate 123 </ b> A is used as the discharge port 123. On the other hand, when the moisture content of the viscous earth and sand is low and the viscosity is high, the discharge amount is adjusted by adjusting the discharge amount (pressure adjustment in the tunnel chamber 122) by sliding the gate 123A and switching to the relatively wide opening 123b. Stable quantitative supply can be performed.

  In addition, the width of the openings (123a, 123b) when viewed in the plane of FIG. 3A is made narrower than the screw diameter (outer diameter) of the screw (spiral blade) 121B, and the tunnel portion 122A is provided. In this way, the pressure in the vicinity of the discharge port can be maintained at a predetermined value, whereby the viscous sediment can be stably discharged quantitatively.

  Further, in the present embodiment, as shown in FIG. 2, the inner side of the tunnel portion 122A is formed in a cylindrical shape slightly larger than the outer diameter of the screw (spiral blade) 121B, thereby being supplied by the screw (spiral blade) 121B. It has a configuration that does not push back objects.

  That is, an object to be supplied, which is pushed to the space 122B side by a predetermined pressure by the rotational conveyance of the screw (spiral blade) 121B, is supplied to the back surface of the screw (spiral blade) 121B (right side surface in FIG. 2A). Is suppressed by the tunnel portion 122A, so that pushing back (back flow) can be effectively suppressed.

  The sliding gate type gate 123A can automatically switch between the opening 123a and the opening 123b by a remote operation or the like by an actuator such as an air cylinder, a hydraulic cylinder, or an electric motor. It is also possible to switch manually.

  Further, since the opening of the sliding gate type gate 123A of the discharge port 123 can be switched between the opening 123a and the opening 123b as in the present embodiment, there are the following advantages.

  That is, foreign matters such as stones and clay soil blocks can be easily removed when the opening 123a of the discharge port 123 is closed.

  As shown in FIGS. 5A to 5C (FIGS. 6A and 6B), when a foreign matter is blocked in the opening 123a of the discharge port 123, the gate 123A is slid ( 5 to the front and FIG. 6 to the left), the opening 123b having a large rear opening area is moved into the discharge port, and the opening is widened to discharge foreign matter together with the viscous soil. Can do.

  As described above, according to the quantitative supply system 100 according to the present embodiment, since no arch action is generated in the hopper (casing) 101, the material to be supplied is excellent with respect to the downstream quantitative supply unit 120. Therefore, the quantitative supply unit 120 can perform good quantitative supply.

  Moreover, in this Embodiment, the to-be-supplied material which conveys the fixed_quantity | feed_rate supply part 120 surrounding the outer periphery of the screw type conveyor 121 and the front end side (downstream direction of a to-be-supplied material) of this screw type conveyor 121. Since it is configured to include a tunnel chamber (pressure chamber) 122 that applies pressure to an object and a discharge port 123 that discharges a predetermined pressurized object, it is conveyed by a screw (spiral blade) 121B. Since the supplied material can be pressed to a predetermined pressure in the tunnel chamber (pressurizing chamber) 122 and pushed out from the discharge port 123, it is good even if the material to be supplied is a viscous soil having a relatively high water content. It is possible to supply (convey) the material to be supplied at a constant amount (predetermined amount / unit time).

  Further, in this embodiment, a slide gate system is adopted as the discharge port 123, and the gate 123A is configured to include an opening 123a having a relatively small opening area and an opening 123b having a relatively large opening area. Thus, the opening area of the discharge port 123 is switched according to the degree of pressurization in the tunnel part (pressurization part) 122 according to the properties (water content ratio, viscosity, etc.) of the supply object, and from the discharge port 123 Since the discharge amount adjustment (pressure adjustment in the tunnel chamber 122) can be performed, it can greatly contribute to the realization of a stable quantitative supply.

  In this embodiment, a slide gate method is adopted as the discharge port 123, and the gate 123A is configured to include an opening 123a having a relatively small opening area and an opening 123b having a relatively large opening area. Therefore, when foreign matter such as a stone or a block of clay soil closes the opening 123a of the discharge port 123, the foreign matter can be easily removed by sliding the gate 123A to widen the opening of the discharge port 123. Can be removed.

  As described above, according to the present embodiment, although it is a relatively simple and low-cost configuration, it is a viscous soil such as a viscous soil, a viscous soil mixed with fibers, a viscous soil mixed with grassroots, and the like. Even when a product having a high water content ratio is used as a supply, it is possible to provide a quantitative supply device capable of continuously and stably supplying a constant supply of the supply.

  In this embodiment, as shown in FIGS. 1A and 1D, the rotary blade device 110 provided near the lower portion of the hopper (casing) 101 (above the screw conveyor 121). Three axes of rotating blades 111 are provided, and these three axes are arranged substantially horizontally so as to face a direction substantially orthogonal to the rotation center axis (longitudinal axis) of the screw conveyor 121, and serve as the rotation center axis of the screw conveyor. However, the present invention is not limited to this, and it may be uniaxial or may be composed of multiple rows of two or more axes.

  Further, the direction of rotation of the three-axis rotating blade 111 is not limited to the example shown in FIG. 2A, and the generation of arch action is effectively suppressed according to the type and properties of the supply object. It is possible to appropriately change the rotation direction of each rotary blade 111 so that it can be performed.

  In the present embodiment, the case where the rotary blade device 110 (the rotary blade 111) is provided has been described. However, the present invention is not limited to this, and the rotary blade is used when no arch action or the like occurs. The device 110 can be omitted.

  Further, in this embodiment, the configuration example including the tunnel portion 122A and the space 122B as the tunnel chamber 122 has been described, but the present invention is not limited to this, and the transport direction of the tunnel portion 122A A discharge port 123 can be provided on the downstream side and the space 122B can be omitted.

  In addition, according to the quantitative supply system according to the present embodiment, it is easy to use a viscous soil, such as a viscous soil, a viscous soil mixed with fibers, or a viscous soil mixed with grass roots, having a relatively high water content as a supply object. Therefore, it is possible to perform the purification process of the remaining soil generated in the construction work and the like relatively efficiently, thereby contributing to the effective use of the remaining soil.

  Furthermore, according to the quantitative supply system according to the present embodiment, since stable quantitative supply can be performed, it is possible to promote the homogenization of the mixing of the improving material (modifying material), etc. It can contribute widely in the field of processing clay soils with relatively high water content, such as clay soils of soil and clay soil mixed with grassroots.

  The embodiments according to the present invention described above are merely examples for explaining the present invention, and various modifications can be made without departing from the gist of the present invention.

100 Constant supply system 101 Hopper (casing)
DESCRIPTION OF SYMBOLS 110 Rotating blade apparatus 111 Rotating blade 120 Fixed supply apparatus 121 Screw type conveyor 122 Tunnel chamber (pressurizing chamber)
122A Tunnel 122B Space 123 Discharge port (slide gate method)
123A Gate (slide gate)
123a opening (relatively small opening area)
123b Opening (relatively large opening area)

Claims (6)

A quantitative supply device for quantitatively supplying an object to be supplied,
A casing into which the material to be supplied is carried;
A screw-type conveyor that is provided below the casing and conveys a material to be supplied from the casing;
Comprising
A cylindrical tunnel portion surrounding the outer periphery of the spiral blade on the downstream side in the conveying direction of the spiral blade provided around the rotation center of the screw conveyor;
A fixed quantity supply device characterized in that a supply object conveyed while being pressurized by the tunnel part is discharged from a discharge port and supplied in a fixed quantity downstream.   The quantitative supply device according to claim 1, wherein the discharge port is configured to be able to switch between a relatively narrow opening area and a relatively wide opening area. The discharge port is configured to include a plate-like slide gate,
An opening with a relatively small opening area and an opening with a relatively large opening area are opened on the plate-shaped slide gate, and an opening with a relatively small opening area is obtained by sliding the plate-shaped slide gate. The quantitative supply device according to claim 1, wherein the metering device can be switched between an opening having a relatively large opening area.   The opening portion having a relatively small opening area and the opening portion having a relatively large opening area are formed continuously, and are formed as one opening with respect to one plate-like slide gate. The quantitative supply device described in 1.   The quantitative supply device according to claim 1, further comprising a rotary blade device configured to include a rotary blade that is rotationally driven below the screw-type conveyor in the casing.   The rotation axis of the rotary blade is arranged substantially horizontally so as to face a direction substantially orthogonal to the rotation center axis of the screw conveyor, and is provided in a plurality of rows along the rotation center axis of the screw conveyor. The fixed-quantity supply apparatus of Claim 5.

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