JP3221616U - Filter structure of batcher plant - Google Patents

Abstract

The present invention provides a batcher plant in which splashing of a water-cement mixture does not occur. A batcher plant (10) has an open / close outlet (14c) at its lower end, a measuring container (14b) supplied with water and cement from a water supply unit (11) and a cement silo (12). A weighing mixer 14 having a weight scale for measuring the weight of water and / or cement, and a stirring blade 15 provided inside the measuring container 14 b for stirring and mixing water and cement, the upper edge 17 d is opened, and the metering mixer 14 And a storage tank 17 for receiving the water cement mixture discharged from the open / close outlet 14c. The open / close outlet 14c is provided with a filter 16 having a tubular portion and a mesh portion. The upper end of the cylindrical portion is attached to the opening / closing outlet 14c, and the lower end of the cylindrical portion extends below the upper edge 17d of the storage tank and is inserted into the storage tank. The mesh portion covers the lower end of the tube portion. [Selected figure] Figure 1

Description

  The present invention relates to the improvement of batcher plants.

  Cement milk, which is a mixture of cement powder and water, is produced by a batcher plant carried into the ground improvement site and used before it hardens. As such a batcher plant, for example, the one described in Patent Document 1 is known. The batcher plant described in Patent Document 1 includes a mixer tank, a material inlet provided at an upper portion of the mixer tank, and a measuring tank disposed above the mixer tank. Then place a cement bag bagged with a specified weight on the material temporary storage table next to the material input port, then break the cement bag and insert the contents (cement) into the mixer tank from the material input port and measure it. A predetermined amount of water contained in the tank is introduced into the mixer tank, and the mixture is stirred and mixed in the mixer tank.

Unexamined-Japanese-Patent No. 2006-175715

  In the batcher plant of Patent Document 1, there is a limit to the production capacity of cement milk because the cement bags are sequentially put in manually. Therefore, add a cement silo next to the batcher plant, measure the cement input weight while continuously injecting cement from the cement silo to the measuring tank, and stop the injection when the cement input weight reaches a predetermined value. It is conceivable to weigh cement.

  In order to further improve the production capacity, a stirring blade is provided inside the above-mentioned measuring tank, and after the measurement of water is completed in the measuring tank, additional cement is added to this measuring tank and stirring is performed while measuring cement. It is conceivable to stir and mix water and cement with blades and to batch produce cement milk inside the measuring tank.

  On the other hand, it is necessary to deliver slurry-like cement milk at a constant flow rate to the ground improvement body. For this reason, the storage tank for temporarily storing the slurry-like cement milk by which batch production was carried out, the pump etc. which pump-feed a slurry are needed.

  In this case, a filter such as a wire mesh is attached to the upper edge of the storage tank to capture the cement powder balls, because a small amount of cement powder does not dissolve in water inside the measuring tank and is mixed in cement milk in the form of beads. There is a need to.

  However, when the wire mesh is attached to the upper edge of the storage tank, cement milk spatters between the upper metering tank and the lower storage tank, resulting in contamination of the surroundings. In particular, when cement milk hardens and accumulates over time, cleaning is difficult.

  The present invention aims at providing an improved technique for a batcher plant in view of the above mentioned situation.

  For this purpose, the filter structure of the batcher plant according to the invention comprises a water supply, a cement supply, and a metering container having an open / close outlet at the lower end and supplied with water and cement from the water supply and the cement supply. A weighing scale connected to the measuring container for measuring the weight of water and / or cement in the measuring container, and a stirring blade provided inside the measuring container for stirring the water and the cement, the cement milk is obtained by the stirring. It has a measuring mixer to produce and a storage tank which is open at the upper edge and arranged on the lower side of the measuring mixer and receives cement milk discharged from the opening and closing outlet, and optional supply of cement milk from the storage tank to the outside In the structure provided in a batcher plant capable of supplying flow rate, the upper end is attached to the opening and closing outlet, the lower end is from the upper edge of the storage tank A cylindrical portion to be inserted into the storage tank and extends downwardly, characterized in that it comprises a mesh portion covering the lower end of the cylindrical portion.

  According to the present invention, the upper end of the cylindrical portion is connected to the opening and closing outlet, and the lower end of the cylindrical portion is inserted into the storage tank, so that cement milk is received by the storage tank after passing through the mesh portion. It is possible to prevent the milk from splashing outside the storage tank. The cement powder ball is captured by the mesh portion. The shape and structure of the measuring mixer and the storage tank are not particularly limited.

  The liquid level of the cement milk may be set so as to be within the range by setting a predetermined upper limit value and a predetermined lower limit value while fluctuating up and down inside the storage tank. As a preferable aspect of the present invention, while cement milk is being supplied at an arbitrary supply flow rate, the liquid level of cement milk is made equal to or higher than a predetermined lower limit inside the storage tank, and the lower end of the cylindrical portion is made equal to or lower than the predetermined lower limit. Ru. According to this aspect, it is possible to reliably prevent the cement milk from scattering outside the storage tank. In addition, the impact of cement milk on the mesh portion can be mitigated.

  The shape of the mesh portion is not particularly limited. It is preferable that the mesh part spacing be less than 1.0 cm. This makes it possible to supplement cement powder balls of 1 cm or more. As one aspect of the present invention, the mesh portion includes a cylindrical mesh portion extending further downward from the lower end of the cylindrical portion, and a lower end mesh portion covering the lower end of the cylindrical mesh portion. The mesh portion of this aspect is, for example, a cylindrical ridge having the same cross-sectional shape as the cylindrical portion. As another aspect, the mesh portion has a hemispherical shape or a disk shape.

  As a preferable aspect of the present invention, the opening / closing outlet is provided with an engaging portion, and the cylindrical portion is provided with an engaged portion which engages with the engaging portion. According to this aspect, since the cylindrical portion is detachably provided at the opening and closing outlet, the mesh portion can be easily cleaned. The engaging portion and the engaged portion are not particularly limited, and may be, for example, a protrusion and a recess that engage with each other, or an external thread and an internal thread. As another aspect, the cylindrical portion may be fixed to the opening / closing outlet by a connector such as a bolt.

  The shapes of the cylindrical portion and the opening / closing outlet are not particularly limited, but as a further preferable aspect of the present invention, the opening / closing outlet is cylindrical and the cylindrical portion is cylindrical and inserted along the outer peripheral surface of the opening / closing outlet The part is a protrusion, and the engaged part is a groove or a notch, and includes an introduction part extending downward from the upper edge of the cylinder part, and a locking part extending circumferentially from the lower end of the introduction part It further has a grasping part set up by the peripheral face of a part. According to this aspect, the tubular portion can be easily detached from the opening / closing outlet by the operator gripping and rotating the grip portion.

  As one aspect of the present invention, the batcher plant further includes an agitator provided inside the storage tank for stirring cement milk below the mesh portion. According to this aspect, the quality of cement milk can be maintained without the agitator interfering with the mesh portion. As another aspect, it is not necessary to provide an agitator in the storage tank.

  Thus, according to the present invention, it is possible to prevent cement milk from splashing outside the storage tank. Moreover, after completion of the construction, the tube portion and the mesh portion can be removed from the measuring mixer to easily clean the batcher plant.

FIG. 1 is a side view schematically showing a batcher plant provided with a filter structure according to an embodiment of the present invention. It is a side view which shows the filter structure of the embodiment. In FIG. 2, it is a side which shows the state which removed the filter from the opening-and-closing exit of the measurement mixer.

  Hereinafter, an embodiment of the present invention will be described in detail based on the drawings. FIG. 1 is a side view schematically showing a batcher plant according to an embodiment of the present invention, a part of which is shown in cross section. The batcher plant 10 includes a water supply unit 11, a cement silo 12, a screw conveyor 13, a measuring mixer 14, a filter 16, a storage tank 17, a frame 19, and a pressure feed pump and a control panel (not shown). Produces cement milk, which is a kind of water and cement mixture.

  Cement powder is stored in the cement silo 12. The cement silo 12 and the metering mixer 14 are supported from below by a frame 19. The screw conveyor 13 connects the lower end of the cement silo 12 and the upper end of the metering mixer 14 to supply cement powder to the metering mixer 14. The screw conveyor 13 incorporates a drive mechanism such as an electric motor and a screw. By changing the rotational speed of the internal screw, it is possible to adjust the cement supply amount per unit time. The water supply unit 11 is also connected to the upper end of the metering mixer 14, and the water supply amount per unit time can be adjusted.

  The measuring mixer 14 has a measuring container 14b, a stirring blade 15 provided in the measuring container 14b, and a scale (not shown) interposed between the frame 19 and the measuring container 14b. The measuring container 14b has a cylindrical side wall and a funnel-shaped bottom wall, and an open / close outlet 14c is provided at the lower end of the bottom wall. A filter 16 is detachably attached to the opening / closing outlet 14c.

  2 and 3 are enlarged views showing the opening / closing outlet 14c and the filter 16, and FIG. 2 shows a state where the filter 16 is attached and fixed to the opening / closing outlet 14c, and FIG. 3 shows a state where the filter 16 is removed from the opening / closing outlet 14c. Represents The open / close outlet 14c is cylindrical and directed downward. The filter 16 has a tubular portion 16 b, a mesh portion 16 c, and a grip portion 16 d. An open / close valve (not shown) is provided inside the upper end of the open / close outlet 14c. The on-off valve opens and closes by operation from the control panel. Further, the on-off valve interlocks with the weighing state of the weighing mixer 14, and is normally closed, but can be opened when the weighing is completed.

  The mesh portion 16c includes a cylindrical mesh portion 16f extending further downward from the lower end of the cylindrical portion 16b and a lower end mesh portion 16g covering the lower end of the cylindrical mesh portion 16f. The cylinder part 16b of this embodiment is a cylindrical wall of the both-ends opening shape which shape | molds a metal plate in a cylinder shape, and is extended in an up-down direction. The cylindrical mesh portion 16f is fixed to the lower end of the cylindrical portion 16b, and has a cross-sectional shape having substantially the same diameter as the cylindrical portion 16b. That is, the lower end mesh portion 16g is a circular net, and the mesh portion 16c is in the shape of a cylinder like a bowl. The upper end portion of the cylindrical mesh portion 16f is attached and fixed so as to overlap the outer peripheral surface of the cylindrical portion 16b.

  The mesh portion 16c is a single or multiple wire mesh, and the mesh spacing is a predetermined value included in the range of 0.5 cm to 1.5 cm at the most open position. That is, foreign matter of 0.5 cm or more, 1.5 cm or more, or the size of the range from the lower limit value to the upper limit value can not pass through the mesh portion 16 c and is captured by the filter 16. The mesh portion 16c of the present embodiment has a mesh spacing of 0.9 cm at the portion where the mesh is most opened.

  A projection 14d as an engaging portion is provided upright on the outer peripheral surface of the opening / closing outlet 14c. Two projections 14 d are provided at intervals of 180 ° at cylindrical opening and closing outlets 14 c.

  The cylindrical opening and closing outlet 14c is inserted into the cylindrical portion 16b, and the positions of the opening and closing outlet 14c and the cylindrical portion 16b in the vertical direction overlap. Thus, the cylindrical portion 16 is connected to the opening / closing outlet 14c without any gap. A notch 16 j as an engaged portion is formed at the upper end of the cylindrical portion 16 b. The notch 16 j includes an introducing portion 16 k extending downward from the upper edge of the cylindrical portion 16 b and a locking portion 16 l extending circumferentially from the lower end of the introducing portion 16 k. When the cylindrical portion 16b is inserted into and removed from the opening / closing outlet 14c, the projection 14d passes through the introduction portion 16k to be engaged with or disengaged from the locking portion 16l. While the projection 14d is engaged with the locking portion 161, the filter 16 is fixed so as not to come off at the opening / closing outlet 14c. The notch 16 j in the present embodiment is a slit extending in an L shape. As a modification not shown, the engaged portion may be a groove instead of a notch. Also, the locations of the projections and the notches may be interchanged.

  The grip portion 16d is provided upright on the outer peripheral surface of the cylindrical portion 16b. The filter 16 of the present embodiment is made of steel, and the grip portion 16 d is welded to the cylindrical portion 16 b. The filter 16 is rotated by the operator holding the grip portion 16d, and is attached to and detached from the opening / closing outlet 14c.

  The upper ends of the open / close outlet 14 c and the cylindrical portion 16 b are disposed above the upper edge 17 d of the storage tank 17. The lower end of the cylindrical portion 16 b and the mesh portion 16 c are disposed below the upper edge 17 d of the storage tank 17. That is, the filter 16 is disposed to be inserted into the storage tank 17. Further, the cylindrical portion 16b of the filter 16 serves as a passage that covers the falling cement milk not to be exposed between the opening / closing outlet 14c and the storage tank 17 which are separated in the vertical direction.

  Referring back to FIG. 1, the storage tank 17 is disposed below the measuring container 14 b and is separated from the measuring container 14 b and the filter 16. Thereby, the measuring mixer 14 eliminates the influence of the storage tank 17 at the time of measurement.

  An agitator 18 is provided inside the cylindrical storage tank 17. The agitator 18 is coaxially disposed on the circular bottom wall of the storage tank 17 and rotates along the circular bottom wall. An outlet (not shown) is provided below the storage tank 17, and a pressure feed pump (not shown) is connected to the outlet.

  In addition, although not shown in the figure, the frame 19 includes a drive mechanism for the stirring blade 15, a drive mechanism for the agitator 18, a drive mechanism for opening and closing the opening and closing outlet 14c, and electrical wiring or connection with each drive mechanism Air piping is attached.

  Next, the production process of cement milk will be described.

  First, the scale resets the weight of the empty weighing mixer 14. Next, the water supply unit 11 is opened, and while the water is supplied from the water supply unit 11 to the measuring mixer 14, the weighing scale measures the weight of water in the measuring mixer 14. When the weight of water reaches a predetermined value, the water supply unit 11 is closed.

  Next, the screw conveyor 13 is started, and while the cement powder is supplied from the cement silo 12 to the measuring mixer 14, the weighing scale weighs the cement weight inside the measuring mixer 14. When the cement weight reaches a predetermined value, the screw conveyor 13 is stopped. During driving of the screw conveyor 13, the stirring blade 15 may be rotating or may be stopped.

  Next, the stirring blade 15 is rotated to stir and mix water and cement powder until uniform. By finely dispersing the cement powder in water, an uncured slurry, ie, cement milk, is created.

  The upper edge 17d of the storage tank 17 is opened. The storage tank 17 is disposed immediately below the metering mixer 14 and receives cement milk discharged from its opening and closing outlet 14 c by its own weight. All cement milk discharged from the opening and closing outlet 14 c by its own weight passes through the filter 16. If cement powder balls or other foreign matter is mixed in the cement milk, these foreign matters are trapped by the filter 16. Then, the remaining slurry flows into the storage tank 17.

  The agitator 18 disposed inside the storage tank 17 rotates below the filter 16 in the cement milk accumulated in the lower part of the storage tank 17. Cement milk in the storage tank 17 is sucked by a pressure pump (not shown) and discharged to a ground improvement body (not shown) at an arbitrary supply flow rate. When the amount of cement milk in the storage tank 17 is reduced, cement milk is again batch-produced by the metering mixer 14 and added to the storage tank 17.

  The slurry liquid level H in the storage tank 17 fluctuates up and down while cement milk is supplied from the inside of the storage tank 17 to the outside. The slurry liquid level H is, of course, lower than the upper edge 17d, but in the present embodiment, the slurry liquid level H in the storage tank 17 is the lower end 16e of the cylindrical portion 16b except when the production of cement milk is finished. It can be set to be the same or higher. As a result, the mesh portion 16c dips the cement milk into the cement milk while being supplied from the inside to the outside of the storage tank.

  When the production of cement milk is over. As shown in FIG. 3, the filter 16 is removed from the opening 14c and is cleaned. In addition, the metering mixer 14 and the storage tank 17 are also cleaned.

  The upper end of the filter 16 according to this embodiment is attached to the opening / closing outlet 14c, and the lower end of the filter 16 extends below the upper edge 17d of the storage tank 17 and covers the lower end of the cylindrical portion 16b inserted into the storage tank 17. Since the mesh portion 16 c is provided, cement powder balls can be captured by the mesh portion 16 c and only uniform slurry can be supplied to the storage tank 17.

  Further, since the lower end region of the cylindrical portion 16 b is located below the upper edge 17 d of the storage tank 17, when the cement milk is supplied from the measuring mixer 14 to the storage tank 17, the cement milk may scatter to the outside of the storage tank 17. It can prevent. Although an open space in the vertical direction intervenes between the upper metering mixer 14 and the lower storage tank 17, cement milk flows in the cylindrical portion 16b of this embodiment. Thus, the cement milk is not exposed between the metering mixer 14 and the lower reservoir tank 17 during the flow.

  Further, when the mesh portion 16 c is always immersed in cement milk, when the cement milk is supplied from the measuring mixer 14 to the storage tank 17, not only the scattering of cement milk can be reliably prevented, but the falling slurry is a mesh The impact applied to the portion 16c can be mitigated.

  Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiment within the same or equivalent scope as the present invention.

  The present invention is advantageously used in civil engineering construction.

10 Batcher plants, 11 water supply units,
12 cement silos, 13 screw conveyors,
14 measuring mixer, 14b measuring container, 14c opening and closing outlet,
14d projection (engagement part), 15 stirring blades, 16 filters,
16b tube, 16c mesh, 16d grip,
16f cylindrical mesh, 16g lower mesh,
16j notch, 16k introduction part, 16l locking part,
17 storage tanks, 17d storage tank upper edge, 18 agitators.

Claims (6)

A weighing container having an open / close outlet at the lower end and supplied with water and cement, a weight scale connected to the weighing container for measuring the weight of water and / or cement in the weighing container, and provided inside the measuring container A metering mixer having a stirring blade for stirring and mixing the water and the cement;
And a storage tank open at the upper edge and disposed under the metering mixer to receive the water cement mixture discharged from the opening and closing outlet, and optionally supplying the water cement mixture from the storage tank to the outside In a structure provided to a batcher plant capable of supplying flow rate,
A cylindrical portion formed of a plate material, having an upper end attached to the opening and closing outlet, and a lower end extending downward than an upper edge of the storage tank and being inserted into the storage tank;
And a mesh portion covering the lower end of the cylindrical portion. During the supply at the arbitrary supply flow rate, the liquid level of the water-cement mixture is made equal to or higher than a predetermined lower limit inside the storage tank,
The filter structure of a batcher plant according to claim 1, wherein the lower end of the cylindrical portion is equal to or less than the predetermined lower limit value.   The batcher plant according to claim 1 or 2, wherein the mesh portion includes a cylindrical mesh portion extending further downward from the lower end of the cylindrical portion, and a lower end mesh portion covering the lower end of the cylindrical mesh portion. Filter structure. An engagement portion is provided at the opening and closing outlet.
The filter structure of a batcher plant according to any one of claims 1 to 3, wherein the cylindrical portion is provided with an engaged portion engaged with the engaging portion. The opening and closing outlet is cylindrical,
The cylindrical portion has a cylindrical shape, and is inserted along the outer peripheral surface of the opening / closing outlet,
The engagement portion is a protrusion,
The engaged portion is a groove or a notch, and includes an introduction portion extending downward from an upper edge of the cylindrical portion, and a locking portion extending circumferentially from a lower end of the introduction portion.
The filter structure of a batcher plant according to claim 4, further comprising a grip portion provided upright on the outer peripheral surface of the cylindrical portion. The batcher plant according to any one of claims 1 to 5, wherein the batcher plant further comprises an agitator provided inside the storage tank to agitate the water cement mixture below the mesh portion. Filter structure.

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