JP6843447B2 - Concrete slurry processing equipment - Google Patents

Description

The present invention relates to a concrete slurry processing apparatus that appropriately treats muddy water-like concrete slurry (also referred to as cement sludge) discharged when a drum of a concrete mixer truck is washed.

As is well known, in a ready-mixed concrete factory, it is necessary to inject washing water into the drum of a concrete mixer truck that has delivered the ready-mixed concrete and returned to the factory for cleaning, and the ready-mixed concrete remaining in the drum at that time (return). A large amount of concrete) is discharged together with the washing water.
In the processing apparatus shown in Patent Document 1 below, the concrete slurry discharged in this way is put into a water tank, solids such as gravel, sand, and cement are settled on the bottom surface of the water tank, and the chain conveyor is driven at a low speed. This allows the solid content to be slowly scraped up, while a drainage gate is provided on one side of the water tank in which a plurality of cylindrical members (hereinafter referred to as pipes) are stacked in a horizontal manner to remove moisture in the concrete slurry. It flows out from a slight gap between each pipe, this water is reused as washing water, and the solid content scraped up by the chain conveyor is solidified by the hydration reaction of cement, so that it can be reused for roadbed materials and the like. It is a concrete slurry processing device to be used.
Further, the processing apparatus shown in Patent Document 2 below promotes the discharge of supernatant water by rotating the pipes constituting the drainage gate to expand the gaps between the pipes in a timely manner, and solids between the pipes. It is designed to prevent clogging by objects.
Further, in the treatment apparatus shown in Patent Document 3 below, a partition plate is provided upright in the center of the width direction of the water tank so as to be parallel to the longitudinal direction of the water tank, and the water tank is provided in the first region and the second region. By providing a drainage gate in the second region as well as partitioning into, the concrete slurry put into the first region makes a U-turn on the partition plate and flows to the second region, and the moisture in the concrete slurry flows into the drainage gate. A guide rail for returning the concrete chain is arranged above the partition plate so that the concrete can be discharged from the water tank, and an endless concrete chain with rakes attached at appropriate intervals extends from the bottom surface portion of the water tank to the inclined surface portion. By extending the guide rail as the outward route and driving the chain conveyor, the rake moves from the bottom surface portion of the water tank along the inclined surface portion to the first region and the second region. The solid content settled in the area is lifted up to the inclined surface by the rake, so that the solid matter in the concrete slurry has a sufficient residence time to settle even if the water tank is not so large. As a result, the solid matter is easily settled in the water tank, and the inside of the water tank is not agitated by the returning chain conveyor.

Japanese Patent No. 4277057 Japanese Patent No. 5638487 Japanese Unexamined Patent Publication No. 2019-18454

By the way, in such a concrete slurry processing apparatus, solid matter such as cement adhering to the conveyor chain falls into the water tank from the conveyor chain returning above the water tank, and the solid matter makes the water tank turbid. There was a risk. Therefore, it has been considered to have a structure in which a top plate is provided above the water tank to receive the solid matter separated from the conveyor chain by the top plate, but the solid matter separated from the conveyor chain collects on the top plate and solidifies. As a result, there was a risk that the conveyor chain would not move smoothly.
The present invention attempts to solve such a problem.

Therefore, in the concrete slurry processing apparatus according to the present invention, the bottom surface portion of the water tank having a rectangular shape in a plan view is formed substantially horizontally, and an inclined surface portion extending diagonally upward from the bottom surface portion is formed on the front edge of the water tank, and the inclination thereof is formed. A sprocket that is rotationally driven by a drive mechanism is provided at the upper end of the surface portion, and a partition plate is provided upright in the center of the width direction of the water tank so as to be parallel to the longitudinal direction of the water tank, and the water tank is designated as the first region. By partitioning the space above the water tank into the second area and also partitioning the space above the water tank by the partition plate, the concrete slurry discharged from the concrete mixer truck hits the partition plate and is put into the first area of the water tank. The first region and the second region are communicated with each other as a water passage portion as a gap between the front edge of the partition plate and the inclined surface portion, and a drain gate is provided in the second region. The concrete slurry charged into the first region makes a U-turn in the water passage portion so that the water in the concrete slurry flows to the second region so that the water in the concrete slurry is discharged from the drain gate, and a trough is placed above the partition plate. Supporting the top plate of the shape, a plurality of rakes are attached to the endlessly formed conveyor chain at appropriate intervals so that the tip edge faces the outer circumference, and a plurality of rakes are attached so that the tip edge faces the inner circumference. The scraper is attached to the conveyor chain at appropriate intervals, and the conveyor chain is wound around the sprocket so as to rotate around the top plate as the outward path from the bottom surface portion to the inclined surface portion of the water tank. The solid matter settled on the inner bottom of the water tank is scraped up to the inclined surface portion by the rake, and the solid matter on the top plate is moved rearward by the scraper to move the solid matter to the passage of the first region in the water tank. It is characterized in that it is dropped to a part away from the water part.

Since the solid matter separated from the conveyor chain being returned falls to a portion of the water tank away from the water passage portion of the first region, it is difficult to make the water tank turbid, and the separation of water and solid matter in the water tank is promoted. To. In addition, since solid matter is prevented from accumulating on the top plate and solidifying during operation, the conveyor chain is always moved smoothly.

The vertical sectional view of the concrete slurry processing apparatus which shows the embodiment of this invention. The plan view of the concrete slurry processing apparatus which shows the embodiment of this invention. FIG. 1 is a cross-sectional view taken along the line AA of FIG. FIG. 1 is a cross-sectional view taken along the line BB of FIG. FIG. 1 is a cross-sectional view taken along the line CC of FIG. FIG. 2 is a view taken along the line DD of FIG. The perspective view of the conveyor chain of the concrete slurry processing apparatus which shows embodiment of this invention. The perspective view of the conveyor chain of the concrete slurry processing apparatus which shows embodiment of this invention. The enlarged view which shows the operating state of the rake of the concrete slurry processing apparatus which shows the embodiment of this invention. A partially enlarged view of FIG. FIG. 1 is an enlarged cross-sectional view taken along the line EE of FIG.

As shown in FIGS. 3 and 4, the water tank 1 is a rectangular shape in a plan view having an open upper surface composed of both side plates 2 and 3 made of steel plates, a rear side plate 4, and a horizontal bottom surface portion 5. An inclined surface portion 6 extending diagonally upward from the bottom surface portion 5 is formed on the front edge of the water tank 1. As shown in FIG. 1, the inclined surface portion 6 is supported by the support column 6a so as to be inclined by about 30 degrees with respect to the horizontal plane, and a discharge port 9 is provided at the upper end portion of the inclined surface portion 6, and the inclined surface portion 6 is provided. Side wall plates 7 and 8 are formed on both side edges of the above.
Further, a partition plate 10 made of a steel plate is provided in an upright position substantially in the center of the water tank 1 in the width direction so as to be parallel to the longitudinal direction of the water tank 1, and the inside of the water tank 1 is filled with the partition plate as shown in FIG. It is divided into a first region 1a and a second region 1b by 10. The front edge of the partition plate 10 does not reach the inclined surface portion 6, and there is a gap between the front edge of the partition plate 10 and the inclined surface portion 6, and the gap is used as the water passage portion 11. The 1st region 1a and the 2nd region 1b are communicated with each other by the water passage portion 11. Further, the partition plate 10 has a height of 3 m or more from the ground, and the space above the water tank 1 is also partitioned by the partition plate 10. Therefore, as shown in FIG. 1, even if the concrete slurry is vigorously discharged from the drum of the concrete mixer truck 80, the concrete slurry hits the partition plate 10 to ensure that the concrete slurry is in the first region 1a. I am trying to put it in.

Further, a plurality of columns 20 made of channel members are established at appropriate intervals on the outer surface sides of the side plates 2 and 3 of the water tank 1, and a plurality of horizontal members laid horizontally on the respective columns 20. 21 crosses over the upper end portion of the partition plate 10, and the horizontal member 21 supports the gutter-shaped top plate 22 so as to be substantially horizontal but slightly inclined toward the rear of the water tank. There is. The top plate 22, as shown in FIG. 4, the side plates 85a on both side edges upper surface is opened, 85b inner partition plate 86 is formed with is formed, the top plate 22 by intermediate partition plate 86 Is divided into a first region 22a and a second region 22b. Guide rails 23a to 23d made of flat bars are laid on the inner bottom surfaces of the first region 22a and the second region 22b so as to be parallel to the longitudinal direction of the water tank 1, respectively. As shown in FIG. 6, the arc-shaped portion 24 formed in a downward arc shape is supported by the support column 20 established at the rear portion of the water tank 1, and the guide rails 23a are supported on the inner bottom surface of the arc-shaped portion 24, respectively. The downward arc-shaped turning rails 24a to 24d are fixed so as to be connected to the rear end portion of the ~ 23d.
A drop port 87 for allowing solid matter to flow down is provided at the rear end of the second region 22b of the top plate 22, and an inclined chute 88 is provided under the drop port 87 as shown in FIG. Is provided, the inclined chute 88 is passed through the partition plate 10, and the tip edge of the inclined chute 88 extends over the first region 1a of the water tank 1.

Further, a support shaft 25 is horizontally laid horizontally between the side plates 2 and 3 at the rear portion of the water tank 1, and disk-shaped guide wheels 26a to 26d are firmly fixed to the support shaft 25 at appropriate intervals.
Further, as shown in FIGS. 10 and 11, an arcuate surface bottom plate 5a is formed so that the boundary between the bottom surface portion 5 and the inclined surface portion 6 of the water tank 1 is gently connected, and the arcuate surface bottom plate 5a is located. Guide members 27a and 27b are provided at opposite portions of the side plates 2 and 3, respectively, and both ends of the horizontal rod 29 are slidably supported in the guide grooves 27c formed in the guide members 27a and 27b. Then, the fan-shaped plates 31a to 31d are fixed to the horizontal rod 29, and the arc-shaped pressing rails 32a to 32d are fixed to the outer periphery of the tip portion of each of the fan-shaped plates 31a to 31d. Further, the brackets 30a and 30b are fixed to the support column 20 at the upper portion of the guide members 27a and 27b, the screw shaft 30c is inserted into the brackets 30a and 30b, and the nut 30d and the bracket screwed to the screw shaft 30c. A coil spring 30e is arranged between the 30a and 30b in a compressed state, and the lower ends of the screw shafts 30c are brought into contact with the outer periphery of the base of the fan-shaped plates 31a and 31d near both ends of the horizontal rod 29. Therefore, the horizontal rod 29, the fan-shaped plates 31a to 31d, and the pressing rails 32a to 32d are elastically pressed by the coil spring 30e toward the arcuate bottom plate 5a. A stopper nut 30f that limits this pressing area is screwed to the upper end of each screw shaft 30c. Therefore, the height and pressing pressure of the pressing rails 32a to 32d can be adjusted by finely adjusting the screwing portions of the nut 30d and the nut 30f with respect to the screw shaft 30c.

Further, as shown in FIGS. 1 and 2, the rotating shaft 35 is rotatably supported by providing bearings 34a and 34b near the upper ends of the side wall plates 7 and 8 of the inclined surface portion 6, and the rotating shaft 35 is rotatably supported. Four sprocket 36a to 36d are fixed at appropriate intervals, and an installation base 38 is constructed on the upper portion of the side wall plate 7 to support a drive mechanism 39 including a motor and a speed reducer on the installation base 38. The transmission chain 42 is wound around the sprocket 40 fixed to the rotation output shaft of the drive mechanism 39 and the sprocket 41 fixed to one end of the rotation shaft 35, and the transmission chain 42 is operated by operating the drive mechanism 39. The rotating shaft 35 is rotationally driven via the sprocket 36a to 36d so that the sprocket 36a to 36d are rotated at a low speed in the direction of the arrow.

Next, the four conveyor chains 51a to 51d will be described with reference to FIGS. 7 to 9. Although FIGS. 7 to 9 show only two conveyor chains 51a and 51b, the same configuration is used for the conveyor chains 51c and 51d. Each of the conveyor chains 51a to 51d is formed in an endless shape (annular shape) by chaining a large number of links 45 with a roller 46 in between, and at a fixed number of intervals in the longitudinal direction among the large number of links 45. A link is interposed in which a mounting piece 45a bent in an L shape is integrally formed on the outside. Then, using the mounting piece 45a, a plurality of rakes 52a and 52b are attached to the conveyor chains 51a to 51d at appropriate intervals so that the tip edge 52a'and the tip edge 52b' are oriented toward the outer circumference of the ring. A plurality of scrapers 90a and 90b are fastened so that the tip edge 90a'and the tip edge 90b' are in the direction of the inner circumference of the ring. The rakes 52a and 52b have a rectangular plate shape, and are fixed to the mounting bracket 53a by a seat plate 58 and bolts and nuts 59. Further, the scrapers 90a and 90b are plate-shaped and smaller than the rakes 52a and 52b, and are located between the conveyor chains 51a and 51b and the rectangular ones and the outside of the conveyor chains 51a and 51b, respectively. It is composed of a small substantially square plate, and both have a narrow size such that the tip edge 90a'and the tip edge 90b' do not protrude as much as the rakes 52a and 52b. Then, the scrapers 90a and 90b are fixed to the mounting bracket 91a by the seat plate 92 and the bolts and nuts 93, and the mounting bracket 53a and the mounting bracket 91a are inserted into the mounting piece 45a with the bolt 45b. Be attached.

Then, by passing the conveyor chains 51a to 51d through the outer periphery of the guide wheels 26a to 26d and the lower side of the pressing rails 32a to 32d as shown in FIG. 11, the conveyor chains 51a to 51d are passed through the water tank 1. The conveyor chains 51a to 51d are wound around the sprockets 36a to 36d while being stretched from the bottom surface portion 5 to the inclined surface portion 6, and the conveyor chains 51a to 51d are as shown in FIGS. Further, the rollers 46 are supported so as to be in sliding contact with the guide rails 23a to 23d of the top plate 22 and the turning rails 24a to 24d, respectively. Further, the conveyor chains 51a to 51d are lowered along the turning rails 24a to 24d and wound around the outer circumferences of the guide wheels 26a to 26d in the water tank 1 so as to be along the bottom surface 5 of the water tank 1. The conveyor chains 51a to 51d are wound in a large annular shape.

As a result, when the drive mechanism 39 is operated, the conveyor chains 51a to 51d are pulled by the sprockets 36a to 36d and move in the directions shown by the arrows in FIG. 1 over the bottom surface portion 5 and the inclined surface portion 6 of the water tank 1. Then, the rakes 52a and 52b are slowly moved from the bottom surface portion 5 along the inclined surface portion 6 at a low speed. Then, the conveyor chains 51a to 51d turned upward by the sprockets 36a to 36d are supported on the guide rails 23a to 23d and returned to the rear, and are turned downward along the turning rails 24a to 24d in the water tank 1. By entering and sliding on the outer periphery of the guide wheels 26a to 26d, the vehicle advances forward along the bottom surface 5 and circulates again. In this way, the conveyor chains 51a to 51d are stretched in a large ring shape so that the bottom surface portion 5 of the water tank 1 to the inclined surface portion 6 is the outward path and the guide rails 23a to 23d are the return paths.

The conveyor chains 51a and 51b advance the first region 1a of the water tank 1 toward the inclined surface portion 6, and the conveyor chains 51c and 51d advance the second region 1b of the water tank 1 toward the inclined surface portion 6. Since the rake 52a is fixed to the conveyor chain 51a and the conveyor chain 51b as described above, and the rake 52b is fixed to the conveyor chain 51c and the conveyor chain 51d, one of the rakes 52a is the first. The rake 52b moves toward the inclined surface portion 6 while rubbing the bottom surface of the first region 1a, and the other rake 52b moves toward the inclined surface portion 6 while rubbing the bottom surface of the second region 1b.
Also, conveyor chain 51a, when 51b is that back retrace is supported on the top plate 22, as shown in FIG. 4, the scraper 90a, while rubbing the bottom surface of the first zone 22a of the top plate 22 The scraper 90b moves backward while rubbing the bottom surface of the second region 22b.

On the other hand, as shown in FIGS. 5 and 6, a plurality of pipes 60a to 60g are vertically arranged at the end of the side plate 3 at a portion of the water tank 1 away from the water passage portion 11 of the second region 1b. A drainage gate 61 is provided so as to be stacked horizontally and horizontally in the plane so that the drainage gate 61 forms a part of the side plate 3 of the second region 1b of the water tank 1. Specifically, the drain gate 61 is formed in a gate shape by providing horizontal columns 62c between columns 62a and 62b made of channel members established at appropriate intervals, and a plurality of the drain gates 61 are formed between the columns 62a and 62b. By loosely fitting both ends of the pipes 60a to 60g, the pipes 60a to 60g are stacked in line contact with each other, and the pressing member 66 is pressed by the rod 64 and the spring 65 anchored to the horizontal column 62c. The pressing member 66 is urged downward so that the pressing member 66 is brought into contact with the upper surface of the uppermost pipe 60a to elastically push down the pipes 60a to 60g. Then, the levers 67b to 67g are projected from the outer peripheral surface of the pipes 60b to 60g located below the pipe 60a, and the operating rods of the fluid pressure cylinders 68b to 68g supported by the horizontal column 62c are provided with the levers 67b to 67g. Each of the pipes 60b to 60g rotates by connecting to the tip of the pipe via a pin and expanding and contracting the fluid pressure cylinders 68b to 68g. Wedge-shaped protrusions 69 are fixed to the outer peripheral surfaces of the pipes 60b to 60g near both ends, and when the pipes 60b to 60g are rotated, the protrusions 69 intervene between the pipes 60a to 60g. The gap between each of the pipes 60a to 60g is appropriately expanded so that clogging is eliminated.
Reference numeral 70 denotes an overflow gutter provided on the rear plate 4 of the water tank 1.

In the concrete slurry processing apparatus configured as described above, as shown in FIG. 2, the concrete mixer truck 80 is stopped next to the water tank 1 so as to face the first region 1a, and the concrete mixer truck 80 is muddy. Concrete slurry is charged into the first region 1a. Since the partition plate 10 is formed tall, the concrete slurry discharged from the concrete mixer truck 80 does not directly enter the second region 1b.
Then, the concrete slurry charged into the first region 1a flows through the first region 1a toward the water passage portion 11 along the partition plate 10 as shown by the arrow of the breaking line in FIG. 3, and the water passage portion It makes a U-turn at 11 and flows to the second region 1b, and reaches the drain gate 61 provided at the end of the second region 1b. When the concrete slurry flows through the partition plate 10 in a U-turn in this way, it takes a long time for the concrete slurry to reach the drain gate 61, and solids such as gravel and sand in the concrete slurry settle. Sufficient residence time can be obtained.

Then, by operating the drive mechanism 39 to rotate the conveyor chains 51a to 51d, the rakes 52a and 52b slowly push the solid matter 71 deposited on the bottom surface portion 5 toward the inclined surface portion 6, so that the solid matter 71 Is lifted up to the inclined surface portion 6. Then, as the solid matter 71 slowly moves upward on the inclined surface portion 6, most of the water adhering to the solid matter 71 flows down on the inclined surface portion 6 and returns to the water tank 1. Therefore, by moving the solid material 71 to the upper side of the inclined surface portion 6, the drainage is improved, and the solid material 71 having a small water content is discharged from the discharge port 9. The solid material 71 discharged from the discharge port 9 is solidified into a hard mass by the hydration reaction of cement, and is therefore disposed of as stable waste.

The water that has flowed to the drain gate 61 provided in the second region 1b is discharged to the outside of the water tank through the gap between the pipes 60a to 60 g of the drain gate 61, and the discharged water is a tank (not shown). After being temporarily stored in the concrete mixer truck 80, it is reused as washing water or the like when washing the concrete mixer truck 80. The drainage gate 61 is stacked so that a plurality of pipes 60a to 60g are in line contact with each other, and the pipes 60a to 60g are elastically pushed down by the pressing member 66 from above, so that the drainage gate 61 flows to the drainage gate 61. Solid matter such as fine sand in the concrete sludge that still remains even after coming is blocked by the pipes 60a to 60g, while water flows out of the water tank through a slight gap between the pipes 60a to 60g. Then, by expanding and contracting the cylinders 68b to 68g at an appropriate time, the pipes 60b to 60g rotate, and the protrusions 69 are sandwiched between the pipes 60a to 60g, and the pipes 60a to 60g are inserted. The gap can be expanded.

Further, when the conveyor chains 51a to 51d scrape the solid matter 71 onto the inclined surface portion 6, the solid matter comes onto the top plate 22 with a part of the solid matter adhered to the conveyor chains 51a to 51d. Although but brought onto the top plate 22, the scraper 90a slides the bottom surface of the first zone 22a of the top plate 22, the first zone 1a of the tank 1 the solid via rear arcuate portion 24 The scraper 90b slides on the bottom surface of the second region 22b while flowing down to the rear portion, and the solid matter brought into the second region 22b is dropped from the drop port 87 to the inclined chute 88, and further, the inclined chute 88 The solid matter is allowed to flow down from the tip to the rear part of the first region 1a of the water tank 1. In this way, all the solids brought into the top plate 22 by the conveyor chains 51a to 51d are made to flow down to the rear part of the first region 1a of the water tank 1. Therefore, the possibility of inconvenience such as clogging due to the solid matter returning directly to the drainage gate 61 without falling near the drainage gate 61 is eliminated, and the solid matter is once again the first. It sinks during the passage from the region 1a to the second region 1b. Therefore, the solid matter is surely settled in the water tank 1 without hindering the sedimentation of the solid matter, and the desired solid-liquid separation performance is maintained.

Further, by providing the partition plate 10 in the water tank 1 so that the concrete slurry is charged into the first region 1a from the concrete mixer wheel 80 or the like, the concrete slurry in the water tank 1 when the concrete slurry is charged is obtained. The flow of the concrete slurry is stopped by the partition plate 10, and the entire water tank 1 including the second region 1b is not agitated when the concrete slurry is charged, and the concrete slurry makes a U-turn from the first region 1a to the partition plate 10. Then, it flows into the second region 1b and reaches the drain gate 61, so that the concrete slurry stays in the water tank 1 for a long time, during which more solid matter 71 settles on the bottom surface 5 and is above the drain gate 61. Clear water can be discharged smoothly.
In this embodiment, a drainage gate formed by stacking pipes 60a to 60g is provided, but the drainage gate provided in the second region 1b does not necessarily have such a structure, but a conventional filtration device, dehydration device, etc. May be provided.
Further, in this embodiment, an example in which the water tank 1 is partitioned by a partition plate 10 is shown, but even in a device in which the water tank is not partitioned in this way, the tip edge of the conveyor chain that scrapes up solid matter faces inward. By providing a scraper so as to be, it is possible to prevent solid matter from accumulating on the top plate.

1 Water tank 1a Water tank 1st area 1b Water tank 2nd area 6 Inclined surface 10 Partition plate 11 Water flow part 22 Top plate 22a Top plate 1st area 22b Top plate 2nd area 23a to 23d Guide rails 36a to 36d Sprocket 39 Drive mechanism 51a to 51d Conveyor chain 52a, 52b Rake 52a', 52b'Rake tip edge 61 Drain gate 71 Solid material 80 Concrete mixer truck 87 Drop port 88 Inclined chute 90a, 90b Scraper 90a', 90b'Scraper tip edge

Claims (1)

A bottom surface portion of a rectangular water tank in a plan view is formed substantially horizontally, an inclined surface portion extending diagonally upward from the bottom surface portion is formed on the front edge of the water tank, and the upper end portion of the inclined surface portion is rotationally driven by a drive mechanism. A sprocket is provided, and a partition plate is provided upright in the center of the width direction of the water tank so as to be parallel to the longitudinal direction of the water tank, and the water tank is divided into a first region and a second region. By partitioning the upper space with the partition plate, the concrete slurry discharged from the concrete mixer truck hits the partition plate and is put into the first region of the water tank, and the front edge of the partition plate and the inclined surface portion thereof. The first region and the second region are communicated with each other through the water passage portion as a gap between the two regions, a drain gate is provided in the second region, and the concrete slurry charged into the first region is used for the water passage. The portion is U-turned so that it flows to the second region so that the moisture in the concrete slurry is discharged from the drain gate, and a gutter-shaped top plate is supported on the upper portion of the partition plate to form an endless shape. A plurality of rakes are attached to the concrete conveyor chain at appropriate intervals so that the tip edge faces the outer circumference, and a plurality of scrapers are attached to the conveyor chain at appropriate intervals so that the tip edge faces the inner circumference. The conveyor chain is wound around the sprocket so as to make a circular rotation on the top plate as an outward path from the bottom surface portion to the inclined surface portion of the water tank, and the solid matter settled on the inner bottom portion of the water tank is raked. The solid matter on the top plate was moved backward by the scraper, and the solid matter was dropped to a portion of the water tank away from the water passage portion in the first region. A concrete slurry processing device characterized by this.

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