JP2003094423A - Washing apparatus for concrete hopper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing apparatus for a concrete hoper reduced in cost and saved in space by simplifying the structure of the washing apparatus. SOLUTION: A nozzle advancing and retreating port 17 for allowing a washing nozzle to advance and retreat is bored in the outer wall 18 of the concrete hopper 8 and an outer lid 19 for opening and closing the nozzle advancing and retreating port 17 is provided to the outside of the hopper 8, and the outer lid 19 and the piston rod 24 of a cylinder 23 are mutually coupled by a link to make the outer lid 19 freely openable and closable. The washing nozzle 13 is arranged to the outer lid 19 so as to be turned to the interior of the hopper 8 and an inner lid 26 for opening and closing the nozzle advancing and retreating port 17 connected to the outer lid 19 by a connection arm 27 is provided in the hopper 8. The operation for allowing the washing nozzle 13 to advance and retreat with respect to the interior of the hopper 8 and the closure changeover operation of the nozzle advancing and retreating port 17 by the outer lid 19 and the inner lid 26 are performed only by one cylinder 23.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for cleaning the inside of a concrete hopper mounted on a plant for producing ready-mixed concrete. 2. Description of the Related Art Conventionally, as an apparatus for cleaning the inside of a concrete hopper, there is an apparatus for jetting high-pressure water from a jet nozzle to wash off ready-mixed concrete adhering to a concrete hopper wall. In this cleaning device, a nozzle advancing / retreating port for advancing / retreating a cleaning nozzle is formed in an outer wall of a hopper, and a cleaning nozzle provided at a tip end of a piston rod of a cylinder can be moved in and out of the hopper from the nozzle advancing / retracting port by the expansion / contraction operation of the piston rod. It is what it was. Then, when high-pressure water is supplied to the cleaning nozzle that has entered the hopper, the cleaning water is jetted while rotating the nozzle portion so that every corner inside the hopper can be cleaned. On the other hand, a cover is provided at the nozzle advancing / retreating port so that ready-mixed concrete does not scatter around the hopper when the washing nozzle retreats, and this cover can be opened and closed by another cylinder. [0003] However, since the above-mentioned cleaning apparatus uses two cylinders for opening and closing the lid and for moving the cleaning nozzle forward and backward, the structure of the apparatus becomes complicated and the cost is increased. Has become. In addition, since a special long cylinder with a long stroke is used for the cylinder for moving the cleaning nozzle forward and backward, it is expensive, and in the case of failure, it cannot be obtained immediately like a general-purpose cylinder, so there is a problem in terms of maintenance. is there. Further, since the long cylinder has a structure that protrudes largely outside the hopper, there is a case where it is impossible to install a cleaning device in the hopper due to space. [0004] In view of the above, it is an object of the present invention to provide a concrete hopper cleaning apparatus which has a simple apparatus structure and which is reduced in cost and space. According to the present invention, in order to solve the above-mentioned problems, a concrete hopper cleaning apparatus according to claim 1 has a nozzle advancing / retreating port for advancing / retreating a cleaning nozzle on an outer wall of a concrete hopper. An outer lid for opening and closing the nozzle advance / retreat port is rotatably provided outside the hopper, and the outer lid and the tip of the piston rod of the cylinder are linked to make the outer lid freely openable and closable. In addition to disposing the cleaning nozzle toward the hopper, the hopper is provided with an inner lid for opening and closing the nozzle advance / retreat opening connected to the outer lid and the connection arm inside the hopper. on the other hand,
When the cleaning nozzle enters the hopper, the outer lid closes the nozzle advancing / retreating port. [0006] According to the concrete hopper cleaning apparatus of the present invention, when the ready-mixed concrete discharged from the mixer is stored in the concrete hopper, the cleaning nozzle retreats to the outside of the hopper together with the outer lid. At the same time, the nozzle advancing / retreating port is closed by an inner lid so that ready-mixed concrete does not adhere to the washing nozzle. On the other hand, when cleaning the hopper, the piston rod of the cylinder is adjusted to expand and contract, the outer lid connected to the link is rotated toward the inside of the hopper, the cleaning nozzle faces the inside of the hopper, and the nozzle advance / retreat port is replaced with the inner lid. And close with the outer lid. And
Wash water is sprayed from the washing nozzle to wash away the ready-mixed concrete adhering to the inner wall. At this time, since the nozzle advancing / retreating port is closed by the outer lid, there is no possibility that the washing water is jetted out of the hopper. Then, when storing the ready-mixed concrete again, the piston rod of the cylinder is adjusted again to expand and contract, the outer lid is rotated outward, the cleaning nozzle is retracted outside the hopper, and the nozzle advance / retreat port is closed. Close at As described above, the operation of moving the cleaning nozzle into and out of the hopper and the operation of switching the closing and closing of the nozzle advance / retreat port by the outer lid and the inner lid can be performed with only one cylinder. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a part of a ready-mixed concrete production plant. 1 is a biaxial concrete mixer for kneading various concrete materials to produce ready-mixed concrete. Parallel kneading axes 3, 3 '
And rotatably supported in opposite directions. A large number of arms 4 are radially arranged on the kneading shafts 3 and 3 'in the radial direction, and a blade 5 having an appropriate angle is attached to a tip end of the arms 4, and a predetermined angle is provided by a driving motor (not shown). Rotating at speed. 6 is a discharge gate for discharging the ready-mixed concrete in the mixer from the lower part of the kneading tank 2,
The cylinder 7 is opened and closed by expansion and contraction of a piston rod. Reference numeral 8 denotes a concrete hopper for temporarily storing ready-mixed concrete kneaded by the biaxial mixer 1;
A gate device 9 is provided below the concrete hopper 8 to discharge the temporarily stored ready-mixed concrete by a predetermined amount and load it into a mixer truck or the like. The gate device 9 opens and closes the flexible rubber gate 10 by pressing and separating a roller 12 attached to a piston rod of a cylinder 11. Reference numeral 13 denotes a cleaning nozzle for jetting cleaning water toward the ready-mixed concrete adhering to the inner wall of the hopper 8 to separate the nozzle body 15 by the pressure of the cleaning water supplied from the cleaning water supply pipe 14. A nozzle that rotates and rotates the nozzle head 16 in a direction orthogonal to the nozzle body 15 is adopted, and the cleaning water is sprayed in all directions without separately requiring a driving force to clean the inside of the hopper 8 to every corner. Have to be able to. Reference numeral 17 denotes a nozzle advancing / retreating port for advancing / retreating the cleaning nozzle 13 formed in the outer wall 18 of the hopper 8, and has a size such that the cleaning nozzle 13 can sufficiently pass therethrough. 19
Reference numeral denotes an outer lid for opening and closing the nozzle advancing / retreating port 17, and a support piece 20 of the outer lid 19 is attached to a shaft 22 supported by a bearing 21. The cylinder 23 is located near the outer lid 19.
Are disposed in a substantially vertical direction, and the distal end of the piston rod 24 and the shaft body 22 are linked by a link member 25.
The outer lid 19 is opened and closed according to the expansion and contraction of the piston rod 24. Thus, the cylinder 23 and the outer lid 19
Is linked by the link member 25, so that a cylinder with a short stroke can be used, and it is also possible to arrange the cylinder in a substantially vertical direction. It is also possible to significantly save space as compared with the above. A cleaning nozzle 13 is disposed on the hopper side of the outer lid 19, and as shown in FIG. 2, the cleaning nozzle 13 faces the inside of the hopper 8 when the outer lid 19 is closed.
When the outer lid 19 is opened, the cleaning nozzle 13 is retracted outside the hopper 8. Reference numeral 26 denotes an inner lid which opens and closes the nozzle advance / retreat port 17 in the same manner as the outer lid 19, and is disposed in the hopper 8 in a direction substantially orthogonal to the outer lid 19. The connection is made by a connection arm 27 through which the mouth 17 is inserted. Therefore, in conjunction with the opening / closing operation of the nozzle advance / retreat 17 by the outer lid 19, the nozzle advance / retreat 1 by the inner lid 26 is performed.
7 is performed. In this embodiment, the inner lid 26 is arranged in a direction substantially perpendicular to the outer lid 19, but it is not necessary to limit the angle to this angle. Further, the periphery of the cylinder 23 and the outer lid 19 is surrounded by a frame 28, and a cover for the frame 28 is appropriately provided to ensure the safety of an operator with respect to the cylinder 23 and the outer lid 19 being driven. I'm trying. According to the concrete hopper cleaning apparatus of the present invention, when the ready-mixed concrete produced by the mixer 1 is paid out to the hopper 8 and stored, as shown by a two-dot chain line in FIG. The nozzle 13 is retracted to the outside of the hopper 8, while the nozzle advance / retreat port 17 is closed by the inner lid 26 to prevent scattering of dust and the like to the outside of the hopper 8. Next, at the time of cleaning the hopper 8, as shown by the solid line in FIG. 2, the nozzle advancing / retreating port 17 is closed by the outer lid 19, and the cleaning nozzle 13 is exposed to the inside of the hopper 8. At this time, the inner lid 26 is opened and has escaped into the hopper 8. Then, the cleaning nozzle 13 is supplied through the cleaning water supply pipe 14.
More washing water is sprayed to wash off the ready-mixed concrete adhering to the inner wall of the hopper 8. At this time, the nozzle advancing / retreating port 17 is closed by the outer lid 19, and there is no possibility that the washing water will blow out of the hopper 8. When the ready-mixed concrete is to be produced again, the washing nozzle 13 is retracted to the outside of the hopper 8 again, and the nozzle advance / retreat port 17 is closed by the inner lid 26 to prepare for the preparation of the ready-mixed concrete. In this embodiment, the outer lid 19 for opening and closing the nozzle advancing / retreating port 17 and the inner lid 26 are separately provided. However, the outer lid 19 and the inner lid 26 are integrated, for example, having a substantially L-shaped cross section. The cleaning nozzle 1 is provided on one surface of the plate.
3, the nozzle advance / retreat port 17 may be opened and closed by rotating about the bent portion. As described above, according to the concrete hopper cleaning apparatus according to the first aspect of the present invention, a nozzle advance / retreat port for advancing / retreating the cleaning nozzle is formed in the outer wall of the concrete hopper, and the nozzle is provided outside the hopper. An outer lid for opening and closing the nozzle advancing / retracting opening and closing is rotatably provided, and the outer lid and the end of the piston rod of the cylinder are linked so that the outer lid can be freely opened and closed. The inside of the hopper is provided with an inner lid for opening and closing the nozzle advance / retreat port connected to the outer lid and the connection arm, and when the cleaning nozzle retreats outside the hopper, the nozzle advance / retreat port is closed by the inner lid. At the time of entry, the nozzle advance / retreat port is configured to be closed by the outer lid. The replacement operation can be performed, and the structure of the cleaning device can be simplified and the cost can be reduced. In addition, a general-purpose cylinder having a short stroke can be adopted, so that the cylinder is inexpensive, and can be easily obtained even in the case of a failure to facilitate maintenance. Further, the cleaning device can be easily compactly installed on an existing hopper.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway front view showing a part of a ready-mixed concrete production plant employing a concrete hopper cleaning device according to the present invention. FIG. 2 is an enlarged view of a main part of FIG. FIG. 3 is a side view of FIG. 2; [Description of Signs] 1 ... Concrete mixer 8 ... Concrete hopper 13 ... Cleaning nozzle 17 ... Nozzle advance / retreat 18 ... Outer wall 19 ... Outer cover 23 ... Cylinder 24 ... Piston rod 25 ... Link material 26 ... Inner cover 27 ... Connection arm

Claims (1)

Claims: 1. A concrete hopper has an outer wall for opening and closing a nozzle for opening and closing a nozzle, and an outer lid for opening and closing the nozzle for opening and closing the nozzle is rotatably provided outside the hopper. The outer lid is freely openable and closable by linking the end of the cylinder and the piston rod end of the cylinder, and the outer lid is provided with a cleaning nozzle facing the inside of the hopper. It is provided with an inner lid for opening and closing the mouth, and when the cleaning nozzle retreats outside the hopper, the nozzle lid is closed by the inner lid, and when the cleaning nozzle enters the hopper, the nozzle lid is closed by the outer lid. Characteristic concrete hopper cleaning equipment.