JPH07112696B2 - Concrete pouring equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a concrete placing device.

[Prior Art] Generally, in bridge construction, a pier for supporting the superstructure of the bridge is erected from the riverbed or the seabed, but such a pier is mainly made of concrete. At that time, a concrete placing ship equipped with a batcher plant is used.

7 to 9 are explanatory views of a concrete placing ship equipped with the batcher plant, 1 is a cement silo, 2 is a sand storage hopper, 3 is a gravel storage hopper, and the cement in the cement silo 1 is shown. Is supplied to the weighing tank 5 by the bucket elevator 4, and sand and gravel storage hoppers 2, 3
The sand and gravel inside are supplied to the measuring tanks 6 and 7 by the conveyors 8 and 9, respectively, and the cement, sand, gravel, and water automatically measured by the measuring tanks 5, 6 and 7 and the measuring tank (not shown) to the mixer 10. throw into. The cement, sand, gravel, and water put in the mixer 10 are kneaded, and then sent to the agitator 11 to continue stirring, and the gate 12 is opened if necessary, and the agitator 11 is opened.
The ready-mixed concrete inside drops into the concrete hopper 18, passes through a pipe (not shown) by the concrete pump 13, and is discharged from the hose 17 extending from the tip of the boom 16 on the tower 15 standing on the deck 14. ing.

Conventionally, as the agitator 11, a pug mill type as shown in FIGS. 5 and 6 has been used. That is,
A horizontal shaft 20 extending in the longitudinal direction is rotatably provided in the center of the casing 19 in the shape of a gutter, and the arm 21 is attached to the horizontal shaft 20.
A paddle 23 composed of a blade 22 fixed to the tip of the arm 21 at a required angle is arranged radially and at a required interval in the axial direction (longitudinal direction of the casing 19) to support the casing 19. The rotation of the motor 25 installed in the frame 24 is transmitted to the horizontal shaft 20 by the V belt 27 or the like via the speed reducer 26, and the paddles 23 cause the casing 19 to move.
The concrete inside is agitated, and the concrete is supplied to a concrete pump (not shown) by opening a gate (not shown) from an outlet 28 (three in the longitudinal direction of the casing 19 in the figure) provided at the bottom of the casing 19. It is supposed to do.

[Problems to be Solved by the Invention] However, in the concrete placing device having the above-described pug mill type agitator, the capacity of the casing 19 is increased to increase the concrete supply capacity in order to follow the recent increase in the size of bridges. If a need arises, the casing 19 must be extended in the direction of the horizontal axis 20 due to structural restrictions, and the discharge port 28 must be increased accordingly. It will be difficult.

In view of such a situation, the present invention is to provide a concrete placing device capable of increasing the capacity and improving the concrete supply capacity of the entire device without extending the casing of the agitator in only one direction.

[Means for Solving the Problems] The present invention provides a pan-type agitator having a casing in which a donut-shaped stirring chamber is formed below a concrete mixer, and the pan-type agitator has a casing in a lower circumferential direction. , A plurality of discharge ports are arranged so as to be openable and closable, and each discharge port concrete pump is connected.

[Operation] Therefore, it is possible to increase the capacity of the entire device without extending the casing of the agitator in only one direction unlike the conventional concrete placing device having the pug mill type agitator, and it is possible to make the device compact. As a result, concrete pumps can be installed corresponding to the multiple outlets that can be opened and closed, and the concrete supply capacity will increase.

[Example] An example of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 are explanatory views of a pan type agitator 29 in a concrete pouring device as one embodiment of the present invention, in which a donut-shaped bottom plate 30 has an inner edge portion and an outer edge portion, respectively. The casing 31 and the outer casing 32 are attached to form a casing 34 in which a doughnut-shaped stirring chamber 33 is formed, and a motor 35 having a speed reduction mechanism is provided at the center of the casing 34 via a support bracket 37. And a rotating frame 38 is mounted on the output shaft 36 of the motor 35, and the outer peripheral surface of the outer peripheral cylindrical portion 39 of the rotating frame 38 has a required length and has a position above the stirring chamber 33. A plurality of horizontally extending support rods 40 are radially fixed to each of the support rods 40 at the tip end thereof, and an arm 41 of a desired shape extending to the stirring chamber 33 and a blade fixed to the tip end portion of the arm 41 at a predetermined angle. Install the paddle 43 consisting of 42 and.

Further, a plurality of (eight in total in the figure) semi-circular outlets 44 are provided at equal intervals on the outer peripheral portion of the bottom plate 30 of the casing 34, and the respective outlets 44 are opened and closed. Possible fan-shaped gate
45 are arranged. Each of the gates 45 is fitted to a shaft 46 rotatably supported in parallel with the generatrix of the outer cylinder 32, and the shaft 46
A rod 48 tip of a cylinder 47, which is arranged at a right angle to the shaft 46 and is pivotally attached to the outer surface of the outer cylinder 32, is connected via a link 49.
The shaft 45 is rotated about the shaft 46 to open and close the discharge port 44.

3 and 4 are layout diagrams of the concrete pump 51 with respect to the pan-type agitator 29 in the concrete placing device, in which the chute 52 is connected to each of the outlets 28, and the concrete pump 51 is connected to the pan. Type agitator
The concrete pumps 51 are arranged so as to be arranged at outer peripheral positions of 29, and a pipe 54 leading to a tip hose (not shown) is connected to each concrete pump 51. Incidentally, reference numeral 55 in the figure denotes a receiving chute for guiding concrete supplied from a mixer (not shown) provided outside the pan-type agitator 29 to the stirring chamber 33 of the pan-type agitator 29.

With the configuration as described above, the concrete that is kneaded and supplied from the mixer is poured into the stirring chamber 33 of the pan-type agitator 29 through the receiving chute 55, and the concrete poured into the stirring chamber 33 is the motor 35. Stirring is continued by the paddle 43 which is rotationally driven by so as not to solidify. Here, if necessary, extend the cylinder 47 to
By rotating the gate 45 around 46, the outlet 44
Open and shoot the concrete from the outlet 44 52
Is supplied to a concrete pump, is discharged from the tip hose through the pipe by the concrete pump 51, and is sequentially poured into the formwork for the pier.

In this way, by making the agitator a pan type, that is, the casing 34 having a cylindrical shape, even when it is desired to increase the capacity,
Unlike the conventional pug mill type agitator, the casing does not extend in only one direction, and by providing a plurality of outlets 44 on the outer peripheral portion of the bottom plate 30 of the casing 34, A plurality of corresponding concrete chutes 52 and concrete pumps 51 can be installed efficiently,
In addition to being able to improve the concrete supply capacity, the overall equipment will also be made compact, making it possible to handle large-scale bridge construction.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various changes can be made without departing from the scope of the present invention.

[Effects of the Invention] As described above, according to the present invention, a plurality of concrete pumps can be efficiently installed without extending the casing of the agitator in only one direction, and the capacity and concrete of the concrete placing device as a whole and the concrete can be increased. It is possible to increase the supply capacity while making it compact, it is less restricted by the installation location, it is advantageous in a limited space, and it is possible to exert an excellent effect that it can be applied for large-scale bridge construction. .

[Brief description of drawings]

1 to 4 are explanatory views showing an embodiment of the present invention. FIG. 1 is a plan view of a pan type agitator, and FIG.
Fig. II-II arrow equivalent view, Fig. 3 is an explanatory view of the concrete pump arrangement with respect to the pan type agitator, Fig. 4 is IV-IV arrow equivalent view of Fig. 3, and Figs. It is explanatory drawing which shows an example, FIG. 5 is a side view of a pug mill type agitator, FIG. 6 is a VI-VI arrow view of FIG. 5, and FIG. 7 is a side view of a batcher plant mounted on a concrete placing ship. Explanatory drawing, FIG. 8 is the VIII-VII arrow view of FIG. 7, and FIG.
It is a IX-IX arrow line view of a figure. 29 is a pan type agitator, 33 is a stirring chamber, 34 is a casing,
35 is a motor, 43 is a paddle, 44 is an outlet, and 45 is a gate.

Claims (1)

[Claims] 1. A pan-type agitator having a casing in which a donut-shaped stirring chamber is formed is installed below a concrete mixer, and a plurality of discharge ports are provided in the lower circumferential direction of the casing of the pan-type agitator. A concrete placing device, which is arranged so as to be openable and closable and a concrete pump is connected to each discharge port.