JPS60240890A - Concrete force feed pump - Google Patents

Abstract

PURPOSE:To improve the pressure feed efficiency by pressure feeding the concrete while confining in a closed space to be formed with the outer circumference of rotor, a plurality of partitioning pieces fixed to said outercircumference and the innercircumferential face of casing as the rotor rotates. CONSTITUTION:Concrete is fed through an inlet path 10 and pressure fed to the outlet path 11 as the rotor 3 rotates. Here, the concrete is pressure fed while being confined in a closed space formed with the outercircumference of rotor 3, a plurality of partitioning pieces 4 fixed to said outercircumference and the inner face of casing 1 applied with lining 2. Constant hydraulic pressure is applied continuously from an accumulator 9 into a flexible film 8 fixed to a partition wall 7 to contact said film 8 continuously against the outercircumferential face of rotor 3 and the innercircumferential face of casing 1 thus to prevent counterflow of concrete from the outlet side to the inlet side. Consequently, concrete can be pressure fed efficiently.

Description

[Detailed description of the invention] (Industrial application field) Concrete 1. This relates to a pressure-feeding bonog.

(Prior Art) Conventionally, a dual hydraulically driven piston system has been frequently used for pouring concrete at construction sites. However, in this method, by operating two pistons, when one is in the discharge stage, the other is in the suction stage, so on the concrete pumping side, the suction port on the concrete hopper side is closed, and the discharge port on the pumping pipe side is closed. It requires the outlet to be fully opened, and a pulping device is required to create the opposite situation on the concrete suction side.

(Problems to be solved by the invention) In order to force-feed a large amount of concrete in a short period of time, valves must be switched quickly and frequently, and the noise associated with the operation is high, since concrete is handled. Coarse aggregate and fine aggregate are mixed together, which causes severe wear around the gate valve, and there is also a relatively large amount of concrete remaining inside the valve device at the end of pouring, which requires expense to dispose of. It's pointing to the problem.

As a solution to this problem, a part of the pressure-feeding pipe is made flexible, the membrane part is pressurized with a roller, the pipe is flattened, and the flattened part is successively moved forward to force-feed the concrete. This method is also in practical use, but even if the flexible tube is flattened by applying force from the outside, it is impossible to achieve a complete seal. Due to the fact that the flexibility of the pipe makes it difficult to withstand high pressure, its application to concrete with a small slump value used at civil engineering construction sites is not always satisfactory.

The present invention solves the problems of the inclined piston method and proposes a new method that can achieve higher pressure than the method using a flexible tube.

(Means for Solving the Problems) The present invention comprises a casing having concrete inlet and outlet passages and a rotor rotating around the center of the casing, and a plurality of partition pieces arranged at equal intervals around the outer circumference of the rotor. The gap between the casing and the rotor is divided by the partition piece, and the concrete IJ-t is sealed in the gap and sent from the inlet side to the outlet side as the rotor rotates. It is characterized by providing a flexible membrane that is connected to the inside and applies a constant hydraulic pressure to the inside, thereby preventing concrete fed to the outlet side from flowing back to the inlet side.

(Operation) As the rotor rotates, concrete is fed, trapped between the partition piece, the casing, and the rotor, and sent to the exit passage as the rotor rotates. Then, after passing over the partition piece membrane, it connects with the passage and is sent out by the partition piece at the rear. Furthermore, since the membrane is connected to the accumulator, the membrane is always in contact with the outer peripheral surface of the rotor, so that the concrete on the outlet side does not flow back into the inlet passage.

(Example) Hereinafter, the apparatus according to the present invention will be described in detail based on an example.

FIG. 1 is a diagram showing the structure of the device according to the present invention, and FIG.
The figure shows a cross section taken along the line ■-■ in FIG. Figures 1 and 2
In the figure, 1 is a casing, 2 is a lining made of a polymeric material that is bonded to the inner surface of the casing 1 and serves as a wear-resistant seal, and 3 is a partition piece made of a polymeric material that is attached to the 4U rotor 3 and is wear-resistant. It has strong properties and sealing properties. 5 is a drive shaft that rotates the rotor 3; 6 is a key that connects the rotor 3 and the drive shaft 5; 7 is a partition that divides the concrete outlet and inlet sides; 8 is a polymeric material membrane; 9 is an accumulator; 10 11 indicates a concrete inlet passage, 11 a concrete outlet passage, and 12 a hydraulic piping.

In the figure, a passage 10 is connected to a concrete hopper (not shown), and as the rotor 3 rotates, concrete is fed to a casing having a plurality of partition pieces 4 and a lining 2 attached to the outer circumference of the rotor. The concrete is trapped between the rotor 1 and the rotor 3, and is sent to the exit side as the rotor 3 rotates.

Next, on the exit side, when the leading partition piece 4 of the part that confines the diagonal concrete gets over the membrane 8 made of polymer material, it is connected to the exit side passage 1], and the concrete is transferred to the pressure pipe by the rear partition piece. They will be sent out towards. A constant hydraulic pressure is always applied inside the membrane 8 attached to the partition wall 7 due to the action of an accumulator 90, and the membrane 8 is always in contact with the outer peripheral surface of the rotor and the inner peripheral surface of the casing, and the concrete on the outlet side is moved toward the inlet side. I try not to let it flow backwards. As the rotor 3 rotates, when the partition piece 4 reaches the slanted membrane part, the membrane 8 is bent at \ while maintaining a constant pressure by the partition piece 4, and the partition piece 4 passes toward the inlet side. Even when the partition piece 4 passes through, the partition piece 4 and the membrane 8 are in contact with each other at a constant pressure and are sliding, so there is no backflow of concrete.

On the other hand, when the partition piece 4 passes through the membrane 8, excess oil flows back to the accumulator 9 via the hydraulic piping 12 in order for the membrane 8 to be depressed and for the internal pressure to be kept constant. As the membrane 8 returns to its original shape as the partition piece 4 passes,
Oil is immediately supplied from the accumulator 9 via the hydraulic line 12, so that the membrane 8 always maintains a constant pressure.

(Effect of the invention) The explanations above are repeated continuously as the rotor 3 rotates, and the concrete is sent out to the pressure pipe.The pressure is the material that makes up the concrete, the mixture of water, etc., and the length of the pressure pipe. , pressure feeding position i, varies depending on the height of , etc.
In the device according to the present invention, between the partition pieces or on the entrance side.

Since it is operated with a complete seal between the outlet sides,
It is possible to generate pressure within the device that corresponds to the conditions of upward pressure feeding, making it possible to place the required concrete.

In addition, the device according to the present invention pumps concrete by rotary motion and does not require a valve mechanism, so noise can be greatly reduced and residual concrete can be minimized.

As explained in detail above, the device according to the present invention is a new device that can solve the problems of conventional concrete pressure pumps, has a simple structure, and can exhibit sufficient performance, and will greatly contribute to the industry. There is something.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an embodiment of the device according to the present invention, and FIG.
The figure is a sectional view taken along the line I--■ shown in FIG. Symbol explanation 1 casing, 2 lining, 30-ta, 4° partition piece, 5. Drive shaft, 6 keys, 7 partitions, 8 polymer membranes,
9. Accumulator, 10. Concrete entrance passage, 11
．． Concrete outlet passage, 12. hydraulic piping

Claims (1)

[Claims] It consists of a casing having a concrete inlet and outlet passage, and a rotor that rotates around the center of the casing, and a plurality of partition pieces are attached to the outer periphery of the rotor at equal intervals, and the gap between the casing and the rotor is divided by the partition pieces. The concrete is sealed in the gap and sent from the artificial side to the outlet side as the rotor rotates, and the partition wall of the inlet and outlet passages is connected to an accumulator to provide a flexible structure with a constant hydraulic pressure inside. A concrete pressure pump characterized by being provided with a membrane to prevent concrete fed to the outlet side from flowing back to the inlet side.