SU848744A1 - Concrete pump - Google Patents

Description

one

The invention relates to pumping, in particular to pumps for pumping concrete mix.

A concrete pump containing a cylinder block mounted for swinging is known, which includes two working cylinders, the ends of which are facing the front wall of the receiving bunker, and this wall itself has the shape of an arc of a circle described from the center of the span, the front wall has a central hole, constantly communicated with the butt end of the injection pipeline, fixed in the opposite - back wall of the flute-type bunker, and two torzos of the workers of the cylinder located symmetrically to the central zone of the trajectory of movement , Lateral openings for the variable on the suction stroke, the message receiving hopper cavity with one of the working cylinders

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In the famous concrete pump front.

the wall of the receiving hopper is fixed in the cylinder block and, in the process of swinging the latter, moves with it, which leads to large friction losses between the wall and the concrete, which is located in the receiving bunker due to the relatively large size of the friction surface.

Due to this circumstance, the pump has a low mechanical efficiency, which requires additional power consumption for rocking the cylinder block.

The aim of the invention is to reduce the energy consumption for pumping a cylinder block ...

ten

This goal is achieved by the fact that the front wall is stationary relative to the receiving hopper and hermetically connected to the end of the discharge pipeline, and the cylinder block is equipped with pivotally mounted and pressed to the front wall of the bunker with the interference of the force-controlled springs with two valves for alternately blocking the side openings of the front wall bunke20 ra.

The drawing shows a diagram of the proposed concrete pump.

The concrete pump contains a cylinder 1 mounted with the possibility of swinging a cylinder 1, including two phase 2 and 3 and two working 4 and 5 cylinders. The ends of the working cylinders 4 and 5, facing the front wall 6 of the receiving hopper 7, and the wall 6 itself have in plan

the shape of the arc of a circle described from the center 8 of the swing. The front wall has a central opening 9, which is permanently connected to the end of the injection pipe 10, which is fixed. in the opposite - rear wall 11 of the receiving bin 7, two centrally located in the area of the trajectory of the ends of the working cylinders 4 and 5 of the side openings 12 and 13 for alternating, during the suction stroke, communication of the cavity of the receiving bunker 7 with one of the working cylinders 4 and 5. The front wall b is fixed with respect to the receiving hopper 7 and hermetically connected to the end of the discharge pipe 10. The cylinder block 1 is equipped with pivotally mounted on the fingers 14 and pressed against the front wall of the bunker 7. using soup reguliruem1h condition of two springs 15, dampers 16 and 17 for alternately overlapping side openings 12 and 13 of the front wall 6 of the hopper 7.

The force of the springs is corrected by means of threaded stops 18 installed in the brackets 19 fixed to the working cylinders 4 and 5. The starting of the cylinder block 1 relative to the receiving hopper 7 is provided by a hydraulic cylinder 20.

The concrete pump works in the following way.

In one of the extreme positions of the block 1 of the cylinders relative to the receiving hopper 7, the working cylinder 4 is installed opposite the opening 12 in the front wall 6 of the receiving hopper 7, and the working cylinder 5 opposite the central opening 9, the opening 13 in the wall 6 is blocked by a valve 17. The driving cylinders 2 and 3 report pistons in working cylinders

4 and Extending in opposite directions, with which the volume of the cylinder 4 increases and the volume of cylinder 5 decreases. In this position, in the cylinder 4, suction takes place, and the concrete mix from the cavity of the receiving bin 7 through the opening 12 in the front wall 6 enters the auxiliary cylinder 4. Simultaneously in the cylinder 5, an injection stroke takes place and the concrete mix from this cylinder through the central hole 9 in the middle wall 6 displaced into the discharge line

10. At the end of the cycles of the hydraulic cylinders 20, the block 1 of the cylinders is rotated to another extreme position relative to the receiving bin 7. V. This position is the working cylinder

5. Installs opposite the lateral opening 13 in the front wall of the b of the attachable bunker 7, and the working cylinder

4 - opposite the central hole 9, the hole 12 in the front wall

6, of the receiving hopper 7 is closed with a flap 16.

The drive cylinders 2 and 3 tell the pistons in the working cylinders 4 and 5 to move in opposite directions. , in which the volume of the cylinder 4 decreases, and the volume of the cylinder 5 increases. In this position in the working cylinder 4 a pumping stroke occurs, and the concrete mixture from this cylinder through the central hole

0 9 in the front wall 6 of the receiving hopper 7 is pushed into the discharge pipe 10. Simultaneously, suction stroke occurs in the working cylinder 5, and the concrete mix from the cavity of the receiving hopper 7 through the opening 13 in the front wall 6 enters the working cylinder 5. At the end of the cycles, hydrocylinder 20 cylinder block 1 is transferred to the original edge

0 position.

Further cycles are repeated. The present invention provides a reduction in the friction forces in the interface of the working cylinders with the receiving bin and thereby reduces the energy consumption for moving the cylinder block relative to the receiving bunker.

Claims (1)

1. US patent No. 3.663.129, cl. 417-316, publ. 1972. five ZQ sixteen