SU661140A1

SU661140A1 - Concrete pump

Info

Publication number: SU661140A1
Application number: SU772491117A
Authority: SU
Inventors: Александр Семенович Еремин; Александр Михайлович Хазан; Валерий Борисович Медведовский
Original assignee: Всесоюзный Строительный Трест По Механизации Работ "Энергомеханизация"
Priority date: 1977-05-30
Filing date: 1977-05-30
Publication date: 1979-05-05

Description

1one

Изобретение относитс к насосостроению, в частности к насосам дл перекачивани в зких и неоднородных жидкостей.The invention relates to pump engineering, in particular to pumps for pumping viscous and non-uniform liquids.

Известен бетононасос, содержащий размещенный в цилиндре с образованием поршневой и штоковой полостей поршень, снабженный уплотнительным элементом и имеющий в зоне сопр жени со щтоком камеру переменного объема, периодически сообщаемую со штоковой полостью, заполненной промывочной жидкостью 1.A concrete pump is known that contains a piston placed in a cylinder with the formation of piston and rod cavities, equipped with a sealing element and having a variable volume chamber in the interface zone with the rod, periodically communicated with the rod cavity filled with flushing liquid 1.

Недостатком известного насоса вл етс мала долговечность его цилиндро-поршневой группы, что обусловлено наличием абразива в перекачиваемой среде. Наличие абразива приводит к интенсивному износу уплотнительного элемента, внутренней поверхности цилиндра и самого порщн .A disadvantage of the known pump is the low durability of its cylinder-piston group, which is caused by the presence of abrasive in the pumped medium. The presence of abrasive leads to intensive wear of the sealing element, the inner surface of the cylinder and the piston itself.

Целью изобретени вл етс повыщение долговечности цилиндро-порщневой группы, насоса.The aim of the invention is to increase the durability of the cylinder-cylinder group, the pump.

Эта цель достигаетс тем, что шток дополнительно снабжен всасывающим клапаном , осевым и радиальными каналами, дл сообщени камеры переменного объема на такте всасывани со щтоковой полостью цилиндра , а поршень, на участке перед уплотнительным элементом со стороны поршневой полости, дополнительно снабжен радиальными каналами с установленными в них дроссел ми и св занны.м с указанными каналами нагнетательным клапано.м дл сообщени камеры переменного объема и; такте нагнетани с зоной сопр жени поршень-цилиндр. На фиг. 1 изображен бетононасос, продольный разрез; на фиг. 2 - сечение по цилиндро-поршневой группе насоса.This goal is achieved by the fact that the rod is additionally equipped with a suction valve, axial and radial channels, to communicate the chamber of variable volume during the suction stroke with the piston cavity of the cylinder, and the piston, in the area ahead of the sealing element from the side of the piston cavity, is additionally equipped with radial channels they are throttles and are connected to the indicated channels of the injection valve. m for communicating the chamber of variable volume and; an injection stroke with a piston-cylinder interface. FIG. 1 shows a concrete pump, a longitudinal section; in fig. 2 - section along the cylinder-piston group of the pump.

Бетононасос содержит размещенный вConcrete pump contains located in

Claims

cylinder 1 with the formation of a piston 2 and a slot 3 cavity piston 4, equipped with a sealing element 5 and having in the interface zone with HJTOKOM 6 an alternating volume chamber 7. The rod 6 is equipped with a suction channel 8, axial 9 and radial 10 and 11 channels for communication chambers of variable volume 7 at the suction stroke with a pinhole 3 of cylinder 1 filled with flushing fluid. The piston 4 in the area in front of the sealing element 5 on the side of the piston cavity 2 is provided with radial channels 12 and 13 with throttles 14 installed in them. A variable volume chamber 7 communicates with channels 12 and 13: pressure valve 15, which ensures the communication of chamber 7 in tact pumping with interface, piston 4 - cylinder 1. Concrete pump also contains receiving hopper 16, distribution unit 17, driving hydraulic cylinder 18 and tank 19 with flushing fluid in fluid communication with rod end 3 of cylinder 1, discharge pipe 20. Be The toner pump works as follows. The suction and discharge of the pumped medium occurs during reciprocating movement of the piston 4 in the cylinder 1, using a hydraulic cylinder 18 acting through the rod 6 on the piston 4. During the suction stroke, the distribution unit 17 communicates the piston cavity 2 with the receiving hopper 16, and during the stroke The injection port communicates this cavity 2 with the discharge pipe 20. Reducing the wear of the cylinder-norsh group when the pump is running is provided as follows. During the suction stroke, the volume of the chamber 7 increases and last through the channels 10, 11 and 9 and the suction valve 8 communicates with the bristle cavity 2, with the result that the flushing fluid in this cavity fills the chamber 7. During the pumping stroke, the flushing fluid from chambers 7 through the discharge valve 15 and channels 12 and 13 are displaced into the interface zone by piston 4 - cylinder 1, while removing abrasive particles from the walls of cylinder 1, which ensures 4HFUieT contact of the sealing element 5 with the cleaned wall of cylinder 1. Amount of liquid expelled Chambers 7 are controlled by drokes. 14. Invention of a concrete pump comprising a piston located in a cylinder to form a piston and rod cavity, equipped with a sealing element and having a variable volume chamber in the interface with the rod, periodically communicated with a brush cavity filled with flushing liquid, The fact that, in order to increase the durability of the cylinder-piston group, the rod is additionally equipped with a suction valve, axial and radial channels, to communicate the chamber volume on the intake stroke with the rod end of the cylinder, and the piston in the area in front of the sealing element on the side of the piston cavity, is additionally equipped with radial channels with throttles installed in them and an injection valve connected to the indicated channels to communicate the variable volume chamber during the injection stroke with the zone piston-cylinder coupling. Sources of information taken into account in the examination 1. Japan, Application No. 47-46683, cl. 63 (3) 81, 1972.

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