SU488770A1 - Piston pump feeder for hydrotransport solid materials - Google Patents

Description

one

Piston pump feeders for hydrotransport of solid materials are known, containing four cylinders combined in pairs into two blocks, each of which is equipped with a floating piston dividing the cylinder cavity into the working cavity connected through valves to the suction and discharge pipes, and the drive cavity connected with a source of drive fluid through a spool valve, serving two cylinders in one unit and controlled by a switching mechanism

The purpose of the invention is to simplify the switching mechanism.

For this, the piston rods in each cylinder block are parallel and pivotally connected to the two arms of the three-arm rotary arm, the third arm of which is connected by a pull and lever

with the valve spool valve of another cylinder block.

In addition, in this pump-feeder

directional spool valves can be made on-off.

The drawing shows the proposed piston pump feeder.

The pump contains four cylinders 1-4, combined noifapHO into two blocks 1-2 and 3-4. Each cylinder is equipped with a floating piston 5, which divides the cylinder’s maximum perception into the working (lower) cavity connected via valves 6 and 7 to the suction and discharge piping 8 and 9, and the driving (upper) cavity connected to the source of driving visibility, for example a pump 1O, through the two-position spool valve 11 or 12, with the valve 11 serving two cylinders 1 and 2 in one block, and valve 12 - cylinders 3 and 4 in the other block.

The rods 13 of the pistons 5 in each cylinder block are parallel and well connected to the two arms of the swivel arm 14, the third arm 15 of which is connected to the thrust 16 and the lever 17 to the spool valve 11 or 12 other cylinder blocks.

In the position shown in the drawing, the pistons 5 of the cylinders 3 and 4 are in extreme positions, the windows of the spool valve 12 are closed, the pistons 5 of the cylinders are in an intermediate position, and the windows of the spool valve 11 are open. The drive fluid from the pump 10 enters the drive cavity of the cylinder 2, the piston 5 of which moves downward and through the valve 7 displaces the hydraulic mixture into the pressure pipe 9. Simultaneously piston 5 cylinder

I (due to the connection of the rods 13 with the yoke 14), moving up, displaces the drive fluid into the drainage tank 18 through the valve 6 and sucks the hydraulic mixture

.of the suction line 8.

As the 5 cylinders 1 and 2 move along the shaft 5, the rocker 14 rotates and over the shoulder 15, the rail 16 and the lever 17 mixes the valve of the distributor 12 to the left, thanks to which the spool window

the separator 12 gradually opens, together with the drive cavities of the cylinder 3 with the pump 10, and the cylinder 4 - with the drain tank 18. The pistons 5 of the cylinders 3 and 4 begin to slowly mix with increasing speed as the windows of the spool valve 12 open. press and cylinder 4 - the suction of the slurry. After the windows of the spool distributor are fully opened - 12 pistons 5 of cylinder 3 and 4 move at normal operating speed. As the pistons 5 of cylinders 3 and 4 move, the associated beam 14 rotates and displaces the spool valve head.

II left, whereby the windows of the latter are gradually closed, causing the piston 5 of the cylinders 1 and 2 to slow down.

When pistons 5 of cylinders 1 and 2 approach their extreme positions of the spool valve 11, the valves completely overlap, and then due to further slide of the spool valve 11 to the left, the windows gradually open, switching cylinders 1 and 2 to the reverse mode of operation.

Further, the cycle is repeated by a similar effect of the switching mechanism of the block 1-2 on the slide valve 12.

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Claims (2)

1. Piston pump feeder for hydrotransport of solid materials containing combined in pairs in two blocks four cylinders each of which is equipped with a floating piston dividing the cylinder cavity into the working cavity connected via valves to the suction and discharge piping and the drive cavity connected to the source of driving fluid through a spool valve serving two cylinders in one block and controlled a switching mechanism, characterized in that in order to simplify the switching mechanism, the piston rods in each cylinder block are parallel and hingedly connected to the two arms in rotation a three-armed rocker, the third arm of which is associated draft type ii lever to the rod of the spool of the distributor of another cylinder. 2. Pump-feeder according to claim 1, of which is that the spool valves are two-way.