SU1780556A3 - Two-cylinder solution pump - Google Patents

Description

The invention relates to the mining industry and can be used for fixing mine workings by means of spray concrete and mortar.

Known two-cylinder mortar pump. comprising a housing, a drive motor kinematically coupled to the drive shaft, having two eccentrics mounted to interact with piston rods located in the cylinders to form piston and rod cavities. moreover, the pump is equipped with means for forcing the pistons at the suction stroke.

A disadvantage of the known mortar pump is the low reliability and fragility of work in underground conditions due to the difficulty of returning the mortar-supplying pistons to their original position after the end of the pumping stroke due to the rapid wear of the contact surfaces.

The aim of the invention is to increase the reliability and durability of the mortar pumps.

This is achieved by those. that each cylinder is made stepwise and is equipped with an additional piston fixed on the rod and installed in a stage of a larger cylinder diameter with the formation in combination with the rod cavity of the cylinder of a smaller diameter of the washing chamber filled with washing liquid under excessive pressure, and the washing chambers of both cylinders are interconnected to form funds at 1780556 AZ

1780556 4 <forcing pistons on the suction stroke, while a roller is installed in the interaction zone between the eccentric and the stem. The mortar pump is equipped with a pressure adjuster in the flushing chambers, made in the form of a spring-loaded displacing element installed with the possibility of influencing the flushing

LIQUID. . ··

In FIG. 1 shows a mortar pump. view from above; in FIG. 2 is the same side view.

The mortar pump includes a drive motor 1, which transmits torque through the coupling 2 to the drive shaft 3, on which eccentrics 4 are mounted, interacting via rollers 5 with the drive piston 6, and through the stem 7 - with the solution-supply piston 8, the washing chamber E in the form of two communicating cylinders 10 with a diameter larger than the diameter of the solvent-supplying cylinders equipped in their upper part with a pressure adjuster 11 made in the form of a piston 12 and a displacing element 13, each section (cavity) of the communicating cylinders 10 'is limited to one on the other hand, with a driving piston 6. and on the other, with a solution-feeding piston 8, a guide 14, a tank 15 for loading the mixture and a pressure line 16, 30 are installed under each of the rollers 5. The device has a working chamber 17 with suction valves 18 and pressure head 19, to limit rotation rod 7 coaxially with rollers 5 mounted rollers 20. which. move along the guides 14.. . ,. 35

Mortar pump works as follows.

When the engine 1 rotates, torque is transmitted through the coupling 2 to the drive shaft 3, on which the eccentrics 4 are mounted. They push the drive piston 6 through the rollers 5, and through the rod 7 the “creation piston 8.” under the action of the drive piston 6, it enters the adjacent cylinder 45 of the washing chamber 9. Due to the pressure G arising from the difference in the diameters of the solvent-supplying 8 and the driving 6 pistons, a force arises which returns the second solvent-supplying piston to its original position, while done like that t suction of the mixture into the mortar cylinder. When creating a vacuum in the working chamber 17, the suction valve 18 rises and the mixture from the tank 15 enters the working chamber 17.

/ When creating a pressure with a solvent-supply piston 7 in the working chamber 17, the suction valve 18 blocks the access 10 of the mixture from the tank 15, and the pressure valve 19 rises and the mixture enters the pressure pipe 16.

Since the pressure adjuster 11 in the washing chamber provides a certain pre-pressure, the rollers 5 are always pressed against the eccentrics 4.

Claims (2)

Claim . 1. Two-cylinder mortar pump. comprising a housing, a drive motor, Ki2Q nematic associated with the drive shaft having two eccentrics, set- _; with the possibility of interaction with piston rods located in the cylinders with the formation of piston and rod cavities, moreover, the pump is equipped with means for forcing pistons to be driven at the suction stroke, so that in order to increase reliability and durability, each cylinder is made stepwise and equipped with an additional piston; mounted on a rod and installed in a stage of a larger cylinder diameter with the formation, together with the rod cavity of the cylinder, of a smaller diameter of the washing chamber filled with the washing liquid under excessive pressure, the washing chambers of both cylinders communicating with each other 'to form means for 40 forced pistons to be guided on the suction stroke, and in the zone of interaction between the eccentric and the rod, a roller is installed. 2. The mortar pump according to claim 1, wherein it is equipped with a pressure adjuster in the washing chambers, is made in the form of a spring-loaded displacing element installed with the possibility of influencing the washing liquid. ·; .. 1780556 1 ΖΞ ~~ fi g. 2