SU1693162A1 - Unit for soil compacting - Google Patents

Abstract

The invention relates to the construction, in particular, to devices for compacting soils for the construction of intra-quarter roads, sidewalks. The goal is to increase productivity and reliability. In the soil compaction installation, the tap-off unit is mounted on the mast by means of a spring pusher mounted with the possibility of reciprocating and moving in a vertical plane, the spring force of which exceeds the force of resistance FConp to the rope pulling. Fconp. 2Q / (14 +.) Х х at Qc pt) 2n / 4 Height: where Qc is the force of resistance of the working fluid in the piston cavity of the hydraulic cylinder to the rod pulling in; Dn is the outer diameter of the piston; Growth - residual pressure in the piston cavity of a hydraulic cylinder when the rod is retracted; a - the multiplicity of the polyspast; Efficiency of each block of the chain hoist, taking into account the losses in the block supports, as well as losses caused by the rigidity of the rope / Нц - mechanical efficiency of the hydraulic cylinder; / Mp is the efficiency of the movement mechanism of the diverter unit. The specified installation performance ensures an intensive and reliable operation of the device with a good compaction of the soil due to the possibility of automatic control of the actuator hydraulic cylinder at any level of the working body depth. 4 il. THX

Description

The invention relates to the construction, in particular, to devices for compacting soils for the construction of intra-quarter roads, sidewalks,

The goal is to increase productivity and reliability.

FIG. 1 shows a general view of the device; in fig. 2 is a view along arrow A in FIG. one; in fig. 3 shows a section BB in FIG. one; in fig. 4 is a diagram of the device's polyspast.

The installation contains a base machine, on the boom 1 of which the mast 3 is mounted with the help of the bracket 2. The mast 3 is pivotally connected with the bracket 2 and can be rotated around it with the help of the hydraulic cylinder 4, and in the lower part

It has a base 5. On the mast 3, there is a drive in the form of a hydraulic cylinder 6 of the working body 7. The hydraulic cylinder 6 is made with fixed blocks 8 and movable blocks 9 of the spontaneous system fixed on its stem, the lifting cable 10 of which is connected to the working body a tamping plate placed between the vertical mast guides 3. At the top of the mast, a switch 12 for supplying working fluid to the hydraulic cylinder 6 in contact with the movable stops 13 and 14, and a hydraulic distributor 15 are installed. The stop 13 is connected to the rod m hydraulic cylinder 6 via T-ob- different lever 16, and stop 14 - retractable with

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unit 11 using the lever 17. When this, the bypass unit 11 is mounted on the mast 3 by means of a spring pusher 18 with a spring 19.

In this case, the stroke of the pusher corresponds to the depth of the working body, and the force of its spring Fnp. FConp.

Rcqi „Qc

(1 + J / 6-f- 762 + ... 7/6) BW P "

 lo „2„

with Oc4 Growth,

where Fnp is the spring force;

Fconp - resistance to rope pulling;

Qc is the force of resistance of the working fluid in the piston cavity of the hydraulic cylinder to retraction of the rod;

Dn is the outer diameter of the piston;

Growth - residual pressure in the piston cavity of the hydraulic cylinder when the brush is retracted;

a - the multiplicity of the polyspast; d} 5 - the efficiency of each block of the chain hoist, taking into account the losses in the supports of the block, as well as the losses caused by the rigidity of the rope;

t / mc is the mechanical efficiency of the hydraulic cylinder;

t / mp is the efficiency of the mechanism for moving the diverter unit.

The installation works as follows.

When the hydraulic distributor 15 is turned on in the cab of the base machine, the working fluid enters the piston cavity of the hydraulic cylinder 6, the rod of which begins to extend and the working body 7 (tamping plate) by means of the polyspast system 8, 9,11 and the lifting rope 10 starts to rise up. The rod, having reached its extreme extended position, by means of the stop 13, (placed on the lever 16, interacts with the eyef switch 12. The valve 15 commands to drain the working fluid from the piston cavity, and the tamping plate 7 begins to fall down The lifting rope 10 causes the hydraulic cylinder 6 to retract. After the plate 7 hits the ground, its mass no longer acts on the lifting cable 10 and the spring plunger 18, pressing the bypass unit 11, brings the hydraulic cylinder rod 6 to the bottommost one. t-mentioned position. In this case the pusher 18 pushes up unit 11 and the abutment 14 disposed on the lever 17 presses the switch 12 and the control valve 15

gives a command to inject the working fluid into the piston cavity of the hydraulic cylinder 6, the rod of the hydraulic cylinder 6 begins to move forward, the tamping plate 7 goes up. Further

the cycle repeats.

Thus, the control of the hydraulic cylinder 6 is carried out automatically and irrespective of the level of penetration of the working member-tamping plate 7, since the unit

11 by means of a spring pusher 18 is pressed after the impact of the plate and makes the rod trimmed to the extreme retracted position and is triggered in this position of the switch 12. Achieved is complete

consistency between the movement of the rod of the hydraulic cylinder 6 and plate 7, i.e. the hoisting rope will no longer break, and consequently, the reliability of work will increase, its intensity.

Claims (1)

Invention Formula Installation for soil compaction, containing a base machine with a mast, mounted on it a hydraulic cylinder for driving the working body with blocks of a polyspast system, some of which are mounted on the rod, and the lifting rope is connected to the working body through a branch block mounted on the mast hydraulic cylinders are distinguished by the fact that, in order to increase productivity and reliability of operation, the diverter unit is mounted on the mast by means of a spring pusher mounted in the vertical direction of the reciprocating movement, the spring force Fnp exceeds the resistance force Fconp rope pull equal to Fconp 2QC 45 (1 + J / 6 +7/6 + ... 7/6 3) rjb PMs / mp with Qc JAOP ost W Qc is the force of resistance of the working fluid in the piston cavity of the hydraulic cylinder to retraction of the rod; Dn is the outer diameter of the piston; - Growth is the residual pressure in the piston cavity of the hydraulic cylinder when the rod is retracted; a - the multiplicity of the polyspast; if, - the efficiency of each block of the chain hoist, taking into account the losses in the supports of the block, as well as the losses caused by the rigidity of the rope; VMM - mechanical efficiency of the hydraulic cylinder; / mp is the efficiency of the movement mechanism of the tap-off unit, and one of the stops on the tap-off block ; / MA FIG. 2 Ae 4 from // S / / S ///