SU123509A1 - Pneumohydraulic landing strut for fixing clearing workings - Google Patents

Description

Hydraulic landing posts are known for fastening mining workings in which the sliding and hardening of the stand are achieved; thrusting is done either by using a hand pump built into the stand, or by using compressed air or working liquid supplied from the outside. However, these methods of extending and spreading racks have serious drawbacks, the main of which are: RACK construction DIFFICULTY; the need for a pipeline along the entire length of the lava; danger of introducing dust and dirt into the cavity of the stand along with compressed air.

The described hydraulic rack does not have these disadvantages and is characterized in that the mechanized separation and the initial strut of the RACK are carried out by accumulating the energy of rock pressure in it, and in the absence of a load, it quickly descends to its original position.

The drawing shows the following rack positions; / - initial; // - after separation; /// - during its descent during operation; IV - after unloading.

The stand consists of the following main components and parts: cylinder /, sliding part (current) 2, reverse 3, core 4 and safety - unloading valve 5.

Compressed air that is inside the retractable part of the rack exerts pressure on the working fluid in the same position (position /). The pressurized fluid passes through channels 6 in the return piston 3 and, filling the space between the return piston and the lower part of the core, passes through channel 7 into the cavity S, where the safety-unloading valve 5 is located. The mechanical seal 9 of the valve is tight adjacent to the JO end of the core, is an obstacle to LIQUID. I will act through the system of an eccentric-lever lever // - 12-13-14 on the valve 5, operating, overcoming the resistance of the spring 15, REMOVES the valve with the mechanical seal.chg, releasing

.KB 123509

fluid passage into the cavity 16 and from there through / 7 under the piston of the sliding part, causes the last lift: up. The elevation of the withdrawable part M is limited either by the roof or by the buksoy 18. After the rack is deployed, the lever / y. is put in the original position, the valve 5 with the mechanical seal is lowered down and, thanks to the spring 15, the core pincer is pressed tightly. When the roof pressure on the rack reaches a predetermined value, the extendable part of the rack is lowered. At the same time, the fluid from under the piston of the RELIEF part, having free access to the cavity 16 and the valve opening 19, exerts pressure on the cock 20 and the spring 21. The spring 21 moves out with the ball if the fluid pressure reaches a certain value. With the sliding part gradually lowering while the rack is running, a certain amount of liquid from the cylinder / (floor: e1P-e //) passes through valve 5 and gets under the return piston 3, along ;; warmly pododi.ma its core m 4, and forms under the reverse norppie, a cavity of 22 rarefaction spaces. The return piston rises up to the point where the sealing rubber ring 23 does not come off the cylindrical part of the core and does not open the path of the liquid through the condenser 24. At lowering the retractable part, the passage through the pre-emergency condenser increases, avalipie in cavity 25 and is discharged into the stem stock through valve 24. During remote unloading, lever 11 is turned to some fix; dummy: pull the valve 5 out to the left by means of 9 (position ///). The fluid from the region with the pressure and the pressure (cylinder /) through the channels (7 and 7) rushes to the area with the lowest pressure (rarefied R () (ratios 22 oi) (reverse spine)). Liquid pressure in the cylinder / drops sharply. Further, due to the difference in pressure in the cylinder and iodine by the inverse piston, part of the liquid from the cylinder zooms 1 to 22 and the sliding part descends by a certain amount (but addition / 1). Depends on the volume of liquids in iolost 22.

In order to extend and spread) and on the beginning of the first cycle of the csgo cycle, the lever 11 must be turned to such a maximum angle (|} iksirovani ugo.ch, so that the horizontal ring 26 on the valve is higher than the qi; opening the passage under the piston of the sliding part for the liquid, which is located in it; 1stts 25. Return / ltppimN), KOTOjnjfl is no longer held by the liquid column in position 25, under the influence of the liquid on which the compressed pressure is pressed, lowers down, and the liquid, which occupied rapeseed. 22, flows under the piston; parts through channels 7 and 17. When the Kzinovoy ui.: | opt k) and its KO.ibHo 27 back piston is below the 1Idrit1: ko | parts of se;) detshnaya 4, for liquid, n1, above oborpnlm nornsham, (1tkroets passage through channels 6, 7 and / 7. After sliding and ra: it is time to stand the lever 11 is placed in the first pack. cToiiKa is ready to go.

P) e d jM et and z about b) with i s n n

B Pneumohydraulic planting 1a pillar dt crei. pressure exerting pressure for lifting the extractor part of the rack, with separation and expansion occurring in the result of control of the rack with the lever and the piston.

2. The rack according to claim 1, dt and nj; and with the fact that during the time the roof is kept upright in the roof (the moving part forms a rarefied space, which, when unloading the stanchion, communicates with the high pressure cylinder, thus lowering the sliding part.