SU714018A1

SU714018A1 - Apparatus for testing safety valves of mine roof support hydraulic props

Info

Publication number: SU714018A1
Application number: SU742022398A
Authority: SU
Inventors: Павел Михайлович Шилов; Александр Андреевич Назаренко; Михаил Иванович Щербаков; Владимир Павлович Вишневский; Владимир Иванович Беляев; Валерий Иванович Евдошенко; Виктор Григорьевич Олейниченко
Original assignee: Днепропетровский Ордена Трудового Красного Знамени Горный Институт Им. Артема
Priority date: 1974-05-05
Filing date: 1974-05-05
Publication date: 1980-02-05

Description

-.1 .-.one .

Изобретение Ьтноситс к горному оборудованию и может быть использовано при проведении профилактических работ гидрофицированных,крепей.The invention relates to mining equipment and can be used in the maintenance of hydroficated roof supports.

Известно устройство дл испытани клапанов шахтйой гидравлической крепи , включающее насосную станцию , мультипликаторы, реле давлени , электрогидрораспределители, крайы управлени 1.A device is known for testing valves of mine hydraulic support, including a pumping station, multipliers, a pressure switch, electro-hydraulic distributors, control edges 1.

-Наиболее близким к изобретению по технической сущности и достигаемому результату вл етс устройство дл испытани предохранительных клапанов гидрОстрек механизированной крепи, включающее мультипликатор с полост ми высокого и низкого давлени|1 , командный золотник с камерами уп равлени , дроссели, обратные клапаны , испытательную камеру, манбметр , напорную и сливную магистрали 2 .- The closest to the invention in its technical essence and the achieved result is a device for testing safety valves hydro mechanized support, including a multiplier with high and low pressure cavities | 1, control spool with control chambers, throttles, check valves, test chamber, manbmeter , pressure and discharge lines 2.

Недостатком этих устройств йл етс наличие в них мультипликатора одностороннего действи и командного золотника, не обеспечивающих автоматического режима управлени устройством и посто нства давлени в испытатеЛьйой камере.The disadvantage of these devices is the presence of a one-way multiplier and a command spool in them, which do not provide automatic control of the device and the constant pressure in the test chamber.

Цель изобретени - повышение эффективности испытаний в шахтных ус .лови х за счет обеспечени автома- тического режима управлени мультипликатором .The purpose of the invention is to increase the efficiency of testing in mining installations by providing an automatic multiplier control mode.

Поставленна цель достигаетс тем, что мультипликатор нтполнен с двум камерами высокого и низкого давлени -и с цилиндрическими управл 0 ющими выточками, которые сообщены с камерами управлени командного золотника с возможностью попеременного соединени напорной и сливной магистралей .с полост ми .высокого и. This goal is achieved by the fact that the multiplier is filled with two high and low pressure chambers - and with cylindrical control bores, which communicate with the control spool control chambers with the possibility of alternately connecting high and low cavities.

5 низкого давлени мультипликатора, при этом одна из полостей высокого давлени соединена: с испытательной камерой.5 of a low pressure multiplier, wherein one of the high pressure cavities is connected to: a test chamber.

На чертеже представлена гидравли0 ческа схема устройства.The drawing shows a hydraulic diagram of the device.

Claims

The device for testing the safety valves of hydraulic racks of mechanized supports consists of a multiplier 1 of two-sided operation, a command spool 2c hydraulic control, check valves 3-5, a pressure gauge 6, a crane 7, throttles 8-10 of a safety valve 11 with a test chamber, a low-pressure right cavity 12 , check valve-13 / right cavity 14 high pressure middle groove 15 multiplier, its piston 16f left cavity high pressure 1.7, check valve 18, groove 19, groove 20, left half 21 low d aleni, grooves; 22, grooves 23, a pressure line 24 and a rainwater line 25.. The device works as follows. (In a manner. If the pressure in the test chamber of the safety valve 11 (in the hydraulic piston cavity) is less than the nominal pressure of the pump unit, then the fluid from the pressure pipe 24 flows through the non-return valve 5 into the test chamber of the safety valve 1 to further increase the pressure at the position of the command spool 2 indicated in the drawing, the liquid is supplied to the right cavity, the low pressure of the multiplier 1 and through the return {slant 13 fill the right cavity 14 is high About pressure. A 5-fold from a pressure line 24 is supplied to the middle groove of the 15th corporation and a multiplier, under the action of the pressure of the liquid of the pressure line 24 of the piston .. 1 b of the glider type is shifted to the left, the liquid is expelled; 3 s ispatiatelnyk) valve chamber II The check valve 18 is closed. The movement of the piston of the multiplier continues until the notch 19 nepekpioeT of the groove. At the same time, the fluid is supplied to the left-hand low-pressure cavity 21 of the multinJ | HKaTOpa, and the piston 16 moves to the right until the recess 22 blocks the grooves 15 and 23. After that, the groove 23 connects to the drain line 25, Throttle 10 creates a prop, resulting in command golds to 2 moves to the far left. The cycle is repeated. The throttle B regulates the flow rate of the Fluid through the safety valve, gauge b checks its response pressure, and tightness is checked with the valve 7 closed., Invention The device for testing the safety valves of hydromechanical supports, is multi-key. PL-ikator with a cavity of high and low pressure, a command spool with control chambers, throttles, check valves, test chamber, pressure gauge, pressure and discharge lines, with, purpose 1; 1o: to determine the efficiency of mining tests under mine conditions by providing an automatic control mode for the multiplicator; the multiplier is made with two cavities: high and low / pressure; and with qi-. unconnected control recesses that communicate with the control spool control cameras with the possibility of alternately connecting the pressure and drain lines to the high and low pressure cavities of the multiplier, while one of the cavities of the high pressure multiplier soyedinya with the test chamber. Sources of information taken into account in the examination 1, USSR Author's Certificate No. 501169, class, Е 21 D 23/16, 1972, 2, USSR Author's Certificate 21.2930, class, Е.21 D 15/44, 1966 ().