SU825992A1

SU825992A1 - Hydraulic prop

Info

Publication number: SU825992A1
Application number: SU792810713A
Authority: SU
Inventors: Николай Иванович Павлов
Original assignee: Pavlov Nikolaj
Priority date: 1979-08-10
Filing date: 1979-08-10
Publication date: 1981-04-30

Description

Изобретение относится к горному, делу и Может быть использовано для шахтных гидрофицированных крепей, устанавливаемый в очистных выработках $ при разборке пластовых месторождений.' Известны гидравлические стойки, включающие цилиндр, шток, напорную и сливную магистрали, предохранительный клапан с выходным каналом, гидрозамок и распределитель [1].The invention relates to mining, business and can be used for mine hydroficated supports, installed in the mine workings $ during the dismantling of reservoir deposits. ' Known hydraulic racks, including a cylinder, rod, pressure and drain lines, a safety valve with an outlet channel, a hydraulic lock and a distributor [1].

К недостаткам таких устройств относится то, что давление на секции крепи по длине забоя распределяется неравномерно, поэтому при постоянном предельном сопротивлении гидроопор невозможно активно управлять кровлей. Причем перенастройка предохранительных клапанов представляет собой трудоемкий процесс, требующий больших затрат рабочего времени, что приводит к снижению производительности труда по добыче полезного ископаемого.The disadvantages of such devices include the fact that the pressure on the lining sections along the length of the face is unevenly distributed, so with a constant maximum resistance of the hydraulic supports it is impossible to actively control the roof. Moreover, the reconfiguration of the safety valves is a labor-intensive process that requires large expenditures of working time, which leads to a decrease in labor productivity in mining.

Наиболее близкой к предлагаемой является гидростойка, включающая шток., напорную и сливную магистрали, предохранительный клапан с подводом й отводом, гидрораспределитель с каналами, гидрозамок, гидроаккумулятор с нодпоршневой и надпоршневой полостями и выходным отверстием [2].Closest to the proposed one is a hydraulic stand including a stem., Pressure and drain lines, a safety valve with an inlet and outlet, a valve with channels, a hydraulic lock, a hydraulic accumulator with a piston and a piston cavity and an outlet [2].

Недостатком этого устройства является неравномерное распределение давления на секции крепи.The disadvantage of this device is the uneven distribution of pressure on the lining sections.

Цель изобретения — увеличение зоны плавного нарастания несущей способности гидростойки.The purpose of the invention is the increase in the zone of smooth growth of the bearing capacity of the hydraulic pillar.

Для достижения поставленной цели гидроаккумулятор выполнен с дренажным отверстием, расположенным в подпоршневой полости с возможностью его 'периодического соединения со входным отверстием, сообщенным с отводом предохранительного клапана и канайЬм гидрораспределителя.To achieve this goal, the accumulator is made with a drainage hole located in the under-piston cavity with the possibility of its periodic connection with the inlet connected to the outlet of the safety valve and the direction of the valve.

На чертеже изображена принципиальная схема предлагаемой гидростойки.The drawing shows a schematic diagram of the proposed hydroracks.

Гидравлическая стойка содержит шток 1, поршневую 2 и штоковую 3 полости цилиндра, предохранительный клапан 4, гидроаккумулятор 5, в корпусе которого размещены поршень 6, пружина 7 и отверстие 8 для слива, гидрозамок 9, гидрораспределитель 10, сливную 11 и напорную 12 гидромагистрали. Выходной канет предохранительного клапана 4 и входной канал гидроаккумулятора 5 подключены к гидрораспределителю 10.The hydraulic rack contains a rod 1, piston 2 and rod 3 of the cylinder cavity, a safety valve 4, a hydraulic accumulator 5, in the body of which a piston 6, a spring 7 and a drain hole 8, a hydraulic lock 9, a hydraulic distributor 10, a drain 11 and a pressure head 12 of the hydraulic line are placed. The output channel of the safety valve 4 and the inlet channel of the accumulator 5 are connected to the valve 10.

Стойка работает следующим образом.Rack works as follows.

Рабочая нагрузка, создаваемая перекрытием крепи, действует на шток 1 гидростойки и воспринимается рабочей жидкостью, находящейся в поршневой полости 2. При значительном увеличении горного давления на перекрытие, -превышающем величину предельного рабочего сопротивления, предохранительный клапан 4 срабатывает, жидкость из поршневой полости 2 через выходной канал предохранительного клапана 4 поступает в гидроаккумулятор 5, воз- ’ действуя на его поршень. По мере накопления жидкости поршень 6 сжимает пружину 7, создавая дополнительный напор на пружину предохранительного клапана и увеличивая его сопритивле- 15 ние на открывание.The working load created by the lining overlap acts on the rod 1 of the hydraulic stand and is perceived by the working fluid located in the piston cavity 2. With a significant increase in rock pressure on the overlap, which exceeds the maximum working resistance, the safety valve 4 is activated, the fluid from the piston cavity 2 through the outlet the channel of the safety valve 4 enters the accumulator 5, acting on its piston. As fluid accumulates, piston 6 compresses spring 7, creating additional pressure on the safety valve spring and increasing its resistance to opening 15.

Таким образом, после каждого срабатывания предохранительного клапана 4 его сопротивление увеличивается до выбора упругой податливости пружины 20 7. Для предохранения от разрыва замкнутой системы служит сливное отверстие 8, через которое жидкость прй предельном отжатии пружины стравливается наружу. Для слива жидкости из 25 надпоршневой полости гидроаккумулятора 5 гидрораспределитель 10 ставится в положение ‘’слив’¹, при котором выходные каналы предохранительного клапана 4 и гидроаккумулятора 5 сое- __ диняются со сливной магистралью 11, ·*^ϋ и жидкостью под действием пружины 7 вытесняется в сливную магистраль. Во всех остальных положениях гидрораспределителя каналы гидроаккумулятора и 'предохранительного клапана закрыты,Thus, after each actuation of the safety valve 4, its resistance increases until the elastic compliance of the spring 20 7 is selected. To protect against rupture of the closed system, a drain hole 8 is used, through which the liquid is pressed out to the limit of the maximum spring release. To drain the fluid from the 25 over-piston cavity of the hydraulic accumulator 5, the hydraulic distributor 10 is set to the “drain” position ¹ , at which the output channels of the safety valve 4 and the hydraulic accumulator 5 are connected with the drain line 11, * * ^ϋ and the liquid drain line. In all other positions of the valve, the channels of the accumulator and the safety valve are closed,

Таким образом, изобретение позволяет увеличить сопротивление секций крепи при изменениях горного давления, обеспечивая плавную гидравлическую податливость. Кроме того, предлагаемая стойка позволяет обеспечить переменное сопротивление по длине забоя и выемочного столба.Thus, the invention allows to increase the resistance of the lining sections with changes in rock pressure, providing a smooth hydraulic compliance. In addition, the proposed rack allows you to provide variable resistance along the length of the face and the extraction column.

Claims

The invention relates to the mining, business and can be used for mine hydraulic roof supports, installed in the treatment output during the dismantling of reservoir deposits. Hydraulic racks are known, including cylinder, rod, discharge and drain line, safety valve with outlet channel, hydraulic lock and distributor 1. K The disadvantages of the devices include the fact that the pressure on the lining section is unevenly distributed over the length, therefore, with a constant limiting resistance, the hydrophor can not be actively controlled It is a roof. Moreover, the reconfiguration of safety valves is a laborious process that requires a lot of working time, which leads to a decrease in labor productivity in the extraction of minerals. Closest to the proposed one is a hydraulic post, which includes a full pressure and drain master valves, a safety valve with inlet and outlet, a hydraulic valve with channels, a hydraulic lock, a hydraulic accumulator with a piston and rear piston cavities and an outlet 2. The disadvantage of this device is the uneven distribution of pressure on lining sections. The purpose of the invention is to increase the zone of smooth growth of the bearing capacity of a hydrocall. To achieve this goal, the hydroaccumulator is made with a drainage hole located in the piston cavity with the possibility of its periodic connection with the inlet port communicated with the relief valve and the hydraulic distributor kanaym. The drawing shows a schematic diagram of the proposed hydraulic post. The hydraulic strut includes a rod 1, a piston 2 and a rod 3 cylinder cavities, a safety valve 4, a hydraulic accumulator 5, in the case of which a pore 6, a spring 7 and an opening 8 for discharge, a hydraulic lock 9, a hydraulic valve 10, a drain 11 and a pressure 12 hydraulic line are located. Output kangsh safety valve 4 and the input channel. Hydroaccumulator 5 is connected to the valve 10. The rack works as follows. The working load created by the overlap of the lining acts on the rod 1 of the hydraulic rack and is perceived by the working fluid in the piston cavity 2. With a significant increase in rock pressure on the overlap exceeding the limit working resistance, the safety valve 4 is activated, the fluid from the piston cavity 2 through the output channel of the safety valve 4 enters the hydroaccumulator 5, acting on its piston. As the fluid accumulates, the piston 6 presses the spring 7, creating an additional pressure on the spring of the safety valve and increasing its resistance to opening. Thus, after each actuation of the safety valve 4, its resistance increases until the elastic compliance of the spring 7 is selected. To protect against the rupture of the closed system, the drain hole 8 serves and through the cohort fluid, when the spring is pushed, extinguishes the outside. To drain the fluid from the over-piston cavity of the hydroaccumulator 5, the hydraulic distributor 10 is placed in a drainage position, in which the outlets of the safety valve 4 and the hydraulic accumulator 5 are connected to the drain line 11, and the fluid is displaced to the drain line by the action of the spring 7. In all other positions of the hydraulic distributor, the channels of the hydroaccumulator and the safety valve are closed. Thus, the invention allows to increase the resistance of the support sections with changes in rock pressure, providing smooth hydraulic compliance. In addition, the proposed rack allows for variable resistance along the bottom and extraction column. The invention of the hydraulic pillar, including notOK, pressure and drain lines, safety valve with inlet and outlet, hydraulic valve with channels, hydraulic lock, hydraulic accumulator with piston and rear piston cavities and outlet opening, which is designed to increase the bearing capacity of the hydraulic rack, the hydroaccumulator is made with a drainage hole located in the piston cavity with the possibility of its periodic connection with the inlet port communicated with safety valve house and hydraulic valve distributor. Sources of information taken into account in the examination 1. USSR author's certificate number 415378, cl. E 21 D 15/44, 1972.

2. USSR author's certificate f 461228, cl. E 21 .D 15/44, 1972 (prototype).

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