SU969981A1

SU969981A1 - Hydraulic control system of multiple-section powered mining roof support

Info

Publication number: SU969981A1
Application number: SU802914430A
Authority: SU
Inventors: Александр Иванович Пархоменко; Юрий Филиппович Пономаренко; Александр Федорович Черкашин; Евгений Маркович Лемента
Original assignee: Горловский Рудоремонтный Завод Производственного Объединения "Донецкуглеремонт"
Priority date: 1980-04-18
Filing date: 1980-04-18
Publication date: 1982-10-30

Description

Изобретение относится к горнодобывающей промышленности, а именно к креплению забоев угольных шахт при неустойчивых породах и предназначено для управления забойным комплексом при безлюдной выемке. ⁵ The invention relates to the mining industry, and in particular to the fastening of the faces of coal mines with unstable rocks and is intended to control the face complex with unmanned excavation. ⁵

Известна гидросистема управления многосекционной механизированной крепью, содержащая напорную сливную _J()и управляющую гидролинии и установленные в каждой секции гидроцилиндры стоек и гидродомкрат передвижения конвейера со штоковыми и бесштоковыми полостями, сообщенными через двух-,5 позиционный гидроуправляемый распределитель с напорной и сливной гидролинией [1].A well-known hydraulic control system for multi-section mechanized lining, containing a pressure discharge drain _{J ()} and a control hydraulic line and installed in each section hydraulic cylinders of racks and a hydraulic jack for moving the conveyor with rod and rodless cavities communicated through a two-, 5-position hydraulically controlled distributor with a pressure and drain hydraulic line [1] .

Недостатком известной гидросисте- 20 мы являются ее сложность, наличие электрогидроклапанов, что ограничивает область применения гидросистемы и снижает надежность ее работы.A disadvantage of the known hydraulic system 20 is its complexity, the presence of electro-hydraulic valves, which limits the scope of the hydraulic system and reduces the reliability of its operation.

Цель изобретения - повышение надежности и расширение функциональных возможностей гидросистемы.The purpose of the invention is improving reliability and expanding the functionality of the hydraulic system.

Указанная цель достигается тем, что каждая секция гидросистемы снабжена механически управляемым клапаном, установленным в одной из полостей гидродомкрата и дополнительным двухпозиционным гидроуправляемым распределителем, подключенным последовательно с основным, а полости управления обоих распределителей каждой секции сообщены между собой через клапан,причем полость управления дополнительного распределителя одной из секций сообщена с управляющей гидролинией, а бесштоковые полости гидроцилиндров каждой секции сообщены с полостью управления дополнительного распределителя смежной секции.This goal is achieved by the fact that each section of the hydraulic system is equipped with a mechanically controlled valve installed in one of the cavities of the hydraulic jack and an additional two-position hydraulically controlled distributor connected in series with the main one, and the control cavities of both distributors of each section are connected to each other through the valve, and the control cavity of the additional distributor is one of the sections communicated with the control hydraulic line, and rodless cavities of the hydraulic cylinders of each section communicated with the cavity control additional distributor adjacent section.

На чертеже представлена схема гидросистемы ,The drawing shows a diagram of a hydraulic system,

Гидросистзма содержит гидроцилиндры 1 стоек, имеющих штоковую и бесштоковую рабочие полости 2 и 3, гидродомкраты 4, включающие поршни 5, штоковые и бесштоковые рабочие полости 6 и 7, которые передвигают конвейер 8. Напорная и сливная гидролинии 9'и 10 сообщены через основной и дополнительный распределители 11 и с полостями 2 и 3 гидроцилиндров 1 и с полостью 6 гидродомкрата 4. Распределители 11 и 12 имеют полость и 14 управления, причем полость 14 распределителя 12 первой секции сообщена с управляющей гидролинией ‘15» а бесштоковая полость 7 гидродомкрата 4 сообщена через гидрозамок 1б<с полостью 17 управления с гидролиниейThe hydraulic system contains hydraulic cylinders 1 of racks having a rod and rodless working cavities 2 and 3, hydraulic jacks 4, including pistons 5, rod and rodless working cavities 6 and 7, which move the conveyor 8. Pressure and drain hydraulic lines 9'i 10 are communicated through the main and additional distributors 11 and with cavities 2 and 3 of hydraulic cylinders 1 and with a cavity 6 of hydraulic jack 4. Distributors 11 and 12 have a cavity and 14 controls, moreover, the cavity 14 of the distributor 12 of the first section is in communication with the control hydraulic line '15 ”and the rodless cavity 7 of the hydraulic jack 4 communicated through a hydraulic lock 1b <with a control cavity 17 with a hydraulic line

18. В бесштоковой полости 7 установлен клапан 19 с толкателем 20.18. In the rodless cavity 7, a valve 19 with a pusher 20 is installed.

Распределители 11 и 12 е>ыполнены с пружинами 21. Гидроцилиндры 1 стоек снабжены предохранительными клапанами 22 и гидрозамками 23 и полостями 24 управления.The distributors 11 and 12 e> are made with springs 21. The hydraulic cylinders 1 of the racks are equipped with safety valves 22 and hydraulic locks 23 and control cavities 24.

Гидросистема работает следующим образом.The hydraulic system works as follows.

Первоначально распределитель 11 находится в левом, а распределитель 12 в правом положении (по чертежу). При этом секции расперты и поддерживают кровлю, а штоковые полости 2 и 6 гидроцилиндров 1 стоек и гидродомкратов 4 соединены со слив¹ной гидролинией 10. Для передвижения секций крепи к контейнеру 8 рабочаяInitially, the distributor 11 is in the left, and the distributor 12 in the right position (according to the drawing). At the same time, the sections are open and support the roof, and the rod cavities 2 and 6 of the hydraulic cylinders 1 of the racks and hydraulic jacks 4 are connected to the drain ¹ hydraulic line 10. For the movement of the sections, support the container 8 working

IS вое положение (по чертежу) . При этом жидкость из напорной гидролинии 9 через распределители 11 и 12, гидрозамки 23 поступает вбесштоковые полости 3 гидроцилиндров 1 стоек первой секции и в полость 14 управления распределителя 12 второй секции. Вытесняемая из штоковых полостей 12 гидроцилиндров 1 первой секции жидкость через распределители 12· и 11 поступает в сливную гидролинию 10.IS voe position (according to the drawing). In this case, the liquid from the pressure hydraulic line 9 through the distributors 11 and 12, the hydraulic lock 23 enters the rodless cavities 3 of the hydraulic cylinders 1 of the racks of the first section and into the control cavity 14 of the distributor 12 of the second section. The liquid displaced from the rod cavities 12 of the hydraulic cylinders 1 of the first section through the distributors 12 · and 11 enters the drain hydraulic line 10.

Первая секция распирается между кровлей и почвой (не показаны), распределители 11 второй и последующей секций находятся в левом положении, а распределитель 12 - в правом. При достижении определенного давления в бесштоковых полостях 3 гидроцилиндров 1 первой секции и в полости 14 управления распределителя 12 второй секции, последний переключается в левое положение, (по чертежу). Далее работа гидросистемы, связанная с передвижением к конвейеру 8 второй секции аналогична работе гидросистемы при передвижении первой секции. После окончания передвижения и распора, второй секции переключается распределитель 12 третьей секции (не показана). Таким образом процесс волнового последовательного передвижения секций крепи будет продолжаться до тех пор, пока не будет передвинужидкость поступает в управляющую гидролинию 15, при этом распределитель ,12 первой секции переключается влево (по чертежу) . Затем рабочая жидкость под давлением поступает в напорную гидролинию 9, при этом жидкость проходит через распределители 11 и 12 первой секции, в штоковую полость 6 гидродомкрата 4, в полость управления 17 гидрозамком 16 и в штоковые полости 2 гидроцилиндров 1 стоек. Бесштоковые полости 3 и 7 гидроцилиндров 1 и гидродомкрата 4 сообщаются со сливной гидролиниями 10 и гидролинией 18.The first section is bursting between the roof and the soil (not shown), the distributors 11 of the second and subsequent sections are in the left position, and the distributor 12 is in the right. When a certain pressure is reached in the rodless cavities 3 of the hydraulic cylinders 1 of the first section and in the control cavity 14 of the distributor 12 of the second section, the latter switches to the left position (according to the drawing). Further, the operation of the hydraulic system associated with movement to the conveyor 8 of the second section is similar to the operation of the hydraulic system when moving the first section. After the end of movement and pressure, the second section switches the distributor 12 of the third section (not shown). Thus, the process of wave sequential movement of the lining sections will continue until the fluid moves into the control hydraulic line 15, while the distributor 12 of the first section switches to the left (according to the drawing). Then, the working fluid under pressure enters the pressure hydraulic line 9, while the fluid passes through the distributors 11 and 12 of the first section, into the rod cavity 6 of the hydraulic jack 4, into the control cavity 17 by the hydraulic lock 16 and into the rod cavities 2 of the hydraulic cylinders 1 of the racks. Rodless cavities 3 and 7 of the hydraulic cylinders 1 and the hydraulic jack 4 communicate with the drain hydraulic lines 10 and hydraulic line 18.

Это вызывает разгрузку секции и перемещение ее к конвейеру 8. При достижении поршнем 5 гидродомкрата 4 крайнего сдвинутого положения, поршень 5 воздействует на толкатель 20 и открывает клапан 19, в результате чего жидкость из полости 14 управления распределителя 12 поступает в полость 13 управления распределителя 11, переключая его в пра та и расперта последняя от начала передвижения крепи секция или не будет снято давление рабочей жидкости в управляющей гидролинии 15. При этом под действием пружин 21 оба ад распределителя 11 и 12 первой секции переключаются в первоначальное положение, что вызывает последовательное переключение распределителей 11 и 12 в первоначальное положение на ос₄₅ тальных секциях.This causes the section to be unloaded and moved to the conveyor 8. When the piston 5 of the hydraulic jack 4 reaches its extreme shifted position, the piston 5 acts on the pusher 20 and opens the valve 19, as a result of which the liquid from the control chamber 14 of the distributor 12 enters the control chamber 13 of the distributor 11, switching it to the right and the last section from the beginning of the movement of the lining is opened or the working fluid pressure in the control hydraulic line 15 will not be relieved yuchayutsya to its original position, causing sequential switching valves 11 and 12 in the original position on the axes ₄₅ for Basic sections.

Для передвижения конвейера 8 жид, кость под давлением подают в гидролинию 18, откуда она поступает через гидрозамки 16 в бесштоковые полости гидродомкратов 4, что вызывает ⁵⁰ фронтальное передвижение конвейера на забой. Вытесняемая из штоковых полостей 6 жидкость через распределители 11 и 12 поступает в сливную гидролинию 10. При работе угледобы⁵⁵ вающего агрегата (не показан) гидрозамки запирают бесштоковые полости 7 гидродомкра>ов 4, препятствуя отжиму агрегата от забоя. Регулируя подачу в напорную гидролинию 9 можно добиться автоматического синхронного перемещения секций крепи вслед за проходом угледобывающего агрегата Кроме того, распределители 11 и 12 могут быть выполнены с ручным управлением.To move the conveyor 8, the fluid, the bone under pressure is fed into the hydraulic line 18, from where it enters through the hydraulic locks 16 into the rodless cavities of the hydraulic jacks 4, which causes ⁵⁰ frontal movement of the conveyor to the face. The liquid displaced from the rod cavities 6 through the distributors 11 and 12 enters the drain hydraulic line 10. During operation of the coal mining unit ⁵⁵ (not shown), the hydraulic locks lock the rodless cavities 7 of the hydraulic jacks> 4, preventing the unit from squeezing. By adjusting the supply to the pressure hydraulic line 9, it is possible to achieve automatic synchronous movement of the lining sections after the passage of the coal mining unit. In addition, the distributors 11 and 12 can be made with manual control.

Claims

(5) HYDROSYSTEM OF MANAGEMENT OF MULTIPLE MECHANIZED FASTENER The invention relates to the mining industry, namely to securing the bottom of coal mines in unstable rocks and is intended to control the bottomhole complex during unmanned excavation. The hydraulic control system of a multisection mechanized roof support is known, comprising a pressure discharge and control hydraulic lines and hydraulic racks mounted in each section and a hydraulic slide of the conveyor with rod and rodless cavities communicated through a two-position hydraulic control valve with a pressure relief line. complexity, the presence of electro-hydraulic valves, which limits the scope of the hydraulic system and reduces the reliability of its work. The purpose of the invention is to increase the reliability and enhance the functionality of the hydraulic system. This goal is achieved by the fact that each section of the hydraulic system is equipped with a mechanically controlled valve installed in one of the cavities of the hydraulic cylinder and an additional two-way hydraulically controlled valve connected in series with the main one, and the control cavities of both valves of each section communicate with each other through the valve, and the control cavity of the additional valve the distributor of one of the sections communicates with the control hydroline, and the rodless cavities of the hydraulic cylinders of each section communicate with the floor Stu additional control distributor adjacent section. The drawing shows a hydraulic system diagram. The hydraulic system contains hydraulic cylinders 1 of struts having rod and rodless working cavities 2 and 3, hydraulic jacks j including pistons 5, rod and rodless working cavities 6 and 7. which move the conveyor 8. Pressure head and drain hydraulics 9 and 10 are communicated through the primary and secondary distributors 11 and 12c by cavities 2 and 3 of the hydraulic cylinders and with the cavity 6 of the hydraulic cylinder k. The distributors PI 12 have a cavity 13 and I of the control, and the cavity 1 of the distributor 12 of the first section communicates with the control hydroline 15 and the rodless cavity 7 of the hydraulic jack C is communicated through the hydraulic lock 1b (C cavity 17 controls the hydroline 18. In valveless cavity 7, a valve 19 is installed pusher 20. Distributors 11 and 12 E) are made with springs 21. The hydraulic cylinders 1 of the struts are equipped with safety valves 22 and hydraulic locks 23 and control cavities 2t. The hydraulic system works as follows. Initially, the distributor 11 is in the left, and the distributor 12 is in the right position (according to the drawing). The sections are open and support the roof, and the rod cavities 2 and 6 of the hydraulic cylinders 1 of the uprights and hydraulic jacks k are connected to the drain hydroline 10. To move the securing sections to the container 8, the working fluid enters the control hydraulic 15, the distributor, 12 the first section switches to the left (according to the drawing). Then, the working fluid under pressure enters the pressure hydraulic line 9, while the liquid passes through the distributors 11 and 12 of the first section, into the rod cavity 6 of the hydraulic cylinder, into the control cavity 17 of the hydraulic lock 1b and into the rod cavities 2 of the hydraulic cylinders of 1 column. The rodless cavities 3 and 7 of the hydraulic cylinders 1 and of the hydraulic jack 4 communicate with the drain hydraulic lines 10 and the hydraulic line 18. This causes unloading of the section and moving it to the conveyor 8. When the piston 5 reaches the hydraulic cylinder t of the extreme shifted position, the piston 5 acts on the plunger 20 and opens the valve 19, as a result of which the liquid from the cavity 1 of the control valve 12 enters the cavity 13 of the control valve 11, switching it to the right position (according to the drawing). At the same time, fluid from the pressure line 9 through the distributors 11 and 12, the hydraulic locks 23 enters the rodless cavities 3 of the hydraulic cylinders 1 of the racks of the first section and into the cavity I of the control of the distributor 12 of the second section. Expelled from the rod cavities 12 of the hydraulic cylinders 1 of the first section, the liquid flows through the distributors 12 and 11 into the drainage line 10. The first section extends between the roof and the ground (not shown), the distributors 11 of the second and subsequent sections are in the left position, and the distributor 12-8 right When a certain pressure is reached in rodless cavities 3 of the hydraulic cylinders 1 of the first section and in the control cavity k of the distributor 12 of the second section, the latter switches to the left position (according to the drawing). Further, the operation of the hydraulic system associated with moving to the conveyor 8 of the second section is similar to the operation of the hydraulic system when moving the first section. After the end of the movement and thrust, the second section switches the valve 12 of the third section (not shown). Thus, the process of wave sequential movement of the support sections will continue until the last from the beginning of the movement of the support section is moved and unwrapped or the pressure of the working fluid in the control line 15 is released. Under the action of the springs 21, both distributors 11 and The 12 sections of the first section are switched to their original position, which causes the sequential switching of the valves 11 and 12 to their original position on the remaining sections. To move the conveyor 8, pressurized fluid is supplied to the hydroline 18, from where it enters through hydraulic locks 1b into rodless cavities 7 hydraulic jacks k, which causes frontal movement of the conveyor 8 to the bottom. The fluid displaced from the rod cavities 6 through the distributors 11 and 12 enters the drain hydroline 10. When the coal-mining unit (not shown) is working, the hydraulic locks lock the rodless cavities of the hydraulic cavities 7, preventing the unit from spinning from the bottom. By adjusting the feed to the pressure line 9, automatic synchronous transfer of the lining sections can be achieved following the passage of the coal-mining unit. In addition, the distributors 11 and 12 can be made manually controlled. Claims of the Invention Hydraulic control system of multisection mechanized support, containing pressure, drain and control hydraulic lines and hydraulic racks installed in each section and a hydraulic slide of the conveyor with rod and rodless cavities communicated through a two-position hydraulically controlled valve with a pressure and rodless cavities communicated through a two-position hydraulic control valve with a pressure profile and a rodless cavity that is connected through a hydraulic valve with a pressure valve and rodless cavities, communicated through a hydraulic valve with a pressure valve and a rodless cavity that is connected through a hydraulic valve with a pressure valve and rodless cavities, communicated through a hydraulic valve with a pressure valve and a rodless cavity that is connected through a hydraulic valve with a pressure valve and rodless cavities, communicated through a hydraulic valve with a pressure valve and a rodless cavity that is connected to a hydraulic valve with a rod and rodless cavities, communicated through a hydraulic valve with a hydraulic valve and a rodless shaft connected to a hydraulic valve with a rod and rod stock, and with a hydraulic valve so that, in order to increase reliability, each section of the hydraulic system is equipped with a mechanically controlled valve installed in one of the cavities hydraulic jack, and an additional on-off hydraulically controlled valve connected in series with the main one, and the control cavities of both, the distributors of each section communicate with each other through a valve, the control cavity of the additional distributor of one of the sections communicating with the hydraulic control line, and the rodless cavities of the hydraulic cylinders of each section communicated with the control cavity of the additional distributor of the adjacent section. Sources of information taken into account during the examination 1. Bratchenko B. F. Complex non-complex. Hanizatsii cleaning work in coal mines. M., Nedra, p. 296-301.