SU848678A1

SU848678A1 - Power roof support unit

Info

Publication number: SU848678A1
Application number: SU792846636A
Authority: SU
Inventors: Николай Тихонович Богатырев
Original assignee: Ордена Трудовгго Красного Знамениинститут Горного Дела Им.A.A.Cko-Чинского
Priority date: 1979-12-04
Filing date: 1979-12-04
Publication date: 1981-07-23

Description

Изобретение относится к горной про№1шленности.'The invention relates to the mining industry. '

Известна секция Механизированной ’ крепи, содержащая гидростойку с .гидрозамками, предохранительными клала- * нами и гидроаккумулятором, накапливающим рабочую жидкости, вытесняемую из стойки, и обеспечивающим медленный выход гидростойки на режим номинального сопротивления fl ];The section of the Mechanized ’lining is known, containing a hydraulic stand with hydraulic locks, safety valves * and a hydraulic accumulator, accumulating working fluid displaced from the rack and providing a slow exit of the hydraulic stand to the nominal resistance mode fl];

Недостатком данной крепи является то, что она не обеспечивает быстрого вывода стойки на номинальное сопротивление, в результате чего за цикл работы крепи стойка может не выйти на рабочий режим, что снижает эффективность поддержания кровли.The disadvantage of this lining is that it does not provide a quick output of the rack to the nominal resistance, as a result of which, during the cycle of operation of the lining, the rack may not enter the operating mode, which reduces the efficiency of maintaining the roof.

- Известна также секция механизированной крепи, содержащая гидростойки, поршневые полости которых через раз- _пгрУзочный,.предохранительный клапаны,· блок подпора и секционный распредели-, тель соединены напорной и сливной магистралями с насосной станцией. Под держание кровли осуществляется гидростойкой вначале за-счет предварительного распора, а затем за счет опуска ния кровли и нарастания давления рабочей жидкости в поршневой полости стойки, которая заперта'разгрузочным н предохранительным клапанами [2].- also known support frame section, comprising gidrostoyki, piston cavity through which different _n grUzochny, .predohranitelny valves · pressurization unit and sectional distributor, Tel and a drain connected to the discharge pipe of the pump station. The roof is supported by water resistance at first due to preliminary expansion, and then by lowering the roof and increasing the pressure of the working fluid in the piston cavity of the rack, which is locked by unloading and safety valves [2].

Указанная секция механизированной , крепи не обеспечивает быстрого вывода стойки на режим номинального сопротив ления н при микроутечках жидкости из поршневой-полости несущая способность стойки резко падает.The indicated mechanized section, the lining does not provide a quick output of the rack to the nominal resistance mode n with micro leakage of fluid from the piston-cavity, the bearing capacity of the rack drops sharply.

Наиболее близким решением по технической сущности и достигаемому результату к предлагаемой является секция механизированной крепи*' содержащая гидрбстойки, поршневые полости которых соединены с предохранительньн, разгрузочным клапанами и с распределителем, домкраты передвижения, переключатели phcnbpa и гидромагнстралн напора, слива н управления. Поддержание кровли осуществляется гидростойп з 848678 4 ками вначале за счет предварительного распора от общей насосной станции, затем за счет нарастания давления в .гидростойке за счет опускания кровли, которая ограничивается вначале пред- _i ¹охранительным клапаном .низкого давления, а затем предохранительным клала** . ном номинального сопротивления [з].The closest solution in terms of technical nature and the achieved result to the proposed one is the mechanized support section * 'containing hydraulic struts, the piston cavities of which are connected to the safety, relief valves and the distributor, travel jacks, phcnbpa switches and hydraulic head, drain and control. Maintaining roof made of gidrostoyp 848678 4 kami first by pre-pumping thrust of the total station, then due to pressure buildup in .gidrostoyke by lowering the roof, which is limited first pre _i ¹ .nizkogo enjoying the protection valve pressure and then put her safety ** . nom of nominal resistance [h].

Эта система также не обеспечивает быстрого вывода стойки на режим номн- ю иального сопротивления, и при незначительных утечках жидкости из поршневой полости стойки несущая способность стойки падает. В результате не обеспечивается эффективное поддержание кров- и щи.This system also does not provide a quick output of the rack to the nominal resistance mode, and with minor leakage of liquid from the piston cavity of the rack, the bearing capacity of the rack decreases. As a result, the effective maintenance of blood and cabbage is not provided.

Цель изобретения - ускорение вывода гидростойки на номинальное сопротивление и повышение надежности работы ее в этом режиме. ²⁰ The purpose of the invention is the acceleration of the output of the hydraulic stand at nominal resistance and increase the reliability of its operation in this mode. ²⁰

Поставленная цель достигается тем, что секция механизированной крепи снабжена обратным клапаном, дросселем н насосом высокого давления, а переключатель распора имеет камеры входа, ^2Sвыхода и управления, при этом камера управления переключателя и подклапанная камера обратного клапана соединены с поршневой полостью стойки, а надклапанная камера обратного клапана соединена с камерой выхода переключателя, камера входа которого через дрос- . сель соединена гидромагистралью напора с насосом высокого давления. 'This goal is achieved in that the powered roof section is equipped with a check valve, a throttle and a high-pressure pump, and the thrust switch has input chambers, ^2S output and control chambers, while the control chamber of the switch and the under-valve chamber of the non-return valve are connected to the piston cavity of the rack, and the over-valve chamber the check valve is connected to the outlet chamber of the switch, the inlet chamber of which through the dros-. The mudflow is connected by a pressure hydraulic line to a high pressure pump. ''

На чертеже изображена, секция механизированной крепи.The drawing shows a section of powered roof supports.

Секция механизированной крепи со- . •стоит из гйдравличе$ких стоек- 1, порш-‘ иевые полости которых соединены через обратные клапаны 2 с выходными камера- . ми А переключателей 3, с камерами управления Б этих переключателей и с предохранительным 4 и разгрузочным 5 клапанами, которые через секционный гидрораспределитель 6 соединены магистралями напора 7 и слува 8 с насосной станцией 9 .Камера входа В переклю-” чателя 3.соединена через дроссель 1О и гндромагистраль 1I распора с насо- : сом 12 высокого давления. Для регулирования величины срабатывания переключателя 3 он имеет пружину 13. В исходном положении, т.е. когда давление и гидравлических стойках I и гидромагистралях отсутствует, переключатель 3 с помощью пружины 13, настроенной на величину предварительного распора, изолирует магистраль 11 рас• <Mechanized roof support section • Stands from hydraulic racks-1, the piston евые cavities of which are connected through check valves 2 to the outlet chambers-. A of switches 3, with control chambers B of these switches and with safety 4 and unloading 5 valves, which are connected via a pressure distributor 6 to the pressure lines 7 and 8 to the pump station 9. The input chamber to the switch 3. is connected through a 1O throttle and a main flow line 1I with a pump 12: high pressure. To regulate the response value of the switch 3, it has a spring 13. In the initial position, i.e. when there is no pressure on both the hydraulic struts I and the hydraulic lines, switch 3 isolates the line 11 of the races • <with the help of a spring 13 adjusted to the value of the preliminary thrust

’пора от поршневой полости гидравлических стоек 1. Для передвижения секции крепи и конвейера имеется гидродомкрат 14. Для визуального контроля величины давления в гидростойке переключатель 3 может иметь индикатор давления, показывающий стержень 15 которого поджат пружиной 13 к золотнику переключателя 3.“It’s time from the piston cavity of the hydraulic struts 1. There is a hydraulic jack 14 for moving the lining section and the conveyor 14. To visually control the pressure in the hydraulic stand, switch 3 may have a pressure indicator showing the rod 15 of which is spring-loaded against the spool of switch 3.

I . . Секция работает следующим образом.I. . The section works as follows.

Распор гидравлической стойки I, выполняемый обычно после передвижки секции крепи гидродомкратом 14, осуществляется путем соединения распределителем 6 поршневой полости гидравлической стойки 1 через разгрузочный клапан 5, магистраль 7 напора с насосной станцией 9 большой производительности. Гидравлическая стойка 1 распирается до величины начального распора. Так как переключатель 3 пружиной 13 настроен на величину начального распора, то при достижении в поршневой полости гидравлической стойки I этой величины переключатель 3 под действием поршня, расположенного в камере управления Б, переключается и соединяет между собой камеры А и В. После этого насос 12 высокого, давления, нагнетающий к потребителям по магистрали i1 распора рабочую жидкость под давлением, равным или немного меньшим номинального давления гидравлической стойки 1, на котором настроен предохранительный клапан 4, через магистраль 11 распора, дроссель 10, переключатель 3 и обратный клапан 2 нагнетает .рабочую жидкость в поршневую полость гидравлической стойки I до номинального давления. При снятии распора с гидравлической стойки I ее поршневая полость соединяется через разгрузочный клапан 5 со сливом, и давление в поршневой полости и камере управления Б переключателя 3 резко падает, а переключатель 3 пружиной 13 отключает магистраль И распора от гидравлической стойки 1.The hydraulic strut I spacer, which is usually carried out after moving the lining section with a hydraulic jack 14, is carried out by connecting the distributor 6 of the piston cavity of the hydraulic strut 1 through the discharge valve 5, the pressure line 7 with a high-capacity pumping station 9. The hydraulic strut 1 is bursting to the size of the initial expansion. Since the switch 3 is adjusted by the spring 13 to the value of the initial thrust, then when the piston cavity of the hydraulic strut I reaches this value, switch 3, under the action of the piston located in the control chamber B, switches and interconnects chambers A and B. After that, the pump 12 is high , the pressure that pumps the working fluid to consumers along the expansion line i1 under a pressure equal to or slightly lower than the nominal pressure of the hydraulic rack 1, on which the safety valve 4 is configured, through the line 11 r aspora, throttle 10, switch 3 and check valve 2 pumps the working fluid into the piston cavity of the hydraulic strut I to the nominal pressure. When removing the pressure from the hydraulic rack I, its piston cavity is connected via a discharge valve 5 to the drain, and the pressure in the piston cavity and control chamber B of switch 3 drops sharply, and switch 3 by spring 13 disconnects the line And the pressure from hydraulic rack 1.

При этом давление в магистрали 11 распора не изменяется, так как переключатель 3 выполнен с положительным перекрытием и имеет дроссель 10, который пропускает через себя малый расход. Кроме того, в случае, если нарушится герметичность гидравлической стойки 1 предохранительного 4 или разгрузочного клапана 5 настолько, что давление* в гидравлической стойке 1 падает несмотря на подпитку от магистрали 11 .At the same time, the pressure in the flow line 11 does not change, since the switch 3 is made with positive overlap and has a throttle 10, which passes a small flow rate through itself. In addition, if the tightness of the hydraulic rack 1 of the safety 4 or unloading valve 5 is impaired so that the pressure * in the hydraulic rack 1 drops despite recharge from the line 11.

84 распора через дроссель fO, то пере- . ключатель 3 изолирует магистраль II распора от потерявшей герметичность гидростойки, обеспечив тем самым номинальный распор остальных стоек.84 throttle through the inductor fO, then over-. switch 3 isolates the line II of the thrust from the hydrostatic column that has lost hermeticity, thereby ensuring the nominal distance of the remaining racks.

• При уменьшении давления в магистрали I I распора ниже, чем в стойке, последняя изолируется от магистрали 11 распора обратным клапаном 2.• When the pressure in the line I I of the thrust is reduced lower than in the rack, the latter is isolated from the line 11 of the thrust by the check valve 2.

Таким образом, предлагаемая секция ίο позволяет уменьшить время выведения стойки до номинального распора за счет ее предварительного распора вначале от насоса 9 большой производительности, а затем до распора номинальной 19 величины за счет нагнетания рабочей, жидкости насобом 12 высокого давления. Это значительна улучшает состояние Кровли и увеличивает надёжность работы гидравлической стойки в номиналь- 30 ном режиме' за счет восполнения микроутечек в гидравлической стойке. I насосом 12 высокого давления.Thus, the proposed section ίο allows you to reduce the time of withdrawal of the rack to a nominal expansion due to its preliminary expansion first from a high-capacity pump 9, and then to a nominal expansion of 19 by pumping a working fluid with a high-pressure pump 12. This significantly improves the condition of the Roof and increases the reliability of the hydraulic rack in the nominal 30 'mode due to the replenishment of micro-leaks in the hydraulic rack. I pump 12 high pressure.

Claims

This invention relates to the mining industry. The known mechanized lining section contains a hydraulic post with hydraulic locks, safety valves and an accumulator that accumulates the working fluid displaced from the rack and provides a slow output of the hydraulic circuit to the nominal resistance mode G0. The disadvantage of this lining is that it does not provide rapid removal of the rack to the nominal resistance, as a result of which, during the work cycle of the lining, the rack may not reach the operating mode, which reduces the efficiency of the roof maintenance. - Also known is the mechanized support section, which contains hydraulic rims whose piston cavities, through the safety valve, the safety valve of the overpressure block and the sectional distributor, are connected to the pump station and to the drainage main. The roof is supported / held hydraulically first by pre-thrusting, and then by lowering the roof and increasing the pressure of the working fluid in the piston cavity of the rack, which is locked by unloading and safety valves 2} This section of the mechanized support ensures quick removal of the rack to the nominal resistance mode and in case of micro leakage of fluid from the piston cavity, the carrying capacity of the rack drops sharply. The closest solution to the technical essence and the achieved result to the proposed is the mechanized support section containing hydraulics, the piston cavities are connected to safety, unloading valves and to the distributor, movement jacks, switches phcnopa n hydromagist1) aln | napor, drain, and gov. Hydrodynamic maintenance is carried out first by pre-thrusting from the common pumping station, then by increasing the pressure in the anti-sway, by lowering the roof, which is limited initially by the pressure relief valve, and by this pressure relief valve of nominal resistance 3j. This system also does not provide fast withdrawal of the rack to the mode of noniial resistance, and with significant leakage of fluid from the piston cavity of the rack, the carrying capacity of the rack falls. As a result, effective maintenance of blood is not ensured. The purpose of the invention is to accelerate the delivery of a hydraulic post to a nominal resistance and increase its reliability in this mode. The goal is achieved by the fact that the mechanized lining section is equipped with a check valve, throttle and high pressure pump, and the thrust switch has input, output and control chambers, while the control chamber of the switch and sub valve, the reversal valve chamber is connected to the piston cavity of the rack, and the valve valve the check valve is connected to the overflow chamber outlet chamber, through which the inlet chamber is connected by a hydraulic main with a high-pressure pump. The drawing shows a mechanized support section of a mechanized support section of a hydraulic stand 1, the piston cavities of which are connected through check valves 2 to output chambers A of switches 3, with control chambers B of these switches and to safety 4 and unloading 5 valves, which are sectional the valve 6 is connected by a pressure head 7 and a servo 8 to a pump station 9. The input chamber B switch 3. is connected via choke 1O and the hydraulic line II riser to the high pressure pump 12 . To regulate the magnitude of the operation of the switch 3 of the chute 3, it has a spring 13. The initial position, i.e. when the pressure of hydraulic pillars I and hydraulic lines is absent, switch 3 using a spring 13 adjusted to the pre-throttle value isolates the thrusting line II from the piston cavity of the hydraulic pillars 1. Hydraulic jack is moved to move the lining section and conveyor 14. For visual pressure control in the hydrostroke, the switch 3 may have a pressure indicator, the pin 15 of which is pressed by the spring 13 to the spool of the switch 3. The section operates as follows. The hydraulic strut I strut, usually performed after the support section is moved by the hydraulic jack 14, is made by connecting the hydraulic strut 1 of the piston cavity through the unloading valve 5, the pressure main 7 to the pump station 9 of high capacity. The hydraulic strut 1 is distributed to the value of the initial thrust. Since the switch 3 by the spring 13 is set to the value of the initial thrust, when the hydraulic strut I reaches this value in the piston cavity, the switch 3 under the action of the piston located in the control chamber B switches and connects between the cameras A and B. After this pump 12 is HIGH pressure, forcing consumers through the tI thrust line to the working fluid under pressure equal to or slightly lower than the pressure of the hydraulic strut 1, on which the safety valve 4 is set, through the I1 line throttle 10, switch 3 and check valve 2 inject the working fluid into the piston cavity of the hydraulic I-pillar to the nominal pressure. When removing the thrust from the hydraulic strut I, its piston cavity is connected through the unloading valve 5 to the drain, and the pressure in the piston cavity and the control chamber B of the switch 3 drops sharply, and the switch 3 by the spring 13 disconnects the trunk strut from the hydraulic strut. At the same time, the pressure in line II of the thrust does not change, since the switch 3 is made with a positive overlap and has a choke 10, which passes a small flow through it. In addition, in the event that the tightness of the hydraulic pillar 1 of the safety 4 or the unloading valve 5 is impaired so that the pressure in the hydraulic pillar I drops, despite pressure from the line I. thrust through GO, then re-. The switch 3 isolates the trunk I1 of the thrust from the leakage of the hydraulic post, thereby ensuring the nominal distance of the remaining struts. When the pressure is reduced, the throttle and throttle are lower than in the starch, the latter is isolated from the thrust line II by the check valve 2. Thus, the proposed section reduces the time it takes for the strut to reach the nominal thrust due to its pre-thrust and then until the nominal thrust is reached by pumping the working fluid at high pressure (12 high pressure). This significantly improves the condition of the roof and increases the reliability of the hydraulic strut in nominal mode. due to replenishment of micro leaks in the hydraulic rack I by a high-pressure pump 12. Claims section Mechanized support section containing hydroresistances, the piston cavities of which are connected to the safety relief valve 8 and to the distributor, movement jacks, expansion switches and hydraulic lines of discharge, drain and control of the fact that, in order to accelerate the output of the hydroresistance to the nominal resistance and increase the reliability of its operation in this process. i.e., it is equipped with a check valve, throttle and high pressure pump, and the switch of the switch has chambers of inlet, outlet and control, wherein the control chamber of the switch and sub valve valve of the non-return valve are connected to the piston rack cavity, and the valve valve of the check valve is connected to the outlet chamber a switch whose inlet chamber is connected via a throttle through a pressure main line to a high pressure pump. Sources of information taken into account in the examination 1. The author's certificate of the USSR A97409, cl. At 21 O 23/16, 1973.

2. Authors certificate of the USSR 24396, cl. B 21 O 23/00, 1969.

3. Authors certificate of USSR 176850i class. B 21 O 23/00, 1962 (prototype).

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