SU844882A1

SU844882A1 - Double-mode valve

Info

Publication number: SU844882A1
Application number: SU782684458A
Authority: SU
Inventors: Виктор Иванович Лиферов; Игорь Александрович Фоменко; Борис Данилович Оренбойм
Original assignee: за вители
Priority date: 1978-11-13
Filing date: 1978-11-13
Publication date: 1981-07-07

Description

(54) ДВУХРЕЖИМНЫЙ КЛАПАН(54) DOUBLE VALVE

Изобретение относится к гидро- и пневмоавтоматике.The invention relates to hydro and pneumatic automation.

' Известен двухрежимный клапан с упруго установленными и соосно расположенными запорными органами ос- ^!новного и дополнительного обратного клапанов, образующими в корпусе три полости, связанные с нагнетательной магистралью,· сливом и штоковой полостью гидроцилиндра, и установленным соосно запорному органу основного клапана полым плунжерным толкателем, внутренняя полость которого перекрыта дополнительным обратным (клапаном E1J.'Known dual-mode valve with elastically mounted and coaxially located locking bodies os- ^! new and additional non-return valves, which form three cavities in the body associated with the discharge line, · a drain and the rod cavity of the hydraulic cylinder, and a hollow plunger pusher installed coaxially to the shut-off element of the main valve, the internal cavity of which is blocked by an additional non-return valve (E1J valve.

Недостатком этого устройства являются его ограниченные функциональные возможности, обусловленные тем, что двухрежимный клапан не обеспечивает свободного доступа рабочей жидкости из напорной магистрали в што-.‘ ковуюполость гидроципиндра.The disadvantage of this device is its limited functionality, due to the fact that the dual-mode valve does not provide free access of the working fluid from the pressure line to the barrel. ‘Shaft cavity of the hydraulic cylinder.

Цель изобретения - расширение функциональных возможностей устройства.The purpose of the invention is the expansion of the functionality of the device.

Это достигается тем, что в корпусе между толкателем и запорным органом основного клапана установлена с возможностью ограниченного перемещения совместно с запорным органом основного клапана втулка, внутренняя полость которой сообщена каналом со штоковой полостью гидроцилиндра.This is achieved by the fact that in the housing between the pusher and the shut-off element of the main valve, a sleeve is installed with limited movement together with the shut-off element of the main valve, the inner cavity of which is connected by a channel with the rod cavity of the hydraulic cylinder.

На чертеже изображен двухрежимный клапан, общий вид.The drawing shows a dual-mode valve, General view.

В корпусе 1 клапана выполнено три полости: полость 2, связанная с нагнетательной магистралью или со сливом через полости распределителя 3 и с поршневой полостью цилиндра 4, полость 5, связанная с нагнетательной магистралью или со сливом также через распределитель 3, и полость 6, связанная со штоковой плостью цилиндра.Three cavities are made in the valve body 1: a cavity 2, connected to the discharge line or with a drain through the cavities of the distributor 3 and with a piston cavity of the cylinder 4, a cavity 5, connected to the discharge line or with the drain also through the distributor 3, and the cavity 6, connected with stock cavity of the cylinder.

В корпусе 1 установлена втулкаIn the housing 1 is installed sleeve

7, ход которой ограничивается ее буртом 8 и крышкой? 9. Во втулке 7 установлен полый плунжерный толкатель 10, внутрення полость II которого с одной стороны постоянно связана . полостью 12 втулки /, в свою очередь, постоянно связанной с по- . лостью 6 корпуса 1, а с другой - перекрыта дополнительным обратным клапаном 13, нагруженным пружиной 14. Ход толкателя 10 в сторону обратного клапана 13 ограничен упором 15.7, the course of which is limited to its shoulder 8 and the lid? 9. In the sleeve 7, a hollow plunger pusher 10 is installed, the inner cavity II of which is permanently connected on one side. cavity 12 of the sleeve /, in turn, is constantly associated with. cavity 6 of the housing 1, and on the other, it is blocked by an additional non-return valve 13 loaded with a spring 14. The stroke of the pusher 10 towards the non-return valve 13 is limited by a stop 15.

С противоположной стороны толка- . тель упирается в нагруженный пружиной 16 запорный орган 17 основного клапана, разделяющего полость 5 и полость 12 втулки 7.On the opposite side of the push. the body abuts against a spring-loaded shutter body 17 of the main valve separating the cavity 5 and the cavity 12 of the sleeve 7.

Двухрежимный: клапан работает следующим образом.Dual-mode: the valve operates as follows.

При нагнетании рабочей жидкости в поршневую полость цилиндра 4 слив из штоковой полости может осуществляться только через двухрежимный клапан. Но так как слив из штоковой полости перекрыт запорным органом 17 (полости 5 и 12 разобщены), в. цилиндре 4,Ькак в штоковой, так и в поршневой полостях, давление будет расти.When the working fluid is injected into the piston cavity of the cylinder 4, drainage from the rod cavity can be carried out only through a dual-mode valve. But since the drain from the rod cavity is blocked by the locking body 17 (cavities 5 and 12 are disconnected), c. cylinder 4, both in the rod and in the piston cavities, the pressure will increase.

Под действием(увеличивающегося давления в полости 2 клапана.втулка 7 (вместе с толкателем 10 и дополнительным обратным клапаном. 13) будет отжимать запорный орган 17 до тех пор, пока втулка 7 не упрется буртомUnder the action of (increasing pressure in the cavity 2 of the valve. Sleeve 7 (together with the pusher 10 and an additional non-return valve. 13) will press the locking body 17 until the sleeve 7 does not rest against the shoulder

8. в корпус 1 клапана.8. into the valve body 1.

Благодаря тому, что давление в штоковой полости растет быстрее, чем в поршневой (за счет разности площадей штоковой и поршневой полостей цилиндра), возникает разность давлений в полости 11 толкателя 10 и полости 2 клапана, которая будет отжимать дополнительный обратный клапан 13, и рабочая жидкость из штоковой полости перейдем в поршне вую, обеспечивая таким образом при небольших внешних сопротивлениях ускоренный режим работы цилиндра за счет дополнительной переточки жидкости из штоковой полости в поршневую. Когда же цилиндр встретит большое сопротивление, и давление в системе в результате этого возрастает^ до максимального, на которое отрегулирована гидросистема, а следовательно, и запорное устройство двухрежимногоDue to the fact that the pressure in the rod cavity increases faster than in the piston (due to the difference between the areas of the rod and piston cavities of the cylinder), a pressure difference arises in the cavity 11 of the pusher 10 and the cavity 2 of the valve, which will squeeze an additional non-return valve 13, and the working fluid we will pass from the rod cavity into the piston cavity, thus providing, at small external resistances, an accelerated mode of operation of the cylinder due to the additional transfer of fluid from the rod cavity to the piston cavity. When the cylinder encounters great resistance, and the pressure in the system as a result increases ^ to the maximum, to which the hydraulic system is adjusted, and consequently, the locking device of the dual-mode

844882 * 'клапана, то под действием этого давления шарик запорного устройства 17, сжимая пружину 16, отойдет от гнезда втулки 7 и соединит, таким образом, штоковую полость цилиндра со сливом через распределитель'.· Давление в полостях 5,6, 12 и 11 упадет. Вместе с тем, давление в полости 2 из-за высокого встречного сопротивления, действующего на шток цилиндра, будет более высоким,, и силой этого давления толкатель будет отжимать запорный орган 17, обеспечивая свободный без .·. сопротивления слив рабочей жидкости 15 из штоковой полости цилиндра, а скорость выдвижения штока цилиндра будет обусловлена только расходом ^; насосов гидросистемы.844882 * 'of the valve, then under the influence of this pressure the ball of the locking device 17, compressing the spring 16, moves away from the socket of the sleeve 7 and thus connects the cylinder stem cavity with the drain through the distributor'. · Pressure in the cavities 5,6, 12 and 11 will fall. At the same time, the pressure in the cavity 2 will be higher due to the high counter resistance acting on the cylinder rod, and the force of this pressure will push the locking member 17, providing free without. ·. resistance to discharge of the working fluid 15 from the rod cavity of the cylinder, and the speed of the extension of the cylinder rod will be determined only by the flow rate ^; hydraulic pumps.

При нагнетании рабочей жидкости в штоковую полость цилиндра 4 под действием давления втулка 7 переместится вниз до упора в крышку 9 и отойдет от запорного органа 17, а жидкость из полости 5 клапана будет беспрепятственно поступать в полости 12 и 6 и в штоковую полость цилиндра. При этом толкатель 10 прижмется к шарику дополнительного обратного клапана 13, прёпятсвуя доступу жидкости в поршневую полость цилиндра.When the working fluid is injected into the rod cavity of the cylinder 4 under pressure, the sleeve 7 will move down to the stop in the cover 9 and move away from the locking member 17, and the liquid from the valve cavity 5 will flow freely into the cavities 12 and 6 and into the rod cavity of the cylinder. In this case, the pusher 10 is pressed against the ball of the additional non-return valve 13, hindering the access of fluid to the piston cavity of the cylinder.

Технико-экономический эффект клапана достигается за счет осуществления повышенной производительности работы машин при небольших внешних сопротивлениях среды безотносительно к конструкции распределителя и схемы его внутренних каналов.The technical and economic effect of the valve is achieved through the implementation of increased productivity of the machines with small external resistance of the medium, regardless of the design of the distributor and the scheme of its internal channels.

Claims

The invention relates to hydraulic and pneumatic automation. A two-mode valve is known with elasticly installed and coaxially arranged shut-off bodies of the main and additional check valves, which form three cavities in the body, connected to the discharge line of the hydraulic cylinder, and mounted coaxially to the stop body This valve is a plunger pusher valve, the internal cavity of which is blocked by an additional check valve PZ. The disadvantage of this device is its limited functionality due to the fact that the dual-mode valve does not provide free access of the working fluid from the pressure line to the cylinder part of the hydraulic cylinder. The purpose of the invention is to expand the functionality of the device. This is achieved by the fact that in the housing between the pusher and the locking member of the main valve is installed with limited movement together with the locking member of the main valve, the sleeve, the internal cavity of which is connected by a channel with the rod cavity of the hydraulic cylinder. On the drawing e shows a dual-mode valve, a general view. Three cavities are made in the valve body 1: a cavity 2 connected to the discharge line or with a drain through the cavities of the distributor 3 and with a piston cavity of the cylinder 4, a cavity 5 connected to the discharge line or with a drain also through the distributor 3, and cavity 6, Associated with the rod stem of the cylinder. In the housing 1, a sleeve 7 is installed, the stroke of which is limited by its shoulder 8 and spacer 9. In the sleeve 7 there is a hollow plunger pusher 10, the cavity II of which is permanently connected to one side. the cavity 12 of the junction /, in turn, is permanently associated with the stump 6 of the housing 1, and on the other - overlap with an additional check valve 13 loaded with spring 1 The stroke of the pusher 10 towards the check valve 13 is limited by the stop 15. On the opposite side sense- The piston rests on the valve body 17 loaded with the spring 16, main cavity 17, section 5 and cavity 12 of the sleeve 7. Dual-mode: the valve operates as follows. When the working fluid is injected into the piston cavity of the hoistindra 4, drainage from the rod end can be carried out only through a dual-mode valve. But since the drainage from the rod cavity is blocked by the locking member 17 (cavities 5 and 12 are separated, in the cylinder 4, both in the rod and in the piston cavities, the pressure will increase. Under the effect of increasing pressure in the cavity 2 valve.plug 7 ( together with the pusher 10 and the additional check valve. 13) press the shut-off body 17 until the sleeve 7 resists the burto 8. into the valve body 1. Due to the fact that the pressure in the rod cavity grows faster than in 1 day (for an account of the difference between the piston rod and piston cavity of the cylinder, occurs The pressures in the cavity I1 of the pusher 10 and the cavity 2 of the valve are pressed to press the additional check valve 13, and the working fluid from the rod cavity will pass into the piston, thus ensuring, with small external resistances, accelerated operation of the cylinder p-working from the rod cavity to the piston one. When the cylinder encounters great resistance, the pressure in the system as a result of this increases to the maximum that the hydraulic system is adjusted to, and therefore the locking device bimodal valve 2, under the action of this pressure ball locking device 17, compressing the spring 16, moves away from the socket the sleeve 7 and connects thereby the stem of the cylinder chamber with a drain via raspredesh1tel. The pressure in the cavity x 5.6, 12 and 11 will fall. At the same time, the pressure in cavity 2, due to the high counter-resistance acting on the cylinder rod, will be higher, and the force of this pressure will push the locking member 17, providing free pressure. resistance to draining the working fluid from the rod end of the cylinder, and the speed of the cylinder rod extension will be determined only by the flow rate of the hydraulic system pumps. When the working fluid is injected into the rod cavity of the cylinder 4 under the action of pressure, the sleeve 7 will move downwards against the stop into the cylinder 9 and move away from the locking member 17, and the fluid from the valve cavity 5 will freely flow into the cavities 12 and 6 and into the cylinder rod cavity. In this case, the pusher 10 is pressed to the ball-additional non-return valve 13, preventing access to the fluid in the piston cavity of the cylinder. The technical and economic effect of the valve is achieved due to the increased productivity of the machines with low external resistances of the medium, regardless of the design of the distributor and the design of its internal channels. Claims of the invention A dual-mode valve with elastically installed and coaxially arranged shut-off elements of the main and additional check valves that form three cavities in the body, connected to the discharge line, the drain and the rod of the hydraulic cylinder, and the hollow plunger pusher mounted coaxially to the locking organ of the main valve. which is blocked by an additional check valve, characterized in that, in order to expand the functional possibilities of the device, in the housing