SU956083A1

SU956083A1 - Apparatus for feeding lubricant

Info

Publication number: SU956083A1
Application number: SU803241184A
Authority: SU
Inventors: Алексей Иванович Добронравов; Виталий Федорович Челенко; Владимир Михайлович Анфалов; Олег Яковлевич Куфтин; Николай Петрович Нетесов; Валерий Федорович Пивоваров; Александр Федорович Килиевич; Леонид Григорьевич Тубольцев
Original assignee: Институт черной металлургии; Магнитогорский металлургический комбинат
Priority date: 1980-12-11
Filing date: 1980-12-11
Publication date: 1982-09-07

Description

Изобретение относится к области 1 прокатного производства, а конкретно к устройствам подачи смазки на валки станов горячей прокатки, и совершенствует конструкцию системы подачи технологической смазки. ⁵ The invention relates to field 1 of rolling production, and in particular to devices for supplying lubricant to the rolls of hot rolling mills, and improves the design of the technological lubricant supply system. ⁵

При горячей прокатке валки работают в тяжелых условиях при высоких давлениях и температурах. Улучшить условия работы валков можно применением технологической смазки.During hot rolling, the rolls work in difficult conditions at high pressures and temperatures. It is possible to improve the working conditions of the rolls using technological lubricant.

Опыт эксплуатации систем смазки на станах горячей прокатки показал, что наиболее приемлемой следует считать смазку для поверхности валков ₁₅в виде водомасляной смеси, приготовление которой производят различными способами и используют различные устройства для нанесения смазки на валки [1]. 20Experience in operating lubrication systems in hot rolling mills has shown that lubricant for the surface of the rolls ₁₅ in the form of a water-oil mixture should be considered the most acceptable, the preparation of which is carried out in various ways and using various devices for applying lubricant to the rolls [1]. 20

Наиболее близким по технической сущности и достигаемому результату являются устройство подачи технологической смазки, содержит магистра2 ли подачи масла и воды под давлением, насос подачи смеси, закольцованную питающую и напорную магистрали с отсчетным клапаном с включающим и отключающими соленоидами, магистрали подачи смеси к форсункам с отсечными клапанами с включающими и отключающими соленоидами, регулятор давления и смесители t23.The closest in technical essence and the achieved result are a technological lubricant supply device, contains a supply line 2 for oil and water supply under pressure, a mixture supply pump, a looped supply and pressure line with a check valve with on and off solenoids, a mixture supply line to nozzles with shut-off valves with on and off solenoids, pressure regulator and t23 mixers.

Известное устройство в качестве технологической смазки использует водомасляную смесь. При прекращении перемешивания водомасляная смесь расслаивается в течение 510 с. Поэтому известное устройство работает в режиме постоянного перемешивания технологической смазки в закольцованной магистрали для поддержания ее в дисперсном состоянии. В магистралях подвода смазки от закольцованной магистрали к форсункам нанесения на валки расслоения смазки во время ее движения также не происходит.The known device as a process lubricant uses a water-oil mixture. Upon termination of mixing, the water-oil mixture exfoliates for 510 s. Therefore, the known device operates in the mode of constant mixing of technological lubricant in the looped line to maintain it in a dispersed state. In the lines for supplying lubricant from the looped line to the nozzles for applying grease separation to the rolls during its movement, also does not occur.

Опыт эксплуатации известного устройства показал, что сердечник включающего и отключающего соленоидов (золотник клапана) от-, сечного клапана иногда заедает по механическим причинам и соленоид не может его передвинуть в другое положение. Это приводит к тому, что автоматика подает кратковременно напряжение на соленоид, а он не втягивает сердечник и не перекрывает или не открывает подачу смазки на форсунку. Неоткрытие клапана вызовет нарушение стабильной работы непрерывной чистовой группы клетей стана, но полоса не пробуксует в момент захвата валками, так на валках не будет смазки.The operating experience of the known device showed that the core of the on and off solenoids (valve spool) of the off-section valve sometimes sticks for mechanical reasons and the solenoid cannot move it to another position. This leads to the fact that the automation supplies a short-term voltage to the solenoid, but it does not retract the core and does not block or open the lubricant supply to the nozzle. Non-opening of the valve will cause a violation of the stable operation of the continuous finishing group of the mill stands, but the strip will not slip at the moment of capture by the rolls, so there will be no lubrication on the rolls.

Гораздо опаснее незакрцтие клапана во время выхода заднего конца полосы из валков. Смазка будет поступать на валки и после выхода полосы из валков. Следующая полоса соприкоснется с промасленными поверхностями валков и захвата не произойдет. На ликвидацию последствий незахвата полосы в непрерывной группе клетей затрачивают 1-1,5 ч, что для высокопроизводительного широкополосного стана оборачивается потерей до 1000 т проката, В случае захвата полосы промас~₃₀ленными валками происходит пробуксовка полосы в валках, что приводит к скручиванию шеек валков из-за чрезмерных ударных нагрузок на привод валков. Поломка валков тоже дорого обходится цеху.Non-closure of the valve is much more dangerous when the rear end of the strip exits the rolls. Lubrication will also flow to the rolls after the strip leaves the rolls. The next strip will come in contact with the oiled surfaces of the rolls and capture will not occur. To eliminate the effects nezahvata continuous strip mill section spend 1-1.5 h, which for high-performance broadband mill turns loss to 1000 m rolled This swath promas ~ ₃₀ lennymi rollers slippage occurs strips in rolls, resulting in twisting of the necks of the rolls due to excessive shock loads on the roll drive. Breakage of rolls is also expensive for the workshop.

Таким образом, известная существующая работа отсечных клапанов с включающими и отключающими соленоидами понижает надежность работы устройства подачи технологической смазки.Thus, the known existing operation of shut-off valves with on and off solenoids reduces the reliability of the process lubricant supply device.

Целью изобретения является повышение надежности работы устройства путем предотвращения пробуксовки в валках.The aim of the invention is to increase the reliability of the device by preventing slippage in the rolls.

Цель достигается тем, что в ройстве подачи технологической ки, содержащем магистраль Модачи масла и воды под давлением насоса подачи смеси,закольцованную питающую и напорную магистрали с отсечным клапаном с включающим и отключающим соленоидами, магистрали подачи смеси к форсункам с отсечными клапанами с включающими и отключающими соленоидами, регулятор давления, в -цепи отключающих соленоидов отсечных клапанов последовательно с катушками соленоидов установлены токовые реле.The goal is achieved by the fact that in the technological flow supply containing the Modaci oil and water line under pressure of the mixture supply pump, the looped supply and pressure lines with a shut-off valve with on and off solenoids, the mixture supply lines to nozzles with shut-off valves with and without shut-off solenoids , a pressure regulator, current relays are installed in series with the solenoid shut-off valves in the circuit of the shut-off solenoids.

На фиг. 1 изображена общая схема предлагаемого устройства; на фиг. 2 схема включения и выключения соленоидов клетей широкопрлосного стана; на фиг. 3 - электрическая схема ра- боты.In FIG. 1 shows a General diagram of the proposed device; in FIG. 2 scheme for switching on and off the solenoids of stands of a wide-plane mill; in FIG. 3 - electrical diagram of the work.

Предлагаемое устройство включает магистрали подачи смеси 1 и воды 2 под давлением. В магистралях установлены регуляторы давления соответственно 3 и 4 и обратные клапаны 5 и 6. Магистрали 1 и 2 соединены питающей магистралью 7 с насосом 8 подачи смеси. Напорная магистраль 9 насоса смеси закольцована с его питающей магистралью, через регулятор давления 10. Магистрали 11 форсунок 12 подачи смеси на валки с отсечными клапанами 13 с включающими и отключающими соленоидами соединены с закольцованной магистралью насоса между выходом насоса и регулятором давления' 10 смеси.The proposed device includes a line supplying a mixture of 1 and water 2 under pressure. Pressure regulators 3 and 4 and non-return valves 5 and 6 are installed in the lines, respectively. Line 1 and 2 are connected by a supply line 7 to a mixture supply pump 8. The pressure line 9 of the mixture pump is looped with its supply line through the pressure regulator 10. The lines 11 of the nozzles 12 for supplying the mixture to the rolls with shut-off valves 13 with on and off solenoids are connected to the looped line of the pump between the pump output and the mixture pressure regulator '10.

Устройство оборудовано отсечным клапаном 14 с включающим и отключающим соленоидами, установленным в напорной магистрали перед магистралью форсунки, а также обратным клапаном 15, установленным в кольцевой магистрали между регулятором давления 10 и магистралями 1 и 2. В питающей и напорной магистралях установлены смесители соответственно 16 и 17, соединенные через обратные клапаны 18 и 19 с магистралью пара 20.The device is equipped with a shut-off valve 14 with on and off solenoids installed in the pressure line in front of the nozzle line, as well as a check valve 15 installed in the annular line between the pressure regulator 10 and lines 1 and 2. In the supply and pressure lines, mixers 16 and 17 are installed connected through check valves 18 and 19 to the steam line 20.

Предлагаемое устройство работает следующим образом.The proposed device operates as follows.

Магистрали 1 и 2 подают масло и воду давлением, например ление регулируют и поддерживают постоянным для масла и воды соответственно регуляторами 3 и 4. Когда отсечной клапан 13 закрыт, масло и вода поступают в магистраль 7 до тех пор, пока полностью ее не заполнят. Насос 8 включают и он работает непрерывно. Давление в напорной магистрали задают регулятором давления 10. Смесь ' масла с водой непрерывно циркулирует по закольцованной магистрали. При открытом отсечном клапане 13 смазка подается на валки и при этом давление в магистрали 7 падает. Происходит подпитка масла и воды из магистралей 1 и 2 в магистраль 7. Количество вновь поступающих компонентов соответствует количеству израсходованной форсунками смазки.Lines 1 and 2 supply oil and water with pressure, for example, the flow is regulated and kept constant for oil and water by regulators 3 and 4., respectively. When the shut-off valve 13 is closed, oil and water enter the line 7 until it is completely filled. Pump 8 is turned on and it runs continuously. The pressure in the pressure line is set by a pressure regulator 10. A mixture of oil and water is continuously circulated along the looped line. With the shut-off valve 13 open, lubricant is supplied to the rolls and the pressure in the line 7 drops. Oil and water are fed from lines 1 and 2 to line 7. The number of newly supplied components corresponds to the amount of grease used by the nozzles.

в магистраль 7 под одинаковым атм. Это давПОЛОСЫ устсмаз45to highway 7 under the same atm. This is a Lane Ustmazm45

956083 6956083 6

По магистрали 20 подают пар в ’полосы либо не захватится валками, смеситель 16 под давлением не ниже ' давления в -подпитывающих магистралях 1 и 2, т. е. не ниже 2 атм. Равномерно подогретая по всему объему водо- 5 масляная смесь циркулирует по закольцованной магистрали под давлением, поддерживаемым регулятором давленияOn line 20 steam is supplied to the ’strips or it won’t be captured by the rolls, the mixer 16 under pressure not lower than the pressure in the supply lines 1 and 2, i.e., not lower than 2 atm. Evenly heated throughout the entire volume of the water-5 oil mixture circulates along the looped line under pressure supported by a pressure regulator

10. При необходимости дополнительного подогрева смеси подают пар в смеси-¹⁰тель 17·10. If necessary, additional heating of the mixture serves steam in the mixer ¹⁰ 17 ·

Рассмотрим работу отсечных клапанов 13 и 14 устройства подачи технологической смазки. В качестве примера возьмем 6-ю клеть стана (вторую ¹⁵клеть непрерывной чистовой группы).Consider the operation of shut-off valves 13 and 14 of the technological lubricant supply device. As an example, take the 6th mill stand (the second ¹⁵ mill stands of a continuous finishing group).

При заходе головы полосы в 5~ю клеть включаются реле РП5 (см. фиг. 2)· через датчик наличия металла из схемы САРТ и размыкает нормально замкну-20 тый контакт в цепи соленоида отключения смазки СОб.When the head of the strip enters the 5th stand, the RP5 relay is turned on (see Fig. 2) · through the metal presence sensor from the CAPT circuit and opens a normally closed contact in the solenoid circuit of the CO lubrication shutdown.

, При заходе головы полосы в 6-ю клеть включается реле РПб и через его нормально открытый контакт и нор-25 мально закрытый контакт реле РП7 включается соленоид СВб отсечного клапана 13 и подает смазку через отсечной клапан на валки., When the head of the strip enters the 6th stand, the RPb relay is turned on and through its normally open contact and the normally closed 25th contact of the RP7 relay, the solenoid SVb of the shut-off valve 13 is turned on and supplies lubricant to the rolls through the shut-off valve.

При заходе головы полосы в 7^_ю 30 клеть включается реле РП7 и своим нормально замкнутым контактом снимает напряжение с соленоида СВб, чтобы катушка соленоида не была все время под напряжением. Смазка при этом продолжает подаваться на валки.When entering the strip head in the 7 th ^_ 30 stand is included FP7 relay and its normally closed contact relieves stress from the solenoid SRB to the solenoid coil was not all the time under tension. The lubricant continues to be supplied to the rolls.

При выходе хвоста полосы из 5й клети отключается реле РП5 и своим нормально замкнутым контактом включается соленоид СОб, тем самым прекра- ₄₀щая подачу смазки на валки. И пока хвост полосы дойдет до 6-й клети, < смазка должна выгореть с рабочих поверхностей валков для исключения пробуксовки следующей полосы в валках при захвате.Upon exiting the tail strip of the 5th stand is disconnected FP5 relay and its normally closed contact is switched solenoid GSS, thereby Cessation ₄₀ schaya supply of lubricant to the rollers. And until the tail of the strip reaches the 6th stand, <the lubricant should burn out from the working surfaces of the rolls to prevent slipping of the next strip in the rolls during capture.

При выходе хвоста полосы из 6-й клети отключается реле РПб и своим нормально открытым контактом снимает напряжение с катушки соленоида СОб.When the tail of the strip exits the 6th stand, the RPb relay is turned off and with its normally open contact relieves the voltage from the COb solenoid coil.

При выходе хвоста полосы из 7~й клети отключается реле РП7 и своим нормально замкнутым контактом подготавливает цепь для включения соленоида СВб на следующей полосе.When the tail of the strip exits the 7th stand, the relay RP7 is turned off and prepares a circuit with its normally closed contact to turn on the SVB solenoid in the next strip.

При механических заданиях соленоида отсечного клапана 13, отключающего смазку, на валки продолжает поступать смазка и голова следующей [либо захватится и начнется пробуксовка полосы в промасленных валках. Это приведет к длительному простою или иногда вызовет поломку валков. Чтобы исключить такой режим работы устройства, последовательно с катушкой отключающего соленоида отсечного клапана 13 ставят токовое реле.During mechanical tasks of the solenoid of the shut-off valve 13, which turns off the lubrication, lubrication continues to flow to the rolls and the head of the next one [or gets caught and the strip starts slipping in the oiled rolls. This will lead to prolonged downtime or sometimes cause breakage of the rolls. To exclude this mode of operation of the device, a current relay is placed in series with the coil of the shut-off valve solenoid 13.

Токовое реле будет контролировать силу тока отключающего соленоида отсечного клапана 13. При нормальном втягивании сердечника катушка соленоида потребляет ток до 1А. При заедании сердечника и невтягивании его ток катушки соленоида достигает 10А. В предлагаемом устройстве токовое реле настраивается на ток втягивания 2-10А.The current relay will control the current strength of the shut-off valve shut-off solenoid 13. During normal core retraction, the solenoid coil draws current up to 1A. When the core seizes and its core is not retracted, the current of the solenoid coil reaches 10A. In the proposed device, the current relay is configured for a retraction current of 2-10A.

При втягивании (срабатывании) токовое реле РТ, соответствующее своей клети, своим нормально замкнутым контактом рвет цепь катушки реле РВ, тоже соответствующей своей клети. Реле РВ, отпадая с выдержкой времени, необходимой для включения отключающего смазку соленоида своим нормально замкнутым контактом включит свой аварийный соленоид, который перекроет смаз⁴ку в другом месте’(отсечным клапаном 14).When retracting (tripping), the current relay PT, corresponding to its stand, breaks the circuit of the relay coil РВ, also corresponding to its stand, with its normally closed contact. Relay RV, falling off with the time delay necessary to turn on the solenoid disconnecting the lubricant with its normally closed contact, will turn on its emergency solenoid, which will shut off the lubrication ⁴ ku elsewhere '(shut-off valve 14).

Если отключающий смазку соленоид срабатывает нормально, то реле времени не успевает отпасть, как схема его подпитки восстанавливается. РТ при втягивании соленоида отпадает и своим нормально замкнутым контактом восстанавливает цепь реле*РВ.If the solenoid disconnecting the lubricant works normally, then the time relay does not have time to fall off, as its feeding circuit is restored. When retracting the solenoid, the PT disappears and restores the relay circuit * РВ with its normally closed contact.

В схеме включения и отключения соленоидов отсечных клапанов предлагаемого устройства подачи технологической смазки на валки стана 2500 горячей прокатки ММК опробованы соленоиды МИС 5Ю0 для СВ5 + 7, СА05 + 7, реле РЭВ 815 для РП5 + 7, реле РЭВ 816 для РВ5 + 7к реле РТ-40/6У4 для РТ5 + 7 клетей.In the circuit for switching on and off the shut-off valve solenoids of the proposed technological lubricant supply device to the rolls of the MMK hot rolling mill 2500, MIS 5Y0 solenoids for CB5 + 7, CA05 + 7, REV 815 relay for RP5 + 7, and REV 816 relay for PB5 + 7k relay RT were tested -40 / 6U4 for PT5 + 7 stands.

Экономическая эффективность от внедрения предлагаемого устройства достигается за счет исключения поломок валков и простоев стана при остановке полосы в непрерывной чистовой группе клетей. Годовые потери по этим причинам составляют 20-25 тыс. руб.Economic efficiency from the introduction of the proposed device is achieved by eliminating breakdowns of rolls and downtimes of the mill when the strip stops in a continuous finishing group of stands. Annual losses for these reasons amount to 20-25 thousand rubles.

Применение предлагаемого устройства позволит исключить эти потери и получить дополнительно экономический эффект в 20-25 тыс. руб. дляThe use of the proposed device will eliminate these losses and get an additional economic effect of 20-25 thousand rubles. for

Ί одного широкополосного стана горячей прокатки.Ί one broadband hot rolling mill.

Claims

The invention relates to the field of rolling production, and specifically to lubricant supply devices for hot rolling mill rolls, and improves the design of the lubricant supply system. During hot rolling, the rolls operate under severe conditions at high pressures and temperatures. To improve the working conditions of the rolls, you can use technological grease. The experience of operating lubrication systems at hot rolling mills showed that the most acceptable should be considered to be the lubricant for the surface of the rolls in the form of an oil-water mixture, the preparation of which is carried out in various ways and use various devices for applying lubricants to the SP rolls. The closest in technical essence and the achieved result is a process lubrication supply device, contains oil and water supply lines under pressure, a mixture supply pump, a looped supply and pressure lines with a reading valve with on and off solenoids, a mixture supply line to nozzles with shut-off valves with on and off solenoids, pressure regulator and mixers t23. The known device uses a water-oil mixture as a technological lubricant. When the mixing of water and oil is stopped, the mixture is exfoliated for 5-10 seconds. Therefore, the known device operates in the continuous mixing mode of the process lubricant in a looped line to maintain it in a dispersed state. In the lubricant supply lines, from the loopback line to the nozzles, the lubrication of the lubricant during the movement of the lubricant does not occur. The operating experience of the known device has shown that the core of the closing and disconnecting solenrides (valve spool) of the shut-off valve sometimes sticks for mechanical reasons and the solenoid cannot move it to another position. This leads to the fact that the automatics applies a short-term voltage to the solenoid, but it does not draw in the core and does not shut off or open the lubricant supply to the nozzle. Non-opening of the valve will cause a violation of the stable operation of the continuous finishing group of the mill stands, but the strip does not slip at the time of the rolls capture, so there will be no lubrication on the rolls. It is much more dangerous to close the valve when the rear end of the strip leaves the rolls. Lubrication will be applied to the rolls even after the strip leaves the rolls. The next contacting zone with the oiled surfaces of the rolls and the gripping will not occur. In order to eliminate the consequences of non-catching, the bands in a continuous group of stands cost 1-1.5 hours, which for a high-performance broadband mill results in a loss of up to 1000 tons of rolled metal. In the case of the capture of a strip of npoMac rolls, slippage of the strip in the rolls occurs, which causes the rolls to twist due to excessive shock loads on the roll drive. Breakage of the rolls is also costly for the workshop. Thus, it is known that the operation of shut-off valves with switched on and off solenoids is known reduces the reliability of the lubricant supply device. The aim of the invention is to increase the reliability of the device by preventing slipping of the strips in the rolls. The goal is achieved by the fact that in the process lubricant supply device containing a supply line of oil and water under pressure of the mixture supply pump, a looped supply and pressure line with a shut-off valve with on and off solenoids, a mixture supply line to the injectors with shut-off valves with on and off solenoids, pressure regulator, current relays are installed in -chains of shut-off valves shut off solenoids in series with solenoid coils. 95 4 FIG. 1 shows the general scheme of the proposed device; in fig. 2 diagram of switching on and switching off the solenoids of the stands of the wide-strip mill; in fig. 3 - electrical circuit operation: bots. The proposed device includes a line supplying a mixture of 1 and water 2 under pressure. In the lines, pressure regulators are installed, respectively, 3 and i, and check valves 5 and 6. Highways 1 and 2 are connected by a supply line 7 to the mixture feed pump 8. The delivery line 9 of the mixture pump is looped to its supply line through the pressure regulator 10. The lines 11 of the nozzles 12 supplying the mixture to the rolls with shut-off valves 13 with switching on and off solenoids are connected to the ring-shaped line of the pump between the pump outlet and the pressure regulator 10 of the mixture. The device is equipped with a shut-off valve 1 with on and off solenoids installed in the pressure line in front of the injector line, as well as a check valve 15 installed in the ring line between pressure regulator 10 And line 1 and

2. Mixers 16 and 17, respectively, are installed in the supply and pressure lines, connected through non-return valves 18 and 19 to the steam line 20. The proposed device works as follows. Highways 1 and 2 in line 7 supply oil and water under the same pressure, for example 2 atm. This pressure is regulated and kept constant for oil and water, respectively, by regulators 3 and 4. When the shut-off valve 13 is closed, oil and water flow into line 7 until it is completely filled. Pump 8 is turned on and it runs continuously. The pressure in the pressure line is set by the pressure regulator 10. A mixture of oil and water is continuously circulated along a looped line. When the shut-off valve 13 is open, the lubricant is applied to the rolls and the pressure in line 7 drops. The oil and water are fed from lines 1 and 2 to line 7. The number of newly arriving components corresponds to the amount of lubricant consumed by the nozzles. The line 20 supplies steam to the mixer 16 at a pressure not lower than the pressure of the in-feed lines x 1 and 2, i.e. not less than 2 atm. Evenly heated throughout the volume of water-oil to the mixture circulates through a round pipe under pressure maintained by pressure regulator 10. If necessary, additional heating of the mixture, steam is supplied to the mixer 17. Consider the operation of the shut-off valves 13 and H of the process lubricant supply. As an example, take the 6th grade of the mill (the second stand of the continuous finishing group). When the head enters the 5th cage, the FP5 relay is turned on (see Fig. Through the metal presence sensor from the CAPT circuit) and the normally closed contact in the solenoid circuit of the Sub switch is opened. When the head enters the 6th, the RPB turns on and through its normally open contact and normally closed contact of the FP7 relay the solenoid SVB of the shut-off valve 13 is turned on and delivers lubricant through the shut-off valve to the rolls. When the head of the strip enters the 7th stand, the FP7 relay turns on and relieves the voltage from its normally closed contact Solenoid SVB, Thu so that the coil of the solenoid is not under voltage all the time. The lubricant continues to be supplied to the rolls. When the tail of the strip leaves the 5th stand, the RP5 relay is turned off and the solenoid COb is turned on by its normally closed contact, thereby stopping the supply of lubricant to the rolls. while the tail of the strip reaches the 6th stand, the lubricant should burn out from the working surfaces of the rolls in order to prevent the next strip from slipping in the rolls during gripping. When the tail of the strip leaves the 6th stand, the RPB relay is disconnected and relieves the voltage with its normally open contact GSS solenoid coil. When the tail of the strip leaves the 7th stand, the FP7 relay is turned off and, with its normally closed contact, prepares a circuit for switching on the solenoid CBb in the next strip. With the mechanical tasks of the solenoid valve 13 shutting off the lubricant, the rolls continue to receive lubrication and the head of the next 36 strip will either not get caught by the rolls, or the slip will start and the strip will start to slip in the oiled rolls. This will lead to prolonged downtime or sometimes breaks in the rolls. To exclude such a mode of operation of the device, a current relay is installed in series with the coil of the shut-off solenoid shut-off valve 13. The current relay will control the current strength of the shut-off solenoid of the shut-off valve 13. During normal retraction of the core, the solenoid coil consumes current up to 1A. When a core is jammed and not wired, its current of the solenoid coil reaches 10A. In the proposed device, the current relay is tuned to the inrush current 2-10A. When the PT relay, which corresponds to its stand, is pulled in (triggered), it breaks the circuit of the PB coil with its normally closed contact, also corresponding to its stand. An RV relay, a delay with a time delay necessary to turn on the solenoid disconnecting lubricant with its normally closed contact, will turn on its emergency solenoid, which will block the lubricant elsewhere (shut-off valve I). If the lubricating solenoid tripping function is normal, the time relay does not have time to disappear, as its charging circuit is restored. When the solenoid is pulled in, RT disappears and, by its normal contact with a closed contact, restores the RV relay circuit. The MIC 5100 solenoids for CB5 + 7, SA05 + 7, relay REV 815 for RP5 7, ReV 816 for RT5 + li PT relay are tested in the circuit for switching on and off the solenoids of the shut-off valves of the proposed lubricant supply device to the rolls of the hot rolling mill mill 2500. -1 0 / 6У4 for РТ5 + 7 stands. The economic efficiency of introducing the proposed device is achieved by eliminating breakage of the rolls and mill downtime when the strip stops in the continuous finishing group of the stands. The annual losses for these reasons are 20-25 thousand rubles. The application of the proposed device will allow to eliminate these losses and to obtain an additional economic effect of 8 20-25 thousand rubles. for one wideband hot rolling mill. Claims of the invention: Process lubricant supply device, consisting of oil and water pressure lines, mixture supply flow, looped supply and pressure lines with a check valve with on and off solenoids, mixture supply lines to cut-off I HJildMr GC ./h JI supply lines. , .- .h ---, valves with on and off switchffffff

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