SU611066A1

SU611066A1 - Closing device

Info

Publication number: SU611066A1
Application number: SU762352172A
Authority: SU
Inventors: Владимир Самойлович Немиров
Original assignee: Харьковский Ордена Ленина Турбинный Завод Имени С.М.Кирова
Priority date: 1976-04-29
Filing date: 1976-04-29
Publication date: 1978-06-15

Description

1one

Изобретение относитс к арматурострое- нию и может быть использовано в качестве отсечного или регулирующего высокого или низкого давлени дл паровых турбин большой мощности.5The invention relates to a valve and can be used as a shut-off or regulating high or low pressure for high-power steam turbines.5

Известны запорные устройства с разгруженным штоком привода l .Known locking devices with unloaded rod drive l.

Известно запорное устройство, в котором разгрузка штока привода осуществл етс с помощью двухстороннего разгрузочного ю клапана, устанавливаемого в разгрузочной камере, выполненной в запорном органе устройства 2 .A locking device is known in which the actuator stem is unloaded using a two-way unloading valve installed in the unloading chamber made in the locking member of device 2.

Цель изобретени - более полна разгрузка штока привода, в частности разгрузка, от 15 усилий, определ емых массой запорного органа и трением между ним и корпусом устройства .The purpose of the invention is more complete unloading of the actuator stem, in particular, unloading, from 15 forces determined by the mass of the locking member and friction between it and the device body.

Это достигаетс тем, что устройство снабжено вторым разгрузочным клапаном, грузочна камера разделена перегородкой с двухсторонним седлом, перекрываемым поочередно одним из разгрузочных клапанов. Каналы, сообшаюшие разгрузочную камеру с выходным патрубком, выполнены в штоке, а 25This is achieved by the fact that the device is equipped with a second discharge valve, the load compartment is divided by a partition with a two-way seat, which is alternately shut off by one of the relief valves. The channels, the unloading chamber with the outlet nozzle, are made in the rod, and 25

каналы, сообщающие разгрузочную камеру с входным патрубком, выполнены в виде встроенных в камеру сопел.the channels informing the unloading chamber with the inlet nozzle are made in the form of nozzles embedded in the chamber.

На чертеже схематически изобреокено предлагаемое устройство.In the drawing, the proposed device is schematically invented.

Внутри корпуса 1 с крышкой 2, входным 3 и выходным 4 патрубками, седлом 5 и направл ющими 6 и 7 размещен запорный орган 8 со штоком 9 привода. Жестко св занный с запорным органом цилиндр 1О образует разгрузочную камеру, разделенную пе 5егородкой 11с двухсторонним седлом 1Й на две полости 13 и 14, в которых размещены двухсторонние разгрузочные клапаны 15 и 16, жестко св занные со штоком 9 привода.Inside the housing 1 with a lid 2, an inlet 3 and an outlet 4, nozzles, a saddle 5 and guides 6 and 7, a locking member 8 with a rod 9 of the actuator is placed. Cylinder 1O, which is rigidly connected to the shut-off member, forms a discharge chamber, divided by a double-sided 11c double-sided saddle 1J into two cavities 13 and 14, in which double-sided unloading valves 15 and 16 are housed, rigidly connected to the actuator stem 9.

В цилиндр 10 встроены сопла 17 в 18, сообщающие полости 13 14 разгрузочной камеры с входным патрубком 3.Into the cylinder 10, nozzles 17 are embedded in 18, communicating the cavities 13 14 of the discharge chamber with the inlet nozzle 3.

С выходным патрубком 4 разгрузочна камера сообщаетс с помошыо продольного 19 и поперечных каналов 2О выпопненны С в штоке 9,With the outlet nozzle 4, the discharge chamber communicates with the help of the longitudinal 19 and transverse channels 2O of the unloaded chamber C in the rod 9,

Claims

The device works as follows. In the closed position of the locking body 8, the unloading valve 15 under pressure from the rod 9 sits on the double-sided seat 12 of the partition 11, and the valve 16 blocks the outlet openings of the nozzles 18. The cavity 13 of the discharge chamber communicates with the inlet nozzle 17 and the cavity 14 through the channels 19 and 2O in the rod 9 - with the outlet nozzle 4. The pressure differential acting on the partition 11, presses the locking body 8 to the saddle 5, providing the necessary seal. When the rod 9 moves upwards, the discharge valve 16 moves away from the nozzles 18 and approaches the saddle 12, and the discharge valve 15 moves away from the saddle 12 and approaches the nozzles 17i. The pressure of the working medium in the cavity 14 increases and in the cavity 13 decreases. When a certain position of the rod 9 when the partition 11 there is a force directed upwards. With further rise of the rod 9, this force increases and overcomes the action of the forces holding the locking organ 8 in the closed position. The latter starts to rise, opening the flow area of the saddle 5. Thus, when the rod 9 moves upwards to open or downwardly, the porous body 8 tracks its movement without transferring efforts to it. Claim 1. The locking device, in the case of which a shut-off element is installed, equipped with a discharge chamber with channels that connect it with the inlet and outlet nozzles, and with a two-way unloading valve placed in it, rigidly fixed to the drive shaft, characterized in that the purpose of a more complete discharge of the rod, the device is equipped with an additional two-way unloading valve rigidly mounted on the rod, and in the discharge chamber there is a partition with a two-sided saddle. 2. The device according to claim 1, that is, so that the channels communicating the unloading chamber with the outlet nozzle are made in the rod, and the channels informing the unloading chamber with the inlet nozzle are made in the form of nozzles Sources of information taken into account in the examination: 1.US Patent NO 382О754, cl. 251-38, 1974.

2. US patent number 36O1157, class. 137-630.14,1971.