SU996784A1

SU996784A1 - Poppet valve gate

Info

Publication number: SU996784A1
Application number: SU813288173A
Authority: SU
Inventors: Эдгар Залманович Гуревич
Original assignee: Московское Головное Специализированное Предприятие Производственного Объединения "Союзэнергоавтоматика"
Priority date: 1981-05-13
Filing date: 1981-05-13
Publication date: 1983-02-15

Description

Изобретение относитс к аръЛатуро .строению .и может быть использовано в клапанах дл регулировани расхода жидкой или газообразной среды в различных технологических процессах, например на тепловых электрических . станци х дл регулировани питани водой паровых котлов.The invention relates to ar-Latour. And can be used in valves to control the flow of a liquid or gaseous medium in various technological processes, such as thermal electric. stations for regulating the supply of water to steam boilers.

Известен дисковый клапан, затвор которого содержит р асположенный в корпусе запорно-регулирующйй орган (золотник ), св занный со штоком и посто нно взаимодействующий с седлом, и разх рузочное устройст.во, состо щее из установленного в сливной полости клапана циликдра (камеры), соединенного обводным каналом с напорной магистралью, и расположенного в нем уплотненного поршн , один торец которого взаимодействует с золотником через звено, понижающее трение ll.A disc valve is known, the shutter of which contains a shut-off and regulating organ (spool) located in the body, which is connected to the rod and constantly interacts with the saddle, and the valve device consisting of a cylindrical valve (chamber) installed in the drain cavity of the valve, connected by a bypass channel with a pressure line, and located in it a sealed piston, one end of which interacts with the valve through the link, reducing friction ll.

Недостатками этого клапана вл ютс сложность конструкции и низка ремонтопригодность.The disadvantages of this valve are design complexity and low maintainability.

Наиболее близким по технической сущности к изобретению вл етс зат- вор самоуплотн ющего дискового клапана , содержащий корпус с напорной и сливной полост ми, установленныйThe closest in technical essence to the invention is a self-sealing disc valve plug, comprising a housing with a pressure and drain cavities, installed

в нем запорно-регулирующйй орган, взаимодействующий с седлом, разгруг зочное устройство, выполненное в виде цилиндра, в котором расположен уплотненный и соединенный со шпинделем плунжер, имеющий активные поверхности большей и меньшей площади , образующие полости, сообщенные соединительными каналами с напор10 ным и сливньгм трубопроводами, и упорный подшипник 2.there is a shut-off and regulating body interacting with the saddle, a razgredochny device made in the form of a cylinder in which the plunger is sealed and connected to the spindle, having larger and smaller active surfaces, forming cavities communicated by connecting channels with pressure and drain pipelines and thrust bearing 2.

Недостатками данного устройства вл ютс сложность конструкции-JHaличиЪ выносного узла разгрузки, бу-15 гел , двух наружных соединительных каналов, специального сочленени шпиндел с золотником, рассчитанного на большие раст гивающие усили и недостаточна надежность (из-за The disadvantages of this device are the complexity of the design — JH of the external unloading unit, bu-15 gel, two external connecting channels, a special articulation of the spindle with the spool, designed for large tensile forces and lack of reliability (due to

20 наружной установки узла разгрузки люба течь в уплотнении разгрузочного плунжера требует немедленного ремонта клапана)..20 external installation of the discharge unit any leakage in the seal of the discharge piston requires immediate repair of the valve) ..

Целью изобретени вл етс упро The aim of the invention is to simplify

25 щение и повышение надежности.Поставленна цель достигаетс тем, что в затворе дискового клапана , содержащем корпус с напорной и сливной полост ми, установленный в 25 Improvement of reliability. The goal is achieved by the fact that the valve of the valve, which includes a housing with a pressure and drain cavities, is installed in

Claims

30, it has a locking registering body that interacts with the saddle, a unloading device made in the form of a cylinder in which a plunger is placed, which is sealed and connected to the spindle, forming a cavity with the cylinder connected by a connecting channel and thrust bearing, cylinder flax in the pressure cavity of the housing, the thrust bearing is placed between the cylinder and the housing, and the plunger is made in one piece with the locking and regulating organ in which the connecting channel is made. FIG. 1 shows the closure in the full open position, longitudinal section; in fig. 2 shows section A-A in FIG. 1. In the housing 1 of the self-sealing disc valve, there is a fixed seat 2 and a valve (valve) continuously interacting with it. 3) The seat and spool separate the valve into the pressure 4 and the drain 5 parts. notches 7 for skipping E working environment. In the pressure part 4 of the valve there is an annular cylinder 8, supported through the thrust bearing 9 on the protrusion 10 of the housing 1. In the cylinder there is a stepped plunger 11, an annular cavity 12 is formed between the cylinder 8 and the plunger 11, and the plunger 11 is integral with the spool 3, connected through the spindle 13 with the actuator (not shown) and is coupled to the cylinder B along two cylindrical surfaces of different diameters. The annular cavity 12 between the cylinder 8 and the plunger 11 is sealed with sealing rings 14 and through a channel 15, made in the body of the spool 3, communicated with the drain part 5 of the valve. The shutter works as follows. The regulated medium under pressure P enters the pressure part 4 of the valve and goes to the discharge part 5, with pressure Рл through the holes formed when the windows of the saddle 2 are bored with the notches 7 of the spool 3. Turning the spool 3 - plunger 11 around axes (using section 13) you can change the area; openings than flow control. In the closed position of the valve, the spool completely covers the windows in the seat. Together with the plunger 11, the cylinder 8 also rotates around its axis, thus ensuring the best conditions for the operation of the seals 14. The flat sealing surfaces of the spool 3 and the saddle 2 are ground to each other. Differentiate the pressure of the LR P2 spool with great force pressed against the saddle. The force of pressing the spool to the saddle depends on the pressure drop of the Republic of Latvia, the area of the passable windows, and the contact area. spool with a saddle and cross-sectional area of the annular cavity 12. The same discharge pressure differential pressure acts on the annular discharge cylinder 8 as on the valve plug. Due to this, the differential force through the thrust bearing 9 is perceived by the housing 1. Accordingly, the plunger 11 - spool 3 is acted upon by a force directed opposite to the force and equal to it in magnitude, which reduces the pressing force of the spool to the saddle. Thus, by choosing the size of the discharge cylinder, you can reduce the contact pressure between the valve and the saddle to an optimum value that guarantees high quality of the valve. The gate has a constructive simplicity and simplicity of manufacture (there are no remote unloading unit, yoke, external bypass channels. , the joint of the spool with the spindle is simplified), increased reliability (failure to seal the discharge plunger 11 only leads to an increase in the uncontrolled valve admission, but does not require Claims of the disc valve, comprising a housing with a pressure and drain cavities, a shut-off and regulating valve installed in it, which interacts with the seat, a discharge device made in the form of a cylinder, in which a plunger is mounted and connecting to the spindle, forming with the cylinder a cavity communicated by a connecting channel with a drain cavity of the housing, and a thrust bearing, characterized in that, in order to simplify the design and increase reliability, the cylinder is mounted in ornoy body cavity, the thrust bearing is arranged between the cylinder and the housing, and the plunger is formed integrally with the shut-regulatory body, wherein the connecting channel is formed. Sources of information taken into account in the examination 1. USSR author's certificate 20476, cl. F 16 K 39/02, 1964.

2. USSR author's certificate in application number 2877258 / 25-08, cl. F 16 K 39/02, 1980 (prototype).