Shutoff and throttling device

FIELD: machine building.

SUBSTANCE: invention relates to pipeline valves and is intended for use in various industrial application for shutting of medium pumped through pipelines. The essence of the invention is that the shutoff and throttling device contains the case with output and input branch pipes located opposite to each other, rotary shutoff element - flat shutter, located between branch pipes, and a tailpiece, installed on the rotation axis; it is also fitted with two mutually independent pneumodrives (opening and closing); on the gate tailpiece the profiled surfaces are provisioned which contact the stems of pneumodrives, and the pneumodrives are cooled by flowing medium.

EFFECT: such design of the shutoff and throttling device will allow to ensure its serviceability at high temperatures.

2 cl, 4 dwg

 

The invention relates to valves and is intended for use in various industries at overlapping pumped through pipelines environment.

Known valve (see, patent No. 2176346 on application No. 99126561/06, 15.12.1999,), in the housing between the seats which is the gate. The gate is installed with the possibility of rotation around the Central axis and has a penetration hole and a solid plot to overlap the through-holes saddles. Drive rotation of the gate kinematically connected with the peripheral part of the gate.

The disadvantage of the design is hand-drive, in which you cannot create remote and rapid opening and closing of the gate, which reduces the efficiency and safety of operation.

It is also known shut-off and throttling device (see, patent No. 1814001 on application No. 4849727/29, 10.06.90,), adopted as a prototype of the invention, comprising a housing with an output and an input socket located coaxially relative to each other and the locking element sliding type, located between the nozzle and provided with a lock box, made in the form of a circle for forming the circumference of the triangle with the apex located parallel to the axis of movement of the element.

The disadvantage of this shut-off and throttling devices is the inability to work with a coolant having a temperature is ≥1000°C. Element seals the drive roller does not provide the performance at the same temperature. Spring and o-ring do not work at temperatures ≥1000°C.

Proposed design of shut-off and throttling device, operable when the coolant temperature above 1000°C.

To do this, shut-off and throttling device includes a housing with output and input sockets, spaced opposed, rotatable locking element in the form of a flat valve (gate), located between the nozzles, and a shank mounted on the axis of rotation, and provided with two independent of each other. (opening and closing), on the shank of the gate is made of profiled surface in contact with the rods of the pneumatic and pneumatic performed cooled by flowing environment.

The design of the steering actuator includes a housing with terminals for supplying the control pressure gas and for supplying and discharging the cooling medium, the guide sleeve in the form of a Cup having inner and outer walls, which made the channels for the cooling medium, and a rod mounted in the guide sleeve, with management and the cooling cavity of the pneumatic actuator sealed outer and inner bellows, respectively.

In the proposed design used klaida the s drives in the construction of which are not used temperaturescale materials.

The invention is illustrated by drawings, where Fig.1 - presents a General view of the shut-off and throttling device for high temperature environment in isometric in Fig.2 - General view, in section, Fig.3 - image of the reservoir divided by a partition into two sections (section a-a) of Fig.4 is a General view of the actuator and the flow pattern of the cooling fluid or gas control valve actuator.

Shut-off and throttling device contains the following elements:

- case 1 with terminals a and B for inlet and gas outlet;

a shut - off element in the form of a flat valve 2 and a shank 3, is installed on the axis of rotation 4;

cooling the flowing medium pneumatic closure 5 and the opening 6;

- shaped surface 7 on the shank 3 of the locking element;

the stem 8 of the pneumatic actuator;

- the body of the pneumatic actuator 9;

tip 10 supply of the control gas;

the lugs 11 and 12 for supplying and discharging the cooling medium (liquid or gas);

- guide sleeve 13 in the form of a Cup having an inner 14 and outer 15 walls that have 16 channels for the cooling medium;

- the outer bellows 17, the sealing control cavity G of the pneumatic actuator;

- the inner bellows 18, sealing the cooling cavity In which newimproved.

When working gas of high temperature 1000°C under pressure supplied to the NIB And fills the valve and is discharged to the consumer through the tip B.

Opening and closing shut-off and throttling device is performed by applying control pressure to the handpiece 10 to be cooled. 6 and 5. Cooling of the pneumatic circuits 5 and 6 is carried out according to the scheme in Fig.4 when applying a cooling medium to the tip 12 of a pneumatic cylinder.

In the design of the shut-off and throttling devices are not used temperaturescale material, which ensures its efficiency at high temperatures.

1. Shut-off and throttling device, comprising a housing with output and input sockets, spaced opposed, rotatable locking element in the form of a flat valve, located between the nozzles, and a shank mounted on the axis of rotation, characterized in that it has two independent of each other. (opening and closing), on the shank of the locking element is made of profiled surface in contact with the rods of the pneumatic and pneumatic performed cooled by flowing environment.

2. Shut-off and throttling device under item 1 characterized in that the actuator includes a housing with terminals for supplying a control gas pressure and odvod and exhaust the cooling medium, the guide sleeve in the form of a Cup having inner and outer walls, which made the channels for the cooling medium, and a rod mounted in the guide sleeve, with management and the cooling cavity of the pneumatic actuator sealed outer and inner bellows, respectively.



 

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