RU2591375C1 - Valve - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention relates to valve industry, specifically to valves with pneumatic control, and is intended for start-up and shut-off of working medium in a wide range of pressures. Valve comprises a body with inlet, outlet pipes and main seat, gate with rod, and a drive. In outlet cavity of body there is sleeve with an inner hole on ribs with a drain channel. In cavity of body on side of drive there is a stepped groove. At end of large diameter of stepped groove of body there is a seat. On side of outlet cavity of body at gate with rod there is a protrusion with a central blind hole. On rod of gate there is a groove and threads. In stepped groove of body there is a piston with a seal, a groove at outer diameter, with central sleeve with an end, with an inner groove and thread. Outer diameter of protrusion of gate with rod interacts with diameter of inner hole of sleeve on ribs of body. Valve rod on groove and thread interacts with central sleeve of piston along inner groove and thread. Outer diameter of central sleeve of piston interacts with smaller diameter of stepped groove of body. Larger diameter of piston interacts with larger diameter of stepped groove of body. Piston seal is in contact with seat of body.

EFFECT: use of said unit allows simplifies design, reduces hydraulic resistance and weight as compared to prototype.

5 cl, 1 dwg

Description

The invention relates to valve manufacturing, namely to valves with pneumatic control and is intended for starting and cutting off the working fluid in a wide pressure range. The invention can be used in mechanical engineering, for example, in power plants located on aircraft, on airplanes or in rocket technology, for example, in propulsion systems.

Known control valve with a perforated glass (application JP 2-53661, IPC F16K 3/32, F16K 47/02), comprising a housing, a perforated glass with a large number of holes, a locking element and a tapered flange in contact with the shutter. The locking element in this design is made unloaded.

The disadvantages of this valve is the increased value of hydraulic resistance at high values of the flow of the working fluid and the difficulty of ensuring high tightness at the place of sealing of the locking element on the conical surface of the flange.

Known shut-off and shut-off valve (patent RU 2386880 C1, IPC F16K 3/24, F16K 39/02, F16K 47/02), comprising a housing with inlet and outlet channels, a shutter made in the form of a rod with a piston, with a sealing surface and holes, a locking and regulating shutter, made in the form of a stepped sleeve-plunger with a sealing surface, and a saddle mounted in the housing. The locking element in this design is made unloaded.

The disadvantages of this valve are the complexity of manufacture and high hydroresistance.

Known electro-pneumatic valve (patent RU 2267685 C2, IPC F16K 31/02) containing a housing with an inlet, outlet cavity and seat made in the inlet cavity, a main valve with an internal groove and with an mechanical seal, a pilot valve with an mechanical seal, the bottom of the housing, springs and actuator .

The disadvantages of the electro-pneumatic valve are the increased mass of the electromagnet during operation of the electro-pneumatic valve at high pressures and the complexity of manufacturing.

Known control valve (patent RU 2394178 C2, IPC F6K 1/44, F16K 47/04) containing a housing with input and output cameras, a glass, seats, shutter with plungers.

The disadvantages of the control valve are the difficulty of ensuring tightness at the places of sealing of the plungers and the complexity of manufacturing the valve.

Known batch control valve for steam turbines (patent US 4679769 IPC F16K 1/32), comprising a housing with a seat, a cover, a hardened sleeve, a rod and a locking element with a Central hole.

The disadvantages of the valve include the complexity of the manufacture of the unit and the inability to ensure high tightness at the place of sealing of the shut-off element in the housing under conditions of repeated operations.

Closest to the invention in technical essence is a shut-off and control valve (patent RU 2298128 C2, IPC F16K 3/24, F16K 47/04 - prototype), comprising a housing with inlet and outlet channels, a seat, a cover, a shutter-control double-shutter with piston and rod, as well as drive.

The disadvantages of the shut-off and control valve, adopted as a prototype, include the complexity of the valve design, high hydraulic resistance and high mass of the unit for valves with a large flow area.

The task of the invention is to simplify the design, reduce hydraulic resistance and mass.

The problem is solved as follows.

In the known device comprising a housing with inlet and outlet nozzles and a main seat, a shutter with a stem and an actuator, according to the invention, a sleeve is provided in the outlet cavity of the housing with an internal hole on the ribs with a drainage channel, a step groove is made in the cavity of the housing on the drive side, at the end a large diameter of the stepped groove of the housing is made a saddle, on the side of the output cavity of the housing on the shutter with a rod there is a protrusion with a central blind hole, a groove and threads are made on the shutter rod, in a step In this case, a piston is installed with a seal, a groove in the outer diameter, with a central sleeve with an end face, with an internal groove and a thread, while the external diameter of the valve protrusion with the rod interacts with the diameter of the internal bore of the sleeve on the body edges, the valve stem interacts with the groove and thread with the central piston bushing along the internal groove and thread, the outer diameter of the central piston bushing interacts with the smaller diameter of the stepped groove of the housing, the larger the piston diameter interacts uet larger diameter stepped bore casing, the piston seal is in contact with the seat body.

A seal is installed on the outer diameter of the protrusion of the shutter with the stem.

A seal is installed in the groove of the shutter rod, interacting with the inner groove of the central piston bushing, and an L-shaped cuff with a protrusion at the end, interacting with an outer diameter with a smaller diameter of the stepped groove of the housing, and with an end protrusion at the end of the central piston bushing.

A G-shaped cuff with a protrusion along the end face is installed in the piston groove, interacting with the outer diameter with the inner diameter of the larger stepped groove of the housing, and with the end protrusion at the end of the piston groove.

A lock nut with a thin-walled collar, interacting with the piston, is installed on a smaller thread of the valve stem.

The proposed valve is presented in Fig 1,

where: 1 - housing;

2 - sleeve on the ribs in the housing;

3 - step groove of the housing on the drive side;

4 - shutter with a stock;

5 - protrusion on the shutter with the rod;

6, 7 - seal (rubber ring);

8, 9 - a protective washer;

10 - a piston;

11 - the central sleeve of the piston;

12, 13 - cuff;

14, 15, 16 - support;

17, 18 - slotted spring;

19 - a cover;

20 - hairpin;

21 - a nut;

22 - a lock nut;

23 - spring;

24 - screw;

25 - washer;

26 - U-shaped seal.

The valve comprises a housing 1 with inlet and outlet nozzles, a sleeve on the ribs 2 and a step groove from the side of the actuator 3, a valve with a stem 4 is installed in the housing 1, which is in contact with the main seat made in the housing, the valve with the rod 4 is made with a groove and threads the stem and the protrusion 5 on the shutter with annular grooves on the outer diameter, in which the seals 6 and protective washers 8 are installed, the outer diameter of the protrusion 5 of the shutter with the stem 4, seals 6 and protective washers 8 interact with the diameter of the inner bore of the sleeve on the ribs 2 to housing 1, in the groove on the drive side 3 of the housing 1 there is a piston 10 with a central bushing 11, a groove on the outer diameter, an internal groove and a thread in the central bushing of the piston 10, the valve stem 4 along the groove and thread interacts with the central bushing of the piston 11, into the grooves the valve stem 4 has a seal 7, a protective washer 9 and a cuff 12 of a L-shaped section, designed for hermetically separating the inlet and control cavity of the valve, while the outer diameter of the central sleeve 11 of the piston 10 interacts with a smaller diameter meter stepped groove 3 of the housing 1, the larger diameter of the piston 10 interacts with a larger diameter of the stepped groove 3 of the housing 1, a sleeve 13 is installed in the groove of the large diameter of the piston, and the piston seal contacts the seat made in the housing 1.

For reliable operation of the cuffs 12 and 13, they are installed with supports 14, 15, spring-loaded slotted springs 17, 18.

The valve is made with the possibility of multiple bulkheads with a detachable body 1 and a cover 19 on the studs 20 and nuts 21, the piston 10 is locked with a valve with a rod 4 by means of a locking nut 22, a thin-walled antenna which bends into the groove of the valve with a rod 4.

The valve operates as follows. At the command to open the valve, control pressure is supplied through the nozzle "Horn.", The pressure will fall into the control cavity of the housing 1 and acting on the effective area of the piston 10, overcoming the force of the spring 23 moves the valve with the rod 4 to the piston 10 on the saddle of the housing 3, This opens the bore of the valve.

To ensure that the valve opens at high pressures, the valve with the stem 4 is balanced, the maximum diameter of the cuff of the L-shaped section 12 installed in the valve stem is equal to the average diameter of the seal of the valve 4 along the main seat.

This position of the valve is maintained during the entire time the component is supplied. When the valve closes, the control pressure is relieved from the Horn. and the shutter with the stem 4 moves under the action of the force of the spring 18, stopping the supply of the component from the input to the output, while closing the valve is facilitated by the sealing by a cuff 12 installed in the groove of the shutter rod with the stem 4, which relieves the shutter from the action of the high working pressure of the component from the input side.

When opening the valve in the presence of high pressure from the outlet side, the opening of the valve is facilitated by seals 6 installed in the protrusion 5 of the shutter with a stem 4, which unload the shutter from the action of the high working pressure of the component.

Since the use of the valve is planned in power plants located on aircraft, such as airplanes or in rocketry, its parts are made of materials: steel 07X16H6 for housing 1; shutter with a stem 4; piston 10; lids 19; slotted springs 17, 18; supports 14-16; screw 24; hairpins 20; nuts 21; U-shaped seal 26; ftoroplast - 4 for protective washers 8, 9 and cuffs 12, 13; steel 12X18H10T for lock nut 22; springs 23 and washers 25.

Thus, the use of this valve allows you to simplify the design, reduce hydraulic resistance and weight.

Claims (5)

1. A valve comprising a housing with inlet and outlet nozzles and a main seat, a shutter with a stem, an actuator, characterized in that a sleeve is provided in the outlet cavity of the housing with an internal hole on the ribs with a drainage channel, a stepped groove is made in the housing cavity on the drive side, a saddle is made at the end face of the large diameter of the stepped groove of the housing, a protrusion with a central blind hole is made on the valve outlet cavity on the shutter with the stem, a groove and threads are made on the shutter rod, the housing has a piston with a seal, a groove in the outer diameter, with a central sleeve with an end face, with an internal groove and thread, while the outer diameter of the protrusion of the shutter with the rod interacts with the diameter of the inner bore of the sleeve on the edges of the housing, the shutter rod runs through the groove and thread with the central the piston sleeve along the internal groove and thread, the outer diameter of the central piston sleeve interacts with the smaller diameter of the stepped groove of the housing, the larger diameter of the piston interacts with large ametrom stepped bore casing, the piston seal is in contact with the seat body. 2. The valve according to claim 1, characterized in that a seal is installed on the outer diameter of the valve protrusion with the stem. 3. The valve according to claim 1, characterized in that a seal is installed in the groove of the shutter rod, interacting with the inner groove of the central piston bushing, and an L-shaped cuff with a protrusion at the end, interacting with an outer diameter with a smaller diameter of the stepped groove of the housing, and with an end protrusion - along the end face of the central bushing of the piston. 4. The valve according to claim 1, characterized in that a G-shaped cuff is installed in the piston groove with a protrusion along the end, interacting with the outer diameter with the inner diameter of the larger stepped groove of the housing, and with the end protrusion at the end of the piston groove. 5. The valve according to claim 1, characterized in that a lock nut with a thin-walled collar interacting with the piston is mounted on a smaller thread of the valve stem.

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