RU2640902C1 - Valve - Google Patents

Abstract

FIELD: machine engineering.

SUBSTANCE: in initial position, the protrusion of the shutter 2 spring-actuated 3 abuts the end part of the rod 11 of the piston 7, the valve cross-section is open. The initial position of the piston is provided by the force of the spring 6. When applying control pressure piston with rod 7, breaking the spring force 6, moves to another in its heel, with 1 bolt 2 lock with the end of stem 11 7 piston and sits on the saddle seal enclosure 1, closing the orifice valve and lug bolt 2 comes into the groove end part 11 7 piston rod. The required tightness to the piston is provided by the ring 9 and the collar 10.

EFFECT: use of this valve allows the valve to be held in the open position by the piston rod and allows the gate to fit into the seat ring when the piston is moved by the control command.

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Description

The invention relates to valve engineering, namely to normally open valves containing a housing with a seat, a spring-loaded shutter with a seal, a piston with a rod for moving the shutter and designed to close the access of the working fluid from one line to another. It can be used in mechanical engineering, for example in rocket technology.

Currently, LREs use highways to control the leakage of components in LRE during long-term storage. When starting the liquid propellant rocket engine, it is necessary to cut off to eliminate component losses, for which shut-off valves are used. At the same time, the pressure of the components in the control lines from atmospheric increases when the LRE starts and can be both low, of the order of 20 kgf / cm ² , and high - 200-600 kgf / cm ² .

Known pyrovalve (Edelman AN, "Fuel valves LRE", publishing house Engineering, 1970, pp. 73-75), containing a locking element made in the form of a conical tube, a conical seat made in the outlet channel. The disadvantages of this pyrovalve are the inability to use for LRE with fuels that explode in contact with the powder gases generated by the combustion of the powder charge of the pyroenergy sensor, a large mass taking into account the electric cable for the pyroenergy sensor and a large current consumption for the liquid propellant rocket engine, in which the number of shut-off valves can be 6 and more.

Known shut-off valve with an electromagnetic actuator (Dobrovolsky MV "Liquid rocket engines", because of Mechanical Engineering, 1968, 240-241 S.: Fig. 6.14), containing a housing, inlet fitting 1, outlet fitting 6, lower valve 3, upper valve 7, electromagnet 9. The disadvantages of this shut-off valve are the need for the shut-off valve to operate when controlling the gas medium in the LRE lines, which is carried out after a certain time during storage of the components filled with LRE, the design complexity, large weight, taking into account the electric one cable and a large current consumption for the electromagnet.

Known check valve (application FR 2653200, IPC F16K 27/12, F16K 15/02), comprising a housing with inlet and outlet nozzles, a cover that covers the flow cavity of the housing, an element with a sleeve on the ribs and seat, installed in the housing with a seal, in contact with the saddle and made in the form of a fungus with a deaf central groove.

The disadvantage of the non-return valve is the impossibility of its use in mechanical engineering products operating according to control commands for opening and closing the passage section of highways, the relative complexity of the body, and a large mass.

A device for shutting off and sealing in a hydraulic line (US patent No. 3125108, class 137-68 dated March 17, 1964) containing a cylinder with lateral coaxial holes through which a pipe, a power cylinder and a pyroenergy sensor is passed.

The disadvantages of the device are the complexity of obtaining the profile of the interacting surfaces of the housing and the power cylinder involved in the deformation and pinching of the pipe to prevent leaks, the possibility of cracks in the pipe and a large mass taking into account the electric cable for the pyroenergy sensor and high current consumption for LRE, in which the number of shut-off valves can be 6 or more.

Known check valve (Dobrovolsky MV "Liquid rocket engines", because of Mechanical Engineering, 1968, 244 pp., Ill., Fig. 6.19a - prototype), containing an inlet fitting with a seat, a spring-loaded valve plate, a persistent protrusion.

The disadvantage of the non-return valve is the impossibility of its use in engineering products operating according to control commands to open and close the passage section of highways.

The objective of the invention is to keep the shutter in the open position by the piston rod and to ensure that the shutter fits onto the housing seat when the piston is moved by a control command.

The problem is solved in that the valve comprises a housing with a seat, a spring-loaded shutter with a seal, a support, according to the invention, a boss with internal step grooves is installed on the housing perpendicular to the valve axis, into which a spring-loaded piston with a rod and a plug with a control fitting are installed, on the piston rod a deep groove, forming the end part, a cylindrical protrusion is made at the end of the shutter, interacting along the end with the surface of the end part of the piston rod, while the smaller of the steps The grooves of the housing are made by inserting the openings of the housing outlet into the opposite wall, the piston interacts with the piston rod with the internal step grooves of the housing boss, a groove is made on the piston into which the seal is installed, and the distance from the outer surface of the end part to the inner surface of the stem groove is greater than the shutter stroke.

The diameter of the surface of the end part is less than the diameter of the rod interacting with the internal groove of the boss.

A combined seal is installed in the groove of the piston.

Running on the housing perpendicular to the valve axis of the boss with internal stepped grooves, in which a spring-loaded piston with a rod with a groove and end part and a plug with a control fitting is installed, allows the shutter to move to the seat on the housing seat when supplying control pressure and reliably cut off the working fluid from the input side valve.

The proposed valve is shown in FIG. 1, where:

1 - case with a saddle;

2 - shutter;

3, 6 - spring;

4 - support;

5 - fitting;

7 - piston with a rod;

8 - adapter;

9 - ring;

10 - cuff;

11 - end part of the rod;

12 - insertion into the wall of the housing;

13 - seal.

In FIG. 1 shows a cross-sectional view of a valve.

The valve consists of a housing with a seat 1, a spring-loaded shutter 2, a support 4, a fitting 5, a piston with a rod 7, an adapter 8, a ring 9, a sleeve 10, an end part of the rod 11.

The valve operates as follows.

In the initial position, the protrusion of the shutter 2 under the action of the spring 3 abuts against the end part of the rod 11, while the bore of the valve is open for gas analysis. The initial position of the piston is provided by the force of the spring 6.

When starting up the product, a control pressure is applied, under the action of which the piston with the rod 7, overcoming the spring force, moves all the way to the end of the housing 1, while the shutter breaks from the stop into the end of the rod 11 and sits with a sealant on the seat of the housing 1, cutting off the gas analysis line, and the protrusion of the shutter 2 enters the groove of the end of the rod 11. The required tightness on the piston is provided by the ring 9 and the sleeve 10.

Since the use of the valve is offered under conditions of high inlet pressures, for example, in rocket technology, the body, fitting, support, piston and adapter are made of 07X16H6-Sh steel, the shutter is made of 09X16H4B steel, the springs are made of 12X18H10T-V high-strength spring wire, the shutter seal - from rubber ИРП-1278, ring - from rubber ИРП-1118, cuff - from fluoroplast-4.

Thus, the use of this valve allows you to keep the shutter in the open position by the piston rod and ensures that the shutter fits onto the housing seat when the piston is moved by a control command.

Claims (3)

1. A valve comprising a housing with a seat, a spring-loaded valve with a seal, a support, characterized in that on the housing perpendicular to the axis of the valve a boss is made with internal stepped grooves in which a spring-loaded piston with a stem and a plug with a control fitting are installed, a deep piston rod is made a groove forming an end part, a cylindrical protrusion is made at the end of the shutter, interacting along the end with the surface of the end part of the piston rod, while the smaller of the stepped grooves of the housing is made with ezaniem the opposite wall of the housing outlet opening, the piston rod cooperates with stepped bores with internal lug housing the piston has a groove in which a seal, and the distance from the outer surface of the end portion to the inner surface of the bore stem longer shutter speed. 2. The valve according to claim 1, characterized in that the diameter of the surface of the end part is less than the diameter of the stem interacting with the inner groove of the boss. 3. The valve according to claim 1, characterized in that a combined seal is installed in the piston groove.

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