SU1441357A1 - Combination valve - Google Patents

Abstract

The invention relates to the field of automatic control and can be used in hydraulic systems for various purposes. The purpose of the invention is to expand the field of application of the combination valve. The combined valve includes a housing 1, housed in the housing and spring-loaded main valve 2 with the first 3 and second 4 stages and controlling

Description

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valve with shut-off 5 and throttling 6 elements. The valve 2 forms with a case of a sticking-up 7, nepBjno 8, intermediate 9, second 10, and 11 cavity. The first stage 3 forms the main valve stopper, the seat of which is made in the housing between the first and / or intermediate cavities, the first 8 and second 10 cavities being connected to external lines, respectively, through the first 12 and second 13 channels, and the supra-valve cavity 7 5 of the control valve with drain channels 14. The main valve has an axial 15 and a radial 16 hole. The control valve is mounted coaxially to the main valve,

and the throttling element 6 is placed in the axial hole of the main valve from the side of the valve valve. A groove 17 is made in the radial hole 16 and a switching element is placed in the form of a two-stage or single-stage spool 18. One of the ends of the radial hole is made deaf, the cavity between this face and the valve is connected to the intermediate cavity, and the groove 17 is connected to the axial hole 15 and through the axial orifice and the throttling element 6 - with an over-valve cavity. The spring 21 of the control valve is equipped with an adjusting BINT 22. 2 Cp f-ly, 1 ill.

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This invention relates to automatic regulation and can be used in hydraulic systems for various purposes.

The purpose of the invention is to expand the field of application of the combination valve.

The combination valve is shown in the drawing.

The combined valve contains, the body t, the main valve 2 with the first 3 and second 4 stages, which are spring-loaded in the case Hi, and the control valve with the shut-off 5. and throttling 6 elements. The main valve forms with the body an over valve 7, a first 8, an intermediate 9, a second 10 and a subvalvate 11 cavity. The first stage 3 forms the main valve stopper, the seat of which is made in the housing between the first 8 and intermediate 9 cavities, the first and second cavities being connected to the first 12 and second 13 channels respectively, and the valve valve 5 is connected through the locking element 5 to the drain channel 14 The main valve is made axial 15 and 16 radial holes. The control valve is mounted coaxially with the main valve, the throttling element being placed in the axial opening

main valve from the nadklapannoy cavity. The radiating hole has a groove 17 and a switching element is placed, which can be made in the form of a single-stage or two-stage spool 18, whose level 19 of a smaller diameter is located in the radial hole on its side

10 end connected to the first cavity, and the cavity between the spool 18 and the blind end of the radial hole is connected through the channel 20 to the second cavity 9. The groove 17 is connected to

5 with an axial orifice 15 and through an axial orifice and a throttling element 6 -. With the over-valve cavity 1. The control valve spring 21 is equipped with an adjusting screw 22, 20. The combined valve in the hydraulic system can be used as a safety valve, as a pressure reducer or as a valve. pulsator.

25 The combination valve operates as follows.

When using a combination valve as a safety valve, fluid under pressure 30 from the hydraulic system is supplied to channel 12e. Channel 13 is connected to a drain. The spool 18 is shifted to the right extreme position, opening the axial bore 15 of the main valve 2. The fluid passes into the cavity 11 and through the throttling gap of variable cross section into the cavity 7. When the pressure in the cavity 7 reaches the value determined by the spring 21 setting, the locking element 5 rises and passes fluid from cavity 7 through ka

In this way, channel 12 is connected to the pressure control line of the first system, and channel 13 is connected to the pressure line of the second system. The two-stage spool 1 is displaced from the neutral position and opens the axial bore 15. 8 Following the locking element 5 of the valve 2 rises and communicates between each other channels 12 and 13. In this case, the pressure

cash 13 to drain. This leads to a rise in the working fluid in the protected.

The valve 2, as a result of which the passage of the liquid from the hydraulic system through the channel 13 to the drain is opened.

In the pressure reduction mode, the liquid is supplied through channel 13 and the outlet through channel 12. The two-stage valve 18 is displaced to the extreme left position, opening the axial bore 15 of the axle 15.

the hydraulic systems are leveled and remain constant in the future. The pressure is determined by adjusting the spring 21 of the control valve. In the event of an overload, the entire total consumption of the two hydraulic systems passes through channel 14 to the discharge. When the valve is open, the 2. goldman 18 is held in the left extreme position by spacing25

new valve 2. Fluid inlet area of its ends. em in the hole 15 and further through the drok-;

Claims (3)

1. A combined valve, comprising a housing with first, second and drain channels, housed in a housing. : and spring loaded main valve with first and second steps : And control valve with shut-off and  throttling elements, with the main valve forming the valve above the valve, first, intermediate, second and valve valve, the first stage forms the main valve gate. The supply of the liquid is performed by the 35 th valve, the seat of which is made Through channel 13, and retraction through channel 12. Spool 18 moves to the left, opening aperture 15. Liquid flows through the throttling slot a into cavity 7. The locking element 5 rises, passing the fluid through channel 14 to a drain. Valve 2 opens and connects channels 13 and 12 through cavities 10, 9 and 8. The pressure acting on the ends of the plunger 18 is equalized and the spool returns to the middle position by blocking the axial bore 15. The main and control valves return to their original position. Then the cycle of operation of the apparatus is repeated, which allows the output to generate stable hydraulic pulses. Along with the operating modes described above, it is possible to use a combination valve as a safety valve of direct action for two hydraulic systems with a low total flow rate. With с14413574 In this way, channel 12 is connected to the pressure hydroline of the first system, and channel 13 is connected to the pressure hydraulic line of the second system. The two-stage spool 18 is displaced from the neutral position and opens the axial bore 15. 8 Following the closure element 5, the valve 2 rises and communicates between each other channels 12 and 13. In this case, the pressure - working fluid in protected. the hydraulic systems are leveled and remain constant in the future. The pressure is determined by adjusting the spring 21 of the control valve. In the event of an overload, the entire total consumption of the two hydraulic systems passes through channel 14 to the discharge. When the valve is open, the 2. goldman 18 is held in the left extreme position by spacing25  Invention Formula thirty 1. A combined valve, comprising a housing with first, second and drain channels, housed in a housing. : and spring loaded main valve with first and second steps : And control valve with shut-off and  throttling elements, with the main valve forming the valve above the valve, first, intermediate, second and valve valve, the first stage forms the gate of the main body between the first and intermediate cavities, the first cavity is connected to the first channel and through the gap between the saddle and gate with the intermediate cavity which is connected to the second cavity through an annular gap between the body and the end of the second stage from the side of the intermediate cavity, the second cavity is connected to the second channel, the main valve is provided with axial and radial holes, the axial hole is connected to the subvalval cavity, the radial hole is connected to the first cavity, and the supravalve cavity is connected through a stop element with a drain channel, characterized in that, in order to expand the field of application of the combined valve, the control valve is located coaxially with the main valve, and the throttling element is placed in the axial bore of the main valve from the side of the valve cavity, in the radial 514413576 the hole is made groove and 2. Valve according to claim 1, of tl and h a- a switching element is placed, which is connected with the fact that the switching element loaded with the ends with springs, the element is designed as a two-stage one of the ends of the radial spool , the step of a smaller version is made deaf, the inter-diameter cavity of which is located in a radius by a switching element and a blind hole from its end with a radial opening of a connecting-end connected to the first cavity; on with an intermediate cavity, the groove is connected to the axial bore and Q 3. A valve according to claim 1, about tl and h a through an axial orifice and a throttle valve, and so that the switching element - with the valve over the valve, is designed as a single-stage spool.