RU192042U1 - TWO-LINE TWO-POSITION HYDRAULIC DISTRIBUTOR - Google Patents

Abstract

The invention relates to hydraulic units, in particular to valve-type hydraulic distributors open in a normal position, designed to control the flow of a working fluid in a hydraulic system. The two-line on-off directional valve comprises a cylindrical body (1) made with axial and radial holes (2 and 3), made in the axial hole (2) of the seat (4) for the shutter (5) moved in the said body (1). The shutter (5) is made with channels (12 and 13), with installed check ball valves (14 and 15, respectively), working in the forward direction, the first of which communicates an axial hole (2) with a cavity (8) of the housing (1) and the second is a radial hole (3) with a cavity (8) of the housing (1). In the shutter (5), a third channel (16) is made with a check ball valve (17) installed in it, operating in the opposite direction and communicating the cavity (8) of the housing (1) with an axial hole (2). A rod (7) is installed in the cavity (8) of the housing (1), made at the end with a conical control valve (9) interacting with a seat (20) made in the third channel (16). In the cavity (8) of the housing (1), a guide (6) of the rod (7) is installed with a spring (10) placed in it. The third channel (16) is located along the axis of the shutter (5) and is connected to the radial channel (18) made in the shutter (5), which communicates the cavity (8) of the housing (1) with the radial hole (3) of the housing (1). In the radial channel (18) of the shutter (5), a check ball valve (19) is installed, operating in the opposite direction. Check ball valves (14, 15 and 17) are equipped with stoppers. The control of the two-line on-off directional control valve is electromagnetic. The technical result consists in increasing the reliability of a two-line on-off valve. 1 s.p. f-ly, 2 ill.

Description

The utility model relates to hydraulic units, in particular to valve-type hydraulic distributors open in a normal position, designed to control the flow of a working fluid in a hydraulic system.

A hydraulic valve is known, comprising: a housing having a main hole with a first hole, a second hole and a valve seat between them, the housing additionally having a first branch channel extending from the second channel to the main hole, and a second branch channel extending from the first port to the main hole ; a plate slidably disposed in the main hole and forming a control chamber in the main hole on a side of the plate remote from the valve seat, the plate having a control channel extending between the first hole, the second hole and the control chamber; a control valve element mounted slidably in the main hole and controlling a fluid flow between the control chamber and each of the first passage channel and the second passage channel; a first non-return valve restricting flow through the first bypass channel only in the direction from the control chamber to the second port; a second non-return valve restricting the flow through the second bypass channel only in the direction from the control chamber to the first hole; a third non-return valve restricting flow only in the direction from the first port to the control channel; a fourth non-return valve restricting flow only in the direction from the second port to the control channel; a feedback spring biasing the plate and the control valve element from each other and biasing the plate in engagement with the valve seat; and a linear actuator with an electric actuator, including a pilot valve element, to open and close the connection between the control chamber and the first branch pass and the second branch pass (US patent 6869060, IPC F15B 13/04, F16K 31/06, published March 22, 2005 g.).

The closest to the claimed technical solution for the combination of essential features is a bi-directional cartridge valve, comprising: usually a cylindrical valve body, including an end (axial) hole and a lateral (radial) hole, each hole in the axial cylindrical hole that defines the valve chamber; a flow control element (shutter) moved in said valve chamber between the open valve position to open the flow path between the two ports and the closed valve position to block the flow path between the two ports, said flow control element including a first channel provided the first non-return valve and connecting the specified end hole to the specified valve chamber, and the second channel to the second non-return valve connecting the said side hole to the specified valve chamber Roy; a cylindrical pilot seat (stem guide) in said chamber, including a partial axial hole defining the pilot chamber, and a hole in the saddle connecting the valve chamber to the pilot chamber; a third channel through said valve body is provided with a third check valve connecting said control chamber to said side opening; a fourth channel through said valve body connecting said pilot chamber to said valve chamber in a selected axial position occupied by said flow control element; a fifth channel through said flow control element provided with a fourth check valve and connecting said valve chamber in a selected axial position to said end hole to provide a fluid channel communicating with said fourth channel; and a control valve (conical control valve at the end of the stem) moved in said control chamber between the open position of the control valve to open a flow path between said valve chamber and said control chamber, whereby a fluid pressure in either of said two openings forces said control element flow to move to the open position of the valve (patent US 5072752, IPC F16K 31/40, F16K 31/42, publ. 12/17/1991).

The known technical solution has insufficient reliability due to the complexity of the design due to the large number of actuators, namely springs, check ball valves, bolts and seats.

The task is to increase the reliability of a two-line on-off directional control valve.

The technical result coincides with the task and is achieved due to the fact that in a two-line on-off directional control valve containing a cylindrical body made with axial and radial holes, a seat is made in the axial hole for the shutter moving in the said body, having channels with reverse ball mounted therein valves operating in the forward direction, the first of which communicates an axial hole with the body cavity, and the second a radial hole with the body cavity, and the third al with a reverse ball valve installed in it, working in the opposite direction, and communicating the body cavity with an axial hole, a rod installed in the body cavity, made at the end with a conical control valve interacting with the seat, the rod guide, with the spring placed in it, the third the channel is located along the axis of the shutter and is connected to the radial channel made in the shutter, which communicates the housing cavity with the radial opening of the housing, and a check ball valve is installed in the radial channel of the shutter, p operating in the opposite direction, in addition, the seat with which the conical control valve of the rod interacts is made in the third channel.

Check ball valves are equipped with limiters.

Distinctive essential features, consisting in the fact that the third channel is located along the axis of the shutter and is connected to the radial channel made in the shutter, which communicates the housing cavity with the radial opening of the housing, while the check valve is installed in the radial channel of the shutter, operating in the opposite direction, in addition the seat, with which the conical control valve of the rod interacts, is made in the third channel, which made it possible to increase the reliability of the two-line on-off valve.

Thus, the claimed combination of essential features of the independent and dependent claims is aimed at improving the reliability of a two-line on-off valve.

An analysis of the known technical solutions, carried out according to scientific, technical and patent documentation, showed that the set of essential features of the claimed technical solution is not known from the prior art, therefore, it meets the patentability condition of the utility model - “novelty”.

The claimed technical solution is illustrated by the drawings:

FIG. 1 - two-line on-off directional control valve, in the context;

FIG. 2 is a section AA in FIG. one.

The two-line on-off directional control valve comprises a cylindrical body 1 made with an axial hole 2 and radial holes 3. A seat 4 is made in the axial hole of the body 1. A shutter 5 is mounted in the housing 1 with a possibility of movement, one end of which interacts with the saddle 4 of the housing 1. From the opposite end in the housing 1, a guide 6 of the rod 7 is installed, with the formation of a cavity 8 of the housing 1 between the shutter 5 and the guide 6. In the cavity 8, a rod 7 is installed, made at the end with a conical control valve 9. In the direction 6, a spring 10 is placed, fixed on the stem 7 by a washer 11 and a lock ring.

The shutter 5 is made with the first and second channels 12 and 13, with installed check ball valves 14 and 15, respectively, working in the forward direction. The first channel 12 communicates an axial hole 2 with a cavity 8, and the second channel 13 communicates a radial hole 3 with a cavity 8. The shutter 5 also has a third channel 16 located along the axis of the shutter 5 and communicating the cavity 8 with an axial hole 2. In the channel 16 is installed check ball valve 17, working in the opposite direction.

In the shutter 5, a radial channel 18 is made, connected to the channel 16 and communicating the cavity 8 with the radial hole 3 of the housing 1. In the channel 18 there is a check ball valve 19 operating in the opposite direction. The third channel 16 is made with a saddle 20 interacting with a conical control valve 9 of the rod 7.

Check ball valves 14, 15 and 17 are equipped with stops made in the form of washers 11, fixed by snap rings. The limiter for the check ball valve 19 is the wall of the housing 1.

The tightness of the two-line on-off directional control valve is provided by the sealing rings.

The control of the two-line on-off directional control valve is electromagnetic. The outer surface of the housing 1 from the side of the rod 7 is threaded for connection with an adapter 22 connecting the housing 1 to the electromagnet 21. In this case, the rod 7 is connected to the armature of the electromagnet 21.

The two-line on-off directional control valve operates as follows.

In the normal position, a two-line two-way valve distributes fluid in both directions, namely: when the pressure in the hole 2 (axial channel of the valve) exceeds the pressure in the hole 3 (radial channel of the valve), the liquid under the influence of a pressure differential enters from hole 2 through channel 12, the cavity 8 and channel 18 into the hole 3. The resulting pressure drop across the valve 5 leads to its displacement from the seat 4 of the housing 1, as a result of which the hole 2 communicates with the hole rstii 3. When the fluid pressure in the hole 3 is greater than the pressure in the hole 2, the fluid enters through the channel 13 in the shutter 5, into the cavity 8, then through the axial channel 16 into the hole 2. The resulting pressure drop across the shutter 5 generates a force that biases the shutter 5 from saddles 4, while hole 3 communicates with hole 2.

When applying an electrical control signal to the solenoid of the electromagnet 21, the occurrence of electromagnetic force at the armature of the electromagnet 21 leads to the displacement of the rod 7 in the direction of the shutter 5. The axial channel 16 of the shutter 5 is blocked by the fit of the conical control valve 9 of the rod 7 on the seat 20, which leads to the separation of holes 2 and 3 with a differential pressure of shutter 5 in either of two directions. In this case, the resulting pressure drop across the shutter 5 leads to the formation of a force pressing it against the seat 4. The channels in the shutter 5 are locked by pressing the balls 14, 15, 17 and 19 to the conical surfaces (saddles) of the shutter channels 12, 13, 16 and 18 5.

The claimed technical solution allowed to increase the reliability of a two-line on-off valve, thus achieving a technical result.

A two-line on-off directional control valve can be manufactured on standard equipment using modern technologies and materials.

Claims (2)

1. A two-line on-off directional valve comprising a cylindrical body made with axial and radial openings, a seat made in an axial hole for a shutter moving in said body, having channels, with forward mounted ball valves installed in them, the first of which reports axial a hole with a body cavity, and the second a radial hole with a body cavity, and a third channel with a check ball valve installed in it, working in the opposite direction and a communicating body cavity with an axial hole, a rod installed in the body cavity, made at the end with a conical control valve interacting with the seat, a rod guide, with a spring placed in it, characterized in that the third channel is located along the shutter axis and connected to in the shutter a radial channel communicating the cavity of the housing with a radial hole of the housing, while in the radial channel of the shutter there is a check ball valve operating in the opposite direction, in addition, a saddle with which odeystvuet conical control valve rod, is made in the third channel. 2. The control valve according to claim 1, characterized in that the check ball valves are equipped with limiters.

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