RU2625072C1 - Electromagnetic valve (options) - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: electromagnetic valve contains a casing 1 with an inlet 2 and an outlet pipebranch 3 and a venting to the atmosphere, a control coil and a spring-loaded armature 7 with a tube 8 installed inside the casing. The tube is located inside longitudinal channel 9 with an axial clearance. Ends of the longitudinal channel are closed by lower 10 and upper valves 11. Lower 15 and upper O-ring seal 16 are installed on the tube, forming an annular cavity together with the channel walls. Radial holes are made in the tube wall opposite mentioned cavity. The inlet pipebranch is connected to the channel between the lower valve and the lower seal, the outlet pipebranch is connected to the cavity between the lower and upper seals, and the venting to the atmosphere is connected to the channel between the upper valve and the upper seal. In the second embodiment, the upper end of the longitudinal channel is closed by valve 11, lower O-ring seal 15 and upper O-ring seal 16 are mounted on the tube. The upper O-ring seal is located at the top of the valve to seal the top of tube 9, the inlet pipebranch is connected to the channel between the valve and the upper seal, and the lower part of the tube is sealed with a lower O-ring seal and is connected to outlet fitting 3.

EFFECT: increased efficiency of the electromagnetic valve.

5 cl, 3 dwg

Description

The invention relates to valve engineering, namely to normally closed electromagnetic pneumatic valves and can be used for remote control of air lines.

The prior art known electromagnetic valve (see patent for PM No. 156381, CL F16K 31/02, publ. 10.11.2015).

An electromagnetic valve comprising a housing with inlet and outlet nozzles, a cylinder, a piston with a sealing element, an electromagnet, an armature with a sealing element, and a spring. The piston and the armature are mechanically interconnected by a gripper, a leakage channel is made inside the piston connecting the inlet pipe and the over-piston cavity, and a discharge channel, and a shut-off valve is installed inside the leakage channel, which is controlled by a pusher with an electromagnet anchor.

Known patent for utility model No. 33991, class. F16K 31/02, publ. 11/20/2003.

An electromagnetic valve comprising a housing of soft magnetic material, a coil, a cover with an opening for the passage of the working medium, a spring-loaded anchor, a shutter connected to the anchor. An annular protrusion is made in the lid, in which several openings for the passage of the working medium are located.

Known patent for utility model No. 140248, class. F16K 31/02, publ. 05/10/2014.

An electromagnetic valve comprising a housing with inlet and outlet channels, in which a seat is made, a membrane connected to the core and a compression spring, as well as a coil with a magnetic circuit having an annular gap located in the central part, while the coil with a magnetic circuit further comprises at least at least two permanent magnets located in the gap of the magnetic circuit symmetrically with respect to the axis of the core.

Known patent for utility model No. 101137, class. F16K 31/02, publ. 01/10/2011.

An electromagnetic valve comprising a locking unit, consisting of an armature and a locking element mounted in an inner sleeve, an inlet and an outlet pipe, a heating element, a retracting winding. The inner sleeve is divided by a newly introduced diamagnetic insert, sealed with mating flange and sleeve using o-rings or sealing material, fixed by electrically riveted mating zones in several places, and fixing the inner sleeve with the inlet pipe is carried out by means of a press fit and locking element, the locking unit is anchor with lateral longitudinal flats or grooves, or channels, at the end of which a locking element is made, made in the form of qi indricheskoy metal sleeve with internal undercuts reinforced rubber mixture having two working surfaces, and fixing its anchor nut carried newly introduced.

Known patent for the invention No. 258236, class. F16K 31/02, publ. 04/10/2016.

An electro-pneumatic valve comprising a housing in which a shutter and a piston are connected, and a control cavity of which is connected to the inlet cavity through a discharge valve controlled by an electromagnet. In the bolt and piston connection, a coaxially located and spring-loaded latch is installed with the possibility of reciprocating axial movement, which, with one end face with protrusions from the spring side, placed in the grooves of the shoulder made on the bolt rod, fixes it from turning around the axis, and the other end protrusions, one side of which has a slope, and the other is parallel to the axis, is meshed with counterpart protrusions located at the end of the piston, locks the bolt from turning I am.

The closest in technical essence to the claimed technical solution can be attributed to an electromagnetic valve containing a housing with inlet and outlet nozzles and exhaust into the atmosphere, a control coil and an armature with a spring-loaded tube located inside the longitudinal channel with axial clearance installed inside the housing (see patent RU 87236 , CL F16K 31/02, publ. 09/27/2009). The disadvantages of the known device are the high energy consumption of the switch and the relative fragility due to the presence of significant axial forces from the pressure of the working medium.

The objective of the invention is to remedy these disadvantages. The technical result is to increase the efficiency of the electromagnetic valve. The problem is solved, and the technical result is achieved by the fact that in the solenoid valve according to option 1, comprising a housing with inlet and outlet nozzles and exhaust to the atmosphere, a control coil and a spring-loaded armature with a tube located inside the longitudinal channel with axial clearance, are installed the longitudinal channel are closed by the lower and upper valves, and the lower and upper ring seals are installed on the tube, forming together with the channel walls an annular cavity, opposite which in the pipe wall ki provided with radial holes, wherein the inlet is fed to the channel between the upper and lower valve seals, the output - to the cavity between the lower and upper seals and outlet to the atmosphere - to a channel between the top flap and the top seal. In the free position, the tube is preferably drawn against the bottom valve. The solenoid valve can be equipped with a spring-loaded lever, which enables manual lifting of the tube to the stop in the upper valve.

The technical result is also achieved according to option 2.

In the solenoid valve according to option 2, comprising a housing with inlet and outlet nozzles, a control coil and a spring-loaded armature with a tube located inside the longitudinal channel installed inside the body, the upper end of the longitudinal channel is closed by the valve, and the upper and lower ring seals, the upper ring are installed on the tube the seal is located in the upper part of the valve to seal the upper part of the tube, the inlet pipe being connected to the channel between the valve and the upper seal, and the lower part of the tube ene lower annular seal and exits at the outlet. In the free position, the tube is preferably drawn against the valve. The solenoid valve can be equipped with a heater, which ensures stable operation of the valve at low temperatures.

In FIG. 1 shows a longitudinal section of the proposed electromagnetic valve; in FIG. 2 is a side view thereof.

In FIG. 3 shows a longitudinal section of the proposed electromagnetic valve according to option 2.

The proposed electromagnetic valve comprises a housing 1 with an inlet pipe 2 connected to the supply line, an outlet pipe 3 connected to the consumer, an outlet 4 in the form of a gap connected with the atmosphere, and an electrical connector 5. A control coil 6 and an armature 7 with a tube are installed inside the housing 1 8. The tube 8 with axial clearance and the possibility of axial movement is located inside the longitudinal channel 9, the ends of which are closed by the fixed lower 10 and upper 11 valves. In the free position, the tube 8 by means of a spring 12 mounted on the spacer ring 13 and abutting against the shoulder of the cylindrical sleeve 14, is pressed against the bottom valve 10.

On the tube 8, lower 15 and upper 16 ring seals are installed, separated by a spacer sleeve 17 and forming an annular cavity 18. Together with the walls of the channel 9, radial holes 19 are made opposite the cavity 18 in the wall of the tube 8. The inlet pipe 2 is connected to the channel 9 between the lower valve 10 and the lower seal 15. The outlet pipe 3 is connected to the annular cavity 18. The outlet 4 to the atmosphere is connected to the channel 9 between the upper valve 11 and the upper seal 16.

To enable manual operation, the proposed electromagnetic valve is equipped with a lever 20 mounted on the axis 21 and provided with a return spring 22. The lever 20 is installed in such a way that, when pressing its free end, the second end of the tube 8, compressing the spring 12, is forcibly translated into raised position against the stop in the top valve 11.

The structural elements are secured with pins 23, centering sleeves 24 and o-rings 25.

The proposed solenoid valve operates as follows.

In the normal free position (coil 6 is de-energized), the tube 8 with the armature 7 is pressed by the lower end against the lower valve 10 under the action of the spring 12. The outer diameter of the tube 8 is sealed with respect to the housing 1 by seals 15, 16. The lower valve 10 is closed.

At the same time, between the upper end of the tube 8 and the upper valve 11 there is a gap, which through outlet 4 communicates with the atmosphere. Air from the consumer through the outlet pipe 3 and the radial holes 19 enters the cavity of the tube 8 and enters the atmosphere. The upper valve 11 is open.

When the electromagnetic valve is turned on (voltage is supplied to the coil 6 through the electrical connector 5), the armature 7 with the tube 8 moves upward by electromagnetic forces, compressing the spring 12. The tube 8 abuts against the upper valve 11. The upper valve is closed by the upper end face.

At the same time, the lower end of the tube 8 leaves the lower valve 10 and the air from the supply line through the inlet pipe 2 enters the cavity of the tube 8, and from there through the radial holes 19 and the outlet pipe 3 to the consumer. The bottom valve is open.

After removing the voltage from the coil 6, the spring 12 returns the armature 7 with the tube 8 to its original position.

The electromagnetic valve can be turned on manually by holding down the lever 20. After releasing the lever 20, the electromagnetic valve goes into the normally closed position, and the lever returns to its original position under the action of the spring 22.

Thus, due to the described design, the proposed valve does not perceive axial forces from the pressure of the working medium: the pressure acts on the tube 8 radially, and the seals 15, 16 and valves 10, 11 transmit the force to the housing 1. In this case, the propulsors (coil 6 and spring 12) to move and hold the elements of the electromagnetic valve do not spend energy on overcoming the forces arising from the pressure of compressed air, which significantly increases the efficiency of the electromagnetic valve as a whole.

In FIG. 3 shows a longitudinal section of the proposed electromagnetic valve according to option 2.

The proposed electromagnetic valve comprises a housing 1 with an inlet pipe 2 connected to the supply line, and an outlet pipe 3 connected to the consumer, and an electrical connector 5. A control coil 6 and an armature 7 with a tube 8 without radial through holes are installed inside the housing 1. The tube 8 with the possibility of axial movement is located inside the longitudinal channel 9, the upper end of which is closed by a fixed valve 11. In the free position, the tube 8 by means of a spring 12 mounted on the spacer ring 13 and abutting against the lower ring seal 15 is pressed against the valve 11.

On the tube 8, lower 15 and upper 16 ring seals are installed, the upper ring seal rests on the washer 26, and the lower ring seal on the protrusion of the outlet pipe 3. The inlet pipe is connected to the cavity formed by the valve 11, the pipe 2 and the upper seal 16. The lower part of the tube 8 is connected to the outlet pipe 3.

On the outer cylindrical surface of the pipe 2, in the region of the valve 11 and the upper ring seal, a heater 27 is installed, which, in turn, is closed by a cover 28.

The structural elements are fixed with a snap ring and screw 29.

When the electromagnetic valve is turned on (voltage is supplied to the coil 6 through the electrical connector 5), the armature 7 with the tube 8 moves upward by electromagnetic forces, compressing the spring 12. The tube 8 abuts against the upper valve 11. The upper valve is closed by the upper end face.

Air from the supply line through the inlet pipe 2 enters the cavity of the tube 8, and from there into the outlet pipe 3 - to the consumer.

After removing the voltage from the coil 6, the spring 12 returns the armature 7 with the tube 8 to its original position.

Claims (5)

1. An electromagnetic valve comprising a housing with inlet and outlet nozzles and exhaust to the atmosphere, a control coil installed inside the housing and a spring-loaded armature with a tube located inside the longitudinal channel with axial clearance, characterized in that the ends of the longitudinal channel are closed by the lower and upper valves, and the lower and upper ring seals are installed on the tube, forming together with the walls of the channel an annular cavity, opposite which radial holes are made in the tube wall, and the inlet pipe n to the channel between the lower valve and the lower seal, the outlet to the cavity between the lower and upper seals, and exhaust into the atmosphere to the channel between the upper valve and the upper seal. 2. The solenoid valve according to claim 1, characterized in that in the free position the tube is pressed against the lower valve. 3. The electromagnetic valve according to claim 1, characterized in that it is equipped with a spring-loaded lever, which makes it possible to lift the tube fully into the upper valve manually. 4. An electromagnetic valve comprising a housing with inlet and outlet nozzles, a control coil installed inside the housing and a spring-loaded armature with a tube located inside the longitudinal channel with axial clearance, characterized in that the upper end of the longitudinal channel is closed by a valve, a lower ring seal is installed on the tube and the upper ring seal, while the upper ring seal is located in the upper part of the valve to seal the upper part of the tube, the inlet pipe is led to the channel between the valve and hnim seal, and the lower part of the tube is provided with a lower annular seal and is connected with an outlet. 5. The electromagnetic valve according to claim 4, characterized in that it is equipped with a heater that ensures stable operation of the valve at low temperatures.

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