Small plug-in mounting electromagnetic valve

Abstract

The utility model provides a small-sized cartridge solenoid valve which comprises a valve casing, an electromagnet assembly and an armature, an upper movable cavity and a compression spring are arranged between the armature and the electromagnet assembly, the armature is connected with a valve rod, the lower end of the valve casing is connected with a valve sleeve, a lower movable cavity is arranged between the valve sleeve and the armature, and the lower movable cavity is communicated with the upper movable cavity through a first guide hole. A valve cavity is formed in the valve sleeve, a temporary storage cavity and an inlet are formed in the lower end of the valve cavity, the valve rod abuts against the inlet in a sealed mode, an outlet communicated with the temporary storage cavity is formed in the valve sleeve, a second guide hole is formed in the valve sleeve, the outlet is communicated with the lower movable cavity through the second guide hole, and an ejector pin abutting against the second guide hole in a sealed mode is fixed to the lower end of the armature. And the inlet is communicated with the lower movable cavity through a pilot through hole. The upper movable cavity and the lower movable cavity are communicated, so that the moving resistance of the armature is reduced; a core sleeve and a spring of the valve core are omitted, the size of the electromagnetic valve is reduced, and the inlet can be directly opened after the armature drives the valve rod to move upwards.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valves, in particular to a small-sized plug-in electromagnetic valve. Background Art

[0002] The movable cavity of the existing plug-in solenoid valve armature is mostly a closed cavity. When the armature moves up and down, the volume of the movable cavity on both sides of the armature changes, and then the pressure in the cavity changes, resulting in a large resistance to the movement of the armature. How to reduce the resistance to the movement of the armature is one of the problems that need to be solved.

[0003] In addition, the existing plug-in solenoid valves are mostly provided with a pilot hole and a valve core, the valve core includes a core sleeve, a valve stem and a spring are arranged in the core sleeve, a pressure relief port communicating with the outlet is arranged at the lower end of the core sleeve, and a pilot hole communicating with the inlet is arranged on the side wall of the core sleeve. This structure has the following problems: 1. The valve core includes a core sleeve, a spring and a valve stem, which is not conducive to the miniaturization of the solenoid valve; 2. After the solenoid valve is energized, the valve stem moves up, the pressure relief port opens, the medium enters the core sleeve through the inlet and the pilot hole, and enters the outlet through the pressure relief port, and then the medium overcomes the pressure of the valve core spring to push the core sleeve up to open the outlet, which is not convenient for realizing the rapid opening of the solenoid valve and realizing rapid unloading. Utility Model Content

[0004] The utility model provides a small plug-in solenoid valve, which makes the upper and lower movable chambers communicate with each other, reduces the resistance of the armature movement, saves the core sleeve and spring of the valve core, reduces the size of the whole solenoid valve, and after the armature drives the valve stem to move upward, the inlet can be directly opened, which is conducive to rapid unloading.

[0005] The technical solution of the utility model is achieved as follows: a small plug-in solenoid valve comprises a valve housing, an electromagnet assembly and an armature are arranged at the upper end of the valve housing, an upper movable chamber is arranged between the armature and the electromagnet assembly, a compression spring is arranged in the upper movable chamber, a vertical valve stem is arranged in the valve housing, the upper end of the valve stem is connected to the armature, a valve sleeve is screwed at the lower end of the valve housing, a lower movable chamber is arranged between the valve sleeve and the armature, a first guide hole is arranged in the armature, the lower movable chamber and the upper movable chamber are communicated through the first guide hole, a vertical valve chamber is arranged in the valve sleeve, a temporary storage chamber and an inlet are arranged at the lower end of the valve chamber in sequence, an outlet communicated with the temporary storage chamber is arranged on the valve sleeve, a second guide hole is also arranged in the valve sleeve, the outlet is communicated with the lower movable chamber through the second guide hole, a pin sealed against the second guide hole is fixed at the lower end of the armature, the valve stem passes through the valve chamber and the temporary storage chamber, and is sealed against the inlet, a pilot through hole is arranged in the valve stem, the lower end of the pilot through hole is communicated with the inlet, and the upper end is communicated with the lower movable chamber.

[0006] Further, the second guide hole is arranged vertically and located on the upper side of the outlet, the first guide hole is arranged obliquely, and the first guide hole and the second guide hole are respectively located on both sides of the valve stem.

[0007] Furthermore, a plug is threadedly connected to the lower end of the valve sleeve, the shaft through hole in the plug is the inlet, and the lower end of the valve stem is a tapered end, which is sealed against the upper end of the inlet.

[0008] Furthermore, the electromagnet assembly includes a shell, in which a stop iron is fixed, and a mounting groove communicating with the upper movable cavity is provided in the stop iron. The upper end of the compression spring is placed in the mounting groove, and the lower end is against the armature. A coil is provided on the outside of the stop iron, and a magnetic isolation ring is provided between the upper movable cavity and the coil.

[0009] Furthermore, the upper movable chamber, the valve chamber, the lower movable chamber and the inlet are coaxially arranged.

[0010] Beneficial effects of the utility model:

[0011] The utility model pushes the armature and the valve stem to move by means of a compression spring, and the armature and the valve stem are sealed against the inlet, thereby closing the inlet; the upper movable chamber and the lower movable chamber of the armature are both communicated with the inlet by means of the setting of the pilot through hole and the first guide hole, and when the armature moves up and down, the movable chambers on both sides thereof are communicated with each other, thereby reducing the resistance to the movement of the armature; through the cooperation of the second guide hole and the ejector pin, after the armature moves up, the lower movable chamber is communicated with the outlet, thereby facilitating the discharge of the medium in the upper movable chamber and the lower movable chamber. Through the above structure, the core sleeve and the spring of the valve core are omitted, which is conducive to simplifying the structure and reducing the size of the entire solenoid valve, and after the armature drives the valve stem to move up, the inlet can be directly opened. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is a schematic diagram of the structure of the electromagnet assembly.

[0015] Valve housing 1, electromagnet assembly 2, shell 3, stop iron 4, coil 5, magnetic isolation ring 6, armature 7, upper movable chamber 8, compression spring 9, mounting groove 10, valve stem 11, valve sleeve 12, lower movable chamber 13, first guide hole 14, ejector pin 15, valve chamber 16, temporary storage chamber 17, plug 18, inlet 19, pilot through hole 20, outlet 21, second guide hole 22. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] like Figure 1 and 2 As shown, a small plug-in solenoid valve comprises a valve housing 1, an electromagnet assembly 2 is fixed at the upper end of the valve housing 1, the electromagnet assembly 2 comprises a housing 3, a stopper 4 is fixed in the housing 3, a coil 5 is fixed outside the stopper 4, an armature 7 is provided below the stopper 4, an upper movable chamber 8 is provided between the armature 7 and the stopper 4, and a magnetic isolation ring 6 is fixed between the upper movable chamber 8 and the coil 5. A vertical compression spring 9 is provided in the upper movable chamber 8, a mounting groove 10 communicating with the upper movable chamber 8 is provided in the stopper 4, the upper end of the compression spring 9 is placed in the mounting groove 10, and the lower end abuts against the armature 7.

[0018] A vertical valve stem 11 is arranged in the valve housing 1, the upper end of the valve stem 11 is fixedly connected to the armature 7, a valve sleeve 12 is screwed to the lower end of the valve housing 1, and a lower movable chamber 13 is arranged between the valve sleeve 12 and the armature 7. When the armature 7 moves downward, the volume of the lower movable chamber 13 decreases, and the volume of the upper movable chamber 8 increases. When the armature 7 moves upward, the volume of the upper movable chamber 8 decreases, and the volume of the lower movable chamber 13 increases. A first guide hole 14 is arranged in the armature 7, and the lower movable chamber 13 and the upper movable chamber 8 are communicated through the first guide hole 14.

[0019] A vertical valve cavity 16 is provided in the valve sleeve 12, and a temporary storage cavity 17 is provided at the lower end of the valve cavity 16. The inner diameter of the temporary storage cavity 17 is larger than that of the valve cavity 16. A plug 18 is screwed at the lower end of the valve sleeve 12, and a vertical inlet 19 is provided in the plug 18. The lower end of the valve stem 11 is a tapered end, and the tapered end is sealed against the upper end of the inlet 19. A pilot through hole 20 is provided in the valve stem 11, and the lower end of the pilot through hole 20 is communicated with the inlet 19, and the upper end of the pilot through hole 20 is communicated with the lower active cavity 13. The upper active cavity 8, the lower active cavity 13, the valve cavity 16, the temporary storage cavity 17 and the inlet 19 are coaxially arranged.

[0020] The valve sleeve 12 is provided with an outlet 21 communicating with the temporary storage chamber 17. There may be multiple outlets 21, which are evenly distributed along the circumference of the temporary storage chamber 17. The valve sleeve 12 is also provided with a second guide hole 22, which is arranged vertically and located on the upper side of an outlet 21. The outlet 21 is communicated with the lower active chamber 13 through the second guide hole 22. The first guide hole 14 is arranged obliquely, and the first guide hole 14 and the second guide hole 22 are respectively located on both sides of the valve stem 11. The lower end of the armature 7 is fixed with a pin 15 for closing the second guide hole 22. When the armature 7 moves downward, the lower end of the pin 15 is sealed against the upper end of the second guide hole 22. When the armature 7 moves upward, the upper end of the second guide hole 22 is opened, and the lower active chamber 13 is communicated with the outlet 21.

[0021] The method of using the small plug-in solenoid valve is as follows: the medium enters the lower active chamber 13 through the inlet 19 and the pilot hole 20, and then enters the upper active chamber 8 through the lower active chamber 13 and the first guide hole 14. The lower active chamber 13 is connected to the upper active chamber 8 and is connected to the inlet 19. The electromagnet assembly 2 is powered off, and the armature 7 and the valve stem 11 are pushed downward by the compression spring 9, and are sealed against the inlet 19; after the electromagnet assembly 2 is powered on, the armature 7 drives the valve stem 11 to move upward, the inlet 19 and the second guide hole 22 are opened, and the medium is discharged through the inlet 19, the temporary storage chamber 17 and the outlet 21; the medium in the upper active chamber 8 and the lower active chamber 13 is discharged through the second guide hole 22 and the outlet 21.

[0022] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A small plug-in solenoid valve, comprising a valve housing, an electromagnet assembly and an armature are arranged at the upper end of the valve housing, an upper movable chamber is arranged between the armature and the electromagnet assembly, a compression spring is arranged in the upper movable chamber, a vertical valve stem is arranged in the valve housing, the upper end of the valve stem is connected to the armature, a valve sleeve is screwed at the lower end of the valve housing, a lower movable chamber is arranged between the valve sleeve and the armature, and the characteristics are: A first guide hole is provided in the armature, and the lower movable chamber and the upper movable chamber are communicated with each other through the first guide hole. A vertical valve chamber is provided in the valve sleeve, and a temporary storage chamber and an inlet are provided at the lower end of the valve chamber in sequence. An outlet communicated with the temporary storage chamber is provided on the valve sleeve, and a second guide hole is also provided in the valve sleeve, and the outlet communicates with the lower movable chamber through the second guide hole. A pin that is sealed against the second guide hole is fixed at the lower end of the armature, and the valve stem passes through the valve chamber and the temporary storage chamber and is sealed against the inlet. A pilot through hole is provided in the valve stem, and the lower end of the pilot through hole is communicated with the inlet, and the upper end is communicated with the lower movable chamber.

2. A small cartridge solenoid valve according to claim 1, characterized in that: The second guide hole is arranged vertically and located at the upper side of the outlet, the first guide hole is arranged obliquely, and the first guide hole and the second guide hole are respectively located at two sides of the valve stem.

3. A small cartridge solenoid valve according to claim 1 or 2, characterized in that: The lower end of the valve sleeve is threaded with a plug, the shaft through hole in the plug is the inlet, the lower end of the valve stem is a tapered end, and the tapered end is sealed against the upper end of the inlet.

4. A small cartridge solenoid valve according to claim 1, characterized in that: The electromagnet assembly includes a shell, a stop iron is fixed in the shell, a mounting groove communicating with the upper movable cavity is arranged in the stop iron, the upper end of the compression spring is placed in the mounting groove, and the lower end is against the armature, a coil is arranged on the outside of the stop iron, and a magnetic isolation ring is arranged between the upper movable cavity and the coil.

5. The small cartridge solenoid valve according to claim 1, characterized in that: The upper movable chamber, the lower movable chamber, the valve chamber and the inlet are coaxially arranged.

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