CN216279675U - Pilot-operated electromagnetic valve - Google Patents

Abstract

The utility model relates to a pilot operated solenoid valve comprising a valve body having an inlet and an outlet; a valve cap coupled with the valve body and defining a first cavity inside the valve cap, the valve cap having a first channel and a first side having a second channel extending in a first direction; a valve spool movably disposed within the first cavity in the first direction; and a pilot device coupled with the bonnet and defining a second cavity with the bonnet, the pilot device including a magnetic isolation assembly and a valve stem coupled with the magnetic isolation assembly, the valve stem being movable in the first direction at least partially within the second cavity, the second cavity being in communication with the first cavity through the first passage, the second cavity being in communication with the second passage through movement of the valve stem in the first direction.

Description

Pilot-operated electromagnetic valve

Technical Field

The utility model relates to the technical field of electromagnetic valves, in particular to a pilot-operated electromagnetic valve.

Background

Solenoid valves are industrial devices that are controlled electromagnetically and are used in industrial control systems to regulate the direction, flow, velocity and other parameters of a medium. The electromagnetic valves include a plurality of direct-acting electromagnetic valves, the conventional direct-acting electromagnetic valves have limitations on the drift diameter of the electromagnetic valves, the flow rate is small, and for scenes requiring large flow rate, the direct-acting electromagnetic valves have long reaction time and low action frequency, so that the conventional direct-acting electromagnetic valves are not suitable for scenes requiring large flow rate and quick opening and closing. The pure water tank under the coal mine needs to pass through about 600L of flow per minute, and an electromagnetic valve with large flow, high opening and closing speed and high action frequency is needed.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

Therefore, an object of the present invention is to provide a pilot-operated electromagnetic valve, which controls the opening and closing of a valve core through a pilot device, so as to control the on-off of a liquid supply pipeline of a pure water tank under a coal mine. The pilot-operated electromagnetic valve is suitable for underground working scenes of coal mines requiring large flow.

The embodiment of the utility model provides a pilot-operated electromagnetic valve, which comprises: a valve body having an inlet and an outlet; a valve cap coupled with the valve body and defining a first cavity inside the valve cap, the valve cap having a first channel and a first side having a second channel extending in a first direction; a valve spool movably disposed within the first cavity in the first direction; and a pilot device coupled with the bonnet and defining a second cavity with the bonnet, the pilot device including a magnetic isolation assembly and a valve stem coupled with the magnetic isolation assembly, the valve stem being movable in the first direction at least partially within the second cavity, the second cavity being in communication with the first cavity through the first passage, the second cavity being in communication with the second passage through movement of the valve stem in the first direction.

The utility model adopts the pilot device, so that the opening and closing speed and the opening and closing frequency of the electromagnetic valve can be improved, the service power of the electromagnetic valve is reduced, and the intrinsic safety of the electromagnetic valve is ensured.

In some embodiments, the valve cover further comprises a top portion and a second side portion, the top portion being coupled at both ends to the first and second side portions, respectively, the top portion, the first side portion, and the second side portion defining the first cavity.

In some embodiments, the valve cartridge includes a third side portion, a fourth side portion, and a bottom portion, both ends of the bottom portion are coupled to the third side portion and the fourth side portion, respectively, the third side portion, the fourth side portion, and the bottom portion define a third cavity, and a side of the third cavity opposite to the bottom portion is open.

In some embodiments, the valve spool has a third passage through which the third cavity communicates with the inlet.

In some embodiments, the valve body has a fourth passage extending in the first direction, the fourth passage being communicable with the second passage.

In some embodiments, the first spring has a first end abutting the top of the valve cap and a second end abutting the bottom of the valve spool.

In some embodiments, the top of the valve cover is provided with a counterbore, and the magnetic isolation assembly comprises a first magnetic isolation ring, at least a portion of the first magnetic isolation ring enclosing the counterbore to define the second cavity.

In some embodiments, the outer circumference of the valve stem is provided with four rectangular grooves. This increases the alignment of the valve stem movement and also increases the sealing of the pilot device by allowing the aqueous medium to pass through the rectangular slot into the top opening of the valve stem.

In some embodiments, the first direction is a vertical direction.

In some embodiments, the magnetic isolation assembly is a weldment comprising a first magnetic isolation ring, a second magnetic isolation ring and a screw. Therefore, the sealing performance and the magnetic path of the pilot device can be ensured, and the magnetic force of the electromagnetic valve is improved.

According to the pilot-operated electromagnetic valve disclosed by the embodiment of the utility model, the opening and closing of the valve core are controlled through the pilot-operated device, when the pilot-operated electromagnetic valve is electrified, the valve rod in the pilot-operated device moves upwards along the vertical direction, the second cavity is communicated with the second channel, fluid in the second cavity flows into the outlet through the second channel and the fourth channel, the pressure in the first cavity is reduced, the valve core moves upwards along the vertical direction, the valve core is opened, and the fluid flows to the outlet through the inlet.

Drawings

Further features and advantages of the utility model are described in the following description, which explains the utility model in more detail on the basis of embodiments, in conjunction with the drawings.

Fig. 1 is a schematic structural diagram of a power-off state operation of a pilot-operated solenoid valve according to an embodiment of the present invention.

Fig. 2 is a partially enlarged view of a portion a in fig. 1.

FIG. 3 is a schematic diagram of a configuration of a pilot-operated solenoid valve according to an embodiment of the present invention operating in an energized state

FIG. 4 is a front view of a valve stem according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view of a valve stem according to an embodiment of the present invention.

1-valve body, 11-inlet, 12-outlet, 13-fourth channel; 2-valve cap, 21-second side, 22-first cavity, 23-top, 24-first channel, 25-second cavity, 26-counter bore, 27-second channel, 28-first side; 3-a pilot device; 4-spool, 41-third channel, 42-first annular groove, 43-third side, 44-second annular groove, 45-third cavity, 46-fourth side, 47-bottom; 5-a first spring; 6-a first seal; 7-a second seal; 8-O-shaped rings; 9-a third seal; 10-a nut; c-vertical direction; 31-a magnetic isolation component, 311-a first magnetic isolation ring, 312-a second magnetic isolation ring, 313-a screw rod; 32-a fourth seal; 33-a fifth seal; 34-valve stem, 341-opening, 342-rectangular groove; 35-a second spring; 36-a coil; 37-electromagnetic enclosure.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like as used herein are for purposes of illustration only and are not to be construed as limiting the utility model.

Referring to fig. 1 and 2, an embodiment of the present invention provides a pilot-operated solenoid valve, including: a valve body 1, said valve body 1 having an inlet 11 and an outlet 12; a bonnet 2 coupled to the valve body 1 and defining a first cavity 22 inside the bonnet 2, the bonnet 2 having a first passage 24 and a first side 28, in this embodiment the first side 28 is the right side of the valve body, the first side 28 having a second passage 27 extending in the vertical direction C; a spool 4, wherein the spool 4 is movably arranged in the first cavity 22 in the vertical direction C; and a pilot device 3, the pilot device 3 being coupled with the bonnet 2 and defining a second cavity 25 with the bonnet 2, the pilot device 3 comprising a magnetic barrier assembly 31 and a valve stem 34 coupled with the magnetic barrier assembly 31, the valve stem 34 being movable in the vertical direction C at least partially within the second cavity 25, the second cavity 25 being in communication with the first cavity 22 through the first passage 24, the second cavity 25 being in communication with the second passage 27 through movement of the valve stem 34 in the vertical direction C.

In some embodiments, the bonnet 2 further comprises a top portion 23 and a second side portion 21, in this embodiment, the second side portion 21 is a left side portion of the valve body, two ends of the top portion 23 are respectively coupled to the first side portion 28 and the second side portion 21, and the top portion 23, the first side portion 28 and the second side portion 21 define the first cavity 22.

A first passage 24 is located at the junction of the top portion 23 and the first side portion 27 for communicating the first cavity 22 with the second cavity 25.

In some embodiments, the valve core 4 includes a third side portion 43, a fourth side portion 46 and a bottom portion 47, in this embodiment, the third side portion 43 and the fourth side portion 46 are respectively a left side portion and a right side portion of the valve core, two ends of the bottom portion 47 are respectively coupled to the third side portion 43 and the fourth side portion 46, the third side portion 43, the fourth side portion 46 and the bottom portion 47 define a third cavity 45, and a side of the third cavity 45 opposite to the bottom portion 47 is open. The first chamber 22 communicates with the third chamber 45.

In some embodiments, the valve core 4 has a third channel 41, in this embodiment, the third channel 41 is located at the junction of the bottom 47 and the third side 43, and the third cavity 45 is communicated with the inlet 11 through the third channel 41. Thus, the fluid pressure within the third chamber 45 corresponds to the fluid pressure of the inlet 11.

In some embodiments, the valve body 1 has a fourth channel 13 extending in the vertical direction C, the fourth channel 13 being communicable with the second channel 27. In the embodiment, the fourth channel 13 is located on the same side of the valve body 1 as the valve cover 2, specifically, the fourth channel 13 is located on the right side part of the valve body, and the joint of the second channel 27 and the fourth channel 13 is provided with an O-ring 8 to ensure the tightness of the joint and prevent leakage.

In some embodiments, the pilot operated solenoid valve further comprises a first spring 5, the first spring 5 having a first end 51 and a second end 52, the first end 51 abutting the top portion 23 of the bonnet 2, the second end 52 abutting the bottom portion 47 of the spool 4. Thereby, the first spring 5 has a function of urging the valve element 4 to return.

In some embodiments, the top portion 23 of the valve cover 2 is provided with a counterbore 26, and the magnetic isolation assembly 31 includes a magnetic isolation lower ring 311 (as an example of a first magnetic isolation ring), at least a portion of the magnetic isolation lower ring 311 enclosing the counterbore 26 to define the second cavity 25. As shown in fig. 2, in the present embodiment, a fourth sealing member 32 is disposed at a connection position of the top portion 23 of the bonnet 2 and the magnetic isolation lower ring 311 to ensure the sealing performance of the connection position and prevent leakage.

In some embodiments, as shown in fig. 4 and 5, the valve stem 34 is provided with four rectangular grooves 342 on its outer periphery to increase the centering of the movement of the valve stem 34 and also to allow fluid to pass through the rectangular grooves 342 into the valve stem top opening 341 to increase the sealing of the pilot device.

In some embodiments, the magnetic isolation assembly 31 is a weldment including a magnetic isolation lower ring 311 (as an example of a first magnetic isolation ring), a magnetic isolation upper ring 312 (as an example of a second magnetic isolation ring), and a screw 313. Thus, the magnetic isolation assembly 31 is integrated to effectively isolate magnetic field.

According to the pilot-operated solenoid valve of the embodiment of the utility model, the opening and closing of the valve core 4 are controlled by the pilot device 3, when the pilot-operated solenoid valve is electrified, the valve rod 34 in the pilot device 3 moves upwards along the vertical direction C, the second cavity 25 is communicated with the second channel 27, fluid in the second cavity 25 flows into the outlet 12 through the second channel 27 and the fourth channel 13, the pressure in the first cavity 22 is reduced, the valve core 4 moves upwards along the vertical direction C, the valve core 4 is opened, and the fluid flows to the outlet 12 through the inlet 11.

In some embodiments, as shown in fig. 1, the valve spool 4 has a first annular groove 42 and a second annular groove 44, the first annular groove 42 being provided with the second seal 7, and the second annular groove 44 being provided with the first seal 6. In this embodiment, the bottom 47 of the valve core 4 is embedded with the third sealing member 9 and fixed by the nut 10.

In some embodiments, as shown in fig. 2, the pilot device 3 further comprises an electromagnetic housing 37, a coil 36, and a second spring 35. A magnetic isolation assembly 31, a valve rod 34 and a second spring 35 are arranged in a cavity of the electromagnetic shell 37, and a coil 36 is sleeved in a shell of the electromagnetic shell 37; the top end of the second spring 35 abuts against the bottom of the screw 313, and the bottom end of the second spring is embedded into the top opening 341 of the valve stem 34 for driving the resetting of the valve stem 34. In this embodiment, the bottom of the valve stem 34 is embedded with a fifth sealing member 33 for ensuring the sealing property at the connection between the valve stem 34 and the second channel 27 and preventing leakage.

Fig. 1 shows an operating state when the pilot type solenoid valve is not energized. The first chamber 22 communicates with the second chamber 25 through the first passage 24, the third chamber 45 communicates with the inlet 11 through the third passage 41, and the first chamber 22 communicates with the third chamber 45, so that the fluid pressures in the four chambers are the same in the initial state. However, the fluid in the first, 22 and third cavities 45 can act on the openings of the third side 43, the fourth side 46 and the bottom 47 of the valve core 4, and the fluid in the inlet 11 acts on the third side 43 only, so the acting area of the top of the valve core 4 is large, and the larger the thrust of the acting area is under the same pressure, that is, the thrust generated by the fluid pressure in the first cavity 22 and the third cavity 45 is large, the valve core 4 is closed with the valve body 1, and the inlet 11 and the outlet 12 are blocked.

As shown in fig. 3, when the pilot-operated solenoid valve is energized, the coil 36 is energized, the screw 313 in the magnetic isolation assembly 31 has magnetic force to lift the valve rod 34, the fifth seal 33 embedded in the bottom of the valve rod 34 moves up along with the valve rod 34, the second cavity 25 is communicated with the second channel 27, the fluid in the second cavity 25 flows into the outlet 12 through the second channel 27 and the fourth channel 13, the pressure in the first cavity 22 is indirectly relieved, the pressure of the fluid in the inlet 11 is greater than that in the first cavity 22, the fluid pushes the valve element 4 to move up in the vertical direction C under the action of the pressure difference, the third seal 9 embedded in the bottom 47 of the valve element 4 moves up along with the pressure, the inlet 11 is communicated with the outlet 12, and the fluid flows into the outlet 12 from the inlet 11. When the pilot-operated solenoid valve is powered off again, the valve rod 34 is reset under the combined action of the second spring 35 and the fluid pressure at the top of the valve rod 34, the valve rod 34 abuts against the second channel 27, the second channel 27 is closed, the pressure in the first cavity 22 is increased until the pressure is consistent with the pressure of the inlet 11, the valve core 4 moves downwards along the vertical direction C under the action of the first spring 5, the valve core 4 is closed, and the inlet 11 and the outlet 12 are isolated.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by one skilled in the art.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. A pilot operated solenoid valve characterized by: comprises that

A valve body having an inlet and an outlet;

a valve cap coupled with the valve body and defining a first cavity inside the valve cap, the valve cap having a first channel and a first side having a second channel extending in a first direction;

a valve spool movably disposed within the first cavity in the first direction; and

a pilot device coupled with the bonnet and defining a second cavity with the bonnet, the pilot device including a magnetic isolation assembly and a valve stem coupled with the magnetic isolation assembly, the valve stem being movable in the first direction at least partially within the second cavity, the second cavity being in communication with the first cavity through the first passage, the second cavity being in communication with the second passage through movement of the valve stem in the first direction.

2. The pilot operated solenoid valve of claim 1 wherein the bonnet further comprises a top portion and a second side portion, the top portion coupled at opposite ends to the first and second side portions, respectively, the top portion, first side portion, and second side portion defining the first cavity.

3. The pilot operated solenoid valve of claim 2 wherein the spool comprises a third side, a fourth side, and a bottom, the bottom coupled at each end to the third and fourth sides, respectively, the third, fourth, and bottom defining a third cavity, the third cavity being open on a side opposite the bottom.

4. The pilot operated solenoid valve of claim 3 wherein said spool has a third passage through which said third chamber communicates with said inlet.

5. The pilot operated solenoid valve of claim 1 wherein the valve body has a fourth passage extending in the first direction, the fourth passage being communicable with the second passage.

6. The pilot operated solenoid valve of claim 3 further comprising a first spring having a first end abutting the top of the bonnet and a second end abutting the bottom of the spool.

7. The pilot operated solenoid valve of claim 1 wherein said top of said valve cover is provided with a counterbore and said magnetic shield assembly comprises a first magnetic shield, at least a portion of said first magnetic shield enclosing said counterbore to define said second cavity.

8. The pilot operated solenoid valve according to claim 1, wherein the outer circumference of the valve stem is provided with four rectangular grooves.

9. The pilot operated solenoid valve of claim 1 wherein the first direction is a vertical direction.

10. The pilot operated solenoid valve of claim 1, wherein the flux barrier assembly is a weldment comprising a first flux barrier ring, a second flux barrier ring, and a screw.

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