Plug-in type flow direction switching electromagnetic valve

Abstract

The utility model belongs to the technical field of electromagnetic valves, and discloses a plug-in type flow direction switching electromagnetic valve which comprises a shell, a large valve element, a large valve seat, a small valve element and a small valve seat. When the electromagnetic valve is powered on, the large valve element and the large valve seat are separated, the small valve element and the small valve seat are closed, and a port A in the shell is communicated with a port B between the large valve seat and the small valve seat. When the electromagnetic valve is powered off, the large valve element and the large valve seat are closed, the small valve element and the small valve seat are separated, and the port B is communicated with the port C between the small valve element and the small valve seat. A large-small valve core combined structure is adopted, and valve cavities formed by the large valve core combined structure, the large valve seat and the small valve seat in a sealing mode correspond to two channels when the electromagnetic valve is opened and closed respectively. When the electromagnetic valve is powered on, the A-B direction oil way can be opened, and the B-C direction oil way can be closed. When the electromagnetic valve is powered off, the A-B direction oil way is disconnected, meanwhile, the B-C direction oil way is opened, and oil reversing is achieved. According to the structural design of the electromagnetic valve, the machining difficulty of the valve element and the valve seat is reduced, and the production efficiency of products is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of solenoid valves and relates to a flow tangential solenoid valve, in particular to a plug-in flow direction switching solenoid valve. Background Art

[0002] In engine oil systems, two-position, three-way solenoid valves are often used to control the flow of oil, both on and off, and to change the direction of oil flow, depending on the engine's operating status. Common two-position, three-way solenoid valves primarily control the movement of the valve core, causing the stepped shaft of the valve core to contact or separate with the upper and lower valve seats to achieve oil flow direction. Therefore, the stepped shaft valve core must simultaneously meet sealing requirements with both the upper and lower valve seats, as well as dynamic sealing during operation. This places high demands on the structure and precision of the valve core and valve seat, resulting in low production efficiency. Utility Model Content

[0003] To address the above issues, the present invention provides a plug-in flow direction switching solenoid valve that uses a large-small valve core combination structure to seal the upper and lower valve seats, respectively, to achieve oil circuit switching. This structural design reduces the difficulty of machining the valve core and valve seat, thereby improving product production efficiency.

[0004] The technical solution of the utility model is as follows:

[0005] A plug-in flow direction switching solenoid valve includes a shell, a large valve core, a large valve seat, a small valve core and a small valve seat, wherein the large valve core and the small valve core are connected up and down; when the solenoid valve is energized, the large valve core and the large valve seat are separated, the small valve core and the small valve seat are closed, and the A port on the shell is connected to the B port between the large valve seat and the small valve seat; when the solenoid valve is de-energized, the large valve core and the large valve seat are closed, the small valve core and the small valve seat are separated, and the B port is connected to the C port between the small valve core and the small valve seat.

[0006] Furthermore, the upper portion of the housing includes a coil frame and a moving iron core, and the moving iron core is connected to the large valve core via a pin.

[0007] Furthermore, the large valve seat and the small valve seat are installed in the shell, the top of the small valve core is fixedly connected to the bottom of the large valve core, and the small valve core passes through the oil hole of the large valve seat.

[0008] Furthermore, the large valve seat and the large valve core have conical surfaces that fit together, and the small valve core and the small valve seat have conical surfaces that fit together.

[0009] Furthermore, a blocking cover is provided on the top of the shell, and a first sealing ring is provided on the sealing surface of the blocking cover.

[0010] Furthermore, the large valve core is provided with a transverse through-hole structure at the position corresponding to the port A of the shell.

[0011] The technical effects of the utility model are as follows:

[0012] This plug-in flow switching solenoid valve utilizes a large-small valve core combination. The valve cavity, sealed with large and small valve seats, corresponds to the two channels for the solenoid valve's on and off states, respectively. When the solenoid valve is energized, it opens the AB oil path and closes the BC oil path. When de-energized, the AB oil path is disconnected while the BC oil path is opened, achieving oil flow switching. This solenoid valve structural design simplifies the machining of the valve core and valve seat, improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 This is a schematic structural diagram of a plug-in flow direction switching solenoid valve of the utility model;

[0015] Figure 2 This is a schematic diagram of the lubricating oil flow direction of a plug-in flow direction switching solenoid valve of the utility model (when the solenoid valve is energized);

[0016] Figure 3 This is a schematic diagram of the lubricating oil flow direction of a plug-in flow direction switching solenoid valve of the utility model (when the solenoid valve is powered off);

[0017] Figure 4 This is a schematic diagram of the small valve seat structure of an insert-type flow direction switching solenoid valve of the utility model;

[0018] Figure 5 This is a schematic diagram of the housing structure of a plug-in flow direction switching solenoid valve of the utility model;

[0019] Among them, 1—housing, 2—blocking cover, 3—first sealing ring, 4—coil frame, 5—moving iron core, 6—second sealing ring, 7—third sealing ring, 8—pin, 9—large valve core, 10—large valve seat, 11—small valve core, 12—small valve seat, 13—fourth sealing ring, 14—fifth sealing ring, 15—sixth sealing ring, 16—spring, 17—socket. DETAILED DESCRIPTION

[0020] This section is an embodiment of the present invention, which is used to explain and illustrate the technical solution of the present invention. In the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating directions or positional relationships are based on the orientations or positional relationships in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or case referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implying the number of technical features indicated. Therefore, features defined as "first", "second" and the like may explicitly or implicitly include more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0022] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integrated connections; mechanical connections, point connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0023] Example 1:

[0024] A plug-in flow direction switching solenoid valve includes a shell 1, a large valve core 9, a large valve seat 10, a small valve core 11 and a small valve seat 12, wherein the large valve core 9 and the small valve core 11 are connected up and down; when the solenoid valve is energized, the large valve core 9 and the large valve seat 10 are separated, the small valve core 11 and the small valve seat 12 are closed, and the A port on the shell 1 is connected to the B port between the large valve seat 10 and the small valve seat 12; when the solenoid valve is de-energized, the large valve core 9 and the large valve seat 10 are closed, the small valve core 11 and the small valve seat 12 are separated, and the B port is connected to the C port between the small valve core 11 and the small valve seat 12.

[0025] The upper portion of the housing 1 includes a coil frame 4 and a moving iron core 5 , and the moving iron core 5 is connected to a large valve core 9 via a pin 8 .

[0026] The large valve seat 10 and the small valve seat 12 are installed in the housing 1 . The top of the small valve core 11 is fixedly connected to the bottom of the large valve core 9 , and the small valve core 11 passes through the oil hole of the large valve seat 10 .

[0027] The large valve seat 10 and the large valve core 9 are conically matched, and the small valve core 11 and the small valve seat 12 are conically matched.

[0028] A blocking cover 2 is further provided on the top of the housing 1 , and a first sealing ring 3 is provided on the sealing surface of the blocking cover 2 .

[0029] The large valve core 9 is provided with a transverse through-hole structure at the position corresponding to the opening of the housing 1A.

[0030] Example 2:

[0031] The utility model provides a plug-in flow direction switching solenoid valve structure, which adopts a large-small valve core combination structure to seal with the upper and lower valve seats respectively to achieve oil circuit switching. This structural design reduces the difficulty of processing the valve core and valve seat, and improves product production efficiency.

[0032] A plug-in flow direction switching solenoid valve includes: a housing 1, a plug cover 2, a sealing ring 3, a coil frame 4, a moving iron core 5, a sealing ring 6, a sealing ring 7, a pin 8, a large valve core 9, a large valve seat 10, a small valve core 11, a small valve seat 12, a sealing ring 13, a sealing ring 14, a sealing ring 15, a spring 16, and a socket 17.

[0033] The coil frame 4 is placed in the cavity of the shell 1, and the lower end face of the coil frame 4 contacts the end face of the shell 1 through the sealing ring 6, and the upper end face of the coil frame 4 contacts the end face of the plug cover 2 through the sealing ring 3; the plug cover 2 is placed in the cavity of the coil frame 4 and fixed to the shell 1 through threads; the movable iron core 5 is placed in the cavity of the coil frame 4 and connected to the plug cover 2 through a spring 16; the movable iron core 5 and the large valve core 9 are fixed by a pin 8; the large valve core 9 is threadedly connected to the small valve core 11; the large valve seat 10 is placed in the cavity of the shell 1 and connected to the shell 1 through threads and a sealing ring 14; the large valve seat 10 and the small valve seat 12 are fixed by threads;

[0034] In a possible embodiment, there is a gap between the movable iron core 5 and the blocking cover 2. When the solenoid valve is energized, the movable iron core 5 moves upward and directly contacts the blocking cover 2. When the solenoid valve is de-energized, the electromagnetic force disappears, and the movable iron core 5 moves downward back to its original position and separates from the blocking cover 2.

[0035] In one possible embodiment, the upper end of the large valve seat 10 is sealed with the conical surface of the large valve core 9. When the solenoid valve is energized, the movable iron core 5 drives the large valve core 9 to move upward, and the upper end of the large valve seat 10 is separated from the contact conical surface of the large valve core 9, allowing oil to flow through the gap; when the solenoid valve is de-energized, the electromagnetic force disappears, and the movable iron core 5 drives the large valve core 9 to move downward back to its original position. The upper end of the large valve seat 10 contacts the conical surface of the large valve core 9, and oil cannot pass through.

[0036] In one possible embodiment, the lower end of the small valve seat 12 is sealed with the conical surface of the small valve core 11. When the solenoid valve is energized, the large valve core 9 drives the small valve core 11 to move upward, and the lower end of the small valve seat 12 contacts the conical surfaces of the large and small valve cores 11, preventing oil from passing through. When the solenoid valve is de-energized, the electromagnetic force disappears, and the large valve core 9 drives the small valve core 11 to move downward back to its original position. The lower end of the small valve seat 12 is separated from the contact conical surface of the large valve core 9, allowing oil to flow through the gap.

[0037] In one possible embodiment, the housing 1 is provided with six annular through holes evenly distributed at the oil inlet, and a small through hole is provided in the large valve core 9 corresponding to the center of the annular hole; a groove structure is added to the six annular through holes of the housing 1 to increase the oil flow area and reduce the oil flow resistance;

[0038] In a possible embodiment, four groove flow channels are evenly distributed on the outer circumference of the small valve seat 12, which form a lubricating oil channel after being connected to the large valve seat 10;

[0039] In a possible embodiment, a flange and two sealing structures (sealing ring 7 and sealing ring 15) are provided on the housing 1, and are connected to other products or pipelines through bolts on the flange holes.

[0040] First, a plug-in flow direction switching solenoid valve is proposed. The valve cavity formed by the large and small valve seats corresponds to the two channels of the solenoid valve when it is on and off. When the power is on, it can open the A and B oil paths and simultaneously cut off the B and C oil paths. When the power is off, it can cut off the A and B oil paths and simultaneously switch the oil direction to flow in the B and C directions.

[0041] Secondly, a through-hole structure is designed at the center position of the large valve core corresponding to the housing lubricating oil inlet.

[0042] Thirdly, a groove flow channel is provided on the outer circumferential surface of the small valve seat, which forms a lubricating oil channel after being connected with the large valve seat.

[0043] Fourthly, a groove structure is added to the six annular through holes at the oil inlet of the casing to increase the oil flow area and reduce the oil flow resistance.

[0044] Example 3:

[0045] The solenoid valve uses a combined structure of large and small valve cores connected together, which are sealed with large and small valve seats to form a valve cavity, corresponding to the two channels when the solenoid valve is on and off. When the solenoid valve is energized, the moving iron core moves upward, driving the large valve core to open upward, allowing oil to flow in from inlet A and out through outlet B. At the same time, the small valve core also moves upward, closing the oil path from inlet B to outlet C. When the solenoid valve is de-energized, the electromagnetic force disappears, and the large valve core returns to its original position under the action of the spring, closing the oil path from inlet A to outlet B. At the same time, the small valve core also returns to its original position, opening the oil path from inlet B to outlet C, achieving oil reversal.

[0046] Line seals are used between the large valve core and the large valve seat, and between the small valve core and the small valve seat. This structure has good sealing performance and requires low machining accuracy of the contact surface between the valve core and the valve seat;

[0047] A through hole is provided on the large valve core. The through hole corresponds to the center of the oil inlet annular hole in the housing and has a diameter of 1mm. This structure can balance the pressure of the cavities on both sides of the valve core, avoiding pressure buildup during valve core installation and facilitating assembly.

[0048] Four uniform grooves are machined on the outer surface of the small valve seat, connecting to the large valve seat to form the oil channel. This groove channel structure is easy to machine on the outside of the part and can realize different flow patterns of oil channels;

[0049] Adding grooves to the six annular through holes at the oil inlet of the casing can increase the oil flow area and reduce the oil flow resistance.

[0050] The moving iron core and shell of the solenoid valve are both made of high-temperature resistant magnetic conductive material 1J22. This material has a high saturation magnetic induction intensity and can generate a large attractive force under the same cross-sectional area, reducing the size of the solenoid valve. At the same time, due to its high Curie point, this material can operate at higher temperatures where other soft magnetic materials have been completely demagnetized and maintain good magnetic stability.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present invention, and these modifications or replacements should all be included in the protection scope of the present invention.

Claims

1. A plug-in flow direction switching solenoid valve, characterized in that: The invention comprises a housing (1), a large valve core (9), a large valve seat (10), a small valve core (11) and a small valve seat (12), wherein the large valve core (9) and the small valve core (11) are connected up and down; when the solenoid valve is energized, the large valve core (9) and the large valve seat (10) are separated, the small valve core (11) and the small valve seat (12) are closed, and the port A on the housing (1) is connected to the port B between the large valve seat (10) and the small valve seat (12); when the solenoid valve is de-energized, the large valve core (9) and the large valve seat (10) are closed, the small valve core (11) and the small valve seat (12) are separated, and the port B is connected to the port C between the small valve core (11) and the small valve seat (12).

2. The plug-in flow direction switching solenoid valve according to claim 1, characterized in that: The upper portion of the housing (1) includes a coil frame (4) and a moving iron core (5), and the moving iron core (5) is connected to a large valve core (9) via a pin (8).

3. The plug-in flow direction switching solenoid valve according to claim 1, characterized in that: The large valve seat (10) and the small valve seat (12) are installed in the housing (1), the top of the small valve core (11) is fixedly connected to the bottom of the large valve core (9), and the small valve core (11) passes through the oil hole of the large valve seat (10).

4. The plug-in flow direction switching solenoid valve according to claim 1, characterized in that: The large valve seat (10) and the large valve core (9) are conically matched, and the small valve core (11) and the small valve seat (12) are conically matched.

5. The plug-in flow direction switching solenoid valve according to claim 1, characterized in that: A blocking cover (2) is also provided on the top of the shell (1), and a first sealing ring (3) is provided on the sealing surface of the blocking cover (2).

6. The plug-in flow direction switching solenoid valve according to claim 1, characterized in that: The large valve core (9) is provided with a transverse through-hole structure at the position corresponding to the A port of the housing (1).

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