A two-position three-way solenoid valve

Abstract

The utility model relates to solenoid valve technical field, concretely relates to a two-position three-way solenoid valve, including valve body and valve core, valve body sets up intercommunication liquid inlet, first liquid outlet and second liquid outlet, and the first spherical groove is formed in the middle of liquid inlet and first liquid outlet, and the second spherical groove is formed in the middle of liquid inlet and second liquid outlet, valve core forms two interval settings spherical surface, one spherical surface can be pasted with corresponding side's first spherical groove or second spherical groove, and simultaneously, the other spherical surface has the gap with corresponding side's second spherical groove or first spherical groove, and the side of first spherical groove and second spherical groove and spherical surface contact is formed with sealing edge, one end of valve body is equipped with electromagnet assembly, and the other end is equipped with pressure detection assembly, when the spherical surface on valve core and corresponding side's first spherical groove or second spherical groove's sealing edge contact, even if first spherical groove or second spherical groove's sealing edge and spherical surface exist tiny size deviation, spherical surface still can be closely contacted with sealing edge.

Description

Technical Field

[0001] This utility model belongs to the field of electromagnetic valve technology, specifically a two-position three-way electromagnetic valve. Background Technology

[0002] In fluid control systems, two-position three-way solenoid valves are widely used in automation equipment, hydraulic systems, pneumatic devices, and other fields as core components for achieving fluid circuit switching.

[0003] Traditional two-position three-way solenoid valves often use a planar seal between the valve core and the valve body. Planar seals are affected by machining accuracy, and the sealing surface is prone to slight unevenness. Under high pressure conditions, liquid is prone to leakage from the gaps in the sealing surface.

[0004] Traditional two-position three-way solenoid valves mainly rely on the on and off-circuit power of electromagnets to control the displacement of the valve core, thereby achieving liquid circuit switching. However, they lack effective means to detect the actual movement position of the valve core. In practical applications, due to various factors, the valve core may not be able to move accurately to the preset position, resulting in liquid circuit switching failure or abnormality. Utility Model Content

[0005] In view of the above-mentioned technical problems in the existing technology, this utility model provides a two-position three-way solenoid valve.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A two-position three-way solenoid valve is provided, comprising a valve body with a cavity formed inside, and a valve core disposed within the cavity. The valve body is provided with an inlet, a first outlet, and a second outlet communicating with the cavity. A first spherical groove is formed between the inlet and the first outlet, and a second spherical groove is formed between the inlet and the second outlet. The valve core is formed with two spherical surfaces, which are spaced apart along the axial direction of the valve core. This allows one spherical surface to tightly fit with the corresponding first or second spherical groove when the valve core moves along the axial direction within the cavity, while the other spherical surface has a gap with the corresponding second or first spherical groove, thus forming a passage. A sealing edge is formed on the side of the first or second spherical groove that contacts the spherical surface. An electromagnet assembly is provided at one end of the valve body, and a pressure detection assembly is provided at the other end. The electromagnet assembly is fixedly connected to the valve core and is used to drive the valve core to move toward the pressure detection assembly. The pressure detection assembly is used to detect the position of the valve core when it moves toward the pressure detection assembly.

[0007] Preferably, the electromagnet assembly includes a housing, a coil, an armature, and a guide rod. The housing is fixedly connected to the end of the valve body, the armature is located at the center of the housing, the coil is wound around the inner wall of the housing, the end of the armature near the valve body is fixedly connected to the guide rod, and the end of the guide rod away from the armature is fixedly connected to the valve core.

[0008] Preferably, the guide rod extends into the cavity of the valve body away from the armature, and the valve body has a through hole for the guide rod to pass through. One end of the guide rod extending into the cavity is fixedly connected to the valve core.

[0009] Preferably, the pressure detection assembly includes a cover and a pressure sensor. The cover is fixed to the end of the valve body away from the electromagnet assembly, and the pressure sensor is located on the inner wall of the cover, facing the valve core. The valve core can abut against the pressure sensor.

[0010] Preferably, the pressure detection assembly further includes a pressure plate and a return spring. The pressure plate is fixed to the valve core, and the return spring is sleeved on the valve core. The return spring is located between the pressure plate and the cover, with one end of the return spring abutting against the pressure plate and the other end abutting against the cover.

[0011] Preferably, the liquid inlet is located on one side of the valve body, and the first liquid outlet and the second liquid outlet are located on the opposite side of the valve body to the liquid inlet, with the liquid inlet located between the first liquid outlet and the second liquid outlet.

[0012] Preferably, the first liquid outlet is located near the pressure detection component, and the second liquid outlet is located near the electromagnet component. Annular seals are provided between the first liquid outlet and the pressure detection component, and between the second liquid outlet and the electromagnet component, respectively. The annular seals are fitted onto the outer wall of the valve core, and the outer wall of the annular seals is tightly fitted to the inner wall of the valve body cavity.

[0013] The beneficial effects of this utility model are: This utility model discloses a two-position three-way solenoid valve. When the spherical surface on the valve core contacts the sealing edge of the corresponding first or second spherical groove, even if there is a slight dimensional deviation between the sealing edge of the first or second spherical groove and the spherical surface, the spherical surface can still maintain tight contact with the annular sealing edge to avoid leakage. By setting a pressure detection component at the end of the valve body, when the electromagnet component drives the valve core to move toward the pressure detection component, the pressure detection component can detect the pressure of the valve core pressing against the pressure detection component, and thus determine whether the valve core has moved into position. Attached Figure Description

[0014] Figure 1 This is a perspective view of a two-position three-way solenoid valve in the embodiment.

[0015] Figure 2 This is a cross-sectional view of a two-position three-way solenoid valve in the embodiment.

[0016] Figure 3 This is a perspective view of the valve core, pressure detection assembly, guide rod, and armature in the embodiment.

[0017] Figure 4 This is a cross-sectional view of the electromagnet assembly in the embodiment.

[0018] Figure 5 This is an exploded view of the pressure detection component in the embodiment.

[0019] Reference numerals: 1. Valve body; 2. Inlet; 3. First outlet; 4. Second outlet; 51. First spherical groove; 52. Second spherical groove; 53. Sealing edge; 6. Electromagnet assembly; 61. Housing; 62. Coil; 63. Armature; 64. Guide rod; 7. Valve core; 71. Spherical surface; 8. Pressure detection assembly; 81. Cover; 82. Pressure sensor; 83. Pressure plate; 84. Return spring; 9. Annular seal. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0021] This embodiment describes a two-position three-way solenoid valve, such as... Figure 1 and Figure 2 As shown, the valve includes a valve body 1 with a cavity inside. A valve core 7 is housed within the cavity. The valve body 1 has an inlet 2, a first outlet 3, and a second outlet 4. The inlet 2 is a liquid input channel, and the first outlet 3 and second outlet 4 are liquid output channels. The first outlet 3 and second outlet 4 have the same diameter as the inlet 2. The inlet 2 is located between the first outlet 3 and second outlet 4, and is situated on the top side of the valve body 1. The first outlet 3 and second outlet 4 are situated on the bottom side of the valve body 1.

[0022] The valve core 7 can move left and right within the cavity. When the valve core 7 moves to the right, it can block the channel between the inlet 2 and the second outlet 4, at which time the inlet 2 is connected to the first outlet 3. When the valve core 7 moves to the left, it can block the channel between the inlet 2 and the first outlet 3, at which time the inlet 2 is connected to the second outlet 4.

[0023] Combination Figure 1 , Figure 2 and Figure 3 As shown, a first spherical groove 51 is formed between the liquid inlet 2 and the first liquid outlet 3, and a second spherical groove 52 is formed between the liquid inlet 2 and the second liquid outlet 4. A sealing edge 53 is formed on the side of the first spherical groove 51 and the second spherical groove 52 closest to the liquid inlet 2.

[0024] The valve core 7 is formed with two spherical surfaces 71, which are spaced apart from each other. When the valve core 7 moves to the left, the spherical surface 71 on the left can contact the sealing edge 53 of the first spherical groove 51 and block the first spherical groove 51 at this point, thereby sealing the first liquid outlet 3. At this time, there is a gap between the other spherical surface 71 and the second spherical groove 52 so that the liquid inlet 2 can connect to the second liquid outlet 4, and vice versa.

[0025] Combination Figures 2 to 4 As shown, an electromagnet assembly 6 is provided at one end of the valve body 1. The electromagnet assembly 6 includes a housing 61, a coil 62, an armature 63, and a guide rod 64. The housing 61 of the electromagnet assembly 6 is made of magnetically conductive material, and the housing 61 is fixedly connected to the end of the valve body 1. The coil 62 is wound on the inner wall of the housing 61, and its winding position is relatively closer to the valve body 1. The armature 63 is located at the center of the housing 61, and its entire body is located inside the coil 62 and slightly away from the valve body 1. The end of the armature 63 near the valve core 7 is fixedly connected to the guide rod 64.

[0026] The guide rod 64 is the connecting component between the armature 63 and the valve core 7. The guide rod 64 passes through the valve body 1 and extends into its cavity. Specifically, a through hole matching the outer diameter of the guide rod 64 is pre-drilled on the valve body 1. The guide rod 64 extends into the cavity of the valve body 1 through this through hole, and its end extending into the valve body 1 is fixedly connected to the valve core 7 by a pin. It should be noted that the guide rod 64 and the through hole of the valve body 1 are axially fitted, allowing the guide rod 64 to move only axially.

[0027] In use, when the coil 62 is energized, the winding method of the coil 62 enables the coil 62 to generate a directional magnetic field. Since the outer shell 61 is made of magnetic material, it can concentrate the magnetic field generated by the coil 62 in the area where the armature 63 is located. The armature 63 is magnetized under the action of the magnetic field of the coil 62, and the armature 63 will form a magnetic pole with the opposite name to the magnetic pole of the coil 62. At this time, the coil 62 exerts an attractive force on the armature 63, causing the armature 63 and the guide rod 64 to move towards the coil 62, thereby driving the valve core 7 to move in the cavity. At this time, the valve core 7 can move away from the electromagnet assembly 6.

[0028] Combination Figure 2 , Figure 3 and Figure 5 As shown, a pressure detection component 8 is provided at the other end of the valve body 1. The pressure detection component 8 is used to detect whether the valve core 7 has moved into place when the inlet 2 is connected to the second outlet 4. The pressure detection component 8 includes a cover 81, a pressure sensor 82, a pressure plate 83 and a reset spring 84.

[0029] The valve body 1 is located at the end away from the electromagnet assembly 6. The pressure sensor 82 is located on the inner wall of the valve body 1 and faces the valve core 7. The pressure plate 83 is fixed on the valve core 7. The return spring 84 is located between the valve body 1 and the pressure plate 83. The return spring 84 is sleeved on the valve core 7. One end of the return spring 84 abuts against the pressure plate 83, and the other end of the return spring 84 abuts against the valve body 81. The end of the return spring 84 near the valve body 81 is formed with a spring seat, and the pressure sensor 82 passes through the spring seat.

[0030] It should be noted that, in order to prevent liquid from entering the interior of the pressure detection component 8 when the inlet 2 is connected to the first outlet 3, and to prevent liquid from entering the interior of the electromagnet component 6 when the inlet 2 is connected to the second outlet 4, annular seals 9 (such as O-rings) are provided between the first outlet 3 and the pressure detection component 8, and between the second outlet 4 and the electromagnet component 6, respectively. The annular seals 9 are fitted on the outer wall of the valve core 7, and the outer wall of the annular seals 9 is tightly fitted with the inner wall of the cavity of the valve body 1 to form a radial seal.

[0031] The working principle of this utility model is as follows: Under normal conditions, when the electromagnet assembly 6 is not energized, the liquid inlet 2 is connected to the first liquid outlet 3. Specifically, the reset spring 84 in the pressure detection assembly 8 drives the valve core 7 to move towards the electromagnet assembly 6. At this time, the spherical surface 71 on the right side of the valve core 7 can block the second spherical groove 52. When the coil 62 of the electromagnet assembly 6 is energized, the coil 62 generates an electromagnetic magnetic field. The armature 63 located at the center of the outer shell 61 is attracted by the electromagnetic force and moves towards the magnetic pole of the coil 62. Since one end of the armature 63 is fixedly connected to the guide rod 64, the armature 63 will drive the guide rod 64 to move synchronously, thereby pushing the valve core 7 to move towards the pressure detection assembly 8 (i.e., to the left). At this time, the reset spring 84 is compressed and stores elastic potential energy. When the end of the valve core 7 away from the electromagnet assembly 6 presses against the pressure sensor 82, the pressure sensor 82 converts the detected pressure signal into an electrical signal and transmits it to the control system. When the control system detects that the electrical signal reaches or exceeds the preset threshold, it indicates that the valve core 7 has moved into place. At this time, the spherical surface 71 on the left side of the valve core 7 can block the first spherical groove 51 so that the inlet 2 can be connected to the second outlet 4. When the electromagnet coil 62 is de-energized, the electromagnetic field disappears, and the armature 63 loses its electromagnetic attraction. At this time, the compressed return spring 84 releases its elastic potential energy, pushing the valve core 7 to move back towards the electromagnet assembly 6 and return to the initial state. The liquid circuit is switched back to connect the inlet 2 and the first outlet 3, completing one liquid circuit switching cycle formed by energization or de-energization.

[0032] In the description of this utility model, it is obvious that the described embodiments are only a part of the embodiments of this utility model, and not all of them. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the above detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0034] In the description of this utility model, it should be noted that the terms "middle," "upper," "lower," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

Claims

1. A two-position three-way solenoid valve, characterized in that, The valve body (1) includes a valve body (1) with a cavity inside, and a valve core (7) is provided inside the cavity. The valve body (1) is provided with an inlet (2), a first outlet (3), and a second outlet (4) communicating with the cavity. A first spherical groove (51) is formed between the inlet (2) and the first outlet (3), and a second spherical groove (52) is formed between the inlet (2) and the second outlet (4). The valve core (7) is formed with two spherical surfaces (71), which are spaced apart along the axial direction of the valve core (7) so that when the valve core (7) moves along the axial direction in the cavity, one of the spherical surfaces (71) can interact with the first spherical groove (52) on the corresponding side. 1) The second spherical groove (52) fits tightly, while the other spherical surface (71) has a gap with the corresponding side of the second spherical groove (52) or the first spherical groove (51), thus forming a passage. The side of the first spherical groove (51) and the second spherical groove (52) that contacts the spherical surface (71) is formed with a sealing edge (53). One end of the valve body (1) is provided with an electromagnet assembly (6), and the other end is provided with a pressure detection assembly (8). The electromagnet assembly (6) is fixedly connected to the valve core (7) and is used to drive the valve core (7) to move toward the pressure detection assembly (8). The pressure detection assembly (8) is used to detect the position of the valve core (7) when the valve core (7) moves toward it.

2. A two-position three-way solenoid valve according to claim 1, characterized in that, The electromagnet assembly (6) includes a housing (61), a coil (62), an armature (63), and a guide rod (64). The housing (61) is fixedly connected to the end of the valve body (1). The armature (63) is located at the center of the housing (61). The coil (62) is wound around the inner wall of the housing (61). The end of the armature (63) near the valve body (1) is fixedly connected to the guide rod (64). The end of the guide rod (64) away from the armature (63) is fixedly connected to the valve core (7).

3. A two-position three-way solenoid valve according to claim 2, characterized in that, The guide rod (64) extends into the cavity of the valve body (1) away from the armature (63). The valve body (1) has a through hole for the guide rod (64) to pass through. One end of the guide rod (64) extending into the cavity is fixedly connected to the valve core (7).

4. A two-position three-way solenoid valve according to claim 1, characterized in that, The pressure detection assembly (8) includes a cover (81) and a pressure sensor (82). The cover (81) is fixed to the end of the valve body (1) away from the electromagnet assembly (6). The pressure sensor (82) is located on the inner wall of the cover (81) and is positioned facing the valve core (7). The valve core (7) can abut against the pressure sensor (82).

5. A two-position three-way solenoid valve according to claim 4, characterized in that, The pressure detection assembly (8) also includes a pressure plate (83) and a reset spring (84). The pressure plate (83) is fixed to the valve core (7), and the reset spring (84) is sleeved on the valve core (7). The reset spring (84) is located between the pressure plate (83) and the cover (81). One end of the reset spring (84) abuts against the pressure plate (83), and the other end abuts against the cover (81).

6. A two-position three-way solenoid valve according to claim 1, characterized in that, The inlet (2) is located on one side of the valve body (1), and the first outlet (3) and the second outlet (4) are located on the opposite side of the valve body (1) from the inlet (2), with the inlet (2) located between the first outlet (3) and the second outlet (4).

7. A two-position three-way solenoid valve according to claim 6, characterized in that, The first outlet (3) is located near the pressure detection component (8), and the second outlet (4) is located near the electromagnet component (6). Annular seals (9) are provided between the first outlet (3) and the pressure detection component (8), and between the second outlet (4) and the electromagnet component (6). The annular seals (9) are fitted on the outer wall of the valve core (7), and the outer wall of the annular seals (9) is tightly fitted with the inner wall of the cavity of the valve body (1).

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