Electromagnetic valve

Abstract

The utility model relates to the technical field of valves, and discloses an electromagnetic valve which comprises a valve body, a valve cavity is arranged in the valve body, an inlet, an outlet and a discharge port which are communicated with the outside are arranged on the valve body, and the valve cavity comprises an inlet flow channel, an inlet and outlet communication port, an outlet flow channel, an outlet and discharge communication port and a discharge flow channel which are arranged in the axial direction and sequentially communicated. The valve element is arranged in the valve cavity in an axial sliding mode and used for selectively opening and closing the inlet and outlet communication opening and the outlet and outlet communication opening. Wherein the inflow channel comprises an axial inflow section in the axial direction and a radial inflow section in the radial direction, the outflow channel comprises an axial outflow section in the axial direction and a radial outflow section in the radial direction, and the drainage channel comprises an axial drainage section in the axial direction and a radial drainage section in the radial direction. And the inlet axial section, the outlet axial section and the discharge axial section are respectively and directly communicated with the inlet, the outlet and the discharge port. The electromagnetic valve is compact in structure, large in flow and high in installation flexibility.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of valve, especially a solenoid valve. BACKGROUND

[0002] As a commonly used fluid control element, solenoid valves are widely used in industrial automation, hydraulic systems, refrigeration equipment and other fields. The core function of solenoid valves is to drive the spool to move through electromagnetic force to realize the on-off or switching of flow path.

[0003] When pursuing large flow, traditional solenoid valves usually need to increase the size of the valve body or adopt a multi-valve combination structure, but this will result in large size and complex structure, which is difficult to meet the needs of modern equipment for compact design. In addition, the traditional straight-through or T-shaped flow channel layout has more limitations on the size and position of the external interface, and the installation flexibility is insufficient, which is difficult to adapt to diversified working conditions.

[0004] Therefore, there is an urgent need for a solenoid valve with compact structure, large flow and high installation flexibility to solve the problems of low space utilization, limited flow and insufficient installation flexibility caused by unreasonable flow channel design in the prior art. SUMMARY

[0005] The main purpose of the utility model is to provide a solenoid valve, which aims to solve the technical problems of low space utilization, limited flow and insufficient installation flexibility of traditional solenoid valves caused by unreasonable flow channel design.

[0006] To achieve the above-mentioned purpose, the utility model provides a solenoid valve, which comprises:

[0007] A valve body is provided with an inlet, an outlet and a drain port which are in communication with the outside, and a valve cavity is arranged inside the valve body. The valve cavity comprises an inflow channel, an inlet-outlet communication port, an outflow channel, an outlet-drain communication port and an outflow channel which are arranged in sequence along the axial direction and are in communication with each other.

[0008] A spool is arranged in the valve cavity in an axially sliding manner, and is used to selectively open and close the inlet-outlet communication port and the outlet-drain communication port.

[0009] Among them, the inflow channel comprises an inflow axial section along the axial direction and an inflow radial section along the radial direction, the outflow channel comprises an outflow axial section along the axial direction and an outflow radial section along the radial direction, and the outflow channel comprises an outflow axial section along the axial direction and an outflow radial section along the radial direction. The inflow axial section, the outflow axial section and the outflow axial section are directly communicated with the inlet, the outlet and the drain port respectively.

[0010] Optionally, in an embodiment, the spool has a first working position, a second working position and a transition position in the valve cavity.

[0011] In the first working position, the valve core closes the inlet-outlet communication port and opens the outlet-drain communication port;

[0012] In the second working position, the valve core opens the inlet-outlet communication port and closes the outlet-drain communication port;

[0013] In the transition position, the valve core simultaneously opens the inlet-outlet communication port and the outlet-drain communication port.

[0014] Optionally, in an embodiment, the electromagnetic valve further comprises an actuator for controlling the movement of the valve core, when the actuator is energized, the valve core moves from the first working position to the second working position, or the valve core moves from the second working position to the first working position.

[0015] Optionally, in an embodiment, the inlet flow passage and the outlet flow passage are centrally symmetrically distributed, and in a radial projection, the inlet axial section and the outlet axial section coincide.

[0016] Optionally, in an embodiment, the radial diameter of the inlet radial section, the outlet radial section and the drain radial section are all greater than the maximum diameter of the valve core.

[0017] Optionally, in an embodiment, the valve core comprises coaxially arranged first and second sealing pads, the sealing surface of the first sealing pad and the contact surface of the inlet-outlet communication port are complementary conical surface structures, and the sealing surface of the second sealing pad and the contact surface of the outlet-drain communication port are complementary conical surface structures.

[0018] Optionally, in an embodiment, the valve body is integrally pressure cast, and the valve core further comprises:

[0019] a valve stem, the two ends of the valve stem are respectively provided with first and second assembly portions;

[0020] first and second bushings, the first and second bushings are respectively sleeved on the outer periphery of the first and second sealing pads;

[0021] wherein, the first and second sealing pads are respectively provided with embedded grooves corresponding to the first and second assembly portions, and the two ends of the valve stem are fixed in the embedded grooves through interference fit.

[0022] Optionally, in an embodiment, the electromagnetic valve further comprises:

[0023] an end cover, the end cover is fixed to the end of the valve body through threaded connection, the end cover is provided with a sliding groove, and one end of the second bushing is axially slidably arranged in the sliding groove;

[0024] A reset spring is arranged in a receiving cavity formed by the inner cavity of the second bushing and the sliding groove of the end cover.

[0025] Optionally, in an embodiment, the two end portions of the valve rod have a larger diameter than the middle section, and the two end portions and the middle section are connected by a circular arc.

[0026] Optionally, in an embodiment, the outer periphery of the first bushing is provided with at least one annular sealing groove, and an O-shaped sealing ring is embedded in the annular sealing groove, and the O-shaped sealing ring forms a dynamic sealing cooperation with the inner wall of the valve cavity.

[0027] In the technical scheme, the inlet flow channel, the outlet flow channel and the discharge flow channel all adopt the L-shaped structure design of "axial section + radial section", so that the flow channel structure can be efficiently arranged in a three-dimensional space, the cross-sectional area of the flow channel is maximized in a limited space, compared with a traditional straight-through type or T-shaped flow channel, the axial length of the valve body can be greatly reduced, a larger effective flow-through cross-sectional area can be provided under the same external size, so that a higher flow rate is supported; the radial section expands the cross-sectional area of fluid flow-through, and the axial section is used for connecting external interfaces, so that the size, position and direction of the inlet, outlet and discharge port can be freely configured, different pipeline layout requirements are adapted, additional adapters are reduced, and the risk of leakage is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0028] One or more embodiments are illustrated by way of example with reference to the accompanying drawings, which are schematic and not intended to be limiting of the embodiments, and in which like reference numerals refer to like elements in the drawings and in which: the drawings do not limit the proportion.

[0029] Figure 1 is a structural schematic view of an embodiment of the electromagnetic valve of the utility model;

[0030] Figure 2 is a cross-sectional schematic view of a power-off state of an embodiment of the electromagnetic valve of the utility model;

[0031] Figure 3 is a cross-sectional schematic view of a power-on state of an embodiment of the electromagnetic valve of the utility model;

[0032] Figure 4 is another cross-sectional schematic view of a power-off state of an embodiment of the electromagnetic valve of the utility model.

[0033] In the drawings: 10, valve body; 11, inlet; 12, outlet; 13, discharge port;

[0034] 20, valve cavity; 21, inlet flow channel; 212, inlet-outlet communication port; 22, outlet flow channel; 223, outlet-discharge communication port; 23, discharge flow channel;

[0035] 30, valve core; 31, first gasket; 32, second gasket; 33, valve stem; 34, first bushing; 341, annular sealing groove; 35, second bushing; 36, O-ring;

[0036] 40, end cover;

[0037] 50, return spring. DETAILED DESCRIPTION

[0038] For the purpose of facilitating the understanding of the present application, the present application will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element or one or more intervening elements can be present therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element or one or more intervening elements can be present therebetween. The terms "vertical", "horizontal", "left", "right", "inner", "outer" and similar expressions used in the present specification are for the purpose of illustration only. In the description of the present application, the terms "first", "second" are used only for the purpose of description and should not be understood as indicating relative importance or implying a number of the technical features indicated. Therefore, unless otherwise specified, the features defined with "first", "second" can explicitly or implicitly include one or more of the features; the meaning of "plurality" is two or more. The term "comprising" and any variation thereof means non-exclusive inclusion, and one or more other features, integers, steps, operations, units, components and / or combinations thereof can be present or added.

[0039] In addition, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. All technical and scientific terms used in the present specification have the same meaning as understood by those skilled in the art of the present application. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the present specification includes any and all combinations of one or more related listed items.

[0040] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict between them.

[0041] As Figures 1 to 4 shown, the embodiment of the present application provides an electromagnetic valve, comprising:

[0042] A valve body 10 is internally provided with a valve cavity 20, and the valve body 10 is provided with an inlet 11, an outlet 12 and a drain 13 which are in communication with the outside, and the valve cavity 20 comprises an inlet flow passage 21, an inlet-outlet communication port 212, an outlet flow passage 22, an outlet-drain communication port 223 and a drain flow passage 23 which are sequentially arranged in an axial direction and are in communication with each other;

[0043] A valve core 30 is arranged in the valve cavity 20 in an axially slidable manner, and is used for selectively opening and closing the inlet-outlet communication port 212 and the outlet-drain communication port 223. A single valve core 30 can control the opening and closing of the inlet-outlet communication port 212 and the outlet-drain communication port 223 through axial sliding, and the action is direct and does not require multi-stage transmission, thereby shortening the response time and being suitable for applications requiring high-frequency switching;

[0044] The inlet flow passage 21 comprises an inlet axial section and an inlet radial section, the outlet flow passage 22 comprises an outlet axial section and an outlet radial section, and the drain flow passage 23 comprises a drain axial section and a drain radial section, and the inlet axial section, the outlet axial section and the drain axial section are directly in communication with the inlet 11, the outlet 12 and the drain 13 respectively.

[0045] The inlet flow passage 21, the outlet flow passage 22 and the drain flow passage 23 all adopt an L-shaped structure design of “axial section + radial section”, so that the flow passage structure can be efficiently arranged in a three-dimensional space, the cross-sectional area of the flow passage is maximized in a limited space, the axial length of the valve body 10 can be greatly reduced compared with a traditional straight-through type or T-shaped flow passage, a larger effective flow passage cross-sectional area can be provided under the same external size, thereby supporting a higher flow rate; the radial section expands the cross-sectional area of the fluid flow passage, and the axial section is used for connecting the external interfaces, so that the size, position and direction of the inlet 11, the outlet 12 and the drain 13 can be freely configured, different pipe layout requirements can be adapted, additional adapters are reduced, and the risk of leakage is reduced.

[0046] Referring to Figure 2 and Figure 3 , the valve core 30 has a first working position, a second working position and a transition position in the valve cavity 20;

[0047] In the first working position, the valve core 30 closes the inlet-outlet communication port 212 and opens the outlet-drain communication port 223, at this time, the inlet 11 and the outlet 12 are not in communication, and the outlet 12 and the drain 13 are in communication, which is convenient for rapid pressure relief or emptying of the system, and is suitable for shutdown, maintenance or safety relief scenarios;

[0048] In the second working position, the valve core 30 opens the inlet-outlet communication port 212 and closes the outlet-drain communication port 223, at this time, the inlet 11 and the outlet 12 are in communication, and the outlet 12 and the drain 13 are not in communication, which meets the normal fluid conveying requirement;

[0049] When the valve core 30 is in the transition position, the inlet and outlet communication port 212 and the outlet and exhaust communication port 223 are simultaneously opened. When the valve core 30 switches between the first working position and the second working position, it must pass through the transition position, so that the inlet port 11, the outlet port 12 and the exhaust port 13 are temporarily connected. This can avoid the "water hammer effect" (pressure impact) caused by the instantaneous opening and closing of the traditional electromagnetic valve, and is especially suitable for liquid or high-pressure gas systems.

[0050] The electromagnetic valve also includes an actuator (not shown in the figure) for controlling the movement of the valve core 30. The actuator includes an electromagnetic coil and a movable iron core linked with the valve core 30. When the electromagnetic coil is energized, the movable iron core pushes the valve core 30 to move from the first working position to the second working position (for a normally closed electromagnetic valve), or the movable iron core pushes the valve core 30 to move from the second working position to the first working position (for a normally open electromagnetic valve).

[0051] The electromagnetic valve can be designed as a normally closed electromagnetic valve or a normally open electromagnetic valve according to the needs. If the valve core 30 is in the first working position in the de-energized state of the actuator and in the second working position in the energized state, the electromagnetic valve is a normally closed electromagnetic valve. If the valve core 30 is in the first working position in the energized state of the actuator and in the second working position in the de-energized state, the electromagnetic valve is a normally open electromagnetic valve.

[0052] Referring to Figure 2 or Figure 3 In this embodiment, the inlet flow passage 21 and the outlet flow passage 22 are centrally symmetrically distributed, and in a radial projection, the inlet axial section and the outlet axial section coincide. This means that the inlet axial section and the outlet axial section share the same axial space, thereby reducing the overall size of the valve body 10 and achieving compact structure, which is especially suitable for scenes with limited installation space.

[0053] Referring to Figure 2 or Figure 3 In this embodiment, the radial diameters of the inlet radial section, the outlet radial section and the exhaust radial section are all greater than the maximum diameter of the valve core 30. The diameters of the radial sections are greater than the maximum diameter of the valve core 30, which means that when the fluid passes through the radial sections, it will not form a narrow channel due to the presence of the valve core 30, thereby avoiding the formation of a flow bottleneck.

[0054] In this embodiment, the valve core 30 includes coaxially arranged first and second sealing pads 31 and 32. The sealing surface of the first sealing pad 31 and the contact surface of the inlet and outlet communication port 212 are complementary conical surface structures, and the sealing surface of the second sealing pad 32 and the contact surface of the outlet and exhaust communication port 223 are complementary conical surface structures. The first and second sealing pads 31 and 32 have outer conical surfaces, and the inlet and outlet communication port 212 and the outlet and exhaust communication port 223 have inner conical surfaces. When the two conical surfaces are in contact, due to the angle and surface smoothness of the conical surfaces, a tight contact surface is formed between them. Under the action of external force, friction and pressure are generated between the two conical surfaces, thereby achieving good sealing effect.

[0055] In the embodiment, the valve body 10 is integrally pressure cast, the valve core 30 further comprises a valve rod 33, a first bushing 34 and a second bushing 35, the valve rod 33 is respectively provided with a first assembly part and a second assembly part at two ends thereof, the first bushing 34 and the second bushing 35 are respectively sleeved on the outer periphery of the first sealing gasket 31 and the second sealing gasket 32, wherein the first sealing gasket 31 and the second sealing gasket 32 are respectively provided with a matching groove corresponding to the first assembly part and the second assembly part, and the valve rod 33 is fixed in the matching groove through interference fit.

[0056] In the embodiment, the electromagnetic valve further comprises an end cover 40 and a reset spring 50, the end cover 40 is fixed on the end of the valve body 10 through threaded connection, the end cover 40 is provided with a sliding groove, and one end of the second bushing 35 is arranged in the sliding groove in an axially slidable manner; the reset spring 50 is arranged in a containing cavity formed by the inner cavity of the second bushing 35 and the sliding groove of the end cover 40. The reset spring 50 provides an automatic reset force of the valve core 30 (the valve core 30 is reset when power is off), and the containing cavity integrates the space for accommodating the reset spring 50, thereby further compacting the design.

[0057] Further, the diameters of the two end parts (the first assembly part and the second assembly part) of the valve rod 33 are greater than the diameter of the middle section, and the two end parts and the middle section are connected through a circular arc transition. The thickened structure of the two ends of the valve rod 33 can form a more stable interference fit with the matching grooves of the first sealing gasket 31 and the second sealing gasket 32, the reduced diameter of the middle section can form a larger annular flow channel space with the inner wall of the valve cavity 20, thereby improving the flow efficiency under large flow conditions, and the circular arc transition can reduce the generation of fluid turbulence and vortex, thereby further reducing pressure loss.

[0058] Further, the outer periphery of the first bushing 34 is provided with at least one annular sealing groove 341, and an O-shaped sealing ring 36 is embedded in the annular sealing groove 341, the O-shaped sealing ring 36 forms a dynamic sealing fit with the inner wall of the valve cavity 20, thereby preventing leakage of the valve cavity 20.

[0059] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; under the idea of the present application, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above, which are not provided in details for the sake of simplicity; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An electromagnetic valve characterized by comprising: The utility model relates to a valve body (10) internally provided with a valve cavity (20), the valve body (10) is provided with an inlet (11), an outlet (12) and a discharge port (13) in communication with the outside, the valve cavity (20) includes an inflow channel (21), an inlet-outlet communication port (212), an outflow channel (22), an outlet-discharge communication port (223) and a discharge channel (23) arranged in sequence along the axial direction and communicated in sequence, a valve core (30) arranged in the valve cavity (20) in an axially slidable manner for selectively opening and closing the inlet-outlet communication port (212) and the outlet-discharge communication port (223), wherein the inflow channel (21) includes an axial inflow section and a radial inflow section, the outflow channel (22) includes an axial outflow section and a radial outflow section, the discharge channel (23) includes an axial discharge section and a radial discharge section, and the axial inflow section, the axial outflow section and the axial discharge section are directly communicated with the inlet (11), the outlet (12) and the discharge port (13) respectively. The valve core (30) has a first working position, a second working position and a transition position in the valve cavity (20), when in the first working position, the valve core (30) closes the inlet-outlet communication port (212) and opens the outlet-discharge communication port (223), when in the second working position, the valve core (30) opens the inlet-outlet communication port (212) and closes the outlet-discharge communication port (223), 2. The electromagnetic valve according to claim 1, characterized by when in the transition position, the valve core (30) simultaneously opens the inlet-outlet communication port (212) and the outlet-discharge communication port (223). The utility model further includes an actuator for controlling the movement of the valve core (30), when the actuator is powered on, the valve core (30) moves from the first working position to the second working position, or the valve core (30) moves from the second working position to the first working position. The inflow channel (21) and the outflow channel (22) are centrally symmetrically distributed, and in a radial projection, the axial inflow section and the axial outflow section coincide. The radial diameters of the radial inflow section, the radial outflow section and the radial discharge section are all greater than the maximum diameter of the valve core (30).

3. The electromagnetic valve according to claim 2, characterized by The valve core (30) includes coaxially arranged first and second sealing pads (31) and (32), the sealing surface of the first sealing pad (31) and the contact surface of the inlet-outlet communication port (212) are complementary conical surface structures, and the sealing surface of the second sealing pad (32) and the contact surface of the outlet-discharge communication port (223) are complementary conical surface structures.

4. The electromagnetic valve according to claim 1, characterized by The valve body (10) is integrally pressure-cast, and the valve core (30) further includes a valve stem (33) having first and second assembly portions at two ends thereof, first and second bushings (34) and (35) respectively sleeved on the outer periphery of the first and second sealing pads (31) and (32).

5. The electromagnetic valve according to claim 1, characterized by ​ 6. The electromagnetic valve according to claim 1, characterized by ​ 7. The electromagnetic valve according to claim 6, characterized by ​ ​ ​ The first sealing gasket (31) and the second sealing gasket (32) are respectively provided with an embedded groove corresponding to the first assembly part and the second assembly part, and the valve rod (33) is fixed in the embedded groove through interference fit.

8. The electromagnetic valve according to claim 7, characterized by Also comprising: An end cover (40) is fixed to the end of the valve body (10) through threaded connection, the end cover (40) is provided with a sliding groove, and one end of the second bushing (35) is axially and slidably arranged in the sliding groove; A reset spring (50) is arranged in a containing cavity formed by the inner cavity of the second bushing (35) and the sliding groove of the end cover (40).

9. The electromagnetic valve according to claim 7, characterized by The diameters of the two end portions of the valve rod (33) are greater than the diameter of the middle section, and the two end portions and the middle section are connected through a circular arc.

10. The electromagnetic valve according to claim 7, characterized by The outer periphery of the first bushing (34) is provided with at least one annular sealing groove (341), and an O-shaped sealing ring (36) is embedded in the annular sealing groove (341), and the O-shaped sealing ring (36) forms a dynamic sealing cooperation with the inner wall of the valve cavity (20).

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