Solenoid valve

Abstract

An electromagnetic valve comprises a valve body, a filter element and an iron core assembly, and a flow inlet channel is formed in the valve body; the filter element is arranged in the inflow channel, and filter holes are formed in the filter element; the iron core assembly comprises a winding frame, a fixed iron core and a movable iron core, one end of the winding frame is arranged on the fixed iron core in a sleeving mode, the other end of the winding frame is connected with the valve body, a valve cavity is defined by the valve body, the winding frame and the fixed iron core, the valve cavity is communicated with the inflow channel, and the movable iron core is movably arranged in the valve cavity; in the radial direction of the movable iron core, a gap is formed between the outer wall of the movable iron core and the inner wall of the winding frame, and the gap is larger than the hole diameter of the filtering holes. According to the electromagnetic valve provided by the embodiment of the invention, the filter element is arranged in the inflow channel, impurities and particles in fluid can be effectively filtered out, the gap between the movable iron core and the winding frame is designed, and the gap between the movable iron core and the winding frame is set to be larger than the hole diameter of the filter hole; therefore, the filtering effect and the reliability of the electromagnetic valve are further enhanced.

Description

Technical Field

[0001] This application relates to the field of valve technology, specifically to a solenoid valve. Background Technology

[0002] A solenoid valve is an electromagnetically controlled industrial device, a fundamental component in automation systems used to control fluids, adjusting the direction, flow rate, speed, and other parameters of the medium. The working principle of a solenoid valve is as follows: when energized, the magnetic field generated by the coil magnetizes the iron core, attracting the moving and stationary iron cores to connect the inlet and outlet, allowing fluid flow; when de-energized, the magnetic field disappears, and under the action of spring force and pressure differential, the moving and stationary iron cores separate, the moving iron core returns to its original position, and the passage between the inlet and outlet is cut off.

[0003] In existing technologies, impurities in the fluid can easily enter the valve body, causing problems such as valve port blockage and valve core jamming, which affect the normal operation of the solenoid valve and reduce its service life and reliability. Utility Model Content

[0004] The purpose of this application is to provide a solenoid valve that solves the problems of easy jamming and poor dirt resistance of solenoid valves.

[0005] To achieve the objectives of this application, the following technical solution is provided:

[0006] In a first aspect, this application provides a solenoid valve, comprising:

[0007] Valve body, wherein the valve body is provided with a flow inlet channel;

[0008] A filter element is disposed within the inlet channel, and the filter element is provided with filter holes;

[0009] The iron core assembly includes a winding frame, a fixed iron core, and a movable iron core. One end of the winding frame is sleeved on the fixed iron core, and the other end of the winding frame is connected to the valve body. The valve body, the winding frame, and the fixed iron core form a valve cavity, which is connected to the inlet channel. The movable iron core is movably disposed within the valve cavity.

[0010] In the radial direction of the moving iron core, there is a gap between the outer wall of the moving iron core and the inner wall of the winding frame, and the gap is larger than the aperture of the filter hole.

[0011] In one embodiment, the pore size of the filter is less than or equal to 5 μm.

[0012] In one embodiment, the gap is greater than or equal to 0.1 mm.

[0013] In one embodiment, the core assembly further includes a coil wound on the winding frame, the power of the coil being greater than or equal to 1.2W, and the electromagnetic force generated by the coil being greater than or equal to 1.2N.

[0014] In one embodiment, the inlet channel includes a first inlet hole and a second inlet hole located at both ends, the filter element is disposed in the first inlet hole, and the second inlet hole is connected to the valve cavity.

[0015] In one embodiment, the diameter of the second inlet hole is greater than or equal to 0.9 mm.

[0016] In one embodiment, the first inlet hole extends radially along the moving iron core, and the second inlet hole extends axially along the moving iron core. The moving iron core can block one end of the second inlet hole, thereby blocking the inlet channel from the valve cavity.

[0017] In one embodiment, the first inlet hole includes a first hole segment, a second hole segment, and a third hole segment connected in sequence, and the filter element is disposed in the first hole segment;

[0018] On a cross section perpendicular to the axial direction of the moving iron core, the area of ​​the first hole segment is greater than the area of ​​the third hole segment, and the area of ​​the second hole segment gradually decreases from the end closer to the first hole segment to the end closer to the third hole segment.

[0019] In one embodiment, the valve body is further provided with an outlet channel, one end of which is connected to the valve cavity, and the other end of which is used to connect to an external pipeline.

[0020] In one embodiment, the outflow channel includes a first outflow hole, a second outflow hole, and a third outflow hole connected in sequence. The first outflow hole is located radially outside the second inflow hole, the second inflow hole extends axially along the moving iron core, and the third outflow hole extends radially along the moving iron core.

[0021] Compared with the prior art, this application has at least the following beneficial effects:

[0022] 1. In this application, by setting a filter element in the inlet channel, impurities and particulate matter in the fluid can be effectively filtered out, thereby protecting the precision components inside the solenoid valve from damage and extending the service life of the solenoid valve.

[0023] 2. In this application, the gap design between the moving iron core and the winding frame avoids the interference of particulate matter in the fluid on the normal operation of the moving iron core, and further improves the reliability and stability of the solenoid valve.

[0024] 3. In this application, the gap between the moving iron core and the winding frame is set to be larger than the diameter of the filter hole, thereby further enhancing the filtration effect and reliability of the solenoid valve. Even if the fluid entering the valve cavity contains tiny particles, the solenoid valve will not malfunction because the particles are stuck between the moving iron core and the winding frame. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a perspective view of a solenoid valve according to one embodiment of this application;

[0027] Figure 2 This is an exploded view of a solenoid valve according to one embodiment of this application;

[0028] Figure 3 This is a top view of a solenoid valve according to one embodiment of this application;

[0029] Figure 4 for Figure 3 AA section view in the middle;

[0030] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0031] Figure 6 for Figure 4 A schematic diagram of the structure after the filter element has been removed.

[0032] Figure 7 for Figure 3 BB section view in the middle.

[0033] Explanation of reference numerals in the attached figures:

[0034] 100. Valve body; 110. Inlet channel; 111. First inlet hole; 111a. First hole section; 111b. Second hole section; 111c. Third hole section; 112. Second inlet hole; 120. Valve cavity; 130. Outlet channel; 131. First outlet hole; 132. Second outlet hole; 133. Third outlet hole; 200. Filter element; 300. Iron core assembly; 310. Winding frame; 311. Gap; 320. Fixed iron core; 330. Moving iron core; 340. Coil; 341. First terminal; 342. Second terminal. Detailed Implementation

[0035] The following are specific embodiments of this application, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of this application. However, this application is not limited to these embodiments.

[0036] refer to Figures 1-5 This application provides a solenoid valve, including a valve body 100, a filter element 200, and an iron core assembly 300.

[0037] The valve body 100 is provided with an inlet channel 110 for fluid input. The filter element 200 is disposed inside the inlet channel 110 and has filter holes. By placing the filter element 200 inside the inlet channel 110, and the filter element 200 being covered with filter holes, the main function of these filter holes is to filter impurities in the fluid. The fluid can be liquid or gas, and there are no specific restrictions.

[0038] The iron core assembly 300 includes a winding frame 310, a fixed iron core 320, and a movable iron core 330. One end of the winding frame 310 is sleeved on the fixed iron core 320, and the other end of the winding frame 310 is connected to the valve body 100. The valve body 100, the winding frame 310, and the fixed iron core 320 form a valve cavity 120, which is connected to the inlet channel 110. The movable iron core 330 is movably disposed in the valve cavity 120 and can move under the action of electromagnetic force.

[0039] In the radial direction of the moving iron core 330, there is a gap 311 between the outer wall of the moving iron core 330 and the inner wall of the winding frame 310. The gap 311 between the moving iron core 330 and the winding frame 310 is designed to avoid the interference of particulate matter in the fluid on the normal operation of the moving iron core 330, and further improve the reliability and stability of the solenoid valve.

[0040] The gap 311 between the outer wall of the moving iron core 330 and the inner wall of the winding frame 310 is larger than the aperture of the filter hole, thereby further enhancing the filtration effect and reliability of the solenoid valve. Even if the fluid entering the valve chamber 120 contains tiny particles, the solenoid valve will not malfunction because the particles are stuck between the moving iron core 330 and the winding frame 310.

[0041] In this embodiment, the filter element 200 is made of high-precision filter material, which can effectively intercept various impurity particles in the fluid, such as particulate dust and fibers. The filter element 200 is detachable, which facilitates cleaning or replacement after a period of use to ensure its continuous and effective filtration capability.

[0042] The pore size of the filter is less than or equal to 5 μm (micrometers) so that the filter element 200 can more effectively trap tiny particles and impurities in the fluid. This improved precision is crucial for protecting the precision components inside the solenoid valve and for suppressing the interference or damage caused by tiny particles to the normal operation of the solenoid valve.

[0043] Through high-precision filtration, the fluid is thoroughly purified before entering valve chamber 120, reducing the risk of solenoid valve malfunction due to particulate matter. This not only improves the stability of the solenoid valve but also extends its service life and reduces maintenance and replacement costs.

[0044] The gap 311 between the outer wall of the moving iron core 330 and the inner wall of the winding frame 310 is greater than or equal to 0.1 mm. This gap ensures that even if the fluid contains small particles, these particles will not become stuck between the moving iron core 330 and the winding frame 310 due to their small size. This effectively prevents solenoid valve malfunctions caused by particle blockage and improves the reliability and stability of the solenoid valve. Sufficient gap 311 also reduces friction between the moving iron core 330 and the inner wall of the winding frame 310 during movement, thus reducing wear. This not only extends the service life of the solenoid valve but also reduces noise and energy loss caused by friction.

[0045] While ensuring the movement guidance of the moving iron core 330, its movement gap 311 is appropriately increased. When there are certain impurities in the fluid, the larger movement gap 311 can reduce the obstruction of the moving iron core 330 by the impurities, so that the inlet channel 110 and the valve cavity 120 can be smoothly connected or blocked, thereby improving the anti-fouling performance of the solenoid valve.

[0046] In this embodiment, the core assembly 300 further includes a coil 340, which is wound on a winding frame 310. When the coil 340 is energized, the magnetic field generated by the coil 340 magnetizes the fixed core 320, and the moving core 330 moves under the action of the magnetic field.

[0047] The coil 340 has a power greater than or equal to 1.2W, and it can generate sufficient heat and electromagnetic field when energized, thus providing a stronger electromagnetic driving force. The electromagnetic force generated by the coil 340 is greater than or equal to 1.2N, ensuring that the moving iron core 330 can overcome fluid pressure and friction under the action of electromagnetic force.

[0048] By optimizing the winding parameters of the electromagnetic coil 340 or selecting higher-performance magnetic materials, its power can be appropriately increased, thereby increasing the electromagnetic force used to open the flow channel 110 and the valve chamber 120. When there are certain impurities in the fluid, the larger electromagnetic force can overcome the resistance of the impurities to the movement of the moving iron core 330, allowing the flow channel 110 and the valve chamber 120 to open and close smoothly, thus improving the solenoid valve's resistance to contamination and enabling the solenoid valve to work stably even when faced with impurities.

[0049] The coil 340 is connected to a first terminal 341 and a second terminal 342 at its two ends. The coil 340 is connected to an external circuit through the first terminal 341 and the second terminal 342 to realize the power supply of the coil 340.

[0050] refer to Figures 4-7 The inlet channel 110 includes a first inlet hole 111 and a second inlet hole 112 located at both ends. The filter element 200 is disposed within the first inlet hole 111, and the second inlet hole 112 is connected to the valve chamber 120. Placing the filter element 200 within the first inlet hole 111 effectively pre-filters the fluid entering the solenoid valve, helping to remove large particulate impurities and protecting the precision components inside the solenoid valve from damage. Furthermore, the filter element 200's location at the front end of the inlet channel 110 maximizes the service life of the solenoid valve. The second inlet hole 112's connection to the valve chamber 120 ensures that the fluid filtered by the filter element 200 can smoothly enter the valve chamber 120.

[0051] The second inlet orifice 112 has a diameter greater than or equal to 0.9 mm, allowing the fluid filtered by the filter element 200 to enter the valve chamber 120 more smoothly, reducing fluid resistance in the inlet channel 110 and improving fluid flow efficiency. Increasing the diameter of the second inlet orifice 112 not only increases the flow rate of the solenoid valve itself, meeting the needs of higher flow rate applications, but also significantly improves the solenoid valve's dirt resistance. The larger diameter of the second inlet orifice 112 makes it less likely for impurities to clog it, and even if impurities enter the inlet channel 110, they are more easily discharged through the second inlet orifice 112, reducing the impact of impurities on the second inlet orifice 112 and the moving iron core 330.

[0052] The first inlet hole 111 extends radially along the moving iron core 330, and the second inlet hole 112 extends axially along the moving iron core 330. The moving iron core 330 can block one end of the second inlet hole 112, thus blocking the flow channel 110 from the valve chamber 120. The moving iron core 330 can block one end of the second inlet hole 112, forming an effective sealing structure. When the solenoid valve is in the closed state, the fluid between the flow channel 110 and the valve chamber 120 is completely blocked, avoiding the risk of fluid leakage. By controlling the movement of the moving iron core 330, the opening and closing of the second inlet hole 112 and the valve chamber 120 can be precisely controlled, thereby achieving precise control of fluid flow. Furthermore, by directly blocking the second inlet hole 112 with the moving iron core 330, the overall structure of the solenoid valve is simplified.

[0053] The first inlet hole 111 includes a first section 111a, a second section 111b, and a third section 111c connected in sequence. The filter element 200 is disposed within the first section 111a. In a cross-section perpendicular to the axial direction of the moving iron core 330, the area of ​​the first section 111a is larger than that of the third section 111c, and the area of ​​the second section 111b gradually decreases from the end closer to the first section 111a to the end closer to the third section 111c. Specifically, the filter element 200 is disposed within the first section 111a. The larger area of ​​the first section 111a can accommodate more fluid, thereby increasing the contact area between the fluid and the filter element 200 and improving the filtration efficiency. Simultaneously, the placement of the filter element 200 facilitates user replacement and maintenance. The design of the second orifice 111b allows its area to gradually decrease from the end near the first orifice 111a to the end near the third orifice 111c. This conical or flared transition structure helps reduce fluid resistance between orifices and improves fluid flow efficiency. Simultaneously, the smaller area of ​​the third orifice 111c better matches the inlet size of the valve chamber 120, ensuring smooth fluid entry into the valve chamber 120.

[0054] In this embodiment, the valve body 100 is further provided with an outlet channel 130. One end of the outlet channel 130 is connected to the valve cavity 120, and the other end of the outlet channel 130 is used to connect to an external pipeline. The design of the outlet channel 130 enables the solenoid valve to form a complete fluid control system. Fluid enters the valve cavity 120 through the inlet channel 110, and after being controlled by the solenoid valve, it flows out through the outlet channel 130 and enters the external pipeline.

[0055] The outflow channel 130 includes a first outflow hole 131, a second outflow hole 132, and a third outflow hole 133 connected in sequence. The first outflow hole 131 is located radially outside the second inflow hole 112, which extends axially along the moving iron core 330. The third outflow hole 133 extends radially along the moving iron core 330. By designing the outflow channel 130 to include the first outflow hole 131, the second outflow hole 132, and the third outflow hole 133 connected in sequence, the flow path of the fluid inside the solenoid valve can be optimized. This design helps to reduce fluid resistance and pressure loss during flow, and improves fluid flow efficiency.

[0056] The first outlet orifice 131 is located radially outside the second inlet orifice 112, a layout that makes the solenoid valve structure more compact. The second outlet orifice 132 extends axially along the moving iron core 330, while the third outlet orifice 133 extends radially along the moving iron core 330. This design makes the solenoid valve more flexible in fluid control. By adjusting the size, shape, and position of the outlet channel 130, it can be adapted to different fluid control systems and piping layout requirements.

[0057] The solenoid valve provided in this application improves the solenoid valve's dirt resistance, extends its overall service life, and reduces its maintenance costs and replacement frequency by setting a filter element 200 in the inlet channel 110, increasing the filtration accuracy of the filter element 200, increasing the gap 311 between the moving iron core 330 and the winding frame 310, increasing the power and electromagnetic force generated by the coil 340, and increasing the size of the second inlet hole 112.

[0058] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0059] Furthermore, the use of terms such as "first," "second," and "a" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0060] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0061] Furthermore, the technical solutions of the various embodiments of this application can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this application.

Claims

1. An electromagnetic valve characterized by comprising: The utility model relates to a valve, which comprises: a valve body provided with an inlet channel; a filter element provided in the inlet channel, the filter element being provided with a filter hole; an iron core assembly comprising a bobbin, a fixed iron core and a movable iron core, one end of the bobbin being sleeved on the fixed iron core, the other end of the bobbin being connected with the valve body, the valve body, the bobbin and the fixed iron core forming a valve cavity, the valve cavity being in communication with the inlet channel, the movable iron core being movably arranged in the valve cavity; in the radial direction of the movable iron core, a gap is formed between the outer wall of the movable iron core and the inner wall of the bobbin, the gap being greater than the diameter of the filter hole.

2. The electromagnetic valve according to claim 1, characterized by The diameter of the filter hole is less than or equal to 5 microns.

3. The electromagnetic valve according to claim 1, characterized by The gap is greater than or equal to 0.1 mm.

4. The electromagnetic valve according to claim 1, characterized by The iron core assembly further comprises a coil wound on the bobbin, the power of the coil being greater than or equal to 1.2 W, the electromagnetic force generated by the coil being greater than or equal to 1.2 N.

5. The electromagnetic valve according to claim 1, characterized by The inlet channel comprises a first inlet hole and a second inlet hole at two ends, the filter element being arranged in the first inlet hole, the second inlet hole being connected with the valve cavity.

6. The electromagnetic valve according to claim 5, characterized by The diameter of the second inlet hole is greater than or equal to 0.9 mm.

7. The electromagnetic valve according to claim 5, wherein The first inlet hole extends in the radial direction of the movable iron core, the second inlet hole extending in the axial direction of the movable iron core, the movable iron core being capable of blocking one end of the second inlet hole so as to block the inlet channel and the valve cavity.

8. The electromagnetic valve according to claim 7, characterized by The first inlet hole comprises a first hole section, a second hole section and a third hole section connected in sequence, the filter element being arranged in the first hole section; in the cross section perpendicular to the axial direction of the movable iron core, the area of the first hole section is greater than that of the third hole section, and the area of the second hole section gradually decreases from one end close to the first hole section to the other end close to the third hole section.

9. The electromagnetic valve according to claim 7, characterized by The valve body is further provided with an outlet channel, one end of the outlet channel being in communication with the valve cavity, the other end of the outlet channel being used for communication with an external pipeline.

10. The electromagnetic valve according to claim 9, characterized by The outlet channel comprises a first outlet hole, a second outlet hole and a third outlet hole connected in sequence, the first outlet hole being located on the radial outer side of the second inlet hole, the second outlet hole extending in the axial direction of the movable iron core, and the third outlet hole extending in the radial direction of the movable iron core.

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