Electromagnetic valve with check valve function
By introducing ball bearings and a tilting section into the solenoid valve, combined with a limit plate and control components, the problem of the lack of backflow prevention in solenoid valves is solved, realizing normal fluid flow and backflow prevention functions.
Patent Information
- Application Number
- CN202520639903.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-07
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-04-07
AI Technical Summary
Existing solenoid valves lack backflow prevention functionality, which may cause fluid backflow to affect their normal operation and potentially introduce impurities.
Design a solenoid valve with a check valve function. By setting a ball and an inclined section in the outflow channel, the ball contacts the inclined section to block the flow of the outflow section when the fluid flows back. Combined with a limit plate and control components, backflow prevention is achieved.
This effectively avoids the impact of fluid backflow on the solenoid valve, ensures normal fluid flow, and enhances the solenoid valve's anti-backflow function.
Smart Images
Figure CN223923858U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of solenoid valve technology, and specifically to a solenoid valve with a check valve function. Background Technology
[0002] Solenoid valves are electromagnetically controlled industrial devices and fundamental components of automation systems used to control fluid flow. They are actuators, not limited to hydraulic or pneumatic systems; however, their function is singular: controlling whether fluid flows. Furthermore, their structure includes an inlet and an outlet, but the outlet lacks a backflow prevention mechanism, allowing fluid backflow to occur and potentially obstruct subsequent fluid flow. This backflow may also contain impurities, which, if it reaches the part of the solenoid valve that controls fluid flow, can affect its operation. Summary of the Invention
[0003] The purpose of this utility model is to provide a solenoid valve with a check valve function. By setting the ball and the inclined section, the connection between the outflow section one and the outflow section two can be blocked when the fluid flows back, thereby avoiding the impact of fluid backflow on the solenoid valve. Secondly, it also enables the solenoid valve to have a check valve function, that is, an anti-backflow function, thus solving the problem that the existing solenoid valves do not have the anti-backflow function.
[0004] The purpose of this utility model is achieved as follows:
[0005] A solenoid valve with a check valve function includes a valve body, and the valve body includes a main pipe and a control component disposed on the main pipe, wherein the main pipe has an outflow channel and an inflow channel, and the control component is used to control whether the outflow channel and the inflow channel are connected.
[0006] The inner wall of the outflow channel is divided into outflow section one and outflow section two. The diameter of outflow section one is smaller than that of outflow section two. An inclined section is provided between outflow section one and outflow section two. The main pipe contains ball bearings, which roll within outflow section two. When fluid flows back, the ball bearings are forced to move until their outer side contacts the inclined section, thereby blocking the connection between outflow section one and outflow section two.
[0007] Preferably, the second outflow section is provided with a limiting plate at the end away from the first outflow section, and the limiting plate has holes for fluid flow, and the limiting plate is used to prevent the ball from dislodging from the second outflow section.
[0008] Preferably, the limiting plate includes a limiting part and a connecting part located outside the limiting part, wherein there are four connecting parts, and there is a hole between two adjacent connecting parts, and the connecting parts are threadedly connected to the outflow section two.
[0009] Preferably, a step is provided between the outflow section and the inclined section.
[0010] Preferably, a diaphragm is provided between the main pipe and the control component, and the diaphragm has through holes one and two corresponding to the outflow channel and the inflow channel, respectively. The flow rate can be adjusted by changing the diameter of through holes one and through holes two.
[0011] Preferably, the bottom of the diaphragm is provided with a protrusion, and the main pipe is provided with an installation platform, and the middle of the installation platform is slotted and connected to the outflow channel and the inflow channel, and the bottom of the installation platform is provided with a slot corresponding to the protrusion;
[0012] Alternatively / and, a collar is built into the through hole, and protrusions are provided on the outer sides of both ends of the collar, and the protrusions are attached to the outer surface of the diaphragm.
[0013] Preferably, the control component includes a base and a housing, and a diaphragm is located between the base and the main pipe. The bottom of the base is connected to the main pipe, and a channel is opened in the middle of the base. A moving iron core is built into the channel. A coil seat is fitted on the top of the base, and a coil is wound around the outside of the coil seat. A stationary iron core is built into the coil seat, and the stationary iron core is located above the moving iron core.
[0014] The outer shell is located outside the coil, and the bottom of the moving iron core is located at the opening of the outflow channel, thereby blocking the connection between the outflow channel and the inflow channel. By energizing the coil, a magnetic field is generated between the moving iron core and the stationary iron core, which in turn drives the moving iron core to move, thereby connecting the outflow channel and the inflow channel.
[0015] Preferably, a spring is provided between the moving iron core and the stationary iron core, and the spring is used to reset the moving iron core after it has been moved.
[0016] Or / and, both the top and bottom of the coil base are provided with protrusions, and the control component also includes a bracket, which is located between the coil base and the housing, and a terminal is provided on one side of the bracket, which passes through the housing and protrudes. The bracket is C-shaped and includes two mounting plates and a connecting plate for connecting the two mounting plates. The mounting plate has an opening in the middle and a snap-fit groove is provided corresponding to the protrusion.
[0017] Alternatively / and, one end of the stationary iron core is threadedly connected to the base, and the other end of the stationary iron core passes through the outer casing and is connected to a knob.
[0018] Preferably, the control component includes a housing, a coil holder, a stationary iron core, and a moving iron core. The top of the main pipe has a placement channel communicating with the outflow channel and the inflow channel. The moving iron core is built into the placement channel. The top of the main pipe is fitted with a coil holder. A coil is wound around the outside of the coil holder. The stationary iron core is built into the coil holder and is located above the moving iron core.
[0019] The outer shell is located outside the coil, and the bottom of the moving iron core is located at the opening of the outflow channel, thereby blocking the connection between the outflow channel and the inflow channel. By energizing the coil, a magnetic field is generated between the moving iron core and the stationary iron core, which in turn drives the moving iron core to move, thereby connecting the outflow channel and the inflow channel.
[0020] The outstanding and beneficial technical effects of this utility model compared to the prior art are:
[0021] This invention, through the arrangement of ball bearings and inclined sections, can block the connection between outflow section one and outflow section two when fluid flows back, thereby avoiding the impact of fluid backflow on the solenoid valve. Secondly, it also enables the solenoid valve to have a check valve function, that is, an anti-backflow function. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the structure of this utility model.
[0023] Figure 2 This is a cross-sectional structural diagram of the present invention.
[0024] Figure 3 for Figure 2 Enlarged structural diagram of section A in the middle.
[0025] Figure 4 This is a schematic diagram of the ball bearing structure.
[0026] Figure 5 This is a structural diagram showing the disassembled parts of this utility model.
[0027] Figure 6 This is a schematic diagram of the membrane structure.
[0028] Figure 7 This is a structural diagram of the support and coil holder.
[0029] Figure 8 This is a cross-sectional view without the diaphragm.
[0030] Attached diagram labels: 1-Main pipe; 11-Outflow channel; 111-Outflow section one; 112-Outflow section two;
[0031] 113 - Inclined section; 114 - Step; 12 - Flow channel; 13 - Limiting plate; 131 - Limiting part;
[0032] 132-Connecting part; 133-Hole; 14-Ball bearing; 15-Mounting platform; 151-Slot; 16-Placement channel;
[0033] 2-Diaphragm; 21-Through hole one; 22-Through hole two; 23-Protrusion; 24-Collar ring; 241-Protruding plate; 3-Base;
[0034] 31-Channel; 4-Outer shell; 5-Coil base; 51-Protrusion; 6-Stationary iron core; 7-Moving iron core; 8-Bracket;
[0035] 81-Connector; 82-Mounting plate; 821-Snap-fit slot; 83-Connecting plate; 9-Knob; 10-Spring. Detailed Implementation
[0036] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.
[0037] like Figures 1-8 As shown, a solenoid valve with a check valve function includes a valve body, and the valve body includes a main pipe 1 and a control component disposed on the main pipe 1. The main pipe 1 has an outflow channel 11 and an inflow channel 12, and the control component is used to control whether the outflow channel 11 and the inflow channel 12 are connected.
[0038] Meanwhile, the inner wall of the outflow channel 11 is divided into outflow section one 111 and outflow section two 112, and the diameter of outflow section one 111 is smaller than the diameter of outflow section two 112. An inclined section 113 is provided between outflow section one 111 and outflow section two 112. In addition, the main pipe 1 is equipped with a ball bearing 14, and the ball bearing 14 rolls in outflow section two 112.
[0039] Therefore, in actual use, the normal flow direction of the fluid is from outflow section 111 to outflow section 212. At this time, the ball 14 rolls in outflow section 212 and does not affect the flow direction of the fluid. However, when there is fluid backflow, the ball 14 is moved by force until the outer side of the ball 14 contacts the inclined section 113, thereby blocking the connection between outflow section 111 and outflow section 212.
[0040] Therefore, by setting the ball 14 and the inclined section 113, the connection between the outflow section 111 and the outflow section 2 112 can be blocked when the fluid flows back, thereby avoiding the influence of fluid backflow on the solenoid valve. Secondly, it also enables the solenoid valve to have a check valve function, that is, the function of preventing backflow.
[0041] The main pipe 1 can be formed as a single piece, or it can be split into multiple parts, such as separating the main pipe 1 with the outflow channel 11 and the main pipe 1, and connecting them with threads.
[0042] like Figures 2-4 As shown, when the ball 14 rolls in the second outflow section 112, a limiting component is also set to prevent the ball 14 from detaching from the second outflow section 112. The specific structure is as follows: First, a limiting plate 13 is set at the end of the second outflow section 112 away from the first outflow section 111, and the limiting plate 13 has a hole 133 for fluid flow, and the limiting plate 13 is used to prevent the ball 14 from detaching from the second outflow section.
[0043] The limiting plate 13 includes a limiting part 131 and a connecting part 132 located outside the limiting part 131. There are four connecting parts 132, and there is a hole 133 between two adjacent connecting parts 132. The connecting part 132 is threadedly connected to the outflow section 112.
[0044] Therefore, in actual use, it can be installed as long as it is threaded. At the same time, the limiting part 131 mainly plays a limiting role, while the connecting part 132 plays a connecting role and can form a hole 133. The arrangement of multiple connecting parts 132 makes the connection more stable and can also play a role in diverting the flow.
[0045] Furthermore, a step 114 is provided between the outflow section 111 and the inclined section 113, thereby increasing the space of the outflow section 111 and preventing the ball bearings 14 from affecting the normal flow direction.
[0046] like Figures 5-7 As shown, a diaphragm 2 is installed between the main pipe 1 and the control component, and the diaphragm 2 has through holes 21 and 22 corresponding to the outflow channel 11 and the inflow channel 12, respectively. Therefore, in actual use, the flow rate can be adjusted by changing the diameter of through holes 21 and 22.
[0047] Moreover, the structure of the diaphragm 2 is as follows: First, a protrusion 23 is provided at the bottom of the diaphragm 2, and an installation platform 15 is provided on the main pipe 1. The installation platform 15 has a groove in the middle and is connected to the outflow channel 11 and the inflow channel 12. The bottom of the installation platform 15 has a slot 151 corresponding to the protrusion 23.
[0048] Therefore, in actual use, the connection is achieved by the matching of the protrusion 23 and the slot 151.
[0049] Meanwhile, a collar 24 is built into the through hole 21, and a protruding plate 241 is provided on the outer side of both ends of the collar 24, and the protruding plate 241 is attached to the outer surface of the diaphragm 2.
[0050] Therefore, in actual use, the setting of the collar 24 avoids the moving iron core 7 of the control component from directly contacting the diaphragm 2, thereby playing a certain role in buffering and preventing wear.
[0051] Secondly, the diaphragm 2 is designed to balance the air pressure on both sides, thus preventing air leakage. This is because the electromagnetic component relies on the magnetic force generated by the spring 10 and the magnetic field to move the moving iron core 7. If the spring 10 is not elastic enough, the moving iron core 7 may not be able to return to its original position, resulting in air leakage. The diaphragm 3 increases the contact area, thereby balancing the air pressure and reducing the air pressure resistance on the spring 10, thus allowing the moving iron core 7 to return to its original position more effectively.
[0052] like Figures 5-7As shown, the structure of the control component is as follows: First, the control component includes a base 3 and a housing 4. The bottom of the base 3 is connected to the main pipe 1, and a channel 31 is opened in the middle of the base 3. The channel 31 contains a moving iron core 7. The top of the base 3 is fitted with a coil seat 5, and a coil is wound around the outside of the coil seat 5. The coil seat 5 contains a stationary iron core 6, and the stationary iron core 6 is located above the moving iron core 7.
[0053] Meanwhile, the outer casing 4 is located outside the coil. Therefore, in actual use, the bottom of the moving iron core 7 is located at the opening of the outflow channel 11, thereby blocking the connection between the outflow channel 11 and the inflow channel 12. By energizing the coil, a magnetic field is generated between the moving iron core 7 and the stationary iron core 6, which in turn drives the moving iron core 7 to move, thereby connecting the outflow channel 11 and the inflow channel 12.
[0054] The outer shell 4 is integrally injection molded onto the outside of the coil. Therefore, the outer shell 4 is not pre-molded and then installed, but directly injection molded onto the outside of the coil. This design makes the magnetic field more stable and the sealing performance better.
[0055] Furthermore, a spring 10 is provided between the moving iron core 7 and the stationary iron core 6, and the spring 10 is used to reset the moving iron core 7 after it has been moved. Therefore, when the moving iron core 7 moves to connect the outflow channel 11 and the inflow channel 12, the spring 10 is compressed. So after the coil is de-energized, the elasticity of the spring 10 will drive the moving iron core 7 to move.
[0056] Secondly, both the top and bottom of the coil base 5 are provided with protrusions 51, and the control component also includes a bracket 8, which is located between the coil base 5 and the housing 4. A terminal 81 is provided on one side of the bracket 8, and the terminal 81 passes through the housing 4 and protrudes. The bracket 8 is C-shaped and includes two mounting plates 82 and a connecting plate 83 for connecting the two mounting plates 82. The mounting plate 82 has an opening in the middle and a snap-fit groove 821 corresponding to the protrusion 51.
[0057] Therefore, in actual use, the coil base 5 and the bracket 8 are connected by the protrusion 51 and the snap-fit groove 821, and the wire connector 81 makes it easier for the coil end to pass through and separates the coil end and the bracket 8, thereby protecting the coil from wear between the coil and the bracket 8. Moreover, the bracket 8 plays a certain role in limiting the injection molding of the outer shell 4.
[0058] Meanwhile, one end of the stationary iron core 6 is threaded to the base 3, and the other end of the stationary iron core 6 passes through the outer casing 4 and is connected to a knob 9. Therefore, during installation, all components except the base 3 and the moving iron core 7 are assembled first to form a whole. Then, the base 3 is connected to the main pipe 1, and the moving iron core 7 is placed inside the base 3. Finally, the previously assembled whole is placed on the top outer side of the base 3, and the stationary iron core 6 is connected to the base 3 by rotating the knob 9. This design facilitates installation and replacement.
[0059] like Figure 8 As shown, since the diaphragm 2 can add functions but is not necessary, when the diaphragm 2 is not present, the control assembly includes the housing 4, coil seat 5, stationary iron core 6 and moving iron core 7. The top of the main pipe 1 is provided with a placement channel 16 that communicates with the outflow channel 11 and the inflow channel 12. The moving iron core 7 is built into the placement channel 16. The top of the main pipe 1 is fitted with the coil seat 5, and a coil is wound around the outside of the coil seat 5. The stationary iron core 6 is built into the coil seat 5 and is located above the moving iron core 7.
[0060] Meanwhile, the outer casing 4 is located outside the coil. Therefore, in actual use, the bottom of the moving iron core 7 is located at the opening of the outflow channel 11, thereby blocking the connection between the outflow channel 11 and the inflow channel 12. By energizing the coil, a magnetic field is generated between the moving iron core 7 and the stationary iron core 6, which in turn drives the moving iron core 7 to move, thereby connecting the outflow channel 11 and the inflow channel 12.
[0061] Therefore, compared with the one with diaphragm 2, the one without diaphragm 2 has the base 3 integrally molded on the main pipe 1, but the other structures are basically the same. So the detailed structure of the one without diaphragm 2 can also refer to the one with diaphragm 2. That is, the outer shell 4 is integrally molded on the outside of the coil by injection molding, and a spring 10 is provided between the moving iron core 7 and the stationary iron core 6. Moreover, the control component also includes a bracket 8, and one end of the stationary iron core 6 is threaded to the base 3, and the other end of the stationary iron core 6 passes through the outer shell 4 and is connected to a knob 9.
[0062] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. However, this utility model is not limited to the above embodiments; therefore, various changes and modifications can be made without departing from the principles and scope of this utility model, and all such changes and modifications fall within the scope of the claimed utility model.
Claims
1. An electromagnetic valve with a check valve function, characterized by comprising: The utility model provides a valve, including valve body, and valve body includes main pipeline (1) and control assembly set up on main pipeline (1), wherein main pipeline (1) is opened with flow out channel (11) and flow in channel (12), and control assembly is used to control whether flow out channel (11) and flow in channel (12) are communicated or not; The inner wall of the flow out channel (11) is divided into a flow out section one (111) and a flow out section two (112), and the caliber of the flow out section one (111) is smaller than that of the flow out section two (112), and an inclined section (113) is arranged between the flow out section one (111) and the flow out section two (112), the main pipeline (1) is internally provided with a ball (14), and the ball (14) rolls in the flow out section two (112), when there is fluid backflow, the ball (14) is forced to move until the outside of the ball (14) contacts the inclined section (113), thereby blocking the communication between the flow out section one (111) and the flow out section two (112).
2. The solenoid valve with a check valve function according to claim 1, characterized in that: The flow out section two (112) is provided with a limiting plate (13) at an end away from the flow out section one (111), the limiting plate (13) is provided with a hole (133) for fluid flow, and the limiting plate (13) is used to prevent the ball (14) from escaping from the flow out section two (112).
3. The solenoid valve with a check valve function according to claim 2, characterized in that: The limiting plate (13) comprises a limiting portion (131) and a connecting portion (132) located outside the limiting portion (131), wherein the connecting portion (132) is four, and the adjacent two connecting portions (132) are the hole (133), and the connecting portion (132) and the flow out section two (112) are screw connected.
4. The solenoid valve with a check valve function according to claim 1, characterized in that: A step (114) is arranged between the flow out section one (111) and the inclined section (113).
5. The solenoid valve with a check valve function according to any one of claims 1 to 4, characterized in that: The main pipeline (1) and the control assembly are provided with a diaphragm (2), and the diaphragm (2) is provided with a through hole one (21) and a through hole two (22) corresponding to the flow out channel (11) and the flow in channel (12), respectively, and the diameter of the through hole one (21) and the through hole two (22) can be changed to adjust the flow.
6. The solenoid valve with a check valve function according to claim 5, characterized in that: The diaphragm (2) is provided with a protrusion (23) at the bottom, the main pipeline (1) is provided with a mounting table (15), the middle part of the mounting table (15) is slotted and connected with the flow out channel (11) and the flow in channel (12), and the bottom of the mounting table (15) is provided with a clamping groove (151) corresponding to the protrusion (23); Or / and, the through hole one (21) is internally provided with a sleeve ring (24), and the two ends of the sleeve ring (24) are provided with a lug (241) outside, and the lug (241) is attached to the outer surface of the diaphragm (2).
7. The electromagnetic valve with a check valve function according to claim 5, characterized in that: The control assembly comprises a base (3) and a shell (4), and the diaphragm (2) is located between the base (3) and the main pipeline (1), the bottom of the base (3) is connected with the main pipeline (1), the middle part of the base (3) is provided with a channel (31), and the channel (31) is internally provided with a moving iron core (7), the top of the base (3) is provided with a coil seat (5), the outer side of the coil seat (5) is wound with a coil, and the coil seat (5) is internally provided with a static iron core (6), and the static iron core (6) is located above the moving iron core (7). The shell (4) is located outside the coil, and the bottom of the moving iron core (7) is located at the opening of the outflow channel (11) to block the communication between the outflow channel (11) and the inflow channel (12), and the moving iron core (7) is driven to move to communicate the outflow channel (11) and the inflow channel (12) by energizing the coil to generate a magnetic field between the moving iron core (7) and the static iron core (6).
8. The solenoid valve with a check valve function according to claim 7, characterized in that: The spring (10) is arranged between the moving iron core (7) and the static iron core (6), and the spring (10) is used to reset the moving iron core (7) after moving; Or / and, the top and bottom of the coil seat (5) are provided with protrusions (51), and the control assembly further comprises a bracket (8), and the bracket (8) is located between the coil seat (5) and the shell (4), and one side of the bracket (8) is provided with a terminal (81), and the terminal (81) is exposed by penetrating the shell (4), the bracket (8) is C-shaped and comprises two mounting plates (82) and a connecting plate (83) for connecting the two mounting plates (82), and the mounting plate (82) is provided with a clamping groove (821) corresponding to the protrusion (51) in the middle. Or / and, one end of the static iron core (6) is threadedly connected with the base (3), and the other end of the static iron core (6) penetrates the shell (4) and is connected with a knob (9).
9. The solenoid valve with a check valve function according to any one of claims 1 to 4, characterized in that: The control assembly comprises a shell (4), a coil seat (5), a static iron core (6) and a moving iron core (7), and the top of the main pipeline (1) is provided with a placement channel (16) in communication with the outflow channel (11) and the inflow channel (12), and the placement channel (16) is built-in with the moving iron core (7), and the top of the main pipeline (1) is sleeved with the coil seat (5), the outer side of the coil seat (5) is wound with a coil, and the coil seat (5) is built-in with the static iron core (6), and the static iron core (6) is located above the moving iron core (7); The shell (4) is located outside the coil, and the bottom of the moving iron core (7) is located at the opening of the outflow channel (11) to block the communication between the outflow channel (11) and the inflow channel (12), and the moving iron core (7) is driven to move to communicate the outflow channel (11) and the inflow channel (12) by energizing the coil to generate a magnetic field between the moving iron core (7) and the static iron core (6).