Two-way electromagnetic water valve

Abstract

The utility model discloses a two-way electromagnetic water valve which comprises a valve body, a magnetic winding assembly is arranged in the valve body, a connecting rod is movably arranged in the valve body, the upper end of the connecting rod is connected with the magnetic winding assembly in a matched mode, a sealing gasket is arranged at the lower end of the connecting rod, and the sealing gasket is driven by the connecting rod to be used for opening or closing a circulation channel. The valve further comprises a balance diaphragm made of flexible materials, the balance diaphragm is arranged on the connecting rod in a sleeving mode, the periphery of the balance diaphragm is fixed to the valve body, and the balance diaphragm can deform in the vertical moving process of the connecting rod. The balance diaphragm made of the flexible material is arranged on the connecting rod, the periphery of the balance diaphragm is fixed on the valve body, the balance diaphragm can deform under the action of water pressure when the connecting rod moves up and down, the resistance influence of the water pressure on the movement of the connecting rod is balanced through the deformation of the balance diaphragm, and the use effect is good.

Description

Technical Field

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

[0002] The core of a solenoid valve lies in the switching of the relationship between electromagnetic force, spring force, and the resistance generated by water pressure on the moving structure. The opening and closing of a two-way solenoid water valve is essentially a change in the relationship between the electromagnetic force and the combined force of the other two loads, causing the solenoid valve's linkage structure to move, thereby opening or closing the flow channel.

[0003] Due to the limited space and power constraints of solenoid valves, there is not much room for improvement in electromagnetic force. Water pressure generates resistance to the movement of the connecting rod structure, and this resistance changes with the water pressure. The higher the water pressure, the greater the resistance, and the greater the electromagnetic force required. Water pressure is one of the core performance indicators of solenoid valves. Therefore, how to balance the resistance generated by water pressure on the movement of the connecting rod under a certain electromagnetic force has become an urgent technical problem to be solved. At present, there is no relevant research. Summary of the Invention

[0004] In view of the existing technical problems, this utility model provides a two-way electromagnetic water valve to solve the problems in the prior art.

[0005] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0006] A two-way electromagnetic water valve includes a valve body with a wound magnetic assembly inside. A connecting rod is movably mounted inside the valve body, with its upper end connected to the wound magnetic assembly and its lower end having a sealing gasket. The sealing gasket is used to open or close the flow channel under the action of the connecting rod. The valve body also includes a balancing diaphragm made of flexible material, which is sleeved on the connecting rod and its outer periphery is fixed to the valve body. The balancing diaphragm can deform during the up-and-down movement of the connecting rod.

[0007] In the above technical solution, when the connecting rod moves up and down during use, the diaphragm will deform under the action of water pressure. The deformation of the diaphragm balances the resistance effect of water pressure on the movement of the connecting rod.

[0008] Preferably, the balancing diaphragm includes a diaphragm body, which is generally in the shape of a disc. The balancing diaphragm has a central mounting hole through which the connecting rod passes. The diaphragm body includes, from the inside out, a follower part, a deformation part, and a sealing part. The inner side of the follower part is connected to the sidewall of the central mounting hole, the outer side of the follower part is connected to the inner side of the deformation part, and the outer side of the deformation part is connected to the sealing part.

[0009] Preferably, the deformable part is located lower than the follower part and the sealing part, and the connection between the deformable part and the follower part and the sealing part is an arc-shaped structure.

[0010] Preferably, the sidewall of the central mounting hole extends axially along the diaphragm body to form a boss, and the extension direction of the boss is opposite to the extension direction of the deformed part.

[0011] The protrusion ensures that the diaphragm remains tightly connected to the connecting rod during deformation.

[0012] Preferably, the connecting rod includes a rod portion and a piston portion located at the lower end of the rod portion. The piston portion is provided with a first platform, a second platform, a third platform, and a fourth platform in sequence from top to bottom. A first annular groove is formed between the first platform and the second platform, and the diaphragm body is installed on the first annular groove. A second annular groove is formed between the second platform and the third platform, and a third annular groove is formed between the third platform and the fourth platform. The sealing gasket is installed on the third annular groove. A flow guiding channel is symmetrically provided around the rod portion in the middle of the piston portion.

[0013] With this configuration, the boss of the diaphragm is installed at the first annular groove. In the undeformed state, the deformable part of the diaphragm is located above the second platform, and at least part of the lower end face of the follower part is in contact with the second platform. When the solenoid valve is energized, the connecting rod moves down and the diaphragm deforms. When it moves to the limit position, under the action of the water valve, the water flow will flow from the guide channel of the piston part to the diaphragm, generating water pressure on the diaphragm and squeezing the diaphragm to restore it to the connection state before deformation, that is, part of the lower end face of the follower part is in contact with the second platform, and pressure balance is achieved at this time.

[0014] Preferably, the valve body includes an upper valve body and a lower valve body, which are connected by a pin and sealed by an O-ring, and are also laser-welded. This configuration ensures structural strength while preventing external leakage of the solenoid valve.

[0015] Preferably, the magnetic winding assembly includes a frame, a coil, a moving iron core, and a stationary iron core disposed in the upper valve body. The coil is wound on the frame, and the upper end of the connecting rod passes through the stationary iron core and is connected to the moving iron core. The moving iron core and the stationary iron core are fitted with a concave-convex structure, and the height ratio of the moving iron core to the stationary iron core is 2:3.

[0016] Preferably, the upper end of the stationary iron core is provided with a convex structure, and the lower end of the moving iron core is provided with a concave structure that cooperates with the convex structure. The cross-sections of the convex structure and the concave structure are both conical, and the taper of the convex structure and the concave structure are different.

[0017] Preferably, a magnetic sleeve is provided between the coil and the upper valve body, and a magnetic plate is provided at the lower end of the coil. Magnetic holes are evenly distributed on the magnetic sleeve and the magnetic plate.

[0018] Preferably, the lower end of the connecting rod is connected to a non-circular helical spring, which is located in the lower valve body. The lower end of the non-circular helical spring abuts against the lower valve body, and its upper end abuts against the connecting rod. The helical diameter of the lower end of the non-circular helical spring is larger than the helical diameter of its upper end.

[0019] This configuration, using a non-circular helical spring with low initial stiffness and high final stiffness, ensures that the spring force and electromagnetic force highly overlap, further reducing the initial preload and guaranteeing the switching response performance of the electromagnetic force.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model sets up a balance diaphragm made of flexible material, which is installed on the connecting rod and its outer periphery is fixed to the valve body. When the connecting rod moves up and down, the balance diaphragm will deform under the action of water pressure. The deformation of the balance diaphragm balances the resistance effect of water pressure on the movement of the connecting rod, resulting in better performance. Attached image description:

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is an internal sectional view of the present invention when it is in the open state;

[0023] Figure 3 This is an internal sectional view of the present invention when it is in the closed state;

[0024] Figure 4 This is a diagram showing the deformation state of the diaphragm at a certain instant during the movement of the connecting rod;

[0025] Figure 5 for Figure 1 A longitudinal cross-sectional view of the balancing diaphragm in the middle;

[0026] Figure 6 for Figure 1 A schematic diagram of the connecting rod in the diagram. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to experimental examples and specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0028] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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.

[0029] As attached Figure 1 -Appendix Figure 6 The illustrated two-way solenoid water valve includes a valve body. In this embodiment, the valve body comprises an upper valve body 100 and a lower valve body 101, which are connected by a pin and sealed by an O-ring. Laser welding is employed to ensure structural strength and prevent external leakage of the solenoid valve. The lower valve body 101 has an inlet and an outlet. When the inlet and outlet are connected, the flow channel is open; when they are not connected, the flow channel is closed. A magnetic winding assembly is installed inside the upper valve body 100, and a connecting rod 1 is movably installed inside the lower valve body 101. The upper end of the connecting rod 1 is connected to the magnetic winding assembly, and the lower end of the connecting rod 1 has a sealing gasket 3. This sealing gasket 3, driven by the connecting rod 1, is used to open or close the flow channel. A spring 4 is connected to the lower end of the connecting rod 1. The spring 4 is located inside the lower valve body 101, with its lower end abutting against the lower valve body 101 and its upper end abutting against the connecting rod 1. In this embodiment, spring 4 is an irregularly shaped helical spring, meaning that the helical diameter at the lower end of the irregularly shaped helical spring is larger than that at the upper end. By using an irregularly shaped helical spring, the initial stiffness of the spring is small, while the stiffness at the end is large, so that the spring force and the electromagnetic force are highly coincident, further reducing the preload in the initial section and ensuring the switching response performance of the electromagnetic force.

[0030] The two-way solenoid water valve in this embodiment also includes a balance diaphragm 2 made of flexible material. The balance diaphragm 2 is sleeved on the connecting rod 1, and the outer periphery of the balance diaphragm 2 is fixed on the valve body. The balance diaphragm 2 can deform during the up-and-down movement of the connecting rod 1.

[0031] from Figure 5 As can be seen, the diaphragm 2 includes a diaphragm body, which is generally disc-shaped. The diaphragm 2 has a central mounting hole 21 through which the connecting rod 1 passes. The diaphragm body includes, from the inside out, a follower part 22, a deformation part 23, and a sealing part 24. The inner side of the follower part 22 is connected to the side wall of the central mounting hole 21, the outer side of the follower part 22 is connected to the inner side of the deformation part 23, and the outer side of the deformation part 23 is connected to the sealing part 24. The deformation part 23 is located lower than the positions of the follower part 22 and the sealing part 24. A pressure ring 42 is provided inside the lower valve body 101, and the sealing part 24 is embedded between the pressure ring 42 and the lower end face of the stationary iron core 5.

[0032] The deformation section 23 has a U-shaped structure, and the connection between the deformation section 23, the follower section 22, and the sealing section 24 is an arc-shaped structure. The sidewall of the central mounting hole 21 extends along the axial direction of the diaphragm body to form a boss. The extension direction of the boss is opposite to the extension direction of the deformation section 23. The setting of the boss ensures that the balancing diaphragm is always tightly connected to the connecting rod during the deformation process.

[0033] from Figure 6 Combination Figure 2 and Figure 3 As can be seen, the connecting rod 1 includes a rod portion 15 and a piston portion located at the lower end of the rod portion 15. The piston portion has, from top to bottom, a first platform 11, a second platform 12, a third platform 13, and a fourth platform 14. The first platform 11, second platform 12, third platform 13, and fourth platform 14 are concentric discs. The diameter of the first platform 11 is smaller than the diameter of the second platform 12, the diameter of the second platform 12 is smaller than the diameter of the third platform 13, and the diameter of the fourth platform 14 is smaller than the diameter of the third platform 13 but larger than the diameter of the first platform 11. A first annular groove is formed between the second platform 12 and the third platform 13. The diaphragm body is installed in this first annular groove, specifically, the central mounting hole of the diaphragm body is fitted into the first annular groove. A second annular groove is formed between the second platform 12 and the third platform 13, and a third annular groove is formed between the third platform 13 and the fourth platform 14. The sealing gasket 3 is installed in the third annular groove. The sealing gasket 3 and the third annular groove of the connecting rod 1 are connected by a double-sided vulcanization process, which ensures the bidirectional axial and radial limiting of the sealing gasket, and ensures the reliability of the connection between the sealing gasket and the connecting rod, the sealing performance of the sealing gasket during sealing, and the amount of deformation. A flow guide channel 16 is symmetrically provided around the rod 15 in the middle of the piston part. The flow guide channel 16 is set through the piston part from top to bottom. In this embodiment, a total of four flow guide channels 16 are provided. The arrangement of the flow guide channels 16 ensures that the pressure impact energy is instantly transmitted to the balance diaphragm, reducing the opening and closing response time of the solenoid valve.

[0034] With this configuration, the boss of the balancing diaphragm is installed at the first annular groove. In the undeformed state, the deformable part 23 of the balancing diaphragm is located above the second platform 12. At least part of the lower end face of the follower part 22 is in contact with the second platform 12. When the solenoid valve is energized, the connecting rod 1 moves down and the balancing diaphragm deforms. When it moves down to the limit position, under the action of the water valve water pressure, the water flow will flow from the guide channel 16 of the piston part to the balancing diaphragm, generating water pressure on the balancing diaphragm and squeezing the balancing diaphragm to restore the balancing diaphragm to the connection state before deformation, that is, part of the lower end face of the follower part 22 is in contact with the second platform 12, and pressure balance is achieved at this time.

[0035] from Figures 1-3As can be seen, the magnetic winding assembly includes a frame 81, a coil 7, a moving iron core 6, and a stationary iron core 5, all housed within the upper valve body 100. The coil 7 is wound around the frame 81, and the pin is located at the upper end of the upper valve body 100. The coil 7 and the pin are connected using resistance welding, resulting in high production efficiency, good welding quality, and ease of automation. The upper end of the connecting rod 1 passes through the stationary iron core 5 and connects with the moving iron core 6. The moving iron core 6 and the stationary iron core 5 use a concave-convex structure, and the height ratio of the moving iron core 6 to the stationary iron core 5 is 2:3. The upper end of the stationary iron core 5 has a convex structure, and the lower end of the moving iron core 6 has a concave structure that matches the convex structure. Both the convex and concave structures have tapered cross-sections, but with different tapers, thus solving the problem of incomplete adsorption and lateral engagement jamming caused by the eccentricity of the solenoid valve.

[0036] A magnetic sleeve 82 is provided between the coil 7 and the upper valve body 100, and a magnetic plate 83 is provided at the lower end of the coil 7. Magnetic holes are evenly distributed on the magnetic sleeve 82 and the magnetic plate 83 to ensure uniform magnetic field distribution and suppress the eccentricity problem of the solenoid valve. The coil 7, frame 81, magnetic sleeve 82, and magnetic plate 83 are integrally injection molded with the valve body, effectively protecting the coil from corrosion, oxidation, and other damage, reducing assembly errors, suppressing the eccentricity problem of the solenoid valve, and providing better thermal conductivity.

[0037] A magnetic shielding sleeve 8 is provided between the frame 81 and the stationary iron core 5 and the moving iron core 6. The stationary iron core 5 and the moving iron core 6 are located inside the magnetic shielding sleeve 8. The magnetic shielding sleeve 8 and the stationary iron core 5 are welded together after interference fit. At the same time, an O-ring seal is provided at the connection to ensure the reliability of the connection and the sealing of the electromagnetic exposure.

[0038] After energization, the connecting rod moves downward from its initial position, and the follower 22 region begins to deform and fold upward. The contact point between the follower 22 and the connecting rod 1 gradually separates, resembling a W-shape, as the connecting rod continues to move downward (see...). Figure 4 The deformation section 23 area changes from the original U shape to a similar L shape (at a certain moment), which satisfies the displacement stroke of the connecting rod. When the connecting rod 1 moves down to the limit position, water flows out from the guide channel 16 in the middle of the connecting rod 1 and is transmitted to the upper side of the balance diaphragm, generating water pressure on the balance diaphragm. The water pressure squeezes the balance diaphragm, causing the follower section 22 area to re-fit against the second platform 12 of the connecting rod. Then the balance diaphragm returns to its original shape, achieving pressure balance.

[0039] The preferred embodiments of this utility model have been described above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A two-way electromagnetic water valve, comprising a valve body, wherein a magnetic winding assembly is disposed within the valve body, and a connecting rod (1) is movably disposed within the valve body, the upper end of the connecting rod (1) being connected to the magnetic winding assembly, and a sealing gasket (3) being disposed at the lower end of the connecting rod (1), the sealing gasket (3) being used to open or close the flow channel under the action of the connecting rod (1), characterized in that: The balance diaphragm (2) is made of flexible material, is sleeved on the connecting rod (1), and the outer periphery of the balance diaphragm (2) is fixed on the valve body, and the balance diaphragm (2) can be deformed during the up-down movement of the connecting rod (1).

2. The two-way electromagnetic water valve according to claim 1, characterized by: The balance diaphragm (2) comprises a diaphragm body which is in a disc structure as a whole, the balance diaphragm (2) has a center installation hole (21) through which the connecting rod (1) passes, and the diaphragm body comprises, from inside to outside, a follower part (22), a deformation part (23) and a sealing part (24), the inner side of the follower part (22) is connected with the side wall of the center installation hole (21), the outer side of the follower part (22) is connected with the inner side of the deformation part (23), and the outer side of the deformation part (23) is connected with the sealing part (24).

3. The two-way electromagnetic water valve according to claim 2, characterized by: The position of the deformation part (23) is lower than the positions of the follower part (22) and the sealing part (24), and the connections between the deformation part (23) and the follower part (22) and the sealing part (24) are all in arc structures.

4. The two-way electromagnetic water valve according to claim 3, characterized by: The side wall of the center installation hole (21) extends along the axial direction of the diaphragm body to form a boss, and the extension direction of the boss is opposite to the extension direction of the deformation part (23).

5. The two-way electromagnetic water valve according to claim 2, characterized by: The connecting rod (1) comprises a rod part (15) and a piston part at the lower end of the rod part (15), the piston part comprises, from top to bottom, a first table surface (11), a second table surface (12), a third table surface (13) and a fourth table surface (14), a first ring groove is formed between the first table surface (11) and the second table surface (12), the diaphragm body is installed on the first ring groove, a second ring groove is formed between the second table surface (12) and the third table surface (13), a third ring groove is formed between the third table surface (13) and the fourth table surface (14), the sealing gasket (3) is installed on the third ring groove, and flow guide channels (16) are symmetrically arranged around the rod part (15) in the middle part of the piston part.

6. The two-way electromagnetic water valve according to claim 2, characterized by: The valve body comprises an upper valve body (100) and a lower valve body (101), the upper valve body (100) and the lower valve body (101) are connected by a latch and sealed by an O-shaped sealing ring, and laser welding is adopted.

7. The two-way electromagnetic water valve according to claim 6, characterized in that: The magnetic assembly comprises a framework (81), a coil (7), a moving iron core (6) and a static iron core (5) arranged in the upper valve body (100), the coil (7) is wound on the framework (81), the upper end of the connecting rod (1) is connected with the moving iron core (6) after passing through the static iron core (5), the moving iron core (6) and the static iron core (5) are matched by concave-convex structures, and the height ratio of the moving iron core (6) to the static iron core (5) is 2:

3.

8. The two-way electromagnetic water valve according to claim 7, characterized in that: The upper end of the static iron core (5) is provided with a convex structure, the lower end of the moving iron core (6) is provided with a concave structure matched with the convex structure, the cross sections of the convex structure and the concave structure are both in conical shapes, and the tapers of the convex structure and the concave structure are different.

9. The two-way electromagnetic water valve according to claim 8, characterized in that: A magnetic conducting sleeve (82) is arranged between the coil (7) and the upper valve body (100), and a magnetic conducting plate (83) is arranged at the lower end of the coil (7), and the magnetic conducting sleeve (82) and the magnetic conducting plate (83) are uniformly provided with magnetic conducting holes.

10. The two-way electromagnetic water valve according to claim 7, characterized by: The lower end of the connecting rod (1) is connected with a special-shaped coil spring (4), the special-shaped coil spring (4) is located in the lower valve body (101), the lower end of the special-shaped coil spring (4) abuts against the lower valve body (101), the upper end of the special-shaped coil spring (4) abuts against the connecting rod (1), and the spiral diameter of the lower end of the special-shaped coil spring (4) is greater than that of the upper end.

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