Two-way electromagnetic water valve

Abstract

The two-way electromagnetic water valve 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. By arranging the balance diaphragm made of the flexible material, the balance diaphragm is installed on the connecting rod, the periphery of the balance diaphragm is fixed to the valve body, when the connecting rod moves up and down, the balance diaphragm can deform under the action of water pressure, the resistance influence of the water pressure on the movement of the connecting rod is balanced through deformation of the balance diaphragm, and the use effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of solenoid valves, and particularly to a two-way electromagnetic water valve. Background Art

[0002] The core of a solenoid valve is the switching of the relationship among electromagnetic force, spring force, and the resistance generated by water pressure on the moving structure. The opening and closing of a two-way electromagnetic water valve are essentially the change of the relationship between electromagnetic force and the resultant force of the other two loads, which causes the connecting rod of the solenoid valve to move, and then realizes the connection or closing of the flow channel.

[0003] Under the limited space and power limitation of the solenoid valve, the improvement space of electromagnetic force is not large; water pressure will generate resistance to the movement of the connecting rod structure, and this resistance will change with the change of water pressure. The greater the water pressure, the greater the resistance, and the greater the required electromagnetic force. And water pressure is one of the core performance indicators of the solenoid valve. Therefore, how to balance the resistance generated by water pressure on the movement of the connecting rod when the electromagnetic force is certain has become an urgent technical problem to be solved, and there is no relevant research at present. Summary of the Invention

[0004] Aiming at the existing technical problems, the present invention provides a two-way electromagnetic water valve to solve the problems in the prior art.

[0005] In order to achieve the above-mentioned invention purpose, the present invention provides the following technical solutions: A two-way electromagnetic water valve includes a valve body, in which a magnetic winding assembly is provided. 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 matching manner. A sealing gasket is arranged at the lower end of the connecting rod. The sealing gasket is used to open or close the flow channel under the drive of the connecting rod. It further includes a balance diaphragm made of flexible material. The balance diaphragm is sleeved on the connecting rod, and the outer periphery of the balance diaphragm is fixed on the valve body. The balance diaphragm can be deformed during the up and down movement of the connecting rod.

[0006] In the above technical solution, during the use process, when the connecting rod moves up and down, the balance diaphragm will be deformed under the action of water pressure, and the resistance effect generated by water pressure on the movement of the connecting rod is balanced through the deformation of the balance diaphragm.

[0007] Preferably, the balance diaphragm includes a diaphragm body, which is integrally in a disc-shaped structure. The balance diaphragm has a central mounting hole, and the connecting rod passes through the central mounting hole. The diaphragm body includes a follower part, a deformation part, and a sealing part in sequence from the inside to the outside. The inner side of the follower part is connected with the side wall of the central mounting hole, the outer side of the follower part is connected with the inner side of the deformation part, and the outer side of the deformation part is connected with the sealing part.

[0008] Preferably, the position of the deformation part is lower than the positions of the follower part and the sealing part.

[0009] Preferably, the deformation part has a U-shaped structure, and the connections between the deformation part and the follower part and the sealing part are both arc-shaped structures.

[0010] Preferably, a boss is formed after the side wall of the central mounting hole extends along the axial direction of the diaphragm body, and the extending direction of the boss is opposite to the extending direction of the deformation part.

[0011] The setting of the boss ensures the tight connection between the balance diaphragm and the connecting rod during the deformation process.

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

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

[0014] Preferably, the valve body includes an upper valve body and a lower valve body. The upper valve body and the lower valve body are connected by pins and sealed by an O-ring seal, and at the same time, circumferential laser welding is adopted. With such a setting, the structural strength is ensured, and at the same time, the external leakage problem of the solenoid valve is prevented.

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

[0016] Preferably, the upper end of the static iron core is provided with a convex structure, and the lower end of the moving iron core is provided with a concave structure matching 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 is different.

[0017] Preferably, a pressure ring is provided inside the lower valve body, and the sealing portion is embedded between the pressure ring and the lower end face of the static iron core.

[0018] Preferably, a magnetic conduction sleeve is provided between the coil and the upper valve body, a magnetic conduction plate is provided at the lower end of the coil, and magnetic conduction holes are uniformly distributed on the magnetic conduction sleeve and the magnetic conduction plate respectively.

[0019] Preferably, a magnetic isolation sleeve is provided between the skeleton, the static iron core and the moving iron core. The static iron core and the moving iron core are located inside the magnetic isolation sleeve, and the magnetic isolation sleeve and the static iron core are welded after interference fitting, and an O-ring seal is provided at the connection.

[0020] This setting ensures the reliability of the connection relationship and the electromagnetic external leakage seal.

[0021] Preferably, the coil and the Pin needle are connected by a resistance welding process.

[0022] This setting has high production efficiency, good welding quality and is easy to automate.

[0023] Preferably, the coil, the skeleton, the magnetic conduction sleeve and the magnetic conduction plate are integrally injection molded with the valve body.

[0024] This setting effectively protects the coil from corrosion, oxidation and other damages, can reduce the assembly error, suppress the eccentricity problem of the solenoid valve, and has better heat conduction performance.

[0025] Preferably, the lower end of the connecting rod is connected to a spring. The spring is located inside the lower valve body. The lower end of the spring abuts against the inside of the lower valve body, and its upper end abuts against the connecting rod.

[0026] Preferably, the spring is a special-shaped spiral spring, and the spiral diameter of the lower end of the special-shaped spiral spring is larger than that of the upper end.

[0027] This setting uses a special-shaped spiral spring. The initial stiffness of the spring is small and the end stiffness is large, so that the spring force coincides with the electromagnetic force, further reducing the pre-tightening force of the initial stage and ensuring the switching response performance of the electromagnetic force.

[0028] Preferably, the sealing gasket and the connecting rod are connected by a double-sided vulcanization process.

[0029] This setting ensures the two-way limit of the sealing gasket in the axial and radial directions, and ensures the connection reliability of the sealing gasket and the connecting rod, the sealing performance and the deformation amount of the sealing gasket during sealing.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows: By providing a balance diaphragm made of a flexible material, the balance diaphragm is installed on the connecting rod, and its outer periphery is fixed on 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 the water pressure on the movement of the connecting rod, and the use effect is better. Description of the Drawings

[0031] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is an internal cross-sectional view of the present invention when it is in the open state; Figure 3 is an internal cross-sectional view of the present invention when it is in the closed state; Figure 4 is a diagram showing the deformation state of the balance diaphragm at a certain moment during the movement of the connecting rod; Figure 5 is Figure 1 a longitudinal cross-sectional view of the balance diaphragm in Figure 6 is Figure 1 a schematic diagram of the structure of the connecting rod in Detailed Embodiments

[0032] The present invention will be further described in detail below in conjunction with test examples and specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments. All technologies implemented based on the content of the present invention belong to the scope of the present invention.

[0033] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "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 drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0034] As shown in the attached Figure 1 - attached Figure 6A two-way electromagnetic water valve as shown includes a valve body. In this embodiment, the valve body includes 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 pins and sealed with an O-ring. At the same time, circumferential laser welding is adopted to ensure the structural strength and prevent the external leakage problem of the solenoid valve. The lower valve body 101 is provided with a water inlet and a water outlet. When the water inlet and the water outlet are connected, the flow passage is opened, and when the water inlet and the water outlet are not connected, the flow passage is closed. A magnetic winding assembly is arranged in the upper valve body 100, and a connecting rod 1 is movably arranged in the lower valve body 101. The upper end of the connecting rod 1 is cooperatively connected with the magnetic winding assembly, and a sealing gasket 3 is arranged at the lower end of the connecting rod 1. The sealing gasket 3 is used to open or close the flow passage under the drive of the connecting rod 1. The lower end of the connecting rod 1 is connected with a spring 4. The spring 4 is located in the lower valve body 101. The lower end of the spring 4 abuts against the inside of the lower valve body 101, and its upper end abuts against the connecting rod 1. In this embodiment, the spring 4 is an irregular spiral spring, that is, the spiral diameter of the lower end of the spring is larger than that of the upper end. By using an irregular spring, the initial stiffness of the spring is small and the end stiffness is large, so that the spring force coincides with the electromagnetic force highly, further reducing the pre-tightening force of the initial stage and ensuring the switching response performance of the electromagnetic force.

[0035] The two-way electromagnetic water valve of this embodiment further includes a balance diaphragm 2 made of a 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.

[0036] From Figure 5 it can be seen that the balance diaphragm 2 includes a diaphragm body. The diaphragm body is integrally in a disc-shaped structure. The balance diaphragm 2 has a central mounting hole 21. The connecting rod 21 passes through the central mounting hole 21. The diaphragm body includes a follower part 22, a deformation part 23 and a sealing part 24 in sequence from the inside to the outside. 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 position where the deformation part 23 is located is lower than the positions where the follower part 22 and the sealing part 24 are located. A pressure ring 42 is arranged in the lower valve body 101, and the sealing part 24 is embedded between the pressure ring 42 and the lower end face of the static iron core 5.

[0037] In this embodiment, the deformation part 23 is in a U-shaped structure, and the connections between the deformation part 23 and the follower part 22 and the sealing part 24 are both in an arc-shaped structure. The side wall of the central mounting hole 21 extends axially along the diaphragm body to form a convex platform. The extending direction of the convex platform is opposite to the extending direction of the deformation part 23. The setting of the convex platform ensures that the balance diaphragm is always tightly connected to the connecting rod during the deformation process.

[0038] From Figure 6 Combined Figure 2 and Figure 3It can be seen that 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 is successively provided with a first table surface 11, a second table surface 12, a third table surface 13, and a fourth table surface 14 from top to bottom. The first table surface 11, the second table surface 12, the third table surface 13, and the fourth table surface 14 are concentric disk-shaped, and the diameter of the first table surface 11 is smaller than that of the second table surface 12, the diameter of the second table surface 12 is smaller than that of the third table surface 13, the diameter of the fourth table surface 14 is smaller than that of the third table surface 13 and larger than that of the first table surface 11. A first annular groove is formed between the first table surface 11 and the second table surface 12, and the diaphragm body is installed on the first annular groove. Specifically, the central mounting hole of the diaphragm body is sleeved on the first annular groove. A second annular groove is formed between the second table surface 12 and the third table surface 13, and a third annular groove is formed between the third table surface 13 and the fourth table surface 14. The gasket 3 is installed on the third annular groove, and the gasket 3 and the third annular groove of the connecting rod 1 are connected by a double-sided vulcanization process, ensuring the two-way limit of the gasket in the axial and radial directions, and ensuring the connection reliability between the gasket and the connecting rod, the sealing performance and the deformation amount of the gasket during sealing. A diversion channel 14 is symmetrically arranged around the rod portion 15 in the middle of the piston portion. The arrangement of the diversion channel ensures that the pressure impact can be instantaneously transmitted to the balance diaphragm, reducing the switching response time of the solenoid valve.

[0039] With such an arrangement, the convex platform of the balance diaphragm is installed at the first annular groove. When in the undeformed state, the deformed portion 23 of the balance diaphragm is located above the second table surface 12, and at least a part of the lower end surface of the follower portion 22 is in contact with the second table surface 12. When the solenoid valve is energized, the connecting rod 1 moves downward and the balance diaphragm deforms. When it moves to the limit position, under the action of the water pressure of the water valve, the water flow will flow from the diversion channel 14 of the piston portion to the balance diaphragm, generating water pressure on the balance diaphragm, squeezing the balance diaphragm to restore it to the connection state before deformation, that is, a part of the lower end surface of the follower portion 22 is in contact with the second table surface 12, and at this time, pressure balance is achieved.

[0040] From Figures 1-3 It can be seen that the magnetic winding assembly includes a skeleton 81, a coil 7, a moving iron core 6, and a static iron core 5 arranged in the upper valve body 100. The Pin needle is arranged at the upper end of the upper valve body 100, and the coil 7 and the Pin needle are connected by a resistance welding process, which has high production efficiency, good welding quality, and is easy to automate. The coil 7 is wound on the skeleton 81. The upper end of the connecting rod 1 passes through the static iron core 5 and is connected with the moving iron core 6 in a matching manner. The moving iron core 6 and the static iron core 5 are matched with a concave-convex structure, and the height ratio of the moving iron core 6 and the static iron core 5 is 2:3. The upper end of the static iron core 5 is provided with a convex structure, and the lower end of the moving iron core 6 is provided with a concave structure matching 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 is different, solving the problems of incomplete adsorption and lateral suction jamming caused by the eccentricity of the solenoid valve.

[0041] A magnetic conduction sleeve 82 is provided between the coil 7 and the upper valve body 100, and a magnetic conduction plate 83 is provided at the lower end of the coil 7. Magnetic conduction holes are evenly distributed on the magnetic conduction sleeve 82 and the magnetic conduction plate 83 respectively, so that the magnetic field distribution is uniform, and the eccentric problem of the solenoid valve is suppressed. The coil 7, the skeleton 81, the magnetic conduction sleeve 82 and the magnetic conduction plate 83 are integrally injection-molded with the valve body, which effectively protects the coil from corrosion, oxidation and other damages, can reduce the assembly error, suppress the eccentric problem of the solenoid valve, and has better heat conduction performance.

[0042] A magnetic isolation sleeve 8 is provided between the skeleton 81, the static iron core 5 and the moving iron core 6. The static iron core 5 and the moving iron core 6 are located inside the magnetic isolation sleeve 8. The magnetic isolation sleeve 8 and the static iron core 5 are interference-fitted and then welded, and an O-ring seal is provided at their connection to ensure the reliability of the connection relationship and the electromagnetic external seal.

[0043] After being powered on, the connecting rod moves downward from the initial position, and the area of the follower part 22 begins to deform and fold upward. The contact position between the follower part 22 and the connecting rod 1 begins to gradually separate, similar to a W shape. As the connecting rod continues to move downward (see Figure 4 ), the area of the deformation part 23 changes from the original U shape to a shape similar to an L shape (at a certain moment), satisfying the displacement stroke of the connecting rod. When the connecting rod 1 moves downward to the limit position, water flows out from the diversion channel 14 in the middle of the connecting rod 1 and is transmitted to the upper side of the balance diaphragm, generating a water pressure on the balance diaphragm. The water pressure squeezes the balance diaphragm so that the area of the follower part 22 fits the second table surface 12 of the connecting rod again, and then the balance diaphragm returns to its original state to achieve pressure balance.

[0044] The above describes the preferred specific embodiments of the present invention. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present invention based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the protection scope determined by the claims.

Claims

1. A two-way electromagnetic water valve, comprising a valve body, a magnetic winding assembly arranged in the valve body, a connecting rod (1) movably arranged in the valve body, the upper end of the connecting rod (1) being cooperatively connected with the magnetic winding assembly, a sealing gasket (3) being arranged at the lower end of the connecting rod (1), the sealing gasket (3) being used to open or close a flow channel under the drive of the connecting rod (1), characterized in that: It also comprises a balancing diaphragm (2) made of a flexible material, the balancing diaphragm (2) being sleeved on the connecting rod (1), and the outer periphery of the balancing diaphragm (2) being fixed on the valve body, and the balancing diaphragm (2) being able to deform during the upward and downward movement of the connecting rod (1).

2. A two-way electromagnetic water valve according to claim 1, characterized in that: The balancing diaphragm (2) comprises a diaphragm body, which is a disc-shaped structure as a whole. The balancing diaphragm (2) has a central mounting hole (21), and the connecting rod (21) passes through the central mounting hole (21). The diaphragm body comprises a follower part (22), a deformation part (23) and a sealing part (24) from the inside to the outside. 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).

3. A two-way electromagnetic water valve according to claim 2, characterized in that: The position of the deformation portion (23) is lower than the positions of the follower portion (22) and the sealing portion (24).

4. A two-way electromagnetic water valve according to claim 3, characterized in that: The deformation portion (23) is in a U-shaped structure, and the connection between the deformation portion (23), the follower portion (22) and the sealing portion (24) are all in an arc-shaped structure.

5. A two-way electromagnetic water valve according to claim 3, characterized in that: The side wall of the central mounting hole (21) is extended in 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 portion (23).

6. A two-way electromagnetic water valve according to claim 2, characterized in that: The connecting rod (1) comprises a rod portion (15) and a piston portion located at the lower end of the rod portion (15); the piston portion is provided with a first table surface (11), a second table surface (12), a third table surface (13) and a fourth table surface (14) in order from top to bottom; a first annular groove is formed between the first table surface (11) and the second table surface (12); the diaphragm body is mounted on the first annular groove; a second annular groove is formed between the second table surface (12) and the third table surface (13); a third annular groove is formed between the third table surface (13) and the fourth table surface (14); the sealing gasket (3) is mounted on the third annular groove; and a flow guide channel (14) is symmetrically provided in the middle of the piston portion around the rod portion (15).

7. A two-way electromagnetic water valve according to claim 2, characterized in that: 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 via a latch and sealed with an O-ring, and circumferential laser welding is used.

8. A two-way electromagnetic water valve according to claim 7, characterized in that: The magnetic winding assembly comprises a frame (81), a coil (7), a moving iron core (6) and a stationary iron core (5) arranged in the upper valve body (100); the coil (7) is wound on the frame (81); the upper end of the connecting rod (1) passes through the stationary iron core (5) and is connected to the moving iron core (6); the moving iron core (6) and the stationary iron core (5) are matched with each other using a concave-convex structure, and the height ratio of the moving iron core (6) to the stationary iron core (5) is 2:

3.

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

10. A two-way electromagnetic water valve according to claim 8, characterized in that: A pressure ring (42) is provided inside the lower valve body (101), and the sealing portion (24) is embedded between the pressure ring (42) and the lower end surface of the static iron core (5).

11. A two-way electromagnetic water valve according to claim 8, characterized in that: A magnetic conductive sleeve (82) is provided between the coil (7) and the upper valve body (100), a magnetic conductive plate (83) is provided at the lower end of the coil (7), and magnetic conductive holes are evenly distributed on the magnetic conductive sleeve (82) and the magnetic conductive plate (83).

12. A two-way electromagnetic water valve according to claim 11, characterized in that: A magnetic isolation sleeve (8) is provided between the frame (81) and the static iron core (5) and the moving iron core (6); the static iron core (5) and the moving iron core (6) are located in the magnetic isolation sleeve (8); the magnetic isolation sleeve (8) and the static iron core (5) are welded after interference fitting, and an O-ring is provided at the connection for sealing.

13. A two-way electromagnetic water valve according to claim 12, characterized in that: The coil (7) is connected to the pin by using a resistance welding process.

14. A two-way electromagnetic water valve according to claim 12, characterized in that: The coil (7), the frame (81), the magnetic conductive sleeve (82) and the magnetic conductive plate (83) are integrally injection-molded with the valve body.

15. A two-way electromagnetic water valve according to claim 7, characterized in that: The lower end of the connecting rod (1) is connected to a spring (4), and the spring (4) is located in the lower valve body (101). The lower end of the spring (4) abuts against the lower valve body (101), and the upper end of the spring (4) abuts against the connecting rod (1).

16. A two-way electromagnetic water valve according to claim 15, characterized in that: The spring (4) is a special-shaped coil spring, wherein the coil diameter at the lower end of the special-shaped coil spring is greater than the coil diameter at the upper end.

17. A two-way electromagnetic water valve according to claim 6, characterized in that: The sealing pad (3) and the connecting rod (1) are connected by a double-sided vulcanization process.

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