Diaphragm and electromagnetic valve

Abstract

The diaphragm comprises a large-diameter part, a deformation part and a small-diameter part which are connected, the deformation part is located between the large-diameter part and the small-diameter part, the deformation part is constructed to be capable of deforming, a sealing face part is arranged on the side, relatively away from the deformation part, of the small-diameter part, and the diaphragm further comprises a convex rib part. And at least part of the convex rib part protrudes and extends from the outer surface of the joint of the deformation part and the small-diameter part. According to the utility model, the diaphragm structure is optimally designed, and at least the convex rib part is additionally arranged at the joint of the deformation part and the small-diameter part, so that the strength of the diaphragm is improved, the possibility of deformation of other structures of the diaphragm in the repeated actuation process is relatively reduced, and the sealing reliability of the electromagnetic valve structure is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a diaphragm and a solenoid valve. Background Art

[0002] Diaphragms are often used in solenoid valve structures. When the valve is closed, the diaphragm fits against the sealing port of the valve body. When the valve is opened, the diaphragm moves upward and away from the sealing port under water pressure. The diaphragm is prone to structural deformation during the repeated operation of opening and closing the valve, which affects the sealing reliability. Utility Model Content

[0003] The utility model aims to provide a diaphragm and a solenoid valve, which can improve the strength of the diaphragm, relatively reduce the possibility of other structural deformations of the diaphragm during repeated actuation, and ensure the sealing reliability.

[0004] In order to solve the above technical problems, the utility model provides a diaphragm, including a large diameter portion, a deformation portion and a small diameter portion connected to each other, the deformation portion is located between the large diameter portion and the small diameter portion, the deformation portion is constructed to be able to deform, and a sealing surface portion is provided on the side of the small diameter portion relatively away from the deformation portion, and also includes a convex rib portion, at least part of the convex rib portion protrudes from the outer surface of the connection between the deformation portion and the small diameter portion.

[0005] By optimizing the design of the diaphragm structure, a convex rib is added at least at the connection between the deformation portion and the small diameter portion, so that the strength of the diaphragm is improved, and the possibility of other structural deformations of the diaphragm during repeated actuation is relatively reduced, thereby ensuring the sealing reliability of the solenoid valve structure.

[0006] The utility model also provides a solenoid valve, comprising a valve seat, a press-fitting portion, a diaphragm and a sealing core.

[0007] The diaphragm includes a large diameter portion, a small diameter portion and a deformation portion located between the large diameter portion and the small diameter portion, the deformation portion can be deformed, the valve seat and the press-fitting portion axially limit the large diameter portion, the valve seat is provided with a sealing port, the small diameter portion is connected to the sealing core, the small diameter portion is provided with a sealing surface portion, the sealing surface portion can abut against or move away from the sealing port, the diaphragm also includes a convex rib portion, at least part of the convex rib portion protrudes from the outer surface of the connection between the deformation portion and the small diameter portion.

[0008] By optimizing the design of the diaphragm in the solenoid valve structure, a convex rib portion is added at least at the connection between the deformation portion and the small diameter portion of the diaphragm, so that the strength of the diaphragm is improved, and the possibility of other structural deformations of the diaphragm during repeated actuation is relatively reduced, thereby ensuring the sealing reliability of the solenoid valve structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1A schematic structural diagram of a specific embodiment of the solenoid valve provided by the utility model;

[0010] Figure 2 for Figure 1 A schematic diagram of the structure of a first embodiment of a diaphragm in a solenoid valve;

[0011] Figure 3 for Figure 2 Cross-sectional view of the diaphragm along the GG direction;

[0012] Figure 4 for Figure 1 A schematic diagram of the structure of a second embodiment of a diaphragm in a solenoid valve;

[0013] Figure 5 for Figure 1 A schematic diagram of the structure of a third embodiment of a diaphragm in a solenoid valve;

[0014] in, Figure 1-Figure 5 The reference numerals in the figures are described as follows:

[0015] 1-diaphragm; 11-large diameter portion; 12-deformation portion; 13-small diameter portion; 13a-balance hole; A-sealing surface; 14-convex rib portion;

[0016] 2-valve seat; 2a-chamber; 2a1-upper chamber; 2a2-lower chamber; 2b-water outlet channel;

[0017] 3-seal core; 3a-pilot hole;

[0018] 4-Sealing valve head;

[0019] 5- Pressing department;

[0020] 61-core iron; 62-spring; 63-electromagnetic coil;

[0021] 7-Guide sleeve. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] The “plurality” mentioned herein generally means more than two; and when “plurality” is used to indicate the number of certain components, it does not indicate the relationship between the quantities of these components.

[0024] Please refer to Figure 1-Figure 3 , Figure 1 A schematic structural diagram of a specific embodiment of the solenoid valve provided by the utility model; Figure 2 for Figure 1 A schematic diagram of the structure of a first embodiment of a diaphragm in a solenoid valve; Figure 3for Figure 2 Cross-sectional view of the diaphragm along the GG direction.

[0025] The utility model provides a diaphragm 1, comprising a large diameter portion 11, a deformation portion 12 and a small diameter portion 13 connected to each other, wherein the deformation portion 12 is located between the large diameter portion 11 and the small diameter portion 13, the deformation portion 12 is constructed to be deformable, a sealing surface portion A is provided on a side of the small diameter portion 13 relatively away from the deformation portion 12, and further comprising a rib portion 14, at least part of the rib portion 14 protruding from the outer surface of the connection between the deformation portion 12 and the small diameter portion 13.

[0026] The utility model optimizes the design of the diaphragm structure by adding a rib portion 14 at least at the connection between the deformation portion 12 and the small diameter portion 13, so that the strength of the diaphragm 1 is improved, and the possibility of other structural deformations of the deformation portion 12 other than axial expansion and contraction during repeated actuation is relatively reduced, so that the sealing surface A is always kept parallel to the sealing port of the solenoid valve structure, thereby ensuring the sealing reliability of the solenoid valve structure.

[0027] In this embodiment, at least part of the ribs 14 are arranged along the circumference of the connection between the deformation portion 12 and the small diameter portion 13 and form a circle.

[0028] In this way, the structural strength of the connection between the deformation portion 12 and the small diameter portion 13 is evenly strengthened along the circumferential direction, ensuring that the sealing surface A is subjected to balanced force and the sealing reliability of the solenoid valve structure is ensured.

[0029] Of course, in practice, the convex rib portion 14 is not limited to the above-mentioned embodiment. For example, the convex rib portion 14 may include a plurality of split portions, and the plurality of split portions are evenly distributed along the circumference of the small diameter portion 13 .

[0030] Please refer to Figure 4 and Figure 5 , Figure 4 for Figure 1 The schematic diagram of the structure of the second embodiment of the diaphragm in the solenoid valve, Figure 5 for Figure 1 A schematic structural diagram of a third embodiment of a diaphragm in a solenoid valve.

[0031] In some embodiments of the present application, part of the rib portion 14 protrudes from the outer surface of the small diameter portion 13 .

[0032] As described above, the rib portion 14 is not only arranged at the connection between the deformation portion 12 and the small diameter portion 13, but also covers at least a part of the small diameter portion 13 in the axial direction. It can be understood that the longer the axial length of the rib portion 14 is, the more it can enhance the strength of the diaphragm 1, and the closer the rib portion 14 is to the sealing surface A in the axial direction, the more it can ensure that the sealing surface A is subjected to balanced force, thereby further improving the sealing reliability of the solenoid valve structure. Figure 5It can be seen that, in the limit state, the end of the rib portion 14 close to the sealing surface A can be flush with the sealing surface A.

[0033] The distance between the end of the rib portion 14 close to the sealing surface A in the axial direction and the sealing surface A is defined as H, and the value range of H is: 0≤H≤1.5mm.

[0034] It has been verified that when H is within the above value range, the consistency of the sealing surface A during deformation can be ensured, thereby improving the sealing reliability of the diaphragm 1.

[0035] Depend on Figure 3-Figure 5 It can be seen that, in this embodiment, the profile cross section of the rib portion 14 is in the shape of an arc.

[0036] Of course, in practice, the shape of the convex rib portion 14 is not limited. For example, the cross-section of the convex rib portion 14 may also be a triangle, a quadrilateral, etc.

[0037] The utility model also provides a solenoid valve, comprising a valve seat 2, a press-fitting portion 5, a diaphragm 1 and a sealing core 3.

[0038] The diaphragm 1 includes a large diameter portion 11, a small diameter portion 13 and a deformation portion 12 located between the large diameter portion 11 and the small diameter portion 13. The deformation portion 12 can be deformed. The valve seat 2 and the press-fitting portion 5 axially limit the large diameter portion 11. The valve seat 2 is provided with a sealing port. The small diameter portion 13 is connected to the sealing core 3. The small diameter portion 13 is provided with a sealing surface A. The sealing surface A can abut against or stay away from the sealing port. The diaphragm 1 also includes a convex rib portion 14. At least part of the convex rib portion 14 protrudes from the outer surface of the connection between the deformation portion 12 and the small diameter portion 13.

[0039] The present application optimizes the design of the diaphragm 1 in the solenoid valve structure, and adds a rib portion 14 at least at the connection between the deformation portion 12 and the small diameter portion 13. The strength of the diaphragm 1 is improved, and the possibility of the deformation portion 12 undergoing other structural deformations other than axial expansion and contraction during repeated actuation is relatively reduced, thereby ensuring that the sealing surface A always remains parallel to the sealing port of the solenoid valve structure, thereby ensuring the sealing reliability of the solenoid valve structure.

[0040] Among them, Figure 1 As shown, the valve seat 2 is provided with a chamber 2a, a water inlet channel and a water outlet channel 2b, the water inlet channel and the water outlet channel 2b are both connected to the chamber 2a, and a sealing port is formed at the connection between the water outlet channel 2b and the chamber 2a;

[0041] The sealing core 3 passes through the inside of the sealing port, and the sealing core 3 has an axially penetrating pilot hole 3a. The solenoid valve also includes a sealing valve head 4 and an electromagnetic drive mechanism. The sealing valve head 4 is connected to the axial end of the electromagnetic drive mechanism close to the sealing core 3. The sealing valve head 4 can open or seal the pilot hole 3a under the drive of the electromagnetic drive mechanism.

[0042] It can be seen that, with the diaphragm 1 as the boundary, the interior of the chamber 2a is divided into an upper chamber 2a1 located on the upper side of the diaphragm 1, and a lower chamber 2a2 located on the lower side of the diaphragm 1, and the lower chamber 2a2 is connected to the water inlet channel 2b. The working principle of the solenoid valve of the utility model is as follows:

[0043] When the electromagnetic drive mechanism is energized, the electromagnetic drive mechanism drives the sealing valve head 4 to open the pilot hole 3a of the sealing core 3, and the upper chamber 2a1 is connected with the water outlet channel 2b through the pilot hole 3a. The pressure of the upper chamber 2a1 drops rapidly. Since the lower chamber 2a2 is connected with the water inlet channel 2b, a pressure difference is formed around the diaphragm 1, and the water flow pressure pushes the deformation part 12 of the diaphragm 1 to deform and shrink upward in the axial direction, and drives the sealing core 3 to move upward. The sealing surface A of the diaphragm 1 opens the sealing port, and the water flows to the outlet through the gap between the sealing core 3 and the sealing port;

[0044] When the electromagnetic drive mechanism is powered off, the sealing valve head 4 is pushed by the restoring force of the spring force in the electromagnetic drive mechanism to reseal the pilot hole 3a and push the sealing core 3 downward, and the deformed portion 12 of the diaphragm 1 is deformed and expanded downward in the axial direction, so that the sealing surface A of the diaphragm 1 is re-fitted and sealed with the sealing port to prevent water from passing through.

[0045] In this embodiment, the electromagnetic drive mechanism specifically includes a core iron 61, a spring 62 and an electromagnetic coil 63. The middle part of the press-fitting portion 5 is connected to a guide sleeve 7 which is open at the lower end and extends upward. The core iron 61 is movably inserted into the guide sleeve 7. The sealing valve head 4 is connected to the axial end of the core iron 61 close to the sealing core 3. The electromagnetic coil 63 is sleeved on the outer periphery of the guide sleeve 7. The spring 62 is pressed between the closed end wall of the guide sleeve 7 and the corresponding end wall of the core iron 61.

[0046] In this way, the guide sleeve 7 plays a guiding and limiting role for the core iron 61. When the electromagnetic coil 63 is energized, the core iron 61 moves upward under the action of the electromagnetic force, and drives the sealing valve head 4 to open the pilot hole 3a of the sealing core 3, and the spring 62 is gradually compressed to store energy; when the electromagnetic coil 63 is de-energized, the core iron 61 moves downward under the action of the restoring force of the spring 62, and the core iron 61 pushes the sealing valve head 4 to reseal the pilot hole 3a, and pushes the sealing core 3 to move downward until the sealing surface A of the diaphragm 1 is re-sealed with the sealing port.

[0047] In this embodiment, the inner end of the guide sleeve 7 is connected to the press-fitting portion 5 as a whole. In practice, it is also feasible that the guide sleeve 7 and the press-fitting portion 5 are separate structures, such as the lower end of the guide sleeve 7 is directly connected to the valve seat 2. In this case, the valve seat 2 needs to be provided with a corresponding connection structure for connecting the guide sleeve 7. It can be seen that the setting method of this embodiment can simplify the structure of the valve seat 2 and reduce the difficulty of processing the valve seat 2, which is a more preferred technical solution.

[0048] Please continue to refer to Figure 2-Figure 5 In the diaphragm 1 of this embodiment, the small diameter portion 13 is provided with one or more balancing holes 13 a , and the plurality of balancing holes 13 a are distributed at intervals along the circumferential direction, and the balancing holes 13 a penetrate through both axial end surfaces of the small diameter portion 13 .

[0049] Through the setting of the above-mentioned balancing hole 13a, when the electromagnetic drive mechanism is powered off, the sealing valve head 4 is pushed to re-pilot the hole 3a under the action of the restoring force of the spring force in the electromagnetic drive mechanism, and the sealing core 3 is pushed to move downward. At the same time, the water flow can enter the upper chamber 2a1 through the surrounding balancing holes 13a, so that the pressure on the upper and lower sides of the diaphragm 1 is balanced. The electromagnetic drive mechanism does not need to overcome the water flow pressure when pushing the diaphragm 1 and the sealing core 3 to move downward, which can reduce the spring force of the spring and reduce the manufacturing cost.

[0050] like Figure 1 and Figure 3 As shown, in this embodiment, the large diameter portion 11 protrudes radially outward compared to the deformation portion 12 of the diaphragm 1, the inner wall of the chamber 2a has a step wall, the press-fitting portion 5 is at least partially installed inside the chamber 2a, and a clamping wall is provided on the end face of the press-fitting portion 5 facing the step wall, and the large diameter portion 11 is installed between the step wall and the clamping wall.

[0051] In this way, the large diameter portion 11 of the diaphragm 1 is pressed against the step wall of the inner wall of the chamber 2a through the press-fitting portion 5, so that during the operation of the solenoid valve, the large diameter portion 11 is always in a fixed state, and the axial movement of the small diameter portion 13 is achieved only through the axial deformation of the deformation portion 12 to open or close the sealing port.

[0052] like Figure 1 and Figure 3 As shown, in this embodiment, the small diameter portion 13 protrudes radially inward compared to the deformation portion 12 of the diaphragm 1, the peripheral wall of the sealing core 3 is provided with a limiting groove, and the radial inner end of the small diameter portion 13 is inserted into the limiting groove to realize the limiting connection between the sealing core 3 and the small diameter portion 13.

[0053] In practice, the sealing core 3 and the small diameter portion 13 can be fixed by interference fit to ensure reliable connection. At the same time, the diaphragm 1 can be made of flexible materials such as rubber to ensure that the small diameter portion 13 of the diaphragm 1 and the sealing core 3 are sealed along the circumferential direction, and the large diameter portion 11 of the diaphragm 1 and the inner wall of the chamber 2a are sealed along the circumferential direction to prevent water leakage and the like.

[0054] Please continue to refer to Figure 1In this embodiment, the core iron 61 has a connecting hole at one axial end close to the sealing core 3, and the width of the connecting hole gradually decreases in the direction close to the opening end. It can be seen that in the axial cross-section, the connecting hole is an inverted trapezoidal structure; the sealing valve head 4 is hourglass-shaped, and one end of the sealing valve head 4 is inserted into the connecting hole to ensure reliable connection; the outer end wall of the sealing valve head 4 forms a sealing end face for sealing the pilot hole 3a, and the area of ​​the sealing end face needs to be larger than the cross-sectional area of ​​the pilot hole 3a to ensure reliable sealing.

[0055] The electromagnetic valve of the utility model is suitable for automatic control devices of washing machines, dishwashers or other similar purposes, and is used for opening and closing water channels.

[0056] The above is a detailed introduction to a diaphragm and a solenoid valve provided by the utility model. This article uses specific examples to illustrate the principle and implementation of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A diaphragm, characterized in that: The invention comprises a large diameter portion (11), a deformation portion (12) and a small diameter portion (13) which are connected to each other, wherein the deformation portion (12) is located between the large diameter portion (11) and the small diameter portion (13), the deformation portion (12) is configured to be deformable, a sealing surface portion (A) is provided on a side of the small diameter portion (13) which is relatively far from the deformation portion (12), and a convex rib portion (14), wherein at least a part of the convex rib portion (14) is protruded from the outer surface of the connection between the deformation portion (12) and the small diameter portion (13).

2. The diaphragm according to claim 1, characterized in that At least part of the convex rib portion (14) is arranged along the circumference of the connection between the deformation portion (12) and the small diameter portion (13) and forms a circle.

3. The diaphragm according to claim 1, characterized in that Part of the convex rib portion (14) is protruding from the outer surface of the small diameter portion (13).

4. The diaphragm according to claim 1, characterized in that The distance between the end of the rib portion (14) close to the sealing surface portion (A) in the axial direction and the sealing surface portion (A) is H, and the value range of H is: 0≤H≤1.5mm.

5. The diaphragm according to any one of claims 1 to 4, characterized in that: The small diameter portion (13) is provided with one or more balancing holes (13a), and the plurality of balancing holes (13a) are distributed at intervals along the circumferential direction, and the balancing holes (13a) penetrate through both axial end surfaces of the small diameter portion (13).

6. A solenoid valve, characterized in that: It comprises a valve seat (2), a press-fitting portion (5), a diaphragm (1) and a sealing core (3). The diaphragm (1) comprises a large diameter portion (11), a small diameter portion (13) and a deformation portion (12) located between the large diameter portion (11) and the small diameter portion (13); the deformation portion (12) is capable of deformation; the valve seat (2) and the press-fit portion (5) axially limit the large diameter portion (11); the valve seat (2) is provided with a sealing port; the small diameter portion (13) is connected to the sealing core (3); the small diameter portion (13) is provided with a sealing surface portion (A); the sealing surface portion (A) is capable of abutting against or moving away from the sealing port; the diaphragm (1) further comprises a convex rib portion (14); at least a portion of the convex rib portion (14) is protruding from the outer surface of the connection between the deformation portion (12) and the small diameter portion (13).

7. The solenoid valve according to claim 6, characterized in that: The sealing core (3) has an axially penetrating pilot hole (3a), and the solenoid valve further comprises a sealing valve head (4) and an electromagnetic drive mechanism, wherein the sealing valve head (4) is connected to an axial end of the electromagnetic drive mechanism close to the sealing core (3), and the sealing valve head (4) can open or seal the pilot hole (3a) under the drive of the electromagnetic drive mechanism.

8. The solenoid valve according to claim 7, characterized in that: The electromagnetic drive mechanism comprises a core iron (61), the sealing valve head (4) is connected to an axial end of the core iron (61) close to the sealing core (3), the electromagnetic valve also comprises a guide sleeve (7), the guide sleeve (7) is limitedly connected to the valve seat (2), the inner end of the guide sleeve (7) is an open end and extends in a direction away from the sealing core (3), the core iron (61) is inserted into the guide sleeve (7) and can slide in the axial direction.

9. The solenoid valve according to claim 6, characterized in that: The large diameter portion (11) protrudes outward in the radial direction compared to the deformation portion (12) of the diaphragm (1); the inner wall of the valve seat (2) has a step wall; the press-fit portion (5) is at least partially installed inside the valve seat (2); a clamping wall is provided on the end surface of the press-fit portion (5) facing the step wall; and the large diameter portion (11) is installed between the step wall and the clamping wall.

10. The solenoid valve according to claim 6, characterized in that: The small diameter portion (13) protrudes radially inwards compared to the deformation portion (12) of the diaphragm (1), and a limiting groove is provided on the peripheral wall of the sealing core (3), and the radial inner end of the small diameter portion (13) is inserted into the limiting groove.

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