Pressure balancing diaphragm of electromagnetic water valve

Abstract

The utility model discloses an electromagnetic water valve pressure balance diaphragm which comprises a diaphragm body made of flexible materials, the whole diaphragm body is of a disc-shaped structure, the diaphragm body is provided with a center installation hole, and the diaphragm body sequentially comprises a first connecting part, a deformation part and a second connecting part from the center to the outside. The inner side of the first connecting part is connected with the side wall of the central mounting hole, the outer side of the first connecting part is connected with the inner side of the deformation part, and the outer side of the deformation part is connected with the inner side of the second connecting part. In the moving process of the connecting rod structure, pressure balance is achieved through structural deformation of the deformation part, transmission of linear loads is completed, and load attenuation in the moving process is completed; after the limiting positions are pressed and balanced, the connecting rod moves from one limiting position to the other limiting position, and in the process, slow descending of load transmission is achieved, that is, it is guaranteed that the stress direction of the connecting rod is consistent with the displacement direction all the time.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic water valve technology, specifically to a pressure balancing diaphragm for an electromagnetic water valve. Background Technology

[0002] The core of an electromagnetic water 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 mode switching of a three-way electromagnetic water valve and the opening and closing of a two-way electromagnetic water valve are essentially changes in the relationship between electromagnetic force and the resultant force of the other two loads, causing the valve core of the electromagnetic water valve to move.

[0003] With limited space and power constraints, the potential for increasing electromagnetic force is not significant; the spring force must satisfy the reset requirement of another switching mode; water pressure generates resistance to the movement of the connecting rod valve core structure, and this resistance changes with water pressure. The higher the water pressure, the greater the resistance, and the greater the electromagnetic force required. However, water pressure is one of the core performance indicators of electromagnetic water valves. Therefore, how to balance the resistance generated by water pressure on the movement of the connecting rod valve core structure under a given electromagnetic force has become an urgent technical problem to be solved, and there is currently no relevant research. Utility Model Content

[0004] To address the existing technical problems, this utility model provides a pressure balancing diaphragm for an electromagnetic water valve, thereby solving the problems in the prior art.

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

[0006] An electromagnetic water valve pressure balancing diaphragm includes a diaphragm body made of flexible material. The diaphragm body has an overall disc-shaped structure and a central mounting hole. The diaphragm body includes a first connecting portion, a deformation portion, and a second connecting portion in sequence from its center outward. The inner side of the first connecting portion is connected to the sidewall of the central mounting hole, the outer side of the first connecting portion is connected to the inner side of the deformation portion, and the outer side of the deformation portion is connected to the inner side of the second connecting portion.

[0007] Preferably, the deformable portion is inclined from its inner side to its outer side in the axial direction of the diaphragm body.

[0008] This configuration allows the load to be transferred through the deformation of the deformation section, thereby transferring the load to the connecting rod head of the connecting rod structure and ensuring that the force direction of the connecting rod is always consistent with the displacement direction.

[0009] Preferably, the maximum tilt height H of the deformed portion is greater than the thickness L of the diaphragm body.

[0010] Preferably, the deformable part and the second connecting part are connected by an arc-shaped structure, which fits into the end of the connecting rod head of the connecting rod structure.

[0011] This configuration, with the arc-shaped structure fitting against the end of the connecting rod head, achieves surface-to-surface contact, thereby better transferring the load.

[0012] Preferably, the arc-shaped structure includes a first arc surface structure and a second arc surface structure, which are connected at their common external tangent, and the first arc surface structure and the second arc surface structure have the same radius but opposite bending directions.

[0013] Preferably, at least a portion of the first connecting portion facing the connecting rod head of the connecting rod structure has an abutting plane that abuts against the end face of the connecting rod head of the connecting rod structure.

[0014] With this configuration, the valve core structure first contacts the abutting plane of the first connecting part during its movement, and then contacts the deformation part. The load is transmitted through the deformation of the deformation part, and the load can be linearly transmitted to the connecting rod head of the connecting rod structure.

[0015] Preferably, the sidewall of the central mounting hole extends axially toward one side of the diaphragm body to form a boss, the extension direction of which is the same as the inclination direction of the deformable part, and the height of the boss is greater than the maximum inclination height H of the deformable part.

[0016] This design, through the rational design of the boss, improves the overall strength of the diaphragm body during load transfer.

[0017] Preferably, the thickness of the boss is greater than the maximum tilt height H of the deformed part.

[0018] This design ensures the strength of the diaphragm body when the linkage structure moves to its limit position.

[0019] Preferably, it further includes a sealing portion, and the outer side of the second connecting portion is connected to the sealing portion.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: During the movement of the connecting rod structure, the present utility model achieves pressure balance through the structural deformation of the deformation part, completes the linearized load transmission, and achieves 30% load attenuation during the movement process; after the pressure balance is achieved at the limit position, the connecting rod moves from one limit position to another, and the load transmission during this process is slowly reduced and always greater than the increase brought about by the change of electromagnetic force with displacement, that is, it ensures that the force direction of the connecting rod is always consistent with the displacement direction. Attached Figure Description

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

[0022] Figure 2 for Figure 1 A sectional view.

[0023] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0024] Figure 4 This is a schematic diagram of the diaphragm assembly state when it is not under stress.

[0025] Figure 5 for Figure 4 A status diagram in power-on mode;

[0026] Figure 6 for Figure 4 A schematic diagram of the state in power-off mode.

[0027] Figure 7 This is a linear variation diagram of load transfer during the movement of the connecting rod in finite element simulation mode. Detailed Implementation

[0028] 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 above-mentioned subject matter 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.

[0029] 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.

[0030] As attached Figure 1 - Appendix Figure 6 The electromagnetic water valve pressure balancing diaphragm shown includes a diaphragm body made of flexible material, integrally molded, and generally in the shape of a disc. The diaphragm body has a central mounting hole 1, through which it is mounted on a connecting rod structure. The sidewall of the central mounting hole 1 extends axially towards one side of the diaphragm body to form a boss. The extension direction of the boss is the same as the inclination direction of the deformation part 3, and the height of the boss is greater than the maximum inclination height H of the deformation part 3.

[0031] from Figure 2 and Figure 3As can be seen, the diaphragm body, from its center outwards, includes a first connecting part 2, a deformation part 3, a second connecting part 5, and a sealing part 6. The inner side of the first connecting part 2 is connected to the lower end of the side wall of the central mounting hole 1, the outer side of the first connecting part 2 is connected to the inner side of the deformation part 3, the outer side of the deformation part 3 is connected to the inner side of the second connecting part 5, and the outer side of the second connecting part 5 is connected to the sealing part 6. The sealing part 6 connects to the external connection structure, thus achieving both sealing of the valve core and fixing of the outer side of the diaphragm body. The sealing part 6 has a symmetrical structure, and its thickness is greater than the thickness of the diaphragm body.

[0032] The deformation section 3 is inclined from its inner side to its outer side in the axial direction of the diaphragm body, so that the inner position of the deformation section 3 is lower than the outer position of the deformation section 3, and the maximum inclination height H of the deformation section 3 is greater than the thickness L of the diaphragm body, and the thickness of the boss is greater than the maximum inclination height H of the deformation section 3. The deformation section 3 and the second connecting section 4 are connected by an arc-shaped structure, which includes a first arc surface structure 4 and a second arc surface structure 8. The first arc surface structure 4 and the second arc surface structure 8 are connected at their common external tangent, that is, the connection point of the first arc surface structure 4 and the second arc surface structure 8 is located at the tangent of the first arc surface structure 4 and the second arc surface structure 8. The first arc surface structure 4 and the second arc surface structure 8 have the same radius and opposite bending directions. The first arc surface structure 4 is in contact with the end of the connecting rod head of the connecting rod structure. In this way, when the connecting rod moves to the limit position, the end of the connecting rod head of the connecting rod structure is in contact with the first arc surface structure 4 on the deformation section 3, realizing surface-to-surface contact, which can better linearly transmit the load. The side of the deformable part 3 facing the connecting rod head of the connecting rod structure matches the end face of the corresponding position of the connecting rod head. In this way, the side of the deformable part 3 facing the connecting rod head of the connecting rod structure fits into the end face of the corresponding position of the connecting rod head, achieving surface-to-surface contact to better transmit loads.

[0033] At least a portion of the first connecting part 2 facing the connecting rod head of the connecting rod structure has an abutting plane 21 that abuts against the end face of the connecting rod head of the connecting rod structure. With the axis of the central mounting hole 1 in the attached drawings of this embodiment as the vertical direction, the abutting plane 21 is arranged horizontally in this embodiment. Of course, the abutting plane 21 is mainly for mating with the end face of the connecting rod head of the connecting rod structure. Therefore, when the end face of the connecting rod head of the connecting rod structure at the position where it mates with the abutting plane 21 is a slope, the abutting plane 21 is also correspondingly set as a slope. The end face of the first connecting part 2 on the side away from the connecting rod head of the connecting rod structure can be either a plane or a slope. The connection between the first connecting part 2 and the side wall of the central mounting hole 1 is also connected by an arc transition.

[0034] Figures 4-6The diagram illustrates the application of a balancing diaphragm in a three-way solenoid water valve and its installation position. Specifically, during installation, a balancing diaphragm is installed at the upper and lower positions of the connecting rod head of each connecting rod structure. The two balancing diaphragms are symmetrically arranged. The outer ring of the balancing diaphragm is then fixed by a pressure ring, i.e., the sealing part 6 is fixedly connected to the pressure ring to fix the outer ring of the balancing diaphragm. The central mounting hole of the balancing diaphragm is installed through the connecting rod structure to fix the inner ring of the balancing diaphragm. Figure 4 This is a schematic diagram of the assembly state of the diaphragm when it is not under stress, with the connecting rod head located in the middle of the two diaphragms. When energized, electromagnetic force dominates, exceeding the spring force and water pressure resistance. The connecting rod moves downward, and the abutting plane 21 of the first connecting part on the diaphragm first contacts the end face of the connecting rod head. As the connecting rod continues to move downward, the contact area between the connecting rod head and the diaphragm slightly increases. At this time, the deformation part 3 and its arc-shaped structure connected to the second connecting part begin to deform. The connecting rod continues to move downward until the end face of the connecting rod head is in contact with the surface opposite the deformation part of the diaphragm (see Figure 5). At this time, the load is linearized and transmitted to the connecting rod, achieving force balance of the connecting rod in the direction of the connecting rod's movement. When switching from energized to de-energized state, the position of the connecting rod remains unchanged in the instant before the switch, i.e., it still maintains a pressure balance state. The connecting rod is only subjected to spring force. As the position of the connecting rod changes, the spring force decreases, and the load transmitted from the diaphragm to the connecting rod weakens (see Figure 5). Figure 7 At this point, absolute pressure balance cannot be achieved, but the spring force is still greater than the water pressure resistance. At the same time, as the connecting rod moves further, the water pressure will decrease, weakening the effect of reduced force transmission at the diaphragm end. During this process, the resultant force on the connecting rod is consistent with the direction of movement, realizing the mode switching. When the power is off, the spring force dominates, and the water pressure exerts pressure on the lower sealing gasket. The high stiffness of the sealing gasket will transfer all the load to the connecting rod. The connecting rod moves upward, and the abutting plane 21 of the first connecting part on the diaphragm first contacts the end face of the connecting rod head. As the connecting rod continues to move upward, the contact area between the connecting rod head and the diaphragm increases. At this time, the deformation part 3 begins to deform until the end face of the connecting rod head is in contact with the opposite surface of the deformation part of the diaphragm (see Figure 6). At this time, the load is linearly transferred to the connecting rod, realizing pressure balance.

[0035] Through finite element simulation experiments, the linear change of the diaphragm load can be compared with that of the reference diaphragm. Figure 7 .

[0036] This embodiment achieves mode switching of the electromagnetic water valve at 0.5 MPa under 8V voltage; the maximum stroke of the connecting rod reciprocating up and down is up to 5 mm; the symmetrically installed double diaphragms have a maximum resistance of no more than 0.1 N when reciprocating 4 mm under no-load conditions; the load pressure and transmitted pressure are highly linearized at the upper and lower limit positions; when subjected to 0.2 MPa pressure at the limit position, the connecting rod moves 2 mm, and the transmitted load loss does not exceed 30%; the life of the no-load reciprocating motion is 8 million cycles, and the life of the reciprocating motion under 0.2 MPa pressure is 3.6 million cycles; the diaphragm has low cost; and it is simple to install and easy to operate.

[0037] 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 pressure-balancing diaphragm for an electromagnetic water valve, characterized in that: The diaphragm body is made of a flexible material and has a disc-shaped structure. The diaphragm body has a central mounting hole (1) and includes a first connecting part (2), a deformation part (3) and a second connecting part (5) from the center outward. The inner side of the first connecting part (2) is connected to the side wall of the central mounting hole (1), the outer side of the first connecting part (2) is connected to the inner side of the deformation part (3), and the outer side of the deformation part (3) is connected to the inner side of the second connecting part (5).

2. The electromagnetic water valve pressure balancing diaphragm according to claim 1, characterized in that: The deformable part (3) is inclined from its inner side to its outer side in the axial direction of the diaphragm body.

3. The electromagnetic water valve pressure balancing diaphragm according to claim 2, characterized in that: The maximum tilt height H of the deformable part (3) is greater than the thickness L of the diaphragm body.

4. The electromagnetic water valve pressure balancing diaphragm according to claim 1, characterized in that: The deformable part (3) and the second connecting part (5) are connected by an arc-shaped structure, which fits into the end of the connecting rod head of the connecting rod structure.

5. The electromagnetic water valve pressure balancing diaphragm according to claim 4, characterized in that: The arc-shaped structure includes a first arc surface structure (4) and a second arc surface structure (8). The first arc surface structure (4) and the second arc surface structure (8) are connected at their common external tangent. The first arc surface structure (4) and the second arc surface structure (8) have the same radius and opposite bending directions.

6. The electromagnetic water valve pressure balancing diaphragm according to claim 2, characterized in that: The first connecting part (2) has at least a portion of its side facing the connecting rod head of the connecting rod structure having a top surface (21) that abuts against the end face of the connecting rod head of the connecting rod structure.

7. The electromagnetic water valve pressure balancing diaphragm according to claim 3, characterized in that: The sidewall of the central mounting hole (1) extends axially toward one side of the diaphragm body to form a boss. The extension direction of the boss is the same as the tilt direction of the deformable part (3), and the height of the boss is greater than the maximum tilt height H of the deformable part (3).

8. The electromagnetic water valve pressure balancing diaphragm according to claim 7, characterized in that: The thickness of the boss is greater than the maximum tilt height H of the deformable part (3).

9. The electromagnetic water valve pressure balancing diaphragm according to claim 1, characterized in that: It also includes a sealing part (6), the outer side of the second connecting part (5) being connected to the sealing part (6).

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