Electromagnetic valve with improved valve body structure

Abstract

An electromagnetic valve with an improved valve body structure comprises a valve shell, a valve body and an opening and closing piece comprising a diaphragm, a mounting cavity is formed in the radial direction of the valve body, a working cavity is further formed in the inner side of the mounting cavity, a connecting area of the mounting cavity and the working cavity is provided with a connecting end face for abutting against the axial end face of the diaphragm, and the connecting end face is axially provided with a first protruding rib in a protruding mode. The diaphragm comprises an inner ring part, an outer ring part and a connecting part for connecting the inner ring part and the outer ring part, the valve shell is axially provided with a mounting table, the inner wall of a mounting cavity radially protrudes to form an annular second convex rib, the end face, abutting against the diaphragm, of the mounting table of the valve shell is the axial mounting end face of the valve shell, and the axial distance between the connecting end face and the axial mounting end face of the valve shell is K1; the radial distance from the mounting table to the second convex rib is K2, the axial height of the outer ring part is L1, the area of the axial cross section of the circular ring of the outer ring part is S1, and (L1-K1) / L1 is larger than or equal to 0.23 and smaller than or equal to 0.27, and (K1 * K2-S1) / K1 * K2 is larger than or equal to 0.17 and smaller than or equal to 0.23. According to the electromagnetic valve with the design, the pressure resistance and the stability of parts are improved.

Description

Technical Field

[0001] This utility model relates to a solenoid valve, and more particularly to a solenoid valve with an improved valve body structure, which is classified as F16K7 / 12 (2006.01) by IPC. Background Technology

[0002] As modern urban water supply systems are gradually optimized and more and more households install home booster pumps, the water pressure of tap water has increased significantly compared to the past, making the water hammer effect more pronounced. This makes it particularly important to enhance the sealing performance (or water pressure resistance) of components such as solenoid valves used to control the opening and closing of tap water under high water pressure conditions.

[0003] Currently, the method to improve the sealing performance of solenoid valves is to adjust the compression of the diaphragm. If the diaphragm is designed to be too large (i.e., the compression is set too high), its molecular structure is easily compressed and damaged, resulting in permanent deformation and loss of sealing ability. If the diaphragm is designed to be too small (i.e., the compression is set too low), it is prone to leakage under high water pressure, and the overall pressure resistance of the solenoid valve is poor. Therefore, there is a need for improvement. Utility Model Content

[0004] To solve the above problems, this utility model provides the following technical solution:

[0005] An improved solenoid valve with an improved valve body structure includes a valve housing, a valve body, and an actuating element containing a diaphragm. The valve body has a radially provided mounting cavity for connecting and fixing the valve housing. A working cavity for accommodating the actuating element is also provided inside the mounting cavity. The connection area between the mounting cavity and the working cavity has a connecting end face for the axial end face of the diaphragm to abut against. The connecting end face has an axially protruding annular first rib. The diaphragm includes a circular inner ring, a circular outer ring, and a connecting portion connecting the two. The valve housing has an axially provided annular mounting... The valve housing mounting platform is characterized by: a radially protruding annular second rib on the inner wall of the mounting cavity; the end face of the valve housing mounting platform that abuts against the diaphragm is the axial mounting end face of the valve housing; the axial distance between the connecting end face and the axial mounting end face of the valve housing is K1; the radial distance from the mounting platform to the second rib is K2; the axial height of the outer ring is L1; and the area of ​​the axial cross section of the outer ring is S1. Then, the following conditions are met: 0.23≤(L1-K1) / L1≤0.27, 0.17≤(K1*K2-S1) / K1*K2≤0.23.

[0006] The improved valve body structure of this utility model, by setting a second rib in the mounting cavity of the valve body and optimizing the fit between the diaphragm and the valve shell and valve body, ensures that after the solenoid valve is installed, the diaphragm is squeezed and filled into the gap between the valve shell and valve body in both radial and axial directions without being crushed. This improves the pressure resistance of the solenoid valve while ensuring the stability of its parts.

[0007] Furthermore, the second rib includes an annular columnar water-blocking part connected to the connecting end face and a guide part that bevels the water-blocking part and the inner wall surface of the mounting cavity. The axial height of the guide part is H1, which satisfies H1 / L1≥0.25.

[0008] Furthermore, if the radial width of the outer ring is L2 and the radial distance from the inner wall of the working cavity to the mounting platform is R1, then R1 / L2 ≤ 0.3 is satisfied.

[0009] Furthermore, the valve housing also includes a radial mounting surface of the valve housing, one end of which is connected to the axial mounting end face of the valve housing. The distance from the radial mounting surface of the valve housing to the radial inner wall of the mounting cavity is R2, which satisfies R2 / L2≤0.3.

[0010] Furthermore, if the axial distance from the junction of the guide portion and the radial inner wall of the mounting cavity to the axial mounting end face of the valve body is R3, then R3 / L1≤0.3 is satisfied. Attached Figure Description

[0011] Figure 1 This is an axial sectional view of the solenoid valve with the improved valve body structure according to this utility model.

[0012] Figure 2 yes Figure 1 A magnified view of part A in the diagram;

[0013] Figure 3 This is an axial sectional view of the diaphragm of this utility model;

[0014] Figure 4 This is a three-dimensional structural diagram of the valve body;

[0015] Wherein: 11-Axial mounting end face of valve housing, 12-Radial mounting surface of valve housing, 21-Mounting cavity, 22-Working cavity, 23-Connecting end face, 100-Valve housing, 110-Mounting platform, 120-Valve housing main body, 130-Valve housing mounting part, 200-Valve body, 210-First rib, 220-Second rib, 221-Water baffle, 220-Guide part, 300-Diaphragm, 330-Inner ring, 320-Outer ring, 330-Connecting part, 400-Coil assembly, 500-Moving iron core, 600-Spring, 700-Valve plug Detailed Implementation

[0016] See Figures 1 to 4This utility model discloses an improved solenoid valve with an improved valve body structure, including a valve housing 100, a coil assembly 400 fixed on the valve housing 100, a movable iron core 500 and a spring 600 disposed in the hollow cavity of the valve housing 100, a valve body 200 disposed on one axial side of the valve housing 100, and an opening and closing member including a diaphragm 300 assembled between the valve housing 100 and the valve body 200 in the axial direction. The valve housing 100 of this utility model includes a cylindrical valve housing body 120 for mounting the movable iron core 500 and the spring 600, an annular valve housing mounting part 130 extending radially from one axial end of the valve housing body 120, and a mounting platform 110 protruding from the axial end face of the valve housing mounting part 130. The valve housing mounting part 130 includes a valve housing axial mounting end face 11 for the outer ring part 320 to axially abut against, and a valve housing radial mounting surface 12 connected at one end to the valve housing axial mounting end face 11 and radially opposite to the inner wall surface of the mounting cavity. The valve body 200 includes a mounting cavity 21 for mounting the valve housing 100, and a working cavity 22 located inside the mounting cavity 21 for accommodating the opening and closing element. The connection area between the mounting cavity 21 and the working cavity 22 has a connecting end face 23 for the axial end face of the diaphragm 300 to abut against. The connecting end face 23 of the valve body 200 has an axially protruding annular first rib 210, and the radial inner wall of the mounting cavity 21 has an annular second rib 220 that connects with the connecting end face 23. The diaphragm 300 includes an annular inner ring portion 310, an arc-shaped outer ring portion 320, and a connecting portion 330 connecting the inner ring portion 310 and the outer ring portion 320. The axial height of the outer ring portion 320 is L1, its radial width is L2, and the axial cross-sectional area of ​​the annulus of the outer ring portion 320 is S1. After the solenoid valve is assembled, the axial distance between the connecting end face 23 of the valve body 200 and the axial mounting end face 11 of the valve shell 100 is K1, and the radial distance between the mounting platform 110 of the valve shell 100 and the second rib 220 of the valve body 200 is K2. Experiments have verified that, when the optimized diaphragm satisfies 0.23≤(L1-K1) / L1≤0.27 and 0.17≤(K1*K2-S1) / K1*K2≤0.23, the diaphragm can fully fill the axial and radial gaps between the valve body and the valve shell without being crushed. This improves the water pressure resistance of the solenoid valve by more than 50%, enhancing its pressure resistance while maintaining the stability of its components.

[0017] Preferably, see Figure 2 and Figure 4The second rib 220 of the valve body includes an annular columnar water-blocking portion 221 connected to the connecting end face and a guide portion 222 that bevels the water-blocking portion and the inner wall surface of the mounting cavity. This guide portion 222 provides guidance during valve body 100 assembly, reducing the possibility of displacement due to impact between the valve body 100 and the diaphragm 300. Furthermore, to further reduce the possibility of the valve body contacting the diaphragm during assembly, which could lead to diaphragm distortion and leakage, the axial height of the guide portion 222 in this embodiment is H1, satisfying H1 / L1≥0.25.

[0018] Furthermore, see Figure 2 The radial distance from the inner wall of the working chamber 21 of the valve body to the mounting platform 110 is R1. In order to prevent the outer ring portion 320 of the diaphragm 300 from being squeezed out of the radial gap between the inner wall of the working chamber 21 and the mounting platform 110, and to further improve the stability of the solenoid valve, the radial width L2 of the outer ring portion 320 of the diaphragm is optimized to satisfy R1 / L2≤0.3.

[0019] Furthermore, see Figure 2 The distance from the radial mounting surface 12 of the valve housing 100 to the radial inner wall of the mounting cavity 21 of the valve body 200 is R2. In order to reduce the compression of the diaphragm 300 after the valve body 100 is assembled and to push the diaphragm 300 into the gap between the radial mounting surface 12 of the valve housing and the radial inner wall of the mounting cavity 21, the radial width L2 of the outer ring portion 320 of the diaphragm is optimized to satisfy R2 / L2≤0.3.

[0020] Furthermore, see Figure 2 The axial distance from the junction of the guide portion 222 of the valve body 200 and the radial inner wall of the mounting cavity 21 to the axial mounting end face 11 of the valve housing is R3. By optimizing the design of the axial height L2 of the outer ring portion 320 of the diaphragm 300, it is made to satisfy R3 / L1≤0.3. This can prevent the axial surface of the outer ring portion 320 of the diaphragm 300 from being squeezed into the gap between the radial mounting surface 12 of the valve housing and the radial inner wall of the mounting cavity 21, which would make it difficult to assemble the valve housing 100 and the valve body 200 into place, thus improving the reliability of the solenoid valve assembly.

[0021] The following are examples of solenoid valves using this invention: 0.23≤(L1-K1) / L1≤0.27, 0.17≤(K1*K2-S1) / K1*K2≤0.23

[0022] The diaphragm 300 of the solenoid valve of this invention has an axial height L1 of 2.3 mm and a radial width L2 of 2.4 mm. The area of ​​the axial cross-section of the outer ring portion 320 of the diaphragm on one side is S1, which is 5.52. By setting the axial distance K1 between the connecting end face 23 of the valve body 200 and the axial mounting end face 11 of the valve housing 100 to 1.7 mm, and setting the radial distance K2 between the mounting platform 110 of the valve housing 100 and the second rib 220 of the valve body 200 to 2.6 mm, it is concluded that:

[0023] The axial compression of the diaphragm is: (L1-K1) / L1=(2.3-1.7) / 2.3=0.26. In this embodiment, the diaphragm compression ranges from 0.23mm to 0.27mm, allowing for free compression and recovery without irreversible permanent compression deformation. Furthermore, the overall compression of the diaphragm is (K1*K2-S1) / K1*K2=(5.52-4.42) / 5.52=0.199. This design allows for multiple reversible compressions within the 0.17mm-0.23mm range. The solenoid valve, after the above design, improves its water pressure resistance from 4MPa to over 6MPa while ensuring the diaphragm is not damaged, thus enhancing the pressure resistance of the solenoid valve while maintaining the stability of its components.

[0024] This utility model is not limited to the above-described embodiments. If any modifications or variations to this utility model do not depart from the spirit and scope of this utility model, and if such modifications and variations fall within the scope of the claims and equivalent technologies of this utility model, then this utility model also intends to include such modifications and variations.

Claims

1. An electromagnetic valve with improved valve body structure, comprising a valve housing (100), a valve body (200) and an opening and closing member comprising a diaphragm (300), a mounting cavity (21) for fixing the valve housing is provided radially on the valve body (200), a working cavity (22) for accommodating the opening and closing member is further provided inside the mounting cavity (21), a connecting end surface (23) for abutting the axial end surface of the diaphragm (300) is provided at the connecting area of the mounting cavity (21) and the working cavity (22), the connecting end surface (23) is axially protruded with a first annular protruding rib (210), the diaphragm (300) comprises a circular inner ring portion (310), a circular ring-shaped outer ring portion (320) and a connecting portion (330) connecting the two, the valve housing (100) is axially provided with an annular mounting platform (110) for abutting the other axial end surface of the diaphragm (300), characterized in that: The inner wall of the installation cavity (21) is radially convex annular second convex ribs (220), the end surface of the valve shell installation platform (110) abutting with the diaphragm (300) is the valve shell axial installation end surface (11), the axial distance between the connecting end surface (23) and the valve shell axial installation end surface (11) is K1, the radial distance between the installation platform (110) and the second convex ribs (220) is K2, the axial height of the outer ring part (320) is L1, the area of the circular ring axial section of the outer ring part (320) is S1, then 0.23≤(L1-K1) / L1≤0.27, 0.17≤(K1*K2-S1) / K1*K2≤0.

23.

2. The solenoid valve according to claim 1, wherein: The second convex ribs (220) include a water retaining part (221) in the form of an annular column connected with the connecting end surface and a guide part (222) which is chamfered to transition from the water retaining part to the inner wall surface of the installation cavity, the axial height of the guide part is H1, and H1 / L1≥0.25 is satisfied.

3. The solenoid valve according to claim 2, wherein: The radial width of the outer ring part (320) is L2, the radial distance from the inner wall surface of the working cavity (22) to the installation platform (110) is R1, and R1 / L2≤0.3 is satisfied.

4. The electromagnetic valve according to claim 3, wherein: The valve shell (100) further includes a valve shell radial installation surface (12) connected with the valve shell axial installation end surface (11) at one end, the distance from the valve shell radial installation surface (12) to the radial inner wall surface of the installation cavity is R2, and R2 / L2≤0.3 is satisfied.

5. The solenoid valve according to claim 4, wherein: The axial distance from the intersection of the guide part (222) and the radial inner wall surface of the installation cavity (21) to the valve shell axial installation end surface (11) is R3, and R3 / L1≤0.3 is satisfied.

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