A solenoid valve and its diaphragm assembly

Abstract

This invention relates to the field of fluid control valves, and particularly to a solenoid valve and its diaphragm assembly. The invention discloses a solenoid valve and its diaphragm assembly, wherein the diaphragm assembly includes a diaphragm body, a diaphragm holder, and a pressure boosting channel. The pressure boosting channel includes a main pressure boosting channel and a secondary pressure boosting channel. The main pressure boosting channel is configured to be normally open; the secondary pressure boosting channel is configured to be closed after the diaphragm assembly moves a certain distance from the valve open position to the valve closed position. This invention can reduce water hammer while shortening the valve closing time.

Description

Technical Field

[0001] This invention belongs to the field of fluid control valves, and specifically relates to a solenoid valve and its diaphragm assembly. Background Technology

[0002] Solenoid valves are valve components that use electromagnetic induction to control the opening or closing of the valve. They are suitable for controlling various fluids, including liquids and gases. Because solenoid valves can be used with different circuits to achieve the desired control, and offer both precision and flexibility while remaining simple to operate, they are widely used in modern industrial automation control systems. However, solenoid valves are prone to water hammer when closed. Water hammer can cause strong vibrations and noise in the piping system, disturbing residents' rest during quiet times, and potentially damaging valve joints, resulting in significant damage to the piping system. Therefore, it is necessary to improve the water hammer mechanism.

[0003] The water hammer effect of solenoid valves is mainly determined by the shut-off time. The larger the pressure boosting channel, the shorter the shut-off time, and the greater the water flow impact at the moment of valve closure, resulting in a stronger water hammer. To reduce water hammer to the national standard of 0.2MPa, existing solenoid valves that have experienced water hammer often need to have a very small pressure boosting channel, leading to a longer shut-off time, sometimes exceeding the national standard requirement of 1.5 seconds. This results in a poor user experience and also wastes water resources due to the delayed shut-off. Summary of the Invention

[0004] The purpose of this invention is to provide a solenoid valve and its diaphragm assembly to solve the aforementioned technical problems.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a diaphragm assembly of a solenoid valve, comprising a diaphragm body, a diaphragm frame, and a pressure boosting channel, wherein the pressure boosting channel comprises a main pressure boosting channel and a secondary pressure boosting channel, the main pressure boosting channel being configured to be normally open; and the secondary pressure boosting channel being configured to be closed when the diaphragm assembly moves a certain distance from the valve open position to the valve closed position.

[0006] Furthermore, the diaphragm body includes a first surface facing the valve closing direction and a second surface facing the valve opening direction. The diaphragm frame includes a diaphragm frame body and a fixing part. The diaphragm frame body is disposed on the second surface of the diaphragm body, and the fixing part is disposed on the first surface of the diaphragm frame body and is fixedly inserted through the diaphragm body.

[0007] Furthermore, a protruding post is provided on the first surface of the diaphragm frame body. The protruding post has a water inlet channel that penetrates the free end of the protruding post and the second surface of the diaphragm frame body. The outer circumferential surface of the protruding post has a water inlet groove along the axial direction of the protruding post. The two ends of the water inlet groove extend to the free end of the protruding post and the first surface of the diaphragm frame body, respectively. The diaphragm body has a through hole that penetrates its first and second surfaces. The protruding post moves through the through hole. When the diaphragm assembly is in the open valve position, the second end face of the through hole is separated from the first surface of the diaphragm frame body. When the diaphragm assembly moves a certain distance from the open valve position to the closed valve position, the second end face of the through hole is attached to the first surface of the diaphragm frame body, thereby making the water inlet channel a main pressurization channel and the water inlet groove a secondary pressurization channel.

[0008] Furthermore, there are two water inlet channels, which are respectively set on opposite sides of the protruding column.

[0009] Furthermore, the protruding post has a cylindrical structure.

[0010] Furthermore, the first surface of the diaphragm frame body is provided with a protrusion, the protrusion having a water inlet channel penetrating the free end of the protrusion and the second surface of the diaphragm frame body. The diaphragm body is provided with a first through hole and a second through hole penetrating its first and second surfaces. The protrusion passes through the first through hole. When the diaphragm assembly is in the open valve position, the second end face of the second through hole is separated from the first surface of the diaphragm frame body. When the diaphragm assembly moves a certain distance from the open valve position to the closed valve position, the second end face of the second through hole is attached to the first surface of the diaphragm frame body, thereby making the water inlet channel a main pressurization channel and the second through hole a secondary pressurization channel.

[0011] Furthermore, the protruding post has a cylindrical structure.

[0012] Furthermore, the diaphragm body is provided with a third through hole and a fourth through hole penetrating its first and second surfaces. The second end of the third through hole is located on the outside of the diaphragm frame body. When the diaphragm assembly is in the open valve position, the second end face of the fourth through hole is separated from the first surface of the diaphragm frame body. When the diaphragm assembly moves a certain distance from the open valve position to the closed valve position, the second end face of the fourth through hole is attached to the first surface of the diaphragm frame body, thereby making the third through hole a main pressurization channel and the fourth through hole a secondary pressurization channel.

[0013] Furthermore, the first through hole has a bent structure.

[0014] The present invention also discloses a solenoid valve, including a solenoid valve head, a valve body and a diaphragm assembly, wherein the diaphragm assembly is the diaphragm assembly described above.

[0015] Beneficial technical effects of the present invention:

[0016] This invention provides a main pressurization channel and a secondary pressurization channel on the diaphragm assembly. The main pressurization channel is set to be normally open, while the secondary pressurization channel is set to be closed when the diaphragm assembly moves a certain distance from the valve open position to the valve closed position. This reduces water hammer, shortens valve closing time, improves user experience, and saves water resources. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a cross-sectional view of the solenoid valve in the open state according to Embodiment 1 of the present invention;

[0019] Figure 2 This is a cross-sectional view of the solenoid valve in the closed state according to Embodiment 1 of the present invention.

[0020] Figure 3 This is a structural diagram of the diaphragm assembly according to Embodiment 1 of the present invention;

[0021] Figure 4 This is a structural diagram of the diaphragm assembly according to Embodiment 1 of the present invention from another perspective;

[0022] Figure 5 This is an exploded view of the diaphragm assembly according to Embodiment 1 of the present invention;

[0023] Figure 6 This is a cross-sectional view of the diaphragm assembly in the valve-closed position according to Embodiment 1 of the present invention;

[0024] Figure 7 This is a cross-sectional view of the diaphragm assembly in the valve-open position according to Embodiment 1 of the present invention;

[0025] Figure 8 This is a structural diagram of the diaphragm assembly according to Embodiment 2 of the present invention;

[0026] Figure 9 This is a cross-sectional view of the diaphragm assembly in the valve-closed position according to Embodiment 2 of the present invention;

[0027] Figure 10 This is a structural diagram of the membrane body according to Embodiment 2 of the present invention;

[0028] Figure 11 This is a structural diagram of the diaphragm assembly according to Embodiment 3 of the present invention;

[0029] Figure 12 This is a cross-sectional view of the diaphragm assembly in the valve-closed position according to Embodiment 3 of the present invention;

[0030] Figure 13 This is a structural diagram of the membrane body in Embodiment 3 of the present invention. Detailed Implementation

[0031] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, primarily used to illustrate the embodiments and to explain the operating principles of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0032] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0033] Example 1

[0034] like Figure 1-7 As shown, a solenoid valve includes a diaphragm assembly 1, a valve body 2, and a solenoid valve head 3. The valve body 2 has an inlet 21, an outlet 22, and a water passage 23 connecting the inlet 21 and the outlet 22. The diaphragm assembly 1 is disposed inside the valve body 2. The solenoid valve head 3 is used to control the diaphragm assembly 1 to open or close the water passage 23 to realize the valve opening or closing. More specific structures can be referred to existing solenoid valves. This is not an improvement of the present invention and will not be described further.

[0035] Diaphragm assembly 1 includes diaphragm body 11, diaphragm holder 12, and pressurization channel 13. Pressurization channel 13 includes a main pressurization channel 131 and a secondary pressurization channel 132. The main pressurization channel 131 is set to a normally open state, meaning it remains open regardless of whether diaphragm assembly 1 is in the open position (e.g., ...). Figure 1 (as shown) or the valve is closed (e.g.) Figure 2 As shown), the main pressurization channel 131 is always connected to the water pressure balance chamber 4 and the water inlet channel 21; the secondary pressurization channel 132 is set to be shut off after the diaphragm assembly 1 moves a certain distance from the valve open position to the valve closed position (before reaching the fully closed position), and is not connected to the water pressure balance chamber 4.

[0036] In this specific embodiment, the diaphragm body 11 includes a direction of movement toward the valve closing direction (in this specific embodiment, a downward direction, so as to...). Figure 1 The diaphragm body 11 has a first surface 111 (for directional reference) and a second surface 112 (for valve opening movement direction, upward direction). The first surface 111 is used to seal against the water passage 23 when the valve is closed, thereby closing the water passage 23. The diaphragm body 11 is preferably made of rubber material, but is not limited to this. In some embodiments, it may also be made of other materials with a certain degree of elasticity.

[0037] The diaphragm holder 12 includes a diaphragm holder body 121 and a fixing part 122. The diaphragm holder body 121 is disposed on the second surface 112 of the diaphragm body 11. When the valve is closed, the first surface 1211 of the diaphragm holder body 121 is in contact with the second surface 112 of the diaphragm body 11. The fixing part 122 is disposed on the first surface 1211 of the diaphragm holder body 121. The diaphragm body 11 is provided with a fixing hole 113 that penetrates the first surface 111 and the second surface 112. The fixing part 122 is fixedly disposed through the fixing hole 113, and the lower end of the fixing part 122 is larger than the size of the fixing hole 113, thereby restricting the fixing part 122 from disengaging from the fixing hole 113. For a more specific structure, please refer to the diaphragm assembly structure of the existing solenoid valve, which will not be described in detail here.

[0038] A protrusion 14 is provided on the first surface 1211 of the diaphragm frame body 121. The protrusion 14 has a water inlet channel 141 that passes through the free end (lower end face) of the protrusion 14 and the second surface 1212 of the diaphragm frame body 121. The outer peripheral surface of the protrusion 14 has a water inlet groove 142 along the axial direction of the protrusion 14. The two ends of the water inlet groove 142 extend to the free end of the protrusion 14 and the first surface 1211 of the diaphragm frame body 121, respectively. The diaphragm body 11 has a through hole 114 that passes through its first surface 111 and second surface 112. The protrusion 14 is movably inserted through the through hole 114. The first end of the through hole 114 is connected to the water inlet 21. When the diaphragm assembly 1 is in the open valve position, the second end face of the through hole 114 is separated from the first surface 1211 of the diaphragm frame body 121. Figure 7 As shown, when the diaphragm assembly 1 is in the open position, the diaphragm body 11 located outside the mounting hole 113 will deform and separate from the first surface 1211 of the diaphragm frame body 121 to form a certain gap. The through hole 114 is located in the area of ​​the diaphragm body 11, so that the water inlet groove 142 is connected and communicates with the water pressure balance chamber 4. When the diaphragm assembly 1 moves a certain distance from the open position to the closed position but has not reached the fully closed position (that is, there is still a first certain distance from the fully closed position), the second surface 112 of the diaphragm body 11 fits with the first surface 1211 of the diaphragm frame body 121, so that the second end face of the through hole 113 fits with the first surface 1211 of the diaphragm frame body 121, as shown. Figure 6 As shown, the water inlet tank 142 is shut off, disconnecting it from the water pressure balance chamber 4, thereby making the water inlet channel 141 the main pressurization channel 131 and the water inlet tank 142 the secondary pressurization channel 132.

[0039] In this specific embodiment, there are two water inlet troughs 142, which are respectively arranged on opposite sides of the protrusion 14, resulting in better symmetry and increased flow rate of the secondary pressurization channel 132. However, it is not limited to this. In some embodiments, the number of water inlet troughs 142 may be one, three, or more than three.

[0040] In this specific embodiment, the protruding post 14 is a cylindrical structure with good symmetry and is easy to manufacture, but it is not limited to this. In some embodiments, the protruding post 14 can also be other prism structures.

[0041] When the solenoid valve begins to close, the diaphragm assembly 1 is in the open position. At this time, both the main boosting channel 131 and the secondary boosting channel 132 are in the conducting state, which makes the water pressure balance chamber 4 pressurize quickly. The diaphragm frame 12 and the diaphragm body 11 located below the diaphragm frame 12 descend quickly, and the valve closes quickly (shortening the valve closing time). When the diaphragm assembly 1 is close to the fully closed position, the second end face of the through hole 113 seals and fits with the first surface 1211 of the diaphragm frame body 121, which shuts off the secondary boosting channel 132. The boosting channel 13 of the diaphragm assembly 1 becomes smaller, the water closing time slows down, water hammer is reduced, and the overall valve closing time is shortened, improving the user experience and saving water resources.

[0042] Example 2

[0043] like Figure 8-10 As shown, the main difference between this embodiment and Embodiment 1 lies in the structure of the pressurization channel 13. Specifically, in this embodiment, a protrusion 15 is provided on the first surface 1211 of the diaphragm frame body 121. The protrusion 15 has a water inlet channel 151 that passes through the free end (lower end face) of the protrusion 15 and the second surface 1212 of the diaphragm frame body 121. The diaphragm body 11 has a first through hole 115 and a second through hole 116 that pass through its first surface 111 and second surface 112. The first ends of the first through hole 115 and the second through hole 116 are both connected to the water inlet 21. The protrusion 15 passes through the first through hole 115. 15. When the diaphragm assembly 1 is in the open valve position, the second end face of the second through hole 116 is separated from the first surface 1211 of the diaphragm frame body 121. When the diaphragm assembly 1 moves a certain distance from the open valve position to the closed valve position but has not reached the fully closed valve position (that is, there is still a first certain distance from the fully closed valve position), the second end face of the second through hole 116 is attached to the first surface 1211 of the diaphragm frame body 121. For more details, please refer to the through hole 114 structure in Embodiment 1. This will not be elaborated further, so that the water inlet channel 151 constitutes the main pressurization channel 131 and the second through hole 116 constitutes the secondary pressurization channel 132.

[0044] In this specific embodiment, the protruding post 15 is a cylindrical structure with good symmetry and is easy to manufacture, but it is not limited to this. In some embodiments, the protruding post 15 can also be other prism structures.

[0045] When the solenoid valve begins to close, the diaphragm assembly 1 is in the open position. At this time, both the main pressurization channel 131 and the secondary pressurization channel 132 are in the conducting state, which makes the water pressure balance chamber 4 pressurize quickly. The diaphragm frame 12 and the diaphragm body 11 located below the diaphragm frame 12 descend quickly, and the valve closes quickly (shortening the valve closing time). When the diaphragm assembly 1 is close to the fully closed position, the second end face of the second through hole 116 seals and fits with the first surface 1211 of the diaphragm frame body 121, which shuts off the secondary pressurization channel 132. The pressurization channel 13 of the diaphragm assembly 1 becomes smaller, the water closing time slows down, water hammer is reduced, and the overall valve closing time is shortened, improving the user experience and saving water resources.

[0046] Example 3

[0047] like Figure 11-13 As shown, the main difference between this embodiment and Embodiment 1 lies in the structure of the pressurization channel 13. Specifically, in this embodiment, the diaphragm body 11 is provided with a third through hole 117 and a fourth through hole 118 penetrating its first surface 111 and second surface 112. The first ends of the third through hole 117 and the fourth through hole 118 are connected to the water passage hole 21, and the second end of the third through hole 117 is located on the outside of the diaphragm frame body 12. Thus, regardless of whether the diaphragm assembly 1 is in the open or closed position, the third through hole 117 is connected to the water pressure balance chamber 4. When the diaphragm assembly 1 is in the open position... When the diaphragm assembly 1 moves a certain distance from the valve open position to the valve close position but has not yet reached the fully closed position (that is, there is still a first certain distance from the fully closed position), the second end face of the fourth through hole 118 is in contact with the first surface 1211 of the diaphragm frame body 121. For more details, please refer to the through hole 114 structure in Embodiment 1, which will not be elaborated here. Thus, the third through hole 117 constitutes the main pressurization channel 131 and the fourth through hole 118 constitutes the secondary pressurization channel 132.

[0048] In this specific embodiment, the third through hole 117 has a bent structure, which is more reasonable and easier to implement, but it is not limited to this.

[0049] When the solenoid valve begins to close, the diaphragm assembly 1 is in the open position. At this time, both the main boosting channel 131 and the secondary boosting channel 132 are in the conducting state, which makes the water pressure balance chamber 4 pressurize quickly. The diaphragm frame 12 and the diaphragm body 11 located below the diaphragm frame 12 descend quickly, and the valve closes quickly (shortening the valve closing time). When the diaphragm assembly 1 is close to the fully closed position, the second end face of the fourth through hole 118 seals and fits with the first surface 1211 of the diaphragm frame body 121, which shuts off the secondary boosting channel 132. The boosting channel 13 of the diaphragm assembly 1 becomes smaller, the water closing time slows down, water hammer is reduced, and the overall valve closing time is shortened, improving the user experience and saving water resources.

[0050] The present invention provides a main pressurization channel 131 and a secondary pressurization channel 132 on the diaphragm assembly 1. The main pressurization channel 131 is set to be normally open. The secondary pressurization channel 132 is set to be closed when the diaphragm assembly 1 moves a certain distance from the valve open position to the valve closed position. This reduces water hammer, shortens valve closing time, improves user experience and saves water resources.

[0051] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A diaphragm assembly for a solenoid valve, comprising a diaphragm body, a diaphragm holder, and a pressurization channel, characterized in that: The pressurization channel includes a main pressurization channel and a secondary pressurization channel. The main pressurization channel is set to be normally open. The secondary pressurization channel is set to be turned off when the diaphragm assembly moves a certain distance from the open valve position to the closed valve position and before it reaches the closed valve position. The diaphragm body includes a first surface facing the valve closing direction and a second surface facing the valve opening direction. The diaphragm frame includes a diaphragm frame body and a fixing part. The diaphragm frame body is disposed on the second surface of the diaphragm body, and the fixing part is disposed on the first surface of the diaphragm frame body and is fixedly passed through the diaphragm body. Wherein, a gap is formed between the first surface of the diaphragm holder body and the second surface of the diaphragm body; the secondary pressurization channel communicates with the first surface of the diaphragm body and extends to the gap; when the diaphragm assembly is in the valve open position, the first surface of the diaphragm holder body separates from the second surface of the diaphragm body corresponding to the secondary pressurization channel, causing the gap to open so that the secondary pressurization channel is in a conductive state; after the diaphragm assembly moves a certain distance from the valve open position to the valve closed position and before moving to the valve closed position, the first surface of the diaphragm holder body and the second surface of the diaphragm body corresponding to the secondary pressurization channel are attached, causing the gap to close so that the secondary pressurization channel is shut off.

2. The diaphragm assembly of the solenoid valve according to claim 1, characterized in that: A protruding post is provided on the first surface of the diaphragm frame body. The protruding post has a water inlet channel that penetrates the free end of the protruding post and the second surface of the diaphragm frame body. A water inlet groove is provided on the outer circumferential surface of the protruding post along the axial direction of the protruding post. The two ends of the water inlet groove extend to the free end of the protruding post and the first surface of the diaphragm frame body, respectively. The diaphragm body has a through hole that penetrates its first and second surfaces. The protruding post moves through the through hole. When the diaphragm assembly is in the open valve position, the second end face of the through hole is separated from the first surface of the diaphragm frame body. When the diaphragm assembly moves a certain distance from the open valve position to the closed valve position, the second end face of the through hole is attached to the first surface of the diaphragm frame body, so that the water inlet channel constitutes the main pressurization channel and the water inlet groove constitutes the secondary pressurization channel.

3. The diaphragm assembly of the solenoid valve according to claim 2, characterized in that: There are two water inlet channels, which are respectively set on opposite sides of the protruding column.

4. The diaphragm assembly of the solenoid valve according to claim 2, characterized in that: The protruding post has a cylindrical structure.

5. The diaphragm assembly of the solenoid valve according to claim 1, characterized in that: The first surface of the diaphragm frame body is provided with a protrusion, the protrusion has a water inlet channel that passes through the free end of the protrusion and the second surface of the diaphragm frame body. The diaphragm body is provided with a first through hole and a second through hole that pass through its first and second surfaces. The protrusion passes through the first through hole. When the diaphragm assembly is in the open valve position, the second end face of the second through hole is separated from the first surface of the diaphragm frame body. When the diaphragm assembly moves a certain distance from the open valve position to the closed valve position, the second end face of the second through hole is attached to the first surface of the diaphragm frame body, so that the water inlet channel constitutes the main pressurization channel and the second through hole constitutes the secondary pressurization channel.

6. The diaphragm assembly of the solenoid valve according to claim 5, characterized in that: The protruding post has a cylindrical structure.

7. The diaphragm assembly of the solenoid valve according to claim 1, characterized in that: The diaphragm body is provided with a third through hole and a fourth through hole penetrating its first and second surfaces. The second end of the third through hole is located on the outside of the diaphragm frame body. When the diaphragm assembly is in the open valve position, the second end face of the fourth through hole is separated from the first surface of the diaphragm frame body. When the diaphragm assembly moves a certain distance from the open valve position to the closed valve position, the second end face of the fourth through hole is attached to the first surface of the diaphragm frame body, thereby making the third through hole a main pressurization channel and the fourth through hole a secondary pressurization channel.

8. The diaphragm assembly of the solenoid valve according to claim 7, characterized in that: The third through hole has a bent structure.

9. A solenoid valve, comprising a solenoid valve head, a valve body, and a diaphragm assembly, characterized in that: The diaphragm assembly is the diaphragm assembly according to any one of claims 1-8.

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