Anhydrous hammerless valve core assembly and electromagnetic valve

Abstract

The application discloses a water hammer-free valve core assembly and an electromagnetic valve, wherein the valve core assembly comprises a valve core shell, a mounting seat and a balance plug body; the valve core shell comprises a barrel and a gland; a water inlet channel is formed in the barrel; a plurality of water outlets are formed in the side wall of the barrel; a water passing hole is formed in the upper end of the barrel corresponding to the water inlet channel; a sealing surface is formed between the lower end of the balance plug body and the water passing hole; the sealing surface is located above the water outlet; a balance sleeve is mounted in the middle part of the balance plug body; a hollow balance column is movably connected in the balance sleeve; the upper end of the balance column is protruded to the upper end of the balance sleeve; a guide shaft is arranged in the lower end of the gland and always extends into the balance column; a first water flow channel is formed between the guide shaft and the balance column; and a second water flow channel is formed between the balance column and the balance sleeve. The water hammer-free valve core assembly and the electromagnetic valve can prevent water hammer effect, ensure the closing speed and have long service life.

Description

Technical Field

[0001] This invention relates to the field of valve core technology, specifically to a water hammer-free valve core assembly and a solenoid valve. Background Technology

[0002] Most existing domestic water products use low-flow solenoid valves for control. When these products close, water hammer vibration noise is common. When water pressure is too high, the inlet hose vibrates and bounces, especially in multi-story buildings where the noise can be disturbing to neighbors late at night. Currently, existing solenoid valves use various methods to extend the valve closing time to reduce water hammer. For example, a Chinese invention patent (CN102927348B) describes a water hammer-free solenoid valve seat and water circuit structure. This design consists of a solenoid valve, a solenoid valve seat, a valve seat cylinder, a valve plate, and an inlet pressure ring. It changes the structure of the solenoid valve valve plate closing the outlet to closing the inlet. The pressure of the inlet water prevents or slows down the downward closing speed of the valve plate, effectively reducing or avoiding water hammer vibration caused by the valve plate closing rapidly with a snap, thus lowering the vibration noise generated when the domestic water product closes. However, the above methods have the disadvantage of significantly extending the valve closing time, resulting in a poor user experience. Especially when applied to sensor faucets, the valve will not close until a long time after the user's hand leaves the sensor faucet, which can easily lead to water waste.

[0003] For example, Chinese utility model patent (CN217355777U) discloses a water-hammer-resistant constant-flow pulse solenoid valve structure and solenoid valve. This water-hammer-resistant constant-flow pulse solenoid valve structure includes a fixed seat, a bracket, a water-stopping component, a sealing ring, and a constant-flow plate. During operation, water flows through the first through-hole on the constant-flow plate or the gap between the constant-flow plate and the bracket, entering the water-stopping component through the inlet. Specifically, it enters the cavity of the fixed seat through the guide inlet hole formed by the gap between the rubber diaphragm and the through-needle. The water flows through the inlet hole and the drain hole on the fixed seat to form a flow channel. When the drain hole of the fixed seat is open, the water in the cavity of the fixed seat is discharged through the drain hole. Under the influence of force difference, the rubber diaphragm rises upward, and the water-stopping component opens, allowing water to flow out through the inlet and outlet of the bracket. With the drain hole of the fixed seat closed, water slowly enters the fixed seat cavity due to the small cross-sectional area of ​​the inlet hole on the floating seat. The water gradually builds pressure within the fixed seat cavity, causing the rubber diaphragm to slowly close downward, thus closing the water-stopping component and preventing water from flowing out through the outlet of the bracket. By adding a limiting ring inside the rubber diaphragm and using a needle to effectively control the cross-sectional area of ​​the inlet hole on the floating seat, a delayed water-stopping effect is achieved, greatly reducing water hammer and noise. However, the structure of this solenoid valve has the following problems: 1. The rubber diaphragm is always in close contact with the inner wall of the bracket during the up and down movement. It is easily subjected to the pressure of the fixed seat cavity, which causes it to expand and deform, and rubs against the inner wall, making it easy to be damaged; 2. When the rubber diaphragm is in the closed state, the water sealing surface formed is lower than the water outlet. When subjected to the downward force of the water flow in the fixed seat cavity (water stop cavity), it is easy to be partially squeezed to the water outlet. With the accumulation of time, the rubber diaphragm is easy to deform and get stuck at the water outlet and cannot be restored, causing the solenoid valve to malfunction. Summary of the Invention

[0004] The purpose of this invention is to provide a water hammer-free valve core assembly and solenoid valve that can prevent water hammer while ensuring valve closing speed and long service life.

[0005] To achieve the above objectives, the solution of the present invention is:

[0006] A water hammer-free valve core assembly includes a valve core housing, a mounting base, and a balancing plug. The valve core housing includes a cylindrical body and a pressure cap. A water inlet channel is formed inside the cylindrical body, and several water outlets are formed on the side wall of the cylindrical body. A water passage is formed at the upper end of the cylindrical body corresponding to the water inlet channel. The mounting base is disposed above the cylindrical body. The balancing plug is installed inside the mounting base, with its upper end engaged between the mounting base and the pressure cap. The side of the balancing plug near the mounting base is in contact with the inner side wall of the mounting base. The inner side wall of the mounting base is a sloping surface that is wider at the top and narrower at the bottom. The side of the balancing plug near the mounting base is also sloping. A sealing surface is formed between the lower end of the balancing plug and the water passage, and the sealing surface is located above the water outlets. A channel is formed between the sealing surface and the bottom of the mounting base, allowing the balancing plug to deform. This channel communicates with the water outlets.

[0007] A water pressure balancing chamber is formed between the balancing plug and the pressure cap. A balancing kit for opening and closing the water inlet and outlet is installed in the middle of the balancing plug. A hollow balancing column is movably connected inside the balancing kit. The balancing column has a sealing section that is sealed to the balancing kit. The upper end of the balancing column protrudes from the upper end of the balancing kit. A guide shaft that always extends into the balancing column is provided at the lower end of the pressure cap. A first water flow channel is formed between the guide shaft and the balancing column. A second water flow channel is formed between the balancing column and the balancing kit. Several abutting blocks that abut against the upper end of the balancing column are provided at the bottom of the pressure cap.

[0008] The maximum distance between the upper end of the balance column and the upper end of the balance kit is not greater than the distance between the upper end of the balance column and the pressure cap.

[0009] The pressure cap is provided with a guide hole communicating with the water pressure balance chamber. The upper end of the pressure cap is provided with a pressure relief nozzle. The pressure relief nozzle is provided with a pressure relief hole isolated from the guide hole. A pressure relief water flow channel is provided radially inside the pressure cap. The inlet of the pressure relief water flow channel is communicating with the pressure relief hole. The outlet of the pressure relief water flow channel is provided on the side wall of the pressure cap.

[0010] The mounting base has a water outlet channel on its side wall that is connected to the outlet of the pressure relief water flow channel.

[0011] The balancing kit has an inner cavity for accommodating the balancing column. The balancing column has a first balancing section and a second balancing section from top to bottom. The sealing section is connected between the first balancing section and the second balancing section. The inner cavity has a sloping shoulder that is in sealing contact with the sealing section.

[0012] The diameter of the first balancing segment gradually increases from top to bottom, and the diameter of the second balancing segment is larger than the diameter of the first balancing segment.

[0013] The bottom of the balancing kit is equipped with a filter screen, which is located at the water passage hole.

[0014] A solenoid valve includes a solenoid valve head and the aforementioned water hammer-free valve core assembly. The solenoid valve head is disposed outside the water hammer-free valve core assembly, and a moving iron core assembly for sealing the water pressure balance chamber is provided inside the solenoid valve head.

[0015] With the above structure, the water hammer-free valve core assembly of the present invention has the following advantages:

[0016] 1. A sealing surface is formed between the lower end of the balance plug and the water passage hole. This sealing surface is located above the water outlet. A channel is formed between the sealing surface and the bottom of the mounting base, which allows the balance plug to deform. In this way, when the balance plug is subjected to the downward force of the water flow in the water pressure balance chamber, the balance plug deforms in the channel and will not be squeezed to the water outlet, thus avoiding irreversible deformation and extending service life.

[0017] 2. The side of the balance plug near the mounting base is in contact with the inner wall of the mounting base. The inner wall of the mounting base is a sloping surface that is wider at the top and narrower at the bottom. The side of the balance plug near the mounting base is also a sloping surface. This allows the balance plug to have a certain gap with the inner wall of the mounting base during its up and down movement, reducing friction between the balance plug and the inner wall of the mounting base and extending its service life.

[0018] 3. A balancing assembly for opening and closing the inlet and outlet is installed in the middle of the balancing plug body. A hollow balancing column is movably connected inside the balancing assembly. The balancing column can move freely up and down along the guide shaft inside the balancing assembly. During the process of the inlet and outlet changing from open to closed, due to the water pressure difference, the balancing plug body, together with the balancing assembly and the balancing column, is moved downward by the force of the water flow in the water pressure balancing chamber. Since there is a certain stroke difference between the balancing assembly and the balancing column, both the first and second water flow channels are open at this time. The water flow in the balancing assembly is large, and the downward movement speed of the balancing plug body is fast, which shortens the valve closing time. At a certain moment when the inlet and outlet are about to be blocked, the sealing section of the balancing column is sealed to the balancing assembly, the second water flow channel is closed, the first water flow channel remains open, the water flow in the balancing assembly decreases, the downward movement speed of the balancing plug body slows down, and the valve core slowly closes, thereby preventing the generation of water hammer effect.

[0019] Therefore, the water hammer-free valve core assembly of the present invention is used as a solenoid valve, which can prevent water hammer effect while ensuring valve closing speed and long service life. Attached Figure Description

[0020] Figure 1This is a schematic diagram of the structure of an electromagnetic valve according to the present invention;

[0021] Figure 2 This is a cross-sectional structural diagram of an electromagnetic valve according to the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of a water hammer-free valve core assembly according to the present invention.

[0023] In the picture:

[0024] Cylinder 1, Water Inlet Channel 11

[0025] Outlet 12, water passage hole 13

[0026] Mounting column 14, channel 15

[0027] Pressure cap 2 Guide shaft 21

[0028] Block 22, guide hole 23

[0029] Pressure relief hole 24 Pressure relief water flow channel 25

[0030] Mounting base 3, mounting hole 31

[0031] Water outlet channel 32, balance plug 4

[0032] Water pressure balancing chamber 5, balancing kit 6

[0033] Inner cavity 61, filter screen 7

[0034] Balance column 8, first balance section 81

[0035] Sealing section 82 Second balance section 83

[0036] First water flow channel 91 Second water flow channel 92

[0037] Solenoid valve head 1a Moving iron core assembly 2a Detailed Implementation

[0038] To further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0039] Example 1

[0040] A water hammer-free valve core assembly, such as Figures 1-3 As shown, the valve core housing includes a cylinder 1 and a pressure cap 2. A water inlet channel 11 is provided inside the cylinder 1, and several water outlets 12 are provided on the side wall of the cylinder 1. A water passage 13 is formed at the upper end of the cylinder 1 corresponding to the water inlet channel 11.

[0041] It also includes a mounting base 3 and a balance plug 4. The mounting base 3 is a hollow ring shape. The lower end of the mounting base 3 is provided with several mounting holes 31. The upper end of the cylinder 1 is provided with several mounting posts 14 that can be inserted into the corresponding mounting holes 31. The mounting base 3 is fixed above the cylinder 1 by the cooperation of the mounting holes 31 and the mounting posts 14.

[0042] The balancing plug 4 is made of rubber and is nested inside the mounting base 3. The upper end of the balancing plug 4 is locked between the mounting base 3 and the pressure cap 2. The side of the balancing plug 4 near the mounting base 3 is in contact with the inner wall of the mounting base 3. The inner wall of the mounting base 3 is a sloping surface that is wider at the top and narrower at the bottom. The side of the balancing plug 4 near the mounting base 3 is also a sloping surface.

[0043] A sealing surface is formed between the lower end of the balance plug 4 and the water passage 13, and the sealing surface is located above the water outlet 12. A channel 15 is formed between the sealing surface and the bottom of the mounting base 3, which allows the balance plug 4 to deform and communicates with the water outlet 12.

[0044] A water pressure balancing chamber 5 is formed between the balancing plug 4 and the pressure cap 2. A balancing kit 6 for opening and closing the inlet channel 11 and the outlet 12 is installed in the middle of the balancing plug 4. An annular groove is formed on the side wall of the balancing kit 6 near the balancing plug 4 to engage with the inner side wall of the balancing plug 4, thereby installing the balancing kit 6 on the balancing plug 4. Preferably, a filter screen 7 is provided at the bottom of the balancing kit 6, and the filter screen 7 is located at the water passage 13.

[0045] The balancing kit 6 has an inner cavity 61 that communicates with the water inlet channel 11. A hollow balancing column 8 is movably connected inside the inner cavity 61. The lower end of the pressure cap 2 is provided with a guide shaft 21 that always extends into the balancing column 8. A first water flow channel 91 is formed between the guide shaft 21 and the balancing column 8. The balancing column 8 can move freely up and down inside the inner cavity 61 along the guide shaft 21.

[0046] The balance column 8 has a first balance section 81, a sealing section 82, and a second balance section 83 from top to bottom. The diameter of the first balance section 81 gradually increases from top to bottom, and the diameter of the second balance section 83 is larger than that of the first balance section 81. The sealing section 82 connects the first balance section 81 and the second balance section 83. The shape of the inner cavity 61 is adapted to the shape of the balance column 8, and it has a sloping shoulder that makes sealing contact with the sealing section 82. With this configuration, when the balance plug 4, together with the balance kit 6 and the balance column 8, is subjected to a force and moves downward at a certain instant, a seal can be achieved between the sealing kit 6 and the balance column 8.

[0047] When the balance column 8 and the balance kit 6 are in a sealed state, the upper end of the balance column 8 protrudes from the upper end of the balance kit 6, and the maximum distance between the upper end of the balance column 8 and the upper end of the balance kit 6 is no greater than the distance between the upper end of the balance column 8 and the pressure cap 2. A second water flow channel 92 is formed between the balance column 8 and the balance kit 6, and the second water flow channel 92 is in a closed state when the balance column 8 and the balance kit 6 are in a sealed state.

[0048] The bottom of the pressure cap 2 is provided with several abutting blocks 22 that abut against the upper end of the balance column 8. This is designed to prevent the first water flow channel 91 from being blocked.

[0049] The pressure cap 2 has a guide hole 23 connected to the water pressure balance chamber 5. A pressure relief nozzle is located at the upper end of the pressure cap 2, and a pressure relief hole 24, isolated from the guide hole 23, is located inside the pressure cap 2. A pressure relief water flow channel 25 is arranged radially inside the pressure cap 2, and the pressure relief water flow channel 25 is not connected to the guide hole 23. The inlet of the pressure relief water flow channel 25 is connected to the pressure relief hole 24, and the outlet of the pressure relief water flow channel 25 is located on the side wall of the pressure cap 2. An outlet channel 32 is provided on the side wall of the mounting base 3, connected to the outlet of the pressure relief water flow channel 25. The outlet channel 32 is connected to the outlet 12 of the cylinder 1, thereby achieving the pressure relief function.

[0050] Example 2

[0051] A type of solenoid valve, such as Figures 1-2 As shown, the device includes a solenoid valve head 1a and the water hammer-free valve core assembly in Embodiment 1. The solenoid valve head 1a contains a moving iron core assembly 2a for sealing the pressure relief hole 24. The moving iron core assembly 2a moves up and down to open or close the pressure relief hole 24 on the pressure relief nozzle. The solenoid valve head 1a is covered by the water hammer-free valve core assembly. The solenoid valve head 1a and the water hammer-free valve core assembly are installed in a conventional manner. The upper end of the solenoid valve head 1a is sealed to the pressure cap 2, and the bottom of the solenoid valve head 1a is also sealed to the cylinder 1. There is a water outlet gap between the side wall of the solenoid valve head 1a and the pressure cap 2, the mounting base 3, and the cylinder 11, thereby ensuring that the water outlet channel 32 can be connected to the outlet of the pressure relief water flow channel 25.

[0052] The working process of this solenoid valve is as follows:

[0053] When the inlet channel 11 and the outlet 12 are blocked, the lower end of the balance plug 4 is sealed with the water passage 13. When the moving iron core assembly 2a moves upward and opens the pressure relief hole 24 on the pressure relief nozzle, the water in the water pressure balance chamber 5 flows sequentially through the guide hole 23 on the pressure cover 2, the pressure relief hole 24 on the pressure relief nozzle, and the water outlet channel 32 on the mounting base 3, and then flows out from the water outlet 12 of the cylinder 1. At this time, the water pressure in the water inlet channel 11 is greater than the water pressure in the water pressure balance chamber 5. Therefore, under the action of this pressure difference, the balance plug 4, the balance kit 6, and the balance column 8 located at a certain position in the inner cavity 61 move upward, so that the water inlet channel 11 and the water outlet 12 are connected, and a large flow of water flows out. At a certain moment when the balance column 8 and the balance kit 6 are in a sealed state, the second water flow channel 92 is closed, and the first water flow channel 91 continues to open. After that, it continues to move upward, and the balance column 8 and the balance kit 6 separate again to create a gap. The second water flow channel 92 opens, and the water inlet in the water pressure balance chamber 5 becomes faster.

[0054] Conversely, when the moving iron core assembly 2a moves down to close the pressure relief hole 24 on the pressure relief nozzle, a small amount of water continues to enter the water pressure balance chamber 5 through the first water flow channel 91 and the second water flow channel 92. The water pressure in the water pressure balance chamber 5 increases. In order to maintain balance with the water pressure in the water inlet channel 11, the balance plug 4 slides down, and the balance kit 6 and the balance column 8 are also moved down by the force. The water passage 13 is sealed again, and the water flow between the water inlet channel 11 and the water outlet 12 is cut off again.

[0055] From the above structure and working process, it can be seen that the water hammer-free valve core assembly of the present invention has the following advantages:

[0056] 1. A sealing surface is formed between the lower end of the balance plug 4 and the water passage 13. This sealing surface is located above the water outlet 12. A channel 15 is formed between the sealing surface and the bottom of the mounting base 3, which allows the balance plug 4 to deform. In this way, when the balance plug 4 is subjected to the downward force of the water flow in the water pressure balance chamber 5, the balance plug 4 can deform in the channel 15 and will not be squeezed to the water outlet 12, thus avoiding irreversible deformation and extending service life.

[0057] 2. The side of the balance plug 4 near the mounting base 3 is in contact with the inner wall of the mounting base 3. The inner wall of the mounting base 3 is a sloping surface that is wider at the top and narrower at the bottom. The side of the balance plug 4 near the mounting base 3 is also a sloping surface. In this way, the balance plug 4 can have a certain gap with the inner wall of the mounting base 3 during the up and down movement, which reduces the friction between the balance plug 4 and the inner wall of the mounting base 3 and extends the service life.

[0058] 3. During the process of the water inlet channel 11 and the water outlet 12 changing from open to closed, due to the water pressure difference, the balancing kit 6 and the balancing column 8 of the balancing plug 4 are subjected to a force and move downward. Since there is a certain stroke difference between the balancing kit 6 and the balancing column 8, the first water flow channel 91 and the second water flow channel 92 are both in the open state. The diameter of the first balancing section 81 gradually increases from top to bottom. The water flow in the balancing kit 6 is large, and the downward movement speed of the balancing plug 4 is fast, which shortens the valve closing time. At a certain moment when the water inlet channel 11 and the water outlet 12 are about to be blocked, the sealing section 82 of the balancing column 8 is sealed and connected to the inclined shoulder of the balancing kit 6. The second water flow channel 92 is closed, and the first water flow channel 91 continues to be open. The water flow in the balancing kit 6 becomes smaller, the downward movement speed of the balancing plug 4 slows down, and the valve core slowly closes, thereby preventing the generation of water hammer effect.

[0059] 4. A filter screen 7 is installed at the bottom of the balance kit 6. It can not only purify the water, but also self-clean the filter screen 7 as the water flow is turned on and off.

[0060] Therefore, the water hammer-free valve core assembly of the present invention is used as a solenoid valve, which can prevent water hammer effect while ensuring valve closing speed and long service life.

[0061] The above embodiments and figures are not intended to limit the product form and style of the present invention. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of the present invention.

Claims

1. A water hammer-free valve core assembly, comprising a valve core housing, a mounting base, and a balancing plug, wherein the valve core housing includes a cylindrical body and a gland, the cylindrical body has an inlet channel, the side wall of the cylindrical body has a plurality of outlets, the upper end of the cylindrical body corresponding to the inlet channel has a through hole, the mounting base is disposed above the cylindrical body, and the balancing plug is installed in the mounting base, characterized in that: The upper end of the balance plug is engaged between the mounting base and the pressure cap. The side of the balance plug near the mounting base is in contact with the inner wall of the mounting base. The inner wall of the mounting base is a sloping surface that is wider at the top and narrower at the bottom. The side of the balance plug near the mounting base is also a sloping surface. The lower end of the balance plug forms a sealing surface with the water passage hole. The sealing surface is located above the water outlet. A channel is formed between the sealing surface and the bottom of the mounting base, which allows the balance plug to deform. This channel communicates with the water outlet. A water pressure balancing chamber is formed between the balancing plug and the pressure cap. A balancing kit for opening and closing the water inlet and outlet is installed in the middle of the balancing plug. A hollow balancing column is movably connected inside the balancing kit. The balancing column has a sealing section that is sealed to the balancing kit. The upper end of the balancing column protrudes from the upper end of the balancing kit. A guide shaft that always extends into the balancing column is provided at the lower end of the pressure cap. A first water flow channel is formed between the guide shaft and the balancing column. A second water flow channel is formed between the balancing column and the balancing kit. Several abutting blocks that abut against the upper end of the balancing column are provided at the bottom of the pressure cap.

2. The water hammer-free valve core assembly according to claim 1, characterized in that: The maximum distance between the upper end of the balance column and the upper end of the balance kit is not greater than the distance between the upper end of the balance column and the pressure cap.

3. The water hammer-free valve core assembly according to claim 1, characterized in that: The pressure cap is provided with a guide hole communicating with the water pressure balance chamber. The upper end of the pressure cap is provided with a pressure relief nozzle. The pressure relief nozzle is provided with a pressure relief hole isolated from the guide hole. A pressure relief water flow channel is provided radially inside the pressure cap. The inlet of the pressure relief water flow channel is communicating with the pressure relief hole. The outlet of the pressure relief water flow channel is provided on the side wall of the pressure cap.

4. The water hammer-free valve core assembly according to claim 3, characterized in that: The mounting base has a water outlet channel on its side wall that is connected to the outlet of the pressure relief water flow channel.

5. A water hammer-free valve core assembly according to claim 1, characterized in that: The balancing kit has an inner cavity for accommodating the balancing column. The balancing column has a first balancing section and a second balancing section from top to bottom. The sealing section is connected between the first balancing section and the second balancing section. The inner cavity has a sloping shoulder that is in sealing contact with the sealing section.

6. A water hammer-free valve core assembly according to claim 5, characterized in that: The diameter of the first balancing segment gradually increases from top to bottom, and the diameter of the second balancing segment is larger than the diameter of the first balancing segment.

7. A water hammer-free valve core assembly according to claim 1, characterized in that: The bottom of the balancing kit is equipped with a filter screen, which is located at the water passage hole.

8. A solenoid valve, characterized in that: It includes a solenoid valve head and a water hammer-free valve core assembly as described in claim 1, wherein the solenoid valve head is disposed outside the water hammer-free valve core assembly, and the solenoid valve head is provided with a moving iron core assembly for sealing the water pressure balance chamber.

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