Valve element assembly and electromagnetic valve

Abstract

The valve element assembly comprises a valve element shell, an installation base and a balance plug body, the valve element shell comprises a barrel and a gland, a water inlet hole channel is formed in the barrel, a plurality of water outlets are formed in the side wall of the barrel, and a water passing hole is formed in the upper end, corresponding to the water inlet hole channel, of the barrel; a sealing face is formed between the lower end of the balance plug body and the water passing hole and located above the water outlet, a balance sleeve piece is installed in the middle of the balance plug body, a guide shaft is arranged at the lower end of the gland, and a water flow channel is formed between the guide shaft and the balance sleeve piece. According to the valve element assembly and the electromagnetic valve, the water hammer effect can be prevented, and the service life is long.

Description

Technical Field

[0001] This utility model relates to the field of valve core technology, specifically to a valve core assembly and a solenoid valve. Background Technology

[0002] Most existing domestic water products use solenoid valves for control. When these valves are closed, water hammer vibrations are common. When water pressure is too high, the inlet hose vibrates and bounces, especially in multi-story buildings where the noise from water hammer can disturb neighbors, particularly late at night. Currently, existing solenoid valves employ various methods to extend the valve closing time to reduce water hammer.

[0003] For example, Chinese utility model patent (CN217355777U) discloses a water-damping constant current pulse solenoid valve structure and solenoid valve. This water-damping constant current pulse solenoid valve structure includes a fixed seat, a bracket, a water-stopping component, a sealing ring, and a constant current plate. During operation, water flows through the first through-hole on the constant current plate or the gap between the constant current plate and the bracket, entering the water-stopping component through the inlet. Specifically, it enters the cavity of the fixed seat through a guide inlet formed by the gap between the rubber diaphragm and the through-needle. The water flows through the inlet and outlet holes on the fixed seat to form a flow channel. When the outlet hole of the fixed seat is open, the water in the cavity of the fixed seat is discharged through the outlet 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. Over 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. Utility Model Content

[0004] The purpose of this invention is to provide a valve core assembly and a solenoid valve that can prevent water hammer and have a long service life.

[0005] To achieve the above objectives, the solution of this utility model is:

[0006] A valve core assembly includes a valve core housing, a mounting base, and a balance plug. The valve core housing includes a cylindrical body and a pressure cap. An inlet channel is formed within the cylindrical body, and several outlets are formed on the side wall of the cylindrical body. A through-hole is formed at the upper end of the cylindrical body corresponding to the inlet channel. The mounting base is disposed above the cylindrical body. The balance plug is installed within the mounting base, with its upper end 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 side wall of the mounting base. The inner side wall of the mounting base is a sloping surface, wider at the top and narrower at the bottom. The side of the balance 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, the sealing surface being located above the water outlet. 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 outlet. A water pressure balancing chamber is formed between the balancing plug and the pressure cap. A balancing kit for connecting and disconnecting the water inlet and the water outlet is installed in the middle of the balancing plug. A guide shaft is provided at the lower end of the pressure cap for the balancing kit to slide up and down along it. A water flow channel is formed between the guide shaft and the balancing kit. Several abutting blocks are provided at the bottom of the pressure cap, abutting against the upper end of the balancing kit.

[0007] 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.

[0008] 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.

[0009] The balancing kit has an internal cavity.

[0010] The bottom of the balancing kit is equipped with a filter screen, which is located at the water passage hole.

[0011] A solenoid valve includes a solenoid valve head and the aforementioned valve core assembly, wherein the solenoid valve head is disposed outside the valve core assembly, and a moving iron core assembly for sealing the water pressure balance chamber is provided inside the solenoid valve head.

[0012] With the above structure, the valve core assembly of this utility model has the following advantages:

[0013] 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.

[0014] 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.

[0015] 3. A balancing assembly for opening and closing the inlet and outlet is installed in the middle of the balancing plug. The balancing assembly slides up and down along the guide shaft. During the process of the inlet and outlet changing from open to closed, due to the water pressure difference, the balancing plug and the balancing assembly are moved downward by the force of the water flow in the water pressure balancing chamber. Also, due to the water pressure in the inlet channel, the balancing assembly is pushed, and the downward movement speed of the balancing plug slows down. The valve core closes slowly, thereby preventing the water hammer effect.

[0016] Therefore, the valve core assembly of this utility model can be assembled into a solenoid valve, which can not only prevent water hammer effect, but also has a long service life. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an electromagnetic valve according to the present invention;

[0018] Figure 2 This is a cross-sectional structural diagram of an electromagnetic valve according to the present invention.

[0019] Figure 3 This is a structural schematic diagram of a valve core assembly according to the present invention.

[0020] In the picture:

[0021] Cylinder 1 Water Inlet Channel 11

[0022] Outlet 12, water passage hole 13

[0023] Mounting column 14, channel 15

[0024] Pressure cap 2 guide shaft 21

[0025] 22 Baffle block 23 Guide hole

[0026] Pressure relief hole 24 Pressure relief water flow channel 25

[0027] Mounting base 3, mounting hole 31

[0028] Water outlet channel 32 balance plug 4

[0029] Water pressure balancing chamber 5 balancing kit 6

[0030] Inner cavity 61, filter screen 7

[0031] Solenoid valve head 1a Moving iron core assembly 2a Detailed Implementation

[0032] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0033] Example 1

[0034] A 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 a plurality of 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] The balancing assembly 6 has an inner cavity 61. The lower end of the pressure cap 2 is provided with a guide shaft 21 that extends into the balancing assembly 6. A water flow channel is formed between the guide shaft 21 and the balancing assembly 6. The balancing assembly 6 can move freely up and down in the water pressure balancing chamber 5 along the guide shaft 21. The inner cavity 61 and the water flow channel enable communication between the water pressure balancing chamber 5 and the water inlet channel 11.

[0040] The bottom of the pressure cap 2 is provided with several abutting blocks 22 that abut against the upper end of the balancing kit 6. This design prevents the water flow channel from being blocked.

[0041] 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. Several outlet channels 32 are opened on the side wall of the mounting base 3, connected to the outlet of the pressure relief water flow channel 25. The outlet channels 32 are connected to the outlet 12 of the cylinder 1, thereby realizing the pressure relief function.

[0042] Example 2

[0043] A type of solenoid valve, such as Figures 1-2 As shown, the device includes a solenoid valve head 1a and the 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 valve core assembly. The solenoid valve head 1a and the 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.

[0044] The working process of this solenoid valve is as follows:

[0045] When the inlet channel 11 and outlet 12 are blocked, the lower end of the balance plug 4 is sealed to the water passage 13. When the moving iron core assembly 2a moves upward to open the pressure relief hole 24 on the pressure relief nozzle, the water in the water pressure balance chamber 5 flows 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 in sequence, and then flows out from the outlet 12 of the cylinder 1. At this time, the water pressure in the 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 and the balance assembly 6 move upward, so that the inlet channel 11 and the outlet 12 are connected, and a large flow of water flows out, increasing the water inlet volume in the water pressure balance chamber 5.

[0046] 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 water flow channel, increasing the water pressure in the water pressure balance chamber 5. 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 is also moved down by the force, sealing the water passage 13 again, and the water flow between the water inlet channel 11 and the water outlet 12 is cut off again.

[0047] From the above structure and working process, it can be seen that the valve core assembly of this utility model has the following advantages:

[0048] 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.

[0049] 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.

[0050] 3. During the process of the water inlet channel 11 and the water outlet 12 changing from being open to being blocked, due to the water pressure difference, the balance plug 4 and the balance kit 6 are subjected to a force and move downward. Also, due to the water pressure in the water inlet channel 11, the balance kit 6 is also pushed, the downward movement speed of the balance plug 4 slows down, and the valve core slowly closes, thereby preventing the generation of water hammer effect.

[0051] 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.

[0052] Therefore, the valve core assembly of this utility model can be assembled into a solenoid valve, which can not only prevent water hammer effect, but also has a long service life.

[0053] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A 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 balancing plug is 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 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 balancing plug near the mounting base is also sloping. The lower end of the balancing plug forms a sealing surface with the water passage. The sealing surface is located above the water outlet. A channel for the balancing plug to deform is formed between the sealing surface and the bottom of the mounting base. 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 connecting and disconnecting the water inlet and the water outlet is installed in the middle of the balancing plug. A guide shaft is provided at the lower end of the pressure cap for the balancing kit to slide up and down. A water flow channel is formed between the guide shaft and the balancing kit. Several abutment blocks are provided at the bottom of the pressure cap that abut against the upper end of the balancing kit.

2. The 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.

3. A valve core assembly according to claim 2, 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.

4. A valve core assembly according to claim 1, characterized in that: The balancing kit has an internal cavity.

5. A 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.

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

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