Solenoid valve capable of effectively preventing foreign matter iron core

Abstract

The electromagnetic valve comprises a valve body, a valve port is formed in the top of the valve body, a sealing support assembly is installed on the inner side of the top of the valve body, a sealing gasket is installed on the top of the sealing support assembly, a static iron core is installed in the middle of the valve body, and the static iron core is installed in the middle of the valve body. A guide hole is formed in the inner side of the static iron core, a mounting groove position is formed in the top of the guide hole, and a filter screen is mounted in the mounting groove position. Liquid entering the valve body can be filtered by arranging the mounting groove position and the filter screen in the guide hole in the static iron core, so that impurities and foreign matters are filtered out; impurities and foreign matters are prevented from entering and being clamped between the movable iron core assembly and the sleeve to cause failure of the electromagnetic valve, the valve rod slidably penetrates through the filter screen to be installed, the valve rod is limited through the movable iron core assembly at the bottom and the filter screen, the shaking range of the valve rod is narrowed, and the valve rod is more stable to use.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valves, in particular to an electromagnetic valve with an iron core that can effectively prevent foreign matter. Background Art

[0002] The solenoid valve is suitable for heat pump air conditioning systems. It is an efficient and energy-saving device that fully utilizes the heat energy in the low-temperature zone. Automobile thermal management includes thermal management of motor and electronic control systems, thermal management of battery systems, and thermal management of passenger compartment air conditioning. The solenoid valve cooperates with related components in the system to switch the valve through the movement of the valve core to control the flow direction of the medium in the pipeline to adjust the needs of various modes.

[0003] However, the solenoid valve currently used in the heat pump air conditioning system is easily caught by foreign objects between the moving iron core and the sleeve during use, causing the solenoid valve to fail. In addition, when the solenoid valve core moves, the gap between the valve stem and the static iron core is too large, and the valve stem is not centered, causing the solenoid valve to fail. Utility Model Content

[0004] The utility model provides a solenoid valve with an iron core that is effectively protected from foreign objects, which can effectively solve the problem mentioned in the above background technology that the solenoid valve currently used in the heat pump air-conditioning system is easily clamped by foreign objects between the moving iron core and the sleeve during use, causing the solenoid valve to fail, and when the solenoid valve core moves, the gap between the valve stem and the static iron core is too large, and the valve stem is not centered, causing the solenoid valve to fail.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electromagnetic valve with an effective foreign body iron core prevention, comprising a valve body, a valve port is opened at the top of the valve body, a sealing bracket assembly is installed on the inner side of the top of the valve body, a sealing gasket is installed on the top of the sealing bracket assembly, a sealing bracket piston ring is installed on the bottom of the sealing bracket assembly, a valve body upper cover assembly is installed on the inner side of the top of the valve body, and a static iron core assembly is installed at the middle position of the valve body;

[0006] The static iron core assembly includes a static iron core, a guide hole, a mounting slot and a filter screen;

[0007] A static iron core is installed in the middle of the valve body, a guide hole is opened inside the static iron core, a mounting slot is opened at the top of the guide hole, and a filter is installed inside the mounting slot;

[0008] A valve stem is clamped inside the static iron core, a coil assembly is arranged on the outer side of the middle part of the valve body, a moving iron core assembly is installed on the bottom of the valve stem, a sleeve is installed on the bottom of the valve body, a buffer pad is installed on the inside of the sleeve, a sealing head is installed on the top of the static iron core corresponding to the top end of the valve stem, and a sub-valve body is installed between the sealing bracket assembly and the valve body upper cover assembly.

[0009] Preferably, the filter screen is interference-fitted in the installation slot, the filter screen is made of copper, and the valve stem slides through the middle of the filter screen.

[0010] Preferably, the outer side of the sealing head is made of stainless steel, and the inside of the sealing head is made of rubber.

[0011] Preferably, a sealing hole is opened at the bottom of the sealing bracket assembly at a position corresponding to the sealing head, and the sealing head contacts and seals with the sealing hole on the sealing bracket assembly.

[0012] Preferably, the buffer pad is made of rubber, and the buffer pad is in contact with the bottom position of the moving iron core assembly.

[0013] Preferably, the bottom of the static iron core is clamped with the top of the sleeve, and the moving iron core assembly is located on the inner side of the sleeve.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the utility model has a scientific and reasonable structure and is safe and convenient to use:

[0015] 1. By setting an installation groove and a filter screen inside the guide hole inside the static iron core, the liquid entering the valve body can be filtered, thereby filtering out impurities and foreign matter, preventing impurities and foreign matter from entering and being sandwiched between the moving iron core assembly and the sleeve, causing the solenoid valve to fail. The valve stem slides through the filter screen for installation, and the valve stem is limited by the moving iron core assembly and the filter screen at the bottom, so that the shaking range of the valve stem is reduced, making the valve stem more stable to use.

[0016] 2. By setting a sealing head at the top of the valve stem, the sealing hole on the sealing bracket assembly is contact-sealed, and the bottom of the moving iron core assembly is buffered by a rubber buffer pad, which effectively reduces the impact noise generated when the moving iron core assembly returns, can reduce the use damage of the solenoid valve, and increase the service life of the solenoid valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0018] In the attached picture:

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 It is a cross-sectional view of the valve body of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the static iron core of the utility model;

[0022] Figure 4 This utility model Figure 3 Schematic diagram of the enlarged structure of the A area in the middle;

[0023] Numbers in the figure: 1, valve body; 2, valve port; 3, sealing gasket; 4, sealing bracket assembly; 5, sealing bracket piston ring; 6, valve body upper cover assembly;

[0024] 7. Static iron core assembly; 701. Static iron core; 702. Guide hole; 703. Mounting slot; 704. Filter;

[0025] 8. Valve stem; 9. Coil assembly; 10. Moving iron core assembly; 11. Sleeve; 12. Buffer pad; 13. Sealing head; 14. Sub-valve body. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0027] Example: Figure 1-4 As shown, the utility model provides a technical solution, a solenoid valve with an effective foreign body iron core prevention, comprising a valve body 1, a valve port 2 is opened at the top of the valve body 1, a sealing bracket assembly 4 is installed on the inner side of the top of the valve body 1, a sealing gasket 3 is installed on the top of the sealing bracket assembly 4, a sealing bracket piston ring 5 is installed on the bottom of the sealing bracket assembly 4, a valve body upper cover assembly 6 is installed on the inner side of the top of the valve body 1, and a static iron core assembly 7 is installed at the middle position of the valve body 1;

[0028] The static iron core assembly 7 includes a static iron core 701, a guide hole 702, a mounting slot 703 and a filter screen 704;

[0029] A static iron core 701 is installed in the middle of the valve body 1, a guide hole 702 is opened inside the static iron core 701, a mounting slot 703 is opened at the top of the guide hole 702, and a filter screen 704 is installed inside the mounting slot 703;

[0030] The valve stem 8 is clamped inside the static iron core 701, and the filter screen 704 is installed in the installation groove 703 with interference fit. The filter screen 704 is made of copper. The valve stem 8 slides through the middle of the filter screen 704 to limit the valve stem 8 and reduce the shaking of the valve stem 8. The sealing head 13 on the valve stem 8 can better seal. The coil assembly 9 is arranged on the outer side of the middle part of the valve body 1, and the moving iron core assembly 10 is installed at the bottom of the valve stem 8. The sleeve 11 is installed at the bottom of the valve body 1. The bottom of the static iron core 701 is clamped with the top of the sleeve 11, and the moving iron core assembly 10 is located on the inner side of the sleeve 11, which is convenient for limiting the static iron core assembly 7 and the moving iron core assembly 10 to reduce the shaking range during operation. The buffer pad 12 is made of rubber and contacts the bottom position of the moving iron core assembly 10, which effectively reduces the impact noise generated when the moving iron core assembly 10 returns to its original position. A sealing head 13 is installed at the top of the static iron core 701 corresponding to the top position of the valve stem 8. The outer side of the sealing head 13 is made of stainless steel, and the inside of the sealing head 13 is made of rubber, which reduces the deformation problem and uneven force problem of the sealing head 13. A sealing hole is opened at the bottom of the sealing bracket assembly 4 corresponding to the position of the sealing head 13. The sealing head 13 contacts and seals with the sealing hole on the sealing bracket assembly 4, which assists the connection between the sealing bracket assembly 4 and the sealing head 13. A sub-valve body 14 is installed between the sealing bracket assembly 4 and the valve body upper cover assembly 6.

[0031] Working principle and use process of the utility model: during the use of the solenoid valve, after the liquid enters the guide hole 702 inside the solenoid valve, it will pass through the filter screen 704, thereby filtering out impurities and foreign objects, thereby preventing impurities and foreign objects from entering, reducing the impact on the operation of the solenoid valve, and eliminating the risk of failure of the solenoid valve due to impurities and foreign objects;

[0032] The sleeve 11 is placed outside the static iron core assembly 7 and the moving iron core assembly 10, which can limit the position of the static iron core assembly 7 and the moving iron core assembly 10. At the same time, the valve stem 8 is limited by the copper filter 704. When the valve stem 8 moves up and down, the range of left and right shaking is reduced to ensure the stability of the valve stem 8.

[0033] When the valve stem 8 moves upward, the sealing head 13 is pushed to accurately block the sealing hole to ensure that the solenoid valve can work normally. A buffer pad 12 is arranged inside the sleeve 11 to reduce the noise generated by the impact of the moving iron core assembly 10 when the valve stem 8 and the moving iron core assembly 10 move downward.

[0034] Finally, it should be noted that the above description is only a preferred example of the present utility model and is not intended to limit the present utility model. Although the present utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A solenoid valve with an effective foreign body-proof iron core, comprising a valve body (1), characterized in that: The valve body (1) is provided with a valve port (2) at the top, a sealing bracket assembly (4) is installed on the inner side of the top of the valve body (1), a sealing gasket (3) is installed on the top of the sealing bracket assembly (4), a sealing bracket piston ring (5) is installed on the bottom of the sealing bracket assembly (4), a valve body upper cover assembly (6) is installed on the inner side of the top of the valve body (1), and a static iron core assembly (7) is installed in the middle of the valve body (1); The static iron core assembly (7) comprises a static iron core (701), a guide hole (702), a mounting slot (703) and a filter screen (704); A static iron core (701) is installed in the middle of the valve body (1), a guide hole (702) is provided inside the static iron core (701), a mounting groove (703) is provided at the top of the guide hole (702), and a filter screen (704) is installed inside the mounting groove (703); A valve stem (8) is clamped inside the static iron core (701), a coil assembly (9) is arranged on the outer side of the middle part of the valve body (1), a moving iron core assembly (10) is installed at the bottom of the valve stem (8), a sleeve (11) is installed at the bottom of the valve body (1), a buffer pad (12) is installed on the inner side of the sleeve (11), a sealing head (13) is installed at the top of the static iron core (701) corresponding to the top end of the valve stem (8), and a sub-valve body (14) is installed between the sealing bracket assembly (4) and the valve body upper cover assembly (6).

2. The solenoid valve with an effective foreign body-proof iron core according to claim 1, characterized in that: The filter screen (704) is interference-fittedly installed in the installation slot (703); the filter screen (704) is made of copper; and the valve stem (8) slides through the middle of the filter screen (704).

3. The solenoid valve with an effective foreign body-proof iron core according to claim 1, characterized in that: The outer side surface of the sealing head (13) is made of stainless steel, and the interior of the sealing head (13) is made of rubber.

4. The solenoid valve with an effective foreign body-proof iron core according to claim 1, characterized in that: A sealing hole is provided at the bottom of the sealing bracket assembly (4) at a position corresponding to the sealing head (13), and the sealing head (13) contacts and seals with the sealing hole on the sealing bracket assembly (4).

5. The solenoid valve with an effective foreign body-proof iron core according to claim 1, characterized in that: The buffer pad (12) is made of rubber material, and the buffer pad (12) is in contact with the bottom of the moving iron core assembly (10).

6. The solenoid valve with an effective foreign body-proof iron core according to claim 1, characterized in that: The bottom of the static iron core (701) is clamped with the top of the sleeve (11), and the moving iron core assembly (10) is located on the inner side of the sleeve (11).

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