Electromagnetic valve for balancing pressure difference

Abstract

The utility model discloses an electromagnetic valve assembly capable of balancing differential pressure, which comprises a shell assembly, a pressure sensor, a pressure sensor, a pressure sensor, a pressure sensor and a pressure sensor, and is characterized in that the shell assembly is provided with a sealed accommodating cavity; the accommodating cavity is provided with a sleeve, a static iron core and a coil assembly; the lower end of the sleeve is connected to the static iron core, a movable iron core is arranged in the sleeve, the coil assembly is arranged on the outer side of the sleeve and used for driving the movable iron core to move up and down, and the movable iron core is connected with a valve element. The shell assembly is provided with an air hole, and the air hole enables the containing cavity to be communicated with the outside and is used for balancing the air pressure difference between the containing cavity and the outside. The utility model relates to the technical field of electromagnetic valves.

Description

Technical Field

[0001] The utility model relates to the technical field of solenoid valves, and more specifically to a solenoid valve for balancing differential pressure. Background Art

[0002] The solenoid valve is one of the essential components of automotive products, and its main function is to realize the on-off function of pipelines. The existing solenoid valves generally have a housing with a sealed accommodation cavity inside. The moving iron core, sleeve, static iron core, coil assembly, etc. are arranged in the accommodation cavity. The moving iron core is connected to the valve core, and when the moving iron core moves, it drives the valve core to cooperate with the working port of the valve seat.

[0003] Since the driving areas of automobiles are very extensive and there are certain differences in ambient air pressures in different areas (for example: the ambient air pressure is relatively high in some areas and relatively low in some areas), when the above-mentioned components of the automobile are used in these areas, there is an air pressure difference between the accommodation cavity of the solenoid valve and the external environment, which easily causes the components to be under pressure and leads to deformation or loosening, and the reliability is relatively low. Content of the Utility Model

[0004] In view of the deficiencies and defects of the prior art, a solenoid valve assembly capable of balancing differential pressure is provided.

[0005] A solenoid valve for balancing differential pressure, comprising:

[0006] A housing assembly provided with a sealed accommodation cavity;

[0007] The accommodation cavity is provided with a sleeve, a static iron core, and a coil assembly;

[0008] The lower end of the sleeve is connected to the static iron core. A moving iron core is arranged inside the sleeve. The coil assembly is arranged outside the sleeve. The moving iron core is connected to a valve core;

[0009] The housing assembly is provided with a vent hole, which communicates the accommodation cavity with the outside world for balancing the air pressure difference between the accommodation cavity and the outside world.

[0010] After adopting the above structure, the solenoid valve for balancing differential pressure of the utility model has the following advantages compared with the prior art: a vent hole is arranged on the housing assembly for communicating the accommodation cavity with the outside world. The vent hole can balance the air pressure difference between the accommodation cavity and the outside world, avoiding the risk of deformation or loosening caused by the internal and external air pressure difference on the components; making the device operate reliably.

[0011] As an improvement of the utility model, the housing assembly includes a housing and an end cover. The housing is of a cylindrical structure, and the upper and lower ends of the housing are respectively provided with openings.

[0012] The end cover is arranged at the upper end of the outer shell, and the end cover is provided with a connecting part extending into the opening connecting part at the upper end of the outer shell. A seal is formed between the connecting part and the inner wall of the outer shell through a sealing ring.

[0013] The static iron core is connected in the lower end opening of the outer shell, and a seal is formed between the static iron core and the inner wall of the outer shell through a sealing ring;

[0014] The accommodation cavity is formed between the static iron core and the end cover.

[0015] As an improvement of the present invention, a conductive part is embedded in the end cover, and one end of the conductive part penetrates into the accommodation cavity and is electrically connected to the coil assembly;

[0016] The end cover is provided with an extended insertion part for the wiring terminal to be inserted. An assembly space is arranged inside the insertion part, and the other end of the conductive part extends into the assembly space;

[0017] The vent hole is arranged on the bottom wall of the assembly space.

[0018] As an improvement of the present invention, the coil assembly includes a bracket and a coil wound around the bracket. The bracket is arranged between the end cover and the static iron core,

[0019] The bracket is provided with an inner hole for the sleeve to penetrate into, and gaps communicating with each other are formed between the inner hole and the sleeve, between the lower part of the bracket and the upper end surface of the static iron core, between the upper part of the bracket and the end cover, and between the outer side of the bracket and the inner wall of the outer shell. Description of the Drawings

[0020] Figure 1 is a schematic half-sectional structure diagram of the present invention.

[0021] Figure 2 is the Figure 1 enlarged schematic diagram of the structure at A in the present invention.

[0022] Figure 3 is the Figure 1 schematic diagram of the structure of the components of the present invention in the exploded state.

[0023] Figure 4 is the schematic diagram of the end cover structure of the present invention.

[0024] Figure 5 is the schematic half-sectional diagram of the end cover of the present invention.

[0025] As shown in the figure: 1. Housing assembly; 1.1. Accommodating cavity; 1.2. Outer shell; 1.3. End cover; 1.31. Connecting part; 1.32. Insertion part; 1.321. Assembly space; 2. Sleeve; 2.1. Moving iron core; 2.11. Valve core; 3. Static iron core; 4. Coil assembly; 4.1. Bracket; 4.11. Inner hole; 4.12. Protrusion; 4.2. Coil; 5. Vent hole; 6. Sealing ring; 7. Conductive part; 9. Gap; 10. Valve seat; 10.1. Working port. Detailed implementation manners

[0026] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] Please refer to Figures 1-5 As shown, a solenoid valve for balancing differential pressure includes:

[0028] A housing assembly 1, and the housing assembly 1 is provided with a sealed accommodating cavity 1.1;

[0029] The accommodating cavity 1.1 is provided with a sleeve 2, a static iron core 3, and a coil assembly 4;

[0030] The lower end of the sleeve 2 is connected to the static iron core 3, a moving iron core 2.1 is arranged inside the sleeve 2, the coil assembly 4 is arranged outside the sleeve 2, and the moving iron core 2.1 is connected with a valve core 2.11;

[0031] The housing assembly 1 is provided with a vent hole 5, and the vent hole 5 communicates the accommodating cavity 1.1 with the outside, and is used for balancing the air pressure difference between the accommodating cavity 1.1 and the outside.

[0032] A vent hole 5 is arranged on the housing assembly 1 for communicating the accommodating cavity 1.1 with the outside. The vent hole 5 can balance the air pressure difference between the accommodating cavity 1.1 and the outside, avoid the risk of deformation or loosening caused by the pressure on the components due to the internal and external air pressure difference, and make the device operate reliably.

[0033] Please refer to Figures 1-2 As shown, the housing assembly 1 includes an outer shell 1.2 and an end cover 1.3. The outer shell 1.2 is of a cylindrical structure, and the upper and lower ends of the outer shell 1.2 are respectively provided with openings.

[0034] The end cover 1.3 is arranged at the upper end of the outer shell 1.2, and the end cover 1.3 is provided with a connecting part 1.31 extending into the upper opening of the outer shell 1.2. A seal is formed between the connecting part 1.31 and the inner wall of the outer shell 1.2 through a sealing ring 6.

[0035] The static iron core 3 is connected in the lower opening of the outer shell 1.2, and a seal is formed between the static iron core 3 and the inner wall of the outer shell 1.2 through a sealing ring 6;

[0036] An accommodating cavity 1.1 is formed between the static iron core 3 and the end cover 1.3.

[0037] The valve core 2.11 is provided with a push rod that passes through the static iron core 3 and abuts against the bottom of the moving iron core 2.1. The valve seat 10 is located at the bottom of the static iron core 3, and the working port on the valve seat 10 is arranged opposite to the valve core 2.11.

[0038] When the coil assembly 4 is energized, the moving iron core 2.1 moves downward to cooperate with the static iron core 3, and synchronously drives the valve core 2.11 to seal the working port.

[0039] The valve core 2.11 is connected with a spring, and the spring is pre-tightened when the valve core 2.11 moves downward. When the coil assembly 4 is de-energized, the spring drives the valve core 2.11 to move upward and reset, opening the working port.

[0040] The outer shell 1.2 has a cylindrical structure and is hollow inside. After the connecting part 1.31 and the static iron core 3 are inserted into the outer shell 1.2, the sealing ring 6 between the connecting part 1.31 and the static iron core 3 and the inner wall of the outer shell 1.2 plays a sealing role, and a relatively sealed accommodation cavity 1.1 can be formed to accommodate the easily damaged parts to avoid damage and extend the service life; the structure uses fewer components, has a high degree of compactness, and relatively low cost.

[0041] Please refer to Figures 3-5 As shown, a conductive part 7 is embedded in the end cover 1.3, and one end of the conductive part 7 penetrates into the accommodation cavity 1.1 and is electrically connected to the coil assembly 4.

[0042] The end cover 1.3 is provided with an extended plug-in part 1.32 for plugging in the wiring terminal. An assembly space 1.321 is arranged inside the plug-in part 1.32, and the other end of the conductive part 7 extends into the assembly space 1.321.

[0043] The vent hole 5 is arranged on the bottom wall of the assembly space 1.321.

[0044] The conductive part 7 is embedded in the end cover 1.3, one end extends into the accommodation cavity 1.1 and is electrically connected to the coil assembly 4, and the other end extends into the assembly space 1.321 of the plug-in part 1.32. The plug-in part 1.32 is for plugging in the external terminal, and after plugging, an electrical connection can be formed with the coil assembly 4 through the conductive part 7. After the above improvement, the exposure of the conductive part 7 is reduced, the reliability of the device operation is improved, and it has the characteristic of high compactness.

[0045] The ventilation holes 5 are provided through the bottom wall of the assembly space 1.321. The side wall of the insertion part 1.32 functions to block foreign matters from entering the periphery of the ventilation holes 5, effectively reducing the entry of foreign matters into the ventilation holes 5. After the insertion part 1.32 is connected to the terminal (usually the terminal has an insertion body that can penetrate into the assembly space 1.321), the remaining gap 9 in the assembly space 1.321 is reduced, further reducing the entry of foreign matters into the ventilation holes 5. At the same time, the ventilation holes 5 can also communicate the accommodation cavity 1.1 with the external environment, playing a role in balancing the pressure difference. The device operates reliably and has a long service life.

[0046] Please refer to Figures 1-3 As shown, the coil assembly 4 includes a bracket 4.1 and a coil 4.2 wound around the bracket 4.1. The bracket 4.1 is arranged between the end cover 1.3 and the static iron core 3.

[0047] The bracket 4.1 is provided with an inner hole 4.11 for the sleeve 2 to penetrate. And an interconnected gap 9 is formed between the inner hole 4.11 and the sleeve 2, between the lower part of the bracket 4.1 and the upper end face of the static iron core 3, between the upper part of the bracket 4.1 and the end cover 1.3, and between the outer side of the bracket 4.1 and the inner wall of the housing 1.2.

[0048] The upper end of the bracket 4.1 is connected to the buckle point at the lower part of the end cover 1.3 through an elastic buckle. The lower part of the bracket 4.1 is provided with a plurality of bumps 4.12, and the bumps 4.12 support the upper end face of the static iron core 3, so that a gap 9 is formed between the lower end face of the bracket 4.1 and the upper end face of the static iron core 3.

[0049] A stop block is also arranged between the end cover 1.3 and the upper end face of the bracket 4.1. The above structure can limit the bracket 4.1 up and down, and the upper and lower ends of the bracket 4.1 are respectively supported inside the housing 1.2, so that the bracket 4.1 can be laterally limited.

[0050] The wiring end of the coil 4.2 leaks out from the upper end of the bracket 4.1 for connection by the conductive part 7.

[0051] An interconnected gap 9 is formed between the inner hole 4.11 and the sleeve 2, between the lower part of the bracket 4.1 and the upper end face of the static iron core 3, between the upper part of the bracket 4.1 and the end cover 1.3, and between the outer side of the bracket 4.1 and the inner wall of the housing 1.2. The air pressure in each gap 9 is the same as that in the accommodation cavity 1.1, avoiding the risk of deformation or loosening of components caused by the air pressure difference in the partitioned cavity, and making the device operate reliably.

[0052] The above is only the preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions falling within the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. A solenoid valve for balancing pressure difference, characterized in that: include: A housing assembly (1), wherein the housing assembly (1) is provided with a sealed accommodating cavity (1.1); The accommodating chamber (1.1) is provided with a sleeve (2), a static iron core (3), and a coil assembly (4); The lower end of the sleeve (2) is connected to the static iron core (3), a moving iron core (2.1) is arranged inside the sleeve (2), the coil assembly (4) is arranged outside the sleeve (2), and the moving iron core (2.1) is connected to a valve core (2.11); The housing assembly (1) is provided with an air vent (5), which connects the accommodating chamber (1.1) with the outside world and is used to balance the air pressure difference between the accommodating chamber (1.1) and the outside world.

2. A solenoid valve for balancing pressure difference according to claim 1, characterized in that: The housing assembly (1) comprises an outer shell (1.2) and an end cover (1.3); the outer shell (1.2) is a cylindrical structure; the upper and lower ends of the outer shell (1.2) are respectively opened. The end cover (1.3) is arranged at the upper end of the outer shell (1.2), and the end cover (1.3) is provided with a connecting portion (1.31) extending into the upper end opening of the outer shell (1.2), and a seal is formed between the connecting portion (1.31) and the inner wall of the outer shell (1.2) via a sealing ring (6). The static iron core (3) is connected to the lower opening of the outer shell (1.2), and a seal is formed between the static iron core (3) and the inner wall of the outer shell (1.2) via a sealing ring (6); The accommodating cavity (1.1) is formed between the static iron core (3) and the end cover (1.3).

3. A solenoid valve for balancing pressure difference according to claim 2, characterized in that: A conductive member (7) is embedded in the end cover (1.3), and one end of the conductive member (7) penetrates into the accommodating cavity (1.1) and is electrically connected to the coil assembly (4); The end cover (1.3) is provided with an extended plug-in portion (1.32), the plug-in portion (1.32) is for plugging the connection terminal, an assembly space (1.321) is provided inside the plug-in portion (1.32), and the other end of the conductive member (7) extends into the assembly space (1.321); The vent hole (5) is arranged on the bottom wall of the assembly space (1.321).

4. A solenoid valve for balancing pressure difference according to claim 2, characterized in that: The coil assembly (4) comprises a bracket (4.1) and a coil (4.2) wound on the bracket (4.1); the bracket (4.1) is arranged between the end cover (1.3) and the static iron core (3). The bracket (4.1) is provided with an inner hole (4.11) for the sleeve (2) to penetrate, and interconnected gaps (9) are formed between the inner hole (4.11) and the sleeve (2), between the lower part of the bracket (4.1) and the upper end surface of the static iron core (3), between the upper part of the bracket (4.1) and the end cover (1.3), and between the outer side of the bracket (4.1) and the inner wall of the outer shell (1.2).

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