Integrated sealing element and automatic water drain valve of fuel filter

Abstract

The utility model provides an integrated sealing element and an automatic water drain valve of a fuel filter, and belongs to the technical field of fuel filters. As the lower part of the framework is fixedly connected with the movable iron core, the rubber coating is connected with the air hole compression ring in an embedded manner. When the coil is not electrified, the movable iron core is under the action of self gravity, the bottom of the third wrapping part of the rubber coating is attached to the top end of the water outlet in a sealed mode, the bottom of the second wrapping part is attached to the top end of the air inlet in a sealed mode, and at the moment, a non-water-discharging state is achieved; when the coil is electrified, the movable iron core is under the electromagnetic action, the bottom of the third wrapping part is far away from the top end of the water outlet, a gap is formed between the third wrapping part and the water outlet, the bottom of the second wrapping part is far away from the top end of the air inlet, a gap is formed between the rubber-coated bottom surface of the second wrapping part and the air inlet, and at the moment, a water drainage state is achieved. Due to the fact that the rubber coating integrated design replaces two sealing rings in the prior art, the technical problems that in the prior art, the installation process of the sealing rings is tedious, and cost is high are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automotive parts, and particularly relates to an integrated seal and an automatic drain valve for a fuel filter. Background Art

[0002] The patent with the publication number of EP1521910B1 in the prior art discloses "Improvements in and relating to solenoid fuel drain valves". Among them, the air inlet and the drain port are respectively blocked by two sealing rings. The first sealing ring and the second sealing ring are respectively connected to the skeleton. In actual use, the second sealing ring blocking the air inlet is prone to separate from the skeleton, and due to the split design of the two sealing rings, the installation process of the sealing rings is cumbersome and the cost is relatively high. Summary of the Utility Model

[0003] The embodiments of the utility model provide an integrated seal and an automatic drain valve for a fuel filter, aiming to solve the technical problems of cumbersome installation process and high cost of the sealing rings in the prior art.

[0004] To achieve the above object, the technical solution adopted by the utility model is as follows:

[0005] In the first aspect, an integrated seal is provided, which includes a skeleton, an air hole pressing ring and a rubber coating. The skeleton is provided with a limiting part; the lower part of the skeleton is fixedly connected to the moving iron core; the air hole pressing ring is sleeved on the skeleton, and the bottom end of the air hole pressing ring is connected to the top of the limiting part; the rubber coating is sleeved on the limiting part, the rubber coating is arranged below the air hole pressing ring, and the rubber coating is embedded and connected with the air hole pressing ring.

[0006] In a possible implementation manner, the air hole pressing ring includes a first annular part, a second annular part and a third annular part. The first annular part is sleeved on the skeleton, and the bottom of the first annular part is connected to the top of the limiting part; the second annular part is fixedly arranged above the first annular part, the inner diameter of the second annular part is smaller than the inner diameter of the first annular part, and the outer diameter of the second annular part is larger than the outer diameter of the first annular part; the third annular part is fixedly arranged above the second annular part, the inner diameter of the third annular part is larger than the inner diameter of the second annular part, and the outer diameter of the third annular part is smaller than the outer diameter of the second annular part.

[0007] In a possible implementation manner, the first annular part is of a stepped structure.

[0008] In a possible implementation, the overmolding includes a first wrapping portion, a second wrapping portion, and a third wrapping portion. The first wrapping portion is sleeved on the second annular portion; the outer diameter of the second wrapping portion is smaller than that of the first wrapping portion, the second wrapping portion is sleeved on the second annular portion, and the second wrapping portion is embedded and connected with the second annular portion; the outer diameter of the third wrapping portion is smaller than that of the second wrapping portion, and the third wrapping portion is sleeved on the limiting portion.

[0009] In a possible implementation, the third wrapping portion further includes a vertical portion and an embedding portion. The top of the vertical portion is connected to the bottom of the second wrapping portion, and the vertical portion is sleeved on the outer peripheral side of the limiting portion; the embedding portion is fixedly arranged below the vertical portion, and the inner diameter of the embedding portion is smaller than that of the vertical portion.

[0010] In a possible implementation, an annular groove is arranged on the inner side of the embedding portion.

[0011] In a possible implementation, the outer peripheral side of the second annular portion is an inclined surface.

[0012] In a possible implementation, the integral seal further includes a snap ring, the snap ring is arranged at the bottom of the skeleton, and the snap ring is used to support the moving iron core.

[0013] In a second aspect, the present utility model provides a fuel filter automatic drain valve, including the integral seal described in the above embodiment.

[0014] In the embodiments of the present application, compared with the prior art, there are the integral seal and the fuel filter automatic drain valve. Since the lower part of the skeleton is fixedly connected with the moving iron core, and the overmolding is embedded and connected with the air hole pressing ring. When the coil is not powered on, under the action of its own gravity, the bottom of the third wrapping portion of the overmolding fits and seals with the top of the drain port, and the bottom of the second wrapping portion fits and seals with the top of the air inlet. At this time, it is in the non-draining state; when the coil is powered on, under the electromagnetic action, the bottom of the third wrapping portion moves away from the top of the drain port, a gap is formed between the third wrapping portion and the drain port, and at the same time, the bottom of the second wrapping portion moves away from the top of the air inlet, and a gap is formed between the bottom surface of the overmolding of the second wrapping portion and the air inlet hole. At this time, it is in the draining state. Since the overmolding integral design replaces the two sealing rings in the prior art, the technical problems of cumbersome installation process and high cost in the prior art are solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the connection structure of the fuel filter automatic drain valve and the integral seal provided by the embodiment of the present utility model;

[0016] Figure 2 It is a cross-sectional view of the structure of the integral seal provided by the embodiment of the present utility model;

[0017] Description of the reference numerals in the drawings:

[0018] 1. Skeleton; 10. Drain port; 20. Air inlet; 11. Limiting part; 12. Locking part; 2. Air hole pressing ring; 21. First annular part; 22. Second annular part; 23. Third annular part; 3. Rubber coating; 31. First wrapping part; 32. Second wrapping part; 33. Third wrapping part; 331. Vertical part; 332. Embedded part; 333. Annular groove; 4. Moving iron core; 5. Snap ring. Detailed implementation manners

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] It should be further noted that the drawings and embodiments of the present invention mainly describe and explain the concept of the present invention. On the basis of this concept, the specific forms and settings of some connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be completely described. However, on the premise that those skilled in the art understand the concept of the present invention, those skilled in the art can implement the above specific forms and settings in a well-known manner.

[0021] When an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0022] The orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0023] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more, and the meaning of "several" is one or more, unless otherwise specifically defined.

[0024] Please refer to Figure 1 and Figure 2 simultaneously. Now, the integrated seal and the automatic drain valve for the fuel filter provided by the present utility model will be described.

[0025] The integrated seal includes a skeleton 1, a vent pressure ring 2, and a rubber coating 3. The skeleton 1 is provided with a limiting portion 11; the lower part of the skeleton 1 is fixedly connected to the moving iron core 4; the vent pressure ring 2 is sleeved on the skeleton 1, and the bottom end of the vent pressure ring 2 is connected to the top of the limiting portion 11; the rubber coating 3 is sleeved on the limiting portion 11, the rubber coating 3 is arranged below the vent pressure ring 2, and the rubber coating 3 is embedded and connected with the vent pressure ring 2.

[0026] Among them, the bottom surface of the rubber coating 3 is used for making surface contact with the air inlet joint surface of the bobbin to control the opening or closing of the air inlet.

[0027] In the embodiment of the present application, compared with the prior art, the lower part of the skeleton 1 is fixedly connected to the moving iron core 4. When the coil is not powered on, due to the fixed connection between the lower part of the skeleton 1 and the moving iron core 4, under the action of its own gravity, the moving iron core 4 makes the rubber coating 3 fit and seal with the top ends of the drain port 10 and the air inlet 20. At this time, it is in the state of not draining water; when the coil is powered on, under the electromagnetic action, the moving iron core 4 moves upward. At the same time, due to the fixed connection between the lower part of the skeleton 1 and the moving iron core 4, the moving iron core 4 drives the bottom surface of the rubber coating 3 away from the drain port 10 and the air inlet 20, and gaps are formed between the rubber coating 3 and the drain port 10 and the air inlet 20 respectively. At this time, it is in the state of draining water. Since the integrated design of the rubber coating 3 replaces the two sealing rings in the prior art, the technical problems of the complicated installation process and high cost of the sealing rings in the prior art are solved.

[0028] Furthermore, the skeleton 1 and the vent pressure ring 2 are processed and formed by an integrated injection molding process.

[0029] Specifically, the vent pressure ring 2 includes a first annular portion 21, a second annular portion 22, and a third annular portion 23. The first annular portion 21 is sleeved on the skeleton 1, and the bottom of the first annular portion 21 is connected to the top of the limiting portion 11; the second annular portion 22 is fixedly arranged above the first annular portion 21, the inner diameter of the second annular portion 22 is smaller than the inner diameter of the first annular portion 21, and the outer diameter of the second annular portion 22 is larger than the outer diameter of the first annular portion 21; the third annular portion 23 is fixedly arranged above the second annular portion 22, the inner diameter of the third annular portion 23 is larger than the inner diameter of the second annular portion 22, and the outer diameter of the third annular portion 23 is smaller than the outer diameter of the second annular portion 22.

[0030] The arrangements of the first annular portion 21, the second annular portion 22, and the third annular portion 23 can make the connection between the vent pressure ring 2 and the skeleton 1 more firm, and avoid the separation of the vent pressure ring 2 and the skeleton 1 during long-term use.

[0031] Further, the first annular portion 21 has a stepped structure, which reduces its own weight while maintaining strength and alleviates the resistance of the moving iron core 4 sliding up and down.

[0032] In other embodiments, the rubber coating 3 includes a first wrapping portion 31, a second wrapping portion 32, and a third wrapping portion 33. The first wrapping portion 31 is sleeved on the second annular portion 22; the outer diameter of the second wrapping portion 32 is smaller than that of the first wrapping portion 31. The second wrapping portion 32 is sleeved on the second annular portion 22, and the second wrapping portion 32 is embedded and connected to the second annular portion 22; the outer diameter of the third wrapping portion 33 is smaller than that of the second wrapping portion 32, and the third wrapping portion 33 is sleeved on the limiting portion 11. Wherein, the bottom surface of the second wrapping portion 32 is used to control the opening or closing of the air inlet 20.

[0033] The embedded connection between the first wrapping portion 31 and the second annular portion 22 can further prevent the first wrapping portion 31 from detaching from the second annular portion 22. Moreover, the settings of the first wrapping portion 31, the second wrapping portion 32, and the third wrapping portion 33 not only make the rubber coating 3 more firmly connected to the skeleton 1, preventing the rubber coating 3 from detaching from the skeleton 1 and the gas pressure ring during long-term use, but also improve the sealing performance between the rubber coating 3 and the air inlet 20.

[0034] Further, the third wrapping portion 33 further includes a vertical portion 331 and an embedded portion 332. The top of the vertical portion 331 is connected to the bottom of the second wrapping portion 32, and the vertical portion 331 is sleeved on the outer peripheral side of the limiting portion 11; the embedded portion 332 is fixedly arranged below the vertical portion 331, and the inner diameter of the embedded portion 332 is smaller than that of the vertical portion 331. The bottom of the embedded portion 332 is arranged above the drain port 10, and the embedded portion 332 is used to control the opening or closing of the drain port 10.

[0035] The setting of the embedded portion 332 increases the connection strength with the skeleton 1.

[0036] Further, an annular groove 333 is provided inside the embedded portion 332, and an annular boss adapted to the annular groove 333 is provided on the skeleton 1 to further limit the embedded portion 332.

[0037] In other embodiments, the outer peripheral side of the second annular portion 22 is an inclined surface. Since the second wrapping portion 32 is sleeved on the second annular portion 22 and the second wrapping portion 32 is embedded and connected to the second annular portion 22, when the outer peripheral side of the second annular portion 22 is an inclined surface, the contact area between the second wrapping portion 32 and the second annular portion 22 is increased.

[0038] On the basis of the above embodiments, the integrated seal further includes a snap ring 5, the snap ring 5 is arranged at the bottom of the skeleton 1, and the snap ring 5 is used to support the moving iron core 4. When the moving iron core 4 is sleeved on the bottom of the skeleton 1, the snap ring 5 is snap-connected with the skeleton 1, so as to support the moving iron core 4 and prevent the moving iron core 4 from falling off.

[0039] Furthermore, a locking portion 12 is further arranged on the skeleton 1. The locking portion 12 is arranged between the snap ring 5 and the limiting portion 11. The locking portion 12 is connected to the upper part of the moving iron core 4 and is used to limit the moving iron core 4. Under the combined action of the snap ring 5 and the locking portion 12, the moving iron core 4 is fixedly connected to the skeleton 1.

[0040] In a second aspect, the present utility model provides an automatic drain valve for a fuel filter, which includes the integrated seal described in the above embodiments.

[0041] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An integrated seal, characterized in that: include: The frame (1) is provided with a limiting portion (11), and the lower portion of the frame (1) is fixedly connected to the moving iron core (4); A pore pressure ring (2) is sleeved on the frame (1), and the bottom end of the pore pressure ring (2) is connected to the top of the limiting portion (11); The rubber bag (3) is sleeved on the limiting portion (11), the rubber bag (3) is arranged below the pore pressure ring (2), the rubber bag (3) is embedded and connected with the pore pressure ring (2), and the rubber bag is used to seal the air inlet and the water outlet.

2. The one-piece seal according to claim 1, characterized in that The pore pressure ring (2) comprises: A first annular portion (21) is sleeved on the frame (1), wherein the bottom of the first annular portion (21) is connected to the top of the limiting portion (11); a second annular portion (22) fixedly disposed above the first annular portion (21), wherein the inner diameter of the second annular portion (22) is smaller than the inner diameter of the first annular portion (21), and the outer diameter of the second annular portion (22) is larger than the outer diameter of the first annular portion (21); The third annular portion (23) is fixedly arranged above the second annular portion (22); the inner diameter of the third annular portion (23) is larger than the inner diameter of the second annular portion (22); and the outer diameter of the third annular portion (23) is smaller than the outer diameter of the second annular portion (22).

3. The one-piece seal according to claim 2, characterized in that: The first annular portion (21) is a stepped structure.

4. The one-piece seal according to claim 3, characterized in that: The encapsulation (3) comprises: A first wrapping portion (31) is sleeved on the second annular portion (22); A second wrapping portion (32) has an outer diameter smaller than that of the first wrapping portion (31), the second wrapping portion (32) is sleeved on the second annular portion (22), and the second wrapping portion (32) and the second annular portion (22) are embedded and connected; The third wrapping portion (33) has an outer diameter smaller than the outer diameter of the second wrapping portion (32), and the third wrapping portion (33) is sleeved on the limiting portion (11).

5. The one-piece seal according to claim 4, characterized in that: The third wrapping portion (33) further comprises: A vertical portion (331), the top of which is connected to the bottom of the second wrapping portion (32), and the vertical portion (331) is sleeved on the outer peripheral side of the limiting portion (11); The embedded portion (332) is fixedly arranged below the vertical portion (331), and the inner diameter of the embedded portion (332) is smaller than the inner diameter of the vertical portion (331).

6. The one-piece seal according to claim 5, characterized in that An annular groove (333) is provided inside the embedded portion (332).

7. The one-piece seal according to claim 6, characterized in that The outer peripheral side of the second annular portion (22) is a sloped surface.

8. The one-piece seal according to claim 1, characterized in that: The integrated seal also includes a snap ring (5), which is arranged at the bottom of the frame (1) and is used to support the moving iron core (4).

9. Automatic drain valve of fuel filter, characterized in that: Comprising an integrated seal as claimed in any one of claims 1-8.

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