Automatic water drainage mechanism of engine filter

Abstract

The utility model discloses an automatic water drainage mechanism of an engine filter, which comprises a plastic package shell connected with a filter element of the filter and an electromagnetic switch arranged in the plastic package shell, a water channel is arranged on the side of the plastic package shell, the plastic package shell is connected with a water drainage piece, and the water drainage piece is provided with a water accumulation cavity communicated with the water channel. A water drainage pipe communicated with the water accumulation cavity is arranged at the bottom of the water accumulation cavity, the electromagnetic switch is located above the water drainage pipe, and a movable iron core of the electromagnetic switch downwards penetrates into the water accumulation cavity and can seal the water drainage pipe. The electromagnetic switch is powered on to generate magnetic force to drive the movable iron core to move upwards, the movable iron core opens the drainage pipe, accumulated water at the bottom of the filter element of the filter flows into the water channel of the plastic package shell under the action of the gravity of the accumulated water, then flows into the accumulated water cavity of the drainage piece and is drained out through the drainage pipe, and therefore one-key automatic drainage of the filter is achieved.

Description

Technical Field

[0001] The utility model relates to automobile technology, in particular to engine technology. Background Art

[0002] Traditional engine filter draining methods are all manual draining, which requires the driver to manually unscrew the drain plug at the bottom of the filter to drain the water, and then tighten the drain plug after draining the water. This process wastes a lot of time and energy, and may also release the fuel in the filter, causing environmental pollution and certain safety hazards.

[0003] The patent document with authorization announcement number CN 214838413 U discloses an automatic drain valve for a fuel filter, including a shell, a wire frame is provided in the shell, a static iron core is provided in the wire frame, a coil is provided on the outer periphery of the static iron core, a moving iron core and a sealing plug rod are slidably provided in the wire frame, a first spring is provided between the moving iron core and the wire frame, a second spring is provided between the sealing plug rod and the wire frame, and a drain adapter is provided below the wire frame.

[0004] According to the above patent document, when the coil is not energized, the first spring presses against the moving iron core, so that the first rubber sealing surface of the moving iron core fits and seals with the top of the drain pipe, and the second spring presses against the sealing plug, so that the second rubber sealing surface of the sealing plug fits and seals with the vent hole of the wire rack, and the water is not discharged at this time. When the coil is energized, the moving iron core is affected by the electromagnetic force, overcomes the spring force of the first spring, and moves in the compression direction of the first spring, so that a gap is generated between the first rubber sealing surface of the moving iron core and the fitting surface of the drain pipe, and at the same time overcomes the spring force of the second spring, so that a gap is generated between the rubber surface of the sealing plug and the fitting surface of the vent hole of the wire rack, and the water is discharged at this time.

[0005] When in the draining state, since the entire drain valve (except the drain pipe) is a sealed structure, the joints of the various components of the drain valve are sealed with seals. Therefore, it is difficult for external air to enter the vent, which may cause water accumulation at the bottom of the filter that is difficult to discharge in the negative pressure system. Utility Model Content

[0006] The technical problem solved by the utility model is that in the drain valve in the prior art, it is difficult for external air to enter the vent hole, which may cause the problem that water accumulated at the bottom of the filter is difficult to be discharged in the negative pressure system.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: an automatic water drain mechanism for an engine filter, comprising a plastic-sealed shell connected to a filter element, an electromagnetic switch arranged in the plastic-sealed shell, a water channel being arranged on the side of the plastic-sealed shell, a drain piece being connected to the plastic-sealed shell, the drain piece being provided with a water accumulation cavity connected to the water channel, a drain pipe connected to the water accumulation cavity being arranged at the bottom of the water accumulation cavity, the electromagnetic switch being located above the drain pipe, the moving iron core of the electromagnetic switch being inserted downward into the water accumulation cavity, and the moving iron core being able to close the drain pipe.

[0008] The electromagnetic switch comprises a bobbin, a static iron core arranged at the center of the bobbin, a coil wound around the static iron core, a moving iron core located below the static iron core, and a first spring arranged between the moving iron core and the static iron core.

[0009] The wire rack is provided with an upward extending structure, on which an air vent and an air valve are provided, the air valve can close the air vent, a push rod is provided below the air valve, the push rod passes downward through the static iron core and abuts against the moving iron core, and a second spring is provided above the air valve; a wire rack neck structure is formed between the wire rack body and the upward extending structure, the plastic-sealed shell is provided with a neck positioning structure that cooperates with the wire rack neck structure, a limiting step is provided at the cooperation position between the upward extending structure and the neck positioning structure, the limiting step creates a gap between the upward extending structure and the neck positioning structure, an atmospheric communicating hole is provided on the plastic-sealed shell, the atmospheric communicating hole is located at the gap between the upward extending structure and the neck positioning structure, and is connected to the gap between the upward extending structure and the neck positioning structure, while the air vent on the upward extending structure is connected to the gap between the upward extending structure and the neck positioning structure.

[0010] When the moving iron core is attracted to the static iron core, the cylindrical structure at its tail pushes the push rod upward, and the push rod then pushes the air valve to overcome the reaction force of the second spring and move upward. At this time, the air valve is in an open state. The outside air enters the water at the bottom of the filter element through the vent provided in the upward extension structure of the wire frame, so that the water discharge mechanism is no longer in a negative pressure state. The water at the bottom of the filter element is smoothly discharged through the drain pipe provided in the water discharge part under the action of its own gravity. Among them, the silicone pad is welded at the lower end of the air valve to ensure the air tightness of the vent when the air valve is closed.

[0011] The electromagnetic switch controls the opening and closing of the moving iron core and the air valve at the same time through a set of coils, solving the problem that the water at the bottom of the filter is difficult to drain in the negative pressure system, and realizing the automatic one-button draining of the filter. The "one-button" is used to control the power supply from the power supply interface to the coil.

[0012] The plastic-sealed housing is connected to the filter element through a connector, the connector is connected to the filter element through an external thread, and the plastic-sealed housing is connected to the connector through a hexagon socket bolt. The connector is a "bridge" mechanism connecting the filter element and the plastic-sealed housing, and plays a connecting and sealing role. The plastic-sealed housing is embedded with an electromagnetic switch, and the lower end of the plastic-sealed housing is connected to a water discharge part.

[0013] The bottom of the moving iron core is coated with silicone rubber. Wires are led out from both ends of the coil, and the crimping terminals are assembled with connectors to form the power supply interface of the coil. After the coil is powered through the power supply interface, the current in the coil will generate a magnetic field. The generated magnetic field causes the static iron core to generate electromagnetic attraction to attract the moving iron core. The electromagnetic force overcomes the reaction force of the first spring to attract the moving iron core to the static iron core and move it upward. The moving iron core is in an open state and begins to drain water. The moving iron core is in the shape of a "bullet" as a whole, and the head is welded and coated with silicone rubber, which ensures the sealing of the moving iron core to the drain pipe when it is closed.

[0014] The upwardly extending structure is clamped with a spring clamp, and the top of the second spring is against the spring clamp. The second spring is sleeved between the air valve and the spring clamp through the first annular cylindrical structure on the upper end surface of the air valve and the second annular cylindrical structure provided in the inner cavity of the spring clamp. The spring clamp is locked to the locking port provided at the upper end of the upwardly extending structure through a plurality of hook-shaped buckles evenly distributed around the spring clamp, and the upper end surface of the spring clamp is provided with a plurality of evenly distributed "petal-shaped" air holes, which are conducive to the escape of air and the establishment of air pressure balance.

[0015] The electromagnetic switch is injection molded based on the wire frame and is arranged in a plastic shell. A wire frame neck structure is formed between the wire frame body and the upward extending structure, and the plastic shell is provided with a neck positioning structure that cooperates with the wire frame neck structure. Before injection molding, the upward extending structure is first installed in the neck positioning structure, and a limiting step is provided at the position where the upward extending structure and the neck positioning structure cooperate, and the limiting step allows a gap between the upward extending structure and the neck positioning structure. Afterwards, injection molding is performed in the plastic shell, and the wire frame body in the plastic shell is connected to the upward extending structure into an integral structure through injection molding. Among them, an atmospheric communication hole is provided on the plastic shell, and the atmospheric communication hole is located in the gap between the upward extending structure and the neck positioning structure, and is connected to the gap between the upward extending structure and the neck positioning structure, and the vent hole on the upward extending structure is connected to the gap between the upward extending structure and the neck positioning structure.

[0016] The bottom of the plastic-sealed shell is connected with a water discharge part through screws, and the water discharge part is provided with a water receiving pipe and a drainage pipe which are connected with the water channel and the water accumulation cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the automatic water drain mechanism of the engine filter;

[0019] Figure 2 is a schematic diagram of the connecting parts;

[0020] Figure 3 It is a schematic diagram of a plastic-encapsulated housing;

[0021] Figure 4 is a schematic diagram of an electromagnetic switch;

[0022] Figure 5 This is a schematic diagram of the launching parts.

[0023] Explanation of symbols in the figure:

[0024] 10. Filter element;

[0025] 20. Plastic-sealed shell; 21. Water channel; 22. Plastic-sealed shell mounting hole; 24. Plastic-sealed shell stopper structure; 25. Positioning pin; 26. Screw mounting hole; 27. Water channel connection hole; 28. Neck positioning structure; 281. Limiting step;

[0026] 30. Electromagnetic switch; 31. Moving iron core; 311. Silicon rubber; 312. Cylindrical structure of moving iron core; 32. Wire rack; 33. Static iron core; 34. Coil; 341. Power supply interface; 35. First spring; 36. Upward extension structure; 361. Air vent; 362. Air valve; 363. Second spring; 364. Spring clip; 365. Silicon pad; 366. First annular cylindrical structure; 367. Second annular cylindrical structure; 368. Hook-type buckle; 369. Air hole; 37. Ejector rod; 38. Wire rack neck structure;

[0027] 40. Drainage parts; 41. Water accumulation chamber; 42. Drain pipe; 43. Water connection pipe; 44. Drainage pipe; 45. Positioning pin hole;

[0028] 50. Connecting piece; 51. External thread; 52. Hexagon socket bolt; 53. O-ring; 54. Connecting piece stop structure; 55. Through hole. DETAILED DESCRIPTION

[0029] Combination Figure 1 , Figure 4 , Figure 5 An automatic water discharge mechanism for an engine filter includes a plastic-sealed shell 20 connected to a filter element 10, an electromagnetic switch 30 arranged in the plastic-sealed shell, a water channel 21 is arranged on the side of the plastic-sealed shell, a drain component 40 is connected to the plastic-sealed shell, the drain component is provided with a water accumulation cavity 41 connected to the water channel, a drain pipe 42 connected to the water accumulation cavity is arranged at the bottom of the water accumulation cavity, the electromagnetic switch is located above the drain pipe, a moving iron core 31 of the electromagnetic switch goes deep into the water accumulation cavity, and the moving iron core can close the drain pipe.

[0030] The electromagnetic switch 30 is energized to generate magnetic force, driving the moving iron core 31 to move upward, and the moving iron core opens the drain pipe 42. The water accumulated at the bottom of the filter element 10 flows into the waterway 21 of the plastic-sealed shell 20 under the action of its own gravity, and then flows into the water accumulation cavity 41 of the drain component 40, and is discharged outside through the drain pipe 42.

[0031] Combination Figure 2 , Figure 3 The plastic-sealed housing 20 is connected to the filter element 10 via a connecting piece 50 , the connecting piece is connected to the filter element 10 via an external thread 51 , and the plastic-sealed housing 20 is connected to the connecting piece via a hexagon socket bolt 52 .

[0032] The connector 50 is a "bridge" mechanism that connects the filter element 10 and the plastic-sealed housing 20, and plays a connecting and sealing role. The external thread 51 at the upper end of the connector 50 is M36. An O-ring 53 is provided at the lower end of the M36 external thread, which is used to seal between the filter element 10 and the connector 50 to prevent water and oil leakage. A connector stop structure 54 is provided at the lower end of the connector 50, which is used to cooperate with the installation of the O-ring to prevent water and oil leakage at the joint surface of the connector 50 and the plastic-sealed housing 20. 4xM4 through holes 55 are evenly distributed around the connector 50, and M4 hexagon socket bolts are used to achieve the connection and fastening between the connector 50 and the plastic-sealed housing 20.

[0033] The plastic-sealed shell 20 is connected and fastened to the connecting piece 50 through the plastic-sealed shell mounting hole 22 and the hexagon socket bolt 52 provided on the upper end surface, and the plastic-sealed shell stop structure 24, the O-ring and the connecting piece stop structure 54 provided at the lower end of the connecting piece 50 jointly realize the sealing of the joint surface between the connecting piece 50 and the plastic-sealed shell 20 to prevent water leakage and oil leakage.

[0034] The plastic-encapsulated shell 20 is embedded with a plastic-encapsulated electromagnetic switch 30, and the lower end of the plastic-encapsulated shell 20 is connected to a water discharge member 40. Figure 3 , Figure 5 The bottom of the plastic-sealed shell 20 is provided with a positioning pin 25 and a screw installation hole 26, and 4xM4 screws are used in combination to achieve the positioning, connection and fastening of the water discharge part 40. The water discharge part is provided with a water receiving pipe 43 and a drainage pipe 44 connecting the water channel 21 and the water accumulation chamber 41. The water channel 21 is provided on the left side of the plastic-sealed shell 20, and its upper end is connected to the water accumulation at the bottom of the filter element through a connecting piece, and its lower end is connected to the water receiving pipe 43 of the water discharge part through a water channel connecting hole 27. The water discharge part is provided with a positioning pin hole 45 for the installation and positioning of the water discharge part.

[0035] like Figure 4The electromagnetic switch 30 includes a wire rack 32, a static iron core 33 arranged at the center of the wire rack, a coil 34 wound around the static iron core, a moving iron core located below the static iron core, a first spring 35 provided between the moving iron core and the static iron core, and a silicone rubber 311 coated below the moving iron core. Wires are led out from both ends of the coil 34, and a power supply interface 341 of the coil is formed after the crimping terminals are assembled with connectors. After the coil is powered through the power supply interface, the current in the coil will generate a magnetic field, and the generated magnetic field will cause the static iron core 33 to generate an electromagnetic attraction to attract the moving iron core 31. The electromagnetic force overcomes the reaction force of the first spring 35 to attract the moving iron core 31 to the static iron core 33 and move upward, and the moving iron core is in an open state and starts to drain water. The moving iron core 31 is in the shape of a "bullet" as a whole, and the head is welded and coated with silicone rubber 311, which ensures the sealing of the moving iron core 31 to the drain pipe 42 in the closed state.

[0036] The wire rack 32 is provided with an upward extending structure 36, on which a vent hole 361 and an air valve 362 are provided. The air valve can close the vent hole. A push rod 37 is provided below the air valve, which passes through the static iron core 33 downward and abuts against the moving iron core 31. A second spring 363 is provided above the air valve.

[0037] When the moving iron core 31 is attracted to the static iron core 33, the cylindrical structure at its tail pushes the push rod 37 to move upward, and the push rod then pushes the air valve 362 to overcome the reaction force of the second spring 363 and move upward. At this time, the air valve 362 is in an open state. The outside air enters the water at the bottom of the filter element 10 through the vent hole 361 provided in the upward extension structure 36 of the wire frame, so that the water discharge mechanism is no longer in a negative pressure state. The water at the bottom of the filter element is smoothly discharged through the drain pipe provided in the water discharge part 40 under the action of its own gravity. Among them, the lower end of the air valve 362 is welded with a silicone pad 365 to ensure the air tightness of the vent hole 361 when the air valve 362 is closed.

[0038] The upward extending structure 36 is clamped with a spring clamp 364, and the top of the second spring 363 is against the spring clamp. The second spring 363 is sleeved between the air valve 362 and the spring clamp 364 through the first annular cylindrical structure 366 on the upper end surface of the air valve 362 and the second annular cylindrical structure 367 provided in the inner cavity of the spring clamp. The spring clamp 364 is locked to the locking port provided on the upper end of the upward extending structure 36 through a plurality of hook-shaped buckles 368 evenly distributed around the spring clamp 364, and the upper end surface of the spring clamp 364 is provided with a plurality of "petal-shaped" evenly distributed air holes 369, which are conducive to the escape of air and the establishment of air pressure balance.

[0039] The electromagnetic switch 30 is injection molded based on the wire frame 32 and is arranged in the plastic package shell 20. A wire frame neck structure 38 is formed between the wire frame body and the upward extension structure 36, and the plastic package shell is provided with a neck positioning structure 28 that cooperates with the wire frame neck structure. Before injection molding, the upward extension structure 36 is first installed in the neck positioning structure 38, and a limiting step 281 is provided at the position where the upward extension structure cooperates with the neck positioning structure 28, and the limiting step allows a gap between the upward extension structure 36 and the neck positioning structure 28. Afterwards, injection molding is performed in the plastic package shell 20, and the wire frame body in the plastic package shell is connected to the upward extension structure 36 to form an integral structure through injection molding. Among them, the plastic package shell 20 is provided with an atmospheric communication hole, which is located at the gap between the upward extension structure and the neck positioning structure 38, and is connected with the gap between the upward extension structure and the neck positioning structure, and the vent 361 on the upward extension structure is connected with the gap between the upward extension structure 36 and the neck positioning structure 38.

[0040] The utility model solves the problem that water accumulated at the bottom of the filter is difficult to be discharged in the negative pressure system, realizes one-key automation of filter water discharge, improves the driver's work efficiency, protects the engine's fuel system, prolongs the engine's service life, and avoids environmental pollution and safety hazards.

[0041] The above contents are only preferred implementation modes of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there may be changes in the specific implementation mode and application scope. The content of this specification should not be understood as limiting the present invention.

Claims

1. An automatic water discharge mechanism for an engine filter, comprising a plastic-sealed housing (20) connected to a filter element (10), and an electromagnetic switch (30) arranged in the plastic-sealed housing, a water channel (21) being arranged on the side of the plastic-sealed housing, a water discharge part (40) being connected to the plastic-sealed housing, the water discharge part being provided with a water accumulation cavity (41) communicating with the water channel, a drainage pipe (42) being arranged at the bottom of the water accumulation cavity and communicating with the water accumulation cavity, the electromagnetic switch being located above the drainage pipe, a moving iron core (31) of the electromagnetic switch extending downward into the water accumulation cavity, and the moving iron core being capable of closing the drainage pipe; the electromagnetic switch (30) comprising a wire frame ( 32), a static iron core (33) arranged at the center of the wire frame, a coil (34) wound around the static iron core, a moving iron core located below the static iron core, a first spring (35) arranged between the moving iron core and the static iron core, the wire frame (32) is provided with an upwardly extending structure (36), a vent hole (361) and an air valve (362) are arranged on the upwardly extending structure, the air valve can close the vent hole, a push rod (37) is arranged below the air valve, the push rod passes downward through the static iron core (33) and abuts against the moving iron core (31), and a second spring (363) is arranged above the air valve; the characteristics are: A wire rack neck structure (38) is formed between the wire rack body and the upwardly extending structure (36); the plastic-encapsulated shell is provided with a neck positioning structure (28) that cooperates with the wire rack neck structure; a limiting step (281) is provided at the position where the upwardly extending structure and the neck positioning structure cooperate; the limiting step creates a gap between the upwardly extending structure (36) and the neck positioning structure (28); an atmospheric communication hole is provided on the plastic-encapsulated shell (20); the atmospheric communication hole is located at the gap between the upwardly extending structure and the neck positioning structure, and is communicated with the gap between the upwardly extending structure and the neck positioning structure; and a vent hole (361) on the upwardly extending structure is communicated with the gap between the upwardly extending structure (36) and the neck positioning structure.

2. The automatic water drain mechanism for the engine filter according to claim 1, characterized in that: The plastic-sealed housing (20) is connected to the filter element (10) via a connecting piece (50), the connecting piece is connected to the filter element via an external thread (51), and the plastic-sealed housing (20) is connected to the connecting piece via a hexagon socket bolt (52).

3. The automatic water drain mechanism for the engine filter according to claim 1, characterized in that: The lower side of the moving iron core is coated with silicone rubber (311).

4. The automatic water drain mechanism for the engine filter according to claim 1, characterized in that: The upwardly extending structure (36) is clamped with a spring clamp (364), and the top end of the second spring (363) abuts against the spring clamp.

5. The automatic water drain mechanism for the engine filter according to claim 1, characterized in that: The bottom of the plastic-sealed housing (20) is connected to a water discharge member (40) via screws, and the water discharge member is provided with a water receiving pipe (43) and a drainage pipe (44) communicating the water channel (21) and the water accumulation chamber (41).

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