Breathing valve and fuel filter

Abstract

The present invention relates to the technical field of fuel filters, and discloses a vent valve and a fuel filter. The vent valve includes a valve body and a valve core, the valve body is connected to the vent hole, an air inlet is provided at one end, an air outlet is provided at the other end, and a guide rib is provided on the inner wall of the valve body along the axial direction of the valve body; the valve core is placed in the valve body and slidably connected with the guide rib, the valve core is provided with an initial position and a working position, when the valve core is in the initial position, the air inlet is disconnected from the air outlet, when the valve core is in the working position, the air inlet is connected to the air outlet, and the valve core can be in the initial position and the working position in turn by pressing the valve core. The present invention changes the screw-type ventilation into a press-type ventilation, making the operation more convenient, labor-saving, and the ventilation efficiency higher; the valve core only has an initial position and a working position, which improves the poor sealing effect caused by improper operation and ensures the sealing effect of the vent valve; there is no need to disassemble the vent valve for ventilation, which reduces the risk of the vent valve breaking and increases the service life of the vent valve.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel filters, and in particular to a vent valve and a fuel filter. Background Art

[0002] As a crucial component of the engine's fuel system, the fuel filter's primary function is to filter impurities and separate water from the fuel. To expedite draining during regular or maintenance draining, the current method is to use a vent valve located at the top of the fuel filter. To drain the fuel, loosen the valve to allow air to enter the filter, accelerating the flow of water or fuel out the bottom. Once all the water or fuel has been drained, tighten the vent valve.

[0003] However, in the prior art, the vent valve and the fuel filter are usually connected by a threaded connection. The operator needs to screw the vent valve to allow air to enter the fuel filter. The screwing method is inconvenient to operate and the screwing process is time-consuming, resulting in low work efficiency. Since the vent valve and the fuel filter are sealed by a sealing ring, it is generally difficult to control the torque when disassembling and assembling manually or with a wrench. If the vent valve is not tightened, the sealing effect will be very poor. In addition, regular water or oil drainage means that the vent valve needs to be frequently disassembled and assembled, and long-term operation will lead to the risk of the vent valve breaking.

[0004] Therefore, a vent valve is urgently needed to solve the above problems. Summary of the Invention

[0005] Based on the above, an object of the present invention is to provide a breather valve and a fuel filter that are easy to operate, labor-saving, and have good sealing effects.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A vent valve, comprising:

[0008] A valve body is connected to the vent hole, one end of the valve body is provided with an air inlet, the other end is provided with an air outlet, and the inner wall of the valve body is provided with guide ribs along the axis direction of the valve body;

[0009] A valve core is placed in the valve body, and the valve core is slidably connected to the guide rib. The valve core is provided with an initial position and a working position. When the valve core is located in the initial position, the air inlet is disconnected from the air outlet. When the valve core is located in the working position, the air inlet is connected to the air outlet. By pressing the valve core, the valve core can be in the initial position and the working position in sequence.

[0010] As a preferred solution of the vent valve, the guide rib is provided with an inclined surface at one end close to the air outlet, and the valve core comprises:

[0011] The movable core has a sawtooth groove and a guide groove that slides with the guide rib at intervals on one end;

[0012] A limiting core, one end of which is provided with a limiting groove cooperating with the serrated groove and a through groove slidably cooperating with the guide rib, and a first spring is provided between the other end and the valve body, one end of the first spring abuts against the valve body, and the other end abuts against the limiting core;

[0013] Press the movable core, and the inclined surface cooperates with the limiting groove and the through groove in sequence. When the inclined surface is placed in the through groove, the valve core is in the working position. When the inclined surface abuts against the limiting groove, the valve core is in the initial position.

[0014] As a preferred solution of the vent valve, it further includes a valve handle, the valve body is placed in the valve handle, the valve handle is provided with a through hole, and one end of the movable core is protruded from the through hole.

[0015] As a preferred solution of the vent valve, it further includes a second spring, one end of the second spring abuts against the movable core, and the other end of the second spring abuts against the valve handle.

[0016] As a preferred solution of the vent valve, the valve handle is provided with a groove along the circumference, a boss is provided in the groove, and the valve body is provided with a protrusion on the circumference, the protrusion is placed in the groove and is engaged with the boss.

[0017] As a preferred solution of the vent valve, an air guide cavity connected to the air inlet is provided on the valve handle, an air guide channel is provided between the protrusion and the groove, and the air guide cavity is connected to the outside through the air guide channel.

[0018] As a preferred solution for a vent valve, a sealing groove is circumferentially provided on the movable core, and a sealing cavity cooperating with the sealing groove is provided on the valve body. When the valve core is in the initial position, the sealing groove is sealed and cooperated with the sealing cavity. When the valve core is in the working position, the sealing groove and the sealing cavity are disengaged from the sealing cooperation.

[0019] As a preferred solution of the vent valve, three guide ribs are provided, and three serrated grooves, three guide grooves, three limiting grooves and three through grooves are provided.

[0020] As a preferred solution of the vent valve, a thread is provided on the side wall of the valve body between the air inlet and the air outlet, and the valve body and the vent hole are threadedly connected.

[0021] A fuel filter comprises the vent valve described in any one of the above solutions.

[0022] The beneficial effects of the present invention are as follows: by providing a guide rib extending along the axial direction of the valve body on the inner wall of the valve body, and enabling the valve core to move along the guide rib, in the process of pressing and moving the valve core, the valve core can be in the initial position and the working position in turn, so as to selectively connect the air inlet and the air outlet, thereby realizing the ventilation operation of the vent hole. The ventilation method of the prior art by screwing is changed to ventilation by pressing. On the one hand, the operation is more convenient and labor-saving, and only needs to be pressed, thereby improving the ventilation efficiency; on the other hand, the valve core only has the initial position and the working position, and there is no poor sealing due to improper operation, which effectively ensures the sealing effect of the vent valve; in addition, by using the above-mentioned vent valve, the ventilation function can be realized without frequent disassembly of the vent valve, which reduces the risk of the vent valve breaking and effectively improves the service life of the vent valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0024] Figure 1 Schematic diagram of a vent valve core in an initial position provided by a specific embodiment of the present invention;

[0025] Figure 2 Schematic diagram of a vent valve core in a working position provided by a specific embodiment of the present invention;

[0026] Figure 3 is a schematic diagram of a valve body provided in a specific embodiment of the present invention;

[0027] Figure 4 is a cross-sectional view of a valve body provided by a specific embodiment of the present invention;

[0028] Figure 5 is a schematic diagram of a valve handle provided in a specific embodiment of the present invention;

[0029] Figure 6 is a schematic diagram of a movable core provided in a specific embodiment of the present invention;

[0030] Figure 7 is a cross-sectional view of a movable core provided in a specific embodiment of the present invention;

[0031] Figure 8 is a schematic diagram of a limiting core provided in a specific embodiment of the present invention;

[0032] Figure 9 It is a cross-sectional view of a movable core and a limiting core provided in a specific embodiment of the present invention.

[0033] In the picture:

[0034] 1-valve body; 11-air inlet; 12-air outlet; 13-guide rib; 14-inclined surface; 15-protrusion; 16-outer annular surface; 17-sealing cavity; 18-guide cavity; 19-air guide groove;

[0035] 2-movable core; 21-serrated groove; 22-guide groove; 23-sealing groove; 24-second flow channel;

[0036] 3-limiting core; 31-limiting groove; 32-through groove; 33-first flow channel;

[0037] 4-valve handle; 41-air guide cavity; 42-groove; 43-boss; 44-through hole; 45-inner annular surface;

[0038] 51-first spring; 52-second spring;

[0039] 61-first sealing ring; 62-second sealing ring. DETAILED DESCRIPTION

[0040] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention more clearly understood, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It is obvious that the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work shall fall within the scope of protection of the present invention.

[0041] like Figures 1-9 As shown, this embodiment provides a vent valve for a fuel filter, which includes a valve body 1 and a valve core. The valve body 1 is connected to the vent hole, and is provided with an air inlet 11 at one end and an air outlet 12 at the other end. The inner wall of the valve body 1 is provided with a guide rib 13 along the axial direction of the valve body 1; the valve core is placed in the valve body 1 and is slidably connected to the guide rib 13. The valve core is provided with an initial position and a working position. When the valve core is in the initial position, the air inlet 11 is disconnected from the air outlet 12. When the valve core is in the working position, the air inlet 11 is connected to the air outlet 12. By pressing the valve core, the valve core can be in the initial position and the working position in turn.

[0042] By providing a guide rib 13 along the axis of the vent hole on the inner wall of the valve body 1 and enabling the valve core to move along the guide rib 13, the valve core can be in the initial position and the working position in turn during the process of pressing and moving the valve core, so as to selectively connect the air inlet 11 and the air outlet 12, thereby realizing the ventilation operation of the vent hole. The ventilation method of the prior art is changed from the ventilation method of screwing to ventilation by pressing. On the one hand, the operation is more convenient and labor-saving, and only needs to be pressed, thereby improving the ventilation efficiency. On the other hand, the valve core only has the initial position and the working position, and there is no situation where the sealing effect is poor due to improper operation, which effectively ensures the sealing effect of the vent valve. In addition, the above-mentioned vent valve can realize the ventilation function without frequent disassembly of the vent valve, which reduces the risk of the vent valve breaking and effectively improves the service life of the vent valve.

[0043] Furthermore, threads are provided on the sidewall of the valve body 1 between the air inlet 11 and the air outlet 12, threadedly connecting the valve body 1 to the vent. This threaded connection provides good sealing and facilitates disassembly of the vent valve. Preferably, to further enhance the sealing of the threaded connection between the valve body 1 and the vent, a second sealing ring 62 is provided on the valve body 1. Here, the cross-section of the second sealing ring 62 is configured to be circular.

[0044] Specifically, if Figure 1-Figure 5 As shown, the vent valve also includes a valve handle 4, and the valve body 1 is placed in the valve handle 4. The operator can achieve the connection between the valve body 1 and the vent hole by twisting the valve handle 4. The valve handle 4 is provided with a through hole 44, and one end of the valve core is protruded from the through hole 44 to facilitate the operator's pressing of the valve core. The valve handle 4 is provided with a groove 42 along the circumference, and a boss 43 extending axially along the valve handle 4 is provided in the groove 42. The valve body 1 is provided with a protrusion 15 on the circumference. The protrusion 15 is placed in the groove 42 and is engaged with the boss 43 to achieve the connection between the valve body 1 and the valve handle 4. There are multiple protrusions 15, and correspondingly, there are also multiple grooves 42. Multiple protrusions 15 are evenly spaced on the outer annular surface 16 of the valve body 1, and multiple grooves 42 are evenly spaced on the inner annular surface 45 of the valve handle 4.

[0045] Furthermore, the valve handle 4 is provided with an air guide cavity 41 connected to the air inlet 11. To facilitate the connection between the air guide cavity 41 and the outside world, the diameter of the inner annular surface 45 is larger than the diameter of the outer annular surface 16. An annular channel is formed between the inner annular surface 45 and the outer annular surface 16. The gas in the air guide cavity 41 can be connected to the outside world via the annular channel. Furthermore, to increase the connection between the air guide cavity 41 and the outside world, an air guide channel connected to the outside world is also provided between the protrusion 15 and the groove 42. The gas in the air guide cavity 41 can be connected to the outside world through the annular channel / air guide channel, thereby improving the ventilation efficiency. The air guide cavity 41 is connected to the outside world through the annular channel / air guide channel, which facilitates the circulation of gas. During ventilation, the outside air enters the fuel filter through the annular channel / air guide channel, the air guide cavity 41, the air inlet 11 and the air outlet 12, thereby achieving ventilation.

[0046] To achieve the change of the valve core between the initial position and the working position, specifically, Figure 6-Figure 9 As shown, the valve core includes a movable core 2 and a limiting core 3. One end of the movable core 2 is provided with a serrated groove 21 and a guide groove 22 that slides with the guide rib 13. The limiting core 3 is provided with a limiting groove 31 that mates with the serrated groove 21 and a through groove 32 that slides with the guide rib 13. The movable core 2 is circumferentially provided with a sealing groove 23, and the valve body 1 is provided with a sealing cavity 17 that mates with the sealing groove 23. When the valve core is in the initial position, the sealing groove 23 seals with the sealing cavity 17. When the valve core is in the working position, the sealing groove 23 and the sealing cavity 17 are no longer sealed. In this embodiment, three guide ribs 13 are provided, and the three guide ribs 13 are evenly spaced along the circumference of the valve body 1. Accordingly, there are three serrated grooves 21, three guide grooves 22, three limiting grooves 31, and three through grooves 32.

[0047] The vent valve also includes a first spring 51 and a second spring 52. One end of the first spring 51 abuts the valve body 1, and the other end abuts the stopper core 3. One end of the second spring 52 abuts the movable core 2, and the other end abuts the valve handle 4. Accordingly, the guide rib 13 is provided with a sloped surface 14 at the end near the air outlet 12. When the movable core 2 is pressed, the sloped surface 14 engages with the stopper groove 31 and the through-groove 32, respectively. When the sloped surface 14 is positioned within the through-groove 32, the valve core is in the operating position. When the sloped surface 14 abuts the stopper groove 31, the valve core is in the initial position.

[0048] Specifically, the limiting core 3 is provided with a first flow channel 33, which connects the sealed cavity 17 with the gas outlet 12. A second flow channel 24 is provided between the movable core 2 and the limiting core 3, and the second flow channel 24 can selectively connect with the gas inlet 11. It is worth noting that to reduce the resistance to gas circulation, the gas outlet 12 is provided on one end surface of the valve body 1, and the gas outlet 12 is coaxially arranged with the valve body 1, so that the gas passing through the first flow channel 33 can directly enter the gas outlet 12, which is conducive to reducing ventilation resistance and improving ventilation efficiency.

[0049] When the valve core is in the initial position, the second flow channel 24 is disconnected from the air inlet 11, while the air outlet 12, the first flow channel 33, and the second flow channel 24 are connected to the fuel filter. Since the sealing groove 23 is sealed with the sealing cavity 17, gas cannot flow out of the fuel filter from the annular channel / air guide channel, the air guide cavity 41, and the air inlet 11, and the fuel filter operates normally. When the fuel filter needs to be drained / oiled, the vent valve needs to be operated to speed up the draining / oiling process, placing the valve core in the working position. When the valve core is in the working position, the sealing groove 23 is disconnected from the sealing cavity 17, allowing external gas to flow through the annular channel / air guide channel, the air guide cavity 41, the air inlet 11, the sealing cavity 17, the second flow channel 24, and the first flow channel 33, and finally out of the vent valve through the air outlet 12 and into the fuel filter, thus fulfilling the vent valve's ventilation function and speeding up the draining / oiling process.

[0050] like Figure 1 As shown, the valve core is in the initial position, and the inclined surface 14 of the guide rib 13 abuts the limiting groove 31. At this time, the sealing groove 23 and the sealing cavity 17 are sealed and matched, and the air outlet 12 and the air inlet 11 are not connected. Press the movable core 2 downward, the guide groove 22 of the movable core 2 and the limiting groove 31 of the limiting core 3 are matched with the guide rib 13, and the movable core 2 and the limiting core 3 move downward. When the limiting groove 31 is completely separated from the guide rib 13, because the limiting groove 31 and the serrated groove 21 are misaligned when they are matched, the limiting core 3 will rotate 60°, so that the through groove 32 is opposite to the guide rib 13. Next, release the movable core 2. At this time, the elastic force of the first spring 51 is greater than the elastic force of the second spring 52. The combined force of the first spring 51 and the second spring 52 pushes the valve core upward, so that the through groove 32 and the guide rib 13 are embedded and matched. During the upward movement of the valve core, the elastic force of the first spring 51 gradually decreases, and the elastic force of the second spring 52 gradually increases. When the combined force of the first spring 51 and the second spring 52 reaches equilibrium, the valve core stops moving. At this time, the valve core is in a Figure 2 In the working position shown, the sealing groove 23 is disconnected from the sealing cavity 17, and external gas can flow into the interior of the fuel filter through the annular channel / air guide channel, the air guide cavity 41, the air inlet 11, the sealing cavity 17, the second flow channel 24 and the first flow channel 33, and finally through the air outlet 12, thereby realizing the ventilation function of the vent valve.

[0051] like Figure 2As shown, after the ventilation is completed, the movable core 2 is pressed downward again, and the guide groove 22 of the movable core 2 and the through groove 32 of the limiting core 3 are matched with the guide rib 13, and the movable core 2 and the limiting core 3 move downward. When the through groove 32 is completely separated from the guide rib 13, because the limiting groove 31 and the serrated groove 21 are misaligned in angle when they cooperate, the limiting core 3 will rotate 60° so that the limiting groove 31 is opposite to the guide rib 13; next, the movable core 2 is released, and the elastic force of the first spring 51 is greater than the elastic force of the second spring 52. The combined force of the first spring 51 and the second spring 52 pushes the valve core to move upward, so that the limiting groove 31 and the guide rib 13 are embedded and matched. At this time, the valve core is restored to the position as shown in FIG. Figure 1 In the initial position shown, the sealing groove 23 is sealed with the sealing cavity 17, the second flow channel 24 is not connected to the air inlet 11, the air outlet 12, the first flow channel 33 and the second flow channel 24 are connected to the interior of the fuel filter, the fuel filter is working normally, and gas cannot enter the interior of the fuel filter through the annular channel / air guide channel, the air guide cavity 41 and the air inlet 11.

[0052] Optionally, in order to achieve sealing between the sealing groove 23 and the sealing cavity 17 , a first sealing ring 61 is provided in the sealing groove 23 , and the cross section of the first sealing ring 61 is set to be circular.

[0053] Optionally, a guide cavity 18 is provided at one end of the sealing cavity 17 near the second spring 52. The diameter of the guide cavity 18 is larger than that of the sealing cavity 17. This serves to reduce friction between the sealing cavity 17 and the first sealing ring 61 when the valve core changes from the initial position to the operating position, thereby reducing the resistance to movement of the movable core 2 and facilitating rapid ventilation. Furthermore, a gas guide groove 19 is provided within the guide cavity 18 to facilitate rapid gas circulation.

[0054] Preferably, the setting of the second spring 52 can ensure the abutment between the movable core 2 and the limit core 3 when the valve core is in the initial position, thereby ensuring the sealed connection between the sealing groove 23 and the sealing cavity 17, ensuring the sealing effect, and preventing sealing failure; at the same time, the second spring 52 can also prevent the movable core 2 from moving up and down, reducing the possibility of abnormal noise due to movement, and reducing the wear of the movable core 2 and the second sealing ring 62.

[0055] This embodiment also provides a fuel filter, including a vent valve as described in any of the above schemes. The vent valve is arranged on the top of the fuel filter housing. The fuel filter can be ventilated by pressing the valve core, which facilitates the drainage / oil operation of the fuel filter. The operation process is simple, convenient and efficient.

[0056] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

[0057] In the description of the present invention, it should be noted that the terms "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," and "outside" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0058] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

Claims

1. A vent valve, characterized in that: include: A valve body (1) is connected to the vent hole, one end of the valve body (1) is provided with an air inlet (11), the other end is provided with an air outlet (12), and the inner wall of the valve body (1) is provided with guide ribs (13) along the axial direction of the valve body (1); A valve core is disposed in the valve body (1), the valve core is slidably connected to the guide rib (13), the valve core is provided with an initial position and a working position, when the valve core is located in the initial position, the air inlet (11) is disconnected from the air outlet (12), when the valve core is located in the working position, the air inlet (11) is connected to the air outlet (12), and by pressing the valve core, the valve core can be in the initial position and the working position in sequence; An inclined surface (14) is provided at one end of the guide rib (13) close to the air outlet (12), and the valve core comprises: A movable core (2) having a sawtooth groove (21) and a guide groove (22) that is slidably matched with the guide rib (13) arranged at one end; A limit core (3), one end of which is provided with a limit groove (31) cooperating with the sawtooth groove (21) and a through groove (32) slidably cooperating with the guide rib (13), and a first spring (51) is provided between the other end and the valve body (1), one end of the first spring (51) abuts against the valve body (1), and the other end of the first spring (51) abuts against the limit core (3); When the movable core (2) is pressed, the inclined surface (14) cooperates with the limiting groove (31) and the through groove (32) in sequence; when the inclined surface (14) is placed in the through groove (32), the valve core is in the working position; when the inclined surface (14) abuts against the limiting groove (31), the valve core is in the initial position.

2. The vent valve according to claim 1, characterized in that It also comprises a valve handle (4), the valve body (1) being disposed inside the valve handle (4), the valve handle (4) being provided with a through hole (44), and one end of the movable core (2) being protruding from the through hole (44).

3. The vent valve according to claim 2, characterized in that: It also comprises a second spring (52), one end of the second spring (52) being in contact with the movable core (2), and the other end of the second spring (52) being in contact with the valve handle (4).

4. The vent valve according to claim 2, characterized in that: The valve handle (4) is provided with a groove (42) along the circumference, a boss (43) is provided in the groove (42), and a protrusion (15) is provided in the circumference of the valve body (1), the protrusion (15) is placed in the groove (42) and is engaged with the boss (43).

5. The vent valve according to claim 4, characterized in that The valve handle (4) is provided with an air guide cavity (41) in communication with the air inlet (11), an air guide channel is provided between the protrusion (15) and the groove (42), and the air guide cavity (41) is in communication with the outside world through the air guide channel.

6. The vent valve according to claim 1, characterized in that The movable core (2) is provided with a sealing groove (23) in the circumferential direction, and the valve body (1) is provided with a sealing cavity (17) that cooperates with the sealing groove (23); when the valve core is in the initial position, the sealing groove (23) and the sealing cavity (17) are in sealing cooperation; when the valve core is in the working position, the sealing groove (23) and the sealing cavity (17) are out of sealing cooperation.

7. The vent valve according to claim 1, characterized in that The guide ribs (13) are provided in three pieces, and the sawtooth grooves (21), the guide grooves (22), the limiting grooves (31) and the through grooves (32) are each provided in three pieces.

8. The vent valve according to any one of claims 1 to 7, characterized in that: A thread is provided on the side wall of the valve body (1) between the air inlet (11) and the air outlet (12), and the valve body (1) and the air vent are connected by threads.

9. A fuel filter, characterized in that: Comprising a vent valve as described in any one of claims 1-8.

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