Oil leakage prevention sensor

Abstract

The utility model discloses an oil leakage prevention sensor, which belongs to the technical field of sensors and comprises a sensor head, the sensor head comprises a ball valve structure, the ball valve structure comprises a valve cavity, a valve core arranged in the valve cavity and an air channel communicated with the top of the valve cavity, and the sensor head is provided with an exhaust port and a moving path channel. The exhaust port, the moving path channel and the valve cavity are sequentially communicated, and a plurality of blocking pieces are arranged on the moving path channel to block oil liquid from flowing. The flow path is prolonged through the moving path channel, so that oil entering the exhaust port by mistake can be adhered, attached and blocked on the moving path channel, and the flowing of the oil is further blocked through the blocking piece, so that most of the oil is prevented from entering the valve cavity, the oil leakage condition is prevented, and the safety of the interior of a fuel system is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to an anti-oil-leakage sensor. Background Art

[0002] Fuel sensors are widely used in industrial fields such as automobiles and bullet trains to monitor and manage the liquid level and pressure of fuel systems. In the existing fuel sensor with a ball valve exhaust structure, a ball valve structure is provided at the sensor head. The ball valve structure has a valve cavity, an exhaust port communicating with the fuel tank is provided below the valve cavity, and a vent port communicating with the outside is provided above the valve cavity. When the air pressure in the fuel tank is too high, the gas is discharged to the outside through the exhaust port, the valve cavity and the vent port. When the liquid level in the fuel tank is too high or the fuel tank tilts or even capsizes, the floating ball in the valve core closes the vent port to prevent the oil in the fuel tank from leaking.

[0003] However, there is a key problem with the existing fuel sensor with a ball valve exhaust structure. That is, when the liquid level in the fuel tank is relatively high but does not reach the level where the floating ball closes the vent port, if the vehicle experiences severe vibration or shaking during driving, the oil may directly enter the valve cavity of the ball valve structure through the exhaust port and may leak to the outside through the vent port. This situation not only affects the efficiency and accuracy of the fuel system but also may cause the oil to overflow from the fuel tank, thus leading to potential safety hazards and environmental pollution problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an anti-oil-leakage sensor to solve the technical problem that oil is likely to flow into the ball valve structure from the exhaust port of the sensor and leak in the prior art.

[0005] With the above concept, the technical solution adopted by the utility model is as follows:

[0006] An anti-oil-leakage sensor, comprising:

[0007] A sensor head, including a ball valve structure. The ball valve structure includes a valve cavity, a valve core disposed in the valve cavity, and an air passage communicating with the top of the valve cavity. The sensor head is provided with an exhaust port and a moving path channel. The exhaust port, the moving path channel and the valve cavity are sequentially communicated. A plurality of blocking members are provided on the moving path channel to impede the flow of oil.

[0008] Preferably, in the direction from the exhaust port to the valve cavity, at least part of the flow area of the moving path channel gradually decreases first and then gradually increases.

[0009] Preferably, the sensor head further includes a pipeline installation joint, and at least part of the moving path channel is located between the outer walls of two adjacent pipeline installation joints.

[0010] Preferably, the exhaust port is arranged on the side of the sensor head, and at least part of the moving path channel extends in the horizontal direction.

[0011] Preferably, the blocking member is a blocking groove, the blocking groove is located at the top of the moving path channel, and a plurality of the blocking grooves are arranged at intervals along the extending direction of the moving path channel.

[0012] Preferably, from the exhaust port to the valve cavity direction, the bottom surface of at least part of the moving path channel gradually extends upwardly and obliquely.

[0013] Preferably, the blocking member is at least one of a blocking plate, a blocking protrusion or a blocking groove.

[0014] Preferably, at least two exhaust ports are arranged on the sensor head, and a moving path channel is formed between each exhaust port and the valve cavity.

[0015] Preferably, from the exhaust port to the valve cavity direction, the moving path channel extends in a zigzag manner.

[0016] Preferably, an air pipe is further included, and one end of the air channel away from the valve cavity is communicated with the air pipe.

[0017] Advantages of the present utility model:

[0018] For the anti-oil leakage sensor provided by the present utility model, the valve core can block the air channel when the liquid level is relatively high. When the valve core does not block the air channel, gas can flow along the exhaust port, the moving path channel, the valve cavity, and the air channel, so as to ensure the air pressure balance inside the fuel tank. By forming a moving path channel between the exhaust port and the valve cavity, the flow path between the exhaust port and the valve cavity is extended, so that the oil liquid that strays into the exhaust port cannot directly flow into the valve cavity, and needs to first pass through the moving path channel to enter the valve cavity. During the process of passing through the moving path channel, the oil liquid may be adhered, attached, or blocked on the moving path channel, so that most of the oil liquid can be prevented from entering the valve cavity; further, a blocking member is provided in the moving path channel to further hinder the flow of the oil liquid. Most of the oil liquid that enters the moving path channel will be blocked by the blocking member during the flowing process, so that most of the oil liquid is blocked from entering the valve cavity, preventing the occurrence of oil leakage and ensuring the safety inside the fuel system. Description of the drawings

[0019] Figure 1 is a schematic diagram of the overall structure of the anti-oil leakage sensor provided by an embodiment of the present utility model;

[0020] Figure 2 is a schematic diagram of a partial structure of the anti-oil leakage sensor provided by an embodiment of the present utility model;

[0021] Figure 3 is a cross-sectional view of the sensor head provided by an embodiment of the present utility model;

[0022] Figure 4 is a bottom view schematic diagram of the sensor head provided by an embodiment of the present utility model;

[0023] Figure 5 is a structural schematic diagram of the sensor head provided by an embodiment of the present utility model;

[0024] Figure 6 is a schematic diagram of the flow path of the oil fluid in the movement path channel provided by an embodiment of the present utility model.

[0025] In the figure:

[0026] 10. Sensor head; 11. Ball valve structure; 111. Valve cavity; 112. Valve core; 1121. Steel ball; 1122. Floating ball; 113. Air channel; 12. Exhaust port; 13. Movement path channel; 14. Blocking groove; 16. Pipeline installation joint; 17. Reinforcing rib; 18. Toothed ring;

[0027] 20. Pipeline. Detailed implementation manners

[0028] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as limiting the present utility model.

[0029] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0030] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0031] The technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and through specific embodiments.

[0032] See Figures 1 to 6 , an oil leakage prevention sensor is provided in an embodiment of the present utility model, which includes a sensor head 10. The sensor head 10 includes a ball valve structure 11. The ball valve structure 11 includes a valve cavity 111, a valve core 112 disposed in the valve cavity 111, and an air passage 113 communicating with the top of the valve cavity 111. The sensor head 10 is provided with an exhaust port 12 and a moving path passage 13. The exhaust port 12, the moving path passage 13 and the valve cavity 111 are communicated in sequence. A plurality of blocking members are provided on the moving path passage 13 to impede the flow of oil.

[0033] When the above oil leakage prevention sensor is in use, it is usually installed at the top of the fuel tank or at a position above the side of the fuel tank. The exhaust port 12 communicates with the fuel tank, and the air passage 113 communicates with the outside. The valve core 112 can block the air passage 113 when the liquid level is relatively high. Among them, the ball valve structure 11 is a conventional structure. The valve core 112 specifically includes a steel ball 1121 and a floating ball 1122. The floating ball 1122 is disposed above the steel ball 1121. When the liquid level in the fuel tank is relatively high and the floating ball 1122 floats up, the floating ball 1122 blocks the air passage 113. When the fuel tank is overturned, the steel ball 1121 squeezes the floating ball 1122 so that the floating ball 1122 blocks the air passage 113, thereby avoiding oil leakage.

[0034] When the valve core 112 does not block the air passage 113, gas can flow along the exhaust port 12, the moving path passage 13, the valve cavity 111, and the air passage 113. Specifically, when the air pressure in the fuel tank is too high, the gas flows along the direction of the exhaust port 12, the moving path passage 13, the valve cavity 111, and the air passage 113. When the air pressure in the fuel tank is too low, the gas flows along the direction of the air passage 113, the valve cavity 111, the moving path passage 13, and the exhaust port 12, thereby ensuring the air pressure balance inside the fuel tank.

[0035] By forming a moving path channel 13 between the exhaust port 12 and the valve cavity 111, direct contact between the exhaust port 12 and the ball valve structure 11 is avoided, the flow path is extended, and the oil that accidentally enters the exhaust port 12 cannot directly flow into the valve cavity 111. Instead, it needs to pass through the moving path channel 13 first before entering the valve cavity 111. During the process of passing through the moving path channel 13, the oil can be adhered to, attached to, and blocked on the moving path channel 13, thereby preventing most of the oil from entering the valve cavity 111. Further, a blocking member is provided in the moving path channel 13 to further impede the flow of the oil. Most of the oil that enters the moving path channel 13 will be blocked by the blocking member during the flow process, thus blocking most of the oil from entering the valve cavity 111 and preventing oil leakage, ensuring the safety inside the fuel system.

[0036] In addition, the air channel 113 can be connected to an air pipe (not shown in the figure). Specifically, one end of the air channel 113 away from the valve cavity 111 is connected to the air pipe. When oil accidentally enters the valve cavity 111, it needs to be guided through the air pipe to drain the oil from the air channel 113 to the ground or a safe location, thereby protecting the fuel system inside the valve cavity 111 from being damaged. Through the cooperation of the moving path channel 13, the blocking member, and the air pipe, oil leakage is maximally prevented, ensuring the safety inside the fuel system.

[0037] The blocking member is at least one of a blocking plate, a blocking protrusion, or a blocking groove, as long as it can play a blocking role. Since oil leakage mostly occurs when the fuel tank vibrates or shakes violently, the oil splashes into the exhaust port 12. The oil collides with the blocking member in the moving path channel 13, thereby reducing the speed or adhering, and avoiding flowing to the valve cavity 111. It can be understood that the setting of the blocking member does not affect the gas flow between the exhaust port 12, the valve cavity 111, and the air channel 113.

[0038] The exhaust port 12 can be provided at the bottom, side, or the junction of the bottom and side of the sensor head 10. In this embodiment, the exhaust port 12 is provided at the side of the sensor head 10, and at least part of the moving path channel 13 extends horizontally. Most of the oil splashes vertically. Therefore, setting the exhaust port 12 at the side of the sensor head 10 allows less oil to enter the exhaust port 12. At least part of the moving path channel 13 extends horizontally, which is not conducive to the flow of the oil and facilitates the arrangement of the blocking member.

[0039] Specifically, the exhaust port 12 is provided at the lower edge of the side of the sensor head 10. Optionally, the position of the exhaust port 12 is as far away from the valve cavity 111 as possible, extending the path between the exhaust port 12 and the valve cavity 111, further increasing the difficulty of the oil entering the valve cavity 111. Through the cooperation of the setting position of the exhaust port 12 and the blocking member, layers of obstacles are formed during the movement of the oil, thereby further eliminating the risk of oil leakage from the air passage 113 of the sensor head 10 during violent vibration; on the other hand, compared with the exhaust port 12 being provided on the bottom surface of the sensor head 10, by setting the exhaust port 12 on the side of the sensor head 10, the distance between the exhaust port 12 and the oil in the fuel tank is increased, thereby reducing the risk of oil entering the exhaust port 12 during the shaking process.

[0040] One exhaust port 12 can be provided, or two or more exhaust ports 12 can be provided. Specifically, at least two exhaust ports 12 are provided on the sensor head 10, and a moving path channel 13 is formed between each exhaust port 12 and the valve cavity 111. At least two exhaust ports 12 are designed, and there is a moving path channel 13 between each exhaust port 12 and the valve cavity 111, increasing the path for the discharge of the gas in the valve cavity 111, effectively improving the efficiency and speed of the exhaust of the sensor head 10, and being able to quickly and effectively discharge the gas inside the valve cavity 111 to ensure the normal operation and stability of the system. The design of one-to-one correspondence between the exhaust port 12 and the moving path channel 13 ensures the isolation and flow control between the exhaust port 12 and the valve cavity 111. The oil needs to pass through the blockage of the moving path channel 13 to prevent the oil from directly entering the valve cavity 111, thereby reducing the risk of oil leakage.

[0041] In this embodiment, the blocking member is a blocking groove 14, and the blocking groove 14 is located at the top of the moving path channel 13, and a plurality of blocking grooves 14 are arranged at intervals along the extending direction of the moving path channel 13. Usually, the oil splashes upward. After the oil enters the moving path channel 13, it is more likely to hit the top wall of the moving path channel 13. Therefore, setting the blocking groove 14 at the top of the moving path channel 13 is more convenient for blocking the oil. After the oil enters the blocking groove 14, its speed decreases and it falls to the bottom surface of the moving path channel 13, and basically does not continue to flow forward.

[0042] In the direction from the exhaust port 12 to the valve cavity 111, at least part of the bottom surface of the moving path channel 13 gradually extends upwardly and obliquely. It is convenient for the oil splashed into the moving path channel 13 to flow back in the direction of the exhaust port 12 after hitting the blocking member, so that the oil flows back into the fuel tank again, and the bottom surface of the moving path channel 13 plays a role in guiding the oil.

[0043] In the direction from the exhaust port 12 to the valve cavity 111, the movement path channel 13 can extend linearly, in a broken line, in a curve, or partly linearly and partly curvilinearly, without limitation here, as long as it can block the flow of the oil towards the valve cavity 111. In this embodiment, the movement path channel 13 extends tortuously in the direction from the exhaust port 12 to the valve cavity 111. The tortuously extending movement path channel 13 increases the movement path of the oil, slows down the flow rate, and also increases the chance of the oil being blocked during the flow process, further reducing the possibility of the oil entering the valve cavity 111, thereby effectively reducing the risk of oil leakage.

[0044] In this embodiment, in the direction from the exhaust port 12 to the valve cavity 111, the flow area of at least part of the movement path channel 13 gradually decreases first and then gradually increases. Gradually decreasing first can further serve the purpose of blocking the oil, causing the oil to collide with the side wall of the movement path channel 13 to prevent the oil from entering the valve cavity 111; gradually increasing later increases the exhaust space to ensure the exhaust efficiency.

[0045] Optionally, the movement path channel 13 that gradually decreases first and then gradually increases is formed by arranging blocking members. It can also be formed by leveraging the existing structure to form the movement path channel 13 that gradually decreases first and then gradually increases. Specifically, the sensor head 10 further includes a pipeline installation joint 16, and at least part of the movement path channel 13 is located between the outer walls of two adjacent pipeline installation joints 16. Figure 6 The arrows in it show the gas flow direction. The movement path channel 13 and the valve cavity 111 can be connected through one opening or multiple openings. The openings are arranged on the side wall of the valve cavity 111 and near the bottom, and the multiple openings can be arranged at intervals around the circumference of the valve cavity 111, that is, the movement path channel 13 is connected to the bottom of the side wall of the valve cavity 111.

[0046] The anti-oil-leakage sensor further includes a pipeline 20. The pipeline installation joint 16 is used to connect the pipeline 20, and the pipeline installation joint 16 and the pipeline 20 can be threadedly connected. The pipeline 20 is usually a round pipe, so the pipeline installation joint 16 is usually a circular interface. A gap is formed between two adjacent pipeline installation joints 16, and the gap is in the shape of being large at both ends and small in the middle. Therefore, in the direction from the exhaust port 12 to the valve cavity 111, the flow area of the movement path channel 13 gradually decreases first and then gradually increases.

[0047] In this embodiment, a plurality of reinforcing ribs 17 are arranged in the movement path channel 13. The arrangement of the reinforcing ribs 17 can increase the structural strength of the sensor head 10, enabling it to better withstand the internal pressure and external impact, and improving the durability and reliability of the sensor.

[0048] The blocking groove 14 is integrally formed with the sensor head 10, which is convenient for processing and production, enhances the structural stability and durability, reduces the number of components and assembly processes, and lowers the manufacturing cost. The reinforcing rib 17 can enclose the blocking groove 14; alternatively, at least two of the reinforcing rib 17, the side wall of the sensor head 10, and the outer wall of the pipeline installation joint 16 enclose to form the blocking groove 14. It can be formed by any two of them enclosing, or by all three enclosing to form the blocking groove 14, which is not limited here. By reasonably designing the reinforcing rib 17, the side wall of the sensor head 10, and the outer wall of the pipeline installation joint 16 to enclose the blocking groove 14, the space can be fully utilized, making the structure of the sensor head 10 more compact and reasonable.

[0049] Regarding the shape of the blocking groove 14, in this embodiment, at least part of the cross-section of the blocking groove 14 is triangular. The triangular blocking groove 14 can provide a stable framework through its own stable geometric characteristics, thereby improving the stability of the entire sensor head 10. In other embodiments, the blocking groove 14 can also be set as circular, rectangular, irregular shape, etc., which is not limited here.

[0050] The air passage 113 can extend linearly, in a zigzag, in a curve, or partially linearly and partially in a curve, which is not restricted here. In this embodiment, the air passage 113 extends in an L shape. The air passage 113 includes a horizontal section and a vertical section that are interconnected. The vertical section communicates with the valve cavity 111, and the horizontal section communicates with the outside. The air passage 113 extending in an L shape and being divided into a horizontal section and a vertical section allows the oil fluid guided by the air pipe to flow out from the horizontal section.

[0051] Among them, the sensor head 10 can be an integrally formed structure or a split structure. In this embodiment, the sensor head 10 includes a head body and a toothed ring 18. The toothed ring 18 covers the bottom of the head body and encloses a moving path channel 13 with the head body. The toothed ring 18 is an existing structure for installing with the fuel tank. The toothed ring 18 can increase the friction and gripping force between the sensor head 10 and the fuel tank, improve the installation stability of the sensor on the fuel tank, and reduce loosening or falling off caused by vibration or other factors during use.

[0052] The above embodiments only illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, there are various changes and modifications to the present invention, and these changes and modifications all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-leakage oil sensor, characterized in that: include: A sensor head (10) comprises a ball valve structure (11), wherein the ball valve structure (11) comprises a valve cavity (111), a valve core (112) disposed in the valve cavity (111), and an air passage (113) connected to the top of the valve cavity (111); the sensor head (10) is provided with an exhaust port (12) and a moving path passage (13); the exhaust port (12), the moving path passage (13) and the valve cavity (111) are connected in sequence; and a plurality of blocking members are provided on the moving path passage (13) to hinder the flow of oil.

2. The oil leakage prevention sensor according to claim 1, characterized in that: In the direction from the exhaust port (12) to the valve cavity (111), the flow area of ​​at least a portion of the moving path channel (13) first gradually decreases and then gradually increases.

3. The oil leakage prevention sensor according to claim 2, characterized in that: The sensor head (10) further comprises a pipeline installation joint (16), and at least a portion of the movement path channel (13) is located between outer walls of two adjacent pipeline installation joints (16).

4. The oil leakage prevention sensor according to claim 1, characterized in that: The exhaust port (12) is arranged on the side of the sensor head (10), and at least a portion of the moving path channel (13) extends in a horizontal direction.

5. The oil leakage prevention sensor according to claim 4, characterized in that: The blocking member is a blocking groove (14), the blocking groove (14) is located at the top of the moving path channel (13), and a plurality of the blocking grooves (14) are arranged at intervals along the extension direction of the moving path channel (13).

6. The oil leakage prevention sensor according to claim 4, characterized in that: From the exhaust port (12) to the valve cavity (111), at least a portion of the bottom surface of the moving path channel (13) gradually extends upwardly in an inclined manner.

7. The oil leakage prevention sensor according to claim 1, characterized in that: The blocking member is at least one of a blocking plate, a blocking protrusion or a blocking groove.

8. The oil leakage prevention sensor according to claim 1, characterized in that: The sensor head (10) is provided with at least two exhaust ports (12), and a moving path channel (13) is formed between each exhaust port (12) and the valve chamber (111).

9. The oil leakage prevention sensor according to claim 1, characterized in that: The moving path channel (13) extends in a zigzag manner from the exhaust port (12) to the valve chamber (111).

10. The oil leakage prevention sensor according to any one of claims 1 to 9, characterized in that: It also includes an air pipe, and one end of the air channel (113) away from the valve chamber (111) is connected to the air pipe.

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