A drain pipe with waterproof and foreign matter entry prevention function

Abstract

The utility model discloses a kind of discharge pipes with waterproof and foreign matter entering function, including discharge pipe body and waterproof and foreign matter subassembly being set on discharge pipe body;The inside of discharge pipe body is equipped with the gas flow passage of axial through, one end of gas flow passage is equipped as air inlet end, the other end of gas flow passage is equipped as air outlet end;Waterproof and foreign matter subassembly includes the end cap of fixed setting in air outlet end end, movable valve core is equipped in the inside of end cap, movable valve core is connected with end cap by spring. The utility model is through setting waterproof and foreign matter subassembly including spring connecting end cap and movable valve core, when gas is discharged, valve core is opened using airflow pressure, spring is automatically reset to realize sealing when discharging stops, effectively prevent blocking cap from falling off and block water, dust and other foreign matter from invading inside pipeline, solve the technical problem that traditional discharge pipe sealing failure risk is high, with the advantages of automatic reset sealing function and can effectively resist external environmental interference.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen fuel cell systems, and in particular to an emission pipe with waterproof and foreign object-proof functions. Background Technology

[0002] Currently, hydrogen emission pipes generally use simple waterproof structures such as plugs, which have significant functional defects: the airflow impact during exhaust can cause the plug to detach, requiring manual intervention to reposition it; when the emission pipe is installed on the vehicle roof or improperly positioned, external environmental factors (such as scratches from vegetation) can easily cause the plug to be permanently lost. More seriously, traditional solutions cannot effectively prevent rainwater, dust, and other foreign objects from entering the pipe, which may cause system corrosion or blockage malfunctions.

[0003] Existing technologies lack a reliable waterproof solution that can achieve both automatic resetting and sealing and resist external interference, resulting in the long-term risk of seal failure in hydrogen system emission pipes.

[0004] To address the aforementioned issues, existing technologies urgently need improvement. Utility Model Content

[0005] The purpose of this application is to provide a discharge pipe and its components that are waterproof and prevent foreign objects from entering, and have the advantages of automatic reset sealing function and effective resistance to external environmental interference.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A discharge pipe with waterproof and foreign object-proof functions includes a discharge pipe body and a waterproof and foreign object-proof component disposed on the discharge pipe body;

[0008] The interior of the discharge pipe body is provided with an axially penetrating gas flow channel, with one end of the gas flow channel being the inlet and the other end being the outlet.

[0009] The waterproof and foreign object-proof assembly includes an end cap fixedly installed at the end of the air outlet. Inside the end cap is a movable valve core that can move along the gas flow channel. The movable valve core is connected to the end cap by a spring.

[0010] A through-plate nut and a clamp are provided on the outer surface of the air inlet end of the exhaust pipe body. The exhaust pipe body is fixedly installed by the through-plate nut, and the gas flow channel is connected to the exhaust pipe through the clamp to introduce the gas to be discharged.

[0011] The exhaust pipe body has several exhaust openings at its outlet end. The exhaust openings are used to discharge the gas that needs to be discharged from the gas flow channel. The exhaust openings are evenly distributed along the outer surface of the outlet end of the exhaust pipe body, and the exhaust openings have a sloping structure for external water to enter the gas flow channel.

[0012] The inner end of the end cap is provided with an annular groove for limiting one end of the spring, and the movable valve core is provided with a receiving groove for accommodating the other end of the spring.

[0013] In summary, this utility model has the following beneficial effects:

[0014] By setting up a waterproof and foreign object-proof component that includes a spring-connected end cap and a movable valve core, the valve core is opened by the airflow pressure when gas is discharged, and the spring automatically resets to achieve a seal when the discharge stops. This effectively prevents the end cap from falling off and blocks water, dust and other foreign objects from entering the pipe. It solves the technical problem of high risk of sealing failure in traditional discharge pipes, and has the advantages of automatic reset sealing function and effective resistance to external environmental interference. Attached Figure Description

[0015] Figure 1 This is an assembly diagram of the waterproof and foreign object-proof discharge pipe described in this utility model.

[0016] Figure 2 This is an exploded view of the waterproof and foreign object-proof discharge pipe described in this utility model.

[0017] Figure 3 This is a schematic diagram of the discharge pipe body described in this utility model.

[0018] Figure 4 This is a schematic diagram of the end cap described in this utility model.

[0019] Figure 5 This is a schematic diagram of the movable valve core described in this utility model. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with the illustrations and specific embodiments.

[0021] In existing technologies, waterproofing solutions for hydrogen system emission pipes often employ plug structures. However, these plugs can be blown open after venting, requiring manual repositioning. Furthermore, when the emission pipe is located at the top or in an improper installation position, the plug is easily torn off by external objects, leading to failure. Such solutions cannot meet the requirements for long-term stable use, especially in scenarios involving vehicle movement or equipment vibration, where the risk of detachment increases significantly.

[0022] To address the aforementioned issues, the inventors noted two core shortcomings of traditional plug structures: a lack of dynamic sealing and a simplistic fixation method. By analyzing the pressure change characteristics during gas emission, they discovered that automatic sealing can be achieved by combining pneumatic actuation with elastic reset. Furthermore, to address the vulnerability of fixed structures to external forces, they proposed integrating the sealing component with the emission pipe body into a single structure, thus avoiding the risk of independent components detaching.

[0023] See Figures 1-5 This application proposes a discharge pipe with waterproof and foreign object prevention functions, including a discharge pipe body 1 and a waterproof and foreign object prevention component 2 disposed on the discharge pipe body 1; the discharge pipe body 1 has an axially penetrating gas flow channel 11 inside, one end of the gas flow channel 11 is designated as an air inlet 12, and the other end is designated as an air outlet 13; the waterproof and foreign object prevention component 2 includes an end cap 21 fixedly disposed at the end of the air outlet 13, and a movable valve core 22 that can move along the gas flow channel 11 is provided on the inner side of the end cap 21, and the movable valve core 22 is connected to the end cap 21 by a spring 23.

[0024] The discharge pipe body 1 is a hollow tubular structure with gas guiding function, and its axially penetrating gas flow channel 11 forms the main channel for gas discharge. The inlet end 12 and outlet end 13 correspond to the gas input and output directions, respectively, ensuring the directionality of the discharge path. The waterproof and foreign object-proof component 2 is a dynamic sealing mechanism installed at the outlet end 13, with the end cap 21 fixed to the end of the discharge pipe body 1 by means of threaded connection or other methods. The outer diameter of the movable valve core 22 is clearance-fitted with the inner wall of the gas flow channel 11, and it remains normally closed under the action of the spring 23. The spring 23 can be a stainless steel compression spring, and its elastic coefficient is determined according to the gas discharge pressure range.

[0025] Specifically, when gas enters the gas flow channel 11 through the inlet 12, the gas pressure acts on the end face of the movable valve core 22, pushing it to overcome the resistance of the spring 23 and move towards the end cover 21. The gas flow channel 11 is connected to the exhaust port 16. When the high-pressure gas is discharged through the exhaust port 16, the gas pressure drops, causing the spring 23 to push the movable valve core 22 back to its original position, thus resealing the gas flow channel 11. The fixed connection between the end cover 21 and the discharge pipe body 1 avoids the risk of component detachment. The axial movement path of the movable valve core 22 is guided by the inner wall of the gas flow channel 11, ensuring precise alignment of the sealing surface.

[0026] Compared with existing technologies, this application achieves an automatic reset function for the waterproof structure of the discharge pipe, immediately restoring the sealing state after gas discharge, effectively preventing water or foreign objects from reversing into the gas flow channel 11. The fixed connection between the end cap 21 and the discharge pipe body 1 completely eliminates the risk of component detachment, and the mating structure between the movable valve core 22 and the gas flow channel 11 ensures sealing reliability, making it suitable for applications such as vehicles and outdoor equipment where vibration or external interference exists.

[0027] This application further proposes to provide a through-plate nut 14 and a clamp 15 on the outer surface of the air inlet end 12 of the exhaust pipe body 1. The exhaust pipe body 1 is fixedly installed by the through-plate nut 14, and the gas flow channel 11 is connected to the exhaust pipe through the clamp 15 to introduce the gas to be discharged.

[0028] The through-plate nut 14 is a fastening component with external threads, which mechanically locks the exhaust pipe body 1 to the mounting plate through threaded engagement. Its function is to eliminate displacement of the exhaust pipe caused by vibration or external force through a rigid connection, ensuring installation stability. The compression fitting 15 achieves a seal at the pipe connection through compression deformation. Its function is to compensate for assembly errors between the exhaust pipe and the gas flow channel 11 using elastic deformation, forming a leak-free sealing interface.

[0029] Specifically, the through-plate nut 14 is fitted onto the outer surface of the air inlet end 12 of the exhaust pipe body 1. When the exhaust pipe body 1 passes through the mounting plate, the through-plate nut 14 and the mounting plate are axially fixed. The retaining sleeve 15 is fitted onto the inlet of the gas flow channel 11. When the exhaust pipe is inserted into the retaining sleeve 15, the inner conical surface of the retaining sleeve 15 is compressed and undergoes elastic deformation, tightly wrapping the outer wall of the exhaust pipe to form a radial seal. Through the combined effect of the mechanical locking of the through-plate nut 14 and the elastic sealing of the retaining sleeve 15, both the rigid fixation of the exhaust pipe body 1 on the mounting plate and the sealing reliability of the connection interface during gas introduction are achieved.

[0030] Through the above technical solution, this application solves the problems of gas leakage and pipe detachment caused by unstable installation of the discharge pipe. The rigid fixing function of the through-plate nut 14 effectively suppresses the displacement of the discharge pipe body 1 under vibration environment, and the elastic sealing characteristics of the ferrule 15 compensate for the assembly tolerance at the pipe connection. The combination of the two achieves a reliable sealed connection between the discharge pipe and the exhaust pipe, avoiding the risk of detachment and sealing failure caused by structural instability in traditional solutions.

[0031] This application further proposes that the outlet end 13 of the discharge pipe body 1 is provided with a plurality of exhaust openings 16. The exhaust openings 16 are used to discharge the gas to be discharged from the gas flow channel 11. The exhaust openings 16 are evenly distributed along the outer surface of the outlet end 13 of the discharge pipe body 1, and the exhaust openings 16 are provided with a sloping structure 17 for external water to enter the gas flow channel 11.

[0032] Among them, the exhaust opening 16 refers to the through hole set on the outer surface of the exhaust end 13 for gas discharge. Uniform distribution means that multiple exhaust openings 16 are arranged at equal intervals or symmetrically on the outer circumference of the exhaust end 13. Specifically, a ring array layout can be adopted to ensure that the gas discharge pressure is balanced in all directions. The inclined structure 17 refers to the inclined surface formed on the inner wall of the exhaust opening 16. Specifically, it can be achieved by a single-sided chamfer or a conical hole structure, so that the external water flow deviates from the inlet direction of the gas flow channel 11 along the inclined surface.

[0033] Specifically, during the gas emission process, the gas to be emitted is discharged outward through multiple evenly distributed exhaust openings 16. Because the openings are evenly distributed circumferentially, the flow resistance of the gas at the outlet end 13 tends to be uniform in all directions, avoiding the problem of increased back pressure in localized areas due to insufficient opening density. When external water comes into contact with the exhaust openings 16, the inclined structure 17 guides the water flow outward along the inclined surface, while the positive airflow generated by the gas emission further prevents water from entering the openings. For example, when a vehicle encounters rain during operation, water droplets impact the outer inclined surface of the exhaust opening 16 and slide down the inclined surface under the influence of gravity and airflow, unable to penetrate the gas flow channel 11 along the opening axis.

[0034] Through the above technical solution, this application effectively solves the problem of external water seeping into the gas flow channel 11 in the reverse direction through the exhaust opening 16, while ensuring that the pressure distribution in all directions is uniform during the gas emission process, and avoiding the decrease in emission efficiency or abnormal structural vibration caused by local airflow concentration.

[0035] This application further proposes that the inner end of the end cap 21 is provided with an annular groove 211 for one end of the limiting spring 23, and the movable valve core 22 is provided with a receiving groove 221 for accommodating the other end of the spring 23.

[0036] The annular groove 211 refers to the annular recessed structure located on the inner side of the end cap 21. This annular structure provides circumferential constraint to the end of the spring 23, preventing radial displacement of the spring 23 during compression or extension. The receiving groove 221 refers to the axial recessed area located on the movable valve core 22. The recessed sidewall limits the end of the spring 23, ensuring that the spring 23 and the movable valve core 22 maintain coaxial movement.

[0037] Specifically, when the pressure inside the gas flow channel 11 increases, the movable valve core 22 moves towards the end cover 21 under the thrust of the gas, compressing the spring 23. At this time, the circumferential limiting effect of the annular groove 211 prevents the end of the spring 23 from expanding outward, while the axial limiting effect of the receiving groove 221 prevents the other end of the spring 23 from detaching from the movable valve core 22. When the gas pressure disappears, the spring 23 rebounds and pushes the movable valve core 22 back to its original position. The mating structure of the annular groove 211 and the receiving groove 221 ensures that the spring 23 is always in a stable connection state, preventing the spring 23 from falling off due to vibration or external force.

[0038] Through the above technical solution, this application solves the problem that the spring 23 is prone to displacement or detachment during repeated movement, ensures the reliable operation of the automatic reset function of the movable valve core 22, reduces the maintenance requirements caused by the failure of the spring 23 connection, and extends the service life of the discharge pipe.

[0039] In this document, the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer", "vertical", and "horizontal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the purpose of clarifying the technical solution and for the convenience of description, and therefore should not be construed as limiting the present utility model.

[0040] In this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A discharge pipe with waterproof and foreign object-proof functions, characterized in that, It includes the discharge pipe body (1) and a waterproof and foreign object-proof component (2) installed on the discharge pipe body (1); The interior of the discharge pipe body (1) is provided with an axially penetrating gas flow channel (11), one end of the gas flow channel (11) is set as the air inlet (12), and the other end of the gas flow channel (11) is set as the air outlet (13). The waterproof and foreign object-proof assembly (2) includes an end cap (21) fixedly installed at the end of the air outlet (13). An active valve core (22) that can move along the gas flow channel (11) is provided on the inner side of the end cap (21). The active valve core (22) is connected to the end cap (21) by a spring (23).

2. The discharge pipe with waterproof and foreign object-proof functions according to claim 1, characterized in that, A through-plate nut (14) and a clamp (15) are provided on the outer surface of the air inlet end (12) of the exhaust pipe body (1). The exhaust pipe body (1) is fixedly installed by the through-plate nut (14), and the gas flow channel (11) is connected to the exhaust pipe through the clamp (15) to introduce the gas to be discharged.

3. The discharge pipe with waterproof and foreign object-proof functions according to claim 1, characterized in that, The outlet end (13) of the discharge pipe body (1) is provided with a plurality of exhaust openings (16). The exhaust openings (16) are used to discharge the gas to be discharged from the gas flow channel (11). The exhaust openings (16) are evenly distributed along the outer surface of the outlet end (13) of the discharge pipe body (1), and the exhaust openings (16) are provided with a sloping structure (17) for external water to enter the gas flow channel (11).

4. The discharge pipe with waterproof and foreign object-proof functions according to claim 1, characterized in that, The inner end of the end cap (21) is provided with an annular groove (211) for one end of the limiting spring (23), and the movable valve core (22) is provided with a receiving groove (221) for accommodating the other end of the spring (23).

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