Quick connector for hydrogen filling

Abstract

The utility model discloses a kind of quick couplings for hydrogen filling, it is related to hydrogen filling connector field, including quick male head and quick female head, the one end of quick female head is equipped with quick connector, the one end of quick male head is inserted in quick connector, airflow passage is equipped in quick male head, gas outlet is fixedly assembled in quick connector, gas outlet is equipped with gas outlet passage, the inner wall of quick male head is equipped with air passage groove, one end of air passage groove is communicated airflow passage, the other end is communicated gas outlet passage and is worn out quick male head, valve core is matched with clearance in gas outlet passage, valve core has the freedom of moving along gas outlet passage axial direction, first sealing ring is sleeved on valve core, when quick male head is separated from quick female head, first sealing ring contacts the inner wall of gas outlet passage and forms sealing;When quick male head is butted to quick female head, first sealing ring is separated from gas outlet and unseals, structure is simpler, safety is higher, reduces production manufacturing difficulty and cost.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen charging connectors, specifically a quick connector for hydrogen charging. Background Technology

[0002] In the end-use applications of hydrogen energy, frequent hydrogen charging and discharging are required. Given the flammability and explosiveness of hydrogen, high safety requirements are necessary. Therefore, a safe and reliable hydrogen charging and discharging connector is crucial and essential. Traditional quick-connect hydrogen charging connectors employ a complex structure with multiple stacked components to ensure sealing performance. This not only increases manufacturing difficulty and cost but also significantly raises the risk of failure due to the large number of parts and high assembly precision requirements. During use, these complex structures are prone to problems such as component jamming and wear, which in turn affect overall performance and safety. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a quick connector for hydrogen charging, thereby addressing the deficiencies of the prior art.

[0004] The purpose of this utility model is achieved through the following technical solution: a quick connector for hydrogen charging, comprising a male quick connector and a female quick connector. One end of the female quick connector has a quick-connect interface, and one end of the male quick connector is inserted into the quick-connect interface. The male quick connector has an airflow channel, and an outlet nozzle is fixedly installed inside the quick-connect interface. The outlet nozzle has an outlet channel. An air passage groove is formed on the inner wall of the male quick connector. One end of the air passage groove is connected to the airflow channel, and the other end extends out of the male quick connector and connects to the outlet channel. A valve core is fitted with the outlet channel with clearance. The valve core has the freedom to move axially along the outlet channel. A first sealing ring is fitted on the valve core. When the male quick connector is separated from the female quick connector, the first sealing ring contacts the inner wall of the outlet channel to form a seal. When the male quick connector is connected to the female quick connector, the first sealing ring separates from the outlet nozzle, releasing the seal.

[0005] Furthermore, both the valve core and the quick connector have a stepped structure. A spring is fitted on the valve core, and the spring is located below the first sealing ring. The end of the spring away from the valve core abuts against the stepped surface of the valve body of the quick connector. When the quick connector male and quick connector female are separated, the first sealing ring contacts the air outlet under the action of the spring to form a seal.

[0006] Furthermore, the valve core is coaxially connected to a push rod, which is in close contact with the air outlet channel. One end of the quick-connect male connector is connected to the quick-connect female connector and has a mating groove for the air outlet nozzle to pass through. A protrusion is fixed in the mating groove, and the push rod is located on the path of one end of the protrusion. The protrusion pushes the valve core downward to separate the first sealing ring from the air outlet nozzle.

[0007] Furthermore, the side wall of the air outlet is provided with an air outlet, which is connected to the air outlet channel. A second sealing ring is fitted on the push rod, and the second sealing ring contacts and seals with the push rod. The air outlet is located between the first sealing ring and the second sealing ring.

[0008] Furthermore, two third sealing rings are spaced apart along their own axial direction in the mating groove. When the quick-connect male connector is connected to the quick-connect female connector, the air outlet is located between the two third sealing rings, and the air outlet is connected to the air groove.

[0009] Furthermore, the quick-connect male connector has a threaded hole on its side wall, and the threaded hole is connected to an airflow channel.

[0010] Furthermore, the quick-connect male connector has a stop needle valve on its side wall. The stop needle valve includes a needle valve core, a connecting threaded sleeve, a movable threaded sleeve, and a handle. The quick-connect male connector has a stepped valve hole on its side wall. The stepped valve hole is vertically connected to the airflow channel. A connecting threaded sleeve is fixedly installed in the stepped valve hole. The needle valve core is threaded through the connecting threaded sleeve. The end of the needle valve core away from the quick-connect male connector is fixedly connected to the handle. The movable threaded sleeve is disposed in the handle and is loosely fitted onto the needle valve core.

[0011] The beneficial effects of this utility model are: 1. In the separated state, the first sealing ring on the valve core is tightly fitted to the inner wall of the gas outlet channel under the action of the spring, forming a highly efficient seal and preventing trace amounts of hydrogen leakage. When docking, the protrusion pushes the valve core down, and the first sealing ring quickly separates from the gas outlet, achieving rapid seal release and ensuring smooth gas flow. At this time, the gas outlet is located between the two third sealing rings, ensuring that no gas leaks to the outside, significantly improving the safety of the hydrogen charging process and reducing safety hazards.

[0012] 2. When connected, the seal of the quick-connect female connector is released, and the opening and closing of the airflow channel is manually controlled by the stop needle valve on the quick-connect male connector.

[0013] 3. The quick-connect male connector integrates a manual shut-off needle valve, so it can be connected to both an inflation source and a gas supply. The connection interface is threaded and can be customized according to the user.

[0014] 2. By abandoning the traditional complex structure of multiple stacked components, the number of parts is reduced, resulting in a simpler structure and lower manufacturing difficulty and cost. At the same time, assembly precision requirements are lowered, effectively avoiding component jamming and wear issues, and improving the reliability and stability of the quick connector. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a quick connector for hydrogen charging according to this utility model; Figure 2This is a schematic diagram of the structure of the quick-connect male connector in a quick-connect coupling for hydrogen filling according to this utility model; In the diagram, 1-quick-connect male connector, 2-quick-connect female connector, 3-airflow channel, 4-air outlet, 5-air outlet channel, 6-valve core, 7-first sealing ring, 8-spring, 9-push rod, 10-mating groove, 11-protrusion, 12-air outlet, 13-second sealing ring, 14-third sealing ring, 15-threaded hole, 18-needle valve core, 19-stepped valve hole, 20-movable threaded sleeve, 21-handle. Detailed Implementation

[0016] Example 1 like Figure 1 and Figure 2 As shown, a quick-connect coupling for hydrogen charging includes a male quick-connect coupling 1 and a female quick-connect coupling 2. One end of the female quick-connect coupling 2 has a quick-connect interface, and one end of the male quick-connect coupling 1 is inserted into the quick-connect interface. The male quick-connect coupling 1 has an airflow channel 3, and an outlet nozzle 4 is fixedly mounted inside the quick-connect interface. The outlet nozzle 4 has an outlet channel 5. An air passage groove is formed on the inner wall of the male quick-connect coupling 1. One end of the air passage groove connects to the airflow channel 3, and the other end extends out of the male quick-connect coupling 1 and connects to the outlet channel 5. A valve core 6 is fitted within the outlet channel 5 with a clearance fit. The valve core 6 has the freedom to move axially along the outlet channel 5. A first sealing ring 7 is fitted on the valve core 6. When the male quick-connect coupling 1 is separated from the female quick-connect coupling 2, the first sealing ring... 7. A seal is formed by contacting the inner wall of the gas outlet channel 5; when the quick-connect male connector 1 connects to the quick-connect female connector 2, the first sealing ring 7 separates from the gas outlet 4, releasing the seal; when the quick-connect male connector 1 and the quick-connect female connector 2 separate, the valve core 6 moves upward, causing the first sealing ring 7 to move into the gas outlet channel 5 of the gas outlet 4, thereby sealing the gas outlet 4. After connecting the quick-connect male connector 1 and the quick-connect female connector 2 together, the valve core 6 moves downward, causing the first sealing ring 7 to move out of the gas outlet channel 5, opening the gas outlet channel 5 of the gas outlet 4. Gas flows into the gas outlet channel 5 of the gas outlet 4 through the airflow channel 3 and the gas groove, and finally flows out from the gas outlet channel 5 to achieve hydrogen charging operation. The structure is simple and the operation is more convenient.

[0017] Furthermore, after the quick-connect male connector 1 and quick-connect female connector 2 are mated, a pin is inserted to connect the quick-connect male connector 1 and quick-connect female connector 2 together. The pin is located on the quick-connect male connector 1 and is screwed into the spiral groove of the quick-connect female connector 2 to complete the connection. The connection strength is higher, and it has the advantages of quick connection compared to the traditional threaded connection method.

[0018] Furthermore, the quick-connect male connector 1 has a threaded hole 15 on its side wall, which connects to the airflow channel 3. A shut-off needle valve is provided on the side wall of the quick-connect male connector 1. The shut-off needle valve includes a needle valve core 18, a connecting threaded sleeve 19, a movable threaded sleeve 20, and a handle 21. A stepped valve hole 19 is provided on the side wall of the quick-connect male connector 1, which vertically connects to the airflow channel 3. A connecting threaded sleeve 19 is fixedly installed inside the stepped valve hole 19. The needle valve core 18 is threaded through the connecting threaded sleeve 19. The end of the needle valve core 18 away from the quick-connect male connector 1 is fixedly connected to the handle 21. The movable threaded sleeve 20 is disposed inside the handle 21 and is loosely fitted onto the needle valve core 18. By rotating the handle 21, the needle valve core 18 can be screwed into or out of the quick-connect male connector 1, thereby controlling the airflow channel 3. The valve can cut off and open, and also adjust the opening size of the airflow channel 3 to adjust the charging and discharging rate. Various quick connectors / pipes are connected through the threaded hole 15. Hydrogen enters the airflow channel 3 through the threaded hole 15, then enters the outlet 12 through the gap between the quick male connector 1 and the quick female connector 2, then enters the outlet channel 5 through the outlet 12, and finally exits through the outlet channel 5, thus completing the rapid hydrogen charging. The hydrogen charging rate can be adjusted by adjusting the position of the needle valve core 19. When discharging, hydrogen enters the airflow channel 3 through the outlet channel 5 and finally exits from the threaded hole 15, completing the discharging operation. This releases the sealing state of the quick female connector in the connected state. The opening and closing of the airflow channel 3 is manually controlled by the cut-off needle valve on the quick male connector, realizing controllable charging and discharging.

[0019] Example 2 Based on Embodiment 1, both the valve core 6 and the quick-connect connector have a stepped structure. A spring 8 is fitted onto the valve core 6, located below the first sealing ring 7. The end of the spring 8 away from the valve core 6 rests against the stepped surface of the valve body of the quick-connect connector. When the quick-connect male connector 1 and quick-connect female connector 2 separate, the first sealing ring 7 contacts the air outlet 4 under the action of the spring 8 to form a seal. A push rod 9 is coaxially connected to the valve core 6, and the push rod 9 is clearance-fitted with the air outlet channel 5. The end of the quick-connect male connector 1 that mates with the quick-connect female connector 2 has a mating groove 10 for the air outlet 4 to pass through. A protrusion 11 is fixed inside the groove 10. The push rod 9 is located on one end of the path of the protrusion 11. The protrusion 11 pushes the valve core 6 downward to separate the first sealing ring 7 from the gas outlet 4. When the quick-connect male connector 1 is connected to the quick-connect female connector 2, the gas outlet 4 is inserted into the mating groove 10. That is, the push rod 9 moves close to the protrusion 11. The protrusion 11 will push the valve core 6 downward through the push rod 9. After the quick-connect male connector 1 and quick-connect female connector 2 are connected, the valve core 6 drives the first sealing ring 7 to disengage from the gas outlet channel 5, so that the gas outlet channel 5 is opened and hydrogen can enter smoothly.

[0020] Example 3 Based on Embodiment 2, the side wall of the gas outlet 4 is provided with a gas outlet 12, which is connected to the gas outlet channel 5. A second sealing ring 13 is fitted on the push rod 9, and the second sealing ring 13 contacts and seals with the push rod 9. The gas outlet 12 is located between the first sealing ring 7 and the second sealing ring 13. Two third sealing rings 14 are installed at intervals along their own axial direction in the mating groove 10. When the quick-connect male connector 1 is connected to the quick-connect female connector 2, the gas outlet 12 is located between the two third sealing rings 14, and the gas outlet 12 is connected to the gas groove. One of the third sealing rings 14 is located at the port position of the mating groove 10, so that when the connecting male connector 1 is connected to the connecting female connector 2, the gas outlet 4 can move between the two third sealing rings 14 in time. The two third sealing rings 14 abut against the outer wall of the gas outlet 4 to form a seal, ensuring that hydrogen does not leak. At this time, the gas groove is connected to the gas outlet 12, thereby connecting the gas flow channel 3 and the gas outlet channel 5, so that hydrogen filling and releasing operations can be performed.

Claims

1. A quick connector for hydrogen charging, characterized in that, The device includes a quick-connect male connector (1) and a quick-connect female connector (2). One end of the quick-connect female connector (2) has a quick-connect interface, and one end of the quick-connect male connector (1) is inserted into the quick-connect interface. The quick-connect male connector (1) has an airflow channel (3), and an air outlet (4) is fixedly installed inside the quick-connect interface. The air outlet (4) has an air outlet channel (5). The inner wall of the quick-connect male connector (1) has an air passage groove. One end of the air passage groove is connected to the airflow channel (3), and the other end extends out of the quick-connect male connector (1) and connects to... An air outlet channel (5) is provided with a valve core (6) fitted inside the air outlet channel (5) with a clearance. The valve core (6) has the freedom to move along the axial direction of the air outlet channel (5). A first sealing ring (7) is fitted on the valve core (6). When the quick-connect male connector (1) and the quick-connect female connector (2) are separated, the first sealing ring (7) contacts the inner wall of the air outlet channel (5) to form a seal. When the quick-connect male connector (1) is connected to the quick-connect female connector (2), the first sealing ring (7) separates from the air outlet (4) and releases the seal.

2. The quick connector for hydrogen charging according to claim 1, characterized in that, Both the valve core (6) and the quick connector are stepped structures. A spring (8) is fitted on the valve core (6). The spring (8) is located below the first sealing ring (7). The end of the spring (8) away from the valve core (6) abuts against the stepped surface of the valve body of the quick connector. When the quick connector male (1) and quick connector female (2) are separated, the first sealing ring (7) contacts the air outlet (4) to form a seal under the action of the spring (8).

3. The quick connector for hydrogen charging according to claim 2, characterized in that, The valve core (6) is coaxially connected to a push rod (9), which is in clearance fit with the air outlet channel (5). The quick-connect male connector (1) is connected to the quick-connect female connector (2) at one end, which is provided with a mating groove (10) for the air outlet nozzle (4) to pass through. A protrusion (11) is fixed in the mating groove (10). The push rod (9) is located on one end of the path of the protrusion (11). The valve core (6) is pushed downward by the protrusion (11) to separate the first sealing ring (7) from the air outlet nozzle (4).

4. A quick connector for hydrogen charging according to claim 3, characterized in that, The side wall of the air outlet (4) is provided with an air outlet (12), the air outlet (12) is connected to the air outlet channel (5), the push rod (9) is fitted with a second sealing ring (13), the second sealing ring (13) is in contact with the push rod (9) for sealing, and the air outlet (12) is located between the first sealing ring (7) and the second sealing ring (13).

5. A quick connector for hydrogen charging according to claim 4, characterized in that, Two third sealing rings (14) are installed at intervals along their own axial direction in the mating groove (10). When the quick-connect male (1) is connected to the quick-connect female (2), the air outlet (12) is located between the two third sealing rings (14) and the air outlet (12) is connected to the air groove.

6. A quick connector for hydrogen charging according to claim 1, characterized in that, The quick-connect male connector (1) has a threaded hole (15) on its side wall, and the threaded hole (15) is connected to the airflow channel (3).

7. A quick connector for hydrogen charging according to claim 1, characterized in that, The quick-connect male connector (1) has a stop needle valve on its side wall. The stop needle valve includes a needle valve core (18), a connecting threaded sleeve, a movable threaded sleeve (20), and a handle (21). The quick-connect male connector (1) has a stepped valve hole (19) on its side wall. The stepped valve hole (19) is vertically connected to the airflow channel (3). A connecting threaded sleeve is fixedly installed in the stepped valve hole (19). The needle valve core (18) is threaded through the connecting threaded sleeve. The end of the needle valve core (18) away from the quick-connect male connector (1) is fixedly connected to the handle (21). The movable threaded sleeve (20) is set in the handle (21) and is gapped on the needle valve core (18).

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