Handheld hydrogen leak detector

Abstract

The utility model provides a handheld hydrogen leak detector, which relates to the field of hydrogen leak detection equipment and comprises a probe, a filter joint and a miniature fan, the probe is fixedly connected to the air inlet end of a gooseneck, the filter joint is detachably mounted on the side wall of the detection end of the probe, and the miniature fan is fixedly mounted on the inner side of the filter joint. The air inlet end of the filter connector is connected with an isolation pad through threads, a filter screen is installed on the inner side of the isolation pad, and a transmission cleaning part is connected to the rotating axis of blades of the miniature fan through a connecting rod. Through the micro fan, air around a detection point can be blown to the probe or the cleaning brush is driven to rotate to automatically clean the filter screen under different states of forward rotation and reverse rotation of the micro motor, so that the detection point which is not easily and effectively touched by the probe can be detected, and residues of impurities such as dust on the filter screen can be effectively reduced; therefore, the detection effect and the service life of the sensor are maintained.

Description

Technical Field

[0001] This utility model relates to the technical field of hydrogen leak detection equipment, specifically a handheld hydrogen leak detector. Background Technology

[0002] Due to the flammable nature of hydrogen, handheld hydrogen leak detectors are frequently used during routine inspections of equipment and storage containers to prevent leaks and potential safety accidents. For example, CN209927373U discloses a portable hydrogen leak detector that uses a filter to remove impurities from the air, effectively preventing large particles from entering the equipment and causing damage, thus extending its lifespan. This multifunctional device draws in air through the air pump, which then passes through the filter, rapidly exchanging air with the existing air in the chamber. A sensor then detects the presence of hydrogen for quick detection. However, while this hydrogen leak detector uses an air pump to draw air into the device, the impurities adhering to the filter are difficult to clean. Over time, these impurities not only affect airflow efficiency but also cause impurities to fall from the filter and land on the sensor, impacting its detection performance and lifespan. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a handheld hydrogen leak detector. By using a miniature fan, the micro motor can blow air around the detection point toward the probe or drive a cleaning brush to automatically clean the filter screen when rotating in both forward and reverse directions. This not only allows for detection at points where the probe may not be easily accessible, but also effectively reduces the amount of dust and other impurities remaining on the filter screen, thereby maintaining the sensor's detection performance and lifespan.

[0004] Technical solution

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a handheld hydrogen leak detector, including a probe, a filter connector and a miniature fan. The probe is fixedly connected to the air inlet end of the gooseneck tube. The filter connector is detachably installed on the side wall of the probe detection end. The miniature fan is fixedly installed on the inner side of the filter connector. An isolation pad is threadedly connected to the air inlet end of the filter connector. A filter screen is installed on the inner side of the isolation pad. A transmission cleaning part is connected to the rotation axis of the miniature fan blade through a connecting rod.

[0006] The transmission cleaning unit includes a separation seat and a cleaning brush. The connecting rod is movably connected to the separation seat via a transmission gear, and the separation seat and the cleaning brush are movably connected via a drive disc. When the blades of the micro fan rotate clockwise, the cleaning brush does not rotate with the separation seat. When the blades of the micro fan rotate counterclockwise, the cleaning brush rotates with the separation seat.

[0007] Furthermore, a fixing bracket is fixedly connected to the side wall surface of the probe, and a locking block that mates with the fixing bracket is provided on the side wall of the filter connector.

[0008] Furthermore, the inner side of the fixed card holder is fixedly connected with a strip-shaped protrusion for increasing the squeezing force on the card block, and the surface of the strip-shaped protrusion is provided with an inclined surface at the connection end with the card block to guide the movement of the card block, and a rubber block is provided on the side of the card block facing the strip-shaped protrusion.

[0009] Furthermore, a limiting plate is provided on the inner side of the filter connector to limit the movement of the probe detection end, and a rubber sealing ring is installed between the connection surface of the filter connector and the probe.

[0010] Furthermore, an exhaust groove is provided on the side wall inside the filter connector, between the miniature fan and the limiting plate.

[0011] Furthermore, a ratchet tooth is provided on the inner side of the separator, and a pawl is embedded between the grooves of the ratchet tooth. The pawl is rotatably connected to the side wall edge of the drive disc via a rotating shaft.

[0012] Furthermore, the drive disc shaft is fixedly connected to the cleaning brush via a connecting shaft.

[0013] Furthermore, the detection end of the isolation pad is provided with several extension columns at equal intervals around it.

[0014] The beneficial effects of this utility model are as follows:

[0015] The miniature fan, when driving the blades clockwise, blows air from the filter connector towards the probe, creating negative pressure within the connector. This draws in air or leaked hydrogen from the connection point of the isolation pad, allowing it to enter the filter connector and probe for detection. When the fan rotates counter-clockwise, the transmission gear drives the separator and drive disc to activate the cleaning brush, cleaning the filter and blowing the removed dust outwards from the isolation pad. This facilitates cleaning the filter. Furthermore, both the isolation pad and the filter connector are detachable, allowing for manual cleaning of the filter and the fan blades, as well as wiping the probe's detection end. This reduces impurities remaining inside the filter connector and isolation pad, minimizing dust accumulation on the sensor and its impact on detection performance and lifespan. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a cross-sectional view of the filter connector of this utility model;

[0018] Figure 3 This is a schematic diagram of the connection structure between the separator and the transmission gear of this utility model;

[0019] Figure 4 This is a schematic diagram of the connection structure between the ratchet teeth and the pawl inside the separator of this utility model;

[0020] Figure 5 This is a schematic diagram of the strip-shaped protrusion structure of this utility model.

[0021] The components include: 1. Probe; 2. Filter connector; 3. Miniature fan; 4. Isolation pad; 5. Filter screen; 6. Separator; 7. Cleaning brush; 8. Transmission gear; 9. Drive disc; 10. Fixing bracket; 11. Locking block; 12. Strip protrusion; 13. Rubber block; 14. Limiting plate; 15. Rubber sealing ring; 16. Exhaust groove; 17. Ratchet tooth; 18. Pawl; 19. Extension column. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] See Figures 1-5 A handheld hydrogen leak detector includes a probe 1, a filter connector 2, and a miniature fan 3. The probe 1 is fixedly connected to the air inlet end of a gooseneck tube. The filter connector 2 is detachably installed on the side wall of the detection end of the probe 1. The miniature fan 3 is fixedly installed on the inner side of the filter connector 2. The air inlet end of the filter connector 2 is connected to an isolation pad 4 by a thread. A filter screen 5 is installed on the inner side of the isolation pad 4. The rotation axis of the fan blade of the miniature fan 3 is connected to a transmission cleaning part by a connecting rod.

[0024] The transmission cleaning unit includes a separation seat 6 and a cleaning brush 7. The connecting rod is movably connected to the separation seat 6 via a transmission gear 8, and the separation seat 6 and the cleaning brush 7 are movably connected via a drive disc 9. When the blades of the micro fan 3 rotate clockwise, the cleaning brush 7 does not rotate with the separation seat 6. When the blades of the micro fan 3 rotate counterclockwise, the cleaning brush 7 rotates with the separation seat 6.

[0025] In this solution: the filter screen 5 set inside the isolation pad 4 can filter particulate impurities in the air entering the filter connector 2, reducing the adhesion of impurities to the detection end of the probe 1, thereby maintaining the detection effect of the hydrogen sensor in the probe 1. The isolation pad 4 can be installed and removed from the filter connector 2, which makes it easy to separate the isolation pad 4 from the filter connector 2, and thus facilitates manual cleaning of the isolation pad 4, filter screen 5, cleaning brush 7, and fan blades of the micro fan 3.

[0026] When the miniature fan 3 drives the fan blades to rotate clockwise, it can create negative pressure inside the filter connector 2, causing the fan blades to rotate and generate suction to blow the air or leaked hydrogen around the detection point to the probe 1 for detection, so as to facilitate the detection of detection points that the probe 1 cannot fully touch. When the miniature fan 3 drives the fan blades to rotate counterclockwise, it will blow air to the outside of the filter connector 2 and the isolation pad 4, and at the same time drive the separation seat 6 and the cleaning brush 7 to rotate to clean the filter screen 5, so that the cleaned dust can be blown to the outside of the filter connector 2 or the isolation pad 4, reducing the residue of impurities on the filter screen 5.

[0027] Furthermore;

[0028] A fixing bracket 10 is fixedly connected to the side wall surface of the probe 1, and a locking block 11 that cooperates with the fixing bracket 10 is provided on the side wall of the filter connector 2.

[0029] In this embodiment, the installation and removal of the filter connector 2 from the probe 1 can be achieved by fixing the bracket 10 and the bracket 11. This facilitates the removal of the filter connector 2 from the probe 1 and cleaning of the detection end of the probe 1, reducing impurities remaining at the detection end of the probe 1, maintaining the accuracy and service life of the hydrogen sensor in the probe 1. Furthermore, after removing the filter connector 2 from the probe 1, the probe 1 can still perform detection in the previous way of contacting the detection point, increasing the flexibility and practicality of the probe 1 during the detection process.

[0030] The inner side of the fixed card holder 10 is fixedly connected with a strip-shaped protrusion 12 for increasing the squeezing force on the card block 11, and the surface of the strip-shaped protrusion 12 is provided with an inclined surface at the connection end with the card block 11 to guide the movement of the card block 11. A rubber block 13 is provided on the side of the card block 11 facing the strip-shaped protrusion 12.

[0031] In this embodiment: by setting a strip-shaped protrusion 12 in the fixed card seat 10 and setting an inclined surface on the strip-shaped protrusion 12 to guide the movement of the card block 11, the strip-shaped protrusion 12 can press against the rubber block 13 and the card block 11 after the card block 11 moves into the fixed card seat 10, thereby increasing the pressure of the fixed card seat 10 on the card block 11 and improving the stability of the card block 11 in the fixed card seat 10.

[0032] A limiting plate 14 is provided on the inner side of the filter connector 2 to limit the detection end of the probe 1, and a rubber sealing ring 15 is installed between the connection surface of the filter connector 2 and the probe 1.

[0033] In this embodiment: the limiting plate 14 provided inside the filter connector 2 can limit the position of the probe 1 in the filter connector 2, so that the locking block 11 can be rotated and connected to the fixed card seat 10. It should be noted that when the probe 1 abuts against the limiting plate 14, the position of the locking block 11 is aligned with the connection position of the fixed card seat 10, so that the locking block 11 can be accurately rotated and connected to the fixed card seat 10.

[0034] An exhaust groove 16 is provided on the side wall of the filter connector 2, which is located between the micro fan 3 and the limiting plate 14.

[0035] In this embodiment, the exhaust trough 16 can exhaust the air blown on the probe 1 when the micro fan 3 drives the blades to rotate clockwise, and introduce air into the filter connector 2 when the micro fan 3 drives the blades to rotate counterclockwise, so that the air in the filter connector 2 can flow, preventing the air blown on the probe 1 from not being able to be exhausted when the blades rotate clockwise or the blades from not being able to provide sufficient airflow to the filter screen 5 when the blades rotate counterclockwise.

[0036] The inner side of the separator 6 is provided with ratchet teeth 17, and a pawl 18 is embedded between the grooves of the ratchet teeth 17. The pawl 18 is rotatably connected to the side wall edge of the drive disc 9 via a rotating shaft.

[0037] In this embodiment: With the ratchet teeth 17 and pawl 18, when the fan blade rotates clockwise to blow air towards the probe 1, the pawl 18 will slide along the ratchet teeth 17 and will not be fixed between the teeth of the ratchet teeth 17, thus preventing the cleaning brush 7 from rotating and preventing the dust cleaned by the cleaning brush 7 from being blown to the detection end surface of the probe 1. When the fan blade rotates clockwise to blow air towards the filter 5, the pawl 18 will be pushed by the spring plate and stuck between the teeth of the ratchet teeth 17, so that the drive disk 9 drives the cleaning brush 7 to rotate to clean the filter 5 and blow out the cleaned dust, reducing the residue of impurities on the filter 5.

[0038] The drive disk 9 is fixedly connected to the shaft center via the connecting shaft cleaning brush 7.

[0039] In this embodiment, when the cleaning brush 7 rotates, it can rub against the surface of the filter screen 5 to remove impurities or dust attached to the filter screen 5, thereby reducing the residue of impurities on the filter screen 5. It should be noted that there can be two sets of cleaning brushes 7, which are respectively set on the two filter surfaces in front of and behind the filter screen 5, and the bristles of the cleaning brush 7 are in contact with the filter surface of the filter screen 5.

[0040] Several extension columns 19 are equidistantly arranged around the detection end of the isolation pad 4.

[0041] In this embodiment, the extension column 19 can increase the contact distance between the isolation pad 4 and the detection point. When there are impurities such as oil or water on the detection point, it can not only prevent the oil or water from directly adhering to the isolation pad 4 and contaminating or clogging the filter screen 5, but also maintain the air blowing efficiency to the probe 1 when the fan blade rotates clockwise.

[0042] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A handheld hydrogen leak detector, comprising a probe (1), a filter connector (2), and a miniature fan (3), wherein the probe (1) is fixedly connected to the inlet end of a gooseneck tube, the filter connector (2) is detachably installed on the side wall of the detection end of the probe (1), and the miniature fan (3) is fixedly installed on the inner side of the filter connector (2), characterized in that: The air inlet of the filter connector (2) is connected to the isolation pad (4) by a thread, and the filter screen (5) is installed on the inner side of the isolation pad (4). The rotating shaft of the micro fan (3) is connected to the transmission cleaning part by a connecting rod. The transmission cleaning unit includes a separation seat (6) and a cleaning brush (7). The connecting rod is movably connected to the separation seat (6) via a transmission gear (8). The separation seat (6) and the cleaning brush (7) are movably connected via a drive disc (9). When the blades of the micro fan (3) rotate clockwise, the cleaning brush (7) does not rotate with the separation seat (6). When the blades of the micro fan (3) rotate counterclockwise, the cleaning brush (7) rotates with the separation seat (6).

2. The handheld hydrogen leak detector according to claim 1, characterized in that: A fixing bracket (10) is fixedly connected to the side wall surface of the probe (1), and a locking block (11) that cooperates with the fixing bracket (10) is provided on the side wall of the filter connector (2).

3. A handheld hydrogen leak detector according to claim 2, characterized in that: The inner side of the fixed card holder (10) is fixedly connected with a strip protrusion (12) for increasing the squeezing force on the card block (11), and the surface of the strip protrusion (12) is provided with an inclined surface at the connection end with the card block (11) to guide the movement of the card block (11). A rubber block (13) is provided on the side of the card block (11) facing the strip protrusion (12).

4. A handheld hydrogen leak detector according to claim 2 or 3, characterized in that: A limiting plate (14) is provided on the inner side of the filter connector (2) to limit the detection end of the probe (1), and a rubber sealing ring (15) is installed between the connection surface of the filter connector (2) and the probe (1).

5. A handheld hydrogen leak detector according to claim 4, characterized in that: An exhaust groove (16) is provided on the side wall of the filter connector (2) between the micro fan (3) and the limiting plate (14).

6. A handheld hydrogen leak detector according to claim 1, characterized in that: The inner side of the separator (6) is provided with ratchet teeth (17), and a pawl (18) is embedded between the tooth grooves of the ratchet teeth (17). The pawl (18) is rotatably connected to the side wall edge of the drive disc (9) via a rotating shaft.

7. A handheld hydrogen leak detector according to claim 6, characterized in that: The drive disk (9) is fixedly connected to the cleaning brush (7) at its shaft center via a connecting shaft.

8. A handheld hydrogen leak detector according to claim 1, characterized in that: Several extension columns (19) are equidistantly arranged around the detection end of the isolation pad (4).

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