A hydrogen concentration detection assembly and detection device

Abstract

The application discloses a hydrogen concentration detection assembly and a detection device, and belongs to the technical field of gas detection. The hydrogen concentration detection assembly comprises a fixed pipe and a filtering unit, a vacuum pump is arranged in the fixed pipe, a flow guide unit is internally provided with an airflow channel, a sensor is arranged in the airflow channel, an air inlet of the vacuum pump is communicated with the airflow channel, the filtering unit is internally provided with a filtering cavity communicated with the airflow channel, and a filtering membrane is arranged on an air inlet of the filtering cavity; the backflush unit comprises a backflush pipe in sliding connection with the flow guide unit, and the backflush pipe is connected with an output end of a driving source. The application sets the equidistant airflow channels, and arranges the arc-shaped flow guide plates in a circular array between the lower inner pipe and the lower outer pipe, so that the flow state of the to-be-detected gas is completely optimized, the turbulent turbulent gas can be rectified into the stable and uniform laminar gas, the high-speed turbulent flow is prevented from directly washing the sensor, the gas can flow through the sensor detection area at a uniform speed and stably, and the gas concentration data collected by the sensor is ensured to be continuous and stable.

Description

Technical Field

[0001] This invention relates to the field of gas detection technology, and more specifically, to a hydrogen concentration detection component and detection device. Background Technology

[0002] In numerous industrial applications such as hydrogen production, fuel cell applications, industrial exhaust gas monitoring, and new energy storage, accurate and stable detection of hydrogen concentration is crucial for ensuring safe equipment operation, controlling production conditions, and mitigating explosion risks. Hydrogen concentration detection devices rely on sensors to acquire and convert gas concentration signals. Their detection accuracy, operational stability, and lifespan directly determine the reliability of the entire monitoring system. Therefore, the airflow structure, sensor protection structure, and filtration and cleaning structure of the detection device are key technical aspects affecting hydrogen detection operations.

[0003] Existing hydrogen detection devices all incorporate internal filter membrane structures. During long-term detection, these membranes continuously trap impurities in the gas, especially in dusty environments, making them prone to pore blockage and filtration failure. Therefore, periodic cleaning with backflushing airflow is necessary. However, existing backflushing airflow paths are interconnected with the main airflow detection path. The high-pressure backflushing airflow must pass through the main channel's guiding and rectifying structures, which significantly impede and divert the backflushing airflow, resulting in high pressure loss and preventing rapid rinsing of the entire filter membrane. This leads to incomplete impurity removal and inadequate pore cleaning on the filter membrane surface. Over time, the filter membrane blockage problem worsens, ultimately causing the device's gas filtration and purification capabilities to fail. Impurities then enter the detection area with the gas, contaminating the sensor and further reducing detection accuracy. Therefore, this paper proposes a hydrogen concentration detection component and device. Summary of the Invention

[0004] The purpose of this invention is to provide a hydrogen concentration detection component and detection device to solve the technical problem in the prior art where the flow guiding mechanism affects the rinsing of the filter membrane, causing the filter membrane to become more clogged, thus achieving the desired technical effect.

[0005] This invention provides a hydrogen concentration detection component, including a fixed tube and a filter unit, which are connected by a connecting tube, and a vacuum pump is installed inside the fixed tube.

[0006] The flow guiding unit has an airflow channel inside. The sensor installed inside the connecting pipe is located in the airflow channel. The air inlet of the vacuum pump is connected to the airflow channel, and the air outlet is connected to the outside.

[0007] The filter unit is equipped with a filter chamber that communicates with the airflow channel, and a filter membrane is installed at the air inlet of the filter chamber.

[0008] The recoil unit includes a recoil tube that is slidably connected to the flow guiding unit, and the recoil tube is connected to the output end of the drive source;

[0009] The drive source drives the backflush tube to rise and fall, causing the vacuum pump's inlet to switch between the airflow channel and the backflush tube.

[0010] As a further description of the above technical solution, the filtration unit includes a support tube, a support block screwed onto the support tube, a filter membrane installed on the support block, and a lower partition plate installed inside the support tube. The support tube, the filter membrane, and the lower partition plate form a filtration chamber.

[0011] The support block has an air inlet hole, and the filter chamber is connected to the air inlet hole through a filter membrane.

[0012] As a further description of the above technical solution, the flow guiding unit includes a middle pipe, a lower outer pipe and an upper outer pipe. The lower inner pipe and the upper inner pipe are symmetrically installed at both ends of the middle pipe. An airflow channel is formed between the lower inner pipe and the lower outer pipe, between the middle pipe and the connecting pipe, and between the upper inner pipe and the upper outer pipe. Several flow guiding plates are provided between the lower inner pipe and the lower outer pipe.

[0013] As a further description of the above technical solution, the inner diameter of the lower outer tube gradually increases from bottom to top, the inner diameter of the upper outer tube gradually decreases from bottom to top, and the distance between the middle tube and the connecting tube, the distance between the lower inner tube and the lower outer tube, and the distance between the upper inner tube and the upper outer tube are equal.

[0014] As a further description of the above technical solution, a cleaning hole is provided at the top of the upper inner tube, and a cover plate is rotatably installed on the upper inner tube, with a torsion spring installed at the rotatable connection of the cover plate.

[0015] As a further description of the above technical solution, a protective rod is slidably installed on the intermediate tube, a protective groove is opened at the end of the protective rod near the sensor, and a first elastic element connected to the intermediate tube is installed on the protective rod.

[0016] A wedge is installed on the outer wall of the backflush tube.

[0017] As a further description of the above technical solution, a converter pipe is installed on the lower inner tube, and a converter hole communicating with the filter chamber is opened on the converter pipe.

[0018] An adjusting pipe is connected to the backflush pipe. The adjusting pipe is adapted to the converter pipe and has several adjusting holes.

[0019] As a further description of the above technical solution, a sealing plate is slidably installed at the bottom of the regulating tube. The sealing plate is located on the air inlet of the support block, and a second elastic element connected to the regulating tube is installed on the sealing plate.

[0020] As a further description of the above technical solution, the driving source includes a micro motor and a rack mounted on the recoil tube. The output end of the micro motor is connected to a drive shaft, which is rotatably connected to the fixed tube. A gear is mounted at its end, and the gear meshes with the rack for transmission.

[0021] This embodiment also discloses a hydrogen concentration detection device, including the above-mentioned hydrogen concentration detection component, as well as an alarm and a display. The alarm is used for detection and alarm, and the display is used for displaying the hydrogen concentration value.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0023] 1. This invention optimizes the flow state of the gas to be measured by setting equally spaced airflow channels and arranging arc-shaped guide plates in a circular array between the lower inner tube and the lower outer tube. This can rectify turbulent gas into stable and uniform laminar gas, preventing high-speed turbulence from directly impacting the sensor. It allows the gas to flow through the sensor detection area at a uniform speed and stably, ensuring that the gas concentration data collected by the sensor is continuous and stable. By avoiding detection errors caused by airflow disturbances at the airflow flow structure level, this invention effectively improves the accuracy and stability of hydrogen concentration detection.

[0024] 2. Under normal testing conditions, the first elastic element remains in its original state, causing the protective rod to retract. The sensor is exposed and can collect data normally without affecting the testing operation. During reverse purging or high-pressure backflushing cleaning, the wedge-shaped inclined surface presses against the protective rod as the backflushing pipe moves upward, overcoming the elastic force of the first elastic element and pushing the protective rod to slide. This allows the protective groove at the end of the protective rod to completely cover and seal the sensor, effectively isolating it from the high-speed, high-pressure purging airflow. This prevents the strong airflow from directly impacting and scouring the sensor probe, preventing problems such as sensor wear, stress damage, and decreased detection sensitivity. This structure can automatically switch protection during backflushing operations without manual operation, providing reliable protection for the core testing components throughout the process and significantly reducing sensor loss.

[0025] 3. This invention incorporates a backflush unit, forming an independent backflush airflow path for the filter membrane via a backflush pipe, regulating pipe, and converter pipe. When the backflush pipe moves upward to open the cleaning hole, the reverse high-pressure airflow from the vacuum pump can be directly introduced into the filter chamber through the backflush pipe, regulating hole, and converter hole, bypassing the main airflow channel where the guide plate is located, thus avoiding the obstruction effect of the guide plate on the backflush airflow. The high-pressure directional airflow can quickly flush the entire filter membrane, thoroughly removing dust, moisture, and various impurities trapped on the filter membrane surface, deeply cleaning the filter membrane pores, effectively ensuring the permeability of the filter membrane, avoiding problems such as filter membrane clogging and filtration failure, and continuously maintaining the gas filtration and purification capacity of the device. Attached Figure Description

[0026] Figure 1This is a schematic diagram of the overall structure of the detection device disclosed in a preferred embodiment of the present invention;

[0027] Figure 2 This is a cross-sectional view of a detection device disclosed in a preferred embodiment of the present invention;

[0028] Figure 3 The detection device disclosed in a preferred embodiment of the present invention Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 This is a schematic diagram of the guide plate distribution of the detection device disclosed in a preferred embodiment of the present invention;

[0030] Figure 5 The detection device disclosed in a preferred embodiment of the present invention Figure 2 Enlarged view at point B in the middle;

[0031] Figure 6 This is a schematic diagram of the drive source connection structure of the detection device disclosed in a preferred embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the protective rod connection structure of the detection device disclosed in a preferred embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of the backflush tube structure of the detection device disclosed in a preferred embodiment of the present invention;

[0034] Figure 9 This is a schematic diagram showing the location of the driving source of the detection device disclosed in a preferred embodiment of the present invention.

[0035] Explanation of the numbers in the diagram: 1. Fixed pipe; 11. Vacuum pump; 12. Upper partition; 13. Exhaust pipe; 14. Shaft pipe; 2. Detection unit; 21. Connecting pipe; 22. Sensor; 23. Flange; 3. Filter unit; 31. Support pipe; 311. Lower partition; 32. Support block; 33. Filter membrane; 34. Filter chamber; 35. Air inlet; 4. Flow guiding unit; 41. Intermediate pipe; 410. Guide pipe; 42. Lower outer pipe; 43. Upper outer pipe ; 44. Lower inner tube; 45. Guide plate; 46. Upper inner tube; 47. Exchanger tube; 471. Exchanger hole; 48. Cleaning hole; 49. Cover plate; 5. Protective rod; 51. Protective groove; 52. First elastic element; 6. Backflush unit; 61. Backflush tube; 62. Wedge; 63. Adjusting tube; 64. Adjusting hole; 7. Sealing plate; 71. Second elastic element; 8. Drive source; 81. Micro motor; 82. Rack; 83. Drive shaft; 84. Gear. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Reference Figures 1 to 9 This embodiment discloses a hydrogen concentration detection component and device, including a fixed tube 1, a detection unit 2, and a filter unit 3. A vacuum pump 11 and an upper partition 12 are fixedly installed inside the fixed tube 1. An exhaust pipe 13, connected to the outlet of the vacuum pump 11, is also fixedly installed inside the fixed tube 1. The exhaust pipe 13 is connected to the outside of the fixed tube 1, and a filter mechanism is provided at the opening of the exhaust pipe 13. The detection unit 2 includes a connecting pipe 21, which is fixedly installed at the bottom of the fixed tube 1 via a flange 23. Several sensors 22 are fixedly installed on the inner side of the connecting pipe 21 for detecting hydrogen concentration.

[0038] The filter unit 3 includes a support tube 31, a connecting tube 21 fixedly installed on the top of the support tube 31 via a flange 23, a support block 32 threadedly connected to the bottom of the support tube 31, a filter membrane 33 fixedly installed on the support block 32, and a lower partition 311 fixedly installed inside the support tube 31. The support tube 31, filter membrane 33, and lower partition 311 form a filter chamber 34. An air inlet 35 is provided at the bottom of the support block 32, and the filter chamber 34 is connected to the air inlet 35 through the filter membrane 33. When the vacuum pump 11 draws air, the gas enters through the air inlet 35, passes through the filter membrane 33 to filter impurities and water molecules, and then enters the filter chamber 34. It should be noted that the connection points of the flange 23 and the filter membrane 33 are sealed by sealing elements.

[0039] Reference Figures 2 to 6A flow guiding unit 4 is installed inside the support pipe 31. The flow guiding unit 4 includes a middle pipe 41, a lower outer pipe 42, and an upper outer pipe 43. The middle pipe 41 is positioned corresponding to and coaxial with the connecting pipe 21. The inner diameter of the connecting pipe 21 is larger than the outer diameter of the middle pipe 41. The lower outer pipe 42 is fixedly installed inside the support pipe 31, and the upper outer pipe 43 is fixedly installed inside the fixed pipe 1. The lower outer pipe 42 is an inverted frustum-shaped plate, and its inner diameter gradually increases from the bottom to the top. The upper outer pipe 43 is a frustum-shaped plate, and its inner diameter gradually decreases from the bottom to the top. The lower inner pipe 44 and the upper inner pipe 46 are symmetrically installed at both ends of the middle pipe 41. The lower inner pipe 44 is parallel to the lower outer pipe 42, and the upper inner pipe 46 and the upper outer pipe 43 are parallel. The distance between the middle pipe 41 and the connecting pipe 21, the distance between the lower inner pipe 44 and the lower outer pipe 42, and the distance between the upper inner pipe 46 and the upper outer pipe 43 are equal. An airflow channel is formed between the lower inner tube 44 and the lower outer tube 42, between the intermediate tube 41 and the connecting tube 21, and between the upper inner tube 46 and the upper outer tube 43. The bottom of the airflow channel is connected to the filter chamber 34, and the top of the airflow channel is connected to the air inlet of the vacuum pump 11. A circular array of guide plates 45 are distributed between the lower inner tube 44 and the lower outer tube 42. The guide plates 45 are arc-shaped and are used to rectify the turbulent gas into laminar gas, thereby improving the detection accuracy of the sensor 22 and avoiding direct impact of turbulent gas on the sensor 22.

[0040] A converter pipe 47 is fixedly installed on the lower inner tube 44, and a converter hole 471 communicating with the filter chamber 34 is opened on the converter pipe 47. A cleaning hole 48 is opened at the top of the upper inner tube 46, and a cover plate 49 is rotatably installed on the upper inner tube 46. A torsion spring is installed at the rotatable connection of the cover plate 49. The torsion spring is used to drive the cover plate 49 to block the cleaning hole 48. The elastic force of the torsion spring is stronger than the maximum negative pressure suction force of the vacuum pump 11, so as to prevent the cover plate 49 from rotating upward when the vacuum pump 11 is operating under negative pressure. Several guide tubes 410 are fixedly installed on the intermediate tube 41, and the position of the guide tubes 410 corresponds to the position of the sensor 22.

[0041] Reference Figure 2 , Figure 6 and Figure 7 A protective rod 5 is slidably installed inside the guide tube 410. A protective groove 51 is formed at the end of the protective rod 5 closest to the sensor 22. A sealing element is provided on the edge of the protective rod 5. When the protective rod 5 rests against the connecting tube 21, the sensor 22 is located within the protective groove 51, thus achieving sealed protection for the sensor 22. During backwashing by the vacuum pump 11, the impact of the impacting airflow on the sensor 22 is effectively reduced. A first elastic element 52 connected to the guide tube 410 is installed on the protective rod 5. The first elastic element 52 is used to move the protective rod 5 towards the center of the intermediate tube 41.

[0042] Reference Figure 2 , Figure 3 , Figure 7 and Figure 8A backflushing unit 6 is installed inside the intermediate tube 41. The backflushing unit 6 includes a backflushing pipe 61, which is adapted to the cleaning hole 48. The backflushing pipe 61 is slidably connected to the lower inner tube 44, and the backflushing pipe 61 is coaxial with the connecting pipe 21. A wedge block 62 is fixedly installed on the outer wall of the backflushing pipe 61. The first elastic element 52 drives the protective rod 5 to abut against the wedge block 62. An adjusting pipe 63 is connected to the backflushing pipe 61. The adjusting pipe 63 is adapted to the converter pipe 47, and the connection between the two is sealed by a sealing element. Several adjusting holes 64 are opened on the adjusting pipe 63.

[0043] A sealing plate 7 is slidably mounted on the bottom of the regulating pipe 63. The sealing plate 7 is located on the air inlet 35 of the support block 32 and is used to block the air inlet 35 when not in operation to prevent dust and other impurities from entering the device. A second elastic element 71 connected to the regulating pipe 63 is installed on the sealing plate 7. The second elastic element 71 is used to drive the sealing plate 7 to abut against the air inlet 35. It should be noted that the elastic force of the second elastic element 71 is less than the negative pressure suction force when the vacuum pump 11 is working normally, ensuring that the sealing plate 7 can be smoothly lifted and disengaged from the air inlet 35 when the vacuum pump 11 is drawing in air under negative pressure. The outer diameter of the sealing plate 7 is smaller than the outer diameter of the regulating pipe 63, reducing the difficulty of disassembling the support block 32 and facilitating the maintenance and replacement of the filter membrane 33.

[0044] When the backflush pipe 61 moves upward, the regulating pipe 63 will directly drive the sealing plate 7 to move upward, opening the air inlet 35. Therefore, when the detection device changes the detection point, the vacuum pump 11 first works in reverse, blowing air into the airflow channel from its air inlet. Then, the backflush pipe 61 drives the sealing plate 7 to move slightly upward, opening the air inlet 35, thus expelling the residual gas environment from the previous detection from the airflow channel and ensuring the accuracy of the detection.

[0045] As the backflush tube 61 continues to move upward, the protective rod 5 contacts the inclined surface of the wedge block 62. The protective rod 5 moves into the airflow channel and seals the sensor 22 through the protective groove 51. At this time, the power of the vacuum pump 11 can be increased, and the vacuum pump 11 blows air in reverse to increase the gas flow in the airflow channel, thereby improving the cleaning efficiency of dust or residual gas in the airflow channel.

[0046] Because the airflow channel is equipped with a guide plate 45, the guide plate 45 will seriously affect the airflow speed, resulting in an unsatisfactory backwashing effect of the filter membrane 33. At this time, the backwash pipe 61 continues to move upward, inserts into the cleaning hole 48 and begins to push the cover plate 49 to rotate. After the cover plate 49 is opened, the backwash pipe 61 moves upward to abut against the upper partition plate 12, realizing the connection between the air inlet of the vacuum pump 11 and the backwash pipe 61. At this time, the regulating hole 64 is connected to the exchange hole 471. When the vacuum pump 11 performs backwashing, the airflow enters the filter chamber 34 from the backwash pipe 61, through the regulating hole 64 and the exchange hole 471, thereby realizing rapid backwashing of the filter membrane 33 and improving the cleaning effect of the filter membrane 33.

[0047] Reference Figure 4 , Figure 6 and Figure 9 The recoil tube 61 is connected to the drive source 8, which includes a micro motor 81 mounted on the fixed tube 1 and a rack 82 fixedly mounted on the recoil tube 61. The rack 82 is parallel to the axis of the recoil tube 61, and the output end of the micro motor 81 is connected to a drive shaft 83. A shaft tube 14 is fixedly mounted on the fixed tube 1, penetrating the side wall of the airflow channel. The drive shaft 83 is supported and mounted inside the shaft tube 14, forming a rotational engagement. A gear 84 is fixedly mounted on the drive shaft 83, and the gear 84 meshes with the rack 82 for transmission. The output end of the micro motor 81 drives the gear 84 to rotate through the drive shaft 83, and the rack 82, which meshes with the gear 84, drives the recoil tube 61 to move up and down, thereby adjusting the position of the recoil tube 61 in different modes.

[0048] The detection device also includes an alarm and a display. The alarm is used to sound an alarm when the hydrogen concentration exceeds a set value, and the display is used to show the numerical value of the hydrogen concentration.

[0049] Working principle: Under normal standby conditions, the micro motor 81 is not started, the backflush tube 61 is in the lower position, and the second elastic element 71 drives the sealing plate 7 to tightly fit the air inlet 35 at the bottom of the support block 32, thereby sealing the air inlet 35. This can effectively prevent external dust and impurities from entering the device and causing structural blockage and pollution when it is stationary. At the same time, the first elastic element 52 remains in its original state, the protective rod 5 retracts, and the sensor 22 is in an exposed detection state.

[0050] When the device starts testing, the vacuum pump 11 begins to draw in air under positive negative pressure. Since the elastic force of the second elastic element 71 is less than the negative pressure suction force of the vacuum pump 11 during normal operation, the negative pressure suction force can overcome the elastic force of the second elastic element 71 and lift the sealing plate 7 upward, so that the air inlet 35 opens. The gas to be tested from the outside enters the filter chamber 34 through the air inlet 35. During the process of entering, the gas passes through the filter membrane 33 on the top of the support block 32 to complete the filtration and purification of impurities and water molecules, effectively removing interfering impurities in the gas to be tested, avoiding impurities from affecting the accuracy of subsequent testing and preventing impurities from entering the internal structure of the device and causing wear.

[0051] After being filtered, the pure gas enters the filter chamber 34 and flows into the equally spaced airflow channels formed by the lower inner tube 44 and the lower outer tube 42, the middle tube 41 and the connecting tube 21, and the upper inner tube 46 and the upper outer tube 43. The bottom of the airflow channels is connected to the filter chamber 34, and the top is connected to the air inlet of the vacuum pump 11, forming a complete airflow path. When the airflow passes through the area between the lower inner tube 44 and the lower outer tube 42, the circular array of arc-shaped guide plates 45 can rectify the turbulent gas into a stable laminar gas, preventing the turbulent gas from directly impacting the sensor 22 inside the connecting tube 21, which greatly improves the accuracy of hydrogen concentration detection by the sensor 22. The rectified gas continues to flow through the detection area of ​​the sensor 22, and the sensor 22 completes the hydrogen concentration acquisition and detection in real time. Finally, the gas is drawn in by the vacuum pump 11 and discharged to the outside of the fixed tube 1 through the exhaust pipe 13.

[0052] When the detection device needs to change the detection position and carry out the next area detection operation, in order to eliminate the interference of residual gas from the previous detection on the new detection results, the equipment switches to residual gas purging mode. At this time, the micro motor 81 starts and drives the gear 84 to rotate through the transmission shaft 83. Utilizing the meshing transmission between the gear 84 and the rack 82, the backflush pipe 61 is driven to move slowly upward along the axis. The backflush pipe 61 simultaneously drives the adjustment pipe 63 at the bottom and the sealing plate 7 to move upward, so that the originally blocked air inlet 35 is fully opened. At the same time, the vacuum pump 11 switches to reverse working state. The vacuum pump 11 draws in external gas through the exhaust pipe 13 and then sends the purging airflow into the airflow channel through the air inlet of the vacuum pump 11. The purging airflow can quickly carry out the hydrogen gas and trace impurities left in the airflow channel from the previous round of testing, eliminate the background interference caused by the residual gas in the channel, and ensure the authenticity and accuracy of the new detection data.

[0053] As the backflush tube 61 continues to move upward, the wedge 62 on the outer wall of the backflush tube 61 gradually contacts the end of the protective rod 5. The inclined surface of the wedge 62 presses against the protective rod 5, overcoming the elastic force of the first elastic element 52 and pushing the protective rod 5 along the guide tube 410 toward the sensor 22 until the protective groove 51 at the end of the protective rod 5 completely covers the sensor 22, achieving all-round sealing protection for the sensor 22. At this time, the reverse blowing power of the vacuum pump 11 can be increased to improve the airflow velocity in the airflow channel, quickly blowing away the dust and residual impurities attached to the airflow channel, while avoiding high-speed impact airflow from scouring and damaging the sensor 22. The pre-tightening elastic force of the torsion spring is greater than the maximum negative pressure suction of the vacuum pump 11, ensuring that the cover plate 49 continuously presses and seals the cleaning hole 48 at the top of the inner tube 46 during the blowing operation, preventing airflow from leaking and depressurizing from the cleaning hole 48, ensuring stable pressure and flow rate of the blowing airflow, and improving the overall cleaning effect. In this mode, it is mainly used to clean the airflow channel, the guide plate 45, and the filter chamber 34.

[0054] After the airflow channel and sensor 22 area are purged, the device enters the deep backwash cleaning mode of the filter membrane 33. The micro motor 81 continuously drives the backwash tube 61 to move upward, so that the top of the backwash tube 61 is aligned with and inserted into the cleaning hole 48 of the upper inner tube 46. The continuous upward thrust overcomes the torsion spring force and drives the cover plate 49 to rotate and open the cleaning hole 48 until the top of the backwash tube 61 abuts against the upper partition 12 in the fixed tube 1, realizing the connection between the air inlet of the vacuum pump 11 and the backwash tube 61. At this time, the regulating tube 63 on the backwash tube 61 moves synchronously, so that the regulating hole 64 on the regulating tube 63 is aligned with the exchange hole 471 on the exchange tube 47 and connected, and the seal at the connection between the two ensures that the passage is sealed and leak-free. At this time, the vacuum pump 11 maintains a reverse high-pressure blowing state. The high-pressure airflow is introduced into the filter chamber 34 through the backwash pipe 61, the regulating hole 64, and the exchange hole 471 in sequence, forming a reverse high-pressure airflow facing the filter membrane 33. This airflow can directly flush the dust, water molecules, and impurities trapped on the surface and in the pores of the filter membrane 33, effectively solving the problem of the guide plate 45 blocking the airflow and causing poor conventional backwash filtration effect. This significantly improves the cleaning efficiency and quality of the filter membrane 33, effectively avoids the filter membrane 33 from clogging and failure, and extends the service life of the filter membrane 33.

[0055] After a single backflushing cleaning operation is completed, the micro motor 81 reverses to drive the backflushing pipe 61 to move down and reset, the wedge block 62 disengages from the protective rod 5, the first elastic element 52 drives the protective rod 5 to reset and release the protection of the sensor 22, the torsion spring drives the cover plate 49 to automatically reset and seal the cleaning hole 48, the second elastic element 71 drives the sealing plate 7 to re-seal the air inlet 35, the device returns to the standby state, and can start a new round of hydrogen concentration detection operation at any time.

[0056] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A hydrogen concentration detection component, characterized in that: It includes a fixed tube (1) and a filter unit (3), which are connected by a connecting tube (21). A vacuum pump (11) is installed inside the fixed tube (1). The flow guiding unit (4) has an airflow channel inside. The sensor (22) installed inside the connecting pipe (21) is located inside the airflow channel. The air inlet of the vacuum pump (11) is connected to the airflow channel, and the air outlet is connected to the outside. The filter unit (3) is provided with a filter chamber (34) that is connected to the airflow channel, and a filter membrane (33) is installed at the air inlet of the filter chamber (34). The recoil unit (6) includes a recoil tube (61) that is slidably connected to the flow guiding unit (4), and the recoil tube (61) is connected to the output end of the drive source (8); The drive source (8) drives the backflush tube (61) to rise and fall, so that the air inlet of the vacuum pump (11) switches between the airflow channel and the backflush tube (61).

2. The hydrogen concentration detection component according to claim 1, characterized in that: The filter unit (3) includes a support tube (31), a support block (32) is screwed onto the support tube (31), a filter membrane (33) is installed on the support block (32), and a lower partition (311) is installed inside the support tube (31). The support tube (31), the filter membrane (33) and the lower partition (311) form a filter chamber (34). The support block (32) has an air inlet (35), and the filter chamber (34) is connected to the air inlet (35) through the filter membrane (33).

3. The hydrogen concentration detection component according to claim 2, characterized in that: The flow guiding unit (4) includes a middle pipe (41), a lower outer pipe (42) and an upper outer pipe (43). The two ends of the middle pipe (41) are symmetrically equipped with a lower inner pipe (44) and an upper inner pipe (46). The lower inner pipe (44) and the lower outer pipe (42), the middle pipe (41) and the connecting pipe (21) and the upper inner pipe (46) and the upper outer pipe (43) form an airflow channel. Several flow guiding plates (45) are provided between the lower inner pipe (44) and the lower outer pipe (42).

4. The hydrogen concentration detection component according to claim 3, characterized in that: The inner diameter of the lower outer tube (42) gradually increases from bottom to top, and the inner diameter of the upper outer tube (43) gradually decreases from bottom to top. The distance between the middle tube (41) and the connecting tube (21), the distance between the lower inner tube (44) and the lower outer tube (42), and the distance between the upper inner tube (46) and the upper outer tube (43) are equal.

5. The hydrogen concentration detection component according to claim 3, characterized in that: The top of the upper inner tube (46) is provided with a cleaning hole (48), and a cover plate (49) is rotatably installed on the upper inner tube (46). A torsion spring is installed at the rotatable connection of the cover plate (49).

6. The hydrogen concentration detection component according to claim 3, characterized in that: A protective rod (5) is slidably mounted on the intermediate tube (41). A protective groove (51) is provided at one end of the protective rod (5) near the sensor (22). A first elastic element (52) connected to the intermediate tube (41) is installed on the protective rod (5). A wedge (62) is installed on the outer wall of the backflush tube (61).

7. The hydrogen concentration detection component according to claim 3, characterized in that: The lower inner tube (44) is equipped with a converter tube (47), and the converter tube (47) has a converter hole (471) communicating with the filter chamber (34). An adjusting pipe (63) is connected to the backflush pipe (61). The adjusting pipe (63) is adapted to the converter pipe (47). Several adjusting holes (64) are opened on the adjusting pipe (63).

8. The hydrogen concentration detection component according to claim 7, characterized in that: A sealing plate (7) is slidably installed at the bottom of the regulating pipe (63). The sealing plate (7) is located on the air inlet (35) of the support block (32). A second elastic element (71) connected to the regulating pipe (63) is installed on the sealing plate (7).

9. The hydrogen concentration detection component according to claim 1, characterized in that: The drive source (8) includes a micro motor (81) and a rack (82) mounted on the recoil tube (61). The output end of the micro motor (81) is connected to a drive shaft (83). The drive shaft (83) is rotatably connected to the fixed tube (1). A gear (84) is mounted at its end. The gear (84) meshes with the rack (82) for transmission.

10. A hydrogen concentration detection device, comprising the hydrogen concentration detection component according to any one of claims 1-9, characterized in that: It also includes an alarm and a display; the alarm is used to detect alarms, and the display is used to show the hydrogen concentration value.

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