Hydrogen concentration detection device and detection method

Abstract

The invention relates to the technical field of gas detection, in particular to a hydrogen concentration detection device and method.The hydrogen concentration detection device comprises a hydrogen detector body, the hydrogen detector body is formed by combining a shell set, a display control set, a display cover set and an alarm, and a gas chamber assembly is arranged at the lower end of the hydrogen detector body. The overall structure of the gas chamber assembly is optimized, the gas conveying mechanism is designed in the gas conveying pipe, the gas jacking assembly is combined with the uniform distribution and diffusion assembly, input hydrogen is uniformly distributed, the situation that the local concentration is too high, the hydrogen makes full contact with multiple sets of sensors is avoided, and the concentration detection accuracy is improved; the device is simple in structure and convenient to use, detected hydrogen can be conveniently discharged, auxiliary backflushing cleaning of the surface of the sensor can be achieved by adjusting the gas input pressure, impurities accumulated in a gas chamber are removed, self-cleaning of sensing elements is achieved, the hydrogen concentration detection effect is guaranteed, and meanwhile the service life of the device is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of gas detection, and in particular to a hydrogen concentration detection device and a detection method. Background Art

[0002] Due to its colorless, odorless, flammable and explosive properties, hydrogen must meet extremely high safety standards in leak detection, especially in scenarios such as energy storage, chemical production and fuel cell vehicles. Hydrogen leaks may cause explosions or fires, posing not only a threat to personnel safety but also polluting the atmospheric environment. The gas chamber assembly of the hydrogen concentration detector is the core component, responsible for guiding the gas into the sensor and optimizing the detection environment. It introduces hydrogen from the environment into the gas chamber through natural diffusion or pumping to ensure that the gas is evenly distributed on the sensor surface.

[0003] In the prior art, such as a pump-suction gas detector with publication number CN219657611U, a baffle is provided inside the air chamber, the baffle is provided with air holes, and the air holes connect the air inlet and the air inlet channel, as well as the diffusion holes connecting the air inlet and the sensor module. The positions of the air holes and the air inlet are staggered, and the positions of the air holes and the diffusion holes of the sensor module are also staggered.

[0004] In order to solve the problem in the prior art that the pump-suction gas detector directly blows the sensor module, which affects the sensitivity, reproducibility and response time of the sensor module, the above document adopts a baffle method to solve the problem.

[0005] However, in actual use, the gas chamber structure design is simple, making it difficult to evenly diffuse the introduced hydrogen and achieve sufficient contact between the gas and the sensor element, affecting the accuracy of the concentration detection data; and the traditional gas chamber assembly lacks an effective sensor element protection mechanism. When the gas chamber assembly inhales high-concentration, high-pressure hydrogen, the pressure is not released in time, resulting in continuous pressure accumulation, which may cause the high-pressure gas to directly impact the sensor, affecting the hydrogen concentration detection accuracy of the detector or damaging the equipment.

[0006] Therefore, the present invention proposes a hydrogen concentration detection device and detection method to solve the problems of the existing gas chamber structure design being single, making it difficult to evenly diffuse the introduced hydrogen and achieve sufficient contact between the gas and the sensor element, affecting the accuracy of the concentration detection data, and lacking a protection mechanism for the sensor element. Summary of the Invention

[0007] In view of the deficiencies in the prior art, the present invention aims to provide a hydrogen concentration detection device and a detection method to solve the problems raised in the above background technology.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hydrogen concentration detection device, comprising a hydrogen detector body, the hydrogen detector body is composed of a shell group, a display control group, a display cover group and an alarm, the lower end of the hydrogen detector body is provided with a gas chamber assembly, the gas chamber assembly includes a gas pipe, an air inlet pipe, a threaded pipe and a gas storage ring plate, the upper end outer surface of the threaded pipe is threadedly connected to the bottom end of the shell group, the lower side outer ring surface of the threaded pipe is threadedly connected to the upper inner surface of the gas pipe, the lower end outer surface of the gas pipe is threadedly connected to the inlet The upper end of the air pipe is threadedly connected, and the lower end of the air inlet pipe is connected with an air inlet. A gas delivery mechanism is provided on the inner side of the gas delivery pipe, and the gas delivery mechanism includes an inner concave pipe platform, a gas lifting assembly and a uniform diffusion assembly. The uniform diffusion assembly includes a conical cover and an annular cover plate. A sensor is embedded and installed on the inner ring surface of the annular cover plate. A top plate is fixedly installed on the upper end of the annular cover plate. An exhaust mechanism is provided on the upper end of the top plate. The exhaust mechanism includes an exhaust elbow. The output end of the exhaust elbow passes through the inner wall of the gas delivery pipe and extends to the interior of the gas storage ring plate.

[0009] Preferably, a recessed pipe platform is fixedly connected to the inner side of the lower end of the gas pipe, and the recessed pipe platform is integrally formed with the gas pipe. The inner side of the recessed pipe platform is threadedly connected to a sealing base, and diffusion holes are evenly opened on the inner wall of the upper end of the sealing base, and a piston hole is opened on the inner wall of the lower end center of the sealing base.

[0010] Preferably, the gas lifting assembly includes a piston member and a driving member, the piston member includes a piston plate and a piston push rod, the driving member includes a center sleeve, the center sleeve is integrally formed by a horizontal plate and a vertical cylinder, and the outer surface of the vertical cylinder is fixedly connected to the inner wall of the upper end of the sealing base.

[0011] Preferably, the driving member also includes a driving gear, a driven gear ring and a fixed collar, the outer surface of the driving gear meshes and rotates with the outer surface of the driven gear ring, the central inner surface of the driven gear ring is fixedly connected to the lower end outer surface of the fixed collar, the inner annular surface of the fixed collar is movably connected to the outer surface of the center sleeve, and the upper end of the fixed collar is fixedly connected to a vane.

[0012] Preferably, the outer surface of the piston plate is adapted to be snap-fitted to the piston hole, the central inner surface of the piston plate is fixedly connected to the lower end of the piston top rod, a spring is provided on the sliding sleeve of the lower outer surface of the piston top rod, the lower end of the spring is fixedly connected to the upper surface of the piston plate, and the other end of the spring is fixedly connected to the lower surface of the vertical cylinder.

[0013] Preferably, the lower end of the conical cover is fixedly connected to the upper surface of the concave tube platform, and the conical cover consists of a lower conical cover and an upper conical cover. The inner surface of the lower conical cover is evenly installed with a guide fold plate 1, and the inner surface of the upper conical cover is evenly installed with a guide fold plate 2. A uniformly distributed orifice plate is fixedly installed between the upper and lower conical covers, and the central inner surface of the uniformly distributed orifice plate is movably connected to the outer surface of the fixed ring.

[0014] Preferably, the exhaust mechanism also includes an auxiliary exhaust pipe, a support ring plate and a recoil duct. The outer surface of the support ring plate is fixedly connected to the inner ring surface of the gas supply pipe, one end of the auxiliary exhaust pipe is connected to the inner wall of one side of the exhaust bend pipe, and the other end of the auxiliary exhaust pipe is fixedly connected to the inner ring surface of the support ring plate. The lower end of the auxiliary exhaust pipe is connected to the upper end of the recoil duct, and the other end of the recoil duct passes through the upper inner wall of the annular cover plate, and a one-way valve is provided on the inner side wall of the recoil duct.

[0015] Preferably, the lower end of the exhaust bend is fixedly connected to the upper surface of the top plate, and a fixing ring is fixedly installed on the inner surface of the exhaust bend. There are two groups of fixing rings, and a guide column is fixedly installed between the two groups of fixing rings. The outer surface of the guide column is slidably connected to a lifting block.

[0016] Preferably, the upper side sliding sleeve of the guide column is provided with a sleeve elastic wire, the upper end of the sleeve elastic wire is fixedly connected to the inner side of a group of fixing rings, the other end of the sleeve elastic wire is fixedly connected to the upper surface of the lifting block, a receiving groove is provided on the central inner wall of the lifting block, a swing plate is rotatably connected to the bottom surface of the inner cavity of the receiving groove, a supporting elastic wire is fixedly connected to the outer side of the swing plate, the other end of the supporting elastic wire is fixedly connected to the inner wall of the receiving groove, and an air intake side groove is provided on the inner wall of the lifting block close to the auxiliary exhaust pipe.

[0017] A method for detecting a hydrogen concentration detection device comprises the following steps:

[0018] Step 1: Gas introduction: Seal the external hydrogen discharge pipe and the input port of the gas chamber component to realize the input of hydrogen;

[0019] Step 2: Gas lifting and initial diffusion: The gas lifting component starts working, and hydrogen initially enters the gas pipeline for diffusion;

[0020] Step 3: Uniform diffusion and detection: The input hydrogen is evenly diffused through the gas lifting assembly and the uniform diffusion assembly. The sensor detects the concentration of the evenly diffused hydrogen and transmits the detected hydrogen concentration signal to the display control group of the hydrogen detector body. The display control group processes the signal and displays the hydrogen concentration value on the display cover group.

[0021] Step 4: Gas exhaust: After the test is completed, the exhaust mechanism starts working.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention proposes a hydrogen concentration detection device and detection method. By optimizing the overall structure of the gas chamber component, a gas transmission mechanism is designed inside the gas transmission pipe. The gas lifting component is combined with a uniform diffusion component to evenly distribute the input hydrogen, avoid excessive local concentration, fully contact multiple groups of sensors, and improve the accuracy of concentration detection. The exhaust mechanism is set to facilitate the discharge of hydrogen after detection, and the gas input pressure can be adjusted to achieve auxiliary recoil cleaning of the sensor surface, remove impurities accumulated in the gas chamber, and realize self-cleaning of the sensor element, thereby ensuring the hydrogen concentration detection effect and extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the three-dimensional disassembled structure of the present invention;

[0026] Figure 3 Schematic diagram of a half-section structure of the air chamber assembly of the present invention;

[0027] Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure at point A;

[0028] Figure 5 For the present invention Figure 4 A1 of the enlarged structural diagram;

[0029] Figure 6 For the present invention Figure 4 A2 of the enlarged structural diagram;

[0030] Figure 7 It is a schematic structural diagram of the disassembled state of the air chamber assembly of the present invention;

[0031] Figure 8 It is a schematic diagram of a partial cross-section structure of the air chamber assembly of the present invention in a disassembled state;

[0032] Figure 9 Schematic diagram of a half-section structure of the gas transmission pipe of the present invention;

[0033] Figure 10 For the present invention Figure 9 A schematic diagram of the enlarged structure at point B;

[0034] Figure 11It is a schematic diagram of the connection structure of the conical cover and the uniform diffusion component of the present invention;

[0035] Figure 12 This is a schematic diagram of the connection structure between the gas lifting assembly and the sealing base of the present invention;

[0036] Figure 13 This is a schematic diagram of the connection structure between the driving member and the sealing base of the present invention;

[0037] Figure 14 This is a schematic diagram of the connection structure between the exhaust mechanism and the annular cover plate of the present invention;

[0038] Figure 15 For the present invention Figure 14 Schematic diagram of the half-section structure;

[0039] Figure 16 For the present invention Figure 15 Enlarged structural diagram at C.

[0040] In the figure: 1. Hydrogen detector body; 11. Housing assembly; 12. Display control assembly; 13. Display cover assembly; 14. Alarm; 2. Gas chamber assembly; 21. Gas pipe; 211. Concave pipe platform; 212. Sealing base; 2120. Diffuser hole; 21201. Piston hole; 214. Piston plate; 215. Piston push rod; 2150. Limiting groove; 2151. Spring; 2141. Elastic connecting block; 2142. Deformable elastic wire; 213. Center sleeve; 2131. Driving gear; 2132. Driven gear ring; 2133. Fixed collar; 2134. Blade; 22. Inlet pipe; 221. Inlet port; 23. Threaded pipe; 231, mounting rib plate; 232, limiting rod; 2321, limiting protrusion; 24, air storage ring plate; 25, conical cover; 250, array rib plate; 251, guide fold plate 1; 252, guide fold plate 2; 253, uniformly distributed hole plate; 26, annular cover plate; 260, sensor; 261, top plate; 262, exhaust elbow; 2621, fixing ring; 2622, guide column; 26221, sleeve elastic wire; 2623, lifting block; 26230, air intake side groove; 26231, supporting elastic wire; 26232, swing plate; 263, auxiliary exhaust pipe; 264, support ring plate; 265, recoil duct. DETAILED DESCRIPTION

[0041] In order to clearly and completely describe the objectives and technical solutions of the present invention and make its advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] For example 1, please refer to Figure 1-16 The present invention provides a technical solution: a hydrogen concentration detection device, including a hydrogen detector body 1, the hydrogen detector body 1 is composed of a shell group 11, a display control group 12, a display cover group 13 and an alarm 14, the lower end of the hydrogen detector body 1 is provided with a gas chamber assembly 2, the gas chamber assembly 2 includes a gas pipe 21, an air inlet pipe 22, a threaded pipe 23 and a gas storage ring plate 24, the upper end outer surface of the threaded pipe 23 is threadedly connected to the bottom end of the shell group 11, the lower side outer ring surface of the threaded pipe 23 is threadedly connected to the upper inner surface of the gas pipe 21, the lower end outer surface of the gas pipe 21 is threadedly connected to the air inlet pipe 22 The upper end of the air inlet pipe 22 is threadedly connected, the lower end of the air inlet pipe 22 is connected with an air inlet 221, and a gas delivery mechanism is provided on the inner side of the air delivery pipe 21. The gas delivery mechanism includes an inner concave pipe platform 211, a gas lifting component and a uniform diffusion component. The uniform diffusion component includes a conical cover 25 and an annular cover plate 26. The inner ring surface of the annular cover plate 26 is embedded with a sensor 260. The upper end of the annular cover plate 26 is fixedly mounted with a top plate 261. The upper end of the top plate 261 is provided with an exhaust mechanism. The exhaust mechanism includes an exhaust elbow 262. The output end of the exhaust elbow 262 passes through the inner wall of the air delivery pipe 21 and extends to the interior of the gas storage ring plate 24.

[0043] In this embodiment, the upper outer surface of the threaded pipe 23 in the air chamber assembly 2 is threadedly connected to the bottom end of the shell group 11. This connection method not only ensures the stable connection between the air chamber assembly 2 and the hydrogen detector body 1, but also facilitates the assembly and disassembly of the device, and is convenient for maintenance and replacement of parts; hydrogen enters the air chamber assembly 2 from the air inlet 221 of the air inlet pipe 22, and inside the air chamber assembly 2, the gas jacking assembly in the gas pipe 21 starts to work to lift the hydrogen upward, and through the guidance and diffusion effect of the uniform diffusion assembly, the hydrogen is evenly distributed in the annular cover plate 26 area, and the inner ring surface of the annular cover plate 26 is embedded with a sensor 260. The sensor 260 can detect the concentration of the uniformly diffused hydrogen and convert the detected hydrogen concentration signal into an electrical signal. The electrical signal detected by the sensor 260 The signal is transmitted to the display control group 12 of the hydrogen detector body 1 through the line. The display control group 12 is the core processing unit of the entire device. It processes and analyzes the electrical signal transmitted by the sensor 260, and calculates the actual concentration value of the hydrogen. The processed hydrogen concentration value is transmitted to the display cover group 13. The display cover group 13 is usually equipped with a display screen, which can display the hydrogen concentration value intuitively, so that the operator can check the hydrogen concentration in real time. In the process of processing the signal, the display control group 12 will compare the detected hydrogen concentration value with the preset safety threshold. If the hydrogen concentration exceeds the preset safety threshold, the display control group 12 will immediately trigger the alarm 14, and the alarm 14 will send out an audible and visual alarm signal to remind the operator to take timely measures to prevent safety accidents.

[0044] Example 2, refer to the attached Figure 1-16, on the basis of embodiment 1, in order to achieve the initial diffusion of the introduced hydrogen in the gas pipe 21: the inner side of the lower end of the gas pipe 21 is fixedly connected with a concave pipe platform 211, the concave pipe platform 211 and the gas pipe 21 are integrally formed, the inner side of the concave pipe platform 211 is threadedly connected with a sealing base 212, the upper inner wall of the sealing base 212 is evenly provided with diffusion holes 2120, and the inner central wall of the lower end of the sealing base 212 is provided with a piston hole 21201; the gas lifting assembly includes a piston member and a driving member, the piston member includes a piston plate 214 and a piston push rod 215, the driving member includes a central sleeve 213, the central sleeve 213 is integrally formed by a horizontal plate and a vertical cylinder, the outer surface of the vertical cylinder is fixedly connected to the inner wall of the upper end of the sealing base 212; the inner annular surface of the threaded pipe 23 is fixedly installed with a mounting rib 231, and the lower end of the mounting rib 231 is fixedly connected to a limiting rod 232, which limits The inner surface of the positioning rod 232 is fixedly installed with a limiting protrusion 2321, and a limiting edge groove 2150 is provided on the inner wall of the upper end of the piston push rod 215, and the inner surface of the limiting edge groove 2150 is slidably connected to the outer surface of the driving gear 2131; by installing the rib plate 231 and cooperating with the limiting rod 232, it can provide a limiting effect on the lifting and lowering movement of the piston push rod 215, and at the same time, it can ensure the supporting strength of the threaded pipe 23; the driving member also includes a driving gear 2131, a driven gear ring 2132 and a fixed collar 2133, the outer surface of the driving gear 2131 meshes and rotates with the outer surface of the driven gear ring 2132, the central inner surface of the driven gear ring 2132 is fixedly connected to the outer surface of the lower end of the fixed collar 2133, the inner annular surface of the fixed collar 2133 is movably connected to the outer surface of the center sleeve 213, and the upper end of the fixed collar 2133 is fixedly connected with a vane 2134;

[0045] In this embodiment, when hydrogen enters from the air inlet 221, the gas below lifts the bottom of the piston plate 214, and the gas enters the inner side of the sealing base 212 through the gap between the alarm 14 and the piston hole 21201, and then diffuses upward through multiple groups of evenly opened diffusion holes 2120. The driving gear 2131 is controlled to open by the servo motor. In the open state, the driving gear 2131 and the driven gear ring 2132 engage with each other, thereby driving the fixed ring 2133 and the vane 2134 to rotate synchronously. At this time, the rotating vane 2134 sucks the gas, driving the hydrogen to flow to the upper layer. At this time, the hydrogen is initially diffused inside the gas pipe 21 and turbulence is achieved. The size of the opening of the piston hole 21201 can be achieved by adjusting the pressure of the gas input from below. It is worth noting that the central sleeve 213 here not only provides position limiting support for the fixed ring 2133, but also provides position limiting for the piston at the bottom.

[0046] Example 3, refer to the attached Figure 1-16On the basis of the second embodiment, in order to achieve the balance of the upward lifting of the piston member: the outer surface of the piston plate 214 is adapted to be clamped with the piston hole 21201, the central inner surface of the piston plate 214 is fixedly connected to the lower end of the piston push rod 215, and the sliding sleeve of the lower outer surface of the piston push rod 215 is provided with a spring 2151, the lower end of the spring 2151 is fixedly connected to the upper surface of the piston plate 214, and the other end of the spring 2151 is fixedly connected to the lower surface of the vertical cylinder; the inner side of the sealing base 212 is fixed to the piston plate 21 4, an elastic support member is provided between the upper sides thereof, and the elastic support member includes an elastic connecting block 2141 and a deformable elastic wire 2142. The lower ends of the elastic connecting block 2141 and the deformable elastic wire 2142 are respectively fixedly connected to the upper surface of the piston plate 214, and the end of the deformable elastic wire 2142 away from the piston plate 214 is fixedly connected to the inner side of the elastic connecting block 2141. The upper end of the elastic connecting block 2141 is fixedly connected to the inner surface of the sealing base 212, and the other end of the elastic connecting block 2141 is fixedly connected to the upper surface of the piston plate 214.

[0047] In this embodiment, when the gas pressure below is greater than the elastic force of the elastic support member and the spring 2151, the bottom of the piston plate 214 is lifted upward by the gas, and the piston plate 214 releases the blockage of the gap in the piston hole 21201. At this time, the elastic support member and the spring 2151 are squeezed from below and deformed. The combination of the array-distributed elastic connecting blocks 2141 and the deformable elastic wire 2142 can ensure the balanced state of the piston plate 214 during lifting and lowering, avoid tilting during lifting and lowering, and provide elastic force on the top of the piston plate 214 to avoid excessive gas pressure, which causes the piston plate 214 to collide with the bottom of the center sleeve 213. After the gas is no longer introduced from under the piston plate 214, the piston plate 214 is restored to its original position by the reflected elastic force of the elastic connecting block 2141, the deformable elastic wire 2142 and the spring 2151, thereby achieving the re-blocking of the piston hole 21201.

[0048] Example 4, refer to the attached Figure 1-16On the basis of the third embodiment, in order to achieve further uniform diffusion of hydrogen: the lower end of the conical cover 25 is fixedly connected to the upper surface of the inner concave tube platform 211, and an array rib 250 is fixedly installed on the outside of the conical cover 25. The array rib 250 is provided with multiple groups and arranged in a circular array about the central axis of the gas pipe 21, and the other side of the array rib 250 is fixedly connected to the inner annular surface of the gas pipe 21. The inner sides of adjacent array ribs 250 are filled with noise reduction cotton; the array ribs 250 arranged in an array can increase the uniformity of the conical cover 25. The strength of the conical cover 25 is improved, and the noise reduction cotton filled between adjacent array ribs 250 can absorb the noise of gas disturbance inside the conical cover 25, while at the same time reducing vibration; the conical cover 25 consists of a lower conical cover and an upper conical cover, the inner surface of the lower conical cover is evenly installed with a guide fold plate 1 251, the inner surface of the upper conical cover is evenly installed with a guide fold plate 252, and a uniformly distributed perforated plate 253 is fixedly installed between the upper and lower conical covers, and the central inner surface of the uniformly distributed perforated plate 253 is movably connected to the outer surface of the fixed collar 2133;

[0049] In this embodiment, guide fold plate 1 251 and guide fold plate 2 252 are arranged on the inner sides of the lower cone cover and the upper cone cover of the conical cover 25, which can centrally guide the airflow transmitted upward from the diffusion hole 2120. At the same time, the gas diffuses to the surroundings through the guide fold plate 252 on the inner side of the upper cone cover, thereby allowing the hydrogen to evenly contact the surface of the sensor 260 installed on the inner side of the annular cover plate 26, thereby improving the comprehensiveness of hydrogen concentration detection.

[0050] Example 5, refer to the attached Figure 1-16, on the basis of embodiment 4, in order to realize the discharge of hydrogen after detection, and to realize self-cleaning of the sensor 260 by discharging hydrogen: the exhaust mechanism also includes an auxiliary exhaust pipe 263, a support ring plate 264 and a recoil duct 265, the outer surface of the support ring plate 264 is fixedly connected to the inner ring surface of the gas supply pipe 21, one end of the auxiliary exhaust pipe 263 is connected through the inner wall of one side of the exhaust elbow 262, the other end of the auxiliary exhaust pipe 263 is fixedly connected to the inner ring surface of the support ring plate 264, the lower end of the auxiliary exhaust pipe 263 is connected through the upper end of the recoil duct 265, and the other end of the recoil duct 265 passes through the inner wall of the upper end of the annular cover plate 26, and a one-way valve is provided on the inner side wall of the recoil duct 265; the lower end of the exhaust elbow 262 is fixedly connected to the upper surface of the top plate 261, and the inner surface of the exhaust elbow 262 is fixedly installed with a fixed The ring 2621 is provided with two groups of fixed rings 2621, and a guide column 2622 is fixedly installed between the two groups of fixed rings 2621. The outer surface of the guide column 2622 is slidably connected to the lifting block 2623; the upper side of the guide column 2622 is slidably sleeved with a sleeve elastic wire 26221, the upper end of the sleeve elastic wire 26221 is fixedly connected to the inner side of a group of fixed rings 2621, and the other end of the sleeve elastic wire 26221 is fixedly connected to the upper surface of the lifting block 2623; a receiving groove is provided on the central inner wall of the lifting block 2623, and a swing piece 26232 is rotatably connected to the bottom surface of the inner cavity of the receiving groove. The outer side of the swing piece 26232 is fixedly connected to a supporting elastic wire 26231, and the other end of the supporting elastic wire 26231 is fixedly connected to the inner wall of the receiving groove. An air intake side groove 26230 is provided on the inner wall of the lifting block 2623 on the side close to the auxiliary exhaust pipe 263;

[0051] In this embodiment, the hydrogen is discharged by connecting multiple exhaust elbows 262 at the upper end of the top plate 261 and entering the gas storage ring plate 24 for storage. Figure 15-16As shown, under normal conditions, the detected hydrogen enters through the input port of the exhaust elbow 262. At this time, the gas passes through the center of the lifting block 2623 and finally flows out through the output end of the exhaust elbow 262. It should be noted that the gas pressure at this time is less than the elastic force of the sleeve elastic wire 26221, and the lifting block 2623 is in the lower position of the exhaust elbow 262. At this time, the air intake side groove 26230 is not connected to the auxiliary exhaust pipe 263; and when it is necessary to use the hydrogen to assist in cleaning the surface of the sensor 260, the gas pressure of the hydrogen entering the air inlet 221 is adjusted. When the gas pressure is large, the gas pressure at the bottom of the exhaust elbow 262 is large. At this time, the gas continues to push upward, and multiple groups of swing plates 26232 are affected by the gas. The swinging occurs, causing the central flow channel of the lifting block 2623 to decrease, and the lifting block 2623 to rise. At this time, the gas pressure is greater than the elastic force of the sleeve elastic wire 26221, and the sleeve elastic wire 26221 contracts. At this time, a certain amount of hydrogen enters the air intake groove 26230 on the side of the lifting block 2623, and a certain upward thrust is simultaneously applied to the lifting block 2623. Subsequently, the air intake groove 26230 is connected to the input end of the auxiliary exhaust pipe 263, so that the hydrogen is output through the auxiliary exhaust pipe 263 and the recoil duct 265. At this time, the output end of the recoil duct 265 is just opposite to the position of the sensor 260. In this way, the recoil effect of the high-pressure gas is used to achieve self-cleaning of the sensor 260, thereby extending the service life of the detection equipment.

[0052] Example 6

[0053] Refer to the attached Figure 1-16 Based on the fifth embodiment, the present invention further proposes a detection method of a hydrogen concentration detection device, comprising the following steps:

[0054] Step 1: Gas introduction: Seal the external hydrogen discharge pipe and the input port of the gas chamber component 2 to realize the input of hydrogen;

[0055] Step 2: Gas lifting and initial diffusion: The gas lifting component starts working, and hydrogen initially enters the gas pipe 21 for diffusion;

[0056] Step 3: Uniform diffusion and detection: The input hydrogen is evenly diffused through the gas lifting assembly and the uniform diffusion assembly. The sensor 260 detects the concentration of the evenly diffused hydrogen and transmits the detected hydrogen concentration signal to the display control group 12 of the hydrogen detector body 1. The display control group 12 processes the signal and displays the hydrogen concentration value on the display cover group 13.

[0057] Step 4: Gas exhaust: After the test is completed, the exhaust mechanism starts working.

[0058] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A hydrogen concentration detection device, comprising a hydrogen detector body (1), wherein the hydrogen detector body (1) is composed of a housing group (11), a display control group (12), a display cover group (13) and an alarm (14), and is characterized in that: The lower end of the hydrogen detector body (1) is provided with an air chamber assembly (2), and the air chamber assembly (2) includes an air delivery pipe (21), an air inlet pipe (22), a threaded pipe (23) and an air storage ring plate (24). The upper end outer surface of the threaded pipe (23) is threadedly connected to the bottom end of the shell group (11), the lower side outer ring surface of the threaded pipe (23) is threadedly connected to the upper side inner surface of the air delivery pipe (21), the lower end outer surface of the air delivery pipe (21) is threadedly connected to the upper end of the air inlet pipe (22), and the lower end of the air inlet pipe (22) is connected to the air inlet port (221). A gas delivery mechanism is provided on the inner side, the gas delivery mechanism comprising an inner concave pipe platform (211), a gas lifting assembly and a uniform diffusion assembly, the uniform diffusion assembly comprising a conical cover (25) and an annular cover plate (26), a sensor (260) being embedded and mounted on the inner ring surface of the annular cover plate (26), a top plate (261) being fixedly mounted on the upper end of the annular cover plate (26), an exhaust mechanism being provided on the upper end of the top plate (261), the exhaust mechanism comprising an exhaust elbow (262), the output end of the exhaust elbow (262) penetrating the inner wall of the gas delivery pipe (21) and extending to the interior of the gas storage ring plate (24).

2. A hydrogen concentration detection device according to claim 1, characterized in that: The inner side of the lower end of the gas delivery pipe (21) is fixedly connected to a concave pipe platform (211), the concave pipe platform (211) and the gas delivery pipe (21) are integrally formed, the inner side of the concave pipe platform (211) is threadedly connected to a sealing base (212), the upper inner wall of the sealing base (212) is evenly provided with diffusion holes (2120), and the lower center inner wall of the sealing base (212) is provided with a piston hole (21201).

3. A hydrogen concentration detection device according to claim 2, characterized in that: The gas lifting assembly includes a piston member and a driving member, the piston member includes a piston plate (214) and a piston push rod (215), the driving member includes a central sleeve (213), and the central sleeve (213) is integrally formed by a horizontal plate and a vertical cylinder, and the outer surface of the vertical cylinder is fixedly connected to the inner wall of the upper end of the sealing base (212).

4. A hydrogen concentration detection device according to claim 3, characterized in that: The driving member further comprises a driving gear (2131), a driven gear ring (2132) and a fixed collar (2133); the outer surface of the driving gear (2131) meshes and rotates with the outer surface of the driven gear ring (2132); the central inner surface of the driven gear ring (2132) is fixedly connected to the lower outer surface of the fixed collar (2133); the inner annular surface of the fixed collar (2133) is movably connected to the outer surface of the central sleeve (213); and the upper end of the fixed collar (2133) is fixedly connected to a blade (2134).

5. A hydrogen concentration detection device according to claim 3, characterized in that: The outer surface of the piston plate (214) is adapted to be snap-fitted to the piston hole (21201), the central inner surface of the piston plate (214) is fixedly connected to the lower end of the piston push rod (215), the lower outer surface of the piston push rod (215) is slidingly sleeved with a spring (2151), the lower end of the spring (2151) is fixedly connected to the upper surface of the piston plate (214), and the other end of the spring (2151) is fixedly connected to the lower surface of the vertical cylinder.

6. A hydrogen concentration detection device according to claim 1, characterized in that: The lower end of the conical cover (25) is fixedly connected to the upper surface of the concave tube platform (211), and the conical cover (25) consists of a lower conical cover and an upper conical cover. The inner surface of the lower conical cover is evenly installed with a guide fold plate 1 (251), and the inner surface of the upper conical cover is evenly installed with a guide fold plate 2 (252). A uniformly distributed orifice plate (253) is fixedly installed between the upper and lower conical covers, and the central inner surface of the uniformly distributed orifice plate (253) is movably connected to the outer surface of the fixed ring (2133).

7. A hydrogen concentration detection device according to claim 1, characterized in that: The exhaust mechanism further comprises an auxiliary exhaust pipe (263), a support ring plate (264) and a recoil duct (265); the outer surface of the support ring plate (264) is fixedly connected to the inner ring surface of the gas delivery pipe (21); one end of the auxiliary exhaust pipe (263) is connected to the inner wall of one side of the exhaust elbow (262); the other end of the auxiliary exhaust pipe (263) is fixedly connected to the inner ring surface of the support ring plate (264); the lower end of the auxiliary exhaust pipe (263) is connected to the upper end of the recoil duct (265); the other end of the recoil duct (265) passes through the inner wall of the upper end of the annular cover plate (26); and a one-way valve is provided on the inner side wall of the recoil duct (265).

8. A hydrogen concentration detection device according to claim 7, characterized in that: The lower end of the exhaust elbow (262) is fixedly connected to the upper surface of the top plate (261); a fixing ring (2621) is fixedly installed on the inner surface of the exhaust elbow (262); two groups of the fixing rings (2621) are provided, and a guide column (2622) is fixedly installed between the two groups of the fixing rings (2621); and a lifting block (2623) is slidably connected to the outer surface of the guide column (2622).

9. A hydrogen concentration detection device according to claim 8, characterized in that: The upper side of the guide column (2622) is slidably sleeved with a sleeve elastic wire (26221), the upper end of the sleeve elastic wire (26221) is fixedly connected to the inner side of a set of fixing rings (2621), the other end of the sleeve elastic wire (26221) is fixedly connected to the upper surface of the lifting block (2623), a receiving groove is provided on the central inner wall of the lifting block (2623), a swing plate (26232) is rotatably connected to the bottom surface of the inner cavity of the receiving groove, the outer side of the swing plate (26232) is fixedly connected to a supporting elastic wire (26231), the other end of the supporting elastic wire (26231) is fixedly connected to the inner wall of the receiving groove, and an air intake side groove (26230) is provided on the inner wall of the lifting block (2623) close to the auxiliary exhaust pipe (263).

10. A method for detecting a hydrogen concentration detection device, which is implemented based on the hydrogen concentration detection device according to any one of claims 1 to 9, characterized in that: The detection method of the hydrogen concentration detection device comprises the following steps: Step 1: Gas introduction: seal the external hydrogen discharge pipe to the input port of the gas chamber component (2) to achieve hydrogen input; Step 2: Gas lifting and initial diffusion: The gas lifting component starts working, and hydrogen initially enters the gas pipe (21) and diffuses; Step 3: Uniform diffusion and detection: The input hydrogen is uniformly diffused through the gas lifting assembly and the uniform diffusion assembly, the sensor (260) detects the concentration of the uniformly diffused hydrogen, and transmits the detected hydrogen concentration signal to the display control group (12) of the hydrogen detector body (1). The display control group (12) processes the signal and displays the hydrogen concentration value on the display cover group (13); Step 4: Gas exhaust: After the test is completed, the exhaust mechanism starts working.

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