Hydrogen concentration detection device and detection method

Abstract

The application relates to the technical field of gas detection, in particular to a hydrogen concentration detection device and a detection method, which comprise a hydrogen detector body, the hydrogen detector body is combined by a shell group, a display control group, a display cover group and an alarm group, 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, a gas conveying mechanism is designed in the inside of a gas conveying pipe, the input hydrogen is uniformly distributed by combining a gas jacking assembly and a uniform distribution assembly, local concentration is avoided from being too high, a plurality of sensors are fully contacted, the accuracy of concentration detection is improved, the set exhaust mechanism facilitates the discharge of the detected hydrogen, the input pressure of the gas can be adjusted to realize the auxiliary backflush cleaning of the surface of the sensor, impurities accumulated in the gas chamber are removed, the self-cleaning of the sensing element is realized, the hydrogen concentration detection effect is ensured, and the service life of the equipment is prolonged.

Description

TECHNICAL FIELD

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

[0002] Hydrogen, due to its colorless, odorless, flammable and explosive characteristics, needs to meet extremely high safety standards in leakage detection, especially in energy storage, chemical production and fuel cell vehicles, etc. Hydrogen leakage may cause explosion or fire, which not only threatens personnel safety, but also pollutes the atmospheric environment. The gas chamber assembly of the hydrogen concentration detector is a core component responsible for guiding gas into the sensor and optimizing the detection environment. Hydrogen in the environment is introduced into the gas chamber by natural diffusion or pumping to ensure uniform distribution of the gas to the sensor surface.

[0003] In the prior art, such as a pump suction type gas detector with publication number CN219657611U; a baffle is arranged inside the gas chamber, the baffle is provided with gas holes, and the gas holes are connected with the gas inlet and the gas passage and the diffusion holes connecting the gas inlet and the sensor module, the positions of the gas holes and the gas inlet are staggered, and the positions of the gas holes and the diffusion holes of the sensor module are also staggered.

[0004] The above document solves the problem that the pump suction type gas detector in the prior art directly blows gas to the sensor module, affecting the sensitivity, reproducibility and response time of the sensor module, by using a baffle.

[0005] However, in actual use, the gas chamber structure design is single, it is difficult to uniformly diffuse the imported hydrogen, to achieve full contact of the gas and the sensing element, affecting the accuracy of the concentration detection data; and the traditional gas chamber assembly lacks an effective sensing element protection mechanism. When the gas chamber assembly inhales high-concentration and high-pressure hydrogen, if the pressure is not released in time, the pressure will continue to accumulate, and then the high-pressure gas may directly impact the sensor, affecting the hydrogen concentration detection accuracy of the detector or damaging the equipment.

[0006] Therefore, the present application provides a hydrogen concentration detection device and method to solve the problems of single gas chamber structure design, difficulty in uniformly diffusing imported hydrogen, full contact of gas and sensing element, and lack of sensing element protection mechanism. SUMMARY

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

[0008] In order to achieve the above object, the present application provides the following technical scheme: a hydrogen concentration detection device, comprising a hydrogen detector body, the hydrogen detector body is combined by a shell group, a display control group, a display cover group and an alarm group, a gas chamber assembly is arranged at the lower end of the hydrogen detector body, the gas chamber assembly comprises a gas conveying pipe, an air inlet pipe, a threaded connecting pipe and a gas storage ring plate, the upper end outer surface of the threaded connecting pipe is threadedly connected with the bottom end of the shell group, the lower side outer surface of the threaded connecting pipe is threadedly connected with the upper side inner surface of the gas conveying pipe, the lower end outer surface of the gas conveying pipe is threadedly connected with the upper end of the air inlet pipe, the lower end of the air inlet pipe is connected with an air inlet, a gas conveying mechanism is arranged on the inner side of the gas conveying pipe, the gas conveying mechanism comprises an inner recessed pipe table, a gas lifting assembly and a uniform diffusion assembly, the uniform diffusion assembly comprises a conical cover and a ring cover plate, a sensor is embeddedly installed on the inner ring surface of the ring cover plate, a top plate is fixedly installed on the upper end of the ring cover plate, an exhaust mechanism is arranged on the upper end of the top plate, the exhaust mechanism comprises an exhaust elbow, the output end of the exhaust elbow penetrates the inner wall of the gas conveying pipe and extends to the inside of the gas storage ring plate.

[0009] Preferably, the lower end inner side of the gas conveying pipe is fixedly connected with an inner recessed pipe table, the inner recessed pipe table is integrally formed with the gas conveying pipe, the inner side of the inner recessed pipe table is threadedly connected with a sealing base, a plurality of diffusion holes are uniformly arranged on the upper end inner wall of the sealing base, and a piston hole is arranged on the lower end center inner wall of the sealing base.

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

[0011] Preferably, the driving part further comprises a driving gear, a driven gear ring and a fixed sleeve ring, the outer surface of the driving gear is engaged with the outer surface of the driven gear ring to rotate, the center inner surface of the driven gear ring is fixedly connected with the lower end outer surface of the fixed sleeve ring, the inner side ring surface of the fixed sleeve ring is movably connected with the outer surface of the center sleeve, and the upper end of the fixed sleeve ring is fixedly connected with a blade plate.

[0012] Preferably, the outer surface of the piston plate is adaptively clamped with the piston hole, the center inner surface of the piston plate is fixedly connected with the lower end of the piston top rod, the lower side outer surface of the piston top rod is slidably sleeved with a spring, the lower end of the spring is fixedly connected with the upper surface of the piston plate, and the other end of the spring is fixedly connected with the lower surface of the vertical cylinder body.

[0013] Preferably, the lower end of the conical cover is fixedly connected with the upper surface of the inner recessed tube table, the conical cover is composed of a lower conical cover and an upper conical cover, the inner side surface of the lower conical cover is uniformly provided with flow guide flaps one, the inner side surface of the upper conical cover is uniformly provided with flow guide flaps two, a uniformly distributed hole plate is fixedly installed between the upper conical cover and the lower conical cover, and the central inner surface of the uniformly distributed hole plate is movably connected with the outer surface of the fixed sleeve ring.

[0014] Preferably, the exhaust mechanism further comprises an auxiliary exhaust pipe, a support ring plate and a backflush guide pipe, the outer surface of the support ring plate is fixedly connected with the inner annular surface of the gas conveying pipe, one end of the auxiliary exhaust pipe is throughly connected with one side inner wall of the exhaust elbow, the other end of the auxiliary exhaust pipe is fixedly connected with the inner annular surface of the support ring plate, the lower end of the auxiliary exhaust pipe is throughly connected with the upper end of the backflush guide pipe, the other end of the backflush guide pipe penetrates the upper end inner wall of the annular cover plate, and a one-way valve is arranged on the inner side wall of the backflush guide pipe.

[0015] Preferably, the lower end of the exhaust elbow is fixedly connected with the upper surface of the top plate, the inner side surface of the exhaust elbow is fixedly provided with a fixed ring, the fixed ring is provided with two groups, a guide column is fixedly installed between the two groups of fixed rings, and the outer surface of the guide column is slidably connected with a lifting block.

[0016] Preferably, a sleeving elastic wire is sleeved on the upper side of the guide column, the upper end of the sleeving elastic wire is fixedly connected with the inner side of one group of fixed rings, the other end of the sleeving elastic wire is fixedly connected with the upper surface of the lifting block, a receiving groove is arranged on the central inner wall of the lifting block, a swing piece is rotatably connected with the inner cavity bottom surface of the receiving groove, a resisting elastic wire is fixedly connected with the outer side of the swing piece, the other end of the resisting elastic wire is fixedly connected with the inner wall of the receiving groove, and an air inlet edge groove is arranged on the inner wall of the side of the lifting block close to the auxiliary exhaust pipe.

[0017] A detection method of a hydrogen concentration detection device, comprising the following steps:

[0018] Step one, gas introduction: the external hydrogen discharge pipe is sealingly connected with the input port of the gas chamber assembly to realize hydrogen input;

[0019] Step two, gas lifting and preliminary diffusion: the gas lifting assembly starts to work, and hydrogen is preliminarily introduced into the inside of the gas conveying pipe for diffusion;

[0020] Step three, uniform diffusion and detection: the input hydrogen is uniformly diffused by the gas lifting assembly and the uniformly distributed diffusion assembly, the sensor detects the concentration of the uniformly diffused hydrogen, transmits the detected hydrogen concentration signal to the display control group of the hydrogen detector body, processes the signal and displays the hydrogen concentration value on the display cover group;

[0021] Step four, gas exhaust: after detection is completed, the exhaust mechanism starts to work.

[0022] Compared with the prior art, the hydrogen concentration detection device and the detection method have the beneficial effects that:

[0023] The hydrogen concentration detection device and the detection method have the beneficial effects that: the overall structure of the gas chamber assembly is optimized, the gas conveying mechanism is designed in the inside of the gas conveying pipe, the input hydrogen is uniformly distributed by the combination of the gas jacking assembly and the uniform distribution assembly, local concentration is avoided, full contact with multiple sensors is achieved, the accuracy of concentration detection is improved, the exhaust mechanism is arranged, the detected hydrogen is discharged, the auxiliary backflush cleaning of the sensor surface is realized by adjusting the gas input pressure, impurities accumulated in the gas chamber are removed, self-cleaning of the sensor element is realized, the hydrogen concentration detection effect is ensured, and the service life of the equipment is prolonged. BRIEF DESCRIPTION OF DRAWINGS

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

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

[0026] Figure 3 It is a semi-section structure schematic diagram of the gas chamber assembly of the present application;

[0027] Figure 4 It is an A place enlarged structure schematic diagram of the present application; Figure 3

[0028] Figure 5 It is an A1 place enlarged structure schematic diagram of the present application; Figure 4

[0029] Figure 6 It is an A2 place enlarged structure schematic diagram of the present application; Figure 4

[0030] Figure 7 It is a disassembly state structure schematic diagram of the gas chamber assembly of the present application;

[0031] Figure 8 It is a disassembly state local cross-section structure schematic diagram of the gas chamber assembly of the present application;

[0032] Figure 9 It is a semi-section structure schematic diagram of the gas conveying pipe of the present application;

[0033] Figure 10 It is an B place enlarged structure schematic diagram of the present application; Figure 9

[0034] Figure 11 ​​​​The connection structure diagram of the conical cover and the uniform distribution diffusion assembly of the present application;

[0035] Figure 12 The connection structure diagram of the gas lifting assembly and the sealing base of the present application;

[0036] Figure 13 The connection structure diagram of the driving member and the sealing base of the present application;

[0037] Figure 14 The connection structure diagram of the exhaust mechanism and the annular cover plate of the present application;

[0038] Figure 15 The half-section structure diagram of the present application Figure 14 ;

[0039] Figure 16 The C enlarged structure diagram of the present application Figure 15 ;

[0040] In the figure: 1, hydrogen detector body; 11, shell group; 12, display control group; 13, display cover group; 14, alarm; 2, gas chamber assembly; 21, gas conveying pipe; 211, inner recessed pipe table; 212, sealing base; 2120, diffusion hole; 21201, piston hole; 214, piston plate; 215, piston top rod; 2150, limiting edge slot; 2151, spring; 2141, elastic connecting block; 2142, deformation elastic wire; 213, center sleeve; 2131, driving gear; 2132, driven gear ring; 2133, fixed sleeve ring; 2134, leaf plate; 22, gas inlet pipe; 221, gas inlet; 23, threaded connecting pipe; 231, mounting rib plate; 232, limiting rod; 2321, limiting protrusion; 24, gas storage ring plate; 25, conical cover; 250, array rib plate; 251, flow guide flap one; 252, flow guide flap two; 253, uniform distribution hole plate; 26, annular cover plate; 260, sensor; 261, top plate; 262, exhaust elbow; 2621, fixed ring; 2622, guide column; 26221, sleeved elastic wire; 2623, lifting block; 26230, gas inlet edge slot; 26231, abutting elastic wire; 26232, swing piece; 263, auxiliary exhaust pipe; 264, support ring plate; 265, backflush guide pipe. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme of the present application, and the advantages more clearly, the following will be further described in detail with the help of the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the present application, not all the embodiments, only to explain the embodiments of the present application, and not for the limitation of the embodiments of the present application, all other embodiments obtained by the ordinary skilled in the art without doing creative work, belong to the scope of protection of the present application.

[0042] Embodiment one, please refer to Figures 1-16 The present application provides a technical scheme: a hydrogen concentration detection device, comprising a hydrogen detector body 1, the hydrogen detector body 1 is composed of shell group 11, display control group 12, display cover group 13 and alarm 14, the lower end of hydrogen detector body 1 is provided with gas chamber assembly 2, gas chamber assembly 2 includes gas pipe 21, inlet pipe 22, threaded pipe 23 and gas ring plate 24, the upper end of the outer surface of threaded pipe 23 is screwed with the bottom end of shell group 11, the lower side of the outer surface of threaded pipe 23 is screwed with the upper side of the inner surface of gas pipe 21, the lower end of the outer surface of gas pipe 21 is screwed with the upper end of inlet pipe 22, the lower end of inlet pipe 22 is connected with gas inlet 221, the inner side of gas pipe 21 is provided with gas conveying mechanism, gas conveying mechanism includes concave tube table 211, gas lifting assembly and uniform diffusion assembly, uniform diffusion assembly includes conical cover 25 and annular cover plate 26, the inner ring surface of annular cover plate 26 is embedded with sensor 260, the upper end of annular cover plate 26 is fixedly installed with top plate 261, the upper end of top plate 261 is provided with exhaust mechanism, exhaust mechanism includes exhaust elbow 262, the output end of exhaust elbow 262 penetrates the inner wall of gas pipe 21 and extends to the inside of gas ring plate 24;

[0043] In this embodiment, the outer surface of the upper end of the threaded connector 23 in the gas chamber assembly 2 is threadedly connected to the bottom end of the shell assembly 11. This connection not only ensures the stable connection of the gas chamber assembly 2 and the hydrogen detector body 1, but also facilitates the assembly and disassembly of the device, making it easy to maintain and replace parts. Hydrogen enters the gas chamber assembly 2 from the gas inlet 221 of the gas inlet pipe 22. Inside the gas chamber assembly 2, the gas lifting assembly in the gas delivery pipe 21 starts to work, lifting the hydrogen upwards. After the guiding and diffusing effect of the uniform diffusion assembly, the hydrogen is evenly distributed in the area of the annular cover plate 26. The sensor 260 is embedded and installed on the inner ring surface of the annular cover plate 26. The sensor 260 can detect the concentration of the uniformly diffused hydrogen and convert the detected hydrogen concentration signal into an electric signal. The electric signal detected by the sensor 260 is transmitted to the display control group 12 of the hydrogen detector body 1 through a wire. The display control group 12 is the core processing unit of the entire device. It processes and analyzes the electric signal transmitted by the sensor 260, calculates the actual concentration value of the hydrogen, and transmits the processed hydrogen concentration value to the display cover group 13. The display cover group 13 is usually equipped with a display screen, which can visually display the hydrogen concentration value, making it easy for the operator to check the hydrogen concentration in real time. During the signal processing process, the display control group 12 compares the detected hydrogen concentration value with the preset safety threshold value. If the hydrogen concentration exceeds the preset safety threshold value, the display control group 12 will immediately trigger the alarm 14, which will send out an audible and visual alarm signal to remind the operator to take timely measures to prevent safety accidents.

[0044] In the second embodiment, refer to the attached Figures 1-16On the basis of embodiment one, in order to realize the preliminary diffusion of the imported hydrogen in the gas conveying pipe 21: the inner side of the lower end of the gas conveying pipe 21 is fixedly connected with an inner recessed pipe table 211, the inner recessed pipe table 211 is integrally formed with the gas conveying pipe 21, the inner side of the inner recessed pipe table 211 is threadedly connected with a sealing base 212, the upper end inner wall of the sealing base 212 is uniformly provided with diffusion holes 2120, and the lower end center inner wall of the sealing base 212 is provided with a piston hole 21201; the gas lifting assembly comprises a piston and a driving part, the piston comprises a piston plate 214 and a piston top rod 215, the driving part comprises a center sleeve 213, the center sleeve 213 is integrally formed by a horizontal plate and a vertical cylinder, and the outer surface of the vertical cylinder is fixedly connected with the upper end inner wall of the sealing base 212; the inner side of the threaded connecting pipe 23 is fixedly installed with a mounting rib plate 231, the lower end of the mounting rib plate 231 is fixedly connected with a limiting rod 232, the inner surface of the limiting rod 232 is fixedly installed with a limiting protrusion 2321, the upper end inner wall of the piston top rod 215 is provided with a limiting edge groove 2150, and the inner surface of the limiting edge groove 2150 is slidably connected with the outer surface of the driving gear 2131; through the cooperation of the mounting rib plate 231 and the limiting rod 232, the limiting action can be provided for the lifting movement of the piston top rod 215, and at the same time, the supporting strength of the threaded connecting pipe 23 can be ensured; the driving part further comprises a driving gear 2131, a driven gear ring 2132 and a fixed sleeve ring 2133, the outer surface of the driving gear 2131 is in meshing rotation with the outer surface of the driven gear ring 2132, the center inner surface of the driven gear ring 2132 is fixedly connected with the lower end outer surface of the fixed sleeve ring 2133, the inner side of the fixed sleeve ring 2133 is movably connected with the outer surface of the center sleeve 213, and the upper end of the fixed sleeve ring 2133 is fixedly connected with a vane plate 2134;

[0045] In the embodiment, when the hydrogen enters from the gas inlet 221, the bottom of the piston plate 214 is lifted by the gas below, 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 the multiple groups of uniformly arranged diffusion holes 2120, the driving gear 2131 is controlled to be opened by the servo motor, in the opened state, the driving gear 2131 is in meshing rotation with the driven gear ring 2132, so as to drive the fixed sleeve ring 2133 and the vane plate 2134 to rotate synchronously, at this time, the rotating vane plate 2134 sucks the gas, drives the hydrogen to flow upward, at this time, the hydrogen is preliminarily diffused in the gas conveying pipe 21, and the turbulence is realized, and the opening size of the piston hole 21201 can be realized by adjusting the input gas pressure below, it is worth noting that the center sleeve 213 not only limits and supports the fixed sleeve ring 2133, but also limits the piston.

[0046] Embodiment three, refer to the attached Figures 1-16On the basis of Embodiment Two, in order to realize the balance of upward jacking of the piston piece: the outer surface of the piston plate 214 is adaptively connected with the piston hole 21201, the inner surface of the center of the piston plate 214 is fixedly connected with the lower end of the piston jacking rod 215, the lower outer surface of the piston jacking rod 215 is slidably sleeved with the spring 2151, the lower end of the spring 2151 is fixedly connected with the upper surface of the piston plate 214, and the other end of the spring 2151 is fixedly connected with the lower surface of the vertical cylinder; the inner side of the sealing base 212 and the upper side of the piston plate 214 are provided with an elastic supporting piece, the elastic supporting piece comprises an elastic connecting block 2141 and a deformed elastic wire 2142, the lower ends of the elastic connecting block 2141 and the deformed elastic wire 2142 are respectively fixedly connected with the upper surface of the piston plate 214, the end of the deformed elastic wire 2142 away from the piston plate 214 is fixedly connected with the inner side of the elastic connecting block 2141, the upper end of the elastic connecting block 2141 is fixedly connected with the inner side surface of the sealing base 212, and the other end of the elastic connecting block 2141 is fixedly connected with the upper surface of the piston plate 214;

[0047] In the embodiment, when the gas pressure below is greater than the elastic force of the elastic supporting piece and the spring 2151, the bottom of the piston plate 214 is jacked upward by the gas and moves upward, the piston plate 214 releases the blockage of the notch of the piston hole 21201, at this time, the elastic supporting piece and the spring 2151 are both deformed by being extruded from below, through the combination of the arrayed elastic connecting block 2141 and the deformed elastic wire 2142, the balance state of the piston plate 214 during lifting can be ensured, the inclination during lifting can be avoided, the elastic force can be provided to the top of the piston plate 214, the impact between the piston plate 214 and the bottom of the center sleeve 213 caused by excessive gas pressure can be avoided, and after the gas below the piston plate 214 is no longer introduced, the piston plate 214 is restored to the initial position by the counter-elastic force of the elastic connecting block 2141, the deformed elastic wire 2142 and the spring 2151, and the piston hole 21201 is re-blocked.

[0048] Embodiment Four, referring to the drawings Figures 1-16On the basis of Embodiment Three, in order to realize further uniform diffusion of hydrogen: the lower end of the conical cover 25 is fixedly connected with the upper surface of the inner recessed tube table 211, the outer side of the conical cover 25 is fixedly installed with array rib plates 250, the array rib plates 250 are arranged in multiple groups and circularly arranged about the central axis of the gas conveying pipe 21, and the other side of the array rib plates 250 is fixedly connected with the inner side of the gas conveying pipe 21, and the inner sides of adjacent array rib plates 250 are filled with noise reduction cotton; the array rib plates 250 arranged in an array can increase the strength of the conical cover 25, and the noise reduction cotton filled between adjacent array rib plates 250 can absorb the noise of the disturbance of the gas inside the conical cover 25, and at the same time weaken the vibration; the conical cover 25 is composed of a lower conical cover and an upper conical cover, the inner side surface of the lower conical cover is uniformly installed with flow guide flaps one 251, the inner side surface of the upper conical cover is uniformly installed with flow guide flaps two 252, and the uniformly distributed hole plate 253 is fixedly installed between the upper conical cover and the lower conical cover, and the central inner surface of the uniformly distributed hole plate 253 is movably connected with the outer surface of the fixed sleeve ring 2133;

[0049] In this embodiment, the flow guide flaps one 251 and the flow guide flaps two 252 are arranged inside the lower conical cover and the upper conical cover of the conical cover 25, which can concentrate and guide the gas flow transmitted upward by the diffusion holes 2120, and at the same time, the gas diffuses to the four directions through the flow guide flaps two 252 inside the upper conical cover, so that the hydrogen uniformly contacts the surface of the sensor 260 installed inside the annular cover plate 26, and the comprehensiveness of hydrogen concentration detection is improved.

[0050] Embodiment Five, refer to the attached Figures 1-16Based on Embodiment 4, in order to achieve the discharge of hydrogen after detection and to achieve self-cleaning of sensor 260 by discharging hydrogen: the exhaust mechanism also includes an auxiliary exhaust pipe 263, a support ring plate 264, and a backflushing conduit 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 to the inner wall of one side of the exhaust bend 262, and 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 backflushing conduit 265, and the other end of the backflushing conduit 265 penetrates the upper inner wall of the annular cover plate 26. A one-way valve is provided on the inner side wall of the backflushing conduit 265. The lower end of the exhaust bend 262 is fixedly connected to the upper surface of the top plate 261, and a fixing device is fixedly installed on the inner surface of the exhaust bend 262. Two sets of fixed rings 2621 are provided, and a guide post 2622 is fixedly installed between the two sets of fixed rings 2621. A lifting block 2623 is slidably connected to the outer surface of the guide post 2622. A sleeve spring wire 26221 is slidably sleeved on the upper side of the guide post 2622. The upper end of the sleeve spring wire 26221 is fixedly connected to the inner side of a set of fixed rings 2621, and the other end of the sleeve spring wire 26221 is fixedly connected to the upper surface of the lifting block 2623. A receiving groove is opened on the inner wall of the center of the lifting block 2623. A swing plate 26232 is rotatably connected to the bottom surface of the inner cavity of the receiving groove. A retaining spring wire 26231 is fixedly connected to the outer side of the swing plate 26232. The other end of the retaining spring wire 26231 is fixedly connected to the inner wall of the receiving groove. An air intake side groove 26230 is opened on the inner wall of the lifting block 2623 near the auxiliary exhaust pipe 263.

[0051] In this embodiment, hydrogen is discharged by connecting multiple sets of exhaust bends 262 at the upper end of the top plate 261, and then stored in the gas storage ring plate 24. (Refer to...) Figures 15-16As shown, in the normal state, 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 gas inlet side groove 26230 is not connected with the auxiliary exhaust pipe 263; 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 gas 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 continuously pushes upward, a plurality of swing pieces 26232 are swung under the action of the gas, the central flow passage of the lifting block 2623 is reduced, the lifting block 2623 rises, and the gas pressure at this time is greater than the elastic force of the sleeve elastic wire 26221. The sleeve elastic wire 26221 contracts, and at this time, the gas inlet side groove 26230 on the side of the lifting block 2623 enters a certain hydrogen, and simultaneously applies a certain upward pushing force to the lifting block 2623. Subsequently, the gas inlet side groove 26230 is connected with the input end of the auxiliary exhaust pipe 263, so that the hydrogen is output through the auxiliary exhaust pipe 263 and the backflushing guide pipe 265. At this time, the output end of the backflushing guide pipe 265 is just opposite to the position of the sensor 260. In this way, the backflushing effect of high-pressure gas is used to realize self-cleaning of the sensor 260, and the service life of the detection equipment is prolonged.

[0052] Embodiment six

[0053] Referring to the drawings Figures 1-16 On the basis of embodiment five, the application further provides a detection method of the hydrogen concentration detection device, which comprises the following steps:

[0054] Step one, gas introduction: the external hydrogen discharge connection pipe is sealingly connected with the input port of the gas chamber assembly 2, so as to realize the input of hydrogen;

[0055] Step two, gas lifting and preliminary diffusion: the gas lifting assembly starts to work, and the hydrogen is preliminarily introduced into the inside of the gas conveying pipe 21 for diffusion;

[0056] Step three, 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;

[0057] Step four, gas discharge: after the detection is completed, the exhaust mechanism starts to work.

[0058] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the 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 assembly (11), a display and control assembly (12), a display cover assembly (13), and an alarm (14), characterized in that: 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 delivery pipe (21), an inlet pipe (22), a threaded connector (23), and a gas storage ring plate (24). The upper outer surface of the threaded connector (23) is threadedly connected to the bottom end of the housing assembly (11). The lower outer ring surface of the threaded connector (23) is threadedly connected to the upper inner surface of the gas delivery pipe (21). The lower outer surface of the gas delivery pipe (21) is threadedly connected to the upper end of the inlet pipe (22). The lower end of the inlet pipe (22) is connected to an inlet (221). (21) is provided with a gas delivery mechanism, which includes a gas lifting component and a uniform diffusion component. The uniform diffusion component includes a conical cover (25) and an annular cover plate (26). A sensor (260) is embedded in the inner ring surface of the annular cover plate (26). A top plate (261) is fixedly installed at the upper end of the annular cover plate (26). An exhaust mechanism is provided at the upper end of the top plate (261). The exhaust mechanism includes an exhaust bend (262). The output end of the exhaust bend (262) passes through the inner wall of the gas delivery pipe (21) and extends into the interior of the gas storage ring plate (24). The lower end of the gas pipeline (21) is fixedly connected to a concave tube platform (211), which is integrally formed with the gas pipeline (21). The inner side of the concave tube platform (211) is threadedly connected to a sealing base (212). The upper inner wall of the sealing base (212) is uniformly provided with diffusion holes (2120), and the lower center inner wall of the sealing base (212) is provided with a piston hole (21201). The gas lifting assembly includes a piston and a drive component. The piston includes a piston plate (214) and a piston rod (215). The drive component includes a central sleeve (213). The central sleeve (213) is integrally formed from a horizontal plate and a vertical cylinder. The outer surface of the vertical cylinder is fixedly connected to the upper inner wall of the sealing base (212).

2. The hydrogen concentration detection device according to claim 1, characterized in that: The driving component 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 with the outer surface of the driven gear ring (2132) and rotates. The inner surface of the center of the driven gear ring (2132) is fixedly connected to the outer surface of the lower end of the fixed collar (2133). The inner ring surface of the fixed collar (2133) is movably connected to the outer surface of the central sleeve (213). A blade (2134) is fixedly connected to the upper end of the fixed collar (2133).

3. The hydrogen concentration detection device according to claim 2, characterized in that: The outer surface of the piston plate (214) is fitted and snapped into the piston hole (21201). The inner surface of the center of the piston plate (214) is fixedly connected to the lower end of the piston rod (215). A spring (2151) is slidably sleeved on the lower outer surface of the piston rod (215). 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.

4. The hydrogen concentration detection device according to claim 1, characterized in that: The lower end of the conical shroud (25) is fixedly connected to the upper surface of the concave tube platform (211). The conical shroud (25) consists of a lower conical shroud and an upper conical shroud. A flow guide baffle (251) is uniformly installed on the inner surface of the lower conical shroud, and a flow guide baffle (252) is uniformly installed on the inner surface of the upper conical shroud. A uniformly distributed perforated plate (253) is fixedly installed between the upper conical shroud and the lower conical shroud. The central inner surface of the uniformly distributed perforated plate (253) is movably connected to the outer surface of the fixed collar (2133).

5. The hydrogen concentration detection device according to claim 1, characterized in that: The exhaust mechanism also includes an auxiliary exhaust pipe (263), a support ring plate (264), and a backflush 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 to the inner wall of one side of the exhaust bend (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 backflush duct (265). The other end of the backflush duct (265) penetrates the upper inner wall of the annular cover plate (26). A one-way valve is provided on the inner side wall of the backflush duct (265).

6. The hydrogen concentration detection device according to claim 5, characterized in that: The lower end of the exhaust bend (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 bend (262). Two sets of fixing rings (2621) are provided, and a guide post (2622) is fixedly installed between the two sets of fixing rings (2621). A lifting block (2623) is slidably connected to the outer surface of the guide post (2622).

7. A hydrogen concentration detection device according to claim 6, characterized in that: The upper side of the guide post (2622) is slidably fitted with a sleeve spring wire (26221). The upper end of the sleeve spring wire (26221) is fixedly connected to the inner side of a set of fixing rings (2621). The other end of the sleeve spring wire (26221) is fixedly connected to the upper surface of the lifting block (2623). A receiving groove is opened on the inner wall of the center of the lifting block (2623). A swing plate (26232) is rotatably connected to the bottom surface of the inner cavity of the receiving groove. A retaining spring wire (26231) is fixedly connected to the outer side of the swing plate (26232). The other end of the retaining spring wire (26231) is fixedly connected to the inner wall of the receiving groove. An air intake side groove (26230) is opened on the inner wall of the lifting block (2623) near the auxiliary exhaust pipe (263).

8. A detection method for a hydrogen concentration detection device, implemented based on a hydrogen concentration detection device according to any one of claims 1-7, characterized in that: The detection method of this hydrogen concentration detection device includes the following steps: Step 1, Gas Introduction: Seal and connect the external hydrogen emission pipe to the inlet of the gas chamber assembly (2) to realize the input of hydrogen; Step 2, Gas Lifting and Initial Diffusion: The gas lifting assembly starts working, and hydrogen gas initially enters the gas transmission pipe (21) for diffusion; Step 3, Uniform diffusion and detection: The input hydrogen gas is uniformly diffused through the gas lifting component and the uniform diffusion component. The sensor (260) detects the concentration of the hydrogen gas after uniform diffusion 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.

Images