Hydrogen fuel cell hydrogen supply device for communication base station

Abstract

The invention relates to the technical field of hydrogen fuel cells, and discloses a hydrogen fuel cell hydrogen supply device for a communication base station, the hydrogen fuel cell hydrogen supply device comprises a hydrogen storage tank and a pressure reducing valve, the hydrogen storage tank is provided with a hydrogen supply interface, and the hydrogen storage tank is used for supplying hydrogen to a hydrogen fuel cell stack; the pressure reduction unit is used for eliminating gas masses in the hydrogen so as to avoid the cavitation phenomenon; when hydrogen is supplied to the hydrogen fuel cell, hydrogen is discharged from the hydrogen supply interface, sequentially passes through the turbulent flow tube, the vibration tube, the Venturi tube and the filter tube to eliminate air mass in the hydrogen, and then enters the pressure reducing valve to be subjected to pressure reduction, so that hydrogen is supplied to the hydrogen fuel cell stack. Cavitation is inhibited through the synergistic effect of the turbulent flow pipe, the vibration pipe, the venturi pipe and the filter pipe, so that the problems that the cavitation phenomenon is caused by instantaneous great reduction of the hydrogen pressure, the equipment is damaged by the cavitation phenomenon, and the service life of the device is affected are effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydrogen fuel cell, more particularly, it relates to a hydrogen fuel cell hydrogen supply device for communication base station. BACKGROUND

[0002] Communication base station plays a key supporting role for the normal operation of communication network, and stable power supply is extremely important. Traditional mains power supply is difficult to cover remote areas due to geographical factors and natural disasters, and backup power supplies such as lead-acid batteries and lithium batteries also have their own drawbacks. Hydrogen fuel cells have obvious advantages, high energy conversion efficiency and clean and pollution-free, and have begun to be applied to communication base stations. The supporting hydrogen supply device is responsible for the hydrogen-related link to ensure stable operation.

[0003] In the operation process of the hydrogen fuel cell hydrogen supply system, when hydrogen needs to be rapidly transitioned from a high pressure state to a low pressure state, for example, during the hydrogen supply operation from the high-pressure hydrogen storage tank to the hydrogen fuel cell, the hydrogen in the hydrogen storage tank is often at a pressure level as high as 10 MPa or even higher. However, the hydrogen pressure range that the hydrogen fuel cell can maintain for normal operation is only 1-3 MPa.

[0004] Under this condition, if a simple and direct pressure reduction means is used, causing the hydrogen pressure to instantaneously decrease significantly, the hydrogen pressure in the local area is likely to decrease below the saturated vapor pressure, thereby causing cavitation. Specifically, cavitation refers to the generation of gas bubbles in a liquid or gas when the local pressure of the liquid or gas decreases below the saturated vapor pressure of the liquid or gas. These gas bubbles quickly collapse in the high-pressure area, causing impact and vibration, which can damage the equipment and affect the service life of the device. SUMMARY

[0005] The present application provides a hydrogen fuel cell hydrogen supply device for communication base station, which solves the technical problem that in the related art, the instant and significant decrease of hydrogen pressure can cause cavitation, which can damage the equipment and affect the service life of the device.

[0006] The present application provides a hydrogen fuel cell hydrogen supply device for communication base station, which includes a hydrogen storage tank and a pressure reduction valve, the hydrogen storage tank is provided with a hydrogen supply interface, and the hydrogen storage tank is used to supply hydrogen to the hydrogen fuel cell stack; a pressure reduction unit is arranged between the hydrogen supply interface and the pressure reduction valve to eliminate gas clusters in the hydrogen through the pressure reduction unit to avoid the occurrence of cavitation; the pressure reduction unit includes a turbulence pipe, a vibration pipe, a Venturi pipe and a filter pipe. When hydrogen is supplied to the hydrogen fuel cell, the hydrogen is discharged from the hydrogen supply interface and sequentially passes through the turbulence pipe, the vibration pipe, the Venturi pipe and the filter pipe to eliminate gas clusters in the hydrogen, and then enters the pressure reduction valve for pressure reduction to supply hydrogen to the hydrogen fuel cell stack.

[0007] As a further optimization scheme of the present application, the spoiler pipe is provided with a partition plate, and an air inlet pipe is arranged on the partition plate.

[0008] As a further optimization scheme of the present application, a plurality of air holes are further arranged on the air inlet pipe, and the air holes are located inside the spoiler cover.

[0009] As a further optimization scheme of the present application, a first spoiler plate is further arranged in the spoiler pipe, and the first spoiler plate is arranged in a spiral shape.

[0010] As a further optimization scheme of the present application, a plurality of groups of movable racks are symmetrically arranged in the vibration pipe, and a plurality of groups of reeds are arranged on the movable racks, and the reeds on each group of the movable racks are arranged in a staggered manner.

[0011] As a further optimization scheme of the present application, the reed comprises a plurality of recessed portions and a plurality of protruding portions, and the recessed portions and the protruding portions are arranged in a cross shape.

[0012] As a further optimization scheme of the present application, a fixed plate is symmetrically arranged in the vibration pipe, and a rotating shaft is connected to the fixed plate through a bearing, and an impeller and a rotating disc are arranged on the rotating shaft, a connecting shaft is connected to the fixed plate through a bearing, and a swing arm is arranged on the connecting shaft, a fan tooth is arranged on the swing arm, and a rack plate is engaged with the fan tooth, a connecting rod is further arranged on the rack plate, and the connecting rod is fixedly connected with the movable rack.

[0013] As a further optimization scheme of the present application, a swing groove is arranged in the swing arm, and a slide rod is slidably connected in the swing groove, and the slide rod is arranged on the rotating disc.

[0014] As a further optimization scheme of the present application, a first air filter element is arranged in the filter pipe, for filtering the hydrogen after pressure reduction, and a dispersion plate is further arranged in the filter pipe, and a plurality of dispersion holes are arranged in the dispersion plate, and the filtered hydrogen is dispersed through the dispersion holes when the hydrogen passes through the first air filter element.

[0015] As a further optimization scheme of the present application, the pressure reducing valve comprises a valve body, and an air inlet, an air outlet and a valve core are arranged on the valve body, and a flow guide cover is further arranged on the valve body, and a second air filter element is arranged in the flow guide cover.

[0016] The hydrogen is disturbed by the turbulence pipe and the vibration pipe, the air mass phenomenon in the hydrogen is eliminated, the serious cavitation caused by the rapid pressure recovery and the bubble breaking is prevented by the Venturi pipe, and the hydrogen stable flow state is maintained by the filter pipe on the basis of filtering impurities, so that the problem that the hydrogen pressure instantaneous large reduction causes the cavitation phenomenon, the cavitation phenomenon causes the damage to the equipment, and the service life of the device is affected is effectively solved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic diagram of the three-dimensional structure of the present application;

[0018] Figure 2 is a schematic diagram of the three-dimensional structure of the pressure reducing unit of the present application;

[0019] Figure 3 is a schematic diagram of the three-dimensional structure of the pressure reducing unit and the pressure reducing valve of the present application;

[0020] Figure 4 is a schematic diagram of the three-dimensional structure of the turbulence pipe of the present application;

[0021] Figure 5 is a schematic diagram of the three-dimensional structure of the Figure 4 of the present application;

[0022] Figure 6 is a schematic diagram of the three-dimensional structure of the vibration pipe of the present application;

[0023] Figure 7 is a schematic diagram of the three-dimensional structure of the Figure 6 of the present application;

[0024] Figure 8 is a schematic diagram of the three-dimensional structure of the reed of the present application;

[0025] Figure 9 is a schematic diagram of the three-dimensional structure of the driving assembly of the present application;

[0026] Figure 10 is a schematic diagram of the three-dimensional structure of the Venturi pipe of the present application;

[0027] Figure 11 is a schematic diagram of the three-dimensional structure of the filter pipe of the present application.

[0028] In the figure: 100, hydrogen storage tank; 200, hydrogen supply interface; 300, pressure reducing unit; 310, turbulence pipe; 3101, partition; 3102, air inlet pipe; 3103, stop block; 3104, turbulence cover; 3105, air hole; 3106, first turbulence plate; 320, vibration pipe; 3201, movable frame; 3202, reed; 3203, slide rail; 3204, fixed plate; 3205, rotating shaft; 3206, impeller; 3207, rotating disc; 3208, connecting shaft; 3209, swing arm; 3210, fan tooth; 3211, rack plate; 3212, slide rod; 3213, connecting rod; 3214, slide sleeve; 3215, spring; 32021, recess; 32022, protrusion; 330, venturi pipe; 331, converging pipe; 332, throat pipe; 333, diffuser pipe; 334, second turbulence plate; 340, filter pipe; 3401, first air filter element; 3402, dispersion plate; 3403, dispersion hole; 400, pressure reducing valve; 410, valve body; 420, air inlet; 430, air outlet; 440, valve core; 450, flow guide cover; 460, second air filter element; 500, pressure gauge. DETAILED DESCRIPTION

[0029] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that the discussion of these implementations is merely meant to provide a better understanding of the subject matter described herein and can be changed in function and arrangement without departing from the scope of the present disclosure. Various examples can omit, substitute, or add various procedures or components as appropriate. Also, features described with respect to some examples can be combined in other examples.

[0030] According to Figures 1 to 3 As shown in the figure, a hydrogen fuel cell hydrogen supply device for a communication base station includes a hydrogen storage tank 100 and a pressure reducing valve 400. The hydrogen storage tank 100 is provided with a hydrogen supply interface 200, and is used to supply hydrogen to a hydrogen fuel cell stack. The pressure reducing valve 400 is provided with a pressure gauge 500.

[0031] It should be understood that when high-pressure hydrogen gas flows to the low-pressure side through the pressure reducing valve 400, the pressure will decrease significantly in a short time. According to the principle of cavitation, when the pressure decreases to a certain extent, the gas or liquid originally dissolved in the hydrogen gas will escape in the form of small bubbles, which constitutes the initial condition for cavitation.

[0032] Specifically, the internal structure of the pressure reducing valve 400 changes the flow rate distribution of the hydrogen, and the flow rate increases rapidly in some local areas. According to Bernoulli's principle, when the flow rate increases, the pressure at the corresponding position decreases, and when the local pressure decreases to below the saturated vapor pressure of the hydrogen, the hydrogen vaporizes to generate bubbles, thereby causing cavitation. For example, at the narrow flow passage between the valve core 440 and the valve seat of the pressure reducing valve 400, the flow rate of the hydrogen increases rapidly, and the pressure decreases rapidly, which is likely to form a local low-pressure area, thereby causing cavitation.

[0033] Here, it needs to be explained in detail that the pressure reducing valve 400 includes a valve body 410, and the valve body 410 is provided with an air inlet 420, an air outlet 430, and a valve core 440. Among them, the hydrogen supply interface 200 and the pressure reducing valve 400, especially the position of the air inlet 420 of the pressure reducing valve 400, are prone to cavitation.

[0034] In addition, when the hydrogen is about to enter the pressure reducing valve 400 to start decompression near the air inlet 420 of the pressure reducing valve 400, this position is a transition area where the pressure rapidly changes from the high pressure in the hydrogen tank to the lower set pressure in the pressure reducing valve 400, and the pressure change rate is very fast.

[0035] That is, at the special structural position of the air inlet 420 of the pressure reducing valve 400, the flow rate distribution of the hydrogen is not uniform due to the sudden narrowing of the flow passage and some internal structural features, such as the shape design of the chamfer at the inlet, the transition fillet, etc. In some local areas, the flow rate is higher. According to Bernoulli's principle, in the steady flow of ideal fluid, the sum of the dynamic pressure and the static pressure of the fluid in the same flow pipe remains unchanged, that is, when the flow rate increases, the static pressure decreases. The pressure in these local areas with higher flow rate decreases rapidly, and when it decreases to below the saturated vapor pressure of the hydrogen under the current working condition, the hydrogen vaporizes to generate a large number of tiny bubbles, thereby causing cavitation. Moreover, these bubbles will flow into the pressure reducing valve 400 along with the hydrogen, further affecting the normal work of the pressure reducing valve 400.

[0036] Further, according to Figure 2 and Figure 3 , a pressure reducing unit 300 is arranged between the hydrogen supply interface 200 and the pressure reducing valve 400 to eliminate the gas clusters in the hydrogen through the pressure reducing unit 300 to avoid the occurrence of cavitation.

[0037] The decompression unit 300 comprises a turbulence tube 310, a vibration tube 320, a Venturi tube 330 and a filter tube 340, which are detachably connected. When hydrogen is supplied to the hydrogen fuel cell, the hydrogen gas discharged from the hydrogen supply interface 200 passes through the turbulence tube 310, the vibration tube 320, the Venturi tube 330 and the filter tube 340 in sequence to eliminate the gas clusters in the hydrogen gas, and then enters the decompression valve 400 for decompression to supply the hydrogen fuel cell stack with hydrogen gas.

[0038] It should be noted that, in the present embodiment, the energy in the hydrogen flow is dispersed and consumed by the provision of the turbulence tube 310. When the hydrogen gas flows from the high-pressure side into the turbulence tube 310, the high-pressure energy and kinetic energy originally carried by the hydrogen gas are partially dissipated in the form of heat or converted into energy forms that cause the hydrogen gas to have more complex flow patterns after the complex turbulence process. Thus, when the hydrogen gas flows out of the turbulence tube 310 into the decompression valve 400, the variation gradient of the pressure and flow rate will be relatively gentle, thereby reducing the possibility of cavitation caused by a sharp change in pressure.

[0039] Secondly, the complex flow pattern formed in the turbulence tube 310 helps the already generated cavitation bubbles to be quickly discharged out of the tube, although it causes local pressure fluctuations. Since the hydrogen gas is in a flow state of constant tumbling, rotation and vortex generation in the turbulence tube 310, the bubbles are more likely to be carried out of the tube along with these complex flows rather than gathering near the tube wall to continuously damage the tube wall.

[0040] Meanwhile, the vibration tube 320 can break and disperse the cavitation bubbles generated in the tube by virtue of its own vibration characteristics. When cavitation bubbles exist in the tube, the vibration is transmitted to the hydrogen gas and the bubbles themselves, causing the bubbles to be shattered into smaller micro-bubbles under the action of vibration. The impact and destructive power generated when these micro-bubbles break is much smaller than that of a single large bubble, thereby reducing the erosion of the tube wall and the internal structure of the pipe.

[0041] Moreover, the vibration of the vibration tube 320 can also promote the mixing of the cavitation bubbles and the hydrogen gas, change the distribution state of the bubbles in the tube and make them more uniformly dispersed in the hydrogen flow. In this way, the local pressure impact generated by the breaking of the bubbles can also be uniformly distributed in the entire tube, avoiding the serious cavitation damage of local areas caused by the concentrated breaking of a large number of bubbles, which helps to protect the integrity of the pipe and prolong its service life.

[0042] In addition, the provision of the Venturi tube 330 makes the speed and gradient of the pressure recovery more appropriate when the hydrogen gas transitions from the high-speed low-pressure state at the throat to the normal pressure state downstream, thereby avoiding the serious cavitation damage caused by the rapid recovery of pressure and the sharp breaking of bubbles

[0043] Finally, through the arrangement of the filter pipe 340, the filter pipe 340 can minimize the interference with the hydrogen flow state while maintaining good filtering effect, avoiding the situation that the uneven flow rate and excessive turbulence caused by its own structure easily cause cavitation. So that the hydrogen can still enter the pressure reducing valve 400 in a relatively stable flow state after passing through the filter pipe 340, maintaining the stability of the pressure and flow rate of the entire hydrogen supply system, and further inhibiting the generation of cavitation phenomenon.

[0044] According to Figure 4 and Figure 5 , a baffle 3101 is installed in the turbulence pipe 310, and an air inlet pipe 3102 is installed on the baffle 3101. The baffle 3101 is provided with a through hole matched with the air inlet pipe 3102, and a block 3103 is installed on the air inlet pipe 3102. A turbulence cover 3104 is installed on the block 3103, and the turbulence cover 3104 is located outside the air inlet pipe 3102.

[0045] The hydrogen enters the turbulence pipe 310 through the air inlet pipe 3102. The through hole on the baffle 3101 and the air inlet pipe 3102 are equivalent to dividing and guiding the hydrogen inlet process. Compared with the hydrogen directly flowing into the turbulence pipe 310 in large quantities, this structure can buffer the pressure when the hydrogen enters. The air inlet pipe 3102 plays a role of flow limiting, limiting the flow and speed of hydrogen entering the turbulence pipe 310 per unit time, avoiding the risk of cavitation caused by sudden change of local pressure due to too large instantaneous inlet amount.

[0046] The existence of the block 3103 and the turbulence cover 3104 further affects the flow state of the hydrogen. The block 3103 will make the hydrogen collide with it before entering the main body of the turbulence pipe 310, changing the original flow direction and speed of the hydrogen, and playing a preliminary turbulence role. The turbulence cover 3104 makes the hydrogen diffuse and redistribute in its internal area, so that the hydrogen enters the internal space of the turbulence pipe 310 in a more dispersed and uniform flow state.

[0047] Specifically, a plurality of air holes 3105 are provided on the air inlet pipe 3102, and the positions of the plurality of air holes 3105 are located in the interior of the turbulence cover 3104.

[0048] When the hydrogen is discharged from the air holes 3105, due to the existence of the turbulence cover 3104, the hydrogen enters the turbulence pipe 310 in the form of many dispersed small gas streams. This dispersed inlet mode makes it difficult for the hydrogen to form concentrated and large-volume cavitation bubbles in the turbulence pipe 310.

[0049] Further, the first spoiler plate 3106 is installed in the turbulence tube 310 and is arranged in a spiral shape. The spiral-shaped first spoiler plate 3106 changes the flow path of the hydrogen in the turbulence tube 310, so that the hydrogen no longer flows in a straight line, but flows along a spiral trajectory. In this process, the kinetic energy and pressure energy of the hydrogen are continuously disturbed and consumed by the spoiler plate, and part of the energy is dissipated in the form of heat or is converted into a more complex energy form that causes the hydrogen to generate a more complex flow state, avoiding the hydrogen directly impacting the pressure reducing valve 400 with excessive energy, so that the pressure and flow rate of the hydrogen flowing out of the turbulence tube 310 change relatively gently, reducing the possibility of cavitation caused by sudden changes in pressure and flow rate.

[0050] The complex flow state formed by the spiral spoiler plate continuously disrupts the tendency of the cavitation bubbles generated in the hydrogen to gather. The bubbles are difficult to stably gather together to form large air masses in this spiral flow environment, but are dispersed in different flow areas and move with the flow of hydrogen.

[0051] According to Figure 6 , Figure 7 and Figure 8 , a plurality of movable racks 3201 are symmetrically arranged in the vibration tube 320, and a plurality of reeds 3202 are installed on the movable racks 3201, and the reeds 3202 on each movable rack 3201 are arranged in a staggered manner. Among them, the reed 3202 includes a plurality of recessed portions 32021 and a plurality of protruding portions 32022, and the recessed portions 32021 and the protruding portions 32022 are arranged in a cross shape.

[0052] When the hydrogen passes through the vibration tube 320, the reeds 3202 are driven by the airflow to shake, thereby dispersing the air masses in the hydrogen and vibrating and dissipating the air masses contained in the hydrogen through the shaking action of the reeds 3202. Moreover, through the arrangement of the recessed portions 32021 and the protruding portions 32022, when the hydrogen passes through, the hydrogen drives the protruding portions 32022 to shake, and the protruding portions 32022 shake through the weak parts of the recessed portions 32021, thereby improving the turbulence effect on the hydrogen and eliminating cavitation.

[0053] In addition, through the shaking action of the reeds 3202, the air masses in the hydrogen can be more uniformly distributed in the tube. If the air masses are not uniformly distributed, the air masses are too dense in some local areas, which can cause the cavitation phenomenon in these areas to worsen and the local pipe wall to be rapidly damaged. The staggered arrangement of the reeds 3202 on the movable racks 3201 enables the air masses to be repeatedly stirred and dispersed in all directions as the hydrogen flows through the entire vibration tube 320, ultimately achieving a relatively uniform distribution state, avoiding the local cavitation from worsening, ensuring the relative balance of the cavitation in the entire vibration tube 320, and reducing the damage to the pipeline caused by cavitation as a whole.

[0054] It needs to be understood that, since the reed 3202 is constantly shaken by the gas flow and continuously exerts vibration dissipation on the gas cluster as long as the gas cluster exists during the continuous flow of hydrogen, this way can dynamically process the continuously generated gas cluster, keep the gas cluster content of hydrogen in the vibration tube 320 at a relatively low level, and long-term inhibit the occurrence and development of cavitation.

[0055] According to Figure 7 and Figure 9 It is shown that the sliding groove is provided in the movable frame 3201, and a plurality of sliding rails 3203 are symmetrically installed in the vibration tube 320, and the sliding rails 3203 are in sliding connection with the sliding groove. Through the sliding connection of the sliding groove and the sliding rails 3203, the movable frame 3201 can move in the vibration tube 320.

[0056] Specifically, the fixed plate 3204 is symmetrically installed in the vibration tube 320, and the rotating shaft 3205 is connected to the fixed plate 3204 through bearings, and the impeller 3206 and the rotating disc 3207 are installed on the rotating shaft 3205. When the hydrogen gas passes through the vibration tube 320, the hydrogen gas drives the impeller 3206 to rotate, thereby driving the rotating shaft 3205 to rotate and providing the rotating disc 3207 with rotating power.

[0057] Further, the connecting shaft 3208 is connected to the fixed plate 3204 through bearings, and the swing arm 3209 is installed on the connecting shaft 3208. The fan teeth 3210 are installed on the swing arm 3209, and the rack plate 3211 is connected to the fan teeth 3210 in meshing. The swing groove is provided in the swing arm 3209, and the sliding rod 3212 is in sliding connection with the swing groove. The sliding rod 3212 is installed on the rotating disc 3207.

[0058] When the rotating disc 3207 rotates, the rotating disc 3207 drives the sliding rod 3212 to rotate synchronously, so that the sliding rod 3212 moves in the swing groove, and drives the swing arm 3209 to reciprocating swing around the connecting shaft 3208. Moreover, through the reciprocating swing of the swing arm 3209, the fan teeth 3210 are driven to swing back and forth, so that the fan teeth 3210 and the rack plate 3211 are connected in meshing, thereby driving the rack plate 3211 to reciprocate.

[0059] The rack plate 3211 is further provided with a connecting rod 3213, and the connecting rod 3213 is fixedly connected with the movable frame 3201, and the movable frame 3201 is driven to reciprocate by the rack plate 3211, so that the movable frame 3201 reciprocates, and the reed 3202 is continuously assisted to swing in the vibration tube 320. The connecting rod 3213 is slidably connected with a sliding sleeve 3214, and the sliding sleeve 3214 is fixedly connected with the inner wall of the vibration tube 320. The sliding sleeve 3214 is arranged to limit the sliding of the connecting rod 3213, thereby improving the stability of the reciprocating movement of the connecting rod 3213. The connecting rod 3213 is provided with a spring 3215, and the two ends of the spring 3215 are fixedly connected with the movable frame 3201 and the sliding sleeve 3214 respectively. The spring 3215 is arranged to pull the connecting rod 3213 and assist the connecting rod 3213 to rotate and reset.

[0060] According to Figure 10 As shown in FIG. 13, the Venturi tube 330 includes a converging pipe 331, a throat pipe 332 and a diffuser pipe 333. The throat pipe 332 is installed between the converging pipe 331 and the diffuser pipe 333. A plurality of second turbulence plates 334 are installed on the inner wall of the diffuser pipe 333, and the second turbulence plates 334 are arranged obliquely. When the hydrogen starts to recover pressure from the throat pipe 332 into the diffuser pipe 333, the plurality of obliquely arranged second turbulence plates 334 can make this process more gentle and uniform. Through the arrangement of the second turbulence plates 334, the flow state of the hydrogen is not simply a smooth flow along the axis of the diffuser pipe 333, but a complex turbulent flow, vortex and the like. Through the change of flow state, the pressure recovery of the hydrogen in the diffuser pipe 333 is not sharp and sudden, but has a buffering process, which avoids the situation that the cavitation bubbles generated at the throat pipe 332 suddenly break in large quantities due to the rapid pressure recovery, resulting in high-temperature and high-pressure micro-jet and strong impact force to cause serious erosion to the inner wall of the diffuser pipe 333.

[0061] According to Figure 11 As shown in FIG. 13, the Venturi tube 330 includes a converging pipe 331, a throat pipe 332 and a diffuser pipe 333. The throat pipe 332 is installed between the converging pipe 331 and the diffuser pipe 333. A plurality of second turbulence plates 334 are installed on the inner wall of the diffuser pipe 333, and the second turbulence plates 334 are arranged obliquely. When the hydrogen starts to recover pressure from the throat pipe 332 into the diffuser pipe 333, the plurality of obliquely arranged second turbulence plates 334 can make this process more gentle and uniform. Through the arrangement of the second turbulence plates 334, the flow state of the hydrogen is not simply a smooth flow along the axis of the diffuser pipe 333, but a complex turbulent flow, vortex and the like. Through the change of flow state, the pressure recovery of the hydrogen in the diffuser pipe 333 is not sharp and sudden, but has a buffering process, which avoids the situation that the cavitation bubbles generated at the throat pipe 332 suddenly break in large quantities due to the rapid pressure recovery, resulting in high-temperature and high-pressure micro-jet and strong impact force to cause serious erosion to the inner wall of the diffuser pipe 333.

[0062] When the hydrogen is filtered by the first air filter element 3401, the flow state of the hydrogen may be affected by the structure of the filter element and become uneven. For example, the resistance of the hydrogen passing through different positions of the first air filter element 3401 may be slightly different, resulting in that the flow rate of the hydrogen out of the first air filter element 3401 is fast in some areas and slow in some areas, forming a local flow rate uneven phenomenon.

[0063] The dispersion holes 3403 in the dispersion plate 3402 can make the hydrogen gas uniformly distributed again, so that the hydrogen gas passes through the dispersion holes 3403 at a relatively consistent flow rate and flow state, avoiding problems such as local pressure fluctuation and turbulence in subsequent pipelines or components due to uneven flow rate, and helping to maintain the stability of the system pressure and reduce the risk of adverse phenomena such as cavitation.

[0064] In addition, according to Figure 3 As shown, the valve body 410 is also provided with a flow guide cover 450, and the second air filter element 460 is installed in the flow guide cover 450. The shape and structure of the flow guide cover 450 itself can guide the flow of hydrogen gas, so that the hydrogen gas can smoothly enter the valve body 410 according to the designed direction and angle. Through cooperation with the second air filter element 460, on the one hand, impurities are filtered through the filter element, and on the other hand, with the flow guiding effect of the flow guide cover 450, the hydrogen gas enters the valve body 410 in a relatively stable and orderly flow state, avoiding the situation that the hydrogen gas directly impacts the internal structure of the valve body 410 to cause flow state disorder and local pressure anomaly, etc., ensuring that the valve body 410 works normally in a stable flow state and pressure environment, improving the reliability and accuracy of the valve work, and also helping to prolong the service life of the valve body 410.

[0065] The above describes the embodiments of the present embodiment, but the present embodiment is not limited to the above-mentioned specific embodiment, and the above-mentioned specific embodiment is only illustrative but not restrictive. Those skilled in the art can make many forms under the inspiration of the present embodiment, which all belong to the protection of the present embodiment.

Claims

1. A hydrogen supply device for a communication base station using a hydrogen fuel cell, characterized by comprising: a hydrogen storage container; a hydrogen supply unit; a hydrogen supply unit controller; and a hydrogen supply unit pressure sensor. The application relates to a hydrogen storage tank (100) and a pressure reducing valve (400), wherein a hydrogen supply interface (200) is arranged on the hydrogen storage tank (100) and used for supplying hydrogen to a hydrogen fuel cell stack; a pressure reducing unit (300) is arranged between the hydrogen supply interface (200) and the pressure reducing valve (400) and used for eliminating gas clusters in hydrogen to avoid cavitation; the pressure reducing unit (300) comprises a spoiler pipe (310), a vibration pipe (320), a Venturi pipe (330) and a filter pipe (340), when hydrogen is supplied to the hydrogen fuel cell, the hydrogen is discharged from the hydrogen supply interface (200) and sequentially passes through the spoiler pipe (310), the vibration pipe (320), the Venturi pipe (330) and the filter pipe (340) to eliminate the gas clusters in the hydrogen, and then enters the pressure reducing valve (400) to be reduced in pressure and supply the hydrogen to the hydrogen fuel cell stack. A partition plate (3101) is arranged in the spoiler pipe (310), an air inlet pipe (3102) is arranged on the partition plate (3101), a through hole is formed in the partition plate (3101) and matched with the air inlet pipe (3102), a stop block (3103) is arranged on the air inlet pipe (3102), a spoiler cover (3104) is arranged on the stop block (3103), and the spoiler cover (3104) is located outside the air inlet pipe (3102). A plurality of air holes (3105) are formed in the air inlet pipe (3102) and located inside the spoiler cover (3104). A first spoiler plate (3106) is arranged in the spoiler pipe (310) and arranged in a spiral shape.

2. The hydrogen supply apparatus for a hydrogen fuel cell of a communication base station according to claim 1, wherein A plurality of movable frames (3201) are symmetrically arranged in the vibration pipe (320), a plurality of spring pieces (3202) are arranged on the movable frames (3201), and the spring pieces (3202) on each movable frame (3201) are arranged in an interlaced mode.

3. The hydrogen supply apparatus for a hydrogen fuel cell of a communication base station according to claim 2, wherein The spring piece (3202) comprises a plurality of recessed portions (32021) and a plurality of convex portions (32022), and the recessed portions (32021) and the convex portions (32022) are arranged in an interlaced mode.

4. The hydrogen supply apparatus for a hydrogen fuel cell of a communication base station according to claim 2, wherein A fixed plate (3204) is symmetrically arranged in the vibration pipe (320), a rotating shaft (3205) is connected to the fixed plate (3204) through a bearing, a vane wheel (3206) and a rotating disc (3207) are arranged on the rotating shaft (3205), a connecting shaft (3208) is connected to the fixed plate (3204) through a bearing, a swing arm (3209) is arranged on the connecting shaft (3208), a fan tooth (3210) is arranged on the swing arm (3209), a rack plate (3211) is engaged with the fan tooth (3210), a connecting rod (3213) is arranged on the rack plate (3211), and the connecting rod (3213) is fixedly connected with the movable frame (3201).

5. The hydrogen supply apparatus for a hydrogen fuel cell base station according to claim 1, wherein A swing groove is formed in the swing arm (3209), and a sliding rod (3212) is slidably connected in the swing groove, and the sliding rod (3212) is arranged on the rotating disc (3207).

6. The hydrogen supply apparatus for a hydrogen fuel cell base station according to claim 5, wherein ​ 7. The hydrogen supply apparatus for a hydrogen fuel cell base station according to claim 5, wherein ​ 8. The hydrogen supply apparatus for a hydrogen fuel cell base station according to claim 7, wherein ​ 9. The hydrogen supply apparatus for a hydrogen fuel cell base station according to claim 1, wherein A first air filter element (3401) is arranged in the filter pipe (340) to filter the hydrogen after pressure reduction, and a dispersion plate (3402) is also arranged in the filter pipe (340), and a plurality of dispersion holes (3403) are formed in the dispersion plate (3402), so that the filtered hydrogen is dispersed through the dispersion holes (3403) when the hydrogen passes through the first air filter element (3401).

10. The hydrogen supply apparatus for a hydrogen fuel cell base station according to claim 1, wherein The pressure reduction valve (400) comprises a valve body (410), and the valve body (410) is provided with an air inlet (420), an air outlet (430) and a valve core (440), and the valve body (410) is also provided with a flow guide cover (450), and the flow guide cover (450) is arranged with a second air filter element (460).

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