High-pressure hydrogen pressure reducing valve and using method thereof

Abstract

The invention relates to the technical field of pressure reducing valves, and discloses a high-pressure hydrogen pressure reducing valve and a using method thereof.The high-pressure hydrogen pressure reducing valve comprises a valve pipe assembly, the valve pipe assembly comprises a hydrogen filtering assembly, the two ends of the hydrogen filtering assembly fixedly communicate with valve shells, and the top of the hydrogen filtering assembly fixedly communicates with a gas valve assembly; one end of the hydrogen filtering assembly is fixedly sleeved with an electric heating ring sleeve, the other end of the hydrogen filtering assembly is rotationally connected with a fan wheel, the side face of the fan wheel is rotationally sleeved with a magnetic cutting element, the bottom of the fan wheel is fixedly connected with a rotating wheel, and one end of the inner side of the bottom of the valve shell fixedly communicates with a magnetic cylinder. The problem that groove-shaped erosion marks appear on the sealing face of the valve seat due to the fact that metal impurity particles in a pipeline of the pressure reducing valve impact the valve element and the valve seat along with high-speed hydrogen flow is solved, the metal impurity particles attached to the magnetic cylinder can be recycled, and the problems that resources are wasted and the surface of an outlet of a valve body is frosted when high-pressure hydrogen expands through throttling are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure reducing valves, and more specifically to a high-pressure hydrogen pressure reducing valve and its usage method. Background Art

[0002] A high-pressure hydrogen pressure reducing valve is a key device for reducing high-pressure hydrogen to a stable and safe low pressure. It is widely used in hydrogen fuel cell vehicles. The pressure of high-pressure hydrogen is usually 10 MPa to 70 MPa. The pressure reducing valve reduces the hydrogen in the pressure storage hydrogen tank to the pressure suitable for the fuel cell stack (such as 0.5 - 3 MPa) to ensure reaction efficiency and safety. In the application of hydrogen filling stations, the hydrogen in the high-pressure hydrogen storage bottle group is reduced to the pressure required by the filling gun to safely fill hydrogen into hydrogen energy vehicles; In the actual use of high-pressure hydrogen pressure reducing valves, when high-pressure hydrogen undergoes throttling expansion, the Joule-Thomson effect will occur, the temperature will drop sharply, the flow rate at the valve outlet will drop suddenly or be completely blocked, resulting in frosting on the surface of the valve body outlet. In addition, metal impurity particles (welding oxide scales, iron particles) in the pressure reducing valve pipeline impact the valve core and valve seat along with the high-speed hydrogen flow (>20 m / s), resulting in grooved erosion marks on the sealing surface of the valve seat, and further reducing the flow control accuracy. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a high-pressure hydrogen pressure reducing valve and its usage method to solve the problems existing in the above background art.

[0004] To achieve the above object, the present invention provides the following technical solution: A high-pressure hydrogen pressure reducing valve and its usage method, including a valve pipe assembly. The valve pipe assembly includes a hydrogen filtering assembly. Both ends of the hydrogen filtering assembly are fixedly communicated with a valve housing. The top of the hydrogen filtering assembly is fixedly communicated with a gas valve assembly. One end of the hydrogen filtering assembly is fixedly sleeved with an electric heating ring sleeve. The other end of the hydrogen filtering assembly is rotatably connected with a fan wheel; A magnetic cutting element is rotatably sleeved on the side of the fan wheel. A runner is fixedly connected to the bottom of the fan wheel. One end of the inner side of the bottom of the valve housing is fixedly communicated with a magnetic cylinder; The hydrogen filtering assembly and the runner cooperate to remove metal impurity particles in hydrogen. Under the combined action of the hydrogen filtering assembly and the magnetic cylinder, metal impurity particles are removed. Under the combination of the fan wheel, the magnetic cutting element, and the magnetic cylinder, the electric heating ring sleeve inhibits frosting on the surface of the valve body outlet.

[0005] Further, a valve pipe assembly is fixedly communicated inside the valve assembly. A heating assembly is installed at the bottom of the valve pipe assembly. The heating assembly is fixedly communicated with the inner side of the bottom of the valve assembly.

[0006] Further, the valve assembly includes a valve housing. One side of the valve housing is fixedly communicated with an intake pipe, and the other side of the valve housing is fixedly communicated with an outlet pipe. A pressure regulating assembly is fixedly connected to the top of the valve housing. Pressure gauges are fixedly connected to the back surfaces of the intake pipe and the outlet pipe.

[0007] Further, the pressure regulating assembly includes a sealing cover. A regulating rotating shaft is threadedly connected to the top inside the sealing cover. One end of the regulating rotating shaft is fixedly connected to a grip. A toothed ring is fixedly connected to the surface of the middle part of the regulating rotating shaft. A turntable is installed at the bottom of the toothed ring. The turntable meshes with the toothed ring. A rotating rod is rotatably connected to the back surface of the turntable. The rotating rod is fixedly connected to the inner wall of the sealing cover; A transmission member is rotatably connected to the edge position of the front surface of the turntable. One end of the transmission member is rotatably sleeved with a moving rod. One end of the transmission member is rotatably connected to the front surface of the turntable and the other end is rotatably sleeved at the top end of the moving rod. The bottom end of the moving rod is fixedly connected to a valve core. The side surface of the moving rod is movably sleeved with a sleeve. Both sides of the sleeve are fixedly connected with connecting plates. One ends of the two connecting plates are fixedly connected to the inner wall of the sealing cover.

[0008] Further, the fan wheel is composed of an impeller and a rotating roller. The bottom of the impeller is fixedly connected to the rotating roller. The impeller is located inside the hydrogen filtering assembly. The rotating roller passes through the inner wall of the hydrogen filtering assembly and is rotatably connected to the inner wall. A semi-circular block is fixedly connected to the connection part between the hydrogen filtering assembly and the inner wall of the valve housing.

[0009] Further, the hydrogen filtering assembly includes an air flow pipe. A round opening is provided at the top of the air flow pipe, and a square opening is provided at the bottom of the air flow pipe. An arc-shaped groove is provided on one side of the square opening. A sealing arc plate is movably sleeved at one end of the arc-shaped groove. A fixing block is fixedly connected to the top of one end of the sealing arc plate. A filter screen is fixedly connected to the top of the fixing block. The filter screen is movably sleeved inside the air flow pipe and the diameter of the filter screen is the same as the inner diameter of the air flow pipe.

[0010] Further, circular grooves are provided at both ends of the other side of the square opening. Springs are fixedly connected to the inner sides of the two circular grooves. One ends of the two springs are fixedly connected to one side of the sealing arc plate.

[0011] Further, the air valve assembly includes a valve seat. A valve core is movably sleeved on the top of the valve seat. The valve core is composed of an upper cylindrical block and a lower cylindrical block. The bottom of the upper cylindrical block is fixedly connected to the lower cylindrical block. The diameter of the lower cylindrical block is the same as the diameter of the round opening at the top of the air flow pipe. The diameter of the upper cylindrical block is 3 - 5 mm larger than the diameter of the lower cylindrical block. The length of the lower cylindrical block is the same as the inner diameter of the air flow pipe.

[0012] Further, the heating component includes a magnetic cutting element. Both the magnetic cutting element and the runner are inside the magnetic cylinder. The magnetic cutting element is composed of two conductor rings and two conductor frames. The two conductor rings are rotatably sleeved on the roller. Conductor frames are electrically connected to both sides of the two conductor rings. A brush is installed at the top of one side of the conductor ring. The brush is fixedly connected to the bottom of the air flow tube. The brush is movably and electrically connected to the conductor ring located at the top of the magnetic cutting element. A wire is electrically connected to one side of the brush. One end of the wire is electrically connected to an electric heating ring sleeve.

[0013] A method for using a high-pressure hydrogen pressure reducing valve. Using the above-mentioned high-pressure hydrogen pressure reducing valve, it includes the following steps: S1. Rotate the grip to drive the adjustment rotating shaft to rotate. The adjustment rotating shaft fixes its state after rotation through threads. When the adjustment rotating shaft rotates, the turntable also rotates under the meshing relationship. The rotation of the turntable causes one end of the transmission member to move in an arc, moving the other end of the transmission member downward, and then causing the moving rod to move downward. The sleeve movably sleeved on the side of the moving rod acts as a guide rail to ensure that the moving rod moves up and down under the force of the transmission member without deviation. When the grip rotates in the reverse direction, one end of the transmission member moves in a reverse arc, and the other end of the transmission member moves upward, and then the moving rod moves upward. S2. When rotating the grip to make the moving rod move downward, and then making the valve core move downward, the lower cylindrical block gradually falls into the air flow tube, so that the nozzle area of the air flow tube gradually becomes smaller. When hydrogen passes through, due to the sudden reduction of the flow cross-sectional area, the flow rate increases and the pressure decreases (Bernoulli's principle). The nozzle area of the air flow tube gradually becomes smaller and the pressure gradually decreases, so as to achieve the effect of adjusting and reducing the pressure. S3. In the original state, under the action of the spring tension, the sealing arc plate seals the square opening. When high-pressure hydrogen flows through the air flow tube, the filter screen filters the metal impurity particles in the high-pressure hydrogen on one side of the filter screen and adheres to one side of the filter screen. After hydrogen has flowed through the air flow tube for a long time, the metal impurity particles begin to accumulate. When the metal impurity particles block the filter holes of the filter screen, hydrogen cannot pass through the filter screen. Under the push of the high-pressure hydrogen, the filter screen begins to move, causing the sealing arc plate to move into the arc-shaped groove. A gap is formed between the sealing arc plate and the square opening, and the high-pressure hydrogen gushes out from the gap, making the propagation path of the high-pressure hydrogen perpendicular downward. The deflected high-pressure hydrogen blows away the metal impurity particles attached to the filter screen and is discharged from the square opening of the air flow tube together. S4. When high-pressure hydrogen flows through the air flow tube, the high-pressure hydrogen drives the fan wheel to rotate, and then drives the runner to rotate to form wind power. The wind power adsorbs the metal impurity particles discharged from the air flow tube into the magnetic cylinder and is adsorbed on the inner wall by the magnetic force of the magnetic cylinder. The metal impurity particles adhere to the inner wall of the magnetic cylinder. S5. The fan wheel rotates, driving the magnetic cutting element to rotate, so that the magnetic cutting element cuts the magnetic induction lines of the magnetic field formed by the magnetic cylinder, thereby generating an electric current. The electric current is transmitted to the electric heating ring sleeve through the wire and the carbon brush, heating the outlet of the air flow pipe by the electric heating ring sleeve.

[0014] The technical effects and advantages of the present invention: 1. The filter screen is used to intercept metal impurity particles in hydrogen. When the metal impurity particles accumulate and form a blockage in the filter screen, hydrogen cannot pass through the mesh holes of the filter screen. Then, the filter screen is pushed to move, so that the sealing arc plate and the air flow pipe form an opening, allowing hydrogen to flow out from the opening, and blowing away the metal impurity particles attached to the filter screen from the exhaust air flow pipe. The fan wheel rotates at high speed under the blowing of high-pressure hydrogen, driving the runner to rotate to form wind power. The wind power adsorbs the metal impurity particles in the exhaust air flow pipe into the magnetic cylinder and is adsorbed on the inner wall by the magnetic force of the magnetic cylinder. The metal impurity particles adhere to the inner wall of the magnetic cylinder, solving the problem that the metal impurity particles in the pressure reducing valve pipeline impact the valve core and the valve seat along with the high-speed hydrogen flow, resulting in grooved erosion marks on the sealing surface of the valve seat. The metal impurity particles attached to the magnetic cylinder can be recycled, avoiding waste of resources.

[0015] 2. The fan wheel rotates at high speed under the blowing of high-pressure hydrogen, driving the magnetic cutting assembly to rotate, so that the magnetic cutting assembly cuts the magnetic induction lines of the magnetic field formed by the magnetic cylinder, thereby generating an electric current. The electric current is transmitted to the electric heating ring sleeve through the wire and the carbon brush, heating the outlet of the air flow pipe by the electric heating ring sleeve, avoiding the problem of frosting on the surface of the valve body outlet due to the Joule-Thomson effect when high-pressure hydrogen undergoes throttling expansion. Description of the Drawings

[0016] Figure 1 is a schematic diagram of the overall external structure of the present invention; Figure 2 is a schematic diagram of the overall sectional structure of the present invention; Figure 3 is a schematic diagram of the valve assembly structure of the present invention; Figure 4 is a schematic diagram of the pressure regulating assembly structure of the present invention; Figure 5 is a schematic diagram of the valve pipe assembly structure of the present invention; Figure 6 is a schematic diagram of the side structure of the valve pipe assembly of the present invention; Figure 7 is a schematic diagram of the hydrogen filtering assembly structure of the present invention; Figure 8 is a schematic diagram of the left part side sectional view structure of the hydrogen filtering assembly of the present invention; Figure 9 is a schematic diagram of the right part side sectional view structure of the hydrogen filtering assembly of the present invention; Figure 10 is a schematic diagram of the air valve assembly structure of the present invention; Figure 11 This is a schematic structural diagram of the heating component of the present invention.

[0017] The reference numerals are: 1, valve assembly; 101, valve housing; 102, intake pipe; 103, outlet pipe; 104, pressure regulating assembly; 1041, sealing cover; 1042, adjusting rotating shaft; 1043, turntable; 1044, transmission member; 1045, moving rod; 2, valve pipe assembly; 201, hydrogen filtering assembly; 2011, air flow pipe; 2012, filter screen; 2013, fixing block; 2014, sealing arc plate; 202, air valve assembly; 2021, valve seat; 2022, valve core; 203, electric heating ring sleeve; 204, fan wheel; 3, heating component; 301, magnetic cutting element; 302, runner; 303, magnetic cylinder; 304, carbon brush. Specific embodiments

[0018] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples. A high-pressure hydrogen pressure reducing valve and its usage method involved in the present invention are not limited to the various structures described in the following embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0019] Referring to Figure 1 and Figure 2 , the present invention provides a high-pressure hydrogen pressure reducing valve and its usage method, including a valve assembly 1. The inner side of the valve assembly 1 is fixedly communicated with a valve pipe assembly 2. The bottom of the valve pipe assembly 2 is provided with a heating component 3, and the heating component 3 is fixedly communicated with the inner side of the bottom of the valve assembly 1.

[0020] In this embodiment, it should be specifically supplemented that the valve pipe assembly 2 solves the problem that metal impurity particles in the pressure reducing valve pipeline impact the valve core and valve seat with the high-speed hydrogen flow, resulting in grooved erosion marks on the sealing surface of the valve seat. The heating component 3 avoids the problem of frosting on the surface of the valve body outlet due to the Joule-Thomson effect when high-pressure hydrogen undergoes throttling expansion. The specific structures and working principles of the above components will be described in detail later.

[0021] Referring to Figure 1 and Figure 3 , the valve assembly 1 includes a valve housing 101. One side of the valve housing 101 is fixedly communicated with an intake pipe 102, the other side of the valve housing 101 is fixedly communicated with an outlet pipe 103, the top of the valve housing 101 is fixedly connected with a pressure regulating assembly 104, and pressure gauges are fixedly connected to the backs of the intake pipe 102 and the outlet pipe 103.

[0022] In this embodiment, it should be specifically supplemented that the intake pipe 102 is connected to a high-pressure hydrogen pipeline, the outlet pipe 103 discharges the hydrogen after pressure reduction, the pressure gauge on the back of the intake pipe 102 is used to observe the hydrogen pressure before pressure reduction, and the pressure gauge on the back of the outlet pipe 103 is used to observe the hydrogen pressure after pressure reduction. The purpose is to make a comparison before and after pressure reduction and adjust the outlet pressure according to intuitive data.

[0023] Refer to Figure 4 , the pressure regulating component 104 includes a sealing cover 1041. At the top inside the sealing cover 1041, an adjusting rotating shaft 1042 is threadedly connected. One end of the adjusting rotating shaft 1042 is fixedly connected with a handle. On the surface of the middle part of the adjusting rotating shaft 1042, a toothed ring is fixedly connected. At the bottom of the toothed ring, a turntable 1043 is installed. The turntable 1043 meshes with the toothed ring. On the back of the turntable 1043, a rotating rod is rotatably connected. The rotating rod is fixedly connected to the inner wall of the sealing cover 1041. At the edge position on the front of the turntable 1043, a transmission member 1044 is rotatably connected. One end of the transmission member 1044 is rotatably sleeved with a moving rod 1045. One end of the transmission member 1044 is rotatably connected to the front of the turntable 1043 and the other end is rotatably sleeved at the top end of the moving rod 1045. The bottom end of the moving rod 1045 is fixedly connected with a valve core 2022. The side of the moving rod 1045 is movably sleeved with a sleeve. Both sides of the sleeve are fixedly connected with connecting plates. One end of the two connecting plates is fixedly connected to the inner wall of the sealing cover 1041.

[0024] In this embodiment, it should be specifically supplemented that the transmission member 1044 is composed of a round rod and a long strip. The tops of the two round rods are fixedly connected by a long strip, and the bottoms of the two round rods are fixedly connected by another long strip; By rotating the handle to drive the adjusting rotating shaft 1042, the adjusting rotating shaft 1042 fixes the state after rotation through threads. When the adjusting rotating shaft 1042 rotates, the turntable 1043 also rotates under the meshing relationship. The rotation of the turntable 1043 makes one end of the transmission member 1044 move in an arc, moving the other end of the transmission member 1044 downward, and then making the moving rod 1045 move downward. The sleeve movably sleeved on the side of the moving rod 1045 plays a role of a guide rail, ensuring that the moving rod 1045 moves up and down under the action of the force of the transmission member 1044 without deviation. When the handle rotates in the reverse direction, one end of the transmission member 1044 moves in a reverse arc, and the other end of the transmission member 1044 moves upward, and then the moving rod 1045 moves upward.

[0025] Refer to Figure 5 and Figure 6, the valve tube assembly 2 includes a hydrogen filtering assembly 201. Both ends of the hydrogen filtering assembly 201 are fixedly communicated with a valve housing 101. The top of the hydrogen filtering assembly 201 is fixedly communicated with a gas valve assembly 202. One end of the hydrogen filtering assembly 201 is fixedly sleeved with an electric heating ring sleeve 203. The other end of the hydrogen filtering assembly 201 is rotatably connected with a fan wheel 204. The fan wheel 204 is composed of an impeller and a rotating roller. The bottom of the impeller is fixedly connected with the rotating roller. The impeller is located inside the hydrogen filtering assembly 201. The rotating roller passes through the inner wall of the hydrogen filtering assembly 201 and is rotatably connected with the inner wall. A semi-circular block is fixedly connected at the joint of the hydrogen filtering assembly 201 and the inner wall of the valve housing 101.

[0026] In this embodiment, it should be specifically supplemented that the semi-circular block has the effect of guiding hydrogen to flow towards the edge part of the fan wheel 204, improving the effect of hydrogen blowing the fan wheel 204 to rotate.

[0027] Refer to Figures 7 to 9 , the hydrogen filtering assembly 201 includes an air flow tube 2011. There is a round opening at the top of the air flow tube 2011. There is a square opening at the bottom of the air flow tube 2011. An arc-shaped groove is provided on one side of the square opening. One end of the arc-shaped groove is movably sleeved with a sealing arc plate 2014. The top of one end of the sealing arc plate 2014 is fixedly connected with a fixing block 2013. The top of the fixing block 2013 is fixedly connected with a filter screen 2012. The filter screen 2012 is movably sleeved inside the air flow tube 2011 and the diameter of the filter screen 2012 is the same as the inner diameter of the air flow tube 2011. Circular grooves are provided at both ends of the other side of the square opening. Springs are fixedly connected inside both of the circular grooves. One end of both springs is fixedly connected to one side of the sealing arc plate 2014; The mesh holes of the filter screen 2012 are 30 - 50 um, preferably 45 um. Common metal impurities in high-pressure hydrogen (such as hydrogen supply for fuel cells, with a pressure usually of 10 - 30 MPa) are particles such as Fe, Ni, Cr generated by pipeline corrosion, and their particle sizes mostly concentrate in the range of 50 - 80 um, and some worn particles can reach more than 100 um. The filter screen 2012 is made of 316L stainless steel sintered mesh. The filter screen with a 45 um pore diameter has a tensile strength ≥ 200 MPa and can withstand the long-term impact of high-pressure hydrogen (such as 35 MPa) without deformation, avoiding impurity leakage caused by filter screen damage. The gap between the sealing arc plate 2014 and the square opening ≤ 5 um (sealing is achieved through spring pressure, with a leakage rate ≤ 5 NL / min, meeting the high-pressure hydrogen sealing requirements). When the filter screen moves, the gap size formed between the sealing arc plate and the square opening is 0.5 - 1.5 mm. When the gap is 0.5 mm, the flow rate of high-pressure hydrogen (20 MPa) can reach the speed of sound (about 310 m / s). At this time, the purging flow rate is sufficient to blow away particles larger than 50 um attached to the surface of the filter screen; In this embodiment, it should be specifically supplemented that in the original state, under the action of the spring tension, the sealing arc plate 2014 seals the square opening. When high-pressure hydrogen flows through the air flow pipe 2011, the filter screen 2012 filters the metal impurity particles in the high-pressure hydrogen on one side of the filter screen 2012 and adheres to one side of the filter screen 2012. After the hydrogen flows through the air flow pipe 2011 for a long time, the metal impurity particles begin to accumulate. When the metal impurity particles block the filter holes of the filter screen 2012, the hydrogen cannot pass through the filter screen 2012. Under the push of the high-pressure hydrogen, the filter screen 2012 begins to move, causing the sealing arc plate 2014 to move into the arc-shaped groove, and a gap is formed between the sealing arc plate 2014 and the square opening. Then the high-pressure hydrogen gushes out from the gap, making the propagation path of the high-pressure hydrogen perpendicular downward. The deflected high-pressure hydrogen blows away the metal impurity particles attached to the filter screen 2012 and is discharged from the square opening of the air flow pipe 2011 together with them.

[0028] Refer to Figure 10 , the air valve assembly 202 includes a valve seat 2021, and a valve core 2022 is movably sleeved on the top of the valve seat 2021. The valve core 2022 is composed of an upper cylindrical block and a lower cylindrical block. The bottom of the upper cylindrical block is fixedly connected to the lower cylindrical block. The diameter of the lower cylindrical block is the same as the diameter of the round opening at the top of the air flow pipe 2011. The diameter of the upper cylindrical block is 3-5 mm larger than the diameter of the lower cylindrical block. The length of the lower cylindrical block is the same as the pipe diameter of the air flow pipe 2011.

[0029] In this embodiment, it should be specifically supplemented that according to the above principle, when the grip is rotated to make the moving rod 1045 move downward, and then the valve core 2022 moves downward, the lower cylindrical block gradually falls into the air flow pipe 2011, so that the pipe orifice area of the air flow pipe 2011 gradually becomes smaller. When hydrogen passes through, due to the sudden reduction of the flow cross-sectional area, the flow velocity increases and the pressure decreases according to Bernoulli's principle. The pipe orifice area of the air flow pipe 2011 gradually becomes smaller and the pressure gradually decreases, so as to achieve the effect of regulating and reducing pressure. The purpose of the diameter of the upper cylindrical block being larger than that of the lower cylindrical block is that when the lower cylindrical block completely falls into the air flow pipe 2011, the bottom of the upper cylindrical block further blocks the round opening, increasing the sealing performance between the lower cylindrical block and the round opening and preventing hydrogen from leaking.

[0030] Refer to Figure 11, the heating component 3 includes a magnetic cutting element 301. The inner side of the magnetic cutting element 301 is rotatably sleeved on the side of the roller of the fan wheel 204. A runner 302 is fixedly connected to the bottom of the roller. One end of the inner side of the bottom of the valve housing 101 is fixedly communicated with a magnetic cylinder 303. The magnetic cutting element 301 and the runner 302 are both inside the magnetic cylinder 303. The magnetic cutting element 301 is composed of two conductor rings and two conductor frames. The two conductor rings are rotatably sleeved on the roller. Conductor frames are electrically connected to both sides of the two conductor rings. A brush 304 is installed at the top of one side of the conductor ring. The brush 304 is fixedly connected to the bottom of the air flow pipe 2011. The brush 304 is movably and electrically connected to the conductor ring located at the top of the magnetic cutting element 301. One side of the brush 304 is electrically connected to a wire. One end of the wire is electrically connected to the electric heating ring sleeve 203.

[0031] In this embodiment, it should be specifically supplemented that when high-pressure hydrogen flows through the air flow pipe 2011, the high-pressure hydrogen drives the fan wheel 204 to rotate, and then drives the runner 302 to rotate to form wind force. The wind force adsorbs the metal impurity particles discharged from the air flow pipe 2011 into the magnetic cylinder 303 and is adsorbed on the inner wall by the magnetic force of the magnetic cylinder 303. The metal impurity particles adhere to the inner wall of the magnetic cylinder 303, solving the problem that the metal impurity particles in the pressure reducing valve pipeline impact the valve core and valve seat with the high-speed hydrogen flow, resulting in grooved erosion marks on the sealing surface of the valve seat. The metal impurity particles adhering to the magnetic cylinder can be recycled, avoiding waste of resources; The fan wheel 204 rotates, driving the magnetic cutting element 301 to rotate, so that the magnetic cutting element 301 cuts the magnetic induction lines of the magnetic field formed by the magnetic cylinder 303, and then generates an electric current. The electric current is transmitted to the electric heating ring sleeve 203 through the wire and the brush 304, heating the outlet of the air flow pipe 2011, and avoiding the problem of frosting on the surface of the valve body outlet due to the Joule-Thomson effect when the high-pressure hydrogen undergoes throttling expansion.

[0032] A method for using a high-pressure hydrogen pressure reducing valve, using the above-mentioned high-pressure hydrogen pressure reducing valve, includes the following steps: S1. Rotate the grip to drive the adjustment rotating shaft 1042 to rotate. The adjustment rotating shaft 1042 fixes the state after rotating the adjustment rotating shaft 1042 through threads. When the adjustment rotating shaft 1042 rotates, the turntable 1043 also rotates under the meshing relationship. The rotation of the turntable 1043 makes one end of the transmission member 1044 move in an arc, moving the other end of the transmission member 1044 downward, and then making the moving rod 1045 move downward. The sleeve sleeved on the side of the moving rod 1045 acts as a guide rail to ensure that the moving rod 1045 moves up and down under the force of the transmission member 1044 without deviation. When the grip rotates in the reverse direction, one end of the transmission member 1044 moves in a reverse arc, and the other end of the transmission member 1044 moves upward, and then makes the moving rod 1045 move upward; S2. When the grip is rotated to move the moving rod 1045 downward, and then the valve core 2022 is moved downward, the lower cylindrical block gradually falls into the air flow pipe 2011, so that the nozzle area of the air flow pipe 2011 gradually becomes smaller. When hydrogen passes through, due to the sudden reduction of the flow cross-sectional area, the flow velocity increases and the pressure decreases according to Bernoulli's principle. The nozzle area of the air flow pipe 2011 gradually becomes smaller and the pressure gradually decreases, thus achieving the effect of regulating and reducing pressure. S3. In the original state, under the action of the spring tension, the sealing arc plate 2014 seals the square opening. When high-pressure hydrogen flows through the air flow pipe 2011, the filter screen 2012 filters out the metal impurity particles in the high-pressure hydrogen on one side of the filter screen 2012 and adheres to one side of the filter screen 2012. After hydrogen flows through the air flow pipe 2011 for a long time, the metal impurity particles begin to accumulate. When the filter holes of the filter screen 2012 are blocked by the metal impurity particles, hydrogen cannot pass through the filter screen 2012. Under the push of the high-pressure hydrogen, the filter screen 2012 begins to move, causing the sealing arc plate 2014 to move into the arc-shaped groove. A gap is formed between the sealing arc plate 2014 and the square opening, and the high-pressure hydrogen gushes out from the gap, making the propagation path of the high-pressure hydrogen perpendicular downward. The deflected high-pressure hydrogen blows away the metal impurity particles attached to the filter screen 2012 and is discharged from the square opening of the air flow pipe 2011 together. S4. When high-pressure hydrogen flows through the air flow pipe 2011, the high-pressure hydrogen drives the fan wheel 204 to rotate, and then drives the runner 302 to rotate to form wind power. The wind power adsorbs the metal impurity particles discharged from the air flow pipe 2011 into the magnetic cylinder 303 and is adsorbed on the inner wall by the magnetic force of the magnetic cylinder 303. The metal impurity particles adhere to the inner wall of the magnetic cylinder 303, solving the problem that the metal impurity particles in the pressure reducing valve pipeline impact the valve core and the valve seat with the high-speed hydrogen flow, resulting in groove-shaped erosion marks on the sealing surface of the valve seat. The metal impurity particles attached to the magnetic cylinder can be recycled, avoiding waste of resources. S5. The fan wheel 204 rotates, driving the magnetic cutting element 301 to rotate, so that the magnetic cutting element 301 cuts the magnetic induction lines of the magnetic field formed by the magnetic cylinder 303, and then generates an electric current. The electric current is transmitted to the electric heating ring sleeve 203 through the wire and the carbon brush 304, heating the outlet of the air flow pipe 2011, and avoiding the problem of frosting on the surface of the valve body outlet due to the Joule-Thomson effect when high-pressure hydrogen undergoes throttling expansion.

[0033] Finally, several points should be noted: First, in the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. It can be a mechanical connection or an electrical connection, or the communication inside two components. It can be directly connected. "Up", "down", "left", "right", etc. are only used to represent the relative position relationship. When the absolute position of the described object changes, the relative position relationship may change. Secondly: In the attached drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved. For other structures, reference may be made to the usual designs. Without conflict, the same embodiment and different embodiments of the present invention may be combined with each other; Finally: The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-pressure hydrogen pressure reducing valve, comprising a valve pipe assembly (2), characterized in that, The valve tube assembly (2) includes a hydrogen filtration assembly (201). Both ends of the hydrogen filtration assembly (201) are fixedly communicated with a valve housing (101). The top of the hydrogen filtration assembly (201) is fixedly communicated with a gas valve assembly (202). One end of the hydrogen filtration assembly (201) is fixedly sleeved with an electric heating ring sleeve (203). The other end of the hydrogen filtration assembly (201) is rotatably connected with a fan wheel (204). A magnetic cutting element (301) is rotatably sleeved on the side of the fan wheel (204). A runner (302) is fixedly connected to the bottom of the fan wheel (204). One end of the inner side of the bottom of the valve housing (101) is fixedly communicated with a magnetic cylinder (303). The hydrogen filtration assembly (201) and the runner (302) cooperate to remove metal impurity particles in hydrogen. Under the combined action of the hydrogen filtration assembly (201) and the magnetic cylinder (303), metal impurity particles are removed. The fan wheel (204) makes the electric heating ring sleeve (203) inhibit frosting on the surface of the valve body outlet through the cooperation of the magnetic cutting element (301) and the magnetic cylinder (303).

2. The high-pressure hydrogen pressure reducing valve according to claim 1, characterized in that: Both ends of the valve tube assembly (2) are fixedly communicated with a valve assembly (1) and are fixedly communicated inside the valve assembly (1). A heating assembly (3) is installed at the bottom of the valve tube assembly (2). The heating assembly (3) is fixedly communicated with the inner side of the bottom of the valve assembly (1).

3. The high-pressure hydrogen pressure reducing valve according to claim 2, characterized in that: The valve assembly (1) includes a valve housing (101). An air inlet pipe (102) is fixedly communicated with one side of the valve housing (101). An air outlet pipe (103) is fixedly communicated with the other side of the valve housing (101). A pressure regulating assembly (104) is fixedly connected to the top of the valve housing (101). Pressure gauges are fixedly connected to the backs of the air inlet pipe (102) and the air outlet pipe (103).

4. The high-pressure hydrogen pressure reducing valve according to claim 3, characterized in that: The pressure regulating assembly (104) includes a sealing cover (1041). A regulating rotating shaft (1042) is threadedly connected to the top inside the sealing cover (1041). A handle is fixedly connected to one end of the regulating rotating shaft (1042). A gear ring is fixedly connected to the surface of the middle part of the regulating rotating shaft (1042). A turntable (1043) is installed at the bottom of the gear ring. The turntable (1043) meshes with the gear ring. A rotating rod is rotatably connected to the back of the turntable (1043). The rotating rod is fixedly connected to the inner wall of the sealing cover (1041). A transmission member (1044) is rotatably connected to the edge position of the front surface of the turntable (1043). One end of the transmission member (1044) is rotatably sleeved with a moving rod (1045). One end of the transmission member (1044) is rotatably connected to the front surface of the turntable (1043) and the other end is rotatably sleeved on the top end of the moving rod (1045). The bottom end of the moving rod (1045) is fixedly connected to a valve core (2022). A sleeve is movably sleeved on the side of the moving rod (1045). Connecting plates are fixedly connected to both sides of the sleeve. One end of each of the two connecting plates is fixedly connected to the inner wall of the sealing cover (1041).

5. The high-pressure hydrogen pressure reducing valve according to claim 4, wherein: The fan wheel (204) is composed of an impeller and a rotating roller. The bottom of the impeller is fixedly connected to the rotating roller. The impeller is located inside the hydrogen filtration assembly (201). The rotating roller passes through the inner wall of the hydrogen filtration assembly (201) and is rotatably connected to the inner wall. A semi-circular block is fixedly connected at the connection between the hydrogen filtration assembly (201) and the inner wall of the valve housing (101).

6. The high-pressure hydrogen pressure reducing valve according to claim 5, characterized in that: The hydrogen filtration assembly (201) includes an air flow pipe (2011). A round opening is provided at the top of the air flow pipe (2011), and a square opening is provided at the bottom of the air flow pipe (2011). An arc-shaped groove is provided on one side of the square opening. One end of the arc-shaped groove is movably sleeved with a sealing arc plate (2014). A fixing block (2013) is fixedly connected to the top of one end of the sealing arc plate (2014). A filter screen (2012) is fixedly connected to the top of the fixing block (2013). The filter screen (2012) is movably sleeved inside the air flow pipe (2011), and the diameter of the filter screen (2012) is the same as the inner diameter of the air flow pipe (2011).

7. A high-pressure hydrogen pressure reducing valve according to claim 6, characterized in that: Round grooves are provided at both ends of the other side of the square opening. Springs are fixedly connected inside both of the round grooves. One end of each of the two springs is fixedly connected to one side of the sealing arc plate (2014).

8. A high-pressure hydrogen pressure reducing valve according to claim 7, characterized in that: The air valve assembly (202) includes a valve seat (2021). A valve core (2022) is movably sleeved on the top of the valve seat (2021). The valve core (2022) is composed of an upper cylindrical block and a lower cylindrical block. The lower cylindrical block is fixedly connected to the bottom of the upper cylindrical block. The diameter of the lower cylindrical block is the same as the diameter of the round opening at the top of the air flow pipe (2011). The diameter of the upper cylindrical block is 3 - 5 mm larger than the diameter of the lower cylindrical block. The length of the lower cylindrical block is the same as the inner diameter of the air flow pipe (2011).

9. The high-pressure hydrogen pressure reducing valve according to claim 8, characterized in that: The heating assembly (3) includes a magnetic cutting element (301). The magnetic cutting element (301) and the runner (302) are both inside the magnetic cylinder (303). The magnetic cutting element (301) is composed of two conductor rings and two conductor frames. The two conductor rings are rotatably sleeved on the rotating roller. Conductor frames are electrically connected to both sides of the two conductor rings. A carbon brush (304) is installed at the top of one side of the conductor ring. The carbon brush (304) is fixedly connected to the bottom of the air flow pipe (2011). The carbon brush (304) is movably and electrically connected to the conductor ring located at the top of the magnetic cutting element (301). A wire is electrically connected to one side of the carbon brush (304). One end of the wire is electrically connected to an electric heating ring sleeve (203).

10. A method for using a high-pressure hydrogen pressure reducing valve, which uses a high-pressure hydrogen pressure reducing valve as described in claim 9, characterized in that, Including the following steps: S1. Rotate the grip to drive the adjustment rotating shaft (1042) to rotate. After the adjustment rotating shaft (1042) is fixed in a rotating state by threads, when the adjustment rotating shaft (1042) rotates, the turntable (1043) also rotates under the meshing relationship. The rotation of the turntable (1043) causes one end of the transmission part (1044) to move in an arc, moving the other end of the transmission part (1044) downward, and further causing the moving rod (1045) to move downward. The sleeve sleeved on the side of the moving rod (1045) acts as a guide rail to ensure that the moving rod (1045) moves up and down under the action of the force of the transmission part (1044) without deviation. When the grip rotates in the reverse direction, one end of the transmission part (1044) moves in a reverse arc, and the other end of the transmission part (1044) moves upward, and further causes the moving rod (1045) to move upward; S2. When the grip is rotated to make the moving rod (1045) move downward, the valve core (2022) is further caused to move downward, making the lower cylindrical block gradually fall into the air flow pipe (2011), thereby gradually reducing the pipe orifice area of the air flow pipe (2011). When hydrogen passes through, due to the sudden reduction of the flow cross-sectional area, the flow rate increases and the pressure decreases. The pipe orifice area of the air flow pipe (2011) gradually becomes smaller and the pressure gradually decreases, thus achieving the effect of adjusting and reducing the pressure; S3. In the original state, under the action of the spring tension, the sealing arc plate (2014) seals the square opening. When high-pressure hydrogen flows through the air flow pipe (2011), the filter screen (2012) filters the metal impurity particles in the high-pressure hydrogen on one side of the filter screen (2012) and adheres to one side of the filter screen (2012). After hydrogen has flowed through the air flow pipe (2011) for a long time, the metal impurity particles begin to accumulate. When the metal impurity particles block the filter holes of the filter screen (2012), hydrogen cannot pass through the filter screen (2012). Under the push of the high-pressure hydrogen, the filter screen (2012) begins to move, causing the sealing arc plate (2014) to move into the arc-shaped groove. A gap is formed between the sealing arc plate (2014) and the square opening, and the high-pressure hydrogen then gushes out from the gap, making the propagation path of the high-pressure hydrogen vertically downward. The deflected high-pressure hydrogen blows away the metal impurity particles attached to the filter screen (2012) and is discharged from the square opening together with the air flow pipe (2011); S4. When high-pressure hydrogen flows through the air flow pipe (2011), the high-pressure hydrogen drives the fan wheel (204) to rotate, and then drives the runner (302) to rotate to form wind power. The wind power adsorbs the metal impurity particles discharged from the air flow pipe (2011) into the magnetic cylinder (303) and is adsorbed on the inner wall by the magnetic force of the magnetic cylinder (303). The metal impurity particles adhere to the inner wall of the magnetic cylinder (303); S5. The fan wheel (204) rotates, driving the magnetic cutting element (301) to rotate, causing the magnetic cutting element (301) to cut the magnetic induction lines of the magnetic field formed by the magnetic cylinder (303), and then generating an electric current. The electric current is transmitted to the electric heating ring sleeve (203) through the wire and the carbon brush (304) to heat the outlet of the air flow pipe (2011).

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