Skid-type natural gas and hydrogen mixing system

Abstract

The utility model relates to a prying type natural gas and hydrogen mixing system which comprises a base and a mixer fixed on the base, the mixer comprises a barrel, a mixed gas output assembly and a natural gas input assembly are correspondingly arranged at the left end and the right end of the barrel, a hydrogen input assembly is arranged on one side of the middle of the barrel, and the natural gas input assembly comprises a right cover. The right cover is provided with a natural gas input pipe fitting, the outer end of the natural gas input pipe fitting is connected with a natural gas input pipeline, the inner end of the natural gas input pipe fitting is provided with a first blind plate, the first blind plate is provided with a first pneumatic silencer, the hydrogen input assembly comprises a hydrogen input pipe fitting, and the outer end of the hydrogen input pipe fitting is connected with a hydrogen input pipeline; a second blind plate is arranged at the inner end of the hydrogen input pipe fitting, a second pneumatic silencer is arranged on the second blind plate, the mixed gas output assembly comprises a left cover, a mixed gas output pipe fitting is arranged on the left cover, and the outer end of the mixed gas output pipe fitting is connected with a mixed gas output pipeline. The device has the advantages of being compact in structure, convenient to disassemble and assemble and good in mixing effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to a gas mixing device, concretely relates to a pry type natural gas hydrogen blending system. BACKGROUND

[0002] Under the background of human pursuit of sustainable development and clean energy, natural gas hydrogen blending technology gradually attracts widespread attention. This technology can reduce carbon emissions during combustion, improve energy utilization efficiency, and help solve the problem of large-scale and long-distance hydrogen transportation by blending hydrogen into natural gas. Natural gas hydrogen blending pipelines require blending devices to mix natural gas and hydrogen. The mixer is such a device that uses internal mixing components to change the flow state of the fluid to achieve the purpose of dispersion and mixing between different fluids. The mixing components of the existing mixer usually adopt corrugated sheet or spiral plate structure, which not only causes the overall structure to be relatively complex and the manufacturing difficulty to be relatively large, but also makes it inconvenient to replace and maintain when the mixing components are damaged. SUMMARY

[0003] The utility model aims at providing a pry type natural gas hydrogen blending system which has the advantages of compact structure, convenient disassembly and assembly, good blending effect, safety and reliability, and strong practicality.

[0004] To solve the above problems in the prior art, the utility model provides a pry type natural gas hydrogen blending system, which comprises a base and a mixer fixed on the base. The mixer comprises a cylinder body. A natural gas input assembly and a mixed gas output assembly are arranged at the left and right ends of the cylinder body respectively. A hydrogen input assembly is arranged at one side of the middle part of the cylinder body. The natural gas input assembly comprises a right cover which is detachably and sealingly fixed at the right end of the cylinder body. A natural gas input pipe is sealingly welded to the right cover. The outer end of the natural gas input pipe is connected with a natural gas input pipeline which is fixed on the base. The inner end of the natural gas input pipe is sealingly fixed with a first blind plate. A plurality of first pneumatic silencers are arranged on the first blind plate and communicate with the natural gas input pipe and the inner cavity of the cylinder body. The hydrogen input assembly comprises a hydrogen input pipe which is sealingly welded to the cylinder body. The outer end of the hydrogen input pipe is connected with a hydrogen input pipeline which is fixed on the base. The inner end of the hydrogen input pipe is sealingly fixed with a second blind plate. A plurality of second pneumatic silencers are arranged on the second blind plate and communicate with the hydrogen input pipe and the inner cavity of the cylinder body. The mixed gas output assembly comprises a left cover which is detachably and sealingly fixed at the left end of the cylinder body. A mixed gas output pipe is sealingly welded to the left cover. The inner end of the mixed gas output pipe communicates with the inner cavity of the cylinder body. The outer end of the mixed gas output pipe is connected with a mixed gas output pipeline which is fixed on the base.

[0005] Furthermore, this utility model discloses a skid-mounted natural gas-hydrogen blending system, wherein the natural gas input pipeline is equipped with a natural gas filter, a natural gas pressure regulating valve, and a natural gas meter; the hydrogen input pipeline is equipped with a hydrogen filter, a hydrogen pressure regulating valve, a hydrogen meter, and a hydrogen flow regulating valve; and the mixed gas output pipeline is equipped with a mixed gas pressure regulator. A spaced-apart silencer plate is provided in the cylinder, located on the left side of the hydrogen input pipe, with uniformly distributed silencer holes on the silencer plate, and the silencer holes on adjacent silencer plates are staggered.

[0006] Furthermore, this utility model discloses a skid-mounted natural gas-hydrogen blending system, wherein a first flange is welded to the right end of the cylinder, and a second flange matching the first flange is welded to the right cover. The second flange and the first flange are fixed by bolts, and a metal spiral wound gasket is provided between them. The natural gas input pipe includes a short pipe and a tapered pipe coaxially welded together. The ends of the short pipe and the tapered pipe are correspondingly welded with a third flange and a fourth flange. The first blind plate is fixed to the fourth flange by bolts, and a metal spiral wound gasket is provided between the first blind plate and the fourth flange. The first pneumatic silencer is installed on the first blind plate by threads.

[0007] Furthermore, this utility model discloses a skid-mounted natural gas-hydrogen blending system, wherein a fifth flange and a sixth flange are welded to both ends of the hydrogen input pipe, a second blind flange is fixed to the sixth flange by bolts and a metal spiral wound gasket is provided between the two, and a second pneumatic silencer is threaded onto the second blind flange; a seventh flange is welded to the left end of the cylinder, an eighth flange is welded to the left cover, the eighth flange and the seventh flange are fixed by bolts and a metal spiral wound gasket is provided between the two; and a ninth flange is welded to the outer end of the mixed gas output pipe.

[0008] Furthermore, this utility model discloses a skid-mounted natural gas-hydrogen blending system, wherein the hydrogen pressure regulating valve includes a right valve body, a middle valve body, a left valve body, and a pressure regulating assembly. The right valve body has an inlet channel along its axis, and an annular connecting portion is provided in the middle of the outer side of the right valve body. A valve disc and a guide sleeve are sealed and fixed at the left end of the right valve body. The valve disc has vent holes distributed circumferentially, and a pressure regulating air passage is formed between the guide sleeve and the valve disc. The middle valve body is cylindrical, and its right end is coaxially and sealed and fixedly connected to the connecting portion of the right valve body. The left valve body has an outlet channel along its axis. The right end of the left valve body is coaxially and sealed to the left end of the middle valve body. The pressure regulating assembly includes a piston and a valve cylinder. The piston is located between the guide sleeve and the left valve body and is slidably and sealed to the middle valve body. The valve cylinder is sealed and fixed in the middle of the piston. The right half of the valve cylinder is located in the guide sleeve and the two are slidably and sealed to each other. The left half of the valve cylinder is located in the left valve body and the two are slidably and sealed to each other. The space between the piston and the right valve body is the inflation chamber. The space between the piston and the left valve body is the feedback chamber. The feedback chamber is connected to the air outlet channel through the feedback channel provided in the left valve body.

[0009] Further, the utility model discloses a pry type natural gas hydrogen gas mixing system, wherein, the connecting portion position of right valve body is equipped with the vertical inflation channel that communicates with the air inlet channel, and the transverse inflation channel that communicates with the inflation cavity, and the communication position of transverse inflation channel and vertical inflation channel is equipped with the inflation valve for controlling both on-off, be equipped with the exhaust passage that communicates inflation cavity and atmosphere on middle valve body, and the exhaust valve for controlling exhaust passage on-off.

[0010] Further, the utility model discloses a pry type natural gas hydrogen gas mixing system, wherein, the connecting portion of right valve body is equipped with the first step bore that is coaxial with vertical inflation channel, and the inflation valve is installed in the first step bore through screw thread, and the lower end of inflation valve is equipped with the first sealing washer that is extruded on the upper port four around vertical inflation channel, and middle valve body is equipped with the second step bore that is coaxial with exhaust passage, and the exhaust valve is installed in the second step bore through screw thread, and the lower end of exhaust valve is equipped with the second sealing washer that is extruded on the upper port four around exhaust passage, and the first sealing washer and second sealing washer adopt rubber to make.

[0011] Further, the utility model discloses a pry type natural gas hydrogen gas mixing system, wherein, the right end of left valve body is fixedly connected with the left end of middle valve body through screw, and left valve body is equipped with the positioning ring table that extends into middle valve body, and the outer peripheral wall on the right end face of positioning ring table and middle valve body is equipped with the first sealing ring that is extruded on middle valve body, and the second sealing ring and sealing ring are equipped between the right end face of positioning ring table and middle valve body, and the first sealing ring and second sealing ring adopt rubber to make, and sealing ring adopts polytetrafluoroethylene to make.

[0012] Further, the utility model discloses a pry type natural gas hydrogen gas mixing system, wherein, the connecting portion of right valve body is fixedly connected with the right end of middle valve body through screw, and the right end of middle valve body is installed with the third sealing ring that is extruded on connecting portion and adopts rubber to make, and the guide sleeve is fixed in the left end of right valve body through screw, and the valve flap is clamped between right valve body and guide sleeve, and the first sealing piece is clamped between right valve body, valve flap and guide sleeve, and the left side of valve flap is fixed with the second sealing piece that cooperates with valve cylinder through screw and pressure disc.

[0013] Further, the utility model discloses a pry type natural gas hydrogen gas mixing system, wherein, the peripheral wall on valve cylinder is equipped with the limit ring, and the limit ring is clamped in the groove that is set on the right side of piston, and the pressure ring on the right side of limit ring is fixed on piston through screw, and the right end of right valve body is equipped with the air inlet end flange, and the air inlet end pressure gauge is installed on air inlet end flange, and the air inlet of air inlet end pressure gauge communicates with air inlet channel through air inlet pressure taking channel, and the right end of left valve body is equipped with the air outlet end flange, and the air outlet end pressure gauge is installed on air outlet end flange, and the air inlet of air outlet end pressure gauge communicates with air outlet channel through air outlet pressure taking channel.

[0014] Compared with existing technologies, this utility model of a skid-mounted natural gas-hydrogen blending system has the following advantages: This utility model includes a base and a mixer fixed to the base. The mixer includes a cylinder with a mixed gas output component and a natural gas input component at its left and right ends respectively. A hydrogen input component is located on one side of the middle of the cylinder. The natural gas input component is equipped with a detachable and sealed right cover fixed to the right end of the cylinder. A natural gas input pipe is welded to the right cover, allowing the outer end of the natural gas input pipe to connect to a natural gas input pipeline fixed to the base. A first blind plate is sealed and fixed to the inner end of the natural gas input pipe, and multiple connecting pipes are provided on the first blind plate. The natural gas input pipe and the first pneumatic silencer in the inner cavity of the cylinder are arranged so that the hydrogen input component is equipped with a hydrogen input pipe that is sealed and welded to the cylinder. The outer end of the hydrogen input pipe is connected to the hydrogen input pipeline fixed on the base. The inner end of the hydrogen input pipe is sealed and fixed with a second blind plate. Multiple second pneumatic silencers connecting the hydrogen input pipe and the inner cavity of the cylinder are arranged on the second blind plate. The mixed gas output component is equipped with a left cover that is detachably sealed and fixed to the left end of the cylinder. The mixed gas output pipe is sealed and welded to the left cover. The inner end of the mixed gas output pipe is connected to the inner cavity of the cylinder. The outer end of the mixed gas output pipe is connected to the mixed gas output pipeline fixed on the base. This results in a compact, easy-to-assemble, well-blended, safe, reliable, and highly practical skid-mounted natural gas-hydrogen blending system. In practical applications, the natural gas input pipeline and the hydrogen input pipeline are connected to the natural gas source and the hydrogen source, respectively, and the mixed gas output pipeline is connected to the end user. Here, the natural gas source refers to piped natural gas, and the hydrogen source refers to bottled hydrogen. When the natural gas and hydrogen enter the cylinder through the natural gas input component and the hydrogen input component, they can be fully mixed. The mixed gas is then delivered to the end user through the mixed gas output component and the mixed gas output pipeline. This invention, by setting a base and fixing the mixer, natural gas input pipeline, hydrogen input pipeline, and mixed gas output pipeline to the base, forms an integrated skid-mounted structure, facilitating overall transportation and disassembly, thus improving operational convenience. By assembling the mixer into a cylinder, natural gas input component, hydrogen input component, and mixed gas output component, and by correspondingly equipping the natural gas and hydrogen input components with a first and a second pneumatic silencer, when natural gas and hydrogen flow through these silencers, noise reduction is achieved. Furthermore, the natural gas and hydrogen diffuse into the cylinder in a spray-like manner, promoting thorough mixing and improving the mixing effect.

[0015] The following describes in detail a skid-mounted natural gas-hydrogen blending system of the present invention with reference to the embodiments shown in the accompanying drawings. Attached Figure Description

[0016] Figure 1A front view structural schematic diagram of a pry type natural gas hydrogen gas mixing system of the utility model;

[0017] Figure 2 A view of A-A in Figure 1

[0018] Figure 3 A view of B-B in Figure 2

[0019] Figure 4 A sectional view of the mixer in the utility model;

[0020] Figure 5 A view of C in Figure 4

[0021] Figure 6 A view of D in Figure 4

[0022] A structure schematic diagram of the sound attenuation board in the utility model; Figure 7

[0023] A structure schematic diagram of the gas flowing through three sound attenuation boards; Figure 8

[0024] A sectional view of the hydrogen gas pressure regulating valve in the utility model; Figure 9

[0025] A local enlarged view of E position in Figure 10 Figure 9 Specific implementation

[0026] Firstly, it needs to be explained that the up, down, left, right, front, back and other orientation words in the utility model are only described according to the drawings for the convenience of understanding, and not limit the technical scheme and the protection scope of the utility model.

[0027] For example Figures 1 to 10 ​​​​​The utility model discloses a pry natural gas hydrogen gas system's specific implementation mode, including base 1 and fixed on base 1's mixer 2, wherein, mixer 2 includes cylinder 21, and the left and right ends of cylinder 21 are equipped with mixed gas output assembly and natural gas input assembly correspondingly, and one side of the middle part of cylinder 21 is equipped with hydrogen input assembly. Make natural gas input assembly set up detachable seal fixed right cover 22 in the right end of cylinder 21, seal weld natural gas input pipe fitting 23 on right cover 22, let natural gas input pipe fitting 23's outer end connect fixed on the natural gas input pipeline 3 of base 1, seal fixed first blind plate 24 in the inner end of natural gas input pipe fitting 23, and set up a plurality of first pneumatic muffler 241 that communicate natural gas input pipe fitting 23 and the inner chamber of cylinder 21 on first blind plate 24. Make hydrogen input assembly set up seal weld on the hydrogen input pipe fitting 25 of cylinder 21, let hydrogen input pipe fitting 25's outer end connect fixed on the hydrogen input pipeline 4 of base 1, seal fixed second blind plate 26 in the inner end of hydrogen input pipe fitting 25, and set up a plurality of second pneumatic muffler 261 that communicate hydrogen input pipe fitting 25 and the inner chamber of cylinder 21 on second blind plate 26. Make mixed gas output assembly set up detachable seal fixed left cover 27 in the left end of cylinder 21, seal weld mixed gas output pipe fitting 28 on left cover 27, let mixed gas output pipe fitting 28's inner end communicate with the inner chamber of cylinder 21, let mixed gas output pipe fitting 28's outer end connect fixed on the mixed gas output pipeline 5 of base 1.

[0028] The above setting constitutes a pry type natural gas hydrogen mixing system which is compact in structure, convenient to disassemble and assemble, good in mixing effect, safe and reliable, and high in practicability. In actual application, the natural gas input pipeline 3 and the hydrogen input pipeline 4 are correspondingly connected with a natural gas source and a hydrogen source, and the mixed gas output pipeline 5 is connected with a gas end, wherein the natural gas source refers to pipeline natural gas, and the hydrogen source refers to bottled hydrogen gas. When the natural gas and the hydrogen gas correspondingly pass through the natural gas input assembly and the hydrogen input assembly into the cylinder body 21, they can be fully mixed, and the mixed gas of the natural gas and the hydrogen gas is delivered to the gas end through the mixed gas output assembly and the mixed gas output pipeline 5. The base 1 is arranged, and the mixer 2, the natural gas input pipeline 3, the hydrogen input pipeline 4 and the mixed gas output pipeline 5 are fixed on the base 1, thereby forming an integrated pry type structure, so that the whole can be transported and disassembled, and the operation convenience is improved. The mixer 2 is provided with the cylinder body 21, the natural gas input assembly, the hydrogen input assembly and the mixed gas output assembly, and the natural gas input assembly and the hydrogen input assembly are correspondingly provided with the first pneumatic silencer 241 and the second pneumatic silencer 261. When the natural gas and the hydrogen gas correspondingly flow through the first pneumatic silencer 241 and the second pneumatic silencer 261, not only the noise reduction and silencing effect is achieved, but also the natural gas and the hydrogen gas form a spray state to diffuse into the cylinder body, the spray state of the natural gas and the hydrogen gas promotes the full mixing of the two, and the mixing effect is improved. At the same time, the detachable sealing and fixed connection mode between the natural gas input assembly and the cylinder body 21 improves the disassembly and assembly convenience, and when a component is damaged, it can be quickly replaced and repaired. Similarly, the detachable sealing and fixed connection mode between the mixed gas output assembly and the cylinder body improves the disassembly and assembly convenience. It should be noted that the pneumatic silencer is prior art in the field, and its structure, principle and working mode are well known to technicians. In order to prevent hydrogen embrittlement, the cylinder body 21, the natural gas input assembly, the hydrogen input assembly and the mixed gas output assembly are usually made of 316 / 316L stainless steel.

[0029] As an optimized solution, this specific embodiment includes a natural gas filter 31, a natural gas pressure regulating valve 32, and a natural gas meter 33 on the natural gas input pipeline 3; a hydrogen filter 41, a hydrogen pressure regulating valve 42, a hydrogen meter 43, and a hydrogen flow regulating valve 44 on the hydrogen input pipeline 4; and a mixed gas pressure regulator 51 on the mixed gas output pipeline 5. This configuration utilizes the natural gas filter 31 to remove impurities from the natural gas, the natural gas pressure regulating valve 32 to reduce the natural gas pressure from 1.6 MPa to 0.9 MPa, the natural gas meter 33 to detect the natural gas flow rate, the hydrogen filter 41 to remove impurities from the hydrogen, the hydrogen pressure regulating valve 42 to adjust bottled hydrogen from 20 MPa to 1.0 MPa, the hydrogen meter 43 to detect the hydrogen flow rate, the hydrogen flow regulating valve 44 to regulate the hydrogen flow rate, and the mixed gas pressure regulator 51 to stabilize the mixed gas pressure within a safe operating range. It should be noted that the natural gas filter 31, natural gas pressure regulating valve 32, natural gas meter 33, hydrogen filter 41, hydrogen meter 43, hydrogen flow regulating valve 44, and mixed gas pressure regulator 51 are all commonly used devices in the field, and their structures and principles are well known to those skilled in the art. As an optimized solution, this specific embodiment provides spaced-apart silencers 29 in the cylinder 21, located to the left of the hydrogen inlet pipe 25. The silencers 29 have evenly distributed silencer holes 291, with the silencer holes 291 on adjacent silencers 29 being staggered. This arrangement, utilizing the staggered silencer holes 291 on multiple silencers 29, enhances the noise reduction and silencing effect, as well as the mixing effect of natural gas and hydrogen. In practical applications, this invention typically uses three silencers 29.

[0030] As a specific way of detachable sealing fixation, the utility model discloses the right end of cylinder 21 is welded with first flange 211, and the second flange 221 matched with first flange 211 is welded on the right cover 22, and make second flange 221 and first flange 211 through bolt fixation and set up metal winding gasket between both, to guarantee the sealing between second flange 221 and first flange 211. Meanwhile, the specific embodiment makes natural gas input pipe fitting 23 set up coaxial welding's short pipe 231 and conical tube 232, and the third flange 233 and the fourth flange 234 are welded on the end of short pipe 231 and conical tube 232 correspondingly, wherein, first blind plate 24 is bolted on the fourth flange 234, and metal winding gasket is arranged between first blind plate 24 and fourth flange 234, and first pneumatic muffler 241 is installed on first blind plate 24 by screw thread. This structure is advantageous to natural gas diffusion by setting conical tube 232 to mix with hydrogen, and the convenience of connecting natural gas input pipe fitting 23 with natural gas input pipeline 3 is improved by setting third flange 233, and the convenience of connecting natural gas input pipe fitting 23 with first blind plate 24 is improved by setting fourth flange 234, and the dismounting convenience is improved by installing first pneumatic muffler 241 by screw thread. Similarly, the fifth flange 251 and the sixth flange 252 are welded on the both ends of hydrogen input pipe fitting 25 correspondingly in the specific embodiment, wherein, second blind plate 26 is bolted on the sixth flange 252 and metal winding gasket is arranged between both, and second pneumatic muffler 261 is installed on second blind plate 26 by screw thread. This structure improves the convenience of connecting hydrogen input pipe fitting 25 with hydrogen input pipeline 4 by setting fifth flange 251, and the convenience of connecting hydrogen input pipe fitting 25 with second blind plate 26 is improved by setting sixth flange 252. Similarly, the seventh flange 212 is welded on the left end of cylinder 21 in the specific embodiment, and the eighth flange 271 is welded on the left cover 27, and the eighth flange 271 and the seventh flange 212 are bolted, and metal winding gasket is arranged between both to guarantee sealing reliability, and the ninth flange 281 is welded on the outer end of mixed gas output pipe fitting 28 to improve the convenience of connecting mixed gas output pipe fitting 28 with mixed gas output pipeline 5.

[0031] As an optimization scheme, the specific embodiment makes the hydrogen pressure regulating valve 42 adopt the following structure: including a right valve body 421, a middle valve body 422, a left valve body 423 and a pressure regulating assembly. The right valve body 421 is provided with an air inlet channel 4211 along an axis, an annular connecting part 4212 is arranged at the middle part of the outer side of the right valve body 421, a valve flap 424 and a guide sleeve 425 are sealingly and fixedly arranged at the left end of the right valve body 421, the valve flap 424 is provided with air holes 4241 distributed along the circumference, and a pressure regulating air channel 426 is formed between the guide sleeve 425 and the valve flap 424. The middle valve body 422 adopts a cylindrical structure, and the right end of the middle valve body 422 is sealingly and fixedly connected with the connecting part 4212 of the right valve body 421 in a coaxial manner. The left valve body 423 is provided with an air outlet channel 4231 along an axis, and the right end of the left valve body 423 is sealingly and fixedly connected with the left end of the middle valve body 422 in a coaxial manner. The pressure regulating assembly is provided with a piston 427 and a valve cylinder 428, the piston 427 is slidingly and sealingly matched with the middle valve body 422 and arranged between the guide sleeve 425 and the left valve body 423, the valve cylinder 428 is sealingly and fixedly arranged at the middle part of the piston 427, the right half of the valve cylinder 428 is slidingly and sealingly matched with the guide sleeve 425, the left half of the valve cylinder 428 is slidingly and sealingly matched with the left valve body 423, a charging cavity 429 is formed between the piston 427 and the right valve body 421, a feedback cavity 4210 is formed between the piston 427 and the left valve body 423, and the feedback cavity 4210 is communicated with the air outlet channel 4231 through a feedback channel 4232 arranged in the left valve body 423. Through the above structure, an axial flow type pressure regulator is formed, when high-pressure hydrogen gas flows through the air holes 4241 of the valve flap 424, the pressure regulating air channel 426 and the valve cylinder 428 in sequence, the high-pressure hydrogen gas becomes low-pressure hydrogen gas, and in this process, the pressure of the charging cavity 429 remains unchanged, when the pressure in the air outlet channel 4231 decreases, the pressure in the feedback cavity 4210 decreases accordingly, at this time, the piston 427 moves left with the valve cylinder 428, the left movement of the valve cylinder 428 increases the pressure regulating air channel 426, and correspondingly, the pressure in the air outlet channel 4231 increases, so that the pressure regulating and pressure stabilizing purposes are achieved; the working process when the pressure in the air outlet channel 4231 increases is opposite to the above process. The present utility model is composed of the right valve body 421, the middle valve body 422 and the left valve body 423, which can reduce the structure and the manufacturing difficulty, and can effectively reduce the noise; the pressure regulating movable component is composed of the piston 427 and the valve cylinder 428, compared with the pressure regulator adopting a diaphragm as the pressure regulating movable component, the structure strength and the durability are effectively improved, and the use requirement of the durability of the high-pressure hydrogen pressure regulating can be fully met. In actual application, the right valve body 421, the middle valve body 422, the left valve body 423, the valve flap 424, the guide sleeve 425, the piston 427 and the valve cylinder 428 are usually made of austenitic stainless steel, so that the hydrogen embrittlement phenomenon is avoided.

[0032] As the specific embodiment, the utility model discloses the position of the connecting portion 4212 of right valve body 421 set up with the vertical gas filling channel 4213 that communicates with the air inlet channel 4211, and the horizontal gas filling channel 4214 that communicates with the gas filling cavity 429, and set up the gas filling valve 4215 for controlling the on-off of both in the communication position of horizontal gas filling channel 4214 and vertical gas filling channel 4213, simultaneously, still set up the exhaust channel 4221 that communicates the gas filling cavity 429 and atmosphere on the middle valve body 422, and the exhaust valve 4222 for controlling the on-off of exhaust channel 4221.This setting fills certain pressure hydrogen in the gas filling cavity 429 through vertical gas filling channel 4213, horizontal gas filling channel 4214 and gas filling valve 4215, and the hydrogen in the gas filling cavity 429 can be discharged to reduce the pressure through exhaust channel 4221 and exhaust valve 4222, improve the operation convenience.As the optimization scheme, the gas filling valve 4215 and exhaust valve 4222 in this specific embodiment adopt the following installation sealing mode: set up the first step hole coaxial with vertical gas filling channel 4213 on the connecting portion 4212 of right valve body 421, install the gas filling valve 4215 in the first step hole through screw thread, and set up the first sealing pad extruded on the upper end port of vertical gas filling channel 4213 on the lower end of gas filling valve 4215;Similarly, set up the second step hole coaxial with exhaust channel 4221 on the middle valve body 422, install the exhaust valve 4222 in the second step hole through screw thread, and set up the second sealing pad extruded on the upper end port of exhaust channel 4221 on the lower end of exhaust valve 4222, and make the first sealing pad and second sealing pad adopt rubber.This setting can seal vertical gas filling channel 4213 through the first sealing pad by screwing the gas filling valve 4215 to cut off the path between horizontal gas filling channel 4214 and vertical gas filling channel 4213, on the contrary, only need to loosen the gas filling valve 4215 to make horizontal gas filling channel 4214 and vertical gas filling channel 4213 communicate and realize the purpose of filling hydrogen in the gas filling cavity 429;The working principle and operation process of exhaust valve 4222 are same with gas filling valve 4215.It is need to point out that, for realizing the exhaust purpose, should set up the exhaust groove on the second step hole wall.Compared with the hard sealing used by the existing pressure regulator filling and exhaust needle valve, the utility model makes the gas filling valve 4215 and exhaust valve 4222 adopt soft sealing, improves the sealing reliability.

[0033] As a specific embodiment, the right end of the left valve body 423 is fixedly connected with the left end of the middle valve body 422 through screws, so as to improve the dismounting convenience, and the positioning ring table 4233 of the left valve body 423 is arranged to extend into the middle valve body 422, so as to realize the assembly positioning purpose, and the first sealing ring is arranged on the outer circumferential wall of the positioning ring table 4233 and extruded on the middle valve body 422, so as to ensure the sealing reliability. Meanwhile, the second sealing ring and the sealing ring are arranged between the right end surface of the positioning ring table 4233 and the middle valve body 422, wherein the first sealing ring and the second sealing ring are made of rubber, and the sealing ring is made of polytetrafluoroethylene. The sealing structure of the second sealing ring and the sealing ring is adopted, and the sealing ring is made of polytetrafluoroethylene, so as to ensure the sealing reliability between the sealing ring and the piston 427. Since the polytetrafluoroethylene has no elasticity, the second sealing ring and the sealing ring are arranged between the positioning ring table 4233 and the middle valve body 422, compared with the existing sealing structure (the sealing ring is arranged on the circumferential wall of the piston 427), on the one hand, the assembly convenience is improved, and on the other hand, the machining difficulty is reduced, and the inner wall of the middle valve body does not need to be polished. As a specific embodiment, the right valve body 421 and the middle valve body 422 adopt the following connection and fixing mode: the connecting portion 4212 of the right valve body 421 is fixedly connected with the right end of the middle valve body 422 through screws, so as to improve the dismounting convenience, and the third sealing ring made of rubber is arranged on the right end of the middle valve body 422 and extruded on the connecting portion 4212, so as to ensure the sealing performance between the two. As a specific embodiment, the guide sleeve 425 is also fixedly arranged on the left end of the right valve body 421 through screws, and the valve clack 424 is clamped between the right valve body 421 and the guide sleeve 425, so as to improve the dismounting convenience, and the first sealing member is clamped between the right valve body 421, the valve clack 424 and the guide sleeve 425, and the second sealing member cooperating with the valve cylinder 428 is fixed on the left side of the valve clack 424 through screws and a pressure plate.

[0034] In practical application, the valve cylinder 428 and the piston 427 adopt the following fixing mode: a limiting ring 4281 is arranged on the peripheral wall of the valve cylinder 428, the limiting ring 4281 is clamped in the groove arranged on the right side of the piston 427, and a pressing ring 4271 is arranged on the right side of the limiting ring 4281 and is fixed on the piston 427 through a screw. The arrangement has the characteristics of simple structure and convenient disassembly and assembly. In order to ensure the sealing property between the valve cylinder 428 and the piston 427, a sealing structure should be arranged between the valve cylinder 428 and the piston 427, and the sealing structure can adopt a structure form such as a sealing ring or a sealing gasket. In order to facilitate installation and connection, the utility model sets an air inlet end flange 4216 on the right end of the right valve body 421, and sets an air inlet end pressure gauge 4217 on the air inlet end flange 4216, and makes the air inlet of the air inlet end pressure gauge 4217 communicate with the air inlet channel 4211 through an air inlet pressure taking channel 4218, so as to intuitively understand the pressure in the air inlet channel 4211 through the air inlet end pressure gauge 4217. Similarly, the utility model sets an air outlet end flange 4234 on the right end of the left valve body 423, and sets an air outlet end pressure gauge 4235 on the air outlet end flange 4234, and makes the air inlet of the air outlet end pressure gauge 4235 communicate with the air outlet channel 4231 through an air outlet pressure taking channel 4236, so as to intuitively understand the pressure in the air outlet channel 4231 through the air outlet end pressure gauge 4235. In addition, it should be pointed out that, as a specific structure of sliding sealing cooperation, an O-shaped ring extruded on the valve cylinder 428 should be installed on the inner wall of the guide sleeve 425 and the left valve body 423 through a sealing groove.

[0035] The above embodiments are only used for describing the preferred embodiments of the utility model, and do not limit the protection scope of the utility model. Various modifications made by the person skilled in the art according to the technical scheme of the utility model should fall within the protection scope of the utility model.

Claims

1. A prying natural gas blending hydrogen system characterized by, The utility model relates to a natural gas and hydrogen mixed gas production device, including base (1) and fixed mixer (2) on base (1), mixer (2) includes cylinder (21), and the left and right ends of cylinder (21) are equipped with mixed gas output assembly and natural gas input assembly, and one side of the middle part of cylinder (21) is equipped with hydrogen input assembly, the natural gas input assembly includes the right cover (22) of detachable sealed fixed in the right end of cylinder (21), and the right cover (22) is sealed and welded with natural gas input pipe fitting (23), and the outer end of natural gas input pipe fitting (23) is connected with the natural gas input pipeline (3) fixed on base (1), and the inner end of natural gas input pipe fitting (23) is sealed and fixed with first blind plate (24), and first blind plate (24) is equipped with a plurality of first pneumatic muffler (241) that communicates natural gas input pipe fitting (23) and the inner chamber of cylinder (21), the hydrogen input assembly includes hydrogen input pipe fitting (25) sealed and welded on cylinder (21), and the outer end of hydrogen input pipe fitting (25) is connected with the hydrogen input pipeline (4) fixed on base (1), and the inner end of hydrogen input pipe fitting (25) is sealed and fixed with second blind plate (26), and second blind plate (26) is equipped with a plurality of second pneumatic muffler (261) that communicates hydrogen input pipe fitting (25) and the inner chamber of cylinder (21), the mixed gas output assembly includes the left cover (27) of detachable sealed fixed in the left end of cylinder (21), and the left cover (27) is sealed and welded with mixed gas output pipe fitting (28), and the inner end of mixed gas output pipe fitting (28) communicates with the inner chamber of cylinder (21), and the outer end of mixed gas output pipe fitting (28) is connected with the mixed gas output pipeline (5) fixed on base (1).

2. The prying natural gas blended hydrogen system of claim 1, wherein, The natural gas input pipeline (3) is equipped with natural gas filter (31), natural gas pressure regulating valve (32) and natural gas meter (33), the hydrogen input pipeline (4) is equipped with hydrogen filter (41), hydrogen pressure regulating valve (42), hydrogen meter (43) and hydrogen flow regulating valve (44), and the mixed gas output pipeline (5) is equipped with mixed gas pressure regulator (51), the cylinder (21) is in the left side position of hydrogen input pipe fitting (25) and is equipped with the sound-absorbing board (29) of interval distribution, and the sound-absorbing board (29) is equipped with evenly distributed sound-absorbing hole (291), and the sound-absorbing hole (291) on adjacent sound-absorbing board (29) is set in staggered mode.

3. The prying natural gas blended hydrogen system of claim 2, wherein, The right end of the cylinder (21) is welded with a first flange (211), the right cover (22) is welded with a second flange (221) matched with the first flange (211), the second flange (221) and the first flange (211) are fixed by bolts and a metal winding gasket is arranged between the two; the natural gas input pipe (23) comprises a coaxially welded short pipe (231) and a tapered pipe (232), the end of the short pipe (231) and the tapered pipe (232) is correspondingly welded with a third flange (233) and a fourth flange (234), the first blind plate (24) is fixed on the fourth flange (234) by bolts, a metal winding gasket is arranged between the first blind plate (24) and the fourth flange (234), and the first pneumatic muffler (241) is installed on the first blind plate (24) by screwing.

4. The prying natural gas blended hydrogen system of claim 2, wherein, The two ends of the hydrogen input pipe (25) are correspondingly welded with a fifth flange (251) and a sixth flange (252), the second blind plate (26) is fixed on the sixth flange (252) by bolts and a metal winding gasket is arranged between the two, the second pneumatic muffler (261) is installed on the second blind plate (26) by screwing; the left end of the cylinder (21) is welded with a seventh flange (212), the left cover (27) is welded with an eighth flange (271), the eighth flange (271) and the seventh flange (212) are fixed by bolts and a metal winding gasket is arranged between the two; the outer end of the mixed gas output pipe (28) is welded with a ninth flange (281).

5. The prying natural gas blended hydrogen system of claim 2, wherein, The hydrogen pressure regulating valve (42) comprises a right valve body (421), a middle valve body (422), a left valve body (423) and a pressure regulating assembly, the right valve body (421) is provided with an air inlet channel (4211) along an axis, a ring-shaped connecting part (4212) is arranged at the middle part of the outer side of the right valve body (421), a valve clack (424) and a guide sleeve (425) are sealingly fixed at the left end of the right valve body (421), the valve clack (424) is provided with air vent holes (4241) distributed along the circumference, the guide sleeve (425) and the valve clack (424) form a pressure regulating air channel (426), the middle valve body (422) is in a cylindrical shape, the right end of the middle valve body (422) is coaxially and sealingly fixedly connected with the connecting part (4212) of the right valve body (421), the left valve body (423) is provided with an air outlet channel (4231) along an axis, the right end of the left valve body (423) is coaxially and sealingly fixedly connected with the left end of the middle valve body (422), the pressure regulating assembly comprises a piston (427) and a valve cylinder (428), the piston (427) is between the guide sleeve (425) and the left valve body (423) and is in sliding sealing cooperation with the middle valve body (422), the valve cylinder (428) is sealingly fixed at the middle part of the piston (427), the right half of the valve cylinder (428) is in the guide sleeve (425) and is in sliding sealing cooperation with the guide sleeve (425), the left half of the valve cylinder (428) is in the left valve body (423) and is in sliding sealing cooperation with the left valve body (423), the space between the piston (427) and the right valve body (421) is an air charging cavity (429), the space between the piston (427) and the left valve body (423) is a feedback cavity (4210), the feedback cavity (4210) is communicated with the air outlet channel (4231) through a feedback channel (4232) arranged in the left valve body (423).

6. The prying natural gas blended hydrogen system of claim 5, wherein, The connecting part (4212) of the right valve body (421) is provided with a vertical air charging channel (4213) communicated with the air inlet channel (4211) and a transverse air charging channel (4214) communicated with the air charging cavity (429), the communication position of the transverse air charging channel (4214) and the vertical air charging channel (4213) is provided with an air charging valve (4215) for controlling the opening and closing of the two channels, the middle valve body (422) is provided with an air exhaust channel (4221) communicated with the air charging cavity (429) and the atmosphere and an air exhaust valve (4222) for controlling the opening and closing of the air exhaust channel (4221).

7. The prying natural gas blended hydrogen system of claim 6, wherein, The connecting part (4212) of the right valve body (421) is provided with a first stepped hole coaxial with the vertical air charging channel (4213), the air charging valve (4215) is installed in the first stepped hole through screwing, the lower end of the air charging valve (4215) is provided with a first sealing gasket extruded around the upper port of the vertical air charging channel (4213), the middle valve body (422) is provided with a second stepped hole coaxial with the air exhaust channel (4221), the air exhaust valve (4222) is installed in the second stepped hole through screwing, the lower end of the air exhaust valve (4222) is provided with a second sealing gasket extruded around the upper port of the air exhaust channel (4221), the first sealing gasket and the second sealing gasket are made of rubber.

8. The prying natural gas blended hydrogen system of claim 7, wherein, The right end of the left valve body (423) is fixedly connected with the left end of the middle valve body (422) through screws, the left valve body (423) is provided with a positioning ring table (4233) extending into the middle valve body (422), a first sealing ring is mounted on the outer peripheral wall of the positioning ring table (4233) and extruded on the middle valve body (422), a second sealing ring and a sealing ring are arranged between the right end face of the positioning ring table (4233) and the middle valve body (422), the first sealing ring and the second sealing ring are made of rubber, and the sealing ring is made of polytetrafluoroethylene.

9. The prying natural gas blended hydrogen system of claim 7, wherein, The connecting portion (4212) of the right valve body (421) is fixedly connected with the right end of the middle valve body (422) through screws, and the right end of the middle valve body (422) is mounted with a third sealing ring extruded on the connecting portion (4212) and made of rubber; the guide sleeve (425) is fixed on the left end of the right valve body (421) through screws, the valve flap (424) is clamped between the right valve body (421) and the guide sleeve (425), the first sealing member is clamped between the right valve body (421), the valve flap (424) and the guide sleeve (425), and the left side of the valve flap (424) is fixed with the second sealing member matched with the valve cylinder (428) through screws and a pressure plate.

10. The prying natural gas blended hydrogen system of claim 7, wherein, The peripheral wall of the valve cylinder (428) is provided with a limiting ring (4281), the limiting ring (4281) is clamped in the groove arranged on the right side of the piston (427), the right side of the limiting ring (4281) is provided with a pressing ring (4271) fixed on the piston (427) through screws; the right end of the right valve body (421) is provided with an air inlet end flange (4216), the air inlet end flange (4216) is mounted with an air inlet end pressure gauge (4217), the air inlet of the air inlet end pressure gauge (4217) communicates with the air inlet channel (4211) through an air inlet pressure taking channel (4218), the right end of the left valve body (423) is provided with an air outlet end flange (4234), the air outlet end flange (4234) is mounted with an air outlet end pressure gauge (4235), and the air inlet of the air outlet end pressure gauge (4235) communicates with the air outlet channel (4231) through an air outlet pressure taking channel (4236).

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