Natural gas and hydrogen mixing device with protection mechanism

Abstract

The utility model provides a natural gas and hydrogen mixing device with a protection mechanism, which comprises a stirring and mixing barrel, a natural gas conveying pipe fixedly connected to one side of the surface of the stirring and mixing barrel and a hydrogen conveying pipe fixedly connected to one side of the surface of the stirring and mixing barrel, and the lower end of the stirring and mixing barrel is fixedly connected with a gas outlet. The natural gas conveying pipe and the hydrogen conveying pipe are not overlapped, and a mixing assembly is arranged in the stirring and mixing tank body; the mixing assembly comprises a fixed cover mounted at the upper end of the stirring and mixing tank body and a rotating shaft rotationally connected to the fixed cover through a bearing, and a group of driving blades and a plurality of groups of mixing blades are annularly arrayed on the outer wall of the rotating shaft; the air outlet is connected with an air outlet pipe in a welded mode and sleeved with a protection mechanism, and the protection mechanism comprises an upper cover plate, a lower cover plate, an inflation sealing assembly and a supporting assembly.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas mixing field, concretely is a natural gas and hydrogen mixed device with protection mechanism. BACKGROUND

[0002] Hydrogen is a kind of element formed by hydrogen element, hydrogen is a kind of colorless and odorless gas that is extremely flammable and difficult to dissolve in water at normal temperature and pressure.Development hydrogen energy to reduce greenhouse gas emissions has become the global consensus, and countries have invested in hydrogen energy research and commercialization promotion.In addition to the well-known hydrogen fuel vehicles, natural gas hydrogen blending is also an important direction of hydrogen energy utilization.Natural gas hydrogen blending technology can use existing natural gas pipeline transportation, and compared with other ways, it is low in cost and high in efficiency, and is an effective way to realize large-scale and long-distance hydrogen transport at present.

[0003] The dynamic mixer for hydrogen natural gas blending is a kind of professional designed equipment, which can ensure that hydrogen and natural gas can be fully and uniformly mixed in the flow process through mechanical movement, and such mixer usually contains movable parts, such as rotating blades or spiral structure, which can create complex flow field in the gas flow path, forcing hydrogen and natural gas molecules to undergo efficient diffusion and mixing process.But in the process of high-speed rotation, vibration may occur due to blade defects or improper dynamic balance adjustment, and long-term vibration may cause cracking of the welded part of the connecting pipe and then cause gas leakage accident.Although the detection probe can be used to detect hydrogen concentration to achieve early warning effect, but after discovering hydrogen leakage, secondary sealing cannot be carried out in time, and there is certain danger when waiting for maintenance personnel to repair. UTILITY MODEL CONTENTS

[0004] In order to overcome the problem of lack of protection means for gas leakage in the prior art, the utility model provides a natural gas and hydrogen mixing device with protection mechanism, which effectively reduces the risk of gas leakage by setting the protection mechanism.

[0005] The utility model adopts the following technical solutions.

[0006] A natural gas and hydrogen mixing device with protection mechanism, comprising a stirring and mixing cylinder body, a natural gas gas pipe fixedly connected to one side of the surface of the stirring and mixing cylinder body and a hydrogen gas pipe fixedly connected to one side of the surface of the stirring and mixing cylinder body, a gas outlet fixedly connected to the lower end of the stirring and mixing cylinder body, the natural gas gas pipe and the hydrogen gas pipe are not coincidently arranged, and a mixing assembly is arranged in the stirring and mixing cylinder body.

[0007] The mixing assembly comprises a fixed cover installed on the upper end of the stirring mixing cylinder body and a rotating shaft rotatably connected to the fixed cover through a bearing, and a group of driving blades and a plurality of groups of mixing blades are arranged in an annular array on the outer wall of the rotating shaft;

[0008] The air outlet is connected with an air outlet pipe through welding, and the air outlet is sleeved with a protection mechanism, which comprises an upper cover plate, a lower cover plate, an inflation sealing assembly and a supporting assembly.

[0009] Preferably, the inflation sealing assembly comprises an inflation ring arranged at both ends of the upper cover plate and the lower cover plate, a gas cylinder in communication with the inflation ring, and a gas sensor, the inner wall of the inflation ring is made of elastic material, and the gas cylinder stores high-pressure gas to make the inner wall of the inflation ring expand.

[0010] Preferably, the supporting assembly comprises a fixed plate fixed to the lower cover plate, an extension plate slidably arranged in the fixed plate, and a lead screw rotatably arranged in the fixed plate, the lead screw is threadedly connected with the extension plate.

[0011] The fixed plate is rotatably provided with a manual rotating wheel, and the output end of the manual rotating wheel is drivingly connected with the lead screw through two bevel gears arranged in meshing.

[0012] Preferably, the surface of the mixing blade has a wave-shaped concave-convex shape and is uniformly distributed with a plurality of straightening holes.

[0013] Preferably, the rotating shaft is further provided with a dynamic balance assembly, the dynamic balance assembly comprises an outer shell fixed to the rotating shaft, an adjusting motor fixed to the outer shell, a gear connected to the output end of the adjusting motor, a gear ring rotatably arranged in the outer shell, a counterweight block detachably arranged on the gear ring, and the gear is in meshing with the gear ring.

[0014] The utility model discloses the beneficial effect is:

[0015] The utility model provides a kind of natural gas and hydrogen gas mixing device with protection mechanism, including stirring mixing cylinder body, and fixedly connected in the natural gas gas pipe of stirring mixing cylinder body surface one side and fixedly connected in the hydrogen gas gas pipe of stirring mixing cylinder body surface one side, the lower end of stirring mixing cylinder body is fixedly connected with gas outlet, natural gas gas pipe is not coincident with the hydrogen gas gas pipe setting, the inside of stirring mixing cylinder body is provided with mixing component;Mixing component includes the fixed cover of being installed in the upper end of stirring mixing cylinder body and the rotating shaft of being rotatably connected on the fixed cover by bearing, rotating shaft outer wall annular array has a group of driving blades and several groups of mixing blades;Gas outlet is connected with gas outlet pipe by welding, gas outlet is equipped with protection mechanism, and the protection mechanism includes upper cover plate, lower cover plate, inflation sealing component and support component.The high-pressure gas output from natural gas pipeline and hydrogen pipeline makes driving gas rotate, drives multiple groups of mixing blades to mix hydrogen and natural gas;And the gas outlet of stirring mixing cylinder body is equipped with protection mechanism, the inflation sealing component in it can be secondary sealed to leakage place when gas leakage occurs, and leakage speed is reduced;And support component can reduce the influence of vibration on connecting place weld during stirring and mixing, simultaneously prevent the influence of gas outlet pipe due to geological subsidence. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in embodiment or prior art description, and obviously, other drawings can be obtained by these drawings without creative labor for ordinary skilled in the art.

[0017] Figure 1 It is the structure schematic view of an embodiment of the utility model;

[0018] Figure 2 It is the sectional view of an embodiment of the utility model;

[0019] Figure 3 It is the explosion view of dynamic balance subassembly in an embodiment of the utility model.

[0020] Explanation of reference numerals: 1, stirring mixing cylinder body;11, natural gas gas pipe;12, hydrogen gas gas pipe;13, gas outlet;131, gas outlet pipe;14, fixed cover;21, rotating shaft;22, driving blade;23, mixing blade;231, rectifier hole;31, upper cover plate;32, lower cover plate;33, inflation ring;34, gas cylinder;35, gas sensor;41, fixed plate;42, extension plate;43, screw;44, bevel gear;45, hand rotating wheel;51, shell;52, regulating motor;53, gear;54, gear ring;541, counterweight. DETAILED DESCRIPTION

[0021] The drawings are only used for illustrative purposes and cannot be understood as limiting the patent; in order to better illustrate the embodiments, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the actual size of the product.

[0022] It is understandable for those skilled in the art that some known structures and their descriptions in the drawings may be omitted. The technical solutions of the utility model will be further described below in combination with the drawings and embodiments.

[0023] A natural gas and hydrogen gas mixing device with a protection mechanism, comprising a stirring and mixing cylinder body 1, a natural gas gas conveying pipe 11 fixedly connected to one side of the surface of the stirring and mixing cylinder body 1, and a hydrogen gas gas conveying pipe 12 fixedly connected to one side of the surface of the stirring and mixing cylinder body 1, and a gas outlet 13 fixedly connected to the lower end of the stirring and mixing cylinder body 1, the natural gas gas conveying pipe 11 and the hydrogen gas gas conveying pipe 12 are not coincidently arranged, and a mixing assembly is arranged in the stirring and mixing cylinder body.

[0024] The mixing assembly comprises a fixed cover 14 installed on the upper end of the stirring and mixing cylinder body and a rotating shaft 21 rotatably connected to the fixed cover 14 through a bearing, the outer wall of the rotating shaft 21 is annularly arranged with a group of driving blades 22 and a plurality of groups of mixing blades 23. When the high-pressure gas in the natural gas gas conveying pipe 11 and the hydrogen gas gas conveying pipe 12 is introduced into the stirring and mixing cylinder body, the gas will drive the driving blades 22 to rotate, thereby driving the mixing blades 23 to mix the natural gas and the hydrogen gas.

[0025] The gas outlet 13 is connected with a gas outlet pipe 131 through welding, the gas outlet 13 is sleeved with a protection mechanism, the protection mechanism comprises an upper cover plate 31, a lower cover plate 32, a gas charging sealing assembly and a supporting assembly. The upper cover plate 31 and the lower cover plate 32 are detachably connected through bolts.

[0026] In some embodiments, the gas charging sealing assembly comprises a gas charging ring 33 arranged at both ends of the upper cover plate 31 and the lower cover plate 32, a gas cylinder 34 in communication with the gas charging ring 33, and a gas sensor 35, the inner wall of the gas charging ring 33 is made of elastic material, and the gas cylinder 34 stores high-pressure gas to make the inner wall of the gas charging ring 33 expand. When the gas sensor 35 detects natural gas or hydrogen gas leakage, the high-pressure nitrogen gas in the gas cylinder 34 will make the inner wall of the gas charging ring 33 expand, and the inner wall of the gas charging ring 33 abuts against the outer wall of the gas outlet 13, thereby forming a sealed space in the upper cover plate 31 and the lower cover plate 32, avoiding continuous gas leakage. Further, rubber sealing strips are arranged on the side where the upper cover plate 31 and the lower cover plate 32 are close to each other, so as to improve the sealing effect.

[0027] In some embodiments, the support assembly comprises a fixed plate 41 fixed on the lower cover plate 32, an extension plate 42 slidably arranged in the fixed plate 41, and a lead screw 43 rotatably arranged in the fixed plate 41 and threadedly connected with the extension plate 42; the fixed plate 41 is rotatably provided with a manual rotating wheel 45, and the output end of the manual rotating wheel 45 is drivingly connected with the lead screw 43 through two meshing bevel gears 44.

[0028] In use, the lead screw 43 is rotated by rotating the manual rotating wheel 45, and then the extension plate 42 is moved by the lead screw 43, so as to adjust the length of the extension support assembly, which can adapt to different use environments through rapid adjustment, and can also adjust the length of the support assembly in long-term use to avoid the influence of geological subsidence on the gas outlet pipe 131.

[0029] In some embodiments, the surface of the mixing blade 23 has a wavy concave-convex shape and is uniformly provided with a plurality of fairing holes 231. The wavy concave-convex shape can make the hardness of the mixing blade 23 higher, and the fairing holes 231 can improve the stirring and mixing effect of the gas, so that the gas is fully mixed

[0030] In some embodiments, the rotating shaft 21 is further provided with a dynamic balance assembly, the dynamic balance assembly comprises an outer shell 51 fixed on the rotating shaft 21, an adjusting motor 52 fixed on the outer shell 51, a gear 53 connected with the output end of the adjusting motor 52, a gear ring 54 rotatably arranged in the outer shell 51, and a counterweight 541 detachably arranged on the gear ring 54, and the gear 53 is engaged with the gear ring 54. The rotating shaft 21 is further provided with a vibration sensor, the counterweight 541 on the gear ring 54 is arranged according to the vibration sensor, the counterweight 541 is asymmetrically arranged, the adjusting motor 52 drives the gear ring 54 to rotate by a certain angle to realize the adjustment of dynamic balance. Further, the dynamic balance assembly is two or more. The adjusting motor 52 is powered on and started when the natural gas pipeline 11 and the hydrogen gas pipeline 12 are closed.

[0031] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model claims.

Claims

1. A natural gas and hydrogen mixing device with a protective mechanism, comprising a mixing cylinder, a natural gas pipeline fixedly connected to one side of the surface of the mixing cylinder, and a hydrogen pipeline fixedly connected to one side of the surface of the mixing cylinder, wherein a gas outlet is fixedly connected to the lower end of the mixing cylinder, characterized in that, The natural gas pipeline and the hydrogen pipeline are not arranged to overlap, and a mixing component is provided inside the stirring and mixing cylinder. The mixing assembly includes a fixed cover installed on the upper end of the mixing cylinder and a rotating shaft rotatably connected to the fixed cover via a bearing. The outer wall of the rotating shaft has a set of driving blades and several sets of mixing blades arranged in a ring. The air outlet is connected to an air outlet pipe by welding, and the air outlet is fitted with a protective mechanism, which includes an upper cover plate, a lower cover plate, an inflation sealing component, and a support component.

2. The natural gas and hydrogen mixing device with a protective mechanism according to claim 1, characterized in that, The inflatable sealing assembly includes an inflatable ring disposed at both ends of the upper cover plate and the lower cover plate, a gas cylinder communicating with the inflatable ring, and a gas sensor. The inner wall of the inflatable ring is made of an elastic material, and the gas cylinder stores high-pressure gas, which can cause the inner wall of the inflatable ring to expand.

3. A natural gas and hydrogen mixing device with a protective mechanism according to claim 1, characterized in that, The support assembly includes a fixed plate fixed to the lower cover plate, an extension plate slidably disposed inside the fixed plate, and a lead screw rotatably disposed inside the fixed plate, the lead screw being threadedly connected to the extension plate; The fixed plate is equipped with a manual rotating wheel, and the output end of the manual rotating wheel is connected to the lead screw through two meshing bevel gears.

4. A natural gas and hydrogen mixing device with a protective mechanism according to claim 1, characterized in that, The surface of the hybrid blade has a wavy texture and multiple rectifier holes evenly distributed on it.

5. A natural gas and hydrogen mixing device with a protective mechanism according to claim 1, characterized in that, A dynamic balancing assembly is also provided on the rotating shaft. The dynamic balancing assembly includes a housing fixed on the rotating shaft, an adjusting motor fixed on the housing, a gear connected to the output end of the adjusting motor, a gear ring rotatably provided inside the housing, a counterweight detachably provided on the gear ring, and the gear meshing with the gear ring.

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