CN111140771B - Active safety protection device and method for hydrogen pipeline - Google Patents
Active safety protection device and method for hydrogen pipeline Download PDFInfo
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- CN111140771B CN111140771B CN201911404806.6A CN201911404806A CN111140771B CN 111140771 B CN111140771 B CN 111140771B CN 201911404806 A CN201911404806 A CN 201911404806A CN 111140771 B CN111140771 B CN 111140771B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/168—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe
- F16L55/17—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by means of rings, bands or sleeves pressed against the outside surface of the pipe or hose
- F16L55/172—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by means of rings, bands or sleeves pressed against the outside surface of the pipe or hose the ring, band or sleeve being tightened by a tangentially arranged threaded pin and a nut
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C11/00—Use of gas-solvents or gas-sorbents in vessels
- F17C11/005—Use of gas-solvents or gas-sorbents in vessels for hydrogen
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/45—Hydrogen technologies in production processes
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The application relates to an active safety protection device and method for a hydrogen pipeline. Above-mentioned hydrogen pipeline initiative safety device is through making an environment that can retrain the hydrogen of leaking in the department that easily leaks, moreover, when hydrogen leakage rate is less, when leaking the quantity less, utilizes hydrogen absorption spare adsorbs the hydrogen that leaks or reacts to reduce or eliminate the possibility that hydrogen exploded, and when hydrogen leakage rate is very fast, leak the quantity when great, need not external energy or power source, only relies on the hydrogen pressure trigger that the loss comes out sealing mechanism releases sealing medium, and then realizes automatically sealing the inside hydrogen of casing and external world and keeps apart, prevents the hydrogen loss.
Description
Technical Field
The application relates to the field of hydrogen delivery, in particular to an active safety protection device and method for a hydrogen pipeline.
Background
Energy exhaustion and environmental pollution caused by fossil energy consumption are becoming serious, and large-scale development and utilization of renewable energy are imperative. Although renewable energy resources are abundant and widely distributed, the renewable energy resources fluctuate violently and are periodically influenced by natural environments. Hydrogen is an effective energy storage mode, electric energy is converted into chemical energy to be stored in the hydrogen in the peak period of renewable energy power generation, and the energy carried by the hydrogen is converted into the electric energy again through a fuel cell for use in the peak period of power utilization. Therefore, the technologies of hydrogen preparation, storage, transportation and the like are regarded by relevant researchers.
However, hydrogen is a very flammable and explosive gas, and when the volume fraction of hydrogen in air exceeds 4% -75%, explosion can be caused when the hydrogen meets a fire source. Therefore, hydrogen leakage and active protection after leakage during transportation and storage of hydrogen are very important.
Disclosure of Invention
Based on this, the present application provides an active safety protection device and method for a hydrogen pipeline, so as to prevent a large amount of leaked hydrogen from escaping, thereby causing a safety accident.
An active safety device for a hydrogen pipeline, comprising:
the hydrogen transportation pipeline is arranged in the first cavity, a sealing groove is formed between the shell and the hydrogen transportation pipeline, and the shell is detachably connected with the hydrogen transportation pipeline;
the hydrogen adsorption piece is arranged on the inner side wall of the shell and used for adsorbing hydrogen in the cavity; and
the sealing mechanism is internally provided with a sealing medium, one end of the sealing mechanism is communicated with the first cavity through a communicating pipeline, the other end of the sealing mechanism is connected with the sealing groove through a sealing medium conveying channel, when the hydrogen leakage speed is higher than the adsorption speed threshold of the hydrogen adsorption piece, so that when the pressure in the first cavity reaches a first threshold, gas enters one end of the sealing mechanism through the communicating pipeline, and when the gas pressure at one end of the sealing mechanism reaches a second threshold, the sealing mechanism starts to push the sealing medium to enter the sealing medium conveying channel, so that the sealing medium is filled in the sealing groove.
In one embodiment, the sealing mechanism comprises:
the sealing medium storage bin is internally provided with sealing medium, and one end of the sealing medium storage bin is connected with the sealing groove through the sealing medium conveying channel;
one end of the cylinder body is communicated with the first cavity through the communication pipeline, and the other end of the cylinder body is communicated with the other end of the sealing medium storage bin; and
and one end of the sealing medium pushing piece is arranged in the sealing medium storage bin, the other end of the sealing medium pushing piece is arranged in the cylinder body, and when the pressure of gas entering one end of the cylinder body reaches a second threshold value, the sealing medium pushing piece moves towards the direction of the sealing medium storage bin so as to push the sealing medium to enter the sealing medium conveying channel and further fill the sealing groove.
In one embodiment, the sealing medium pushing member is arranged in the sealing medium storage bin, and the cross-sectional area of the sealing medium pushing member arranged in the cylinder body is smaller than that of the sealing medium pushing member arranged in the cylinder body.
In one embodiment, the sealing mechanism further comprises:
and the air leakage hole is arranged between the other end of the cylinder body and the other end of the sealing medium storage bin.
In one embodiment, a second cavity is formed in the side wall of the shell, the second cavity is connected with the first cavity through the communication pipeline, and the sealing mechanism is arranged in the second cavity.
In one embodiment, the method further comprises the following steps:
the first flexible sealing element is arranged between the shell and the hydrogen transportation pipeline so as to form an insulated sealing environment in the first cavity, the sealing groove is arranged on the outer surface of the first flexible sealing element which is in direct contact with the hydrogen transportation pipeline, and the hydrogen adsorption element is close to the first flexible sealing element arranged on the inner side wall of the shell.
In one embodiment, the method further comprises the following steps:
and the hydrogen leakage alarm circuit is arranged in the first cavity and used for detecting the hydrogen content, the gas pressure value or the gas pressure variation in the first cavity and carrying out early warning.
In one embodiment, the material of the hydrogen adsorbing member is any one or more of ferrotitanium, ferrotitanium-carbon alloy, calcium-manganese-nickel-aluminum alloy, rare earth lanthanum-nickel, complex, carbonaceous material or other hydrogen adsorbing material.
In one embodiment, the housing has an opening extending through the housing in the direction of extension of the hydrogen transport conduit, the opening being adapted to locate the hydrogen transport conduit in the cavity.
In one embodiment, the method further comprises the following steps:
the buckle is fixedly arranged on the outer side wall of the shell; and
the snap ring, one end is fixed set up in the lateral wall of casing, and the snap ring with the buckle interval set up in the both ends of opening, work as the other end block of snap ring in during the buckle, will through pressing the snap ring the opening is closed.
An active safety protection method for a hydrogen pipeline is implemented by using the active safety protection device for a hydrogen pipeline in any one of the above embodiments, and the active safety protection method for a hydrogen pipeline includes:
s10, wrapping the joint of the hydrogen transportation pipeline by using the first cavity in the shell;
s20, adsorbing hydrogen in the cavity by using a hydrogen adsorption piece;
s30, when the hydrogen leakage speed is larger than the hydrogen adsorption speed threshold value, so that the pressure in the first cavity reaches a first threshold value, gas enters one end of the sealing mechanism through a communication pipeline;
and S40, when the pressure of the gas entering one end of the sealing mechanism reaches a second threshold value, the sealing mechanism starts to push the sealing medium to enter the sealing medium conveying channel, so that the sealing medium is filled in the sealing groove.
The active safety protection device for the hydrogen pipeline comprises a shell, a hydrogen adsorption piece and a sealing mechanism. The shell is internally provided with a first cavity. The hydrogen transportation pipeline is arranged in the first cavity. The first cavity provides a closed space for the hydrogen transportation pipeline. The shell with hydrogen transportation pipeline contact surface is equipped with the seal groove. The shell is detachably connected with the hydrogen transportation pipeline, so that the hydrogen transportation pipeline is convenient to overhaul. The hydrogen adsorption piece is arranged on the inner side wall of the shell and used for adsorbing hydrogen in the cavity, so that the possibility of hydrogen explosion is reduced or eliminated. The sealing mechanism is internally provided with a sealing medium. One end of the sealing mechanism is communicated with the first cavity through a communicating pipeline, and the other end of the sealing mechanism is connected with the sealing groove through a sealing medium conveying channel. When the hydrogen leakage speed is higher than the adsorption speed threshold of the hydrogen adsorption part, so that the pressure in the first cavity reaches a first threshold, gas enters one end of the sealing mechanism through the communicating pipeline, and when the gas pressure entering one end of the sealing mechanism reaches a second threshold, the sealing mechanism starts to push the sealing medium to enter the sealing medium conveying channel so as to be filled in the sealing groove. Above-mentioned hydrogen pipeline initiative safety device is through making an environment that can retrain the hydrogen of leaking in the department that easily leaks, moreover, when hydrogen leakage rate is less, when leaking the quantity less, utilizes hydrogen absorption spare adsorbs the hydrogen that leaks or reacts to reduce or eliminate the possibility that hydrogen exploded, and when hydrogen leakage rate is very fast, leak the quantity when great, need not external energy or power source, only relies on the hydrogen pressure trigger that the loss comes out sealing mechanism releases sealing medium, and then realizes automatically sealing the inside hydrogen of casing and external world and keeps apart, prevents the hydrogen loss.
Drawings
FIG. 1 is a cross-sectional elevation view of an active safety device for a hydrogen circuit according to one embodiment of the present application;
FIG. 2 is a cross-sectional top view of an active safety device of a hydrogen circuit according to one embodiment of the present disclosure;
FIG. 3 is a schematic view of the housing of the active safety device of the hydrogen pipeline according to one embodiment of the present disclosure;
FIG. 4 is a schematic view of the housing of the active safety device of the hydrogen pipeline according to one embodiment of the present disclosure;
fig. 5 is a flowchart of an active safety protection method for a hydrogen pipeline according to an embodiment of the present disclosure.
Description of the main element reference numerals
Seal groove 103
Sealing medium feed channel 105
Fastener 110
First clamping body 130
First flexible seal 200
Sealing medium 301
Sealing medium storage bin 310
Sealing medium pusher 330
Hydrogen leakage alarm circuit 400
Pipe joint nut 30
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the embodiments disclosed below.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 and 2 together, the present application provides an active safety device 10 for a hydrogen pipeline. The hydrogen pipeline active safety protection device 10 includes a housing 100, a hydrogen adsorbing member 500, and a sealing mechanism 300.
The housing 100 has a first cavity 101 therein. A hydrogen transport pipe 20 is disposed in the first chamber 101. A sealing groove 103 is provided between the housing 100 and the hydrogen transport pipe 20. And the housing 100 is detachably coupled to the hydrogen transport pipe 20. The hydrogen adsorbing member 500 is disposed on the inner sidewall of the housing 100, and is configured to adsorb hydrogen in the cavity 101. The sealing mechanism 300 has a sealing medium 301 therein. One end of the sealing mechanism 300 is communicated with the first cavity 101 through a communication pipeline 104, and the other end is connected with the sealing groove 103 through a sealing medium conveying channel 105. When the hydrogen leakage rate is greater than the adsorption rate threshold of the hydrogen adsorbing member 500, so that the pressure in the first cavity 101 reaches a first threshold, gas enters one end of the sealing mechanism 300 through the communication pipeline 104. When the pressure of the gas entering one end of the sealing mechanism 300 reaches a second threshold value, the sealing mechanism 300 starts to push the sealing medium 301 into the sealing medium conveying channel 105, so as to fill the sealing groove 103.
Specifically, the shape and size of the housing 100 are not particularly limited as long as the portion of the hydrogen transport pipe 20 that is susceptible to leakage is ensured inside the housing 100. The housing 100 has a certain pressure-bearing capacity and a certain sealing property. The shape and size of the housing 100 may be set according to the pipe diameter of the hydrogen transport pipe 20. The housing 100 ensures that the parts of the hydrogen transport pipe 20 that are susceptible to leakage are inside the housing 100. That is, for example, when the part of the hydrogen transportation pipe 20 that is susceptible to leakage is a transportation pipe joint, it is necessary to ensure that the transportation pipe joint can be entirely located in the cavity 101 of the housing 100. The transport pipe joints of the respective sections of hydrogen transport pipe 20 are connected by pipe joint nuts 30. Of course, the transportation pipe joints of the hydrogen transportation pipes 20 may be connected by other connection methods. The upper and lower bottom surfaces of the housing 100 have through-holes to facilitate the passage of the hydrogen transport pipe 20.
The housing 100 and the hydrogen transportation pipeline 20 may be detachably connected by providing an opening in the housing 100, and when the hydrogen transportation pipeline is properly installed, the housing 100 is sleeved on a part of the hydrogen transportation pipeline, where leakage is likely to occur, through the opening in the housing 100. The housing 100 may be detachably connected to the hydrogen transportation pipe 20 by providing the housing 100 as two half shells that are butted together. The two half shells can be detachably connected with each other through bolts, clamping or other detachable modes. The detachable connection of the housing 100 and the hydrogen transportation pipeline 20 may also be achieved by configuring the housing 100 as an elastically contractible structure, and before the hydrogen transportation pipeline is installed, the housing 100 is directly sleeved on a part of the hydrogen transportation pipeline, where leakage is likely to occur, and then the hydrogen transportation pipeline is installed.
The sealing groove 103 may be provided at a portion where the housing 100 contacts the hydrogen transport pipe 20, and at a portion where the housing 100 is detachable. For example, the sealing groove 103 is provided at a portion where the upper bottom surface and the lower bottom surface of the housing 100 are closely attached to the hydrogen transport pipe 20. When the housing 100 is detachably connected to the hydrogen transportation pipe 20 in such a manner that an opening is provided in the housing 100, the sealing groove 103 may be provided in a wall of the housing surrounding the opening. When the sealing groove 103 is filled with the sealing medium 301, a sealed space sealed from the outside may be formed between the housing 100 and the hydrogen transport pipe 20.
The hydrogen adsorbing member 500 may be disposed on a sidewall of the entire inner space of the case 100. The hydrogen adsorbing member 500 may be provided only at a designated position of the housing 100. The hydrogen absorbing member 500 is made of any one or more of ferrotitanium, ferrotitanium-carbon alloy, calcium-manganese-nickel-aluminum alloy, rare earth lanthanum-nickel, complex, carbonaceous material or other hydrogen absorbing material. When hydrogen leakage occurs at the joint of the hydrogen transportation pipeline 20, the hydrogen leaked in the cavity 101 can be adsorbed by the hydrogen adsorbing member 500, so that the hydrogen is prevented from being dissipated to the external environment.
The structure and position of the sealing mechanism 300 are not particularly limited. In an alternative embodiment, the sealing mechanism 300 may be disposed inside the housing 100. When the seal mechanism 300 is disposed inside the housing 100, the communication line 104 and the seal medium conveyance passage 105 are both disposed inside the housing 100. The material of the sealing medium 301 is not particularly limited as long as it has appropriate viscosity characteristics and setting time, can enter the sealing medium delivery channel 105 relatively quickly under pushing, and has a viscosity that is significantly increased or set quickly after a certain time after being released from the inside of the sealing mechanism 300. When the sealing medium 301 fills the sealing groove 103, the sealing medium does not flow out of the sealing groove 103 too much due to viscosity increase or condensation. The first threshold value and the second threshold value may be set according to the structure of the sealing mechanism 300.
In this embodiment, the active safety protection device 10 for hydrogen pipeline can restrict the environment where hydrogen leakage occurs easily, and when the hydrogen leakage rate is low and the leakage amount is low, the hydrogen adsorption member 500 is used to adsorb or react the leaked hydrogen, so as to reduce or eliminate the possibility of hydrogen explosion, and when the hydrogen leakage rate is high and the leakage amount is high, no external energy or power source is needed, the sealing mechanism 300 is triggered by the pressure of the leaked hydrogen to release the sealing medium 301, so as to automatically seal and isolate the hydrogen inside the casing 100 from the outside, thereby preventing hydrogen from escaping.
In one alternative embodiment, the sealing mechanism 300 includes a sealing medium storage bin 310, a cylinder 320, and a sealing medium pusher 330.
The sealing medium storage bin 310 has a sealing medium 301 therein. One end of the sealing medium storage bin 310 is connected to the sealing groove 103 through the sealing medium conveying passage 105. One end of the cylinder 320 is communicated with the first chamber 101 through the communication pipe 104. The other end of the cylinder 320 is communicated with the other end of the sealing medium storage bin 310. One end of the sealing medium pushing member 330 is disposed in the sealing medium storage bin 310, and the other end is disposed in the cylinder 320. When the pressure of the gas entering the end of the cylinder 320 reaches a second threshold value, the sealing medium pushing member 330 moves toward the sealing medium storage bin 310 to push the sealing medium 301 to enter the sealing medium conveying channel 105, so as to fill the sealing groove 103.
Specifically, the sealing medium storage bin 310 and the cylinder 320 are both devices with openings at both ends. The right opening of the sealing medium storage bin 310 communicates with the left opening of the cylinder 320. The sealing medium pusher 330 may be a double-ended piston. The left end of the double-headed piston is disposed at the right end of the sealing medium storage bin 310. The right end of the double-headed piston is disposed at the left end of the cylinder block 320. The left double headed piston head is the same width as the sealing medium reservoir 310. The right double head piston head is the same width as the cylinder block 320. The sealing medium 301 may fill the space between the left end of the double-headed piston and the left end of the sealing medium storage bin 310. Optionally, the cross-sectional area of the sealing medium pusher 330 disposed in the sealing medium storage bin 310 is smaller than the cross-sectional area of the sealing medium pusher 330 disposed in the cylinder 320. The distance the sealing medium pusher 330 can move can press the sealing medium 301 into and fill the sealing groove 103.
In an alternative embodiment, the sealing mechanism 300 further includes a relief hole 340. The air release hole 340 is disposed between the other end of the cylinder body 320 and the other end of the sealing medium storage bin 310. That is, the air release hole 340 is provided between the right opening of the sealing medium storage bin 310 and the left opening of the cylinder 320. The air release hole 340 ensures the communication between the air in the cylinder 320 and the outside on the left side of the right piston of the double-headed piston. The air release hole 340 may also be disposed on a side of the sealing groove 103 away from the sealing medium 301, so as to ensure that the sealing medium 301 enters the sealing groove 103 through the sealing medium conveying channel 105 with a low back pressure and can fill the sealing groove 103.
In one embodiment, the housing 100 has a second cavity 106 in a sidewall thereof. The second cavity 106 is connected to the first cavity 101 through the communication pipe 104. The sealing mechanism 300 is disposed in the second cavity 106. Specifically, the sealing medium storage bin 310, the cylinder 320 and the sealing medium pushing member 330 are all disposed in the second cavity 106. The sealing mechanism 300 disposed in the second cavity 106 can reduce the volume of the active safety device 10 for hydrogen pipeline, and is convenient to carry.
In one embodiment, the hydrogen circuit active safety device 10 further includes a first flexible seal 200. The first flexible sealing member 200 is disposed between the housing 100 and the hydrogen transportation pipe 20 to form an insulating and sealed environment in the first cavity 101. The sealing groove 103 is disposed on an outer surface of the first flexible sealing member 200 directly contacting the hydrogen transport pipe 20, and the hydrogen adsorbing member 500 is disposed near the first flexible sealing member 200 on an inner sidewall of the housing 100.
Specifically, the first flexible sealing element 200 may be any one of rubber, resin, plastic material, silicone material, or other flexible sealing material. The first flexible sealing members 200 are disposed at portions where the upper and lower bottom surfaces of the housing 100 are closely attached to the hydrogen transport pipe 20. Of course, the first flexible seal member 200 may be provided at a detachable portion of the housing 100. The first flexible sealing member 200 may be fixedly disposed in the cavity 101 by bonding. The first flexible sealing element 200 may also be provided with a clamping member at a corresponding position of the housing 100, and the clamping member fixes the first flexible sealing element 200 to the cavity 101. When the sealing mechanism 300 is not in operation, the first flexible sealing element 200 is disposed to provide a certain sealing property to the hydrogen pipeline active safety device 10, so as to prevent hydrogen from escaping in the case of less hydrogen leakage.
In one embodiment, the hydrogen circuit active safety device 10 further includes a hydrogen leak alarm circuit 400. The hydrogen leakage alarm circuit 400 is disposed in the first cavity 101, and is configured to detect a hydrogen content, a gas pressure value or a gas pressure variation in the first cavity 101, and perform early warning.
When hydrogen leakage occurs at the joint of the hydrogen transportation pipeline 20, the hydrogen pipeline active safety protection device 10 has a small internal space, the hydrogen concentration can be quickly increased, the internal gas pressure can also be quickly increased, the hydrogen leakage alarm circuit 400 can quickly respond, and then the worker is reminded to timely close the hydrogen transportation valve and overhaul the pipeline with leakage. Moreover, the hydrogen leaked in the first cavity 101 can be treated by ignition, adsorption, reaction, collection and other means, so as to prevent the hydrogen from escaping into the external environment. The hydrogen leakage alarm circuit 400 can be used for maintenance in a color, sound, light or electric signal indicating manner.
In an alternative embodiment, the hydrogen leak alarm circuit 400 includes a detector 410 and an alarm 420.
The detector 410 is disposed in the first chamber 101, and configured to detect a hydrogen content, a gas pressure value, or a gas pressure variation in the first chamber 101. The alarm 420 is electrically connected to the detector 410. When the hydrogen content, the gas pressure value, or the gas pressure variation detected by the detector 410 is greater than a preset value, an alarm signal is sent to the alarm 420.
Optionally, the detector 410 is a hydrogen concentration detector, a gas pressure detector or a gas pressure change detector, and the alarm 420 is a warning light or a buzzer. The alarm 420 may be disposed on an inner wall of the housing 100. The alarm 420 may also be disposed on an outer wall of the housing 100.
In this embodiment, the hydrogen leakage alarm circuit 400 is configured to detect the hydrogen content, the gas pressure value, or the gas pressure variation in the cavity 101, and perform early warning. The hydrogen leak alarm circuit 400 can respond quickly to notify the staff to perform maintenance to prevent a large amount of leaked hydrogen from accumulating.
Referring to fig. 3, in one embodiment, the housing 100 has an opening 102 extending through the housing 100 along the extending direction of the hydrogen transport pipe 20, and the opening 102 is used for placing the hydrogen transport pipe 20 in the cavity 101. Optionally, to achieve a seal between the housing 100 and the hydrogen transport conduit 20, the hydrogen pipeline active safety device 10 further comprises a snap 110, a snap ring 120, and a first flexible seal 200.
The buckle 110 is fixedly disposed on an outer sidewall of the housing 100. One end of the snap ring 120 is fixedly disposed on the outer sidewall of the housing 100, the snap ring 120 and the buckle 110 are disposed at two ends of the opening 102 at an interval, and when the other end of the snap ring 120 is buckled to the buckle 110, the opening 102 is closed by pressing the snap ring 120. The first flexible seal 200 is disposed at the opening 102 of the housing 100. The buckle 110 and the snap ring 120 cooperate to fix the hydrogen pipeline active safety device 10 to a pipeline, and press the opening 102 of the housing 100 to close the opening, thereby achieving a sealing effect. The release can also be quick when the device needs to be repaired or replaced.
In an alternative embodiment, the hydrogen pipeline active safety device 10 can also achieve sealing between the housing 100 and the hydrogen transport pipeline 20 through two extension plates and a snap and a clamping groove. Two extension plates may be disposed on both sides of the opening 102. Two extension plates may be integrally formed with the housing 100. The fastener is arranged on one extending plate, the clamping groove is arranged on the other extending plate, and the fastener and the clamping groove are clamped to close the opening in the shell 100.
In this embodiment, the housing 100 has an opening 102 extending through the housing 100 along the direction of extension of the hydrogen transport pipe 20, so that the housing 100 can be detachably mounted without disassembling the hydrogen transport pipe 20.
Referring to fig. 4, in one embodiment, the housing 100 includes a first clamping body 130, a second clamping body 140, and a first flexible sealing member 200.
The first clamping body 130 has a first screw hole 131. The second clamping body 140 has a second screw hole 141. The first flexible sealing member 200 is disposed between the first clamping body 130 and the second clamping body 140. A connector detachably connects the first clamping body 130 and the second clamping body 140 through the second screw hole 141 and the first screw hole 131 to form the cavity between the first clamping body 130 and the second clamping body 140.
Specifically, the first clamping body 130 and the second clamping body 140 may be half shells having the same shape, and when the first clamping body 130 and the second clamping body 140 are butted, the housing 100 is formed. Screw holes are formed at corresponding positions of the first clamping body 130 and the second clamping body 140, so that the two half shells can be detachably connected. The first flexible sealing member 200 may be positioned at both ends of the first clamping body 130 and both ends of the second clamping body 140. Of course, the first flexible sealing member 200 may be disposed at a position where the first clamping body 130 and the second clamping body 140 are butted. At this time, a third screw hole 201 is formed at a corresponding position of the first flexible sealing member 200, so that a screw 150 passes through the first screw hole 131, the third screw hole 201 and the second screw hole 141 in sequence to detachably connect the first clamping body 130 and the second clamping body 140.
In this embodiment, the housing 100 may be detachably mounted to the housing 100 through the first clamping member 130 and the second clamping member 140 without disassembling the hydrogen transportation pipe 20.
Referring to fig. 5, the present application provides an active safety protection method for a hydrogen pipeline. The active safety protection method for the hydrogen pipeline is implemented by using the active safety protection device 10 for the hydrogen pipeline in any one of the above embodiments. The active safety protection method for the hydrogen pipeline comprises the following steps:
s10, wrapping the joint of the hydrogen transportation pipe 20 with the first cavity 101 inside the housing 100. In step S10, the shape and size of the housing 100 are not particularly limited as long as the portion of the hydrogen transport pipe 20 that is susceptible to leakage is ensured inside the housing 100. The housing 100 has a certain pressure-bearing capacity and a certain sealing property.
S20, the hydrogen gas in the chamber 101 is adsorbed by the hydrogen adsorbing member 500. In step S20, the hydrogen adsorbing member 500 may be disposed on a sidewall of the entire inner space of the housing 100. The hydrogen adsorbing member 500 may be provided only at a designated position of the housing 100. The hydrogen absorbing member 500 is made of any one or more of ferrotitanium, ferrotitanium-carbon alloy, calcium-manganese-nickel-aluminum alloy, rare earth lanthanum-nickel, complex, carbonaceous material or other hydrogen absorbing material.
S30, when the hydrogen leakage rate is greater than the hydrogen adsorption rate threshold of the hydrogen adsorption member 500, so that the pressure in the first cavity 101 reaches a first threshold, the gas enters one end of the sealing mechanism 300 through the communication pipe 104. In step S30, the structure and position of the sealing mechanism 300 are not particularly limited. In an alternative embodiment, the sealing mechanism 300 may be disposed inside the housing 100. The first threshold value may be set according to the structure of the sealing mechanism 300.
S40, when the pressure of the gas entering the end of the sealing mechanism 300 reaches the second threshold, the sealing mechanism 300 starts to push the sealing medium 301 into the sealing medium conveying channel 105, so as to fill the sealing groove 103. In step S40, the second threshold may be set according to the structure of the sealing mechanism 300. The material of the sealing medium 301 is not particularly limited as long as it has appropriate viscosity characteristics and setting time, can enter the sealing medium delivery channel 105 relatively quickly under pushing, and has a viscosity that is significantly increased or set quickly after a certain time after being released from the inside of the sealing mechanism 300. When the sealing medium 301 fills the sealing groove 103, the sealing medium does not flow out of the sealing groove 103 too much due to viscosity increase or condensation.
In this embodiment, the hydrogen pipeline active safety protection method creates an environment capable of restricting hydrogen leakage at the location where hydrogen leakage is likely to occur, and when the hydrogen leakage rate is low and the leakage amount is low, the hydrogen adsorbing member 500 is used to adsorb or react the leaked hydrogen, so as to reduce or eliminate the possibility of hydrogen explosion, and when the hydrogen leakage rate is high and the leakage amount is high, external energy or power source is not needed, and the sealing mechanism 300 is triggered to release the sealing medium 301 only by the pressure of the leaked hydrogen, thereby automatically sealing and isolating the hydrogen inside the casing 100 from the outside, and preventing hydrogen from escaping.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An active safety device for a hydrogen pipeline, comprising:
the hydrogen transportation device comprises a shell (100), wherein a first cavity (101) is formed in the shell (100), a hydrogen transportation pipeline (20) is arranged in the first cavity (101), a sealing groove (103) is formed between the shell (100) and the hydrogen transportation pipeline (20), and the shell (100) is detachably connected with the hydrogen transportation pipeline (20);
the hydrogen adsorption piece (500) is arranged on the inner side wall of the shell (100) and is used for adsorbing hydrogen in the cavity (101); and
a sealing mechanism (300) comprising:
a sealing medium storage bin (310) which is internally provided with a sealing medium (301) and one end of which is connected with the sealing groove (103) through a sealing medium conveying channel (105);
one end of the cylinder body (320) is communicated with the first cavity (101) through a communication pipeline (104), and the other end of the cylinder body (320) is communicated with the other end of the sealing medium storage bin (310); and
one end of the sealing medium pushing piece (330) is arranged in the sealing medium storage bin (310), the other end of the sealing medium pushing piece is arranged in the cylinder body (320), when the hydrogen leakage speed is larger than the adsorption speed threshold of the hydrogen adsorption piece (500) so that the pressure in the first cavity (101) reaches a first threshold, gas enters one end of the cylinder body (320) through the communication pipeline (104), when the gas pressure entering one end of the cylinder body (320) reaches a second threshold, the sealing medium pushing piece (330) moves towards the direction of the sealing medium storage bin (310) to push the sealing medium (301) to enter the sealing medium conveying channel (105) and further to be filled in the sealing groove (103), and the sealing medium pushing piece (330) is a double-head piston.
2. The active safety device of hydrogen gas pipeline according to claim 1, wherein the sealing medium pusher (330) is disposed in the sealing medium storage bin (310) with a smaller cross-sectional area than the sealing medium pusher (330) is disposed in the cylinder (320).
3. The active safety shield of hydrogen circuit of claim 2, wherein the sealing mechanism (300) further comprises:
and the air leakage hole (340) is arranged between the other end of the cylinder body (320) and the other end of the sealing medium storage bin (310).
4. The active safety device according to claim 3, wherein the housing (100) has a second cavity (106) in a side wall thereof, the second cavity (106) is connected to the first cavity (101) via the communication pipe (104), and the sealing mechanism (300) is disposed in the second cavity (106).
5. The active safety shield of hydrogen pipeline of claim 1 further comprising:
the first flexible sealing element (200) is arranged between the shell (100) and the hydrogen transportation pipeline (20) so as to form an insulating sealing environment in the first cavity (101), the sealing groove (103) is arranged on the outer surface of the first flexible sealing element (200) which is in direct contact with the hydrogen transportation pipeline (20), and the hydrogen adsorption element (500) is close to the inner side wall of the shell (100) and is arranged on the first flexible sealing element (200).
6. The active safety shield of hydrogen pipeline of claim 1 further comprising:
the hydrogen leakage alarm circuit (400) is arranged in the first cavity (101) and used for detecting the hydrogen content, the gas pressure value or the gas pressure variation in the first cavity (101) and carrying out early warning.
7. The active safety device of a hydrogen pipeline according to claim 1, wherein the material of the hydrogen absorbing member (500) is any one or more of ferrotitanium, ferrotitanium-carbon alloy, calcium-manganese-nickel-aluminum alloy, rare earth lanthanum-nickel, complex, carbonaceous material or other hydrogen absorbing material.
8. The active safety device in hydrogen gas pipeline according to claim 1, characterized in that the housing (100) has an opening (102) extending through the housing (100) in the direction of extension of the hydrogen transport pipeline (20), the opening (102) being used to place the hydrogen transport pipeline (20) in the cavity (101).
9. The active safety shield of hydrogen pipeline of claim 8, further comprising:
the buckle (110) is fixedly arranged on the outer side wall of the shell (100); and
and one end of the clamping ring (120) is fixedly arranged on the outer side wall of the shell (100), the clamping ring (120) and the buckle (110) are arranged at two ends of the opening (102) at intervals, and when the other end of the clamping ring (120) is clamped on the buckle (110), the opening (102) is closed by pressing the clamping ring (120).
10. A hydrogen pipeline active safety protection method, characterized in that the hydrogen pipeline active safety protection method is realized by using the hydrogen pipeline active safety protection device (10) of any one of claims 1 to 9, and the hydrogen pipeline active safety protection method comprises:
s10, wrapping the joint of the hydrogen transportation pipeline (20) by using the first cavity (101) in the shell (100);
s20, adsorbing the hydrogen in the cavity (101) by using a hydrogen adsorbing piece (500);
s30, when the hydrogen leakage speed is larger than the adsorption speed threshold of the hydrogen adsorption piece (500) so that the pressure in the first cavity (101) reaches a first threshold, gas enters one end of the sealing mechanism (300) through the communication pipeline (104);
s40, when the pressure of the gas entering one end of the sealing mechanism (300) reaches a second threshold value, the sealing mechanism (300) starts to push the sealing medium (301) to enter the sealing medium conveying channel (105), and then the sealing medium is filled in the sealing groove (103).
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| CN112128627B (en) * | 2020-09-24 | 2021-04-20 | 新疆河润水业有限责任公司 | Leakage analysis system based on pipe network on-line monitoring |
| CN114110442A (en) * | 2021-11-25 | 2022-03-01 | 安徽安凯汽车股份有限公司 | Hydrogen leakage early warning device for hydrogen fuel cell passenger car |
| CN114623373B (en) * | 2022-05-13 | 2022-10-25 | 河南氢枫能源技术有限公司 | Safe hydrogenation equipment shell |
| KR102522666B1 (en) * | 2022-10-31 | 2023-04-18 | (주)드림엔지니어링 | Hydrogen supply apparatus for fuel cell and its control method |
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