CN111899477A - Chemical plant toxic gas treatment alarm device and method - Google Patents

Chemical plant toxic gas treatment alarm device and method Download PDF

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Publication number
CN111899477A
CN111899477A CN202010753926.3A CN202010753926A CN111899477A CN 111899477 A CN111899477 A CN 111899477A CN 202010753926 A CN202010753926 A CN 202010753926A CN 111899477 A CN111899477 A CN 111899477A
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China
Prior art keywords
pressure relief
pressure
toxic gas
hole
box body
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Withdrawn
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CN202010753926.3A
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Chinese (zh)
Inventor
付帅
佀庆民
郭昕曜
李镇
牛林清
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Zhengzhou University of Aeronautics
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Zhengzhou University of Aeronautics
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Priority to CN202010753926.3A priority Critical patent/CN111899477A/en
Publication of CN111899477A publication Critical patent/CN111899477A/en
Withdrawn legal-status Critical Current

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    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/02Alarms for ensuring the safety of persons
    • G08B21/12Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
    • G08B21/14Toxic gas alarms

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Emergency Alarm Devices (AREA)

Abstract

The invention relates to the field of harmful gas treatment equipment, in particular to a chemical plant toxic gas treatment alarm device and method. The monitoring device aims to solve the problems that in the prior art, the monitoring device for toxic gas is high in cost, complex in equipment and high in requirement on the level of workers. The invention is installed at the joint of the flanges of the butt-jointed pipelines in a way that the box body and the cover body are matched, the box body and the cover body are provided with pressure relief through holes matched with the outer diameter of the pipelines, and sealing rings are arranged in the pressure relief through holes; a sealing ring is arranged between the box body and the cover body, and an explosion-proof sealing cavity is formed between the box body and the cover body; the pressure measuring mechanism comprises a pressure relief through hole arranged on the side edge of the box body, a blocking block is arranged on the pressure relief through hole, and the blocking block is sequentially communicated with the light pressure relief monitoring mechanism, the intermittent pressure relief mechanism and the security pressure relief mechanism by taking the depth of the blocking block in the pressure relief through hole as a reference. Has the advantages that: the device has the advantages of realizing real-time monitoring, having low requirement on the labor skill level of workers, having low overall cost, having various overall functions of the device and being convenient for adjustment according to requirements in production.

Description

Chemical plant toxic gas treatment alarm device and method
Technical Field
The invention relates to the field of harmful gas treatment equipment, in particular to a chemical plant toxic gas treatment alarm device and method.
Background
The treatment of toxic gas is an important guarantee for maintaining safe production in chemical enterprises, and the explosion prevention of factory buildings and the health safety of workers are designed, so that no flash is caused.
At present, the method for treating the waste gas and the discharged toxic gas comprises the following steps: (1) the combustion method comprises high-temperature combustion and catalytic combustion, wherein the high-temperature combustion and the catalytic combustion need additional fuel for combustion, so that the heat energy is recycled when the method is used; the catalytic combustion has low energy consumption, but in the initial working period, the waste gas is heated to the ignition temperature by electric heating, so the catalytic combustion is not suitable for occasions with frequent starting and stopping. It is not suitable in view of the fact that the heat recovered by the high-temperature combustion method exceeds the heat energy required for production. And the investment is too large when the catalytic combustion is directly adopted. (2) Absorption method, i.e. adopting proper absorbent (such as diesel oil, kerosene, water and other media) to absorb in an absorption tower, separating solvent from absorption liquid after absorbing at a certain concentration, recovering solvent, reusing absorption liquid or separately processing absorption liquid, and the key point of adopting the method is the selection of the absorbent. The solvent and the absorbent are difficult to separate, and thus the application thereof is limited. (3) The active carbon adsorption method is characterized in that porous active carbon or active carbon fiber is adopted to adsorb organic waste gas, low-pressure steam is used for regeneration after saturation, solvent waste gas discharged during regeneration is condensed and separated by water to recover the solvent, and the method is suitable for discontinuous treatment processes and particularly has good effect on recovering the solvent in the low-concentration organic waste gas. (4) The condensation method mainly utilizes cold medium to treat high-temperature organic waste gas steam, and can effectively recover solvent. The quality of the treatment effect is related to the temperature of the refrigerant, the treatment efficiency is relatively lower than that of other methods, and the method is suitable for treating high-concentration waste gas.
However, in the prior art, the following defects still exist, and specific workers consider the defects; 1. the accurate monitoring is realized by depending on precise electronic products, so that the cost is high and the service life is short; 2. at the present stage, the equipment lacks classification treatment on the discharge capacity, and mostly belongs to supersaturation type protection, so that the overall cost is high; 3. the overall performance of the preparation is outstanding, the preparation is often designed and arranged according to the characteristics of each factory building, and once single-point toxic gas overflow and leakage are found, the whole preparation treatment work is processed, so that the flexibility of equipment is low; 4. and the current equipment has high requirements on the skills of workers.
Disclosure of Invention
The invention aims to solve the problems that the toxic gas monitoring equipment in the prior art is high in cost, complex in equipment and high in requirement on the level of workers.
The specific scheme of the invention is as follows:
a chemical plant toxic gas treatment alarm device is designed, and is installed at a flange joint of a butt joint pipeline in a mode that a box body and a cover body are matched, wherein a pressure relief through hole matched with the outer diameter of the pipeline is formed in the box body and the cover body, and a sealing ring is arranged in the pressure relief through hole; a sealing ring is arranged between the box body and the cover body, and an explosion-proof sealing cavity is formed between the box body and the cover body; the side of box, the top in explosion-proof sealed chamber are equipped with pressure measurement mechanism, pressure measurement mechanism is including setting up the release through-hole at the box side, be equipped with the sprue on the pressure release through-hole to the degree of depth that the sprue is in the pressure release through-hole is the benchmark, the sprue allies oneself with light pressure release monitoring mechanism, intermittent type pressure release mechanism and security personnel pressure release mechanism in proper order, be equipped with the valve formula transform structure that the alternative was opened between intermittent type pressure release mechanism and security personnel pressure release mechanism, the bottom of box is sunken to inside.
In specific implementation, light pressure release monitoring mechanism is including just right the shower nozzle of pressure release through-hole installation, the soap lye is filled to the shower nozzle internal pressure, the soap lye check ring that transparent material made is equipped with outside the through-hole.
In the concrete implementation, valve formula transform structure includes the cuboid frame, the forced induction piece is installed respectively to the inboard above the cuboid frame, and the inboard below is equipped with the through-hole in order to connect sealed pressure release pipe, the horizontal center of cuboid frame with the center pin coincidence of case, middle part suit on the pipeline, with be equipped with reset spring between the pipeline, the both sides of cuboid frame are equipped with the locating piece, and the corresponding two sides at the box are equipped with cyclic annular constant head tank.
In specific implementation, a warning lamp is arranged on the pressure sensing block and electrically connected with the control mechanism.
In specific implementation, the intermittent pressure relief mechanism comprises a pressure relief reset spring arranged between a pressure relief through hole and the blocking blocks, a stop block is arranged above the blocking blocks, a pressure sensing block for sensing the position of the stop block is arranged above the stop block, and the pressure sensing block is electrically connected with the control mechanism.
In specific implementation, the security protection pressure relief mechanism comprises a sealing pressure relief pipe communicated with the explosion-proof sealing cavity, a cross-shaped positioning support is arranged in the sealing pressure relief pipe, and a magnetic suction element is arranged at the central point of the positioning support to adsorb the plug, so that the opening of a pressure relief passage is formed.
In specific implementation, a pressure gauge is arranged on the side face of the box body, and a probe of the pressure gauge is located in the explosion-proof sealing cavity.
In specific implementation, the sealing pressure relief pipe and the cuboid frame are provided with a self-locking element therebetween, and the self-locking element comprises a plug pin type self-locking element or a spring type self-locking element.
The invention also relates to a toxic gas treatment alarm method, which uses the chemical plant toxic gas treatment alarm device and comprises the following steps:
(1) and monitoring at fixed time to obtain a result: spraying and adding soapy water to the plug of the equipment by taking one time per working day as frequency, observing whether bubbles occur, simultaneously, regularly observing whether bubbles occur by taking one time per half day as frequency, recording the bubble speed, recording the record and reporting, and opening an intermittent pressure relief mechanism by using a valve switching mechanism when the bubbles exceed a grid;
(2) judging the processing mode according to the result: when the ejection frequency of the intermittent pressure relief mechanism is higher than one time per second, the switching mechanism of the switching valve is switched and locked, the safety pressure relief mechanism is started, and meanwhile, the pipeline is dismounted for maintenance after the integral shutdown.
The invention has the beneficial effects that:
the sealing gasket is arranged at the necessary flange joint according to actual needs, so that the pertinence is strong, the flexibility of the installation position is high, and the range of the diameter of the pipeline is large after the sealing gasket is combined;
the monitoring can be carried out in time, and according to the convenience in observation and the leakage condition, the processing alarm mode can be determined, so that the monitoring cost is reduced, and the personal safety of workers is protected;
the design of the valve type conversion structure is convenient for the rapid conversion and adjustment of the pressure relief mode, the reaction is rapid, the operation is simple, and meanwhile, the limit mode of the annular positioning groove is convenient for workers to operate;
the design of the cross-shaped support is convenient for positioning, the magnetic attraction is utilized to prevent the blocking block from being further guided to be lifted, and the blocking block is slightly pressed in the pipeline which is externally connected;
the whole equipment realizes effective sealing and locking of the equipment by using a spring, a bolt and other low-cost standard parts;
the bottom of the box body is designed to form an explosion-proof protective film from the other side, and a layer of protection is realized;
the combination of the alarm with a simple circuit, instantaneous peak sound and photoelectric alarm saves cost.
The applicant thinks that through the technical scheme, a simple low-cost device convenient for flexibly adjusting the installation position can be formed, the patrol of the device does not need to pass through a complex circuit control system, a small leakage condition worker can realize the patrol in the process, when the leakage condition is poor, the leakage condition worker can be guided to quickly adjust through a radio telegram in time, the pressure relief is led out and then is processed, and the normal work of a factory building is not influenced to the maximum extent.
Drawings
FIG. 1 is a perspective view of the structure of the present invention;
FIG. 2 is another perspective view of the structure of the present invention;
FIG. 3 is a front view of the structure of the present invention;
FIG. 4 is a top view of the structure of the present invention;
FIG. 5 is a side view of the structure of the present invention;
FIG. 6 is a sectional view taken along line A-A in FIG. 5;
FIG. 7 is a cross-sectional view of another station of the present invention;
names of components in the drawings: 1. a box body; 2. a cover body; 3. butting pipelines; 4. an explosion-proof sealed cavity; 5. a plug; 6. a pressure sensing block; 7. a stopper; 8. a check ring of the soap liquid; 9. a pressure relief through hole; 10. a rectangular parallelepiped frame; 11. positioning and supporting; 12. an annular positioning groove; 13. positioning blocks; 14. a limiting reset element of the cuboid frame; 15. a pressure gauge; 16. sealing the pressure relief pipe; 17. a block return spring; 18. a pressure relief return spring; 19. magnetically attracting the original; 20. a pin hole; 21. limiting concave holes; 22. limiting spring of valve type switching structure.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example 1
A chemical plant toxic gas treatment alarm device is designed to be arranged at the flange joint of a butt joint pipeline 3 in a mode that a box body 1 and a cover body 2 are matched with each other, a pressure relief through hole matched with the outer diameter of the pipeline is formed in the box body 1 and the cover body 2, and a sealing ring is arranged in the pressure relief through hole; a sealing ring is arranged between the box body 1 and the cover body 2, and an explosion-proof sealing cavity 4 is formed between the box body 1 and the cover body 2; at the side of box 1, the top in explosion-proof sealed chamber 4 is equipped with pressure measurement mechanism, pressure measurement mechanism is equipped with the sprue including setting up the release through-hole 9 at box 1 side on the pressure release through-hole to the degree of depth that the sprue is in the pressure release through-hole is the benchmark, the sprue UNICOM light pressure release monitoring mechanism in proper order, intermittent type pressure release mechanism and security personnel pressure release mechanism, be equipped with the valve formula transform structure that the alternative was opened between intermittent type pressure release mechanism and the security personnel pressure release mechanism, the bottom of box 1 is sunken to inside. Light pressure release monitoring mechanism is including just to the shower nozzle of pressure release through-hole installation, and the soap lye is filled to the shower nozzle internal pressure, and the through-hole is equipped with soap lye check ring 8 that transparent material made outward. The internal depression provides a pressure relief way for pressure surge to prevent the situation that the block is blocked and the internal leakage occurs, so that the safety performance of the equipment is further improved.
The valve type conversion structure comprises a cuboid frame 10, a pressure sensing block 6 is respectively installed on the inner side of the upper surface of the cuboid frame, a through hole is formed in the inner side of the lower surface of the cuboid frame to connect a sealing pressure relief pipe 16, the horizontal center of the cuboid frame 10 coincides with the central shaft of a box body 1, the middle of the cuboid frame is sleeved on a pipeline, a reset spring is arranged between the cuboid frame 10 and the pipeline, positioning blocks 13 are arranged on two sides of the cuboid frame 10, and annular positioning grooves 12 are formed in the two corresponding sides of the.
And a warning lamp is arranged on the pressure sensing block 6 and is electrically connected with the control mechanism.
Intermittent type pressure release mechanism is equipped with dog 7 including installing pressure release reset spring 18 between release through-hole 9 and sprue above the sprue, and the top of dog 7 is equipped with the forced induction piece 6 of response dog 7 position, and the control mechanism is connected to forced induction piece 6 electricity.
The security pressure relief mechanism comprises a sealing pressure relief pipe 16 communicated with the explosion-proof sealing cavity 4, a cross-shaped positioning support 11 is arranged in the sealing pressure relief pipe 16, a magnetic suction element 19 is arranged at the central point of the positioning support 11 to suck the plug 5, and the opening of a pressure relief passage is formed.
Be equipped with the auto-lock original paper between sealed pressure release pipe 16 and cuboid frame 10, the auto-lock original paper includes bolt formula auto-lock original paper or spring auto-lock original paper.
In the course of the work, appointed relevant workman supervisory equipment condition, for example early tour round, it does not have the bubble to observe in every soap lye check retaining ring 8, does not have the bubble, says that the condition of not revealing takes place promptly, if there is a small amount of bubbles to explain that there is a small amount of circumstances of revealing takes place, can in time record and report, because the gas leakage volume is low, can arrange personnel in certain time to handle, does not start alarm device this moment, does not influence normal production.
If the leakage amount develops to a certain degree, the intermittent pressure relief mechanism works, the gas can push out the plug 5, so that the plug activates the pressure sensing block 6, the electric control circuit is connected, the automation degree is improved, an alarm device can be further installed to form linkage, the sound and light alarm response is given out, related workers are guided to evacuate as appropriate, the health of the workers is protected, and in the working state, the gravity of the plug, the spring and the gas thrust act together to form the up-and-down motion of the plug. A plurality of springs are involved in the whole process for resetting.
If the pressure sensing block 6 senses the pressure of the plug 5 for a long time, a person wearing the protective equipment is assigned to enter the field, the valve type conversion structure is rotated, and the work of the intermittent pressure relief mechanism is changed into the work of the safety pressure relief mechanism;
the work of pressure relief mechanism is including the sealed of sealed pressure release pipe 16 with through-hole department, and in this state, end cap 5 is adsorbed, and whole pipeline together with, can derive gas to the outside, and then realize the discharge and the subsequent processing of toxic gas, the holistic maintenance of the equipment factory building of being convenient for. In the whole process, sealing strips are arranged at the parts matching positions.
In the invention, the equipment can be arranged at each pipeline joint, is flexible to install, is simple and convenient to maintain, and has low requirement on the technical level of workers. The toxic gas treatment alarm method for the chemical plant comprises the following steps:
(1) and monitoring at fixed time to obtain a result: spraying soap water to the plug 5 of the equipment by taking one time per working day as frequency, observing whether bubbles occur, simultaneously, regularly observing whether bubbles occur by taking one time per half day as frequency, recording the bubble speed, recording the report, and opening an intermittent pressure relief mechanism by using a valve switching mechanism when the bubbles exceed a grid;
(2) judging the processing mode according to the result: when the ejection frequency of the intermittent pressure relief mechanism is higher than one time per second, the switching mechanism of the switching valve is switched and locked, the safety pressure relief mechanism is started, and meanwhile, the pipeline is dismounted for maintenance after the integral shutdown.
In this embodiment, the pin hole 20, the pin and the spring are combined to achieve self-locking positioning during valve-type pressure relief switching.
Example 2
The principle of the present embodiment is different from that of embodiment 1 in that: the side of the box body 1 is provided with a pressure gauge 15, and a probe of the pressure gauge 15 is positioned in the explosion-proof sealed cavity 4.
The pressure value in the explosion-proof sealing ring can be observed in real time, and the safety state of the explosion-proof sealing ring is guaranteed.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. The utility model provides a chemical plant toxic gas handles alarm device which characterized in that: the pressure relief device is arranged at the joint of flanges of a butt joint pipeline (3) in a way that a box body (1) and a cover body (2) are matched, a pressure relief through hole matched with the outer diameter of the pipeline is formed in the box body (1) and the cover body (2), and a sealing ring is arranged in the pressure relief through hole; a sealing ring is arranged between the box body (1) and the cover body (2), and an explosion-proof sealing cavity (4) is formed between the box body (1) and the cover body (2); the side of box (1), the top in explosion-proof sealed chamber (4) are equipped with pressure measurement mechanism, pressure measurement mechanism is including setting up release through-hole (9) at box (1) side, be equipped with the sprue on the pressure release through-hole to the degree of depth that the sprue is in the pressure release through-hole is the benchmark, the sprue allies oneself with light pressure release monitoring mechanism, intermittent type pressure release mechanism and security personnel pressure release mechanism in proper order, be equipped with the valve formula transform structure that the alternative was opened between intermittent type pressure release mechanism and security personnel pressure release mechanism, the bottom of box (1) is sunken to inside.
2. The chemical plant toxic gas treatment alarm device of claim 1, wherein: the light pressure release monitoring mechanism comprises a spray head which is right opposite to the pressure release through hole, soap liquid is filled in the spray head, and a soap liquid check ring (8) made of transparent materials is arranged outside the through hole.
3. The chemical plant toxic gas treatment alarm device of claim 1, wherein: the valve type conversion structure comprises a cuboid frame (10), pressure induction blocks (6) are respectively installed on the inner side of the upper surface of the cuboid frame, a through hole is formed in the inner side of the lower surface of the cuboid frame to connect a sealing pressure relief pipe (16), the horizontal center of the cuboid frame (10) coincides with the central shaft of a box body (1), the middle of the cuboid frame is sleeved on a pipeline, a reset spring is arranged between the pipelines, positioning blocks (13) are arranged on the two sides of the cuboid frame (10), and annular positioning grooves (12) are correspondingly formed in the two sides of the box body (1).
4. The chemical plant toxic gas treatment alarm device of claim 1, wherein: and a warning lamp is arranged on the pressure sensing block (6), and the warning lamp is electrically connected with the control mechanism.
5. The chemical plant toxic gas treatment alarm device of claim 1, wherein: intermittent type pressure release mechanism including install in release through-hole (9) with pressure release reset spring (18) between the sprue top is equipped with dog (7), the top of dog (7) is equipped with forced induction piece (6) of response dog (7) position, forced induction piece (6) electricity connection control mechanism.
6. The chemical plant toxic gas treatment alarm device of claim 5, wherein: the safety protection pressure relief mechanism comprises a sealing pressure relief pipe (16) communicated with the inside of the explosion-proof sealing cavity (4), a cross-shaped positioning support (11) is arranged in the sealing pressure relief pipe (16), and a magnetic suction element (19) is arranged at the central point of the positioning support (11) to adsorb the choke plug (5) to form opening of a pressure relief passage.
7. The chemical plant toxic gas treatment alarm device of claim 6, wherein: the side of the box body (1) is provided with a pressure gauge (15), and a probe of the pressure gauge (15) is positioned in the explosion-proof sealing cavity (4).
8. The chemical plant toxic gas treatment alarm device of claim 6, wherein: sealed pressure release pipe (16) with be equipped with the auto-lock original paper between cuboid frame (10), the auto-lock original paper includes bolt formula auto-lock original paper or spring auto-lock original paper.
9. A toxic gas treatment alarm method using the chemical plant toxic gas treatment alarm device according to claim 1, comprising the steps of:
(1) and monitoring at fixed time to obtain a result: spraying and adding soapy water to a plug (5) of the equipment by taking one time per working day as frequency, observing whether bubbles occur, simultaneously, regularly observing whether bubbles occur by taking one time per half day as frequency, recording the speed of the bubbles, recording the report, and opening an intermittent pressure relief mechanism by using a valve switching mechanism when the bubbles exceed a block;
(2) judging the processing mode according to the result: when the ejection frequency of the intermittent pressure relief mechanism is higher than one time per second, the switching mechanism of the switching valve is switched and locked, the safety pressure relief mechanism is started, and meanwhile, the pipeline is dismounted for maintenance after the integral shutdown.
CN202010753926.3A 2020-07-30 2020-07-30 Chemical plant toxic gas treatment alarm device and method Withdrawn CN111899477A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010753926.3A CN111899477A (en) 2020-07-30 2020-07-30 Chemical plant toxic gas treatment alarm device and method

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Application Number Priority Date Filing Date Title
CN202010753926.3A CN111899477A (en) 2020-07-30 2020-07-30 Chemical plant toxic gas treatment alarm device and method

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CN111899477A true CN111899477A (en) 2020-11-06

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CN202010753926.3A Withdrawn CN111899477A (en) 2020-07-30 2020-07-30 Chemical plant toxic gas treatment alarm device and method

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101963286A (en) * 2009-07-23 2011-02-02 丰田工业有限公司 Air pressure equipment assembly combined with safety pressure relief device
CN204696182U (en) * 2015-05-07 2015-10-07 深圳市慧通天下科技股份有限公司 Anti-explosion battery box
CN206656625U (en) * 2017-04-11 2017-11-21 北京市煤气热力工程设计院有限公司 A kind of shell-and-tube heat exchanger for heated by natural gas of band leakage warning function
CN208877374U (en) * 2018-03-16 2019-05-21 维亚生物科技(上海)有限公司 A kind of autoclave of intermittent automatic exhaust device
CN209638786U (en) * 2019-03-12 2019-11-15 绍兴柯桥中国轻纺城管道燃气有限公司 A kind of natural gas line decompression alarming apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101963286A (en) * 2009-07-23 2011-02-02 丰田工业有限公司 Air pressure equipment assembly combined with safety pressure relief device
CN204696182U (en) * 2015-05-07 2015-10-07 深圳市慧通天下科技股份有限公司 Anti-explosion battery box
CN206656625U (en) * 2017-04-11 2017-11-21 北京市煤气热力工程设计院有限公司 A kind of shell-and-tube heat exchanger for heated by natural gas of band leakage warning function
CN208877374U (en) * 2018-03-16 2019-05-21 维亚生物科技(上海)有限公司 A kind of autoclave of intermittent automatic exhaust device
CN209638786U (en) * 2019-03-12 2019-11-15 绍兴柯桥中国轻纺城管道燃气有限公司 A kind of natural gas line decompression alarming apparatus

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付帅: "《基于钻孔气体漏失量法巷帮卸压带宽度确定研究》", 《中国安全生产科学技术》 *

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