阅读说明：本技术 一种多用途可燃气体自然聚集危险性演示装置 (Multipurpose combustible gas natural gathering danger demonstration device ) 是由 董学胜 王思怿 薛晓康 张小沁 于 2020-06-24 设计创作，主要内容包括：本发明涉及一种多用途可燃气体自然聚集危险性演示装置,包括壳体、点火组件、气体引入组件、气体发生组件、排气组件,属于半封闭式测试演示装置,可用于常温常压下多元气体(蒸汽)燃爆特性测试演示。与现有技术相比,本发明可以对实际工艺和工况进行更加务实、有效的风险辨识,并通过双重泄压功能保证了演示的安全性问题,通过可调节的进气或气体发生功能实现了演示气体的普遍适用性,通过可编程性的点火、排气实现演示结果的精准性和便捷性。(The invention relates to a multipurpose combustible gas natural gathering danger demonstration device, which comprises a shell, an ignition assembly, a gas introduction assembly, a gas generation assembly and an exhaust assembly, belongs to a semi-closed test demonstration device, and can be used for testing and demonstrating the explosion characteristics of multi-component gas (steam) at normal temperature and normal pressure. Compared with the prior art, the invention can carry out more real-time and effective risk identification on the actual process and working conditions, ensures the safety problem of demonstration through the double pressure relief function, realizes the universal applicability of the demonstration gas through the adjustable gas inlet or gas generation function, and realizes the accuracy and convenience of the demonstration result through the programmable ignition and exhaust.)

1. A multipurpose combustible gas natural gathering danger demonstration device is characterized by comprising:

the device comprises a shell, wherein the middle part of the shell is provided with an operation port (4), and a sample containing vessel (3) is arranged in the operation port (4);

the ignition assembly comprises an upper spark plug (1) and a lower spark plug (6) which are respectively arranged at the upper end and the lower end of the shell;

one end of the gas introducing component is connected with the gas storage tank to be demonstrated, and the other end of the gas introducing component is communicated with the shell, so that the gas to be demonstrated is introduced into the shell;

the gas generation assembly is communicated with the shell and can guide reaction liquid to the sample containing vessel (3) so as to generate gas to be demonstrated in situ;

and the exhaust assembly comprises an upper exhaust valve (10) and a lower exhaust valve (5) which are respectively arranged at the upper end and the lower end of the shell.

2. A multi-purpose natural gas accumulation risk demonstration device according to claim 1, wherein said gas generating assembly comprises a liquid storage container and a filling valve (9) at the outlet of the liquid storage container.

3. A multi-purpose natural gas gathering risk demonstration device as claimed in claim 2, wherein said demonstration device further comprises a two-position three-way valve (7);

a first connecting port of the two-position three-way valve (7) is connected with the gas storage tank to be demonstrated;

a second connecting port of the two-position three-way valve (7) is connected with the liquid adding valve (9);

and a third connecting port of the two-position three-way valve (7) is connected into the shell through an inlet pipeline.

4. A multi-purpose apparatus for demonstrating the risk of natural accumulation of flammable gas as claimed in claim 3, wherein the end of said inlet pipeline away from said two-position three-way valve (7) is located above said sample-containing vessel (3).

5. A multi-purpose natural gas gathering risk demonstrating device as claimed in claim 1, wherein said housing is further provided with a polymer film coated area (2).

6. The multi-purpose natural gas gathering risk demonstrating device as claimed in claim 1, wherein the housing is made of transparent or translucent inorganic material.

7. A multi-purpose combustible gas natural gathering risk demonstration device according to claim 1 wherein the ignition assembly further comprises a power source connected to both the upper spark plug (1) and the lower spark plug (6).

8. The multipurpose demonstration device for demonstrating the natural gathering risk of combustible gas as claimed in claim 7, wherein the lower vent valve (5), the upper vent valve (10), the charging valve (9) and the two-position three-way valve (7) are all solenoid valves.

9. The multipurpose natural gas gathering risk demonstration device as claimed in claim 8, wherein the demonstration device further comprises a microprocessor and a touch display;

the microprocessor is electrically connected with the touch display to form human-computer interaction;

the microprocessor is connected with the power supply;

the microprocessor is respectively and electrically connected with the lower exhaust valve (5), the upper exhaust valve (10), the liquid adding valve (9) and the two-position three-way valve (7).

10. The multipurpose natural gas gathering danger demonstrating device according to claim 9, wherein when the gas to be demonstrated is lighter than air, the microprocessor controls the power supply to output current to the upper spark plug (1), and simultaneously controls the lower exhaust valve (5) to open;

when the gas to be demonstrated is heavier than air, the microprocessor controls the power supply to output current to the lower spark plug (6), and simultaneously controls the upper exhaust valve (10) to be opened;

when the gas to be demonstrated is mixed gas lighter than air and heavier than air, the microprocessor controls the power supply to output current in a programmed mode and controls the lower exhaust valve (5) and the upper exhaust valve (10) to be opened and closed in a programmed mode.

Technical Field

The invention relates to the field of combustible gas research equipment, in particular to a multipurpose combustible gas natural gathering danger demonstration device.

Background

With the development of modern economic construction, industrial production is rapidly advanced, gas and steam explosion accidents are increased, the destructive power is continuously intensified, people pay great cost for the gas and steam explosion accidents, the gas and steam explosion accidents frequently occur due to the lack of scientific and powerful safety monitoring, preventing and controlling measures, the frequency and the consequences of the accidents are in an ascending trend, huge economic losses are brought to the country, the life safety of people is seriously threatened, and the ecological and residential environments are deteriorated.

Explosion of a mixture of combustible gas and air and explosion of a mixture of steam of combustible liquid and air often occur in energy and processing industries (such as petroleum and natural gas) and chemical industries. Gas explosion can not only cause significant casualties, but also cause significant property damage. The occurrence of gas (steam) explosion accidents is increased along with the development of modern industry, the expansion of production scale and the application of new technology and new technology, because the operation scale is larger and larger, and the production processes related to flammability and explosiveness are increased gradually, so that the explosion accidents of mechanical equipment, high-pressure reaction equipment, raw materials in the production and storage processes and the like occur in the process, particularly in the industries of petroleum, chemical engineering, coal mines and the like. The gas explosion is difficult to predict before the occurrence, the accident forming process is not intuitive, so the accident is difficult to monitor, and people have panic psychology on the accident, so the explosion accident always covers mysterious veil. Therefore, in many chemical enterprises, the problem is often only slightly concerned, and few safety managers are willing to deal with the accidents too much, and the technical research and the precautionary measures in the related aspects are not strict.

Accidents caused by combustible gas, such as safety accidents caused by 'net red' self-heating hot pot products, wherein the self-heating hot pot contains a special heating bag for food, and 'aluminum powder' in the heating bag belongs to dangerous chemicals and is classified and labeled according to GB30000.13-2013 part 13 of chemical classification and labeling standard: the classification standard of substances and mixtures which emit flammable gases upon contact with water stipulates that the substances in the heat-generating bag belong to the substance and mixture class 1 or class 2 which emit flammable gases upon contact with water; according to the classification standard of the United nations' recommendation and regulation and standard book on dangerous goods transportation, the self-heating convenient hot pot products belong to dangerous goods in transportation. According to our experimental results, it is typical that each heating package can produce roughly 40 liters of hydrogen. The flammability limit of hydrogen in air is 4% to 75.6%, although other closed or semi-closed conditions, such as in a vehicle, present similar risks. The self-heating food can bring the risk of deflagration when being used in a closed space, and has great potential safety hazard when being used intensively in a large amount in some public places. Many tourists are unaware of the fact that hydrogen is generated during travel at a travel bus or a long-distance bus. The large-area and large-scale use of self-heating chafing dishes can cause the accumulation of hydrogen in vehicles. Especially in summer, the air conditioner is started, and the whole compartment is a closed environment. In this case, if the lower explosive concentration is reached, an ignition source is encountered, and the lighter is not required, a static charge may be present, or some spark from the circuit, may be sufficient to initiate a deflagration event. Furthermore, the Leptospira cells also belong to substances and mixtures that emit flammable gases in the presence of water. However, the volatile and flammable gas-containing articles such as vehicle perfume, air freshener, alcohol disinfectant and the like are also very easy to cause explosion accidents. In addition, liquefied gas, petroleum gas, pressure tanks, aerosols, and the like can also bring potential safety hazards due to the inclusion of flammable gases. Therefore, the development of the multifunctional integrated combustible gas danger test demonstration device for multiple purposes is very important.

In order to control the occurrence of gas (steam) explosion disaster accidents and ecological accidents thereof, the explosion characteristics of the gas (steam) explosion disaster accidents and the ecological accidents thereof need to be studied deeply, and a danger detection demonstration technology is developed. And the safety testing technology and the economic benefit and the social benefit are mutually promoted and supplemented. The improvement of the risk test demonstration technology not only can reduce property loss and casualties, but also can bring healthy production order and long-term stable economic and social benefits. Therefore, the development of a gas (steam) explosion risk test demonstration device is very necessary. The method solves the problem of gas (steam) blasting at present, and the key is to process the relationship between scientific research and detection evaluation. On one hand, research on the aspect of gas (steam) explosion safety testing needs to be accelerated, and on the other hand, preparation of a combustible gas danger detection demonstration device needs to be enhanced.

Chinese patent CN105928978A discloses a combustible gas explosion testing device for a narrow and long restricted space, which comprises an ignition device, a pressure-resistant closed container, a combustible gas tank, an air compressor and a PLC control assembly device. Chinese patent CN102937606A discloses a device for testing explosion limit of combustible gas under high temperature condition, which comprises a temperature data acquisition system, a heating temperature control system and a gas distribution air intake/exhaust purging system. The device is only suitable for gas samples, and is not suitable for articles which release inflammable gases when meeting water and articles which generate volatile gases. In addition, the device is not suitable for normal temperature and pressure test and demonstration of multi-purpose multi-component gas, and combustible gas cannot be naturally gathered to improve the accuracy of detection and demonstration.

Therefore, for the existing natural gas gathering demonstration device, the safety, convenience, accuracy of result and general applicability of the target gas are all technical problems to be further improved.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a multipurpose combustible gas natural gathering danger demonstration device, which ensures the safety problem of demonstration through a double pressure relief function, realizes the universal applicability of demonstration gas through an adjustable gas inlet or gas generation function, and realizes the accuracy and convenience of demonstration results through programmable ignition and exhaust.

The purpose of the invention can be realized by the following technical scheme:

the invention discloses a multipurpose combustible gas natural gathering danger demonstration device, which comprises a shell, an ignition assembly, a gas introducing assembly, a gas generating assembly and an exhaust assembly, belongs to a semi-closed type test demonstration device, can be used for testing and demonstrating the explosion characteristics of multi-component gas (steam) at normal temperature and normal pressure, and can carry out more practical and effective risk identification on actual processes and working conditions. Wherein specifically:

an operation opening is formed in the middle of the shell, a sample containing vessel is arranged in the operation opening, and the sample containing vessel can contain samples;

the ignition assembly comprises an upper spark plug and a lower spark plug which are respectively arranged at the upper end and the lower end of the shell;

one end of the gas introducing component is connected with a gas storage tank to be demonstrated, and the other end of the gas introducing component is communicated with the shell, so that the gas to be demonstrated is introduced into the shell;

the gas generation assembly is communicated with the shell and can guide reaction liquid to the sample containing vessel so as to generate gas to be demonstrated;

the exhaust assembly comprises an upper exhaust valve and a lower exhaust valve which are respectively arranged at the upper end and the lower end of the shell.

Furthermore, the shell is provided with end sockets at the upper end and the lower end, and the end sockets are preferably pointed or hemispherical.

Furthermore, the upper spark plug and the lower spark plug are symmetrically arranged at the top end of the end enclosure, and the upper exhaust valve and the lower exhaust valve are arranged on one side of the end enclosure.

Further, the gas generating assembly comprises a liquid storage container and a liquid charging valve arranged at a liquid outlet of the liquid storage container.

Further, the demonstration device also comprises a two-position three-way valve;

the first connecting port of the two-position three-way valve is connected with the gas storage tank to be demonstrated;

the second connecting port of the two-position three-way valve is connected with the liquid adding valve;

and a third connecting port of the two-position three-way valve is connected into the shell through an inlet pipeline.

Furthermore, one end of the inlet pipeline, which is far away from the two-position three-way valve, is arranged above the sample containing vessel. If the mode is switched to the gas generation mode, reaction liquid in the liquid storage container can be added into the sample containing vessel, so that gas to be demonstrated is generated in situ.

Furthermore, a polymer film pasting area is further arranged on the shell. The polymer film attaching area plays a role in pressure relief through the explosion of the polymer film, and meanwhile, the polymer film can be attached to the operation opening and plays a role in pressure relief together with the polymer film attaching area.

Further, after the combustible gas danger demonstration test is completed, the safety pressure relief port is opened to ensure the demonstration safety.

Further, the shell is made of transparent or semitransparent inorganic materials. The transparent inorganic material is preferred, and a better demonstration effect can be realized.

Further, the ignition assembly also includes a power source connected to both the upper spark plug and the lower spark plug.

Further, the lower exhaust valve, the upper exhaust valve, the liquid adding valve and the two-position three-way valve are all electromagnetic valves.

Further, the presentation device further comprises a microprocessor and a touch display;

the microprocessor is electrically connected with the touch display to form human-computer interaction;

the microprocessor is connected with the power supply; the power supply receives the electric signal given by the microprocessor and then sends current to the upper spark plug or the lower spark plug to realize the generation of electric sparks at corresponding positions.

The microprocessor is respectively and electrically connected with the lower exhaust valve, the upper exhaust valve, the liquid feeding valve and the two-position three-way valve. The microprocessor sends out command signals to control the opening or valve position switching of the lower exhaust valve, the upper exhaust valve, the liquid adding valve and the two-position three-way valve. The touch display constitutes human-computer interaction and simultaneously displays the state and the mode of the presentation device.

Further, the microprocessor is an ARM processor.

Further, when the gas to be demonstrated is lighter than air, the microprocessor controls the power supply to output current to the upper spark plug, and simultaneously controls the lower exhaust valve to be opened;

when the gas to be demonstrated is heavier than air, the microprocessor controls the power supply to output current to the lower spark plug, and simultaneously controls the upper exhaust valve to be opened;

when the gas to be demonstrated is mixed gas lighter than air and heavier than air, the microprocessor controls the power supply to output current in a programmed mode and controls the lower exhaust valve and the upper exhaust valve to open and close in the programmed mode.

Compared with the prior art, the invention has the following beneficial effects:

1. the device has the multipurpose function, can detect various combustible gases simultaneously, and comprises 1) substances or articles which can emit combustible gases when meeting water, such as a hot pot heating bag and the like; 2) volatile gaseous articles such as car perfume, etc.; 3) flammable gases, such as liquefied gases and the like. The gas is convenient to naturally gather, and the detection precision is improved.

2. The device has the advantages of simple structure, low cost, high sensitivity, safe and reliable operation and reduction of pollution to the atmosphere. The device has the advantages of simple operation, convenient manufacture, lower cost, reliability and safety when the device directly detects the danger of the combustible gas, and simultaneously can reduce the workload of maintenance personnel, is convenient to carry and saves labor force.

3. This presentation device belongs to semi-enclosed testing arrangement, and the device is equipped with safe pressure release mouth, can in time release pressure after the emergence of blasting, and protection device is not damaged by the detonation pressure.

4. When various mixed gases are demonstrated and tested, self-set demonstration test intervals can be adopted, the testing method is flexible and convenient, and the multi-component combustible gas can be directly and rapidly judged and screened conveniently.

5. The device can be used for the test of the explosion characteristics of multi-element gas (steam) at normal temperature and normal pressure, can identify actual process and working conditions more practicalized and effective risks, changes the dangerous characteristic test of single gas (steam) into the test demonstration of the explosion dangerousness of various gases (steam) in actual process conditions, and improves the production actual process safety test demonstration level in the related field of gas (steam).

6. The device can realize completely automatic program operation, particularly in the case of multi-component mixed gas with density difference, can carry out ignition test by a microprocessor program, and adaptively makes exhaust position change, and compared with the existing demonstration device, the result is more accurate.

Drawings

FIG. 1 is a schematic structural diagram of a multi-purpose combustible gas natural gathering risk demonstration device according to the present invention.

In the figure: 1-upper sparking plug, 2-polymer film attaching area, 3-sample containing vessel, 4-operation port, 5-lower vent valve, 6-lower sparking plug, 7-two-position three-way valve, 8-gas introducing port, 9-liquid adding valve and 10-upper vent valve.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments.

The device for demonstrating the natural gathering danger of the combustible gas has multiple functions, can detect multiple combustible gases simultaneously, and comprises 1) substances or articles which can emit the combustible gas when meeting water, such as a hot pot heating bag and the like; 2) volatile gaseous articles such as car perfume, etc.; 3) flammable gases, such as liquefied gases and the like. The gas is convenient to naturally gather, and the detection precision is improved.

The device for demonstrating the natural gathering danger of the combustible gas has simple structure and low cost; high sensitivity, safe and reliable operation and reduced pollution to the atmosphere. The device has the advantages of simple operation, convenient manufacture, lower cost, reliability and safety when the device directly detects the danger of the combustible gas, and simultaneously can reduce the workload of maintenance personnel, is convenient to carry and saves labor force.

This testing arrangement belongs to semi-enclosed testing arrangement, and the device is equipped with safe pressure release mouth, can in time release pressure after the emergence of blasting, and protection device is not damaged by the detonation pressure. The device can be used for the test of the explosion characteristic of multi-component gas (steam) under normal temperature and normal pressure, can carry out more real-time and effective risk identification on actual process and working conditions, and is changed from the dangerous characteristic test of research single gas (steam) into the test demonstration of the explosion danger of various gases (steam) in actual process conditions, thereby improving the production actual process safety test level of the related fields of gas (steam).