阅读说明：本技术 一种定容绝热燃烧仓装置及方法 (Constant-volume heat-insulation combustion chamber device and method ) 是由 王海洋 李更天 刘成锋 王宁 刘骏 于 2021-01-28 设计创作，主要内容包括：本发明公开了一种定容绝热燃烧仓装置及方法,所述定容绝热燃烧仓装置包括箱体、实验舱单元、加热单元、测量单元和电气控制单元；所述实验舱单元设于所述箱体内,包括同轴设置的外胆舱结构和内胆舱结构,所述外胆舱结构和内胆舱结构均为密闭结构；所述加热单元设于所述内胆舱结构内；所述测量单元与所述实验舱单元相连；所述电气控制单元与所述测量单元和加热单元相连,控制所述加热单元的工作状态,以及控制所述测量单元按照预设的要求对位于内胆舱结构内的待测物进行测量。本发明中的实验舱单元是由具有密闭结构的外胆舱结构和内胆舱结构同轴设置组合而成,因而能够抵御更大的冲击压力。(The invention discloses a constant-volume heat-insulation combustion chamber device and a method, wherein the constant-volume heat-insulation combustion chamber device comprises a box body, an experiment chamber unit, a heating unit, a measuring unit and an electric control unit; the experiment cabin unit is arranged in the box body and comprises an outer liner cabin structure and an inner liner cabin structure which are coaxially arranged, and the outer liner cabin structure and the inner liner cabin structure are both closed structures; the heating unit is arranged in the inner container cabin structure; the measuring unit is connected with the experiment cabin unit; the electric control unit is connected with the measuring unit and the heating unit, controls the working state of the heating unit, and controls the measuring unit to measure the object to be measured in the inner container cabin structure according to the preset requirement. The experiment chamber unit is formed by coaxially arranging and combining an outer container chamber structure with a closed structure and an inner container chamber structure, so that higher impact pressure can be resisted.)

1. A constant volume adiabatic fire bin device, comprising:

a box body;

the experiment cabin unit is arranged in the box body and comprises an outer liner cabin structure and an inner liner cabin structure which are coaxially arranged, and the outer liner cabin structure and the inner liner cabin structure are both closed structures;

the heating unit is arranged in the inner container cabin structure;

the measuring unit is connected with the inner container cabin structure;

and the electric control unit is connected with the measuring unit and the heating unit, controls the working state of the heating unit, and controls the measuring unit to measure the object to be measured in the inner container cabin structure according to the preset requirement.

2. The constant-volume heat-insulation combustion bin device according to claim 1, wherein the outer container cabin structure comprises an outer container cabin door, an outer container barrel and an outer container rear end sealing head which are sequentially connected, and a first closed space is formed by the outer container cabin door, the outer container barrel and the outer container rear end sealing head;

the inner container cabin structure is located in the first closed space and comprises an inner container front end sealing head, a first inner container barrel, a second inner container barrel and an inner container rear end sealing head which are sequentially connected, and the first inner container front end sealing head, the first inner container barrel, the second inner container barrel and the inner container rear end sealing head jointly form a second closed space.

3. The constant-volume heat-insulation combustion chamber device as claimed in claim 2, wherein the heating unit is a heating rod which penetrates through the inside of the first inner container cylinder and the second inner container cylinder to connect the first inner container cylinder and the second inner container cylinder; and/or the heating rod is also arranged at the inner side of the front end sealing head of the inner container and/or the rear end sealing head of the inner container.

4. A constant volume adiabatic fire bin apparatus according to claim 3, wherein: the length-diameter ratio of the experiment cabin unit is 1: 1, the inner diameter is 450-550mm, and the axial length is 450-550 mm.

5. A constant volume adiabatic fire bin apparatus according to claim 2, wherein: a first cabin door flange, a cabin door flange gasket and a second cabin door flange are sequentially arranged on one side, close to the cabin door of the outer container, of the outer container barrel; the outer container cylinder is hinged with the second cabin door flange.

6. A constant volume adiabatic fire bin apparatus according to claim 2, wherein: and an outer liner rear end flange gasket and an outer liner rear end flange cover plate are sequentially arranged on one side of the outer liner rear end sealing head, which is far away from the outer liner barrel.

7. A constant volume adiabatic fire bin apparatus according to claim 2, wherein: the outer container cabin structure is connected with the inner container cabin structure through a support, and heat insulation cotton is filled in a gap between the outer container cabin structure and the inner container cabin structure.

8. The constant-volume heat-insulation combustion bin device according to claim 2, wherein a first through hole, a second through hole, a third through hole and a fourth through hole are formed in the outer container barrel and at corresponding positions on the first inner container barrel or the second inner container barrel; the measuring unit comprises a temperature sensor, a first vacuum cut-off electromagnetic valve, an air cut-off electromagnetic valve, a sampling valve, a second vacuum cut-off electromagnetic valve, a vacuum air pump, a nitrogen bottle, an air compressor and measuring equipment; the temperature sensor is arranged in the inner container cabin structure; the first through hole is connected to a vacuum pump through an air pipe and a first vacuum cut-off electromagnetic valve; the second through hole is connected to the nitrogen gas cylinder through an air pipe and an air cut-off electromagnetic valve; the third through hole vent pipe and the sampling valve are connected to a measuring device; the fourth through hole is connected to the air compressor through an air pipe and a second vacuum cutting electromagnetic valve; the first vacuum cut-off electromagnetic valve, the gas cut-off electromagnetic valve, the sampling valve, the second vacuum cut-off electromagnetic valve and the temperature sensor are all connected with the electrical control unit.

9. A constant volume adiabatic fire bin apparatus according to claim 1, wherein: the box includes the safety cover front end hatch door, safety cover and the safety cover rear end hatch door that link to each other in order, the safety cover is located the outside of experiment cabin unit.

10. A use method of the constant-volume heat-insulation combustion chamber device based on any one of claims 1-9, characterized by comprising the following steps:

placing an article for experiment in the inner container cabin structure;

locking the inner container cabin structure and the outer container cabin structure;

starting the heating unit by using the electric control unit, and stopping the heating unit until the temperature inside the inner container cabin structure reaches a preset requirement;

and starting the measuring unit by using the electric control unit, and controlling the measuring unit to acquire and store experimental data according to preset requirements.

Technical Field

The invention belongs to the technical field of analytical instruments, and particularly relates to a constant-volume heat-insulation combustion chamber device and a constant-volume heat-insulation combustion chamber method.

Background

Adiabatic calorimetry is used to evaluate the stability and potential hazard of chemical process and dangerous chemicals. To simulate the self-accelerated reaction of a sample in a severe (runaway, etc.) situation, adiabatic calorimetry uses adiabatic kinetics to analyze the reaction data and a large number of thermodynamic factors, such as: the data of activation energy, reaction order, frequency factor, adiabatic temperature rise, reaction heat and the like provide necessary theoretical basis for the safety/hazard evaluation of production, use, storage and transportation of chemicals and dangerous goods, and the information has very important significance for researching and evaluating the technological process, ensuring safe operation and preventing thermal runaway effect which can cause destructive results.

At present, some effective experimental devices can be used for simulating thermal runaway scene distortion of a power lithium battery, for example: the device comprises an acceleration calorimeter, an adiabatic reaction heat energy tester, a cone calorimeter and the like, and can be used for researching heat production, air injection and combustion characteristics of the power lithium battery in the thermal runaway process. The cone calorimeter is used for igniting samples by using external flame, and measuring the heat release quantity and heat release power of the combustion of the samples based on an oxygen consumption method (OC), but in an actual scene, the thermal runaway combustion of the samples is usually caused by that 1 or more samples generate thermal runaway under abuse conditions to further cause the whole thermal runaway, the combustion process is not like the ignition of the external flame of the cone calorimeter, and the cone calorimeter can only carry out a combustion heating experiment on sample monomers generally; the adiabatic reaction thermal energy determinator heats a sample in a sealed cavity to thermal runaway and then measures the thermal runaway of the sample, but the thermal runaway cannot directly measure the heat in the process. And the adiabatic reaction thermal energy determinator heats the sample in a closed space to induce thermal runaway, and the thermal runaway is greatly different from the actual scene of the thermal runaway of the sample. The acceleration calorimeter (ARC) is designed based on the adiabatic principle, can use larger sample amount, has high sensitivity, can accurately measure the initial temperature of sample thermal decomposition and the change curve of temperature and pressure along with time in the process of the adiabatic decomposition, but has similar defects with the adiabatic reaction thermal energy determinator, namely, the sample is heated in a sealed cavity to thermal runaway, and then the thermal runaway of the sample is measured, so that the heat in the process cannot be directly measured, and the difference of the actual scene of the thermal runaway of the sample is larger. Because the tested sample is mainly milligram equivalent, the requirement on a sample cell is low, such as German relaxation-resistant and Hangzhou tilt instruments, and the sample cell can not bear larger samples such as a battery cell, so that the sample cell can not meet the requirement of a lithium battery cell; and great holding space that holds of british THT, the biggest product model has 50L's volume, so can be used for detecting the thermal runaway of lithium cell electricity core product, but along with the change that lithium cell trade development is crescent and new, also suitable for the test of lithium cell module to come up, this moment british THT's product can't satisfy this test demand.

For most of materials with high explosiveness, such as high-capacity lithium battery cores, lithium battery modules or high-risk energetic materials, after thermal runaway, large explosion pressure and explosion shock waves are generated, the original heat insulation calorimeter is manufactured by adopting a sheet metal shell, and for a battery cell product with the capacity of 100 ampere-hour storage batteries, the battery cell product cannot bear the pressure shock of the product after thermal control, and even can cause safety accidents of testing.

Disclosure of Invention

In order to solve the problems, the invention provides a constant-volume heat-insulation combustion chamber device and a constant-volume heat-insulation combustion chamber method.

In order to achieve the technical purpose and achieve the technical effects, the invention is realized by the following technical scheme:

in a first aspect, the present invention provides a constant volume, adiabatic fire chamber apparatus, comprising:

a box body;

the experiment cabin unit is arranged in the box body and comprises an outer liner cabin structure and an inner liner cabin structure which are coaxially arranged, and the outer liner cabin structure and the inner liner cabin structure are both closed structures;

the heating unit is arranged in the inner container cabin structure;

the measuring unit is connected with the inner container cabin structure;

and the electric control unit is connected with the measuring unit and the heating unit, controls the working state of the heating unit, and controls the measuring unit to measure the object to be measured in the inner container cabin structure according to the preset requirement.

Optionally, the outer liner cabin structure comprises an outer liner cabin door, an outer liner cylinder and an outer liner rear end sealing head which are sequentially connected, and a first closed space is formed by the outer liner cabin door, the outer liner cylinder and the outer liner rear end sealing head;

the inner container cabin structure is located in the first closed space and comprises an inner container front end sealing head, a first inner container barrel, a second inner container barrel and an inner container rear end sealing head which are sequentially connected, and the first inner container front end sealing head, the first inner container barrel, the second inner container barrel and the inner container rear end sealing head jointly form a second closed space.

Optionally, the heating unit is a heating rod, and the heating rod penetrates through the first liner cylinder and the second liner cylinder to connect the first liner cylinder and the second liner cylinder;

and/or the heating rod is also arranged at the inner side of the front end sealing head of the inner container and/or the rear end sealing head of the inner container.

Optionally, the experiment cabin unit has a length-diameter ratio of 1: 1, the inner diameter is 450-550mm, and the axial length is 450-550 mm.

Optionally, a first door flange, a door flange gasket and a second door flange are sequentially arranged on one side of the outer container barrel body close to the outer container door; the outer container cylinder is hinged with the second cabin door flange.

Optionally, an outer liner rear end flange gasket and an outer liner rear end flange cover plate are sequentially arranged on one side, far away from the outer liner barrel, of the outer liner rear end sealing head.

Optionally, the outer container cabin structure and the inner container cabin structure are connected through a support, and a gap between the outer container cabin structure and the inner container cabin structure is filled with heat insulation cotton.

Optionally, a first through hole, a second through hole, a third through hole and a fourth through hole are respectively arranged at corresponding positions on the outer container cylinder and the first inner container cylinder or the second inner container cylinder; the measuring unit comprises a temperature sensor, a first vacuum cut-off electromagnetic valve, an air cut-off electromagnetic valve, a sampling valve, a second vacuum cut-off electromagnetic valve, a vacuum air pump, a nitrogen bottle, an air compressor and measuring equipment; the temperature sensor is arranged in the inner container cabin structure; the first through hole is connected to a vacuum pump through an air pipe and a first vacuum cut-off electromagnetic valve; the second through hole is connected to the nitrogen gas cylinder through an air pipe and an air cut-off electromagnetic valve; the third through hole vent pipe and the sampling valve are connected to a measuring device; the fourth through hole is connected to the air compressor through an air pipe and a second vacuum cutting electromagnetic valve; the first vacuum cut-off electromagnetic valve, the gas cut-off electromagnetic valve, the sampling valve, the second vacuum cut-off electromagnetic valve and the temperature sensor are all connected with the electrical control unit.

Optionally, the box body comprises a protective cover front-end cabin door, a protective cover and a protective cover rear-end cabin door which are connected in sequence, and the protective cover is arranged on the outer side of the experiment cabin unit.

In a second aspect, a method for using the constant-volume adiabatic fire bin device based on any one of the first aspect comprises the following steps:

placing an article for experiment in the inner container cabin structure;

locking the inner container cabin structure and the outer container cabin structure;

starting the heating unit by using the electric control unit, and stopping the heating unit until the temperature inside the inner container cabin structure reaches a preset requirement;

and starting the measuring unit by using the electric control unit, and controlling the measuring unit to acquire and store experimental data according to preset requirements.

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

the experiment chamber unit is formed by coaxially arranging an outer container chamber structure and an inner container chamber structure with a closed structure, so that the experiment chamber unit can resist larger pressure impact. In addition, the outer container cabin structure and the inner container cabin structure in the experiment cabin unit are designed to be large in size, so that the experiment cabin unit has a larger measurement volume, namely a larger measurement pool can be provided.

Drawings

In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which:

FIG. 1 is an overall structure diagram of a constant volume and heat insulation combustion chamber device according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of an explosive structure of a constant volume adiabatic fire chamber device according to an embodiment of the present invention;

FIG. 3 is a structural layout of the inner container compartment according to an embodiment of the present invention;

wherein:

1. a heating unit; 2. a temperature sensor; 3. the front end of the inner container is sealed; 4. fixing the bolt; 5. a first liner cylinder; 6. a second liner cylinder; 7. sealing the rear end of the inner container; 8. a front end hatch door of the protective cover; 9. a protective cover; 10. a protective cover rear end hatch; 11. an outer container cabin door; 12. a first hatch door flange; 13. a second door flange; 14. an outer liner cylinder; 15. sealing the rear end of the outer container; 16. a flange gasket at the rear end of the outer liner; 17. a flange cover plate at the rear end of the outer liner; 18. a first hatch door flange gasket; 19. hinge of outer container door, 20-quick-opening bolt.

Detailed Description

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously positioned and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The following detailed description of the principles of the invention is provided in connection with the accompanying drawings.

Example 1

The embodiment of the invention provides a constant-volume heat-insulation combustion chamber device, which comprises the following components in percentage by weight as shown in figures 1-3:

a box body;

the experiment cabin unit is arranged in the box body and comprises an outer liner cabin structure and an inner liner cabin structure which are coaxially arranged, and the outer liner cabin structure and the inner liner cabin structure are both closed structures;

the heating unit 1 is arranged in the inner container cabin structure;

the measuring unit is connected with the inner container cabin structure;

and the electric control unit (not shown in the figure) is connected with the measuring unit and the heating unit 1, controls the working state of the heating unit 1, and controls the measuring unit to measure the object to be measured in the inner container cabin structure according to the preset requirement.

According to experimental determination, the protection grade of the constant-volume heat-insulation combustion chamber device in the embodiment of the invention is that the maximum bearable pressure is 1.7MPa, the constant bearable pressure is not lower than 1.4MPa, the tightness test is carried out under the pressure of 1.4MPa, and the air leakage is not more than 1% in 24 hours.

In a specific embodiment of the invention, as shown in fig. 1 and 2, the housing comprises a front boot door 8, a boot 9 and a rear boot door 10 connected in series, the boot 9 enclosing the outside of the test chamber unit. The material of the box body can be selected from stainless steel bodies, such as 304 stainless steel. In order to achieve a good heat insulation effect, aluminum silicate heat insulation cotton is arranged between the protective cover 9 and the outer container cabin structure, and the minimum thickness of the aluminum silicate heat insulation cotton is not less than 50 mm.

As shown in fig. 1-2, in a specific implementation manner of the embodiment of the present invention, the outer liner cabin structure includes an outer liner cabin door 11, an outer liner cylinder 14, and an outer liner rear end sealing head 15, which are connected in sequence, and together form a first enclosed space; in the practical application process, a first cabin door flange 12, a first cabin door flange gasket 18 and a second cabin door flange 13 are sequentially arranged on one side, close to the outer container cabin door 11, of the outer container barrel 14, and the first cabin door flange 12, the first cabin door flange gasket 18 and the second cabin door flange 13 are all connected with the outer container barrel 14 through quick-opening bolts 20; the outer container barrel 14 is hinged with the second cabin door flange 13 through an outer container cabin door hinge 19; and an outer liner rear end flange gasket 16 and an outer liner rear end flange cover plate 17 are sequentially arranged on one side of the outer liner rear end sealing head 15, which is far away from the outer liner cylinder body 14.

As shown in fig. 1-2, in a specific implementation manner of the embodiment of the present invention, the liner cabin structure is located in the first enclosed space, and includes a liner front end sealing head 3, a first liner cylinder 5, a second liner cylinder 6, and a liner rear end sealing head 7, which are connected in sequence, and the four are connected by a fixing bolt 4 to form a second enclosed space together; the heating unit 1 is a heating rod which penetrates through the first inner container cylinder 5 and the second inner container cylinder 6 to connect the first inner container cylinder and the second inner container cylinder; further, the heating rod is also arranged on the inner side of the front end sealing head 3 and/or the rear end sealing head 7 of the inner container; in the actual material selection process, the inner container cabin structure can be made of cast aluminum materials, so that the overall pressure resistance of the device is improved, and the device bears higher pressure.

In the practical application process, the inner container cabin structure is connected with the outer container cabin structure through a support (not shown in the figure), and the support with a high-temperature resistant function is required to be selected; the heat insulation cotton is filled in a gap between the outer container cabin structure and the inner container cabin structure, the heat insulation cotton can be aluminum silicate heat insulation cotton (stable without ablation and degradation for a long time below 800 ℃), the thickness of the high-temperature heat insulation cotton is not less than 100mm, and the heat insulation performance of the inner container cabin structure can be improved.

In a specific implementation manner of the embodiment of the present invention, the temperature sensor 2 may be a thermocouple, the thermocouple is embedded in the first inner container barrel 5 and/or the second inner container barrel, and during a specific implementation process, the thermocouple may be further embedded in the inner container front end sealing head 3, the inner container bottom, and the inner surface of the inner container rear end sealing head 7.

In the embodiment of the invention, the length-diameter ratio of the experiment cabin unit is 1: 1, the inner diameter is 450-550mm, preferably 500 mm; the axial length is 450 mm, preferably 500mm, and the volume is about 82L, thereby greatly improving the measurement volume.

In a specific implementation manner of the embodiment of the present invention, the outer liner cylinder 14 and the first inner liner cylinder 5 or the second inner liner cylinder 6 are respectively provided with a first through hole, a second through hole, a third through hole and a fourth through hole at corresponding positions; the measuring unit comprises a temperature sensor, a first vacuum cut-off electromagnetic valve, an air cut-off electromagnetic valve, a sampling valve, a second vacuum cut-off electromagnetic valve, a vacuum air pump, a nitrogen bottle, an air compressor and measuring equipment; the temperature sensor is arranged in the second closed space and used for monitoring the temperature value in the second closed space; the first through hole is connected to a vacuum pump through an air pipe and a first vacuum cut-off electromagnetic valve; the second through hole is connected to the nitrogen gas cylinder through an air pipe and an air cut-off electromagnetic valve; the third through hole vent pipe and the sampling valve are connected to a measuring device; the fourth through hole is connected to the air compressor through an air pipe and a second vacuum cutting electromagnetic valve; the first vacuum cut-off electromagnetic valve, the gas cut-off electromagnetic valve, the sampling valve, the second vacuum cut-off electromagnetic valve and the temperature sensor are all connected with the electrical control unit. Further, the measuring unit further comprises a vacuum pressure gauge, the vacuum pressure gauge is arranged in the inner container cabin structure and connected with the electric control unit for monitoring the pressure value in the inner container cabin structure in real time, and the electric control unit controls the starting and stopping states of the first vacuum cut-off electromagnetic valve based on the vacuum pressure gauge.

In summary, when thermal analysis of solid or liquid chemicals is required, the following steps can be adopted based on the constant-volume adiabatic combustion chamber device in the embodiment of the invention:

checking the state of the constant-volume heat-insulation combustion chamber device, and placing an article for experiment in the inner container cabin structure;

locking the inner container cabin structure and the outer container cabin structure;

starting a first vacuum cut-off electromagnetic valve by using an electric control unit, and vacuumizing the inner container cabin structure by using a vacuum pump;

an electric control unit is utilized to start a gas-cutting electromagnetic valve, and a nitrogen bottle is used for filling nitrogen into the inner container cabin structure;

starting a heating unit by using an electric control unit, heating an object to be measured in the liner cabin structure, starting a sampling valve in the heating process, sampling gas in the liner cabin structure, transmitting the gas to a measuring device, and analyzing the gas obtained by sampling by the measuring device;

measuring and storing the real-time temperature in the liner cabin structure by using a temperature sensor, and turning off the electric heating unit to stop heating when the real-time temperature in the liner cabin structure reaches a preset value;

after the test is finished, the electric control unit is utilized to start the first vacuum cut-off electromagnetic valve, the inner container cabin structure is cleaned by air, and all original test gas in the inner container cabin structure is cleaned.

And (4) checking all equipment and devices in the device, replacing the devices with bad devices, cleaning and collecting attachments, closing the inner container cabin structure and the outer container cabin structure, turning off a power supply, and ending the experiment.

The constant-volume heat-insulation combustion chamber device in the embodiment of the invention is an instrument for evaluating the stability and potential hazards of chemical process and dangerous chemicals, simulates the self-acceleration reaction of a sample under the serious conditions of (out of control and the like), can be used for carrying out thermal analysis on solid or liquid chemicals, evaluating (mixing) potential hazards of gas, gas/liquid, liquid/liquid, gas/solid, liquid/solid mixed systems and continuous liquid/gas charging reaction systems, and can provide more accurate and comprehensive thermodynamic and kinetic data. The experimental objects of the constant-volume heat-insulation combustion chamber device in the embodiment of the invention can comprise organic chemicals, petrochemical products, medicines, soil chemicals, fine organic chemicals, batteries, macromolecules and high-energy explosive materials, can be used for carrying out thermal safety analysis and the like of pyrotechnic compositions, and the data obtained by the experiment can provide a necessary theoretical basis for production, use, storage and transportation safety/hazard evaluation of the chemicals and dangerous articles, solve the problem that the existing test equipment cannot restore the in-situ state measurement data of the sample, and provide help for battery thermal runaway research of battery production enterprises, automobile production enterprises and scientific research institutions.

Example 2

An embodiment of the present invention provides a method for using a constant volume adiabatic fire chamber device according to any one of embodiment 1, including the following steps:

placing an article for experiment in the inner container cabin structure;

locking the inner container cabin structure and the outer container cabin structure;

starting the heating unit 1 by using an electric control unit, and stopping the heating unit until the temperature inside the inner container cabin structure reaches a preset requirement;

and starting the measuring unit by using the electric control unit, and controlling the measuring unit to acquire and store experimental data according to preset requirements.

As shown in fig. 1-2, in a specific implementation manner of the embodiment of the present invention, the outer liner cabin structure includes an outer liner cabin door 11, an outer liner cylinder 14, and an outer liner rear end sealing head 15, which are connected in sequence, and together form a first enclosed space; in the practical application process, a first cabin door flange 12, a first cabin door flange gasket 18 and a second cabin door flange 13 are sequentially arranged on one side, close to the outer container cabin door 11, of the outer container barrel 14, and the first cabin door flange 12, the first cabin door flange gasket 18 and the second cabin door flange 13 are all connected with the outer container barrel 14 through quick-opening bolts 20; the outer container barrel 14 is hinged with the second cabin door flange 13 through an outer container cabin door hinge 19; and an outer liner rear end flange gasket 16 and an outer liner rear end flange cover plate 17 are sequentially arranged on one side of the outer liner rear end sealing head 15, which is far away from the outer liner cylinder body 14.

As shown in fig. 1-2, in a specific implementation manner of the embodiment of the present invention, the liner cabin structure is located in the first enclosed space, and includes a liner front end sealing head 3, a first liner cylinder 5, a second liner cylinder 6, and a liner rear end sealing head 7, which are connected in sequence, and the four are connected by a fixing bolt 4 to form a second enclosed space together; the heating unit 1 is a heating rod which penetrates through the first inner container cylinder 5 and the second inner container cylinder 6 to connect the first inner container cylinder and the second inner container cylinder; further, the heating rod is also arranged on the inner side of the front end sealing head 3 and/or the rear end sealing head 7 of the inner container; in the actual material selection process, the inner container cabin structure can be made of cast aluminum materials, so that the overall pressure resistance of the device is improved, and the device bears higher pressure.

The outer container barrel 14 and the first inner container barrel 5 or the second inner container barrel 6 are respectively provided with a first through hole, a second through hole, a third through hole and a fourth through hole at corresponding positions; the measuring unit comprises a temperature sensor, a first vacuum cut-off electromagnetic valve, an air cut-off electromagnetic valve, a sampling valve, a second vacuum cut-off electromagnetic valve, a vacuum air pump, a nitrogen bottle, an air compressor and measuring equipment; the temperature sensor is arranged in the second closed space and used for monitoring the temperature value in the second closed space; the first through hole is connected to a vacuum pump through an air pipe and a first vacuum cut-off electromagnetic valve; the second through hole is connected to the nitrogen gas cylinder through an air pipe and an air cut-off electromagnetic valve; the third through hole vent pipe and the sampling valve are connected to a measuring device; the fourth through hole is connected to the air compressor through an air pipe and a second vacuum cutting electromagnetic valve; the first vacuum cut-off electromagnetic valve, the gas cut-off electromagnetic valve, the sampling valve, the second vacuum cut-off electromagnetic valve and the temperature sensor are all connected with the electrical control unit. Further, the measuring unit further comprises a vacuum pressure gauge, the vacuum pressure gauge is arranged in the inner container cabin structure and connected with the electric control unit for monitoring the pressure value in the inner container cabin structure in real time, and the electric control unit controls the starting and stopping states of the first vacuum cut-off electromagnetic valve based on the vacuum pressure gauge.

Based on the specific structure, the use method of the constant-volume heat-insulation combustion chamber device specifically comprises the following steps:

checking the state of the constant-volume heat-insulation combustion chamber device, and placing an article for experiment in the inner container cabin structure;

locking the inner container cabin structure and the outer container cabin structure;

starting a first vacuum cut-off electromagnetic valve by using an electric control unit, and vacuumizing the inner container cabin structure by using a vacuum pump;

an electric control unit is utilized to start a gas-cutting electromagnetic valve, and a nitrogen bottle is used for filling nitrogen into the inner container cabin structure;

starting a heating unit by using an electric control unit, heating an object to be measured in the liner cabin structure, starting a sampling valve in the heating process, sampling gas in the liner cabin structure, transmitting the gas to a measuring device, and analyzing the gas obtained by sampling by the measuring device;

measuring and storing the real-time temperature in the liner cabin structure by using a temperature sensor, and turning off the electric heating unit to stop heating when the real-time temperature in the liner cabin structure reaches a preset value;

after the test is finished, the electric control unit is utilized to start the first vacuum cut-off electromagnetic valve, the inner container cabin structure is cleaned by air, and all original test gas in the inner container cabin structure is cleaned.

And (4) checking all equipment and devices in the device, replacing the devices with bad devices, cleaning and collecting attachments, closing the inner container cabin structure and the outer container cabin structure, turning off a power supply, and ending the experiment.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.