CN112083026A - Spontaneous combustion test device - Google Patents
Spontaneous combustion test device Download PDFInfo
- Publication number
- CN112083026A CN112083026A CN202010237801.5A CN202010237801A CN112083026A CN 112083026 A CN112083026 A CN 112083026A CN 202010237801 A CN202010237801 A CN 202010237801A CN 112083026 A CN112083026 A CN 112083026A
- Authority
- CN
- China
- Prior art keywords
- gas
- sample
- flow rate
- introduction
- flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 33
- 230000002269 spontaneous effect Effects 0.000 title claims abstract description 33
- 238000005286 illumination Methods 0.000 claims abstract description 41
- 239000007789 gas Substances 0.000 claims description 119
- 238000006243 chemical reaction Methods 0.000 claims description 23
- 239000012495 reaction gas Substances 0.000 claims description 19
- 230000002401 inhibitory effect Effects 0.000 claims description 16
- 238000007254 oxidation reaction Methods 0.000 claims description 12
- 230000000903 blocking effect Effects 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 230000001678 irradiating effect Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 4
- 229910001873 dinitrogen Inorganic materials 0.000 description 4
- 229910001882 dioxygen Inorganic materials 0.000 description 4
- 239000011261 inert gas Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/02—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering
- G01N25/12—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering of critical point; of other phase change
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/12—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using combustion
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Combustion & Propulsion (AREA)
- Molecular Biology (AREA)
- Engineering & Computer Science (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention relates to a spontaneous combustion test device. The introduction pipe, the flowmeter, and the illumination unit are housed in the case. Gas is introduced into the internal space of the main body containing the sample by the introduction tube. The flow rate of the gas flowing in the inlet pipe is indicated according to the height of the floating ball in the conical pipe of the flow meter. Light is irradiated to the flowmeter from an illumination unit disposed so as to face the front surface of the case through the flowmeter. The flow meter can be visually recognized from the outside through the front face of the case portion.
Description
Technical Field
The invention relates to a spontaneous combustion test device.
Background
The autoignition test apparatus is an apparatus that measures the conditions of temperature or time at which a sample reaches autoignition. For example, in the spontaneous combustion test apparatus described in japanese patent No. 3632299, a sample to be measured is housed in the apparatus main body, and an inert gas is supplied into the apparatus main body. In this state, the temperature control of the apparatus main body is started so that the sample temperature is maintained at a predetermined set temperature. This gradually increases the sample temperature from the initial value, and stabilizes the sample temperature when the set temperature is reached.
After the temperature of the sample is stabilized, oxygen gas is supplied into the apparatus main body instead of the inert gas. In this case, the temperature of the sample rises due to oxidation of the sample, and when the temperature of the sample reaches an unknown ignition point, the sample starts to spontaneously ignite. Here, the time from the point when the sample temperature is stable to the point when the sample starts to spontaneously ignite is measured.
Disclosure of Invention
In the spontaneous combustion test apparatus, a flow meter may be provided for adjusting the flow rate of the gas and for confirming the flow rate. In addition, the flow meter includes a tapered tube and a float ball. In the conical tube, the float is located at a height corresponding to the flow rate of the supplied gas. And prompting the flow rate of the supplied gas according to the position relation between the scales marked on the conical tube and the height of the floating ball.
However, in the gas flowmeter, the scale lines are small, and the diameter of the float ball is small, so that the flow rate to be presented cannot be easily read in some cases. Further, since the flow meter is not manufactured on the premise of being used in a state of being mounted inside the apparatus main body, it becomes more difficult to read the flow rate when the flow meter is mounted inside the apparatus main body.
The invention aims to provide a spontaneous combustion test device which can easily read the flow rate of gas presented by a flow meter.
One aspect of the present invention relates to a spontaneous combustion test apparatus for evaluating a condition under which a sample reaches spontaneous combustion, the spontaneous combustion test apparatus including: a main body having an internal space for storing a sample; an introduction pipe that introduces a gas into the internal space of the main body; a flow meter including a tapered tube and a float ball, for indicating a flow rate of the gas flowing in the introduction tube according to a height of the float ball in the tapered tube; a housing portion having a flow rate presentation surface, housing the introduction tube, and housing the flow meter so that the flow meter can be visually recognized through the flow rate presentation surface; and an illumination unit disposed opposite to the flow rate presenting surface with the flow rate meter interposed therebetween in the case, and configured to be capable of irradiating the flow rate meter with light.
Drawings
FIG. 1 is a schematic cross-sectional view of an autoignition test apparatus according to an embodiment of the present invention,
FIG. 2 is a block diagram showing a schematic structure of the gas supply section of FIG. 1,
FIG. 3 is a view showing a structure inside the case portion of FIG. 2,
fig. 4 is a side view of the housing portion of fig. 2.
Detailed Description
(1) Structure of spontaneous combustion test device
Hereinafter, an autoignition test apparatus according to an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a schematic cross-sectional view of an autoignition test apparatus according to an embodiment of the present invention. As shown in fig. 1, the spontaneous combustion test apparatus 100 includes a main body 10, a sample holder 20, a gas supply unit 30, an air bath temperature control unit 40, a flow regulating member 50, a sample chamber temperature control unit 60, and a control unit 70. In the following description, the direction in which gravity is directed is referred to as downward, and the opposite direction is referred to as upward.
The main body 10 is a case having a rectangular parallelepiped shape, for example, and is formed of stainless steel in the present embodiment. The side wall of the main body 10 is filled with a heat insulator 11. An air bath (thermostatic bath) 12 having an environment with a predetermined temperature range insulated from the outside is realized inside the main body 10. In this example, the upper limit of the temperature range is 300 ℃. As described later, the sample S to be measured is disposed substantially in the center of the inside of the body 10. Hereinafter, a space in a certain range around the sample S inside the body 10 is referred to as a sample chamber 13.
The sample holder 20 extends in the vertical direction, and holds a sample container 21 containing a sample S at a lower end portion. The sample container 21 is formed of, for example, glass, and has an opening for introducing various gases supplied from the supply unit 30. The sample holder 20 is fixed to the upper surface of the body 10 in a state of penetrating through the opening 14 formed in the upper surface of the body 10. Thus, the sample container 21 held at the lower end of the sample holder 20 is positioned at the substantially central portion (sample chamber 13) of the interior of the body 10.
The gas supply unit 30 includes a housing 31 disposed below the body 10, and selectively supplies a reaction inhibiting gas, a reaction gas, and a reaction stopping gas to the sample S stored in the sample container 21. Various pipes and valves are accommodated in the housing portion 31. The details of the gas supply unit 30 will be described later.
The reaction-inhibiting gas is an inert gas (nitrogen gas in this example), and inhibits the oxidation reaction of the sample S. The reaction gas is an oxygen concentration adjusting gas or air, and promotes the oxidation reaction of the sample S. The reaction-stopping gas is an inert gas (nitrogen gas in this example), and stops the oxidation reaction of the sample S. The gas supplied to the sample S is guided upward along the sample holder 20, passes through the opening 14 of the body 10, and is then discharged from a gas discharge port 22 formed in the sample holder 20.
The air bath temperature control unit 40 includes a heater 41, a temperature sensor 42, a fan 43, and a motor 44. The heater 41, the temperature sensor 42, and the fan 43 are disposed in the main body 10. The motor 44 is disposed below the main body 10. A rotary shaft 44a of the motor 44 is connected to the fan 43 through an opening 15 formed in the lower surface of the main body 10. The heater 41 is, for example, a heating wire, and adjusts the temperature of the air bath 12. The temperature sensor 42 is, for example, a platinum temperature measuring resistor, and detects the temperature of the air bath 12. The fan 43 rotates to stir the atmosphere of the air bath 12. The motor 44 drives the fan 43 to rotate.
The flow straightening member 50 is a member having a bottomed cylindrical shape formed of a material having a small heat capacity such as stainless steel. The rectifying member 50 is fixed to the lower surface of the main body 10 by point contact while surrounding the sample chamber 13, and introduces an atmosphere stirred by the air bath temperature-regulating unit 40 from the upper portion into the interior (see the thick arrow in fig. 1). An opening having a diameter of, for example, 45mm is formed in a portion of the bottom wall of the flow straightening member 50 located above the fan 43. Air is supplied to the central portion of the fan 43 through the opening.
The sample chamber temperature adjusting unit 60 includes a heater 61 and temperature sensors 62 and 63. The heater 61 is, for example, a heating wire, and is attached in a state of being wound so as to surround the periphery of the sample container 21. In this example, the space surrounded by the heater 61 is divided into the sample chamber 13. The temperature sensors 62, 63 are, for example, sheath thermocouples. The temperature sensor 62 is provided inside the sample container 21 and detects the temperature of the sample S stored in the sample container 21. The temperature sensor 63 is provided in the sample chamber 13 and detects the temperature of the sample chamber 13.
The control unit 70 includes a gas control unit 71, an air bath control unit 72, a sample chamber control unit 73, and a measurement unit 74. The gas controller 71 controls the gas supplier 30 to selectively supply the reaction-inhibiting gas, the reaction gas, and the reaction-stopping gas by switching the on/off valve 34 (see fig. 2 described later) of the gas supplier 30.
The air bath control unit 72 receives a set temperature input by the user. The air bath control unit 72 controls the heater 41 so that the temperature of the air bath 12 detected by the temperature sensor 42 matches the set temperature described above. The sample chamber control section 73 controls the heater 61 so that the temperature of the sample chamber 13 detected by the temperature sensor 63 matches the temperature of the sample S detected by the temperature sensor 62. The measuring section 74 measures the time until the sample S starts self-ignition. Details of the gas control unit 71 and the measurement unit 74 will be described later.
(2) Gas supply unit
Fig. 2 is a block diagram showing a schematic configuration of the gas supply unit 30 of fig. 1. Fig. 3 is a diagram showing the structure inside the housing 31 of the gas supply unit 30 of fig. 1. Fig. 4 is a side view of the housing 31 of the gas supply unit 30 of fig. 1. As shown in fig. 2, the gas supply unit 30 includes a plurality of sets (3 sets in this example) of an introduction unit 32, an introduction pipe 33, an opening/closing valve 34, a control valve 35, a flow meter 36, and an illumination unit 37. The gas supply unit 30 further includes a junction pipe 38 and a supply pipe 39.
The plurality of sets of introduction portions 32, introduction pipes 33, opening/closing valves 34, control valves 35, flow meters 36, and illumination portions 37 correspond to the reaction-inhibiting gas, the reaction gas, and the reaction-stopping gas, respectively. In fig. 3, only the introduction section 32, the introduction pipe 33, the opening/closing valve 34, the control valve 35, the flow meter 36, and the illumination section 37 corresponding to the reaction stop gas are shown. The introduction portion 32, the introduction pipe 33, the opening/closing valve 34, the control valve 35, the flow meter 36, and the illumination portion 37 corresponding to the reaction-inhibiting gas and the reaction gas, respectively, are positioned in the back direction of the paper.
Each of the introduction portions 32 is attached to 1 side surface (hereinafter referred to as a back surface 31B) of the case portion 31 (see fig. 3). Outside the housing portion 31, pipes or hoses leading from a gas source, not shown, for supplying gas can be connected to the respective introduction portions 32. Each of the introduction portions 32 is connected to a gas source that supplies a corresponding gas, so that the gas corresponding to each of the introduction portions 32 is introduced.
Inside the housing 31, each introduction portion 32 is connected to a corresponding introduction pipe 33. The gas introduced into each introduction portion 32 flows through the corresponding introduction pipe 33. In the following description, the direction of the gas flow in each introduction pipe 33 is referred to as downstream, and the opposite direction is referred to as upstream. Further, each introduction pipe 33 may be configured by connecting a plurality of pipes.
The opening/closing valve 34, the regulating valve 35, and the flow meter 36 are inserted into each introduction pipe 33 from upstream to downstream. Each opening/closing valve 34 is, for example, an electromagnetic valve, and is opened/closed under the control of the gas control unit 71 in fig. 1. When each of the on-off valves 34 is in an open state, the gas flows through the corresponding introduction pipe 33. When each of the on-off valves 34 is in the closed state, the flow of the gas in the corresponding introduction pipe 33 is shut off.
Each of the adjustment valves 35 is, for example, a manual needle valve, and has an adjustment operation portion 35a (see fig. 3). Each of the adjustment operation portions 35a is exposed from 1 side surface (in this example, the front surface 31A opposite to the rear surface 31B) of the case portion 31 (see fig. 4). The user can adjust the flow rate of the gas flowing through the introduction pipe 33 corresponding to the adjustment valve 35 by operating the adjustment operation portion 35a of the desired adjustment valve 35.
Each flow meter 36 is provided in the case 31 so as to be visually recognized from 1 side surface of the case 31. In this example, a plurality of window portions 31A corresponding to the plurality of flowmeters 36 are provided on the front surface 31A of the housing portion 31. The flow meters 36 are visually recognized from the front surface 31A of the case 31 through the corresponding window portions 31A, and the corresponding adjustment operation portions 35a are arranged in the vertical direction (see fig. 4). The front surface 31A is an example of a flow rate indication surface.
Each flow meter 36 includes a tapered tube 36a and a float ball 36 b. Each tapered tube 36a has a rod-like outer shape extending in the vertical direction, and the inner peripheral portion of each tapered tube 36a has a conical shape. The area of the upper surface of the inner peripheral portion of each tapered tube 36a is larger than the area of the lower surface. The gas can pass upward from below in each tapered tube 36 a.
Each float ball 36b is disposed within a corresponding tapered tube 36 a. When the gas does not pass through each conical tube 36a, the corresponding floating ball 36b is located at the lower portion of the conical tube 36 a. When the gas passes through each tapered tube 36a, the corresponding float ball 36b rises to a height corresponding to the flow rate of the gas passing therethrough. The flow rate of the gas passing through is indicated based on the positional relationship between the scale marked on each tapered tube 36a and the height of the corresponding float ball 36 b.
Each illumination unit 37 has a structure in which a plurality of light sources (for example, light emitting diodes) are mounted on a circuit board, and is disposed on the back surface of the corresponding flowmeter 36. The back surface of the flow meter 36 is a surface opposite to a surface (a surface on which the scale of the tapered pipe 36a can be visually recognized) on which the flow rate of the flow meter 36 is indicated. Each illumination unit 37 emits light when the corresponding on-off valve 34 is in the open state, based on the control of the gas control unit 71 in fig. 1.
In this case, the flowmeter 36 is illuminated, and therefore the scale lines of the tapered tube 36a and the position of the float ball 36b can be clearly visually recognized. Thus, even when the scale line of the scale is small and the diameter of the float ball 36b is small, the user can easily read the indicated flow rate. Further, since each illumination unit 37 emits light in conjunction with the open/close state of the corresponding on/off valve 34, the type of gas supplied can be easily identified by identifying the flow meter 36 that is lit.
In the present embodiment, the holding member 1 is provided in the housing 31 (see fig. 4). The holding member 1 is formed of, for example, sponge, and has a plurality of thinned portions 2 that overlap with the plurality of window portions 31a, respectively. Each flowmeter 36 and the corresponding illumination unit 37 are disposed in the corresponding thinning unit 2 of the holding member 1. The portion between the adjacent thinned portions 2 of the holding member 1 serves as the light shielding portion 3.
With this configuration, even when the illumination unit 37 corresponding to any one of the flowmeters 36 emits light, the light can be blocked by the light blocking unit 3, and therefore the light does not reach the other flowmeters 36. Therefore, even when a plurality of flowmeters 36 are arranged close to each other, it is possible to prevent each flowmeter 36 from being illuminated by an illumination unit 37 that does not correspond to the flowmeter. Therefore, the user can more reliably recognize the type of the introduced gas.
The junction pipe 38 is connected to the downstream ends of the plurality of introduction pipes 33, and is connected to the upstream end of the supply pipe 39. Further, a downstream end portion of the supply pipe 39 is connected to the main body 10. The supply pipe 39 supplies the gas supplied from 1 or more introduction pipes 33 to the main body 10 via the junction pipe 38.
(3) Operation of the spontaneous Combustion test apparatus
The operation of the spontaneous combustion test apparatus 100 will be described with reference to fig. 1. First, the user stores the sample S to be measured in the sample container 21, and mounts the sample container 21 on the lower portion of the sample holder 20. Next, the user fixes the sample holder 20 to the upper surface of the body 10 in a state of being inserted into the opening 14 of the body 10. Thereby, the sample container 21 is disposed in the sample chamber 13.
Next, the user inputs the set temperature by operating the air bath control unit 72. When the set temperature is input, the air bath control unit 72 controls the heater 41 so that the temperature of the air bath 12 matches the set temperature. Further, the fan 43 rotates to stir the atmosphere of the air bath 12. The gas controller 71 controls the gas supplier 30 to supply the reaction suppressing gas at a flow rate adjusted by the user. In this case, the temperature of the sample S gradually rises from the initial value. The sample chamber controller 73 controls the sample chamber temperature controller 60 so that the temperature of the sample chamber 13 follows the temperature of the sample S.
The temperature of the sample S is stable when it reaches the set temperature. At this time, the measurement unit 74 starts time measurement. The gas controller 71 controls the gas supplier 30 to supply the reaction gas at a flow rate adjusted by the user instead of the reaction-inhibiting gas. This accelerates the oxidation reaction of the sample S, and the temperature of the sample S rises. The flow rate of the reaction gas is relatively small, for example, 2 to 5 mL/min. The sample chamber controller 73 controls the sample chamber temperature controller 60 so that the temperature of the sample chamber 13 follows the temperature of the sample S.
When the temperature of the sample S reaches the ignition point, the temperature of the sample S rises sharply. At this time, the measurement unit 74 ends the measurement of the time. The gas controller 71 controls the gas supplier 30 to supply the reaction-stopping gas at a flow rate adjusted by the user instead of the reaction gas. This stops the oxidation reaction of the sample S, thereby preventing spontaneous combustion. Further, the flow rate of the reaction stop gas is larger than the flow rate of the reaction suppressing gas. The time measured by the measuring section 74 is evaluated as a condition that the sample S reaches autoignition.
(4) Effect
In the spontaneous combustion test apparatus 100 of the present embodiment, the plurality of sets of the introduction pipe 33, the opening/closing valve 34, the adjustment valve 35, the flow meter 36, and the illumination unit 37 are housed in the housing portion 31. The gas is introduced into the internal space of the main body 10 in which the sample S is accommodated by the introduction pipes 33. The flow rate of the gas flowing through the corresponding introduction pipe 33 is presented based on the height of the float 36b in the tapered pipe 36a of each flow meter 36.
A plurality of illumination units 37 are disposed so as to face the front surface 31A of the housing 31 with the plurality of flowmeters 36 interposed therebetween, and light is irradiated from each illumination unit 37 to the corresponding flowmeter 36. Each flowmeter 36 is visually recognizable through the corresponding window portion 31A of the front surface 31A of the case portion 31 from the outside.
According to this configuration, since each flow meter 36 is illuminated from the opposite side of the front surface 31A of the case 31, even when the scale line of the tapered tube 36a is small or the diameter of the float 36b is small, the user can clearly visually recognize the scale and the float 36 b. This makes it possible to easily read the flow rates of the reaction-inhibiting gas, the reaction gas, and the reaction-stopping gas.
Each illumination unit 37 emits light when the corresponding on-off valve 34 is in the open state, and stops emitting light when the corresponding on-off valve 34 is in the closed state. Therefore, the user can easily recognize which gas is introduced into the internal space of the main body 10 by visually recognizing the illuminated flow meter 36.
The adjustment operation portions 35a of the plurality of adjustment valves 35 are provided on the front surface 31A of the case 31 where the plurality of flow meters 36 can be visually recognized. Therefore, the user can easily adjust the flow rate of the corresponding gas to a desired value by adjusting the corresponding adjustment operation unit 35a while confirming the flow rate presented by each flow meter 36.
For example, although the reaction gas is oxygen gas having a high concentration in this example, it is sometimes desirable to use air as the reaction gas. In this case, the user can generate gases (nitrogen gas 80% and oxygen gas 20%) having the same composition as that of air by adjusting the adjustment operation portions 35a corresponding to the reaction-inhibiting gas (nitrogen gas) and the reaction gas (oxygen gas), respectively. In this case, since 2 on-off valves 34 corresponding to the reaction-inhibiting gas and the reaction gas are simultaneously opened, 2 illumination sections 37 corresponding to the on-off valves 34 emit light simultaneously.
(5) Other embodiments
(a) In the above embodiment, the measuring unit 74 measures the time until the sample S starts autoignition as the condition that the sample S reaches autoignition, but the embodiment is not limited thereto. The measurement unit 74 may measure the temperature at which the sample S spontaneously ignites as the condition for the sample S to spontaneously ignite.
(b) In the above embodiment, the gas supply unit 30 includes the 3-group introduction unit 32, the introduction pipe 33, the opening/closing valve 34, the adjustment valve 35, the flow meter 36, and the illumination unit 37, but the embodiment is not limited thereto. The gas supply unit 30 may include a 1-unit introduction unit 32, an introduction pipe 33, an opening/closing valve 34, a control valve 35, a flow meter 36, and an illumination unit 37. In this case, the gas supply unit 30 may not include the confluence pipe 38, and the gas supply unit 30 may supply the reaction suppressing gas, the reaction gas, or the reaction stopping gas to the internal space of the body 10 through the common introduction unit 32, the introduction pipe 33, the opening/closing valve 34, the control valve 35, the flow meter 36, and the supply pipe 39.
Alternatively, the gas supply unit 30 may include two sets of the introduction unit 32, the introduction pipe 33, the opening/closing valve 34, the adjustment valve 35, the flow meter 36, and the illumination unit 37. In this case, the reaction gas may be supplied through the 1-group introduction unit 32, the introduction pipe 33, the opening/closing valve 34, the control valve 35, and the flow meter 36, and the reaction-inhibiting gas or the reaction-stopping gas may be supplied through the other 1-group introduction unit 32, the introduction pipe 33, the opening/closing valve 34, the control valve 35, and the flow meter 36.
(c) In the above embodiment, the illumination unit 37 emits light in conjunction with the open/close state of the opening/closing valve 34, but the embodiment is not limited to this. The illumination unit 37 may emit light at all times.
(d) In the above embodiment, the opening/closing valve 34 and the adjustment valve 35 are inserted into the introduction pipe 33 independently of each other, but the embodiment is not limited thereto. A valve in which the on-off valve 34 and the adjustment valve 35 are integrated may be inserted into the introduction pipe 33. Alternatively, one or both of the on-off valve 34 and the adjustment valve 35 may not be inserted into the introduction pipe 33.
(e) In the above embodiment, the light blocking portion 3 is disposed between each adjacent two of the flowmeters 36, but the embodiment is not limited thereto. When each adjacent two flow meters 36 are sufficiently separated from each other to prevent each flow meter 36 from being illuminated by the illumination unit 37 that does not correspond thereto, the light blocking unit 3 may not be disposed between each adjacent two flow meters 36. Alternatively, when the illumination unit 37 emits light at all times without being interlocked with the open/close state of the opening/closing valve 34, the light blocking unit 3 may not be disposed between each adjacent two flow meters 36.
(f) In the above embodiment, the adjustment operating portion 35a of the adjustment valve 35 is provided on the front surface 31A of the housing portion 31, but the embodiment is not limited thereto. The adjustment operation portion 35a may be provided in a portion different from the front surface 31A of the case 31. Alternatively, when the flow rate of the adjustment valve 35 can be remotely adjusted, the adjustment operation portion 35a may not be provided in the housing portion 31.
(6) Form of the composition
(item 1) A spontaneous combustion test apparatus for evaluating conditions under which a sample reaches spontaneous combustion, wherein the spontaneous combustion test apparatus may be,
this spontaneous combustion test device includes:
a main body having an internal space for storing a sample;
an introduction pipe that introduces a gas into the internal space of the main body;
the flowmeter comprises a conical pipe and a floating ball, and prompts the flow rate of gas flowing in the introducing pipe according to the height of the floating ball in the conical pipe;
a housing portion having a flow rate presentation surface, housing the introduction tube, and housing the flow meter so that the flow meter can be visually recognized through the flow rate presentation surface; and
and an illumination unit disposed opposite to the flow rate presenting surface with the flow rate meter interposed therebetween in the housing, and configured to be capable of irradiating the flow rate meter with light.
In this spontaneous combustion test apparatus, the introduction pipe, the flowmeter, and the illumination unit are housed in a housing. Gas is introduced into the internal space of the main body containing the sample by the introduction tube. The flow rate of the gas flowing in the inlet pipe is indicated according to the height of the floating ball in the conical pipe of the flow meter. Light is irradiated to the flowmeter from an illumination unit disposed opposite to the flow rate presentation surface with the flowmeter interposed therebetween. The flowmeter can be visually recognized from the outside through the flow rate indicating surface of the case portion.
According to this configuration, since the flowmeter is illuminated from the opposite side of the flow rate indicating surface, the user can visually recognize the scale and the float ball clearly even when the scale line of the tapered tube is small or the diameter of the float ball is small. This makes it possible to easily read the flow rate of the gas presented by the flow meter.
(item 2) in the spontaneous combustion test apparatus according to item 1, it is also possible that,
the housing portion further includes an on-off valve that is switched between an open state in which gas is caused to flow through the introduction pipe and a closed state in which the flow of gas through the introduction pipe is blocked,
the illumination unit emits light when the open/close valve is in the open state, and stops emitting light when the open/close valve is in the closed state.
In this case, the user can easily recognize whether or not the gas is introduced into the internal space of the main body by visually recognizing whether or not the flow meter is illuminated.
(item 3) in the spontaneous combustion test apparatus according to item 1, the spontaneous combustion test apparatus may further comprise,
a plurality of the introducing pipes can be respectively provided for supplying a plurality of gases,
the flow meter is provided with a plurality of inlet pipes corresponding to the plurality of inlet pipes,
the illumination unit is provided in plurality corresponding to the plurality of flowmeters.
In this case, the flow rates of the plurality of gases can be easily read.
(item 4) in the spontaneous combustion test apparatus according to item 3, the spontaneous combustion test apparatus may further comprise,
the housing portion further includes a plurality of on-off valves that are switched between an open state in which gas is caused to flow through the corresponding introduction pipes and a closed state in which the gas flow through the corresponding introduction pipes is blocked,
each illumination unit emits light when the corresponding on-off valve is in the open state, and stops emitting light when the corresponding on-off valve is in the closed state.
In this case, the user can easily recognize the type of the gas introduced into the internal space of the main body by visually recognizing the illuminated flow meter.
(item 5) in the spontaneous combustion test apparatus according to item 4, the spontaneous combustion test apparatus may further comprise,
the housing further includes a light blocking portion disposed between each adjacent two of the flowmeters, the light blocking portion blocking light emitted from each of the illumination portions to the flowmeter not corresponding to the illumination portion.
According to this configuration, even when a plurality of flowmeters are arranged close to each other, it is possible to prevent each flowmeter from being illuminated by an illumination unit that does not correspond to the flowmeter. Therefore, the user can more reliably recognize the type of the introduced gas.
(item 6) the spontaneous combustion test apparatus according to any one of items 3 to 5, wherein,
the plurality of introduction tubes includes:
a 1 st introduction pipe for supplying a reaction inhibiting gas for inhibiting an oxidation reaction of a sample;
a 2 nd introduction pipe for supplying a reaction gas for accelerating an oxidation reaction of the sample; and
and a 3 rd introduction pipe for supplying a reaction stopping gas for stopping the oxidation reaction of the sample.
In this case, by using the reaction-inhibiting gas, the reaction gas, and the reaction-stopping gas, it is possible to easily evaluate the conditions under which the sample reaches autoignition. In addition, the user can easily recognize the flow rates of the reaction-inhibiting gas, the reaction gas, and the reaction-stopping gas.
(item 7) the spontaneous combustion test apparatus according to any one of items 1 to 6, wherein,
the housing further includes an adjustment valve for adjusting a flow rate of the gas in the introduction pipe,
the regulating valve has a regulating operation part operated for regulating the flow rate of the gas,
the adjustment operation portion is exposed to the outside of the housing portion from the flow rate presentation surface.
In this case, the adjustment operation unit is provided on a flow rate presentation surface on which the flowmeter can be visually recognized. Therefore, the user can easily adjust the flow rate of the gas to a desired value by adjusting the adjustment operation unit while confirming the flow rate presented by the flow meter.
Claims (7)
1. A spontaneous combustion test apparatus for evaluating a condition under which a sample reaches spontaneous combustion, wherein,
this spontaneous combustion test device includes:
a main body having an internal space for storing a sample;
an introduction pipe that introduces a gas into the internal space of the main body;
the flowmeter comprises a conical pipe and a floating ball, and prompts the flow rate of gas flowing in the introducing pipe according to the height of the floating ball in the conical pipe;
a housing portion having a flow rate presentation surface, housing the introduction tube, and housing the flow meter so that the flow meter can be visually recognized through the flow rate presentation surface; and
and an illumination unit disposed in the housing so as to face the flow rate presenting surface with the flow meter interposed therebetween, the illumination unit being configured to be capable of irradiating the flow meter with light.
2. The autoignition test apparatus according to claim 1,
the housing portion further includes an on-off valve that is switched between an open state in which gas is caused to flow through the introduction pipe and a closed state in which the flow of gas through the introduction pipe is blocked,
the illumination unit emits light when the open/close valve is in the open state, and stops emitting light when the open/close valve is in the closed state.
3. The autoignition test apparatus according to claim 1,
a plurality of the introducing pipes can be respectively provided for supplying a plurality of gases,
the flow meter is provided with a plurality of inlet pipes corresponding to the plurality of inlet pipes,
the illumination unit is provided in plurality corresponding to the plurality of flowmeters.
4. The autoignition test apparatus according to claim 3,
the housing portion further includes a plurality of on-off valves that are switched between an open state in which gas is caused to flow through the corresponding introduction pipes and a closed state in which the gas flow through the corresponding introduction pipes is blocked,
each illumination unit emits light when the corresponding on-off valve is in the open state, and stops emitting light when the corresponding on-off valve is in the closed state.
5. The autoignition test apparatus according to claim 4,
the housing further includes a light blocking portion disposed between each adjacent two of the flowmeters, the light blocking portion blocking light emitted from each of the illumination portions to the flowmeter not corresponding to the illumination portion.
6. The autoignition test apparatus according to any one of claims 3 to 5, wherein,
the plurality of introduction tubes includes:
a 1 st introduction pipe for supplying a reaction inhibiting gas for inhibiting an oxidation reaction of a sample;
a 2 nd introduction pipe for supplying a reaction gas for accelerating an oxidation reaction of the sample; and
and a 3 rd introduction pipe for supplying a reaction stopping gas for stopping the oxidation reaction of the sample.
7. The autoignition test apparatus according to any one of claims 1 to 5, wherein,
the housing further includes an adjustment valve for adjusting a flow rate of the gas in the introduction pipe,
the regulating valve has a regulating operation part operated for regulating the flow rate of the gas,
the adjustment operation portion is exposed to the outside of the housing portion from the flow rate presentation surface.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019109851A JP2020201197A (en) | 2019-06-12 | 2019-06-12 | Spontaneous ignition testing device |
| JP2019-109851 | 2019-06-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112083026A true CN112083026A (en) | 2020-12-15 |
Family
ID=73734640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010237801.5A Withdrawn CN112083026A (en) | 2019-06-12 | 2020-03-30 | Spontaneous combustion test device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2020201197A (en) |
| CN (1) | CN112083026A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112083027A (en) * | 2019-06-12 | 2020-12-15 | 株式会社岛津制作所 | Spontaneous combustion test device |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3010175A1 (en) * | 1979-03-19 | 1980-10-09 | Magyar Tudomanyos Akademia | DEVICE FOR MEASURING THE FLOW RATE OF FLOWERS |
| JPH09236559A (en) * | 1996-02-29 | 1997-09-09 | Shimadzu Corp | Spontaneous combustion testing device |
| JPH09304310A (en) * | 1996-05-09 | 1997-11-28 | Shimadzu Corp | Spontaneous ignition test device |
| JPH09304311A (en) * | 1996-05-09 | 1997-11-28 | Shimadzu Corp | Spontaneous ignition testing device |
| KR20020006138A (en) * | 2000-07-11 | 2002-01-19 | 이구택 | a float type area flow meter |
| JP2003121216A (en) * | 2001-10-11 | 2003-04-23 | Disco Abrasive Syst Ltd | Float type flowmeter |
| KR20060126339A (en) * | 2005-06-03 | 2006-12-07 | 여수대학교산학협력단 | Gas flow meter |
| JP2007327818A (en) * | 2006-06-07 | 2007-12-20 | Dkk Toa Corp | Flow meter and flow method analyzer |
| JP2010078331A (en) * | 2008-09-24 | 2010-04-08 | Riken Keiki Co Ltd | Float-type gas flowmeter and gas detector equipped with the same |
| JP2011102773A (en) * | 2009-11-11 | 2011-05-26 | Tokyo Keiso Co Ltd | Area flowmeter |
| KR20180033882A (en) * | 2016-09-26 | 2018-04-04 | 한국전력공사 | Measuring apparatus for spontaneous ignition of coal |
-
2019
- 2019-06-12 JP JP2019109851A patent/JP2020201197A/en active Pending
-
2020
- 2020-03-30 CN CN202010237801.5A patent/CN112083026A/en not_active Withdrawn
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3010175A1 (en) * | 1979-03-19 | 1980-10-09 | Magyar Tudomanyos Akademia | DEVICE FOR MEASURING THE FLOW RATE OF FLOWERS |
| JPH09236559A (en) * | 1996-02-29 | 1997-09-09 | Shimadzu Corp | Spontaneous combustion testing device |
| JPH09304310A (en) * | 1996-05-09 | 1997-11-28 | Shimadzu Corp | Spontaneous ignition test device |
| JPH09304311A (en) * | 1996-05-09 | 1997-11-28 | Shimadzu Corp | Spontaneous ignition testing device |
| KR20020006138A (en) * | 2000-07-11 | 2002-01-19 | 이구택 | a float type area flow meter |
| JP2003121216A (en) * | 2001-10-11 | 2003-04-23 | Disco Abrasive Syst Ltd | Float type flowmeter |
| KR20060126339A (en) * | 2005-06-03 | 2006-12-07 | 여수대학교산학협력단 | Gas flow meter |
| JP2007327818A (en) * | 2006-06-07 | 2007-12-20 | Dkk Toa Corp | Flow meter and flow method analyzer |
| JP2010078331A (en) * | 2008-09-24 | 2010-04-08 | Riken Keiki Co Ltd | Float-type gas flowmeter and gas detector equipped with the same |
| JP2011102773A (en) * | 2009-11-11 | 2011-05-26 | Tokyo Keiso Co Ltd | Area flowmeter |
| KR20180033882A (en) * | 2016-09-26 | 2018-04-04 | 한국전력공사 | Measuring apparatus for spontaneous ignition of coal |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112083027A (en) * | 2019-06-12 | 2020-12-15 | 株式会社岛津制作所 | Spontaneous combustion test device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2020201197A (en) | 2020-12-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101822658B1 (en) | Liquid sample heating vaporizer | |
| CN102495128B (en) | A kind of heating and temperature controlling device being suitable for doping gas generating means | |
| CN112083026A (en) | Spontaneous combustion test device | |
| US20100120139A1 (en) | Incubation apparatus | |
| JP4671623B2 (en) | Combustible gas detector with flow sensor container and method for measuring combustible gas | |
| KR101827958B1 (en) | Combustion experiment device | |
| JP7042349B2 (en) | Incubator | |
| CA1079088A (en) | Apparatus for measuring the alcohol percentage in the breath of an examinee | |
| JPH06331525A (en) | Moisture measuring apparatus | |
| CN103210305B (en) | Combustion experimental device | |
| CN112083027A (en) | Spontaneous combustion test device | |
| US2990749A (en) | Spectral flame burners and systems | |
| US3994171A (en) | Clinical testing apparatus | |
| US2812242A (en) | Automatic titration apparatus | |
| US5100244A (en) | Gas calorimeter and method of measuring the calorific value of fuel gases | |
| CN112113997A (en) | Spontaneous combustion test device | |
| KR20210045775A (en) | Control device for supplying carbon dioxide | |
| JP2010216916A (en) | Device and method for measurement of ignition temperature | |
| CN110036292A (en) | Atomic Absorption SpectrophotometerICP and elemental analysis method | |
| CN209559812U (en) | A kind of Zirconium oxide analyzer check system | |
| JP6287356B2 (en) | Combustion calorie measurement system | |
| CN220709076U (en) | Stainless steel bell-type furnace residual oxygen analysis probe calibration device | |
| KR101760104B1 (en) | Apparatus for branching gas | |
| JP2011180910A (en) | Flow control device and flow control method | |
| JPS5855742A (en) | Direct calorimeter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20201215 |
|
| WW01 | Invention patent application withdrawn after publication |