CN220820138U - Small element hot ignition explosion test device - Google Patents

Abstract

The utility model discloses a small-element thermal ignition explosion test device which comprises an outer cavity, a test cavity, a temperature detection assembly and a control assembly, wherein a containing space is arranged in the outer cavity; the test cavity is detachably arranged in the accommodating space, a test platform for placing the element to be tested is arranged in the test cavity, and the test platform is provided with an electric connection end which is used for being connected with a power supply; the temperature detection component is movably arranged in the test cavity and is arranged towards the element to be tested and is used for detecting the temperature of the element to be tested; the control component is electrically connected with the power connection end and the temperature detection component respectively, and is used for controlling the on-off of the power connection end and switching on the element to be detected when the temperature of the element to be detected reaches a preset temperature threshold value. The device is used for solving the problems that a test cavity of the existing small element ignition test device is not detachable, the service life is short, and the explosion test is uncontrollable.

Description

Small element hot ignition explosion test device

Technical Field

The utility model relates to the technical field of electrical element testing, in particular to a small element hot ignition explosion test device.

Background

At present, most of the existing small element ignition test methods are based on small element ignition test equipment, after an element to be tested is placed in a test cavity, explosive mixtures such as mixed explosive gases and the like are injected into the test cavity, after the element to be tested is electrified, whether the heat generated by the element to be tested in the electrifying working process is enough to cause the explosive gases injected into the test cavity to be exploded is observed and recorded, so that whether the element to be tested can ignite the explosive mixtures expected to be used by the element or the corresponding gas groups is checked.

However, the existing test method is limited and can only be carried out at a specific single environmental temperature, so that the problem of uncontrollable explosion test exists. In addition, the cavity structure of the existing small-element thermal ignition explosion test device is mostly assembled and fixed in the heat insulation box, and after multiple or long-time explosion tests, the problems of deformation, carbon deposition and the like are easy to occur, so that the small-element thermal ignition explosion test device is short in service life and high in test cost.

Disclosure of utility model

The utility model mainly aims to provide a small-element hot ignition explosion test device which is used for solving the problems that a test cavity is not detachable, the small-element hot ignition explosion test device is short in service life and the explosion test is uncontrollable.

To achieve the above object, the present utility model provides a small-element thermal ignition explosion test apparatus comprising:

the outer cavity is internally provided with an accommodating space;

The test cavity is detachably arranged in the accommodating space, a test platform for placing the element to be tested is arranged in the test cavity, and the test platform is provided with an electric connection end which is used for being connected with a power supply;

the temperature detection component is movably arranged in the test cavity and is arranged towards the element to be tested and is used for detecting the temperature of the element to be tested;

The control component is electrically connected with the power connection end and the temperature detection component respectively, and is used for controlling the on-off of the power connection end and switching on the element to be detected when the temperature of the element to be detected reaches a preset temperature threshold value.

In an embodiment, the small-element hot-spot blasting test device further comprises a material conveying assembly, wherein a discharge end of the material conveying assembly is connected with a feed inlet of the test cavity, a feed end of the material conveying assembly is used for being connected with inflammable and explosive substances and inputting the inflammable and explosive substances into the test cavity, and the control assembly is connected with the material conveying assembly and used for controlling on-off of the material conveying assembly and controlling to close the material conveying assembly after the inflammable and explosive substances input into the test cavity reach preset target values.

In an embodiment, the material conveying assembly is provided with a power device, and the control assembly is connected with the power device and is used for driving the power device to apply power to the material conveying assembly so that the inflammable and explosive material is input into the test cavity.

In an embodiment, the flammable and explosive material includes a flammable gas and/or a flammable liquid.

In an embodiment, the inflammable and explosive material includes explosive gas, the material conveying assembly includes a gas distribution assembly, the gas distribution assembly is provided with a gas outlet channel, the gas outlet channel is communicated with a gas inlet of the test cavity, a gas inlet end of the gas distribution assembly is provided with at least one gas inlet channel, each gas inlet channel is used for inputting an explosive gas, the control assembly is connected with the gas distribution assembly and used for controlling the gas outlet channel to be communicated with at least one gas inlet channel so that the corresponding explosive gas is input into the test cavity.

In an embodiment, the small-element hot-spot explosion test device further comprises a heating component, the heating component is arranged around the test cavity, and the control component is electrically connected with the heating component and used for controlling the heating component to heat until the temperature of the element to be tested reaches a preset temperature threshold.

In an embodiment, the test chamber is provided with a mounting bracket, the mounting bracket includes a connecting piece, a rotating structure and a swinging structure, the connecting piece is mounted in the test chamber, the rotating structure is rotatably mounted on the connecting piece, the swinging structure is used for mounting the temperature detection component and is rotatably mounted on the rotating structure, so as to drive the temperature detection component to move close to or away from the element to be tested.

In an embodiment, the small element hot spot explosion test device further comprises an ignition device, the ignition device is installed in the test cavity, and the control assembly is connected with the ignition device and used for controlling the ignition device to discharge after the temperature of the element to be tested reaches a preset temperature threshold.

In an embodiment, the small element hot spot explosion test device further comprises a sealing cover, wherein the sealing cover is movably arranged on the outer cavity between a sealing cover state and an opening state, a sealing piece is arranged on the sealing cover, and in the sealing cover state, the sealing piece is abutted between the test cavity and the sealing cover.

In an embodiment, the small element hot spot explosion test device further comprises an air outlet pipeline, one end of the air outlet pipeline is communicated with the air outlet of the test cavity, a vacuum pump is arranged on the air outlet pipeline, and the control component is connected with the air outlet pipeline and the vacuum pump and is used for controlling the air outlet pipeline to be closed and controlling the vacuum pump to work after receiving a starting signal; and the device is also used for controlling to open the air outlet pipeline after receiving the stop signal so as to discharge the air in the test cavity.

Compared with the prior art, the utility model has the following beneficial effects:

The cavity structure is divided into an outer cavity and a test cavity, the test cavity is detachably arranged in a containing space of the outer cavity, the test cavity is protected and supported through the outer cavity, the test cavity is separated from the outer cavity as a main cavity for explosion test, and the replacement and cleaning of the cavity structure can be completed by independently disassembling the test cavity, so that the problems of deformation and carbon deposition of the whole explosion test device after long-term multiple explosion test are avoided, the maintenance and replacement cost is reduced, and the service life of the small-element hot ignition explosion test device is prolonged; the test chamber is internally provided with a test platform for placing the element to be tested, the test platform is provided with an electric connection end, the electric connection end is used for being connected with a power supply, the temperature detection assembly is movably installed in the test chamber and is arranged towards the element to be tested and is used for detecting the temperature of the element to be tested, the control assembly is electrically connected with the electric connection end and the temperature detection assembly respectively, the control assembly controls the on-off of the electric connection end and is used for switching on the element to be tested when the temperature of the element to be tested reaches a preset temperature threshold value, the control assembly controls the explosion test process through controlling the operation of the heating assembly, the test procedure can be reduced, whether the element to be tested is electrified to ignite or detonate inflammable and explosive substances in the test chamber when the preset temperature threshold value is reached through the test, the quality of the element to be tested is checked, the operation is convenient, the operation is effectively improved, and the test cost is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a functional block diagram of one embodiment of a small-element thermal-ignition explosion testing apparatus of the present utility model;

FIG. 2 is a schematic view of a portion of one embodiment of a small-element thermal-ignition explosion testing apparatus of the present utility model;

FIG. 3 is a schematic view of the construction of an embodiment of the small-element thermal-ignition explosion testing apparatus of the present utility model;

FIG. 4 is a schematic view of an embodiment of a test chamber according to the present utility model;

FIG. 5 is a schematic view of a portion of the test chamber of the present utility model from another perspective;

FIG. 6 is a schematic view of a temperature sensing assembly and mounting bracket according to the present utility model;

FIG. 7 is a schematic view of an embodiment of a material handling assembly of the present utility model;

FIG. 8 is a schematic view of another embodiment of a material handling assembly of the present utility model;

Fig. 9 is a schematic view of a portion of a material conveying assembly according to an embodiment of the present utility model.

Reference numerals illustrate:

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, if all the directional indicators in the embodiments of the present utility model are only used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture, if the specific posture is changed, the directional indicators are correspondingly changed.

If the description of "first", "second", etc. in this disclosure is for descriptive purposes only, it is not to be construed as indicating or implying a relative importance thereof or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. If the description of "a and/or B" is referred to in the present utility model, it means that either scheme a or scheme B is included, or both scheme a and scheme B are included. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

At present, the application range of small elements such as transistors, resistors and the like is wide, and the small elements are large-sized devices such as aerospace, military and the like, small-sized electric devices such as watches, LED lamps and the like, and even in some explosive dangerous places, the small-sized electric elements are arranged. However, due to the variability of the process and manufacturing criteria, it is not ensured that the quality of all the small elements remains constant, and in the explosive hazardous environments of different groups, the temperatures at which explosions are caused are also different, and small elements that do not meet the requirements of the criteria are particularly prone to explosions.

In order to prevent and stop explosion, all electric equipment used in explosion dangerous places and small elements capable of generating sparks or heating are required to be tested and detected. The small element generates heat when the electric equipment is electrified, so that the small element needs to be detected independently. In general, in an explosion-proof electrical device, the maximum temperature is allowed to be appropriately higher than the temperature value of a corresponding temperature group for electrical components such as a small element having a total surface area of not more than 1000mm ², such as a transistor, a resistor, and a potentiometer.

The existing small-sized electric element ignition test method is mainly based on small element ignition test equipment, after an element to be tested is placed in a test cavity, mixed explosive gas is injected into the test cavity, after the element to be tested is electrified, whether the heat generated by the element to be tested in the electrifying working process is enough to cause the explosive gas injected into the test cavity to explode is recorded through observation, so that whether the element to be tested is good or not is checked. However, the existing test method is limited and can only be carried out at a specific single environmental temperature, so that the problem of uncontrollable explosion test exists. In addition, the cavity structure of the existing small-element thermal ignition explosion test device is mostly assembled and fixed in the heat insulation box, and after multiple or long-time explosion tests, the problems of deformation, carbon deposition and the like are easy to occur, so that the small-element thermal ignition explosion test device is short in service life and high in test cost.

In order to solve the defects in the prior art, the utility model provides a small element hot ignition explosion test device, which simulates different explosive dangerous environments such as inflammable and explosive substances with different temperatures and different concentrations in a test cavity, tests whether heat generated on the surface of a small element waiting to be tested after the element is electrified and works in different environments ignites the inflammable and explosive substances in the test cavity or not, and tests relevant parameters and quality of the element to be tested so as to guide selection standards of the element used in environments such as dangerous places and the like and prevent explosion; the small element hot spot burning explosion test device disclosed by the utility model also solves the problems that a test cavity is not detachable, the small element hot burning explosion test device has short service life and the explosion test is uncontrollable through the improvement of the structure.

Referring to fig. 1 to 9, the small element hot spot explosion test device comprises an outer cavity 110, a test cavity 200, a temperature detection assembly 310 and a control assembly 400, wherein a containing space 111 is arranged in the outer cavity 110, the test cavity 200 is detachably installed in the containing space 111, a test platform 210 for placing an element 800 to be tested is arranged in the test cavity 200, the test platform 210 is provided with an electric connection end 211, and the electric connection end 211 is used for being connected with a power supply 910.

It can be appreciated that the small-element thermal ignition explosion test device comprises a cavity structure, the cavity structure comprises an outer cavity 110 and a test cavity 200, the cavity structure is divided into the outer cavity 110 and the test cavity 200 detachably sleeved in the outer cavity 110, the test cavity 200 is protected and accepted by the outer cavity 110 and is separated from the outer cavity 110 as a main cavity of an explosion test, the disassembly and the assembly are convenient, the replacement are convenient, the problems of deformation, carbon accumulation and the like of the whole explosion test device after the long-term multiple explosion test are avoided, the whole small-element thermal ignition explosion test device can be retested by disassembling and cleaning or replacing the test cavity 200, and the need of replacing the whole small-element thermal ignition explosion test device is avoided, so that the maintenance and replacement cost is reduced, and the service life of the small-element thermal ignition explosion test device is prolonged.

Further, the small-element hot-spot explosion testing device further comprises an outer box body 120, wherein the outer cavity body 110 is sleeved in the outer box body 120 and is connected and fixed with the outer box body 120 into an integral structure. Optionally, the test chamber 200 and the outer chamber 110 may be made of stainless steel, the outer chamber 120 may be made of a frame structure made of sheet metal material, the outer chamber 120 is disposed in a small-element thermal ignition explosion test device, the small-element hot spot explosion test device is further provided with a monitoring device such as a camera for recording a test process, a display 930 for displaying test data such as temperature data and inflammable and explosive data, and the test process, and an operation table 920 for outputting an operation instruction; other functional devices may be specifically provided according to the actual situation, and are not limited herein. In addition, when the material conveying assembly 500 and other pipeline connecting structures are arranged, the material inlet, the material outlet and the like can be arranged at the bottom of the test cavity 200, and the outer cavity 110 is correspondingly perforated for penetrating through the pipeline, so that inflammable and explosive materials, gases and the like can enter and exit the test cavity 200 through the pipeline. It should be noted that, when the pipeline is provided, a sealing structure such as a sealing ring and a sealant is provided between the pipeline and the connection position of the outer cavity 110 and/or the test cavity 200, so as to avoid leakage of materials or gas, and influence reliability of test results and even threaten safety of test operators.

The temperature detection component 310 is movably installed in the test chamber 200 and is disposed towards the element 800 to be tested, for detecting the temperature of the element 800 to be tested; the control assembly 400 is electrically connected to the power connection terminal 211 and the temperature detection assembly 310, and the control assembly 400 is used for controlling the power connection terminal 211 to be turned on or off, so as to turn on the device 800 to be tested when the temperature of the device 800 to be tested reaches a preset temperature threshold.

Specifically, the temperature detecting component 310 is disposed towards or near the device under test 800, and is used for detecting the surface temperature of the device under test 800 and the temperature in the test chamber 200, and the control component 400 is used for controlling the device under test 800 to be turned on according to the detected temperature, and controlling and maintaining the environmental test temperature in the test chamber 200 by controlling the heating component 600. It should be noted that, the temperature detecting component 310 is used for detecting the temperature of the element 800 to be detected, the temperature of the element 800 to be detected may be the temperature of the outer surface of the element 800 to be detected, or may be the temperature of the surface of the element 800 to be detected, and in general, for small elements such as a potentiometer, the temperature detecting component 310 is used for detecting the temperature of the surface thereof, so that the detecting precision can be improved, and the test result can be optimized.

The test platform 210 of the test chamber 200 is provided with an electrical terminal 211, and the electrical terminal 211 is used for being connected with the power supply 910, and the element 800 to be tested is placed on the test platform 210 and connected with the electrical terminal 211 during test. The small-element thermal ignition explosion test device disclosed by the utility model detects the temperature of the element 800 to be tested in the test cavity 200 through the temperature detection component 310, the control component 400 is used for controlling the on-off of the power connection end 211 according to the temperature of the element 800 to be tested, and is used for switching on the element 800 to be tested when the temperature of the element 800 to be tested reaches a preset temperature threshold value, and whether the element 800 to be tested is electrified to ignite or detonate inflammable and explosive substances in the test cavity 200 or not to test the quality of the element 800 to be tested through the test when the temperature reaches the preset temperature threshold value. The test process is controlled by the control assembly 400, so that the operation is convenient, the operation efficiency is effectively improved, and the test cost is reduced.

As a specific example, the test platform 210 is provided with a fixing connector such as a metal clip and/or a screw, and during testing, the device 800 to be tested is connected and fixed on the test platform 210 via a conductive structure 112 such as a metal clip and a screw, and is connected with the electric terminal 211 through a locking member such as a screw, and the control component 400 controls to connect the device 800 to be tested, so that the electric terminal 211 inputs the electricity of the power supply 910 to the device 800 to be tested, so as to provide the device 800 to be tested with the electric quantity required by the test, and electrify the device 800 to be tested, so that whether the device 800 to be tested in the electrified state ignites inflammable and explosive objects in the test cavity 200 under the condition that the temperature of the test cavity 200 reaches a preset threshold value can be detected, so as to perform performance test on the device 800 to be tested, and detect the quality of the device 800 to be tested.

In the small-element thermal ignition explosion test apparatus according to the present utility model, it is necessary to inject a flammable and explosive material into the test chamber 200 before the device 800 to be tested is turned on. Generally, the quality of the same batch of electrical components is detected by randomly screening the same to perform an explosion test, when the temperature of the to-be-tested element 800 reaches a preset temperature threshold, if the to-be-tested element 800 is connected, the to-be-tested element 800 is a defective product, and if the to-be-tested element 800 is connected, the to-be-tested element 800 is not connected, the to-be-tested element 800 is a defective product.

In an embodiment, the small-element hot-spot blasting test device further comprises a material conveying assembly 500, wherein a discharge end of the material conveying assembly 500 is connected with a feed inlet of the test cavity 200, a feed end of the material conveying assembly 500 is used for being connected with inflammable and explosive materials and inputting the inflammable and explosive materials into the test cavity 200, and the control assembly 400 is connected with the material conveying assembly 500 and used for controlling on-off of the material conveying assembly 500 and controlling to close the material conveying assembly 500 after the inflammable and explosive materials input into the test cavity 200 reach a preset target value.

By automatically conveying the required amount of inflammable and explosive substances to the test cavity 200, automatic feeding is realized, and the problems that the operation is inconvenient and the explosion test process cannot be accurately controlled due to the manual control of the conveyed amount of inflammable and explosive substances and manual feeding are avoided, so that the operation efficiency and the operation precision are improved.

The inflammable and explosive material may be in gas, liquid or powder form, and is not limited herein according to practical arrangement.

In one embodiment, the material conveying assembly 500 is provided with a power device 511, and the control assembly 400 is connected to the power device 511 for driving the power device 511 to apply power to the material conveying assembly 500 so as to input inflammable and explosive materials into the test chamber 200. The automatic feeding is realized by applying power to the material conveying assembly 500 through the power device 511, so that the problems of complex operation and inconvenient operation caused by manual control of feeding and feeding amount are solved, and the operation efficiency is effectively improved.

Optionally, the material conveying assembly 500 includes a conveying pipe 521 and an injector 522, where the injector 522 has a feeding end and a discharging end, the conveying pipe 521 is disposed at the feeding end of the injector 522, the injector 522 is connected with a device for storing inflammable and explosive materials such as a storage device through the conveying pipe 521, for conveying inflammable and explosive materials to be injected into the test chamber 200 into the injector 522, the discharging end of the injector 522 is connected with a feeding position of the test chamber 200 such as an injection position 240 of the test chamber 200, a push rod is disposed in the middle of the injector 522, and the power device 511 is connected with the push rod, for applying power to the push rod to send the materials in the injector 522 into the test chamber 200. The power device 511 may specifically include any power movable device, device or related electrical element suitable for practical use, and may specifically be a power structure such as a cylinder, an electric push rod, or a motor for driving, which is not limited herein.

Further, in order to reduce the occupation of space, the transfer and test are convenient, and the feeding position of the test chamber 200 is arranged at the bottom. A valve assembly 550 such as a flow control valve is provided on a side of the material delivery assembly 500 near the feed end of the injector 522 to control the flow of the combustible and explosive material into the injector 522, and the valve assembly 550 is used to control the stop of the feed after the expected flow of the combustible and explosive material into the injector 522 reaches a preset target value. In addition, according to practice, a valve can be further disposed between the discharge end of the material conveying assembly 500 and the feeding position of the test chamber 200, so as to avoid backflow of the liquid inflammable and explosive material and influence on the test result.

Further, the test chamber 200 is provided with one or more feed levels for connection by each feed level to a storage means such as a storage tank 5313 for storing inflammable and explosive substances. Optionally, when multiple inflammable and explosive substances are needed in the system test, the multiple storage tanks 5313 for storing the inflammable and explosive substances are connected to multiple feeding positions at the bottom of the test chamber 200 through the corresponding conveying pipes 521 one to one, so as to convey the corresponding inflammable and explosive substances into the test chamber 200.

Optionally, a repairing rubber 523 or a sealing structure made of other materials is specifically disposed between the discharge end of the injector 522 and the feeding position of the test chamber 200 according to practical situations, so as to optimize the tightness, and avoid the material overflowing from the connection position between the material conveying assembly 500 and the test chamber 200, which affects the test effect and the reliability of the test result. In particular, a scale mark, a meter, a control valve and other metering and controlling devices can be arranged on the conveying pipeline 521 of the material conveying assembly 500, the injector 522 or other positions of the material conveying assembly 500 so as to control the amount of inflammable and explosive materials conveyed to the test cavity 200 and realize quantitative control.

In one embodiment, the flammable and explosive material includes a flammable gas and/or a flammable liquid.

The explosive gas is hydrogen, methane, ethane, ethylene, phosphine and the like which can perform self-oxidation reaction under certain temperature and pressure conditions and emit a large amount of heat and flame, and the inflammable liquid is diethyl ether, acetaldehyde, acetone and the like which exist in a liquid state at normal temperature and are easy to cause combustion when meeting fire.

Alternatively, when applied to a T4 group electrical device, it is necessary to add an explosive gas and inject a flammable liquid such as diethyl ether when testing a mixture of the T4 group at an explosion level. Specifically, on the basis of the above example, referring to fig. 8, the illustrated material conveying assembly 500 further includes a storage tank 5313 for storing diethyl ether, the storage tank 5313 for storing diethyl ether is connected to a feed end of the syringe 522 through a material conveying pipe 521, diethyl ether in the storage tank 5313 is inputted into the syringe 522 according to a sample amount required for a system control test, and after a preset target value is reached, the diethyl ether is stopped being inputted into the syringe 522, and then, a power is applied to a push rod of the syringe 522 through a power unit 511, and inflammable and explosive substances in the syringe 522 are inputted into the test chamber 200.

Referring to fig. 7, in an embodiment, the inflammable and explosive material includes an explosive gas, the material conveying assembly 500 includes a gas distribution assembly 531, the gas distribution assembly 531 is provided with a gas outlet channel 5311, the gas outlet channel 5311 is communicated with the gas inlet 231 of the test chamber 200, the gas inlet end of the gas distribution assembly 531 is provided with at least one gas inlet channel 5312, each gas inlet channel 5312 is used for inputting an explosive gas, and the control assembly 400 is connected with the gas distribution assembly 531 and is used for controlling the gas outlet channel 5311 to be communicated with the at least one gas inlet channel 5312 so as to enable the corresponding explosive gas to be input into the test chamber 200.

The explosive gas includes, but is not limited to, explosive gas, inflammable gas, and a mixture of explosive gas, oxygen, air, and the like. Alternatively, the air distribution assembly 531 may be configured as an injector 522, and the air outlet channel 5311 is disposed at the discharge end of the injector 522 and is used for communicating with the air inlet 231 of the test chamber 200, and when the air distribution assembly 531 is used for inputting a plurality of explosive gases, the air inlet end of the air distribution assembly 531 is provided with a plurality of air inlet channels 5312, and the air distribution assembly 531 is connected to the storage tanks 5313 of the plurality of gases one to one through the plurality of air inlet channels 5312. Optionally, a plurality of air inlet channels 5312 arranged at the air inlet end of the air distribution assembly 531 may be connected in parallel, and the air inlet end of the air distribution assembly 531 is provided with a valve assembly 550 such as a flow control valve, so as to realize air distribution according to the ratio of the required test gas by controlling the amount of each explosive gas entering the test chamber 200.

To achieve temperature control, in an embodiment, the small-element hot-spot explosion test apparatus further includes a heating assembly 600, where the heating assembly 600 is disposed around the test chamber 200, and the control assembly 400 is electrically connected to the heating assembly 600, and is used to control the heating assembly 600 to heat until the temperature of the element 800 to be tested reaches a preset temperature threshold. The heating component 600 is controlled to heat by the control component 400 so as to control the test heating temperature and heating rate, and the temperature in the test cavity 200 is kept constant by controlling the heating component 600 to heat, so that the problems of inconvenient operation and low operation efficiency caused by single test environment temperature are solved.

The illustrated test chamber 200 is detachably installed in the accommodating space 111 of the outer chamber 110, and in an assembled state, the outer circumferential wall of the test chamber 200 and the inner circumferential wall of the outer chamber 110 are not in contact with each other. Optionally, to optimize the temperature control effect, the illustrated heating assembly 600 employs a flexible heating sheet, where the flexible heating sheet is installed between the test chamber 200 and the outer chamber 110, the flexible heating sheet is disposed around the test chamber 200 and is tightly attached to the outer peripheral wall of the test chamber 200, the test chamber 200 may specifically use a metal material or an alloy material combination suitable for practical use, and the control assembly 400 controls the heating sheet to heat the test chamber 200, so that the temperature in the test chamber 200 reaches and maintains at a preset temperature threshold, and when the temperature of the element 800 to be tested reaches the preset temperature threshold, the element 800 to be tested is turned on.

Referring to fig. 6, in an embodiment, a mounting bracket 320 is disposed in the test chamber 200, the mounting bracket 320 includes a connecting member 321, a rotating structure 322 and a swinging structure 323, the connecting member 321 is mounted in the test chamber 200, the rotating structure 322 is rotatably mounted on the connecting member 321, and the swinging structure 323 is used for mounting the temperature detecting component 310 and is rotatably mounted on the rotating structure 322, so as to drive the temperature detecting component 310 to move close to or away from the element 800 to be tested.

The temperature detection component 310 is movably installed in the test cavity 200 through the installation support 320, and the space between the temperature detection component 310 and the element 800 to be tested is adjusted through the cooperation of the rotating structure 322 and the swinging structure 323, so that the temperature detection component 310 can be ensured to be arranged as close to the element 800 to be tested as possible in the test process, the temperature detection component 310 is in the optimal detection position, the test error can be reduced, and the reliability of the test result is ensured.

Alternatively, the rotating structure 322 is rotatably installed on the connecting member 321, and one end of the rotating structure 322, which is close to the connecting member 321, is provided with a first rotating member 3311 for rotation about a first rotation axis by the first rotating member 3311; the one end that is close to the rotating structure 322 of swing structure 323 is provided with second rotation piece 3312, and swing structure 323 is connected with the rotating structure 322 rotation through second rotation piece 3312 for rotate around the second rotation axis, and first rotation axis and second rotation axis are crossing, and wherein first rotation axis and test chamber 200 central line are parallel to each other, and the second rotation axis sets up with first rotation axis mutually perpendicular, and first rotation axis and second rotation axis are interchangeable. The angle at which the first rotation axis and the second rotation axis intersect may be set according to the actual condition, or the rotation structure 322 and the swing structure 323 of the mounting bracket 320 may be replaced with a device provided with a direction adjustment structure such as a cardan shaft, which is not limited herein.

In the utility model, in the test process, if the element 800 to be tested can ignite the inflammable and explosive substances in the test cavity 200 after being electrified, the element 800 to be tested directly ignites the inflammable and explosive substances in the test cavity 200 after being electrified; if the element 800 to be tested cannot ignite the inflammable and explosive material in the test chamber 200 after being electrified, the inflammable and explosive material in the test chamber 200 needs to be consumed by remote detonation or the like.

In one embodiment, the small-element hot-spot explosion test device further comprises an ignition device 700, wherein the ignition device 700 is installed in the test cavity 200, and the control assembly 400 is connected with the ignition device 700 and is used for controlling the ignition device 700 to discharge after the temperature of the element 800 to be tested reaches the preset temperature threshold.

As a specific example, the ignition device 700 may be an igniter or other device capable of realizing thermal ignition, the small-element hot-spot explosion test device is further provided with a monitoring device such as a camera, the monitoring device is disposed towards the test chamber 200, the control assembly 400 is connected with the monitoring device, and is used for controlling the ignition device 700 to discharge or controlling the ignition device 700 to discharge by other electric control devices corresponding to the ignition device 700 in a manner of controlling the ignition device 700 to ignite inflammable and explosive substances in the test chamber 200 by electric sparks generated by the discharge of the ignition device 700 after the temperature of the element 800 detected by the temperature detection assembly 310 reaches a preset temperature threshold and is connected with the element 800 to be tested by acquiring a monitoring picture, so as to avoid the inflammable and explosive substances from leaking and affecting personnel safety and environmental pollution.

Referring to fig. 4, in an embodiment, the small-element hot-spot explosion testing apparatus further includes a sealing cover 220, where the sealing cover 220 is movably mounted on the outer cavity 110 between a sealing cover state and an open state, and a sealing member 221 is disposed on the sealing cover 220, and in the sealing cover state, the sealing member 221 abuts between the testing cavity 200 and the sealing cover 220.

It can be understood that the state in which the test chamber 200 is sealed with the sealing cap 220 is a sealing cap state, and the state in which the test chamber 200 is opened with the sealing cap 220 is an opening state. Alternatively, the seal cap 220 may be pivotally connected to the outer housing 110, and the seal 221 may be a top-seal rubber. In the capping state, the sealing member 221 is tightly combined with the test chamber 200, so that a completely sealed test space is formed in the test chamber 200, and the reliability of the explosion test is improved.

Further, the sealing member 221 is in an L-shaped step shape, and a rubber gasket is arranged on the sealing member 221 to further optimize the sealing effect, so that a double-closed space is formed among the test chamber 200, the test chamber 200 and the outer chamber body 110. Alternatively, the sealing member 221 may be provided around the sealing cover 220 as shown, and in particular, the sealing member 221 may be provided in a ring shape; or a plurality of sealing members 221 are provided, and a plurality of sealing members 221 are provided on the sealing cover 220 at intervals and around the sealing cover 220.

Optionally, an anti-explosion glass observation window is arranged on the sealing cover 220, and the observation window is fixedly connected to the sealing cover 220 in a gluing mode, a clamping mode and the like so as to observe the test condition in the test cavity 200.

In an embodiment, the small-element hot-spot explosion test device further comprises an air outlet pipeline 540, one end of the air outlet pipeline 540 is communicated with the air outlet 232 of the test cavity 200, a vacuum pump 541 is arranged on the air outlet pipeline 540, the control assembly 400 is connected with the air outlet pipeline 540 and the vacuum pump 541, and is used for controlling to close the air outlet pipeline 540 and controlling the vacuum pump 541 to work after receiving a starting signal so as to form vacuum inside the test cavity 200, specifically, after the element 800 to be tested is placed and the sealing cover 220 is sealed, the vacuum pump 541 is controlled to work until the pressure in the test cavity reaches a required pressure value, and after the test cavity 200 is determined to be in a vacuum environment, inflammable and explosive test is input.

The control assembly 400 is further configured to control the opening of the air outlet pipe 540 to exhaust the air in the test chamber 200 after receiving the stop signal. For venting the gases remaining after the test.

The specific implementation steps of the small-element thermal ignition explosion test device disclosed by the utility model are as follows:

After the element 800 to be tested is placed on the test platform 210 in the test chamber 200, the position of the temperature detecting component 310 is adjusted by the mounting bracket 320, so that the temperature detecting component 310 is close to the element 800 to be tested as much as possible, and then the sealing cover 220 is sealed. After the valve component 550 of the air distribution component 531 is closed, the vacuum pump 541 is controlled to work so as to extract air in the test cavity 200, after the vacuum is formed in the test cavity 200, the vacuum pump 541 is closed, the valve component 550 of the air distribution component 531 is opened, the types of inflammable and explosive substances and the volume percentages of various inflammable and explosive substances which are input into the test cavity 200 are controlled according to the preset target value, and the material conveying component 500 is controlled to be closed after the inflammable and explosive substances which are input into the test cavity 200 reach the preset target value and the air pressure in the test cavity 200 reaches the required requirement.

When a camera is provided, the camera is aimed at the viewing window to record the progress of the test in the test chamber 200.

After the gas in the test chamber 200 is fully mixed after standing for a period of time, starting a test by a control button of the explosion testing device, wherein the control assembly 400 is used for acquiring the temperature of the element 800 to be tested detected by the temperature detection assembly 310, and displaying the test progress and the temperature of the element 800 to be tested by a display screen; the control assembly 400 is further configured to record the temperature of the element 800 to be tested, and when the temperature of the element 800 to be tested reaches a preset temperature threshold, switch on the element 800 to be tested to check whether the inflammable and explosive material in the test chamber 200 can be detonated. If the temperature of the device 800 to be tested does not reach the preset temperature threshold, the heating assembly 600 is controlled to heat until the temperature of the device 800 to be tested reaches the preset temperature threshold, so as to observe whether explosion occurs during the temperature rising process or when the temperature reaches the preset temperature threshold.

If an explosion occurs in the test chamber 200, the heating unit 600 is turned off, and the remaining gas in the test chamber 200 is exhausted by opening the gas outlet pipe 540. If explosion does not occur in the test chamber 200, the ignition device 700 is controlled to discharge, and the electric spark generated by the discharge of the ignition device 700 ignites inflammable and explosive substances in the test chamber 200 to end the test process and consume the inflammable and explosive substances in the test chamber 200, and after the explosion is ended, the air outlet pipeline 540 is controlled to be opened to discharge residual gas in the test chamber 200.

In addition, if the temperature decreases due to the element 800 itself, such as damage to the element 800 under test during the test, or the temperature fails to reach the preset temperature threshold, 5 or more tests are performed by adding 5 or more samples of the element 800 under test.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (10)

1. A small-element thermal-ignition explosion test apparatus, comprising:

the outer cavity is internally provided with an accommodating space;

The test cavity is detachably arranged in the accommodating space, a test platform for placing the element to be tested is arranged in the test cavity, and the test platform is provided with an electric connection end which is used for being connected with a power supply;

the temperature detection component is movably arranged in the test cavity and is arranged towards the element to be tested and is used for detecting the temperature of the element to be tested;

The control component is electrically connected with the power connection end and the temperature detection component respectively, and is used for controlling the on-off of the power connection end and switching on the element to be detected when the temperature of the element to be detected reaches a preset temperature threshold value.

2. The small-element hot-ignition explosion test device according to claim 1, further comprising a material conveying assembly, wherein a discharge end of the material conveying assembly is connected with a feed inlet of the test cavity, a feed end of the material conveying assembly is used for being connected with inflammable and explosive substances and inputting the inflammable and explosive substances into the test cavity, and the control assembly is connected with the material conveying assembly and used for controlling on-off of the material conveying assembly and controlling the material conveying assembly to be closed after the inflammable and explosive substances input into the test cavity reach a preset target value.

3. The small-element thermal ignition explosion testing apparatus according to claim 2, wherein a power device is arranged on the material conveying assembly, and the control assembly is connected with the power device and used for driving the power device to apply power to the material conveying assembly so that inflammable and explosive materials can be input into the testing cavity.

4. The small-element thermal-ignition explosion testing apparatus according to claim 2, wherein the inflammable and explosive substance comprises an explosive gas and/or an inflammable liquid.

5. The small-element thermal ignition explosion test apparatus according to claim 2, wherein the inflammable and explosive material comprises explosive gas, the material conveying assembly comprises a gas distribution assembly, the gas distribution assembly is provided with gas outlet channels, the gas outlet channels are communicated with the gas inlets of the test cavities, the gas inlet ends of the gas distribution assembly are provided with at least one gas inlet channel, each gas inlet channel is used for inputting one explosive gas, and the control assembly is connected with the gas distribution assembly and used for controlling the gas outlet channels to be communicated with at least one gas inlet channel so that the corresponding explosive gas is input into the test cavities.

6. The small-element hot-ignition explosion testing apparatus according to claim 1, further comprising a heating assembly disposed around the testing cavity, wherein the control assembly is electrically connected to the heating assembly for controlling the heating assembly to heat until the temperature of the element to be tested reaches a preset temperature threshold.

7. The small-element thermal ignition explosion testing apparatus according to claim 1, wherein a mounting bracket is arranged in the testing cavity, the mounting bracket comprises a connecting piece, a rotating structure and a swinging structure, the connecting piece is installed in the testing cavity, the rotating structure is rotatably installed on the connecting piece, and the swinging structure is used for installing the temperature detection assembly and is rotatably installed on the rotating structure and used for driving the temperature detection assembly to move close to or move away from the element to be tested.

8. The small-element thermal ignition explosion testing apparatus according to claim 1, further comprising an ignition device mounted in the test chamber, wherein the control assembly is connected to the ignition device for controlling the ignition device to discharge after the temperature of the element to be tested reaches a preset temperature threshold.

9. The small-element thermal-ignition explosion testing apparatus according to claim 1, further comprising a sealing cover movably mounted on the outer cavity between a cover-closing state and an open state, the sealing cover being provided with a sealing member, the sealing member abutting between the testing cavity and the sealing cover in the cover-closing state.

10. The small-element thermal ignition explosion test apparatus according to any one of claims 1-9, further comprising an air outlet pipeline, wherein one end of the air outlet pipeline is communicated with an air outlet of the test cavity, a vacuum pump is arranged on the air outlet pipeline, and the control assembly is connected with the air outlet pipeline and the vacuum pump and is used for controlling the air outlet pipeline to be closed and controlling the vacuum pump to work after receiving a starting signal; and the device is also used for controlling to open the air outlet pipeline after receiving the stop signal so as to discharge the air in the test cavity.