Miniature high-temperature-resistant data recorder protection device

Abstract

The invention discloses a small high-temperature-resistant data recorder protection device, and the device comprises a phase change energy storage housing which wraps a data recorder; the phase change energy storage shell is wrapped with the aerogel layer, and the aerogel layer is used for sealing, heat preservation and fire prevention; the thermal insulation layer is arranged outside the aerogel layer in a wrapping manner and is used for thermal insulation; the waterproof and explosion-proof shell wraps the heat insulation layer and is arranged outside the heat insulation layer at a certain distance, and the waterproof and explosion-proof shell serves as a protective shell; and the heat-proof coating is coated on the outer surface of the waterproof and explosion-proof shell, so that the fire resistance is enhanced. The data recorder can bear high temperature, high pressure and long-time soaking when fire disasters occur around the data recorder, and storage information is well protected.

Description

Technical Field

[0001] The invention relates to the technical field of composite high temperature resistant heat protection, in particular to a small high temperature resistant data recorder protection device. Background Art

[0002] The data recorder protection device has a circuit board and chip data storage device inside, which can be used to record data from various equipment such as aircraft, ships, cars, and test instruments. In the event of a fire around the equipment, the protection device is required to withstand high temperature, high pressure, and long-term immersion.

[0003] The current data logger protection devices mainly use heat-proof and heat-insulating measures to protect the internal storage devices. However, the heat-proof and heat-insulating measures can only delay the heat transfer to the storage devices, and cannot actively absorb this part of the heat. Therefore, the high-temperature resistance of the current products is limited and cannot meet the disaster recovery indicators in the reference standard EUROCAE ED-155:2009, which are: 1100℃15min, 950℃20min and 260℃120min.

[0004] Therefore, it is urgent to design a small high-temperature resistant data recorder protection device that can effectively protect the stored information in fire accidents. Summary of the invention

[0005] The purpose of the present invention is to provide a small high temperature resistant data recorder protection device, which can greatly improve the high temperature resistance of the product.

[0006] To achieve the above object, the present invention provides a small high temperature resistant data recorder protection device, comprising:

[0007] A phase change energy storage housing is wrapped around the data recorder;

[0008] An aerogel layer, wrapped around the phase change energy storage shell, is used for sealing, heat preservation and fire prevention;

[0009] A heat insulation layer, disposed outside the aerogel layer and used for heat insulation;

[0010] A waterproof and explosion-proof shell, which wraps and is arranged outside the thermal insulation layer at a certain distance, serving as a protective shell;

[0011] The heat-resistant coating is applied to the outer surface of the waterproof and explosion-proof housing to enhance the fire-resistant performance.

[0012] Optionally, the phase-change energy storage shell includes a first phase-change energy storage shell and a second phase-change energy storage shell, and the first phase-change energy storage shell and the second phase-change energy storage shell have the same structure and are symmetrically arranged adjacent to each other;

[0013] The surfaces of the first phase-change energy storage housing and the second phase-change energy storage housing are both provided with a circular groove, and the two circular grooves are arranged opposite to each other to form a closed space, and the closed space accommodates the data recorder;

[0014] The first phase-change energy storage housing and the second phase-change energy storage housing are fixed by using heat-resistant sealant.

[0015] Optionally, the phase-change energy storage shell is cylindrical, and the first phase-change energy storage shell and the second phase-change energy storage shell are both hollow structures, and the interiors thereof are filled with phase-change heat-absorbing materials to form a phase-change heat-absorbing layer;

[0016] The upper wall of the first phase-change energy storage housing is provided with an upper filling port for filling the phase-change heat-absorbing material;

[0017] The lower wall of the second phase-change energy storage shell is provided with a lower filling port for filling the phase-change heat-absorbing material.

[0018] Optionally, the phase-change endothermic material is CaCl2·6H2O.

[0019] Optionally, the aerogel layer is cylindrical and comprises:

[0020] An aerogel upper cover, covering the upper surface of the phase change energy storage shell;

[0021] An aerogel outer ring, wrapped around the outer surface of the side wall of the phase change energy storage shell;

[0022] An aerogel lower cover, covering the lower surface of the phase change energy storage shell;

[0023] The aerogel upper cover is connected to the top of the aerogel outer ring by a heat-proof sealant, and the aerogel lower cover is connected to the bottom of the aerogel outer ring by a heat-proof sealant;

[0024] Wherein, the material of the aerogel layer is silicon dioxide aerogel.

[0025] Optionally, the thermal insulation layer comprises:

[0026] The heat-insulating shell is a cylindrical shell with openings at the top and bottom, and is sleeved on the outside of the aerogel layer;

[0027] The thermal insulation cover is divided into an upper thermal insulation cover and a lower thermal insulation cover;

[0028] The upper insulation cover is fixed to the top of the insulation shell to cover the top surface of the aerogel upper cover that is not wrapped by the insulation shell; the lower insulation cover is fixed to the bottom of the insulation shell to cover the bottom surface of the aerogel lower cover that is not wrapped by the insulation shell.

[0029] Optionally, the waterproof and explosion-proof housing comprises:

[0030] A waterproof housing base, comprising a base bottom wall and a base side wall, wherein the base bottom wall is arranged below the heat insulation layer, and the base side wall is arranged around the outside of the heat insulation layer and forms a gap space with a distance of 5 mm between the base side wall and the outer wall of the heat insulation layer;

[0031] The waterproof housing upper cover is arranged on the upper part of the heat insulating layer, with a gap between it and the top of the heat insulating layer, and is fixedly connected to the waterproof housing base at the opening;

[0032] A waterproof connector, arranged on the side wall of the base of the waterproof housing, connected to the data recorder circuit, and used for transmitting data externally;

[0033] The sealing ring is arranged at the contact position between the waterproof shell base and the waterproof shell upper cover.

[0034] Optionally, a recessed structure is provided on a side of the upper heat-insulating cover away from the data recorder, and an interface circuit board is provided in the recessed structure;

[0035] A side of the interface circuit board close to the waterproof connector is connected to the waterproof connector via a cable.

[0036] Optionally, an FPC flexible board is provided in the gap space between the waterproof and explosion-proof housing and the heat insulation layer;

[0037] The lower end of the FPC flexible board is connected to the data recorder circuit, and the upper end thereof is connected to the circuit on one side of the interface circuit board away from the waterproof connector, so as to transfer the data stored in the data recorder to the interface circuit board.

[0038] Optionally, the heat-resistant coating adopts a thin steel structure fire-resistant coating, which is composed of amino resin, polyphosphate amine, melamine and pentaerythritol; wherein the thickness of the heat-resistant coating is 2 mm.

[0039] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0040] 1. The present invention adopts multi-layer heat protection technology. By coating a heat-proof coating, filling a heat-insulating aerogel outside the phase change energy storage shell, and arranging the storage chip in the phase change heat absorption layer, on the one hand, the thermal conductivity on the heat transfer path is reduced and the heat transfer speed is slowed down; on the other hand, the phase change material can absorb a large amount of heat during the phase change, thereby protecting the data recorder from being damaged in high temperature environments such as fire.

[0041] 2. The present invention adopts the phase change material temperature rise heat absorption technology and selects CaCl2·6H2O as the phase change material. On the one hand, the material has high density, high phase change enthalpy value per unit volume, and good phase change energy storage characteristics; on the other hand, the temperature rise process will dehydrate, and the boiling point, vaporization heat, and specific heat capacity are more suitable for vehicle-mounted working conditions. Therefore, adding CaCl2·6H2O to the phase change heat absorption layer of the data recorder can effectively control the temperature of the storage chip used in the data recorder. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a structural schematic diagram of the present invention;

[0043] Figure 2 is a schematic diagram of a phase change heat absorption layer of the present invention;

[0044] Figure 3 is a schematic diagram of an aerogel layer and a thermal insulation layer of the present invention;

[0045] Figure 4 It is a schematic diagram of the waterproof and explosion-proof housing of the present invention. DETAILED DESCRIPTION

[0046] The following will be combined with the attached Figures 1 to 4 , the technical content, structural features, objectives achieved and effects of the present invention are described in detail through preferred embodiments.

[0047] It should be noted that the drawings are in a very simplified form and use non-precise proportions. They are only used to conveniently and clearly assist in explaining the embodiments of the present invention, and are not used to limit the conditions for the implementation of the present invention. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention.

[0048] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] The present invention provides a small high temperature resistant data recorder protection device. In this embodiment, the data recorder can use a storage chip 1 to store driving data of equipment such as aircraft, ships, and automobiles. Of course, in other preferred embodiments, the data recorder can also use other storage devices.

[0051] like Figure 1 As shown, the high temperature resistant data recorder protection device includes: a phase change energy storage shell 3, which is wrapped around the outside of the storage chip 1 and is used to directly protect the storage chip 1. The phase change energy storage shell 3 contains a phase change heat absorption layer inside, which is used to absorb the heat generated by the storage chip 1 and the heat conducted from the outside; an aerogel layer, which is wrapped around the outside of the phase change energy storage shell 3, and is used for sealing, heat preservation and fire prevention; a heat insulation layer, which is coated and arranged outside the aerogel layer, and is used for heat insulation; a waterproof and explosion-proof shell, which is wrapped and arranged outside the heat insulation layer at a certain distance, serves as the shell of the protection device, and realizes the functions of waterproof, anti-extrusion, anti-explosion, and anti-sharp puncture; a heat-proof coating 15, which is coated on the outer surface of the waterproof and explosion-proof shell, can enhance the fire resistance of the protection device.

[0052] The protected storage chip 1 is generally a standard SSD card (ie, a type of solid state drive), with an operating temperature of -40°C to +85°C and a storage temperature of -40°C to +100°C.

[0053] Among them, based on the design principle that the volume of a cylinder is larger than that of a cuboid under the same heat exchange area, the phase change energy storage shell 3 is preferably designed to be cylindrical. The phase change energy storage shell 3 includes a first phase change energy storage shell 31 and a second phase change energy storage shell 32 of the same structural form, and the two phase change energy storage shells are symmetrically arranged adjacent to each other up and down. The outer diameter Φ1 of each phase change energy storage shell is 60mm and the height is 12.5mm. A circular groove is provided on the surface of each phase change energy storage shell, and the two circular grooves are arranged oppositely, and the inner diameter Φ2 of the circular groove is 40mm and the depth is 2.5mm. The intermediate interface of the first phase change energy storage shell 31 and the second phase change energy storage shell 32 is fixed with a heat-proof sealant. Therefore, a closed space with a bottom diameter of 40mm and a height of 5mm is formed in the groove between the first phase change energy storage shell 31 and the second phase change energy storage shell 32, and the closed space is used to accommodate the storage chip 1.

[0054] Wherein, the first phase-change energy storage housing 31 and the second phase-change energy storage housing 32 are both hollow structures. Figure 2 As shown, the upper surface and the lower surface of the phase change energy storage shell 3, that is, the upper wall of the first phase change energy storage shell 31 and the lower wall of the second phase change energy storage shell 32, are provided with an upper filling port and a lower filling port with a diameter Φ3 of 4 mm, which are used to fill the phase change heat absorption layer into the hollow structure. The phase change heat absorption layer is mainly filled with the phase change heat absorption material 2.

[0055] The phase change material 2 has a density of 2.15 g / cm 3 , CaCl2·6H2O (calcium chloride hexahydrate) material with a phase change enthalpy of 99.1 J / g. Because it has the characteristics of high specific heat capacity and high latent heat of phase change, and can further vaporize and absorb heat when dehydrated at high temperature, it can absorb heat during phase change and take away the heat on the protection device.

[0056] In a specific embodiment of the present invention, the phase-change heat absorption layer is formed by the following method: 140g of the phase-change material 2 is divided into equal amounts, and then filled into the first phase-change energy storage shell 31 and the second phase-change energy storage shell 32 respectively, and then the water-absorbing resin SAP particles are injected, so that the phase-change material injected into the first phase-change energy storage shell 31 and the second phase-change energy storage shell 32 through the two injection ports respectively forms a gel, which is convenient for packaging; finally, the two injection ports are sealed with 3M tape. Among them, after the phase-change material 2 is vaporized in a high-temperature environment, the air pressure in the phase-change energy storage shell 3 will increase, and the pressure will be released through the two injection ports. When the pressure is released, the gas will push open the 3M tape at the two injection ports and be released along the outer wall of the phase-change energy storage shell 3.

[0057] Preferably, in order to ensure the rigidity, sealing and corrosion resistance of the phase change energy storage housing 3, the phase change energy storage housing 3 is a stainless steel welded part.

[0058] The aerogel layer is cylindrical, and includes: an aerogel upper cover 4, which covers the upper surface of the phase change energy storage shell 3; an aerogel outer ring 5, which is wrapped around the outer surface of the side wall of the phase change energy storage shell 3, that is, the outside of the middle cylindrical surface; and an aerogel lower cover 6, which covers the lower surface of the phase change energy storage shell 3. The aerogel upper cover 4, the aerogel outer ring 5 and the aerogel lower cover 6 are sealed by heat-proof sealant, that is, the aerogel upper cover 4 is connected to the top of the aerogel outer ring 5 by heat-proof sealant, and the aerogel lower cover 6 is connected to the bottom of the aerogel outer ring 5 by heat-proof sealant.

[0059] Preferably, in order to enhance the thermal insulation performance of the aerogel layer, the thickness thereof is set to 10 mm, that is, the thicknesses of the aerogel upper cover 4, the aerogel outer ring 5 and the aerogel lower cover 6 are all 10 mm.

[0060] Preferably, the material of the aerogel layer is silicon dioxide aerogel, and the thermal conductivity of the silicon dioxide aerogel at room temperature is about 0.02w / mk.

[0061] Through the above-mentioned design of the aerogel layer, the aerogel layer is not easy to crack when expanding at high temperature, and has a better sealing effect; in addition, due to the smaller thermal conductivity coefficient, it has better thermal insulation and fire resistance.

[0062] Among them, Figure 3 As shown, the thermal insulation layer comprises: a thermal insulation shell 7, which is a cylindrical shell that is through-through (i.e., openings are provided at the top and the bottom), and is sleeved on the outside of the aerogel layer; a thermal insulation cover 8, which is divided into an upper thermal insulation cover 81 and a lower thermal insulation cover 82; the upper thermal insulation cover 81 is fixed to the top of the thermal insulation shell 7 by screws, and is used to cover the top surface of the aerogel upper cover 4 that is not wrapped by the thermal insulation shell 7; the lower thermal insulation cover 82 is fixed to the bottom of the thermal insulation shell 7 by screws, and is used to cover the bottom surface of the aerogel lower cover 6 that is not wrapped by the thermal insulation shell 7.

[0063] Preferably, the heat-insulating outer shell 7 and the heat-insulating cover 8 are both made of stainless steel to ensure rigidity and corrosion resistance.

[0064] Among them, Figure 4 As shown, the waterproof and explosion-proof housing includes: a waterproof housing base 12, which includes a base bottom wall and a base side wall, the base bottom wall is arranged below the thermal insulation layer, and the base side wall is arranged around the outside of the thermal insulation layer, and a gap is provided between the base side wall and the outer wall of the thermal insulation layer; a waterproof housing upper cover 13, which is arranged on the upper part of the thermal insulation layer, a gap is provided between the base side wall and the top of the thermal insulation layer, and the waterproof housing base 12 is fixed with screws at the opening; a waterproof connector 11, which is arranged on the side wall of the waterproof housing base 12, is connected to the storage chip 1 circuit, and is used to transmit data to the outside; a sealing ring 14, which is arranged at the contact between the waterproof housing base 12 and the waterproof housing upper cover 13, in order to form a better sealing effect, a sealing groove can be opened on the waterproof housing base 12 and / or the waterproof housing upper cover 13 to embed and fix the sealing ring 14.

[0065] Furthermore, the waterproof housing base 12 and the waterproof housing upper cover 13 are both made of stainless steel to ensure rigidity and corrosion resistance. Furthermore, the waterproof connector 11 is a wall-penetrating socket with a watertight function, which can be connected to an external circuit. Furthermore, in a specific embodiment of the present invention, the groove depth of the sealing groove is set to 2 mm, the groove width is set to 3.8 mm, and the sealing ring with a filling wire diameter of 2.65 mm.

[0066] Specifically, the waterproof and explosion-proof housing is separated from the insulation layer, that is, a gap space with a distance of 5 mm is formed between the sides and the top of the waterproof and explosion-proof housing and the insulation layer, so as to utilize the air in the gap space to further isolate the waterproof housing base 12 from conducting heat inward.

[0067] Furthermore, a concave structure is provided on a side of the upper heat-insulating cover 81 away from the memory chip 1 .

[0068] An interface circuit board 10 is provided in the recessed structure of the upper heat-insulating cover 81. The interface circuit board 10 is connected to the waterproof connector 11 at one side thereof close to the waterproof connector 11 through a cable to realize the conversion of SATA interface (i.e., a serial hardware driver interface) data to USB interface (i.e., a universal serial bus interface) data.

[0069] An FPC (flexible printed circuit board) 9 is provided in the gap space between the waterproof and explosion-proof housing and the heat insulation layer. The lower end of the FPC 9 is connected to the circuit of the memory chip 1, and the other end is connected to the circuit of the interface circuit board 10 away from the waterproof connector 11, so as to realize the circuit connection between the memory chip 1 and the interface circuit board 10, thereby transferring the data stored in the memory chip 1 to the interface circuit board 10.

[0070] The heat-resistant coating 15 is a thin steel structure fire-resistant coating, which is mainly composed of amino resin, polyphosphoric acid amine, melamine and pentaerythritol. The fire-resistant coating has low thermal conductivity and decomposes a large amount of self-extinguishing gas when heated, which can inhibit flame combustion. In a specific embodiment of the present invention, the thickness of the heat-resistant coating 15 is 2 mm.

[0071] Furthermore, the small high temperature resistant data recorder protection device provided by the present invention is cylindrical, and its dimensions are: diameter 110mm, height 70mm, which can meet the needs of miniaturization. The weight of the phase change material CaCl2·6H2O filled inside is 140g, and its phase change absorption heat, water vapor vaporization absorption heat after dehydration, and temperature rise specific heat absorption heat are 92485J. By calculating the product size, the heating area of ​​the protection device is 24178mm 2 The effective thermal conductivity area of ​​aerogel is 13816mm 2 , the thermal conductivity of aerogel Kr = 0.05w / mk. Without considering the effect of heat-resistant coating and air insulation, the high temperature resistance time of the protective device is as follows:

[0072] When the flame temperature is 1100℃, the heat conduction power is 69.1w and the fire resistance time is 22.3min;

[0073] When the flame temperature is 950℃, the heat conduction power is 58.7w and the fire resistance time is 26.2min;

[0074] When the flame temperature is 260℃, the thermal conductivity is 11.1W and the fire resistance time is 138.9min.

[0075] In summary, the protection device can meet the fire resistance and disaster tolerance index requirements of 1100℃15min, 950℃20min and 260℃120min.

[0076] In summary, the small-sized high temperature resistant data recorder protection device provided by the present invention can withstand high temperature and high pressure as well as long-term immersion when a fire or the like occurs around the data recorder.

[0077] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the invention. After reading the above content, it will be obvious to those skilled in the art for various modifications and substitutions of the present invention. Therefore, the protection scope of the present invention should be limited by the attached claims.

Claims

1. A small high temperature resistant data recorder protection device, characterized in that: Include: A phase change energy storage housing (3) wrapped around the data recorder; An aerogel layer, wrapped around the phase change energy storage housing (3), for sealing, heat preservation and fire prevention; A heat insulation layer, disposed outside the aerogel layer and used for heat insulation; A waterproof and explosion-proof shell, which wraps and is arranged outside the thermal insulation layer at a certain distance, serving as a protective shell; A heat-resistant coating (15) is applied to the outer surface of the waterproof and explosion-proof housing to enhance fire resistance.

2. The small high temperature resistant data recorder protection device according to claim 1, characterized in that: The phase-change energy storage housing (3) comprises a first phase-change energy storage housing (31) and a second phase-change energy storage housing (32), wherein the first phase-change energy storage housing (31) and the second phase-change energy storage housing (32) have the same structure and are arranged adjacent to each other symmetrically; The surfaces of the first phase-change energy storage housing (31) and the second phase-change energy storage housing (32) are both provided with a circular groove, and the two circular grooves are arranged opposite to each other to form a closed space, and the closed space contains a data recorder; The first phase-change energy storage housing (31) and the second phase-change energy storage housing (32) are fixed with heat-resistant sealing adhesive.

3. The small high temperature resistant data recorder protection device as claimed in claim 2, characterized in that: The phase-change energy storage shell (3) is cylindrical, and the first phase-change energy storage shell (31) and the second phase-change energy storage shell (32) are both hollow structures, and the interiors thereof are filled with a phase-change heat-absorbing material (2) to form a phase-change heat-absorbing layer; The upper wall of the first phase-change energy storage housing (31) is provided with an upper filling port for filling the phase-change heat-absorbing material (2); The lower wall of the second phase-change energy storage housing (32) is provided with a lower filling port for filling the phase-change heat-absorbing material (2).

4. The small high temperature resistant data recorder protection device as claimed in claim 3, characterized in that: The phase-change heat-absorbing material (2) is CaCl2·6H2O.

5. The small high temperature resistant data recorder protection device according to claim 1, characterized in that: The aerogel layer is cylindrical and comprises: an aerogel upper cover (4), covering the upper surface of the phase change energy storage housing (3); An aerogel outer ring (5) wrapped around the outer surface of the side wall of the phase change energy storage housing (3); An aerogel lower cover (6) covering the lower surface of the phase change energy storage housing (3); The aerogel upper cover (4) is connected to the top of the aerogel outer ring (5) by means of a heat-proof sealant, and the aerogel lower cover (6) is connected to the bottom of the aerogel outer ring (5) by means of a heat-proof sealant; Wherein, the material of the aerogel layer is silicon dioxide aerogel.

6. The small high temperature resistant data recorder protection device as claimed in claim 5, characterized in that: The thermal insulation layer comprises: The heat-insulating outer shell (7) is a cylindrical outer shell with openings at the top and the bottom, and is sleeved on the outside of the aerogel layer; A heat-insulating cover (8), which is divided into an upper heat-insulating cover (81) and a lower heat-insulating cover (82); The upper insulation cover (81) is fixed to the top of the insulation shell (7) and is used to cover the top surface of the aerogel upper cover (4) that is not wrapped by the insulation shell (7); the lower insulation cover (82) is fixed to the bottom of the insulation shell (7) and is used to cover the bottom surface of the aerogel lower cover (6) that is not wrapped by the insulation shell (7).

7. The small high temperature resistant data recorder protection device according to claim 6, characterized in that: The waterproof and explosion-proof housing comprises: A waterproof housing base (12), comprising a base bottom wall and a base side wall, wherein the base bottom wall is arranged below the heat insulation layer, and the base side wall is arranged around the outside of the heat insulation layer and forms a gap space with a distance of 5 mm between the base side wall and the outer wall of the heat insulation layer; A waterproof housing upper cover (13), which is arranged on the upper part of the heat insulation layer, has a gap between it and the top of the heat insulation layer, and is fixedly connected to the waterproof housing base (12) at the opening; A waterproof connector (11), arranged on a side wall of the waterproof housing base (12), connected to a data recorder circuit, and used for transmitting data externally; A sealing ring (14) is arranged at the contact point between the waterproof housing base (12) and the waterproof housing upper cover (13).

8. The small high temperature resistant data recorder protection device as claimed in claim 7, characterized in that: A recessed structure is provided on a side of the upper heat-insulating cover (81) away from the data recorder, and an interface circuit board (10) is provided in the recessed structure; A side of the interface circuit board (10) close to the waterproof connector (11) is connected to the waterproof connector (11) via a cable.

9. The small high temperature resistant data recorder protection device as claimed in claim 8, characterized in that: An FPC flexible board (9) is provided in the gap space between the waterproof and explosion-proof housing and the heat insulation layer; The lower end of the FPC flexible board (9) is connected to the data recorder circuit, and the upper end thereof is connected to a circuit on one side of the interface circuit board (10) away from the waterproof connector (11), so as to transfer the data stored in the data recorder to the interface circuit board (10).

10. The small high temperature resistant data recorder protection device according to claim 1, characterized in that: The heat-resistant coating (15) adopts a thin steel structure fire-resistant coating, which is composed of amino resin, polyphosphate amine, melamine and pentaerythritol; wherein the thickness of the heat-resistant coating (15) is 2 mm.

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