Onboard chemical oxygen generator with heat insulation structure

Abstract

The utility model relates to the field of chemical oxygen generation and heat insulation, in particular to an onboard chemical oxygen generator with a heat insulation structure, which comprises a starting mechanism, a starting base detachably connected with the lower end of the starting mechanism, an upper connecting piece, a lower connecting piece and a heat insulation structure, the inner circumferential surface of the top end of the inner tank body is fixed with the outer circumferential surface of the lower end of the upper connecting piece; the upper end of the outer circumferential surface of the lower connecting piece is fixed with the inner circumferential surface of the bottom end of the inner tank body; due to the fact that the outer tank body is adopted and the annular space is formed between the outer tank body and the inner tank body, the problem that the temperature of the outer surface of the inner tank body is too high due to the fact that heat is generated in the inner tank body is effectively solved, and the temperature of the outer tank body meets the standard due to the fact that the static air layer in the annular space between the inner tank body and the outer tank body is low in heat conductivity. Meanwhile, air heat insulation is adopted in the annulus, so that the overall weight is reduced, and the requirement of light-weight products is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of chemical oxygen insulation, specifically relates to a chemical oxygen generator with heat insulation structure for airborne. BACKGROUND

[0002] Chemical oxygen production method is the earliest and most widely used oxygen production technology, especially the most representative thermal decomposition of chlorate oxygen candle. The thermal decomposition method of chlorate oxygen candle is mainly sodium chlorate, metal powder as fuel, adding a certain amount of catalyst, chlorine inhibitor, binder and the like, after dry mixing, wet mixing and pressing. When using, through mechanical impact or electric starting, after ignition, oxygen can be continuously burned and released. Oxygen candle has the advantages of small size, light weight, fast oxygen production, high oxygen content, small influence of external environment, easy storage and carrying, etc. and is widely used in mines, submarines and spacecraft. However, a large amount of heat will be generated during the use of oxygen candle, and the temperature can reach above 450 DEG C. According to the specification of HB8475-2015 civil aircraft chemical oxygen generator, when the ambient temperature is 24 DEG C ± 3 DEG C, the surface temperature of the chemical oxygen generator shell shall not exceed 286 DEG C. Therefore, in the miniaturization process of the chemical oxygen generator device, the heat insulation performance of the device needs to be improved. Based on this, the utility model designs a double-layer heat insulation structure of airborne chemical oxygen generator to meet the requirement that the surface temperature of the shell during use of the chemical oxygen generator is within the standard specification. SUMMARY

[0003] The present application provides a chemical oxygen generator with heat insulation structure for airborne to solve the problem of high shell surface temperature in the background art.

[0004] The technical problem solved by the utility model can be solved by the following technical solutions:

[0005] A chemical oxygen generator with heat insulation structure for airborne, comprising a starting mechanism and a starting base detachably connected to the lower end of the starting mechanism, further comprising:

[0006] An upper connecting piece, a base connecting hole is formed in the center of the upper connecting piece, and the starting base is detachably connected to the base connecting hole of the upper connecting piece;

[0007] An inner tank body, the inner circumferential surface of the top end of the inner tank body is fixed to the outer circumferential surface of the lower end of the upper connecting piece;

[0008] Ignition agent and oxygen candle, the ignition agent and oxygen candle are filled in the inner tank body respectively, and the oxygen candle has a columnar hole at the top end, and the ignition agent is filled in the columnar hole;

[0009] Filtering agent, the filtering agent is filled in the inner tank body and located at the bottom end of the oxygen candle, and a contact surface is formed between the upper surface of the filtering agent and the lower surface of the oxygen candle;

[0010] Lower connecting piece, outer circumferential surface upper end of the lower connecting piece is fixed with inner tank body bottom end inner circumferential surface, and the lower connecting piece is located below filtering medicament;

[0011] Air outlet, the lower connecting piece center is provided with air outlet hole, and the air outlet is detachably connected in the air outlet hole;

[0012] Thermal insulation part, the thermal insulation part is detachably connected on the outer circumferential surface of the upper connecting piece and the lower connecting piece, and the inner tank body is located in the thermal insulation part.

[0013] Further, the upper connecting ring is formed on the outer circumferential surface of the starting base, the outer circumferential surface of the upper connecting ring is fixed with the thermal insulation part, and the top end of the upper connecting piece is in contact with the lower surface of the upper connecting ring.

[0014] Further, the sealing groove is formed on the lower surface of the upper connecting ring, the sealing ring is embedded in the sealing groove, and the sealing ring is also in contact with the top end of the upper connecting piece.

[0015] Further, the lower connecting ring is formed on the outer circumferential surface of the bottom end of the lower connecting piece, and the outer circumferential surface of the lower connecting ring is fixed with the thermal insulation part.

[0016] Further, the thermal insulation part is a cylindrical structure of the outer tank body, the top end of the outer tank body is fixed with the starting base, the bottom end of the outer tank body is fixed with the lower connecting piece, and the annular space is formed between the outer tank body and the inner tank body.

[0017] Further, the air outlet is an L-shaped tubular structure, one end of the air outlet is provided with external thread, the other end of the air outlet is provided with anti-skid terrace, and the air outlet is threadedly connected with the air outlet hole of the lower connecting piece through the external thread.

[0018] Further, the inner tank body and the outer tank body are made of stainless steel.

[0019] Further, the air outlet is an L-shaped tubular structure.

[0020] Further, the upper connecting piece is provided with the upper stopper of the inner tank body, and the top end of the inner tank body is connected with the upper stopper of the upper connecting piece.

[0021] The utility model discloses the beneficial effect is: because adopted outer tank body, through the annular space formed between the inner tank body, effectively solved the problem that the inner tank body surface temperature is too high because of the heat generated in the inner tank body, further realized through the lower thermal conductivity of the annular space static air layer between the inner tank body and the outer tank body, make the outer tank body temperature meet the standard, simultaneously, the air insulation in the annular space makes the overall weight reduce, meets the lightweight product requirement. DRAWINGS

[0022] The utility model is further explained in connection with the drawings and examples.

[0023] Figure 1It is the structure schematic view of the utility model.

[0024] Figure 2 It is the inner tank body and upper connecting piece connection schematic view of the utility model.

[0025] Figure 3 It is the outer tank body and upper connecting ring connection schematic view of the utility model.

[0026] Figure 4 It is the lower connecting ring and inner tank body and outer tank body connection schematic view of the utility model.

[0027] In the drawing: 1-starting mechanism;2-starting base;3-upper connecting piece;4-inner tank body;5-ignition agent;6-oxygen candle;7-filtering agent;8-lower connecting piece;9-gas outlet;10-upper connecting ring;12-sealing ring;13-lower connecting ring;14-outer tank body. DETAILED DESCRIPTION

[0028] Example 1:

[0029] Refer to Figures 1-2 It is the structure schematic view of the utility model embodiment 1, a kind of airborne chemical oxygen generator with heat insulation structure, including starting mechanism 1, and the starting base 2 of detachable connection in the lower end of starting mechanism 1, further include:

[0030] Upper connecting piece 3, the bottom seat connecting hole is opened in the center of the upper connecting piece 3, and the starting base 2 is detachably connected in the bottom seat connecting hole of upper connecting piece 3;

[0031] Inner tank body 4, the inner circumferential surface of the top end of the inner tank body 4 is fixed with the outer circumferential surface of the lower end of upper connecting piece 3;

[0032] Ignition agent 5 and oxygen candle 6, the ignition agent 5 and oxygen candle 6 are filled in the inner tank body 4 respectively, and the top end of oxygen candle 6 has columnar hole, and the ignition agent 5 is filled in columnar hole;

[0033] Filtering agent 7, the filtering agent 7 is filled in the inner tank body 4, and is located at the bottom end of oxygen candle 6, and the upper surface of filtering agent 7 and the lower surface of oxygen candle 6 form contact surface;

[0034] Lower connecting piece 8, the outer circumferential surface upper end of the lower connecting piece 8 is fixed with the inner circumferential surface of the bottom end of inner tank body 4, and the lower connecting piece 8 is located below filtering agent 7;

[0035] Gas outlet 9, the center of the lower connecting piece 8 is opened with gas hole, and the gas outlet 9 is detachably connected in gas hole;

[0036] Heat insulation part, the heat insulation part is detachably connected in the outer circumferential surface of upper connecting piece 3 and lower connecting piece 8, and the inner tank body 4 is located in heat insulation part.

[0037] The upper connecting piece 3 is provided with an inner tank upper stopper, and the top end of the inner tank 4 is connected with the inner tank upper stopper of the upper connecting piece 3.

[0038] In actual use, the top end of the inner tank 4 is assembled with the upper connecting piece 3, and the outer edge of the top end of the inner tank 4 is laser welded with the upper connecting piece 3, then the oxygen candle 6 is coaxial with the bottom seat connecting hole at the center hole of the top end of the oxygen candle 6, then the filter medicament 7 is filled in the inner tank 4 and at the lower end of the oxygen candle 6, after the filling is completed, the lower connecting piece 8 is inserted into the bottom end of the inner tank 4, and the outer edge of the bottom end of the inner tank 4 is laser welded with the lower connecting piece 8, then the ignition agent 5 is filled into the center hole of the oxygen candle 6, then the heat insulation part is sleeved outside the inner tank 4 and connected with the lower connecting piece 8, then the starting bottom seat 2 is screwed with the starting bottom seat connecting hole of the lower connecting piece 8, at the same time, the heat insulation part is connected with the starting bottom seat 2, so that the inner tank 4 is centered in the heat insulation part, then the starting mechanism is assembled in the starting bottom seat 2, at the same time, the air outlet nozzle 9 is connected in the air outlet hole, and the assembly is completed.

[0039] The starting mechanism 1 is used with the starting bottom seat 2, the ignition cap at the bottom end of the starting bottom seat is hit by the starting mechanism 1 to ignite the ignition agent 5, the ignition agent 5 ignites the oxygen candle 6 to generate heat, at the same time, the gas is discharged through the air outlet nozzle 9, the surface temperature of the inner tank 4 is raised by the generated heat, and the temperature of the inner tank 4 will not escape when passing through the heat insulation part, so that the outer surface temperature of the heat insulation part is within the specified temperature range.

[0040] The upper connecting piece 3 is provided with an inner tank upper stopper, and the top end of the inner tank 4 is connected with the inner tank upper stopper of the upper connecting piece 3.

[0041] Example 2:

[0042] Referring to Figures 1-2 The difference of the embodiment is that the outer circumferential surface of the starting bottom seat 2 is provided with an upper connecting ring 10, the outer circumferential surface of the upper connecting ring 10 is fixed with the heat insulation part, and the top end of the upper connecting piece 3 is in contact with the lower surface of the upper connecting ring 10.

[0043] In actual use, the outer diameter of the upper connecting ring 10 in the embodiment is greater than the outer diameter of the upper connecting piece 3, so that the heat insulation part is connected with the upper connecting ring 10, so that the inner tank 4 is centered in the heat insulation part, and the distance between the outer circumferential surface of the top end of the inner tank 4 and the heat insulation part is prevented from being the same.

[0044] Example 3:

[0045] Referring to Figure 1The difference in this embodiment is that: a sealing groove is opened on the lower surface of the upper connecting ring 10, a sealing ring 12 is embedded in the sealing groove, and the sealing ring 12 is in contact with the top end of the upper connecting member 3.

[0046] In actual use: the sealing ring 12 can seal the upper connecting part 3 and the upper connecting ring 10, so that some of the internal gas can enter the heat insulation part and the inner tank 4 through the gap between the upper connecting part 3 and the starting base 2.

[0047] Example 4:

[0048] Reference Figure 1 and Figure 4 The difference in this embodiment is that a lower connecting ring 13 is provided on the outer circumferential surface of the bottom end of the lower connecting member 8, and the outer circumferential surface of the lower connecting ring 13 is fixed to the heat insulation part.

[0049] In actual use: The position of the heat insulation part can be restricted by the lower connecting ring 13, and the distance between the outer circumferential surface of the inner tank 4 and the heat insulation part is the same. At the same time, the upper surface of the lower connecting piece 8 abuts against the lower end of the inner tank 4, forming a structure similar to the upper stop of the inner tank mentioned above. It also serves the same function as the upper stop of the inner tank 4. Meanwhile, a laser welding is performed at the angle between the outer edge of the bottom end of the inner tank 4 and the lower connecting piece 8.

[0050] Example 5:

[0051] Reference Figure 1 and Figure 3 The difference in this embodiment is that the heat insulation part is a cylindrical outer tank 14, the top of the outer tank 14 is fixed to the starting base 2, the bottom of the outer tank 14 is fixed to the lower connecting piece 8, and an annular space is formed between the outer tank 14 and the inner tank 4.

[0052] In actual use: The top of the outer tank 14 has an upper stop, which is connected to the lower edge of the outer circumference of the upper connecting ring 10 by an interference fit. Then, a laser weld is performed around the top of the outer tank 14 where it meets the upper connecting ring 10. The upper stop can withstand the axial force of the outer tank 14, and the interference fit can withstand the radial force of the outer tank 14. At the same time, the outer edge of the upper surface of the lower connecting ring 13 has a lower stop, and the bottom of the outer tank 14 is connected to the lower stop by an interference fit. A laser weld is performed around the outer surface of the outer tank 14 where it meets the lower connecting ring 13. The lower stop and the interference fit can withstand the axial and radial forces of the outer tank 14. This allows the outer tank 14 to be coaxial with the inner tank 4, forming a sealed annular space between the outer tank 14 and the inner tank 4, thereby achieving the purpose of temperature insulation.

[0053] Example 6:

[0054] With reference to Figure 1 The difference of the embodiment is that the air outlet 9 is an L-shaped tubular structure, one end of the air outlet 9 is provided with external threads, the other end is provided with an anti-skid step, and the air outlet 9 is threadedly connected with the air outlet hole of the lower connecting piece 8 through the external threads.

[0055] In actual use, the threads of the air outlet 9 can facilitate the connection with the lower connecting piece, and facilitate replacement, and the L-shaped tubular structure of the air outlet 9 is more suitable for the installation position, reduces the space occupation, and the anti-skid step can prevent the axial movement of the connected pipeline.

[0056] Embodiment 7:

[0057] With reference to Figure 1 The difference of the embodiment is that the inner tank 4 and the outer tank 14 are both made of stainless steel.

[0058] In actual use, the inner tank 4 and the outer tank 14 made of stainless steel have the excellent properties of corrosion resistance, heat resistance, stable chemical structure, high strength, high toughness and high plasticity, thereby reducing the overall weight of the heat insulation mechanism.

[0059] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by those skilled in the art without departing from the purpose of the utility model, and all the changes are within the protection range of the technology.

Claims

1. An airborne chemical oxygen generator with a heat-insulating structure, comprising a starting mechanism (1) and a starting base (2) detachably connected to the lower end of the starting mechanism (1), characterized in that, Also include: The upper connecting piece (3) is provided with a base connecting hole in the center, and the starting base (2) is detachably connected to the base connecting hole of the upper connecting piece (3); The inner tank body (4) is fixed to the lower end outer circumferential surface of the upper connecting piece (3); The ignition agent (5) and the oxygen candle (6) are filled in the inner tank body (4) respectively, and the oxygen candle (6) has a cylindrical hole at the top end, and the ignition agent (5) is filled in the cylindrical hole; The filter agent (7) is filled in the inner tank body (4) and located at the bottom end of the oxygen candle (6), and a contact surface is formed between the upper surface of the filter agent (7) and the lower surface of the oxygen candle (6); The lower connecting piece (8) is fixed to the bottom end inner circumferential surface of the inner tank body (4), and the lower connecting piece (8) is located below the filter agent (7); The air outlet nozzle (9) is detachably connected to the air outlet hole in the center of the lower connecting piece (8); The heat insulation part is detachably connected to the outer circumferential surface of the upper connecting piece (3) and the lower connecting piece (8), and the inner tank body (4) is located in the heat insulation part.

2. The chemical oxygen generator having a heat insulation structure for on-board use according to claim 1, characterized by The outer circumferential surface of the starting base (2) is provided with an upper connecting ring (10), the outer circumferential surface of the upper connecting ring (10) is fixed to the heat insulation part, and the top end of the upper connecting piece (3) is in contact with the lower surface of the upper connecting ring (10).

3. The chemical oxygen generator having a heat-insulating structure for on-board use according to claim 2, characterized by The lower surface of the upper connecting ring (10) is provided with a sealing groove, the sealing groove is embedded with a sealing ring (12), and the sealing ring (12) is also in contact with the top end of the upper connecting piece (3).

4. The chemical oxygen generator having a heat insulation structure for on-board use according to claim 1, wherein The outer circumferential surface of the bottom end of the lower connecting piece (8) is provided with a lower connecting ring (13), and the outer circumferential surface of the lower connecting ring (13) is fixed to the heat insulation part.

5. The chemical oxygen generator having a heat insulation structure for on-board use according to claim 1, wherein The heat insulation part is a cylindrical outer tank body (14), the top end of the outer tank body (14) is fixed to the starting base (2), the bottom end of the outer tank body (14) is fixed to the lower connecting piece (8), and the annular space is formed between the outer tank body (14) and the inner tank body (4).

6. The chemical oxygen generator having a heat insulation structure for on-board use according to claim 1, wherein One end of the air outlet nozzle (9) is provided with an external thread, and the other end is provided with an anti-skid platform, and the air outlet nozzle (9) is threadedly connected to the air outlet hole of the lower connecting piece (8) through the external thread.

7. The chemical oxygen generator having a heat insulation structure for on-board use according to claim 5, wherein The inner tank body (4) and the outer tank body (14) are made of stainless steel.

8. The chemical oxygen generator having a heat insulation structure for on-board use according to claim 6, wherein The air outlet nozzle (9) is an L-shaped tubular structure.

9. The chemical oxygen generator having a heat insulation structure for on-board use according to claim 1, wherein The upper connecting piece (3) is provided with an inner tank body upper stopper, and the top end of the inner tank body (4) is connected to the inner tank body upper stopper of the upper connecting piece (3).

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