Integrated anti-impact automobile sound insulation front wall with built-in hidden water channel

Abstract

The application discloses an integrated anti-impact automobile sound insulation front bulkhead with a built-in hidden water guide channel, which comprises a front plate; the front plate is provided with a sunken groove, and the sunken groove is provided with a back plate, an air bag layer and a sandwich layer; the sandwich layer comprises a water guide pipe, the water guide pipe is externally provided with second arc-shaped partitions, and the second arc-shaped partitions are provided with first arc-shaped partitions; the first arc-shaped partitions are internally provided with air chamber partitions, and the air chamber is internally provided with an air bag; the top surface of the front plate is provided with a water inlet, the water inlet is internally provided with a sleeve, and the sleeve is provided with a filter screen; the water guide pipe is provided with an annular air bag, the annular air bag is communicated with the air chamber, and the water guide pipe is provided with a spring. The cavity in the sandwich layer can weaken noise, the water guide pipe can drain water accumulated above the front bulkhead, and when the front bulkhead is impacted, the back plate will be concave downward, so that the gas in the air bag layer enters the air bag, the anti-impact capacity of the sandwich layer is improved, and simultaneously, the annular air bag is inflated to protect the water guide pipe.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of automobile production, in particular to an integrated anti-impact automobile sound insulation front wall with a built-in hidden water guide groove. BACKGROUND

[0002] The front wall refers to a partition between an engine compartment and a vehicle cabin, which is connected with a floor and a front pillar, is a key part for ensuring a good driving environment of the automobile, and can improve the crashworthiness of the automobile and the driving cabin environment.

[0003] At present, the existing automobile front wall has low strength, poor protection capability for drivers and passengers, and no drainage structure is arranged on the existing front wall, so that rainwater is easily accumulated at the connecting part above the front wall during automobile use, thereby affecting the service life of the front wall; and the noise of an engine is transmitted to the driving cabin through the front wall during use, which affects the mood of the driver.

[0004] Therefore, the integrated anti-impact automobile sound insulation front wall with a built-in hidden water guide groove is urgently needed. SUMMARY

[0005] To solve the above technical problems, the application provides an integrated anti-impact automobile sound insulation front wall with a built-in hidden water guide groove.

[0006] The technical scheme of the application is as follows: an integrated anti-impact automobile sound insulation front wall with a built-in hidden water guide groove, the front wall comprising a front plate;

[0007] A sink is arranged on the back of the front plate, and a back plate, an air bag layer and a sandwich layer are sequentially arranged in the sink from top to bottom;

[0008] The sandwich layer comprises a plurality of vertical water guide pipes arranged at equal intervals, a second arc-shaped partition plate is arranged outside each water guide pipe for protecting the water guide pipe, a plurality of first arc-shaped partition plates are arranged between adjacent second arc-shaped partition plates, and the first arc-shaped partition plates and the second arc-shaped partition plates are fixedly connected;

[0009] Two air chamber partition plates are arranged in the first arc-shaped partition plate for dividing the space in the first arc-shaped partition plate into two symmetrical air chambers and a cavity, sealing blocks are arranged at the two ends of the air chamber, and an air bag is arranged in the air chamber and communicated with the air bag layer;

[0010] The lower end of the water guide pipe penetrates through the bottom surface of the front plate, the top surface of the front plate at the position corresponding to the water guide pipe is provided with a water inlet, a sleeve pipe is slidably connected in the water inlet, a filter screen is fixedly connected to the upper end of the sleeve pipe, the upper end of the water guide pipe penetrates through the bottom surface of the sleeve pipe, and the water guide pipe and the sleeve pipe are slidably connected;

[0011] The upper end of the water guide pipe is fixedly provided with a limiting ring for preventing the sleeve from falling off, an annular air bag is sleeved on the water guide pipe at the lower end of the sleeve, the annular air bag is communicated with the adjacent air chamber through a pipe, and a spring is sleeved on the water guide pipe between the limiting ring and the bottom surface of the sleeve.

[0012] Description: The cavity and the air chamber in the front wall panel interlayer can reduce the noise generated by the engine, the water guide pipe can drain the accumulated water above the front wall panel, the air chamber in the interlayer can be filled with gas, when the front wall panel is impacted, the back plate will be concave downward, the gas in the air bag layer enters the air bag, the air bag expands after inflation to improve the impact resistance of the interlayer, and when the air bag expands, the gas in the air chamber is squeezed into the annular air bag to make the annular air bag expand to protect the water guide pipe from being damaged due to impact, meanwhile, the filter screen can prevent impurities from entering the water guide pipe, and when the annular air bag inflates and expands, the annular air bag pushes the sleeve to make the sleeve drive the filter screen to slide upward to push the impurities out of the water inlet to avoid the water inlet being blocked.

[0013] Further, the air chamber partition is arc-shaped.

[0014] Description: The arc-shaped air chamber partition has better impact resistance and can improve the structural strength of the interlayer.

[0015] Further, the sound-absorbing cotton is arranged in the sink groove between the back plate and the interlayer.

[0016] Description: The sound-absorbing cotton can further absorb the noise passing through the interlayer, improve the sound insulation effect, and improve the driving experience of the driver.

[0017] Further, the front plate is provided with a reinforcing rib on the front surface.

[0018] Description: The reinforcing rib can improve the structural strength of the front plate and prevent the front plate from being deformed.

[0019] Further, a fire-retardant layer is arranged in the sink groove between the front plate and the interlayer.

[0020] Description: The fire-retardant layer can insulate the heat of the engine and protect the cab environment, and can ensure the safety of the cab when the engine catches fire.

[0021] Further, the fire-retardant layer comprises, by weight fraction, 50-80 parts of glass fiber, 40-55 parts of epoxy resin, 15-25 parts of trichloroethyl phosphate, 10-15 parts of calcium oxide, 2-10 parts of benzophenone, 2-5 parts of ethylenediamine and 3-8 parts of sodium pyrophosphate.

[0022] Description: The fire-retardant layer with the above components has excellent fire-retardant performance and can effectively prevent the spread of fire to protect the safety of the cockpit.

[0023] Further, the preparation method of the fire-retardant layer comprises the following steps:

[0024] S1, the glass fiber, epoxy resin, trichloroethyl phosphate, calcium oxide, benzophenone, ethylenediamine and sodium pyrophosphate are put into a reaction kettle, stirred uniformly to obtain a mixture;

[0025] S2, the reaction kettle is heated to 80-100℃, the mixture is stirred under the irradiation of a 1000-2000W ultraviolet lamp, the stirring time is 10-20min, and every 1-3min, 2-ethyl bromobenzoate is added to the mixture during the stirring process, the initial addition amount of 2-ethyl bromobenzoate is 1-3% of the total weight of the mixture, then the addition amount of 2-ethyl bromobenzoate is increased by 5-15% compared with the previous addition amount each time, and the power of the ultraviolet lamp is reduced by 50-100W after each addition of 2-ethyl bromobenzoate, until the stirring is completed to obtain a laminate;

[0026] S3, the laminate is put into a mold and cured at 100-120℃ for 2-3h, and then demolded to obtain a flame-retardant layer.

[0027] Description: The above flame-retardant layer is obtained by combining 2-ethyl bromobenzoate with other components of the flame-retardant layer under ultraviolet irradiation, improving the flame-retardant and heat-insulating properties of the glass fiber and the epoxy resin, and the obtained flame-retardant layer has excellent flame-retardant property and good impact resistance.

[0028] Further, the water guide pipe side wall in the sleeve is provided with external threads, the bottom surface of the sleeve is provided with internal threads for cooperating with the external threads to rotate the sleeve, and the filter screen is provided with a first scraper for cleaning the water inlet side wall by rotating the sleeve.

[0029] Description: When the annular air bag is inflated, the sleeve will slide upward, and under the cooperation of the external threads and the internal threads, the sleeve will rotate while sliding upward, so that the first scraper rotates with the sleeve to clean the inner wall of the water inlet, avoiding the attachment of a large amount of impurities on the inner wall of the water inlet.

[0030] Further, an outer magnetic ring is sleeved on the water guide pipe at the lower end of the sleeve, an inner magnetic ring is slidably connected in the water guide pipe at a position corresponding to the outer magnetic ring, an axle is arranged in the water guide pipe, one end of the axle is fixedly connected with a connecting frame arranged in the inner magnetic ring, and the other end of the axle penetrates the filter screen and is provided with a second scraper for cleaning the surface of the filter screen by rotating the axle.

[0031] Description: When the sleeve slides upward and rotates, the sleeve will drive the outer magnetic ring to rotate, and under the magnetic force, the inner magnetic ring will rotate with the outer magnetic ring, so that the inner magnetic ring can drive the second scraper to rotate through the axle, and the rotating second scraper can clean the surface of the filter screen, avoiding the blockage of the filter screen.

[0032] Further, the front plate and the back plate are made of aluminum alloy, and the interlayer is made of ultra-high molecular weight polyethylene.

[0033] Description: The aluminum alloy has excellent comprehensive performance, can ensure the lightweight of the front plate and has high structural strength, and the ultra-high molecular weight polyethylene has good impact resistance and can absorb impact energy.

[0034] The beneficial effects of the present application are:

[0035] (1) The cavities and air chambers existing in the interlayer of the front plate can weaken the noise generated by the engine, the water guide pipe can drain the accumulated water above the front plate, the air chambers in the interlayer can be filled with gas, and when the front plate is impacted, the back plate will be concave downward, so that the gas in the air chamber layer enters the air bag, and after the air bag is inflated, the impact resistance of the interlayer is improved.

[0036] (2) When the air bag expands, the gas in the air chamber is pushed into the annular air bag, so that the annular air bag expands to protect the water guide pipe and avoid damage to the water guide pipe due to impact, and the filter screen can prevent impurities from entering the water guide pipe. When the annular air bag inflates and expands, it will push the sleeve, so that the sleeve drives the filter screen to slide upward and push the impurities out of the water inlet, so as to avoid the blockage of the water inlet.

[0037] (3) When the annular air bag inflates and expands, it will push the sleeve to slide upward, and under the cooperation of the external thread and the internal thread, the sleeve will rotate while sliding upward, so that the first scraper rotates with the sleeve to clean the inner wall of the water inlet, avoiding the attachment of a large amount of impurities on the inner wall of the water inlet.

[0038] (4) While the sleeve slides upward and rotates, the sleeve will drive the outer magnetic ring to rotate, and under the magnetic force, the inner magnetic ring will rotate with the outer magnetic ring, so that the inner magnetic ring can drive the second scraper to rotate through the shaft, and the rotating second scraper will clean the surface of the filter screen, avoiding the blockage of the filter screen. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 is a schematic diagram of the overall structure of embodiment 1 of the present application;

[0040] Figure 2 is a schematic diagram of the internal structure of embodiment 1 of the present application;

[0041] Figure 3 is an exploded view of embodiment 1 of the present application;

[0042] Figure 4 is a schematic diagram of the interlayer structure of embodiment 1 of the present application;

[0043] Figure 5 is a schematic diagram of the water inlet structure of embodiment 1 of the present application;

[0044] Figure 6This is a schematic diagram of the water guiding pipe structure in Embodiment 1 of the present invention;

[0045] Figure 7 This is a schematic diagram of the water guiding pipe structure in Embodiment 2 of the present invention;

[0046] Figure 8 This is a schematic diagram of the water guiding pipe structure in Embodiment 3 of the present invention;

[0047] Figure 9 This is a schematic diagram of the inner magnetic ring structure in Embodiment 3 of the present invention;

[0048] Among them, 1-front plate, 11-sinking tank, 12-sound absorbing cotton, 13-flame retardant layer, 14-water inlet, 2-interlayer, 21-first arc-shaped partition, 22-second arc-shaped partition, 23-air chamber partition, 24-water guide pipe, 241-limiting ring, 242-inner magnetic ring, 243-shaft, 25-sleeve, 251-filter screen, 252-first scraper, 253-second scraper, 26-annular airbag, 27-outer magnetic ring, 3-airbag layer, 4-back plate. Detailed Implementation

[0049] The present invention will now be described in more detail with reference to specific embodiments, so as to better demonstrate the advantages of the present invention.

[0050] Example 1

[0051] like Figure 1 As shown, an integrated impact-resistant automotive sound insulation front bulkhead with a built-in hidden water channel is disclosed, the front bulkhead comprising a front panel 1;

[0052] like Figure 2 , 3 As shown, the back of the front panel 1 is provided with a groove 11, and the groove 11 is provided with a back panel 4, an airbag layer 3 and a sandwich layer 2 from top to bottom.

[0053] like Figure 4 As shown, the interlayer 2 includes six vertically spaced water guide pipes 24. Each of the six water guide pipes 24 is provided with a second arc-shaped partition 22 for protecting the water guide pipes 24. A plurality of first arc-shaped partitions 21 are provided between adjacent second arc-shaped partitions 22. The plurality of first arc-shaped partitions 21 are fixedly connected to each other and to each other with the second arc-shaped partitions 22.

[0054] The first arc-shaped partition 21 is provided with two air chamber partitions 23 for dividing the space inside the first arc-shaped partition 21 into two symmetrically arranged air chambers and a cavity. Both ends of the air chamber are provided with sealing blocks, and an airbag communicating with the airbag layer 3 is provided inside the air chamber.

[0055] like Figure 5As shown, the lower end of the water guide pipe 24 penetrates the bottom surface of the front plate 1, and the top surface of the front plate 1 at the corresponding position of the water guide pipe 24 is provided with a water inlet 14, and a sleeve 25 is slidably connected in the water inlet 14, and a filter screen 251 is fixedly connected to the upper end of the sleeve 25, and the upper end of the water guide pipe 24 penetrates the bottom surface of the sleeve 25, and the water guide pipe 24 is slidably connected with the sleeve 25;

[0056] As shown in the drawings, Figure 6 The upper end of the water guide pipe 24 is fixedly provided with a limiting ring 241 for preventing the sleeve 25 from falling off, and an annular air bag 26 is sleeved on the water guide pipe 24 at the lower end of the sleeve 25, and the annular air bag 26 is in communication with the adjacent air chamber through a pipe, and a spring is sleeved on the water guide pipe 24 between the limiting ring 241 and the bottom surface of the sleeve 25;

[0057] The air chamber partition 23 is arc-shaped, and the sound-absorbing cotton 12 is arranged in the sink 11 between the back plate 4 and the interlayer 2, the front plate 1 is provided with a reinforcing rib on the front surface, the fire-retardant layer 13 is arranged in the sink 11 between the front plate 1 and the interlayer 2, the fire-retardant layer is made of a commercially available fire-retardant epoxy resin plate, the front plate 1 and the back plate 4 are made of aluminum alloy, and the interlayer 2 is made of ultra-high molecular weight polyethylene;

[0058] The working principle of the above front wall is that the air chamber and the cavity in the first arc-shaped partition 21 can reduce noise, the water guide pipe 24 can discharge water above the front wall, the filter screen 251 can filter the accumulated water in the water inlet 14, and the air chamber is filled with gas;

[0059] During the driving of the automobile, impact will be generated, and after the front wall is impacted, the back plate 4 will be concave downward, at this time, the back plate 4 will press the air bag layer 3, the gas in the air bag layer 3 will enter the air bag after being pressed, and after the air bag is inflated in the air chamber, the anti-deformation ability of the first arc-shaped partition 21 is improved, and the anti-impact performance of the interlayer 2 is improved;

[0060] At the same time, the inflation of the air bag in the air chamber will press the gas in the air chamber, the gas in the air chamber is pressed into the annular air bag 26, and the annular air bag 26 is inflated to protect the water guide pipe 24, so as to avoid damage of the water guide pipe 24 due to impact;

[0061] When the annular air bag 26 is inflated, the sleeve 25 will be pushed, so that the sleeve 25 slides upward together with the filter screen 251, and when the filter screen 251 slides upward, the impurities in the water inlet 14 will be pushed out of the water inlet 14;

[0062] After the impact ends, the back plate 4 begins to recover, at the same time, the gas in the air bag returns to the air bag layer 3 to help the back plate 4 recover, and the gas in the annular air bag 26 returns to the air chamber, and under the action of the spring, the sleeve 25 begins to reset.

[0063] Example 2

[0064] As shown in Figure 7 The embodiment is basically same as embodiment 1, and the difference is that the water guide pipe 24 side wall located in the sleeve 25 is provided with external threads, the sleeve 25 bottom surface is provided with internal threads for cooperating with the external threads to rotate the sleeve 25, and the filter screen 251 is provided with a first scraper 252 for cleaning the water inlet 14 side wall by rotating the sleeve 25.

[0065] The working principle of the above structure is that when the annular air bag 26 pushes the sleeve 25 to slide upward, the sleeve 25 will rotate while sliding upward due to the cooperation of the external threads and the internal threads, the rotating sleeve 25 will drive the filter screen 251 to rotate, and the first scraper 252 will scrape off the impurities on the water inlet 14 side wall while rotating with the filter screen 251.

[0066] Embodiment 3

[0067] As shown in Figure 8 , 9 The embodiment is basically same as embodiment 1, and the difference is that the water guide pipe 24 upper end of the sleeve 25 is sleeved with an external magnetic ring 27, the water guide pipe 24 located at the corresponding position of the external magnetic ring 27 is slidably connected with an internal magnetic ring 242, the water guide pipe 24 is provided with a shaft 243, one end of the shaft 243 is fixedly connected with a connecting frame provided in the internal magnetic ring 242, and the other end of the shaft 243 penetrates the filter screen 251 and is provided with a second scraper 253 for cleaning the filter screen 251 surface by rotating the shaft 243.

[0068] The working principle of the above structure is that the sleeve 25 rotates at the same time, and the external magnetic ring 27 rotates at the same time due to the magnetic force, the internal magnetic ring 242 rotates at the same time, the second scraper 253 rotates by the internal magnetic ring 242 through the shaft 243, and the second scraper 253 cleans the filter screen 251 surface during the rotation.

[0069] Embodiment 4

[0070] The embodiment is basically same as embodiment 1, and the difference is that the components of the flame-retardant layer 13 include, by weight fraction, glass fiber 65 parts, epoxy resin 50 parts, trichloroethyl phosphate 20 parts, calcium oxide 12 parts, benzophenone 6 parts, ethylenediamine 3 parts, and sodium pyrophosphate 5 parts.

[0071] The preparation method of the flame-retardant layer 13 includes the following steps:

[0072] S1, the glass fiber, epoxy resin, trichloroethyl phosphate, calcium oxide, benzophenone, ethylenediamine and sodium pyrophosphate are put into a reaction kettle, stirred uniformly to obtain a mixture;

[0073] S2, heat the reactor to 90°C, and under the irradiation of a 1500W ultraviolet lamp, stir the mixture, the stirring time is 15min, and every 2min, add 2-ethyl 2-bromobenzoate to the mixture, the initial amount of 2-ethyl 2-bromobenzoate is 2% of the total weight of the mixture, and then the amount of 2-ethyl 2-bromobenzoate added each time is increased by 10% compared to the previous time, and after each addition of 2-ethyl 2-bromobenzoate, the power of the ultraviolet lamp is reduced by 75W, until the stirring is completed to obtain a layer plate material;

[0074] S3, place the layer plate material into a mold and cure at 110°C for 2.5h, and after curing, demold to obtain a flame-retardant layer 13.

[0075] Example 5

[0076] This example is basically the same as Example 4, except that the components of the flame-retardant layer include, by weight fraction: glass fiber 50 parts, epoxy resin 40 parts, trichloroethyl phosphate 15 parts, calcium oxide 10 parts, benzophenone 2 parts, ethylenediamine 2 parts, and sodium pyrophosphate 3 parts.

[0077] Example 6

[0078] This example is basically the same as Example 4, except that the components of the flame-retardant layer include, by weight fraction: glass fiber 80 parts, epoxy resin 55 parts, trichloroethyl phosphate 25 parts, calcium oxide 15 parts, benzophenone 10 parts, ethylenediamine 5 parts, and sodium pyrophosphate 8 parts.

[0079] Example 7

[0080] This example is basically the same as Example 4, except that the mixture is stirred under the irradiation of a 1000W ultraviolet lamp, and after each addition of 2-ethyl 2-bromobenzoate, the power of the ultraviolet lamp is reduced by 50W.

[0081] Example 8

[0082] This example is basically the same as Example 4, except that the mixture is stirred under the irradiation of a 2000W ultraviolet lamp, and after each addition of 2-ethyl 2-bromobenzoate, the power of the ultraviolet lamp is reduced by 100W.

[0083] Example 9

[0084] This example is basically the same as Example 4, except that the stirring time is 10min, and every 1min, 2-ethyl 2-bromobenzoate is added to the mixture, the initial amount of 2-ethyl 2-bromobenzoate is 1% of the total weight of the mixture, and then the amount of 2-ethyl 2-bromobenzoate added each time is increased by 5% compared to the previous time.

[0085] Example 10

[0086] This example is basically the same as example 4, except that the stirring time is 20 min, and 2-bromoethyl benzoate is added to the mixture every 3 min during stirring, the initial amount of 2-bromoethyl benzoate is 3% of the total weight of the mixture, and the subsequent amount of 2-bromoethyl benzoate is increased by 15% compared to the previous addition.

[0087] Experimental example

[0088] In order to explore the influence of preparation parameters on the flame retardant performance, the flame retardant layer samples of each of the above examples are tested for performance, and the specific exploration is as follows:

[0089] 1. Explore the influence of flame retardant layer composition on performance:

[0090] Examples 1, 4, 5, and 6 are used as experimental comparisons, and the performance of the flame retardant layer with different compositions is shown in Table 1 as follows:

[0091] Table 1 Performance of flame retardant layer with different compositions

[0092] Group Oxygen Index % Notched Charpy Impact Strength KJ / m 2 ]] Example 1 25.6 19.7 Example 4 36.2 24.2 Example 5 33.5 22.8 Example 6 33.8 22.6

[0093] From the data in Table 1, it can be seen that the oxygen index and notched impact strength of example 4 are higher than those of example 1, indicating that the flame retardant performance and impact resistance of the flame retardant layer of example 4 are better; the oxygen index and notched impact strength of example 4 are the highest among examples 4, 5, and 6, indicating that the flame retardant performance and impact resistance of the flame retardant layer of example 4 are the best, and the composition of the flame retardant layer of example 4 is the best.

[0094] 2. Explore the influence of UV lamp power on the performance of the flame retardant layer:

[0095] Examples 4, 7, and 8 are used as experimental comparisons, and example 4 is used as a reference with no change in UV lamp power as comparative example 1, and the performance of the flame retardant layer under different UV lamp powers is shown in Table 2 as follows:

[0096] Table 2 Performance of flame retardant layer under different UV lamp powers

[0097] Group Oxygen Index % Notched Charpy Impact Strength KJ / m 2 ]] Example 4 36.2 24.2 Example 7 34.6 23.4 Example 8 32.8 22.9 Comparative Example 1 27.4 20.5

[0098] From the data in Table 2, it can be seen that the oxygen index and notched impact strength of example 4 are the highest among examples 4, 7, and 8, indicating that the flame retardant performance and impact resistance of the flame retardant layer of example 4 are the best, and the UV lamp power of example 4 is the best; the oxygen index and notched impact strength of example 4 are higher than those of comparative example 1, indicating that the flame retardant performance and impact resistance of the flame retardant layer obtained by the UV lamp irradiation method of example 4 are better.

[0099] 3. Explore the effect of the addition amount of ethyl 2-bromobenzoate on the performance of the flame-retardant layer:

[0100] Examples 4, 9, 10 as experimental comparison, while Example 4 as a reference, the addition amount of ethyl 2-bromobenzoate does not change as Comparative Example 2, the performance of the flame-retardant layer under different UV lamp power is shown in Table 3 as follows:

[0101] Table 3 Performance of the flame-retardant layer with different addition amounts of ethyl 2-bromobenzoate

[0102] Group Oxygen Index % Notched Charpy Impact Strength KJ / m 2 ]] Example 4 36.2 24.2 Example 9 30.8 21.7 Example 10 32.1 22.4 Comparative Example 2 28.2 20.2

[0103] From the data in Table 3, compared with Examples 4, 9, 10, the oxygen index and notched impact strength of Example 4 are the highest, indicating that the flame-retardant performance and impact resistance of the flame-retardant layer of Example 4 are the best, and the addition amount of ethyl 2-bromobenzoate of Example 4 is more optimal; compared with Comparative Example 2, the oxygen index and notched impact strength of Example 4 are higher, indicating that the flame-retardant performance and impact resistance of the flame-retardant layer obtained by the addition method of ethyl 2-bromobenzoate of Example 4 are better.

Claims

1. An integrated impact-resistant automotive sound deadening dash panel with a built-in hidden water channel, characterized in that, The front wall comprises a front plate (1); The back of the front plate (1) is provided with a sunken groove (11), and the sunken groove (11) is sequentially provided, from top to bottom, with a back plate (4), an air bag layer (3) and a sandwich layer (2); The sandwich layer (2) comprises a plurality of vertical water guide pipes (24) arranged at equal intervals, each of the plurality of water guide pipes (24) is provided with a second arc-shaped partition plate (22) for protecting the water guide pipe (24), and a plurality of first arc-shaped partition plates (21) are arranged between adjacent second arc-shaped partition plates (22), and the first arc-shaped partition plates (21) and the second arc-shaped partition plates (22) are fixedly connected. The first arc-shaped partition plate (21) is provided with two air chamber partition plates (23) for dividing the space in the first arc-shaped partition plate (21) into two symmetrical air chambers and a cavity, the two ends of the air chamber are provided with sealing blocks, and the air chamber is provided with an air bag in communication with the air bag layer (3); The lower end of the water guide pipe (24) penetrates through the bottom surface of the front plate (1), the top surface of the front plate (1) at the position corresponding to the water guide pipe (24) is provided with a water inlet (14), the water inlet (14) is slidably connected with a sleeve (25), the upper end of the sleeve (25) is fixedly connected with a filter screen (251), the upper end of the water guide pipe (24) penetrates through the bottom surface of the sleeve (25), and the water guide pipe (24) and the sleeve (25) are slidably connected; The upper end of the water guide pipe (24) is fixedly provided with a limiting ring (241) for preventing the sleeve (25) from falling off, an annular air bag (26) is sleeved on the water guide pipe (24) at the lower end of the sleeve (25), the annular air bag (26) is in communication with the adjacent air chamber through a pipeline, and a spring is sleeved on the water guide pipe (24) between the limiting ring (241) and the bottom surface of the sleeve (25); The side wall of the water guide pipe (24) in the sleeve (25) is provided with an external thread, the bottom surface of the sleeve (25) is provided with an internal thread for cooperating with the external thread to rotate the sleeve (25), and the filter screen (251) is provided with a first scraper (252) for cleaning the side wall of the water inlet (14) by rotating the sleeve (25); The water guide pipe (24) at the lower end of the sleeve (25) is sleeved with an outer magnetic ring (27), an inner magnetic ring (242) is slidably connected in the water guide pipe (24) at the position corresponding to the outer magnetic ring (27), and an axle rod (243) is arranged in the water guide pipe (24), one end of the axle rod (243) is fixedly connected with a connecting frame arranged in the inner magnetic ring (242), and the other end of the axle rod (243) penetrates through the filter screen (251) and is provided with a second scraper (253) for cleaning the surface of the filter screen (251) by rotating the axle rod (243).

2. The integrated impact-resistant automobile soundproof front panel with a built-in hidden water channel according to claim 1, characterized in that, The air chamber partition plate (23) is arc-shaped.

3. The integrated impact sound insulation front panel with built-in hidden water channel according to claim 1, characterized in that, The sunken groove (11) between the back plate (4) and the air bag layer (3) is provided with sound-absorbing cotton (12).

4. The integrated impact sound insulation front panel with built-in hidden water channel according to claim 1, characterized in that, The front plate (1) is provided with a reinforcing rib on the front surface.

5. The integrated impact sound insulation front panel with built-in hidden water channel according to claim 1, characterized in that, The sunken groove (11) between the front plate (1) and the sandwich layer (2) is provided with a fire-retardant layer (13).

6. An integrated impact absorbing automobile soundproof front panel with a built-in hidden water channel according to claim 5, characterized in that, The components of the fire-retardant layer (13) include, by weight fraction: glass fiber 50-80 parts, epoxy resin 40-55 parts, trichloroethyl phosphate 15-25 parts, calcium oxide 10-15 parts, benzophenone 2-10 parts, ethylenediamine 2-5 parts, and sodium pyrophosphate 3-8 parts.

7. The integrated impact sound insulation front panel with built-in hidden water channel according to claim 6, characterized in that, The preparation method of the fire-retardant layer (13) includes the following steps: S1, the glass fiber, epoxy resin, trichloroethyl phosphate, calcium oxide, benzophenone, ethylenediamine and sodium pyrophosphate are put into a reaction kettle, stirred uniformly to obtain a mixture; S2, the reaction kettle is heated to 80-100℃, and the mixture is stirred under the irradiation of a 1000-2000W ultraviolet lamp, the stirring time is 10-20min, and every 1-3min during the stirring process, 2-ethyl bromobenzoate is added to the mixture once, the initial addition amount of 2-ethyl bromobenzoate is 1-3% of the total weight of the mixture, then the addition amount of 2-ethyl bromobenzoate is increased by 5-15% compared with the previous addition amount each time, and the power of the ultraviolet lamp is reduced by 50-100W after each addition of 2-ethyl bromobenzoate, until the stirring is completed to obtain a layer material; S3, the layer material is put into a mold and cured at 100-120℃ for 2-3h, and then demolded to obtain the fire-retardant layer (13).

8. The integrated impact sound insulation front panel with built-in hidden water channel according to claim 1, characterized in that, The front plate (1) and the back plate (4) are made of aluminum alloy, and the interlayer (2) is made of ultrahigh molecular weight polyethylene.

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