Electric vehicle communication wiring harness and preparation process thereof

Abstract

The present invention belongs to the technical field of communication harnesses, and specifically relates to an electric vehicle communication harness and a preparation process thereof, wherein an electric vehicle communication harness comprises a guide core, a plurality of cables are wound and connected to the outside of the guide core, a sheath is covered on the outside of the cable, a plurality of flame retardant layers are wound and connected to the outside of the sheath, a metal mesh layer is covered on the outside of the flame retardant layer, flame retardant cotton is filled between the sheath and the metal mesh layer, a first rubber layer is covered on the outside of the metal mesh layer, a communication terminal is connected to one end of the first rubber layer, the communication terminal is connected to the cable, and the cable comprises a guide core and a second rubber layer. The present invention can greatly improve the wear resistance and fireproof level of the electric vehicle communication harness, and further can greatly reduce the damage and leakage self-ignition phenomenon of the communication harness, ensure the safety of the communication harness when in use, avoid causing the electric vehicle to catch fire, and thus ensure the safety of the electric vehicle users.

Description

Technical Field

[0001] The invention belongs to the technical field of communication harnesses, and in particular relates to an electric vehicle communication harness and a preparation process thereof. Background Art

[0002] Communication harness refers to a connection method that transmits communication signals between the master control and the slave control through the harness. The communication harness is usually composed of multiple cables, and its structure and characteristics are as follows: 1. Number of cables: The communication harness usually contains multiple cables, which connect the communication interface between the master control and the slave control; 2. Cable specifications: The cable specifications in the communication harness vary depending on the application scenario, generally including data cables, power cables, ground cables, etc.; 3. Protection structure: The communication harness usually has a certain protection structure to protect the cable from external damage or electromagnetic interference; 4. Standard interface: The communication harness usually adopts a standardized design of standard interface so that the communication interface between the master control and the slave control can communicate with each other. Communication harnesses are widely used in industrial machinery and equipment, smart home systems, and smart transportation.

[0003] With the rapid development of electric vehicles and the widespread application of electronic control technology, the number of electrical components in electric vehicles has gradually increased, which has led to an increasing number of communication harnesses used in electric vehicles. However, the excessive number of communication harnesses and the low level of fire resistance of the communication harnesses make the communication harnesses easily damaged by external factors, or even leak and self-ignite, which in turn leads to fires in electric vehicles, bringing certain safety hazards to users.

[0004] Therefore, in view of the above technical problems, it is necessary to provide an electric vehicle communication wiring harness and a preparation process thereof.

[0005] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0006] The object of the present invention is to provide an electric vehicle communication wiring harness and a preparation process thereof, which can solve the problem of low fire protection level of the electric vehicle communication wiring harness.

[0007] In order to achieve the above object, a technical solution provided by a specific embodiment of the present invention is as follows:

[0008] A communication harness for an electric vehicle comprises: a guide core, a plurality of cables are wound around the outer side of the guide core, the outer side of the cables are covered with a wrapping layer, a plurality of flame retardant layers are wound around the outer side of the wrapping layer, a metal mesh layer is covered on the outer side of the flame retardant layer, flame retardant cotton is filled between the wrapping layer and the metal mesh layer, a first rubber layer is covered on the outer side of the metal mesh layer, one end of the first rubber layer is connected to a communication terminal, and the communication terminal is connected to the cable.

[0009] In one or more embodiments of the present invention, the cable includes a conductor core and a second rubber layer, and the second rubber layer is made from the following components: 70-90 parts of α, ω-dihydroxypolydimethylsiloxane, 60-72 parts of aluminum hydroxide, 0.6-3.5 parts of carbon black, 12-18 parts of dimethyl silicone oil, 20-28 parts of a cross-linking agent, 6-9 parts of a silane coupling agent, and 2-3 parts of a catalyst.

[0010] In one or more embodiments of the present invention, the flame retardant layer includes a winding shell, which is used to contain dry powder. When the dry powder is heated, it can decompose to generate sodium carbonate, water and carbon dioxide, thereby protecting the winding layer and the cable to prevent further combustion of the entire wiring harness;

[0011] The winding shell and the wrapping layer are bonded and connected with adhesive, and the adhesive has the advantage of high temperature resistance, ensuring that the adhesive can be firmly fixed to the wrapping layer.

[0012] In one or more embodiments of the present invention, the winding shell is filled with dry powder, which can decompose to generate sodium carbonate, water and carbon dioxide when heated, thereby protecting the winding layer and the cable and preventing further combustion of the entire wiring harness;

[0013] A plurality of heat-conducting metal wires are embedded in the side wall of the winding shell. The heat-conducting metal wires can absorb heat, so that the dry powder in the winding shell can be decomposed faster, thereby playing a flame retardant role.

[0014] In one or more embodiments of the present invention, the adhesive is epoxy resin adhesive, which has the advantage of high temperature resistance, ensuring that the winding shell is firmly fixed to the wrapping layer at high temperature;

[0015] The dry powder is one of ammonium phosphate, sodium bicarbonate, sodium chloride and potassium chloride.

[0016] A preparation process for an electric vehicle communication wiring harness comprises the following steps:

[0017] S1. Weigh various raw materials for the second rubber layer according to the proportion, stir them evenly, and repeatedly roll the raw materials with a rolling device to form a soft rubber mixture;

[0018] S2, putting the soft rubber mixture into an extruder for extrusion molding, and coating the guide core, and making the cable after being solidified by coolant;

[0019] S3, after the cable is circumferentially wound around the guide core, it is wrapped with a wrapping layer to make a wire harness;

[0020] S4, after the flame retardant layer is wound around the wire harness, the flame retardant cotton is wrapped around the outside of the flame retardant layer, and the flame retardant cotton and the flame retardant layer are wrapped with a metal mesh layer;

[0021] S5. Extrude the remaining soft rubber mixture in S2 into a mold and fully cover the metal mesh layer, then solidify it in an oven. After cooling with coolant, conduct leakage and combustion tests. If the test results are qualified, the finished product can be obtained.

[0022] In one or more embodiments of the present invention, in S5, the combustion test equipment includes a combustion box, wherein the combustion box is provided with a combustion chamber for accommodating the communication harness so as to perform a combustion test on the communication harness;

[0023] The bottom wall of the combustion chamber is provided with a burner, which can be ignited and burned, thereby performing a combustion test on the communication wiring harness in the combustion chamber;

[0024] A cover door is hingedly connected to the combustion box, and the cover door corresponds to the combustion chamber. When the communication harness is subjected to a combustion test, the cover door is in a closed state to prevent smoke generated by the combustion of the communication harness from overflowing, thereby preventing the staff from being affected by the combustion smoke.

[0025] In one or more embodiments of the present invention, a cable fixing mechanism is installed on the combustion chamber side wall, and the cable fixing mechanism is used to fix the communication harness so as to perform a combustion test on the communication harness;

[0026] The cable fixing mechanism includes a guide rail, which is used to adjust the upper and lower heights of the sliding plate and the burner so as to better test the communication harness;

[0027] A sliding plate is slidably provided on the guide rail, and the sliding plate is used to install a mounting plate. A mounting plate is slidably provided on the sliding plate, and a pair of support rods are fixedly connected to the mounting plate, and a clamping piece is fixedly connected to the support rod, and a screw is threadedly connected to the clamping piece, and a clamping plate is rotatably connected to the screw. Elastic pieces are installed on the clamping piece and the clamping plate, and the screw can drive the clamping plate to move by rotating the screw, and then the distance between the clamping plate and the clamping piece can be adjusted so as to clamp and fix the communication harness. The setting of the elastic piece can further improve the fixing effect of the communication harness.

[0028] In one or more embodiments of the present invention, a filter chamber is provided in the combustion box, a filter bag is installed in the filter chamber, and the filter chamber is connected to the combustion chamber through a plurality of through holes. When the communication harness is subjected to a combustion test, the smoke in the combustion chamber can enter the filter chamber through the through holes, and can be filtered under the action of the filter bag to remove particulate matter in the smoke.

[0029] An air suction pump is installed in the combustion box, and the air suction end of the air suction pump is arranged in the filter cavity. When the air suction pump is running, a negative pressure can be formed in the filter cavity, so that the combustion smoke in the combustion cavity can enter the filter cavity through the through hole and be filtered through the filter bag.

[0030] In one or more embodiments of the present invention, a cooling box is installed in the combustion box, a coolant is provided in the cooling box, a cooling pipe is provided in the cooling box, and the cooling pipe is connected to the air outlet end of the suction pump. The filtered flue gas will flow in the cooling pipe, and the flue gas can be cooled by the coolant to prevent the flue gas temperature from being too high.

[0031] Compared with the prior art, the electric vehicle communication wiring harness and its preparation process of the present invention can greatly improve the wear resistance and fire resistance level of the electric vehicle communication wiring harness, thereby significantly reducing the damage and leakage and spontaneous combustion of the communication wiring harness, ensuring the safety of the communication wiring harness during use, avoiding fire and combustion of the electric vehicle, and thus ensuring the safety of electric vehicle users. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A cross-sectional view of a communication harness for an electric vehicle in one embodiment of the present invention;

[0034] Figure 2 for Figure 1 Schematic diagram of the structure at A in the middle;

[0035] Figure 3 A stereoscopic diagram of a communication harness for an electric vehicle in one embodiment of the present invention;

[0036] Figure 4 This is a process flow chart of preparing a communication harness for an electric vehicle in one embodiment of the present invention;

[0037] Figure 5A three-dimensional diagram of a combustion test device in one embodiment of the present invention;

[0038] Figure 6 for Figure 5 Schematic diagram of the structure at B in the middle;

[0039] Figure 7 A side view of a combustion test device according to an embodiment of the present invention;

[0040] Figure 8 A cross-sectional view of a combustion test device in one embodiment of the present invention;

[0041] Fig. 9 for Figure 8 Schematic diagram of the structure at C in the middle;

[0042] Fig.10 for Figure 8 Schematic diagram of the structure at D in the middle;

[0043] Fig.11 for Figure 8 Schematic diagram of the structure at point E in the middle.

[0044] Description of main reference numerals:

[0045] 1-guide core, 2-cable, 3-wrapping layer, 4-flame retardant cotton, 5-flame retardant layer, 501-winding shell, 502-adhesive glue, 503-dry powder, 504-heat-conducting metal wire, 6-metal mesh layer, 7-first rubber layer, 8-communication terminal, 9-combustion box, 901-combustion chamber, 902-burner, 903-filter chamber, 904-filter bag, 10-cable fixing mechanism, 1001-guide rail, 1002-sliding plate, 1003-mounting plate, 1004-support rod, 1005-clamping piece, 1006-screw, 10 07-clamping plate, 1008-elastic part, 11-air suction pump, 12-cooling box, 1201-cooling pipe, 13-high-pressure tank, 1301-air pipe, 14-processing component, 1401-adjusting plate, 1402-spherical shell, 1403-universal ball, 1404-cylinder, 1405-converging chamber, 1406-cavity, 1407-sealing plate, 1408-linking rod, 1409-accommodating chamber, 1410-elastic rope, 1411-air outlet chamber, 1412-air outlet, 15-liquid storage tank, 1501-delivery pipe. DETAILED DESCRIPTION

[0046] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0047] like Figures 1 to 3 As shown, an electric vehicle communication wiring harness in one embodiment of the present invention includes a guide core 1, a plurality of cables 2 are wound and connected on the outside of the guide core 1, the outside of the cable 2 is covered with a wrapping layer 3, a plurality of flame retardant layers 5 are wound and connected on the outside of the wrapping layer 3, the outside of the flame retardant layer 5 is covered with a metal mesh layer 6, flame retardant cotton 4 is filled between the wrapping layer 3 and the metal mesh layer 6, the outside of the metal mesh layer 6 is covered with a first rubber layer 7, one end of the first rubber layer 7 is connected to a communication terminal 8, and the communication terminal 8 is connected to the cable 2.

[0048] Among them, the cable 2 includes a conductor core and a second rubber layer, and the second rubber layer is made of the following components: 70-90 parts of α, ω-dihydroxypolydimethylsiloxane, 60-72 parts of aluminum hydroxide, 0.6-3.5 parts of carbon black, 12-18 parts of dimethyl silicone oil, 20-28 parts of a crosslinking agent, 6-9 parts of a silane coupling agent and 2-3 parts of a catalyst.

[0049] Preferably, the second rubber layer is made from the following components: 80 parts of α, ω-dihydroxypolydimethylsiloxane, 65 parts of aluminum hydroxide, 2.5 parts of carbon black, 15 parts of dimethyl silicone oil, 22 parts of a crosslinking agent, 7 parts of a silane coupling agent and 2.6 parts of a catalyst.

[0050] In addition, the wrapping layer 3 is made of fire-resistant mica tape and aluminum foil. The metal mesh layer 6 is a mesh structure woven from tinned copper wires and steel wires. The first rubber layer 7 and the second rubber layer use the same proportion of raw materials.

[0051] like Figures 1 to 3 As shown, the flame retardant layer 5 includes a winding shell 501, which is used to accommodate dry powder 503. When the dry powder 503 is heated, it can decompose to generate sodium carbonate, water and carbon dioxide, thereby protecting the winding layer 3 and the cable 2 to avoid further combustion of the entire wiring harness, that is: 2NaHC03=Na2C03+H20+C02↑, and the reaction condition is heating.

[0052] The winding shell 501 and the wrapping layer 3 are bonded with adhesive 502, which is epoxy resin adhesive. The epoxy resin adhesive has the advantage of high temperature resistance, ensuring that the winding shell 501 is firmly fixed to the wrapping layer 3 at high temperature.

[0053] In addition, the winding shell 501 is filled with dry powder 503, and the dry powder 503 is one of ammonium phosphate, sodium bicarbonate, sodium chloride, and potassium chloride.

[0054] Preferably, the dry powder 503 is sodium bicarbonate. When the dry powder 503 is heated, it can decompose to generate sodium carbonate, water and carbon dioxide, thereby protecting the sheath 3 and the cable 2 to prevent further combustion of the entire wiring harness.

[0055] Specifically, a plurality of heat-conducting metal wires 504 are embedded in the side wall of the winding shell 501 . The heat-conducting metal wires 504 can absorb heat, so that the dry powder 503 in the winding shell 501 can be decomposed faster, thereby playing a flame retardant role.

[0056] In addition, in order to allow the gas generated by the reaction of the dry powder 503 to be quickly discharged, a plurality of air holes are provided on the side wall of the winding shell 501. When the dry powder 503 is decomposed by heat, the carbon dioxide gas can be directly discharged to the outside of the winding shell 501 through the air holes, thereby achieving the purpose of flame retardancy.

[0057] The flame retardant layer 5 of the present invention can greatly improve the wear resistance and fire resistance of the electric vehicle communication harness, thereby significantly reducing the damage and leakage self-ignition of the communication harness, ensuring the safety of the communication harness during use, avoiding fire in the electric vehicle, and thus ensuring the safety of the electric vehicle users.

[0058] like Figure 4 As shown, a preparation process of an electric vehicle communication wiring harness comprises the following steps:

[0059] S1. Weigh various raw materials for the second rubber layer according to the proportion, stir them evenly, and repeatedly roll the raw materials with a rolling device to form a soft rubber mixture;

[0060] S2, putting the soft rubber mixture into an extruder for extrusion molding, and coating the guide core, and then curing with a coolant to make a cable 2;

[0061] S3, after the cable 2 is circumferentially wound around the guide core 1, it is wrapped with a wrapping layer 3 to make a wire harness;

[0062] S4, after the flame retardant layer 5 is circumferentially wound around the wire harness, the flame retardant cotton 4 is wrapped around the outside of the flame retardant layer 5, and the flame retardant cotton 4 and the flame retardant layer 5 are wrapped with a metal mesh layer 6;

[0063] S5, the remaining soft rubber mixture in S2 is extruded and molded, and the metal mesh layer 6 is fully covered, and then cured in an oven. After cooling with coolant, leakage and combustion tests are performed. If the test results are qualified, the finished product can be obtained.

[0064] In S5, Figures 5 to 11As shown, the combustion test equipment includes a combustion box 9, in which a combustion chamber 901 is provided for accommodating a communication harness so as to perform a combustion test on the communication harness.

[0065] Among them, a burner 902 is installed on the bottom wall of the combustion chamber 901, and the burner 902 can ignite and burn, and then a combustion test can be performed on the communication wiring harness in the combustion chamber 901 to test the flammability of the communication wiring harness.

[0066] In addition, a cover door is hingedly connected to the combustion box 9, and the cover door corresponds to the combustion chamber 901. When the communication harness is undergoing a combustion test, the cover door is in a closed state to prevent the smoke generated by the combustion of the communication harness from overflowing, thereby preventing the staff from being affected by the combustion smoke.

[0067] like Figures 5 to 11 As shown, a cable fixing mechanism 10 is installed on the side wall of the combustion chamber 901, and the cable fixing mechanism 10 is used to fix the communication wiring harness so as to perform a combustion test on the communication wiring harness.

[0068] The cable fixing mechanism 10 includes a guide rail 1001, and the guide rail 1001 is used to adjust the upper and lower heights of the sliding plate 1002 and the burner 902, so as to better test the communication harness.

[0069] Since the flame temperatures are different, the adjustability of the guide rail 1001 can be used to perform a combustion test on the communication harness using the outer flame or the inner flame generated when the burner 902 burns, thereby greatly improving the combustion test effect of the communication harness.

[0070] In addition, a sliding plate 1002 is slidably provided on the guide rail 1001, and the sliding plate 1002 is used to install the mounting plate 1003. The mounting plate 1003 is slidably provided on the sliding plate 1002, and the mounting plate 1003 can slide on the sliding plate 1002. That is, when the staff needs to take the communication wiring harness, the sliding plate 1002 can be pulled out, thereby facilitating the staff to install or remove the wiring harness, thereby improving the convenience of use for the staff.

[0071] Specifically, a pair of support rods 1004 are fixedly connected to the mounting plate 1003, a clamping member 1005 is fixedly connected to the support rod 1004, a screw rod 1006 is threadedly connected to the clamping member 1005, and a clamping plate 1007 is rotatably connected to the screw rod 1006. By rotating the screw rod 1006, the screw rod 1006 can drive the clamping plate 1007 to move, and then the distance between the clamping plate 1007 and the clamping member 1005 can be adjusted, so as to clamp or release the communication harness, which is convenient for the staff to operate.

[0072] In addition, elastic members 1008 are installed on both the clamping member 1005 and the clamping plate 1007. The setting of the elastic member 1008 can further improve the fixing effect of the communication harness.

[0073] like Figures 5 to 11 As shown, a filter chamber 903 is provided in the combustion box 9, a filter bag 904 is installed in the filter chamber 903, and the filter chamber 903 is connected to the combustion chamber 901 through a plurality of through holes. When the communication harness is subjected to a combustion test, the smoke in the combustion chamber 901 can enter the filter chamber 903 through the through holes, and can be filtered under the action of the filter bag 904 to remove particulate matter in the smoke.

[0074] Preferably, the filter bag 904 is an existing product and can be purchased and used directly.

[0075] Among them, a cleaning cover door is provided on the side wall of the combustion box 9 to facilitate the staff to clean or replace the filter bag 904.

[0076] In addition, an air suction pump 11 is installed in the combustion box 9, and the air suction end of the air suction pump 11 is arranged in the filter chamber 903. When the air suction pump 11 is running, a negative pressure can be formed in the filter chamber 903, so that the combustion smoke in the combustion chamber 901 can enter the filter chamber 903 through the through hole and be filtered by the filter bag 904.

[0077] Specifically, a cooling box 12 is installed in the combustion box 9, a coolant is provided in the cooling box 12, a cooling pipe 1201 is provided in the cooling box 12, and the cooling pipe 1201 is connected to the air outlet of the suction pump 11. The filtered flue gas will flow in the cooling pipe 1201, and the flue gas can be cooled down by the coolant to prevent the flue gas temperature from being too high.

[0078] Preferably, the coolant is water and the cooling tube 1201 is an arc-shaped metal tube, which can extend the flow time of the flue gas in the cooling tube 1201, thereby greatly improving the cooling effect of the flue gas and avoiding the high temperature phenomenon when the flue gas is discharged from the cooling box 12.

[0079] In addition, an observation panel and a liquid exchange pipe are provided on the side wall of the cooling box 12. When the coolant reaches a certain temperature, the coolant in the cooling box 12 can be replaced through the liquid exchange pipe so that the new coolant can be used for cooling again. Since the discharged coolant has a certain amount of heat, it can be used as domestic water, such as for washing hands or other purposes.

[0080] Furthermore, in order to accurately monitor the temperature of the coolant in the cooling box 12, a temperature sensor can be installed in the cooling box 12, and when the coolant reaches a certain temperature, a prompt can be given in time.

[0081] like Figures 5 to 11As shown, a control unit is installed on the side wall of the combustion box 9, and the burner 902 and the air suction pump 11 are both electrically connected to the control unit, which is convenient for the staff to operate.

[0082] like Figures 5 to 11 As shown, a high-pressure tank 13 is installed in the combustion box 9, and the high-pressure tank 13 is connected to the cooling pipe 1201. The flue gas flowing in the cooling pipe 1201 will eventually enter the high-pressure tank 13 for storage so as to prepare the flue gas.

[0083] The side wall of the combustion chamber 901 is also equipped with a processing assembly 14, which is used to accelerate the gas flow rate in the combustion chamber 901, so that the smoke in the combustion chamber 901 can be quickly discharged, so that the staff can open the cover door to observe the communication harness in time. In addition, due to the accelerated gas flow rate in the combustion chamber 901, the surface of the communication harness after combustion can also be cooled.

[0084] Specifically, the processing assembly 14 includes an adjustment plate 1401, a spherical shell 1402 is fixedly connected to the adjustment plate 1401, a universal ball 1403 is rotatably connected inside the spherical shell 1402, and the universal ball 1403 is connected to the side wall of the combustion chamber 901. Through the mutual cooperation between the spherical shell 1402 and the universal ball 1403, the angle of the adjustment plate 1401 can be flexibly adjusted so that the nozzle in the cavity 1406 can spray gas at different angles. At the same time, the sprayed gas can also be adapted to the height of the communication harness, speeding up the air flow near the communication harness, so that the smoke in the combustion chamber 901 is quickly discharged.

[0085] In addition, a cylinder 1404 is installed in the combustion box 9, and the output end of the cylinder 1404 is connected to the adjustment plate 1401, and the cylinder 1404 is electrically connected to the control unit. By utilizing the extension and contraction of the cylinder 1404, the angle of the adjustment plate 1401 can be flexibly adjusted.

[0086] Specifically, a convergence chamber 1405 is provided in the regulating plate 1401, and a gas pipe 1301 is connected between the high-pressure tank 13 and the convergence chamber 1405, and the smoke stored in the high-pressure tank 13 can enter the convergence chamber 1405 through the gas pipe 1301. A control valve is provided on the gas pipe 1301 to control the on and off of the gas pipe 1301. When the control valve on the gas pipe 1301 is opened, the smoke stored in the high-pressure tank 13 can quickly enter the convergence chamber 1405 through the gas pipe 1301.

[0087] like Figures 5 to 11As shown, a cavity 1406 is provided in the adjustment plate 1401, and the cavity 1406 is used to install a nozzle. A plurality of nozzles are installed in the cavity 1406, and the nozzles are connected to the convergence cavity 1405. The smoke in the convergence cavity 1405 is sprayed into the combustion cavity 901 through the nozzle, thereby accelerating the gas flow rate in the combustion cavity 901, so that the smoke in the combustion cavity 901 can be quickly discharged, so that the staff can open the cover door to observe the communication harness in time, thereby greatly improving the combustion test efficiency of the communication harness.

[0088] The port of the cavity 1406 is covered with a blocking plate 1407, which can protect the nozzle and prevent the nozzle from being blocked by impurities in the combustion flue gas. A pair of linkage rods 1408 are slidably connected between the blocking plate 1407 and the adjustment plate 1401, and the blocking plate 1407 and the adjustment plate 1401 can be connected by the linkage rods 1408.

[0089] In addition, a pair of accommodating cavities 1409 are provided in the adjusting plate 1401, a pair of linkage rods 1408 are respectively slidably provided in the pair of accommodating cavities 1409, and an elastic rope 1410 is connected between the linkage rods 1408 and the inner wall of the accommodating cavity 1409. When the nozzle does not spray gas, the blocking plate 1407 is covered in the cavity 1406 under the action of the elastic rope 1410 to protect the nozzle.

[0090] When the nozzle sprays gas, the blocking plate 1407 is separated from the covering of the cavity 1406 under the impact force of the gas, and the linkage rod 1408 slides in the accommodating cavity 1409. At this time, the elastic rope 1410 is in a stretched state.

[0091] Specifically, an air outlet cavity 1411 is provided in one of the linkage rods 1408, and an air outlet hole 1412 is provided on the linkage rod 1408, and the air outlet cavity 1411 is connected to the outside through the air outlet hole 1412. When the blocking plate 1407 is away from the cavity 1406, the air outlet hole 1412 is not blocked, and the gel liquid stored in the liquid storage tank 15 enters the accommodating cavity 1409 through the delivery pipe 1501, and then enters the air outlet cavity 1411, and is discharged through the air outlet hole 1412. As the nozzle sprays gas, the gas diffuses to the surroundings under the obstruction of the blocking plate 1407, and part of the diffused gas will blow away the gel liquid, causing the gel liquid to become small droplets. The small droplets of gel liquid entering the combustion chamber 901 will wrap the pollutants in the flue gas, thereby further purifying the flue gas.

[0092] Specifically, a liquid storage tank 15 is installed in the combustion box 9, and gel liquid is stored in the liquid storage tank 15. A delivery pipe 1501 is connected between the liquid storage tank 15 and the accommodating chamber 1409. When the sealing plate 1407 is separated from the covering of the cavity 1406, the gel liquid stored in the liquid storage tank 15 can enter the accommodating chamber 1409 through the delivery pipe 1501, and then enter the air outlet chamber 1411, and be discharged through the air outlet hole 1412.

[0093] When the communication harness is subjected to a combustion test, the cover door is opened, the sliding plate 1002 is pulled out, and the communication harness to be tested is fixed between a pair of clamping members 1005. The screw 1006 is rotated, and the screw 1006 drives the clamping plate 1007 to approach the clamping member 1005, and the communication harness can be clamped and fixed in cooperation with the elastic member 1008. The sliding plate 1002 is pushed back into the combustion chamber 901, and the cover door is closed.

[0094] The burner 902 is operated by the control unit, and the burner 902 is ignited and burned, thereby performing a combustion test on the communication harness.

[0095] If the communication harness produces a lot of black smoke or catches fire during the combustion test, it indicates that the quality of the prepared communication harness is unqualified. If the communication harness does not produce smoke or burn during the combustion test, it indicates that the quality of the prepared communication harness is qualified.

[0096] During the combustion test of the communication harness, the air pump 11 needs to be operated. The air pump 11 can form a negative pressure in the filter chamber 903, so that the combustion flue gas in the combustion chamber 901 can enter the filter chamber 903 through the through hole and be filtered through the filter bag 904. The filtered flue gas will flow into the cooling pipe 1201. Since the cooling box 12 stores low-temperature coolant, the high-temperature flue gas will exchange heat with the low-temperature coolant when flowing in the cooling pipe 1201, thereby reducing the temperature of the flue gas and avoiding the high temperature phenomenon when the flue gas is discharged from the cooling box 12.

[0097] The flue gas after cooling will eventually enter the high-pressure tank 13 for storage for subsequent use of the flue gas.

[0098] After the communication harness combustion test is completed, the burner 902 is turned off, and the control valve on the gas pipe 1301 is opened, so that the smoke stored in the high-pressure tank 13 can quickly enter the convergence chamber 1405 through the gas pipe 1301. The smoke in the convergence chamber 1405 is first sprayed toward the blocking plate 1407 through the nozzle. When the force of the smoke on the blocking plate 1407 is greater than the force of the elastic rope 1410 on the linkage rod 1408, the blocking plate 1407 moves and leaves the cavity 1406.

[0099] At this time, the smoke in the convergence chamber 1405 is sprayed into the combustion chamber 901 through the nozzle, which can accelerate the gas flow rate in the combustion chamber 901, so that the smoke in the combustion chamber 901 can be quickly discharged, so that the staff can open the cover door and observe the communication harness in time, thereby greatly improving the combustion test efficiency of the communication harness.

[0100] When the blocking plate 1407 is separated from the cavity 1406, the air outlet 1412 is not blocked, and the gel liquid stored in the liquid storage tank 15 can enter the containing cavity 1409 through the delivery pipe 1501, and then enter the air outlet cavity 1411, and be discharged through the air outlet 1412. When the gas is sprayed into the combustion chamber 901, the gas will be blocked by the blocking plate 1407 and diffuse around the blocking plate 1407. Part of the diffused gas will blow away the gel liquid discharged from the air outlet 1412, making the gel liquid into small droplets. The small droplets of gel liquid entering the combustion chamber 901 will wrap the pollutants in the smoke, thereby further purifying the smoke.

[0101] When the force of smoke on the blocking plate 1407 is less than the force of the elastic rope 1410 on the linkage rod 1408, the blocking plate 1407 moves and covers the cavity 1406. At this time, the nozzle will not spray gas into the combustion chamber 901, and the gas outlet 1412 will not discharge the gel liquid.

[0102] Open the cover door, remove the communication harness fixed on the cable fixing mechanism 10, and then observe the combustion test result of the communication harness.

[0103] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0104] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An electric vehicle communication harness, characterized in that: It comprises a guide core, a plurality of cables are wound and connected on the outside of the guide core, a wrapping layer is covered on the outside of the cable, a plurality of flame retardant layers are wound and connected on the outside of the wrapping layer, a metal mesh layer is covered on the outside of the flame retardant layer, flame retardant cotton is filled between the wrapping layer and the metal mesh layer, a first rubber layer is covered on the outside of the metal mesh layer, one end of the first rubber layer is connected to a communication terminal, and the communication terminal is connected to the cable; The flame retardant layer comprises a winding shell, the winding shell and the wrapping layer are bonded and connected by adhesive, the winding shell is filled with dry powder, a plurality of heat-conducting metal wires are embedded in the side wall of the winding shell, the adhesive is epoxy resin glue, and the dry powder is one of ammonium phosphate, sodium bicarbonate, sodium chloride, and potassium chloride; The preparation process of the electric vehicle communication harness is as follows: S1. Weigh various raw materials for the second rubber layer according to the proportion, stir them evenly, and repeatedly roll the raw materials with a rolling device to form a soft rubber mixture; S2, putting the soft rubber mixture into an extruder for extrusion molding, and coating the guide core, and making the cable after being solidified by coolant; S3, after the cable is circumferentially wound around the guide core, it is wrapped with a wrapping layer to make a wire harness; S4, after the flame retardant layer is wound around the wire harness, the flame retardant cotton is wrapped around the outside of the flame retardant layer, and the flame retardant cotton and the flame retardant layer are wrapped with a metal mesh layer; S5. Extrude the remaining soft rubber mixture in S2 into a mold and fully cover the metal mesh layer, then solidify it in an oven. After cooling with coolant, conduct leakage and combustion tests. If the test results are qualified, the finished product can be obtained.

2. The electric vehicle communication harness according to claim 1, characterized in that: The cable comprises a conductor core and a second rubber layer, wherein the second rubber layer is made from the following components: 70-90 parts of α, ω-dihydroxy polydimethylsiloxane, 60-72 parts of aluminum hydroxide, 0.6-3.5 parts of carbon black, 12-18 parts of dimethyl silicone oil, 20-28 parts of a crosslinking agent, 6-9 parts of a silane coupling agent and 2-3 parts of a catalyst.

3. The electric vehicle communication harness according to claim 1, characterized in that: In S5, the combustion test equipment includes a combustion box, wherein a combustion chamber is provided in the combustion box, a burner is installed on the bottom wall of the combustion chamber, and a cover door is hingedly connected to the combustion box, and the cover door corresponds to the combustion chamber.

4. The electric vehicle communication harness according to claim 3, characterized in that: A cable fixing mechanism is installed on the side wall of the combustion chamber, and the cable fixing mechanism includes a guide rail, a sliding plate is slidably provided on the guide rail, a mounting plate is slidably provided on the sliding plate, a pair of support rods are fixedly connected to the mounting plate, a clamping piece is fixedly connected to the support rods, a screw is threadedly connected to the clamping piece, a clamping plate is rotatably connected to the screw, and elastic pieces are installed on both the clamping piece and the clamping plate.

5. The electric vehicle communication harness according to claim 4, characterized in that: A filter cavity is provided in the combustion box, a filter bag is installed in the filter cavity, the filter cavity is connected with the combustion cavity through a plurality of through holes, an air suction pump is installed in the combustion box, and an air suction end of the air suction pump is arranged in the filter cavity.

6. The electric vehicle communication harness according to claim 5, characterized in that: A cooling box is installed in the combustion box, a coolant is arranged in the cooling box, a cooling pipe is arranged in the cooling box, and the cooling pipe is connected with the air outlet end of the air suction pump.

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