Novel anti-crystallization nozzle structure

Abstract

The utility model discloses a novel anti-crystallization nozzle structure, which relates to the technical field of urea nozzles and comprises an exhaust pipe, a nozzle body is fixedly mounted in the middle of the top of the exhaust pipe, a heat preservation mechanism is fixedly mounted at the top of the exhaust pipe, and a heat conduction mechanism is fixedly connected to the outer surface of the exhaust pipe. By the adoption of the structure, the heat preservation mechanism and the heat conduction mechanism cooperatively operate, when a vehicle runs, the heat absorption coil pipe is sleeved outside the high-temperature exhaust pipe, heat of the exhaust pipe is efficiently conducted to the heat conduction medium in the coil pipe, the heated medium naturally ascends and flows into the heat preservation tank based on the heat rising and cold falling characteristics, and automatic temperature rising during running is achieved; the micro pump is started to pump the heated heat-conducting medium in the heat-insulating tank to the heat-conducting coil pipe, the heat-conducting coil pipe transfers heat to the heat-conducting sleeve to preserve heat of the nozzle body, crystallization in the nozzle caused by sudden drop of external temperature is effectively avoided, normal use and stable performance of the nozzle are greatly guaranteed, and reliable operation of the whole system is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of urea nozzles, and particularly relates to a novel crystallization-proof nozzle structure. Background Art

[0002] The urea injector is a crucial component in urea-SCR (Selective Catalytic Reduction) systems, such as those used in automobiles. It precisely injects urea solution into the exhaust gas stream. Typically installed at a specific location in the vehicle's exhaust pipe, generally before the catalytic converter, the injector's shape and size vary depending on the vehicle model and specific equipment. Its compact structure facilitates installation within limited spaces. Its sophisticated internal structure includes a nozzle and devices that control the urea solution injection volume, injection angle, and injection frequency. During operation, the injector receives signals from the vehicle's control system and precisely injects the appropriate amount and pattern of urea solution into the hot exhaust gas based on factors such as engine operating conditions, exhaust gas flow rate, and temperature. The urea solution decomposes in the exhaust gas to produce ammonia, which reacts with nitrogen oxides in the exhaust gas over the catalyst, converting harmful nitrogen oxides into nitrogen and water, effectively reducing the level of exhaust pollutants. The urea injector plays an indispensable role in the entire exhaust purification process.

[0003] A Chinese patent with the announcement number "CN216767520U" discloses a urea thermal insulation type urea nozzle, which includes an exhaust pipe and a first sleeve, wherein the first sleeve is located above the exhaust pipe. The utility model relates to the technical field of urea nozzles. The urea thermal insulation type urea nozzle starts the air pump and the urea delivery pump at the same time as starting the car, so that the air pump pushes the air storage pipe downward, thereby moving the second sleeve to the inside of the exhaust pipe, and triggering the trigger button to raise the heat shield, so that the atomizer atomizes and sprays the urea in the air storage pipe. After parking, the spring drives the second sleeve of the air storage pipe back to the outside of the exhaust pipe, and the heat shield is linked to descend to block the hot air in the exhaust pipe, thereby achieving the effect of insulating the atomizer when not in use, and avoiding the situation in which the urea remaining on the surface of the atomizer reacts with the hot air in the exhaust pipe to crystallize after the atomizer is used, resulting in the atomizer being blocked by crystals.

[0004] Under the above-mentioned existing technical conditions, when it is cold in winter, the urea nozzle is often prone to crystallization due to rapid cooling. The outside temperature in winter is extremely low. After the vehicle stops running, the temperature at its exhaust pipe will drop rapidly due to the low outside temperature. Under the influence of this low temperature environment, the fluidity of the urea solution deteriorates significantly. It is difficult to achieve uniform spraying of the solution inside the urea nozzle, and some urea will remain in the nozzle mouth or internal pipes. These residual urea will quickly crystallize in the low temperature environment. As time goes by, the crystals continue to accumulate and are likely to clog the nozzle. Once the nozzle is clogged, it will seriously affect the normal injection of urea, thereby reducing the working efficiency of the exhaust treatment system. This situation may even cause the vehicle exhaust emissions to exceed the standard, pollute the environment, and have adverse effects on the ecological environment. At the same time, it does not meet environmental protection requirements and vehicle operation standards and specifications, so it needs to be improved. Utility Model Content

[0005] In view of the problems mentioned in the background technology, the purpose of the present invention is to provide a new anti-crystallization nozzle structure to solve the problem in the prior art that urea is very likely to crystallize in the nozzle when the temperature is low.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A novel crystallization-proof nozzle structure includes an exhaust pipe, a nozzle body fixedly mounted in the middle of the top of the exhaust pipe, a heat preservation mechanism fixedly mounted on the top of the exhaust pipe, a heat conduction mechanism fixedly connected to the outer surface of the exhaust pipe, a temperature adjustment mechanism fixedly mounted on one side of the temperature insulation mechanism, the temperature insulation mechanism covering the outer surface of the nozzle body, the heat conduction mechanism and the temperature adjustment mechanism being connected, the temperature adjustment mechanism and the heat preservation mechanism being connected, and a urea delivery pipe fixedly mounted on one side of the upper end of the nozzle body;

[0008] The heat conduction mechanism includes a heat absorbing coil, which is fixedly installed on the outer surface of the exhaust pipe in a spiral shape. The output end of the heat absorbing coil is fixedly installed with an arc tube, which is connected to the interior of the temperature regulating mechanism.

[0009] As an optimal technical solution, a protective sleeve is fixedly installed on the outer surface of the exhaust pipe, and the protective sleeve is arranged on the outside of the heat absorbing coil.

[0010] As an optimal technical solution, the heat preservation mechanism includes a heat conducting sleeve, which is fixedly installed in the middle of the top of the exhaust pipe, and is sleeved on the outside of the nozzle body. The interior of the heat conducting sleeve is fixedly connected to a heat conducting coil, and the output end and input end of the heat conducting coil are both connected to the interior of the temperature control mechanism.

[0011] As a preferred technical solution, a thermal insulation sleeve is fixedly connected to the outer side of the thermal conductive sleeve, an aerogel thermal insulation layer is provided inside the thermal insulation sleeve, and the thermal insulation sleeve covers the outer surface of the thermal conductive sleeve.

[0012] As an optimal technical solution, the temperature control mechanism includes a mounting plate, which is fixedly installed in the middle of one side of the insulation sleeve, and an insulation tank is fixedly installed on the outside of the mounting plate. The input end of the insulation tank is connected to the output end of the heat-conducting coil, and a micro pump is fixedly installed on one side of the insulation tank. The output end of the micro pump is connected to the input end of the heat-conducting coil, the input end of the micro pump is connected to the inside of the insulation tank, and the bottom of the insulation tank is connected to the heat-absorbing coil.

[0013] As a preferred technical solution, a heating wire is fixedly connected to the interior of the heat preservation tank, and the heating wire is spirally arranged inside the heat preservation tank.

[0014] As a preferred technical solution, a temperature sensor is fixedly connected to the middle of the mounting plate, and a detection end of the temperature sensor is arranged inside the insulation tank.

[0015] In summary, the present invention has the following beneficial effects:

[0016] First, this device uses the heat preservation mechanism and the heat conduction mechanism to work together. When the vehicle is running, the heat absorbing coil is sheathed on the high-temperature exhaust pipe, and the heat of the exhaust pipe is efficiently transferred to the heat transfer medium in the coil. Based on the heat rise and cool drop characteristics, the heated medium naturally rises and flows into the heat preservation tank, realizing automatic temperature increase during driving. After the vehicle stops, the micro pump is started to pump the heated heat transfer medium in the heat preservation tank to the heat transfer coil. The heat transfer coil transfers heat to the heat transfer sleeve to keep the nozzle body warm, effectively avoiding crystallization inside the nozzle due to a sudden drop in external temperature, greatly ensuring the normal use and stable performance of the nozzle, and ensuring the reliable operation of the entire system;

[0017] Second, the device is equipped with a temperature control mechanism. Before the vehicle is driven, the user can start the heating wire in the insulation tank through the central control screen. After power is turned on, the heating wire heats up the heat-conducting medium, and then starts the micro pump to circulate the heated heat-conducting medium in the insulation tank and the heat-conducting sleeve, accurately transferring heat to the nozzle body, causing it to heat up quickly. This operation is of great significance. It can prevent the exhaust temperature from being low when the vehicle is started and the surrounding environment is cold, which reduces the solubility of the urea solution, causes the urea molecules to aggregate and then freeze and crystallize. The nozzle has a powerful anti-crystallization function, which effectively guarantees the stable operation of the vehicle's exhaust treatment system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2This is a schematic diagram of the top view of the structure of the utility model;

[0020] Figure 3 This is a front structural diagram of the utility model in a disassembled state;

[0021] Figure 4 It is a rear view structural schematic diagram of the utility model in a disassembled state.

[0022] Figure numerals: 1. exhaust pipe; 2. nozzle body; 3. heat preservation mechanism; 31. heat conducting sleeve; 32. heat preservation sleeve; 33. heat conducting coil; 4. urea delivery pipe; 5. heat conducting mechanism; 51. heat absorbing coil; 52. arc tube; 53. protective sleeve; 6. temperature regulating mechanism; 61. mounting plate; 62. heat preservation tank; 63. micro pump; 64. heating wire; 65. temperature sensor. DETAILED DESCRIPTION Example

[0023] refer to Figures 1 to 4 The present embodiment provides a novel crystallization-proof nozzle structure, comprising an exhaust pipe 1, a nozzle body 2 fixedly mounted in the middle of the top of the exhaust pipe 1, a heat preservation mechanism 3 fixedly mounted on the top of the exhaust pipe 1, a heat conduction mechanism 5 fixedly connected to the outer surface of the exhaust pipe 1, a temperature regulating mechanism 6 fixedly mounted on one side of the temperature preservation mechanism 3, the temperature preservation mechanism 3 covering the outer surface of the nozzle body 2, the heat conduction mechanism 5 and the temperature regulating mechanism 6 being connected, the temperature regulating mechanism 6 and the temperature preservation mechanism 3 being connected, and a urea delivery pipe 4 fixedly mounted on one side of the upper end of the nozzle body 2;

[0024] The heat conduction mechanism 5 includes a heat absorbing coil 51, which is fixedly installed on the outer surface of the exhaust pipe 1 in a spiral shape. The output end of the heat absorbing coil 51 is fixedly installed with an arc tube 52, and the output end of the arc tube 52 is connected to the interior of the temperature control mechanism 6. The nozzle body 2 in the middle of the top of the exhaust pipe 1 is used to achieve a specific function. The heat preservation mechanism 3 covered on its outer surface can effectively maintain the temperature and prevent heat loss, providing a stable working environment for the nozzle body 2, especially to ensure its performance under harsh conditions such as low temperature. The spiral heat absorbing coil 51 in the heat conduction mechanism 5 is tightly fixed to the outer surface of the exhaust pipe 1, which can absorb the heat emitted by the exhaust pipe 1 to the maximum extent and improve the heat collection efficiency. The arc tube 52 connects the heat absorbing coil 51 with the temperature regulating mechanism 6, so that the collected heat can be smoothly transferred to the temperature regulating mechanism 6 for further processing and utilization. The temperature regulating mechanism 6 is connected with the heat preservation mechanism 3 and the heat conducting mechanism 5 to form an organic whole, which can adjust the heat according to actual needs, ensuring that the entire system can provide suitable temperature conditions for the nozzle body 2 under different working conditions, improving the overall performance and reliability of the device, and also helping to extend the service life of the nozzle body 2, ensuring the stable operation of the entire system, and at the same time providing a good temperature basis for the transportation and subsequent treatment of urea, which is conducive to improving the efficiency and quality of related work such as exhaust gas treatment.

[0025] refer to Figures 1-4 A protective sleeve 53 is fixedly installed on the outer surface of the exhaust pipe 1. The protective sleeve 53 is arranged on the outside of the heat absorbing coil 51. The protective sleeve 53 fixedly installed on the outer surface of the exhaust pipe 1 has many advantages. First, it is arranged on the outside of the heat absorbing coil 51, which can provide a layer of physical protection for the heat absorbing coil 51. During the operation of the vehicle, the external environment is complex and there may be various foreign objects colliding or rubbing. The protective sleeve 53 can effectively prevent these factors from causing direct damage to the heat absorbing coil 51, thereby ensuring the structural integrity and normal function of the heat absorbing coil 51. Secondly, the protective sleeve 53 can play a certain heat insulation role, reduce the heat loss of the exhaust pipe 1 to the external environment, improve the heat utilization efficiency, and enable more heat to be absorbed by the heat absorbing coil 51 and used for subsequent insulation and temperature control, thereby improving the energy utilization efficiency of the entire device. In addition, the protective sleeve 53 can also play a certain protective role for the exhaust pipe 1, such as preventing the exhaust pipe 1 from being corroded by external chemicals, extending the service life of the exhaust pipe 1, and thus ensuring the stable operation and long-term reliability of the entire system.

[0026] refer to Figure 2-Figure 4 The heat preservation mechanism 3 includes a heat conducting sleeve 31, which is fixedly installed in the middle of the top of the exhaust pipe 1 and is sleeved on the outside of the nozzle body 2. The interior of the heat conducting sleeve 31 is fixedly connected with a heat conducting coil 33, and the output end and input end of the heat conducting coil 33 are both connected to the interior of the temperature regulating mechanism 6. The outside of the heat conducting sleeve 31 is fixedly connected with a heat preservation sleeve 32, and the interior of the heat preservation sleeve 32 is provided with an aerogel heat preservation layer. The heat preservation sleeve 32 covers the outer surface of the heat conducting sleeve 31. The heat conducting sleeve 31 is fixedly installed in the middle of the top of the exhaust pipe 1 and is sleeved on the outside of the nozzle body 2. It can directly receive heat from the exhaust pipe 1 and transfer it to the nozzle body 2, thereby realizing preliminary heat preservation and heating of the nozzle body 2. The internal heat conducting coil 33 is connected to the temperature regulating mechanism 6, so that The temperature-regulated medium can flow in the coil, further accurately adjusting the temperature of the thermal sleeve 31, providing a more stable and suitable temperature environment for the nozzle body 2. The aerogel insulation layer on the outside of the thermal insulation sleeve 32 has an extremely low thermal conductivity, which can greatly reduce heat loss and enhance the thermal insulation effect. Even in a low-temperature external environment, the temperature inside the thermal sleeve 31 can be effectively maintained to prevent the temperature of the nozzle body 2 from dropping too quickly. This multi-layer structure design, from heat transfer, precise temperature regulation to efficient thermal insulation, comprehensively guarantees the working temperature stability of the nozzle body 2, reduces the performance problems of the nozzle body 2 and the risk of urea crystallization caused by temperature changes, improves the reliability and durability of the entire system, and is conducive to the efficient operation of the vehicle exhaust treatment system.

[0027] refer to Figure 2-Figure 4The temperature regulating mechanism 6 includes a mounting plate 61, which is fixedly mounted on the middle part of one side of the heat-insulating sleeve 32, and a heat-insulating tank 62 is fixedly mounted on the outer side of the mounting plate 61, and the input end of the heat-insulating tank 62 is connected to the output end of the heat-conducting coil 33. A micro pump 63 is fixedly mounted on one side of the heat-insulating tank 62, and the output end of the micro pump 63 is connected to the input end of the heat-conducting coil 33. The input end of the micro pump 63 is connected to the interior of the heat-insulating tank 62, and the bottom of the heat-insulating tank 62 is connected to the heat-absorbing coil 51. The interior of the heat-insulating tank 62 is fixedly connected with a heating wire 64, which is spirally arranged inside the heat-insulating tank 62. A temperature sensor 65 is fixedly connected to the middle part of the mounting plate 61, and the detection end of the temperature sensor 65 is arranged inside the heat-insulating tank 62. The mounting plate 61 provides a stable mounting position for components such as the heat-insulating tank 62, ensuring the stability of the entire temperature regulating mechanism 6, and the heat-insulating tank 62 is connected to the heat-conducting coil 33, the heat-absorbing coil 51 and The connection design of the micro pump 63 is reasonable and efficient, realizing the storage and transmission cycle of heat. The micro pump 63 can accurately control the flow of the medium in the system and transport the medium in the insulation tank 62 to the heat conducting coil 33 as needed to realize the temperature regulation of the nozzle body 2. The spirally coiled heating wire 64 in the insulation tank 62 can evenly heat the medium in the tank, and can actively increase the medium temperature before the vehicle drives, etc., to preheat the nozzle body 2 in advance to avoid adverse effects in low temperature environments. The temperature sensor 65 monitors the internal temperature of the insulation tank 62 in real time, providing data support for precise control, making the temperature regulation process more accurate and reliable. This comprehensive design of the temperature regulation mechanism 6 can flexibly respond to temperature requirements under different working conditions, effectively ensuring that the nozzle body 2 is always in a suitable operating temperature range, improving the stability and adaptability of the entire system, and playing a key role in preventing urea crystallization and optimizing exhaust gas treatment effects.

[0028] Principle and advantages of use: Through the cooperation between the heat preservation mechanism 3 and the heat conduction mechanism 5, during the actual use of the device, when the vehicle is in motion, the heat absorbing coil 51 is tightly sleeved on the outer surface of the exhaust pipe 1. It should be noted that when the vehicle is running, the temperature of the exhaust pipe 1 can usually reach several hundred degrees. In this case, the large amount of heat generated by the exhaust pipe 1 can be efficiently conducted to the inside of the heat absorbing coil 51. Since the inside of the heat absorbing coil 51 and the heat conducting sleeve 31 are connected, with the continuous input of heat from the exhaust pipe 1, the temperature of the heat conducting medium inside the heat absorbing coil 51 rises rapidly. This is based on the natural characteristics that heat is transferred from bottom to top and cold air is transferred from bottom to bottom. As the heat absorbing coil 51 continuously absorbs heat, the heat conducting medium inside it After being heated, the heat will naturally flow upward through the arc tube 52 to the inside of the heat preservation tank 62. In this way, the heat-conducting medium inside the heat preservation tank 62 can be automatically heated during the driving of the vehicle. When the vehicle is finished driving, the user can start the micro pump 63. At this time, the micro pump 63 can pump the heated heat-conducting medium inside the heat preservation tank 62 and circulate it into the heat-conducting coil 33. Then, the heat-conducting coil 33 can transfer the heat to the heat-conducting sleeve 31. After the heat-conducting sleeve 31 is heated, it can further insulate the nozzle body 2. In this way, it can effectively avoid the crystallization inside the nozzle body 2 due to the rapid drop in external temperature after the vehicle stops, which greatly ensures the normal use and stable performance of the nozzle.

[0029] By setting the temperature regulating mechanism 6, during the use of the device, before the vehicle is driven, the user can start the operation of the heating wire 64 through the vehicle's central control screen. The heating wire 64 is located inside the heat preservation tank 62. When the heating wire 64 is energized, the heat preservation tank 62 can be heated. At this time, the heat-conducting medium inside the heat preservation tank 62 will be rapidly heated. Then, the micro pump 63 can be started to operate. The micro pump 63 will pump the heated heat-conducting medium inside the heat preservation tank 62 to circulate inside the heat preservation tank 62 and the heat-conducting sleeve 31. In this way, the heat generated by the heating wire 64 can be accurately transferred to the nozzle body 2, prompting the nozzle body 2 to quickly heat up. Temperature. It is of great significance to heat up the nozzle body 2 before the vehicle is driven. It can effectively avoid the situation where the exhaust temperature has not yet risen to a sufficiently high level when the vehicle is just started, and the cold environment around it will quickly take away the heat from the urea nozzle and the surrounding area. In this low temperature environment, the solubility of the urea solution will be greatly reduced, and the urea molecules originally dissolved in the solution will begin to aggregate. As the temperature continues to drop, the water in the urea solution will gradually freeze, and then form urea crystals. The nozzle structure can have a strong anti-crystallization function through such a design, which provides a strong guarantee for the stable operation of the vehicle exhaust treatment system.

Claims

1. A novel crystallization-proof nozzle structure, comprising an exhaust pipe (1), characterized in that: A nozzle body (2) is fixedly mounted in the middle of the top of the exhaust pipe (1), a heat preservation mechanism (3) is fixedly mounted on the top of the exhaust pipe (1), a heat conduction mechanism (5) is fixedly connected to the outer surface of the exhaust pipe (1), a temperature adjustment mechanism (6) is fixedly mounted on one side of the heat preservation mechanism (3), the heat preservation mechanism (3) is coated on the outer surface of the nozzle body (2), the heat conduction mechanism (5) and the temperature adjustment mechanism (6) are connected, the temperature adjustment mechanism (6) and the heat preservation mechanism (3) are connected, and a urea delivery pipe (4) is fixedly mounted on one side of the upper end of the nozzle body (2); The heat-conducting mechanism (5) comprises a heat-absorbing coil (51), which is fixedly mounted on the outer surface of the exhaust pipe (1) in a spiral shape. An arc-shaped tube (52) is fixedly mounted on the output end of the heat-absorbing coil (51), and the output end of the arc-shaped tube (52) is connected to the interior of the temperature-regulating mechanism (6).

2. The novel crystallization-preventing nozzle structure according to claim 1, characterized in that: A protective sleeve (53) is fixedly mounted on the outer surface of the exhaust pipe (1), and the protective sleeve (53) is arranged outside the heat absorbing coil (51).

3. The novel crystallization-preventing nozzle structure according to claim 1, characterized in that: The heat-insulating mechanism (3) comprises a heat-conducting sleeve (31), the heat-conducting sleeve (31) being fixedly mounted in the middle of the top of the exhaust pipe (1), the heat-conducting sleeve (31) being sleeved on the outside of the nozzle body (2), the interior of the heat-conducting sleeve (31) being fixedly connected with a heat-conducting coil (33), and the output end and the input end of the heat-conducting coil (33) being communicated with the interior of the temperature regulating mechanism (6).

4. The novel crystallization-preventing nozzle structure according to claim 3 is characterized in that: A heat-insulating sleeve (32) is fixedly connected to the outside of the heat-conducting sleeve (31), an aerogel heat-insulating layer is provided inside the heat-insulating sleeve (32), and the heat-insulating sleeve (32) covers the outer surface of the heat-conducting sleeve (31).

5. The novel crystallization-preventing nozzle structure according to claim 4 is characterized in that: The temperature regulating mechanism (6) comprises a mounting plate (61), the mounting plate (61) being fixedly mounted on the middle portion of one side of the heat-insulating sleeve (32), a heat-insulating tank (62) being fixedly mounted on the outer side of the mounting plate (61), an input end of the heat-insulating tank (62) being connected to an output end of the heat-conducting coil (33), a micro pump (63) being fixedly mounted on one side of the heat-insulating tank (62), an output end of the micro pump (63) being connected to an input end of the heat-conducting coil (33), an input end of the micro pump (63) being connected to the interior of the heat-insulating tank (62), and a bottom of the heat-insulating tank (62) being connected to the heat-absorbing coil (51).

6. The novel crystallization-preventing nozzle structure according to claim 5, characterized in that: The interior of the heat preservation tank (62) is fixedly connected with a heating wire (64), and the heating wire (64) is spirally arranged inside the heat preservation tank (62).

7. The novel crystallization-preventing nozzle structure according to claim 6, characterized in that: A temperature sensor (65) is fixedly connected to the middle of the mounting plate (61), and a detection end of the temperature sensor (65) is arranged inside the heat preservation tank (62).

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