CN212671897U - Self-control type heating urea pipeline for diesel engine aftertreatment - Google Patents
Self-control type heating urea pipeline for diesel engine aftertreatment Download PDFInfo
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- CN212671897U CN212671897U CN201920888405.1U CN201920888405U CN212671897U CN 212671897 U CN212671897 U CN 212671897U CN 201920888405 U CN201920888405 U CN 201920888405U CN 212671897 U CN212671897 U CN 212671897U
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Abstract
A self-control heating urea pipeline for diesel engine aftertreatment comprises a urea pipeline, a circuit board, a heating element, a power supply wire harness and a control circuit; the circuit board is assembled at the joint of the urea pipeline in a press-fitting manner; the heating element and the control circuit are both assembled on the circuit board; the circuit board is connected with a power supply through a power supply wiring harness; the circuit board is of a U-shaped structure, and a wiring terminal connected with a power supply is arranged on the back of the circuit board. The utility model discloses not only can promote heating line's preparation and processing work efficiency by a wide margin, still have the protection system of certain control by temperature change, make diesel engine after-treatment system can be safer, more effectual carry out catalytic reduction reaction to engine exhaust to reach the purpose of atmospheric environment protection.
Description
Technical Field
The utility model provides a heating pipe automatic control device, especially an automatic control device detection device suitable for diesel engine aftertreatment heating pipe belongs to automobile accessory technical field.
Background
With the continuous development of the automobile industry, the existing automobile types can be roughly classified into gasoline automobiles, new energy automobiles and diesel automobiles. Wherein, diesel automobile all can be equipped with diesel engine aftertreatment system on diesel automobile for the emission pollution of reduction tail gas, be used for carrying out SCR (selective catalytic reduction) catalytic reduction reaction to the tail gas that discharges to make the tail gas of discharging accord with emission standard, prevent to cause the pollution to the atmospheric environment. A urea pipeline in a diesel engine post-treatment system is provided with a heating pipe for heating supplied urea liquid so as to avoid the phenomenon that the urea liquid volatilizes or freezes due to the temperature problem. However, most urea pipelines in the market at present do not have a temperature control system, and are heated by adopting a mode of being directly connected with a power line, and once a heating pipe is heated to an over-high temperature, metering injection failure or inaccurate metering can be caused, so that the reaction of Selective Catalytic Reduction (SCR) is insufficient, and the tail gas emission does not reach the standard; or when the temperature is too low, the urea solution blocks a conveying pipeline due to icing, so that the SCR system fails. Therefore, how to accurately control the temperature of the heating pipeline and enable the urea solution to perform selective catalytic reduction in a relatively stable temperature interval becomes a research hotspot of the industry.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art's not enough, provide a simple structure, the assembly is swift, can also carry out temperature control to the heating pipe in the urea pipeline effectively, makes it can keep in specific temperature interval.
The problem is solved through following technical scheme:
a self-control heating urea pipeline for diesel engine aftertreatment comprises a urea pipeline, a circuit board, a heating element, a power supply wire harness and a control circuit; the circuit board is assembled at a quick joint of the urea pipeline in a press-fitting manner; the heating element and the control circuit are both assembled on the circuit board; the circuit board is connected with a power supply through a power supply wiring harness; the circuit board is of a U-shaped structure, and a wiring terminal connected with a power supply is arranged on the back of the circuit board.
The self-control heating urea pipeline for the diesel engine aftertreatment comprises a control circuit, a control circuit and a control circuit, wherein the control circuit comprises a CPU, a temperature sensor, a current sensor, a relay and a triode; the temperature sensor and the current sensor are respectively connected with the P1.0 end and the P1.2 end of the CPU; the base electrode of the triode is connected with the P2.0 end of the CPU, the emitting electrode is grounded, and the collector electrode is connected with the power supply through the relay; and the first normally open control contact of the relay is connected with the power supply after being connected with the heating element in series.
The self-control heating urea pipeline for the diesel engine aftertreatment is characterized in that the heating elements are thermistors which are arranged in a plurality of groups and are respectively connected with normally open control contacts on a relay.
The self-control heating urea pipeline for the diesel engine aftertreatment comprises a thermistor, a heating substrate, a heat conducting fin and a coating, wherein the thermistor comprises a heating substrate, a heat conducting fin and a coating; the cross section of the heat conduction fin is triangular, and two sides of the heat conduction fin are connected with the heating substrate; the heat conducting fins are arranged into a plurality of groups and are uniformly distributed on the heating substrate; the coating is smeared between each heat conduction fin and the heating substrate.
The self-control heating urea pipeline for the diesel engine aftertreatment is characterized in that the outer contour of the connecting terminal is a U-shaped groove, and a pin of the connecting terminal is connected with a circuit board and soldered.
The self-control heating urea pipeline for the diesel engine aftertreatment is characterized in that a dustproof cover is arranged at the joint end of the urea pipeline.
The utility model integrates the heating element and the control circuit on the circuit board, and sets the circuit board into a U-shaped structure, so as to be capable of quickly inserting the joint of the urea pipeline, and fasten the urea pipeline by utilizing the interference fit principle, thereby realizing the purpose of quick assembly, and not only effectively ensuring the operating efficiency when assembling the workpiece; the heating temperature and the current of the urea pipeline can be acquired in real time through the control circuit arranged on the circuit board, and then the control circuit controls the heating element, so that the heating temperature is always kept in a certain temperature interval, the heating element can work at constant power, and the phenomenon that the urea liquid in the urea pipeline volatilizes or freezes due to the fact that the temperature changes irregularly is prevented.
The utility model discloses not only can improve the preparation and the processing work efficiency of urea pipeline by a wide margin, still have certain control by temperature change protect function, can make diesel engine after-treatment system can be safer, more effectual carry out catalytic reduction reaction to engine exhaust to reach the purpose of atmospheric environment protection.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic diagram of a circuit board structure in the present invention; (not drawn to scale)
FIG. 3 is a schematic view of the structure of FIG. 2; (not drawn to scale)
Fig. 4 is a schematic structural view of a heating element according to the present invention;
FIG. 5 is a side view of FIG. 4;
fig. 6 is an electrical schematic diagram of the control circuit of the present invention.
In the drawings, the respective reference numerals denote: 1. the novel heat-insulation and heat-insulation integrated circuit comprises a dust cover, 2 quick-plug connectors, 3 injection molded bodies, 4 power wiring harnesses, 5 corrugated pipes, 6 wiring terminals, 7 circuit boards, 7-1 first clamping positions, 7-2 second clamping positions, 8 heating elements, 9 urea pipelines, 10 CPUs, 11 peripheral keyboard ports, 12 heating substrates, 13 heat-conducting fins, 14 coatings, C current sensors, U temperature sensors, Q, triodes, J relays, J-1 first relay normally-open control contacts and PTC thermistors.
Detailed Description
Referring to fig. 1, 2, 3, 4, 5 and 6, the present invention includes a urea pipeline 9, a circuit board 7, a heating element 8, a power harness 4 and a control circuit; the circuit board 7 is pressed and installed at the connection position of the urea pipeline and the quick connector in an interference fit manner; the heating element 8 and the control circuit are both assembled on the circuit board 7 and form a loop; the circuit board 7 is in a U-shaped structure so as to be conveniently and quickly inserted on the urea pipeline, and a wiring terminal 6 connected with a power supply is further arranged on the back plate of the circuit board. The outline of the wiring terminal 6 is a U-shaped groove so as to be connected and fastened with a power line, and pins of the wiring terminal 6 are electrically connected with the circuit board 7 and subjected to soldering treatment. The bayonet of the circuit board 7 is provided with a first clamping position 7-1 and a second clamping position 7-2, and the distance between the relative positions of the first clamping position 7-1 is smaller than the distance between the relative positions of the second clamping position 7-2, so that the two clamping positions are formed, and the urea pipeline can be more stably inserted.
In addition, the control circuit in the utility model comprises a CPU10, a temperature sensor U, a current sensor C, a relay J and a triode Q; the temperature sensor U and the current sensor C are respectively connected with the P1.0 end and the P1.2 end of the CPU; the base electrode of the triode Q is connected with the P2.0 end of the CPU, the emitting electrode is grounded, and the collecting electrode is connected with the power supply through the relay J; and a first relay normally-open control contact J-1 of the relay J is connected with the heating element in series and then is connected with a power supply. The heating member 8 is a thermistor PTC, the thermistor PTC sets up into a plurality of groups, and is connected with normally open control contact on the relay J respectively, and the temperature sensor U is located on the heating member. The peripheral keyboard port is connected with the P2.1 end of the CPU and used for inputting control instructions.
The heating element 8 used in the utility model is a thermistor PTC heating chip, which can uniformly heat the pipeline, avoid the defect of reducing the atomization of the urea solution caused by uneven heating, and comprises a heating substrate 12, a heat conducting fin 13 and a coating 14; the cross section of the heat conduction fin 13 is triangular, and two sides of the heat conduction fin are connected with the heating substrate 12, so that the heat conduction fin with the structure can better disperse and transfer heat energy, reduce the volume of a heating body and save installation space. The heat conducting fins 13 are arranged into a plurality of groups and are uniformly distributed on the heating substrate 12; the coating 14 is coated between each heat conduction fin and the heating substrate.
Additionally, the utility model discloses in order to avoid quick connector 2 to get into the dust placing the in-process, and the jam pipeline phenomenon that causes takes place, still be equipped with shield 1 to prevent that dust or other debris from blockking up the joint.
The utility model provides a control circuit and heating member on circuit board and the circuit board all wrap in an organic whole through injection molding body and urea pipeline to safety when the guarantee uses. The urea pipeline is also covered with a corrugated pipe.
Claims (6)
1. The utility model provides a diesel engine aftertreatment is with automatic control formula heating urea pipeline which characterized in that: the device comprises a urea pipeline (9), a circuit board (7), a heating element (8), a power supply wire harness (4) and a control circuit; the circuit board (7) is assembled at the quick connector (2) of the urea pipeline (9) in a press-fitting manner; the heating element (8) and the control circuit are both assembled on the circuit board (7); the circuit board (7) is connected with a power supply through a power supply wire harness (4); the circuit board (7) is of a U-shaped structure, and a wiring terminal (6) connected with a power supply is arranged on the back of the circuit board (7).
2. The self-heating urea line for diesel engine aftertreatment of claim 1, wherein: the control circuit comprises a CPU (10), a temperature sensor (U), a current sensor (C), a relay (J) and a triode (Q); the temperature sensor (U) and the current sensor (C) are respectively connected with the P1.0 end and the P1.2 end of the CPU; the base electrode of the triode (Q) is connected with the P2.0 end of the CPU, the emitting electrode is grounded, and the collector electrode is connected with a power supply through a relay (J); and a first relay normally open control contact (J-1) of the relay (J) is connected with the heating element in series and then is connected with a power supply.
3. The self-heating urea line for diesel engine aftertreatment of claim 2, wherein: the heating element (8) is a thermistor (PTC), and the thermistors (PTC) are arranged into a plurality of groups and are respectively connected with normally open control contacts on the relay (J).
4. The self-heating urea line for diesel engine aftertreatment of claim 3, wherein: the thermistor (PTC) comprises a heating substrate (12), a heat-conducting fin (13) and a coating (14); the cross section of the heat conduction fin (13) is triangular, and two sides of the heat conduction fin are connected with the heating substrate (12); the heat conducting fins (13) are arranged into a plurality of groups and are uniformly distributed on the heating substrate (12); the coating (14) is coated between each heat conduction fin and the heating substrate.
5. The self-heating urea line for diesel engine aftertreatment of claim 4, wherein: the outer contour of the wiring terminal (6) is a U-shaped groove, and pins of the wiring terminal are electrically connected with the circuit board (7) and soldered.
6. The self-heating urea line for diesel engine aftertreatment of claim 5, wherein: the quick connector (2) is also provided with a dustproof cover (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920888405.1U CN212671897U (en) | 2019-06-13 | 2019-06-13 | Self-control type heating urea pipeline for diesel engine aftertreatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920888405.1U CN212671897U (en) | 2019-06-13 | 2019-06-13 | Self-control type heating urea pipeline for diesel engine aftertreatment |
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| Publication Number | Publication Date |
|---|---|
| CN212671897U true CN212671897U (en) | 2021-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920888405.1U Active CN212671897U (en) | 2019-06-13 | 2019-06-13 | Self-control type heating urea pipeline for diesel engine aftertreatment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110185522A (en) * | 2019-06-13 | 2019-08-30 | 河北亚大汽车塑料制品有限公司 | A kind of diesel engine post-processing autocontrol heating urea pipeline |
-
2019
- 2019-06-13 CN CN201920888405.1U patent/CN212671897U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110185522A (en) * | 2019-06-13 | 2019-08-30 | 河北亚大汽车塑料制品有限公司 | A kind of diesel engine post-processing autocontrol heating urea pipeline |
| CN110185522B (en) * | 2019-06-13 | 2024-03-29 | 河北亚大汽车塑料制品有限公司 | Self-control type heating urea pipeline for diesel engine aftertreatment |
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