Module-detachable urea spraying device

Abstract

The utility model discloses a module detachable type urea spraying device, including urea pump assembly and coil pipe assembly, urea pump assembly includes first shell, its top surface is detachably equipped with controller, second shell, third shell, second shell is provided with gear pump inside, the gear pump is communicated with urea spray pipe, and the coil pipe assembly is equipped with the third shell. A filter element is mounted in the third shell; the coil pipe assembly comprises a urea pipe detachably installed at the bottom of the first shell, the two ends of the urea pipe are communicated with a urea tank and the filter element respectively, and the filter element is further communicated with the gear pump. The controller, the second shell, the third shell and the urea pipe are detachably installed on the first shell to be assembled into the urea spraying device, due to the detachable arrangement, all the components can be independently disassembled, when a certain component is damaged or breaks down, the component can be independently disassembled, the component can be replaced or maintained according to the actual situation, and the maintenance cost is reduced. The maintenance cost and the maintenance time are reduced.

Description

Technical Field

[0001] This utility model relates to the field of automotive exhaust gas treatment technology. More specifically, this utility model relates to a modularly detachable urea injection device. Background Technology

[0002] Diesel engine vehicles produce exhaust containing large amounts of nitrogen oxides (NOx), which are extremely harmful to the environment. To meet increasingly stringent emission requirements and reduce NOx emissions, it is necessary to reduce NOx in the exhaust into nitrogen and water. Typically, this is achieved by injecting a urea solution as a reducing agent into the exhaust before it enters the catalytic converter. However, most commonly used urea injection devices are integrated structures. When certain components malfunction or require maintenance, the entire device needs to be replaced, which is costly and difficult to repair. Summary of the Invention

[0003] Another objective of this invention is to provide a modular detachable urea injection device. The components of the urea injection device are detachable. When a component is damaged or malfunctions, it can be removed individually and replaced or repaired according to the actual situation, thereby reducing maintenance costs and time.

[0004] To achieve these objectives and other advantages according to the present invention, a modularly detachable urea injection device is provided, comprising a urea pump assembly and a coil assembly. The urea pump assembly includes a first housing, on the top surface of which a controller, a second housing, and a third housing are detachably mounted. A gear pump electrically connected to the controller is disposed within the second housing, and the gear pump is connected to one end of a urea injection pipe. The other end of the urea injection pipe extends out of the second housing. A filter element is installed within the third housing. The coil assembly includes a detachably mounted urea pipe at the bottom of the first housing. Both ends of the urea pipe are connected to a urea tank and one end of the filter element, respectively. The other end of the filter element is connected to the gear pump via a connecting pipe.

[0005] Preferably, the first housing is detachably equipped with an inlet pipe and an outlet pipe connected to the gear pump; the coil assembly also includes a coil, which is disposed at the bottom of the first housing and extends into the urea tank, the two ends of the inlet pipe are respectively connected to the engine coolant pipe and one end of the coil, the other end of the coil is connected to the outlet pipe through the gear pump, and a water valve electrically connected to the controller is installed on the inlet pipe.

[0006] Preferably, the filter element divides the interior of the third housing into a first chamber located inside the filter element and a second chamber located outside the filter element. The two ends of the first chamber are respectively connected to the urea pipe and the connecting pipe. The connecting end of the coil and the gear pump is connected to the second chamber. The engine's cooling water flows into the second chamber through the coil and is then pumped into the outlet pipe by the gear pump.

[0007] Preferably, the urea tube and the coil are fixedly mounted on the coil housing, and the coil housing is detachably mounted on the bottom of the first housing.

[0008] Preferably, the coil is spirally wound around the outer periphery of the urea tube.

[0009] Preferably, a heat-conducting sleeve is provided around the outer periphery of the connecting pipe.

[0010] Preferably, a pressure sensor is installed on the urea nozzle, and the pressure sensor is electrically connected to the controller.

[0011] Preferably, the bottom of the coil assembly is also provided with a level sensor, a temperature sensor, and a quality sensor that are electrically connected to the controller.

[0012] The present invention has at least the following beneficial effects: The controller, second housing, third housing, and urea tube of the present invention are detachably installed on the first housing to form a urea injection device. The detachable design allows each component of the urea injection device to be disassembled individually. When a component is damaged or malfunctions, the component can be removed individually and replaced or repaired according to the actual situation, which can reduce maintenance costs and maintenance time. Furthermore, the gear pump and filter element are installed in the corresponding housings, and the housings can protect the above-mentioned components and extend the service life of the device.

[0013] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0014] Figure 1 This is a side view of a modular detachable urea injection device according to an embodiment of the present invention.

[0015] Figure 2 This is a top view of the modular detachable urea injection device described in the above embodiments;

[0016] Figure 3 This is a schematic diagram of the coil assembly described in the above embodiments;

[0017] Explanation of reference numerals in the instruction manual:

[0018] 1. Pump assembly; 2. Coil assembly; 201. Coil housing; 202. Urea pipe; 203. Coil; 3. First housing; 301. Inlet pipe; 302. Outlet pipe; 303. Water valve; 4. Second housing; 401. Gear pump; 402. Urea nozzle; 403. Pressure sensor; 5. Third housing; 501. Filter element; 502. Second chamber; 6. Controller; 7. Liquid level sensor; 8. Temperature sensor; 9. Quality sensor. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0020] It should be noted that in the description of this utility model, the terms "horizontal", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] like Figure 1-3 As shown, this utility model provides a modular detachable urea injection device, including a urea pump assembly 1 and a coil assembly 2. The urea pump assembly 1 includes a first housing 3, on the top surface of which a controller 6, a second housing 4, and a third housing 5 are detachably mounted. A gear pump 401 electrically connected to the controller 6 is disposed inside the second housing 4. One end of the gear pump 401 is connected to a urea injection pipe 402, and the other end of the urea injection pipe 402 extends out of the second housing 4. A filter element 501 is installed inside the third housing 5. The coil assembly 2 includes a detachable urea pipe 202 installed at the bottom of the first housing 3. Both ends of the urea pipe 202 are connected to a urea tank and one end of the filter element 501, respectively. The other end of the filter element 501 is connected to the gear pump 401 through a connecting pipe.

[0022] In the above technical solutions, such as Figure 2As shown, the first housing 3 serves as the mounting base for the various components of the urea injection device. The controller 6, the second housing 4, and the third housing 5 are detachably mounted to the top surface of the first housing 3 via bolts. The second housing 4 and the third housing 5 are arranged adjacent to each other. The gear pump 401 is installed inside the second housing 4 and communicates with the urea injection pipe 402 and the filter element 501 inside the third housing 5. Flow channel holes can be correspondingly opened at the bottom of the first housing 3, the third housing 5, and the filter element 501. One end of the urea pipe 202 can be detachably mounted to the flow channel hole at the bottom of the first housing 3 via bolts, and the urea pipe 202 communicates with the filter element 501 through the flow channel holes on the third housing 5 and the filter element 501. The other end of the urea pipe 202 extends into the urea tank. The working process of the urea injection device is as follows: The engine ECU sends a signal to the controller 6, and the controller 6 controls the gear pump 401 to start, injecting urea into the urea tank. The aqueous solution provides pressure, and the urea solution in the urea tank enters the filter element 501 through the urea pipe 202. After being filtered by the filter element 501, it enters the gear pump 401 through the connecting pipe. The gear pump 401 pumps the solution to the urea spray pipe 402, and then sprays it into the engine exhaust pipe for exhaust gas treatment. The controller 6, the second housing 4, the third housing 5, and the urea pipe 202 of this utility model are bolted to the first housing 3 to form a urea injection device. The detachable design allows each component of the urea injection device to be disassembled individually. When a component is damaged or malfunctions, it can be removed individually and replaced or repaired according to the actual situation, which can reduce maintenance costs and maintenance time. Furthermore, the gear pump 401 and the filter element 501 are installed in their respective housings, which can protect the above-mentioned components and extend the service life of the device.

[0023] In another technical solution, an inlet pipe 301 and an outlet pipe 302 connected to the gear pump 401 are detachably installed on the first housing 3; the coil assembly 2 also includes a coil 203, which is disposed at the bottom of the first housing 3 and extends into the urea tank. The two ends of the inlet pipe 301 are respectively connected to the engine coolant pipe and one end of the coil 203. The other end of the coil 203 is connected to the outlet pipe 302 through the gear pump 401. A water valve 303 electrically connected to the controller 6 is installed on the inlet pipe 301.

[0024] In this technical solution, such as Figure 2 , Figure 3As shown, an inlet pipe 301 and an outlet pipe 302 are bolted onto the first housing 3. A coil 203 is bolted to the bottom of the first housing 3. The two ends of the coil 203 are connected to the inlet pipe 301 and the outlet pipe 302, respectively. The inlet pipe 301, the outlet pipe 302, and the coil 203 are used to realize the low-temperature defrosting function of the urea solution. Specifically, cooling water enters the coil 203 through the engine coolant pipe and the inlet pipe 301 to heat the urea solution in the urea tank. The heated cooling water, driven by the gear pump 401, flows back to the engine water jacket through the outlet pipe 302 to realize the circulating heating of the urea solution and prevent the urea solution from crystallizing in a low-temperature environment, thereby affecting the treatment effect on the exhaust gas. The water valve 303 is used to control the flow of cooling water.

[0025] In another technical solution, the filter element 501 divides the interior of the third housing 5 into a first chamber located inside the filter element 501 and a second chamber 502 located outside the filter element 501. The two ends of the first chamber are connected to the urea pipe 202 and the connecting pipe, respectively. The connecting end of the coil 203 and the gear pump 401 is connected to the second chamber 502. The engine cooling water flows into the second chamber 502 through the coil 203 and is then pumped into the outlet pipe 302 by the gear pump 401.

[0026] In this technical solution, such as Figure 2 As shown, the first chamber is the channel for the urea solution to flow into the filter element 501. Specifically, the urea solution in the urea tank enters the first chamber through the urea pipe 202, is filtered by the filter element 501, and then enters the gear pump 401 through the connecting pipe. The second chamber 502 is connected to the coil 203 and is used to heat the filter element 501 with cooling water to prevent the urea solution in the filter element 501 from crystallizing, thereby affecting the filtering effect of the filter element 501. Specifically, the cooling water first enters the coil 203 through the engine coolant pipe and the inlet pipe 301 to heat the urea solution in the urea tank. The heated cooling water, driven by the gear pump 401, first enters the second chamber 502 to heat the filter element 501 and then flows back to the engine water jacket through the outlet pipe 302.

[0027] In another technical solution, the urea tube 202 and the coil 203 are fixedly installed on the coil housing 201, and the coil housing 201 is detachably installed on the bottom of the first housing 3.

[0028] In this technical solution, such as Figure 3As shown, the urea pipe 202 and the coil 203 are mounted on the coil housing 201. The coil housing 201 is detachably mounted on the bottom of the first housing 3 by bolts. The detachable connection of the coil housing 201 allows the urea injection device to be replaced with a coil assembly 2 of appropriate length according to actual application. Through holes communicating with the coil 203 and the urea pipe 202 can be opened on the coil housing 201. Multiple fluid channels are opened on the first housing 3, the second housing 4, and the third housing 5. These multiple fluid channels are connected to the urea pipe 202. The coil 203, outlet pipe 302, inlet pipe 301, first chamber, and second chamber 502 are connected in a corresponding manner. Under the drive of gear pump 401, the urea aqueous solution is sprayed through urea pipe 202 and corresponding fluid channels. Cooling water is heated by the coil 203, outlet pipe 302, inlet pipe 301 and corresponding fluid channels to heat the urea aqueous solution in the urea tank and the filter element 501. By opening fluid channels on the shell, the setting of redundant pipelines is eliminated, resulting in higher integration.

[0029] In another technical solution, the coil 203 is spirally wound around the outer periphery of the urea tube 202.

[0030] In this technical solution, the coil 203 is arranged in a spiral manner, which can increase the heating area, improve the heating efficiency of urea aqueous solution, and shorten the heating time.

[0031] In another technical solution, a heat-conducting sleeve is provided around the outer periphery of the connecting pipe.

[0032] In this technical solution, the heat-conducting sleeve is used to heat the urea aqueous solution flowing from the first chamber into the gear pump 401, so as to ensure the normal flow of the urea aqueous solution and prevent the urea aqueous solution from crystallizing in a low-temperature environment, which would cause wear on the internal components of the gear pump 401.

[0033] In another technical solution, a pressure sensor 403 is installed on the urea nozzle 402, and the pressure sensor 403 is electrically connected to the controller 6.

[0034] In this technical solution, the pressure sensor 403 is used to monitor the pressure inside the urea nozzle 402 in real time and transmit the monitored data to the controller 6. The controller 6 adjusts the speed of the gear pump 401 in real time according to the data fed back by the pressure sensor 403, thereby adjusting the pressure of the extracted urea solution and realizing precise control of the pressure inside the urea nozzle 402, which effectively improves the accuracy of quantitative injection of urea solution. The controller 6 adopts the DCU controller 6.

[0035] In another technical solution, the bottom of the coil assembly 2 is also provided with a liquid level sensor 7, a temperature sensor 8 and a quality sensor 9 that are electrically connected to the controller 6.

[0036] In this technical solution, the level sensor 7, temperature sensor 8, and quality sensor 9 are used to collect the level data, temperature data, and concentration data of the urea solution in the urea tank, respectively, and feed the collected data back to the controller 6 in real time. When the engine ECU detects that exhaust gas treatment is required, the controller 6 determines that urea solution injection can be performed based on the received level data, temperature data, and concentration data, and controls the gear pump 401 to start, so that the urea solution is exported from the urea tank and sprayed out through the urea nozzle 402 for exhaust gas treatment.

[0037] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A modularly detachable urea injection device, characterized in that, The device includes a urea pump assembly and a coil assembly. The urea pump assembly includes a first housing, on the top surface of which a controller, a second housing, and a third housing are detachably mounted. A gear pump electrically connected to the controller is disposed inside the second housing. One end of the gear pump is connected to a urea spray nozzle, and the other end of the urea spray nozzle extends out of the second housing. A filter element is installed inside the third housing. The coil assembly includes a urea pipe detachably mounted at the bottom of the first housing. Both ends of the urea pipe are connected to a urea tank and one end of the filter element, respectively. The other end of the filter element is connected to the gear pump through a connecting pipe.

2. The modular detachable urea injection device as described in claim 1, characterized in that, The first housing is detachably equipped with an inlet pipe and an outlet pipe connected to the gear pump; the coil assembly also includes a coil, which is located at the bottom of the first housing and extends into the urea tank. The two ends of the inlet pipe are respectively connected to the engine coolant pipe and one end of the coil. The other end of the coil is connected to the outlet pipe through the gear pump. A water valve electrically connected to the controller is installed on the inlet pipe.

3. The modular detachable urea injection device as described in claim 2, characterized in that, The filter element divides the interior of the third housing into a first chamber located inside the filter element and a second chamber located outside the filter element. The two ends of the first chamber are connected to the urea pipe and the connecting pipe, respectively. The connecting end of the coil and the gear pump is connected to the second chamber. The engine's cooling water flows into the second chamber through the coil and is then pumped to the outlet pipe by the gear pump.

4. The modular detachable urea injection device as described in claim 2, characterized in that, The urea tube and the coil are fixedly installed on the coil housing, and the coil housing is detachably installed at the bottom of the first housing.

5. The modular detachable urea injection device as described in claim 2, characterized in that, The coil is spirally wound around the outer periphery of the urea tube.

6. The modular detachable urea injection device as described in claim 1, characterized in that, A heat-conducting sleeve is provided around the outer periphery of the connecting pipe.

7. The modular detachable urea injection device as described in claim 1, characterized in that, A pressure sensor is installed on the urea nozzle, and the pressure sensor is electrically connected to the controller.

8. The modular detachable urea injection device as described in claim 1, characterized in that, The bottom of the coil assembly is also equipped with a level sensor, a temperature sensor, and a quality sensor that are electrically connected to the controller.

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