Urea pipe with throttling effect

Abstract

The utility model relates to urea pipe technical field, concretely is a urea pipe with throttling effect, including urea tank, interface and connecting device, the interface is installed in the right side of urea tank, connecting device sets up in the right side of urea tank, and connecting device includes connecting block, and connecting block sets up in the right side of urea tank, and the inside of connecting block is provided with cavity, and the right side of connecting block is fixedly connected with liquid outlet, and the one end away from connecting block of liquid outlet is provided with urea pipe, and the surface of liquid outlet is provided with through -hole, and the inner wall of through -hole is fixedly connected with reflux pipe, and the other end of reflux pipe is fixedly connected with the inner wall of urea tank. The utility model discloses, through setting connecting device, prevent urea long -term stagnation in urea pipe, avoid the crystallization, the deposition problem of urea because of long -term standing in the pipe, to reduce urea pipe blockage risk further, both reduce the waste of urea, and prolong the service life of urea pipe and relevant injection components, effectively improve the practicability of equipment.

Description

Technical Field

[0001] This utility model relates to the field of urea tube technology, and in particular to a urea tube with a throttling effect. Background Technology

[0002] The function of a diesel engine exhaust gas treatment (SCR) system is to remove NOx from diesel engine exhaust. The system uses urea as a reducing agent; under the reduction action of a selective catalytic converter, NOx is reduced to nitrogen and water. The SCR system includes: a urea solution storage tank, a delivery system, a metering injection pump assembly, a catalytic converter, and temperature and exhaust gas sensors; the urea pipeline is a major and crucial component of the delivery system. The urea solution storage tank stores the urea solution; the metering injection pump assembly includes the metering injection pump and a controller. The metering injection pump delivers the urea solution at a certain pressure through the urea pipeline (pressure within the pipeline is 0.2 MPa). The controller communicates with the diesel engine ECU via the CAN bus to obtain diesel engine operating status information and values ​​from various sensors on the SCR system. Based on pre-calibrated pulse spectra, it calculates the urea injection quantity of the SCR system under actual diesel engine operating conditions, thereby reducing NOx components in the diesel engine exhaust.

[0003] Existing equipment, such as CN216866818U, describes a urea pipeline with a throttling function. It includes a throttling device whose inlet and outlet ends are connected to a urea pipe, making the two pipes a single unit. The throttling device includes a base with a liquid movement channel. The inlet and outlet ends are located at opposite ends of the liquid movement channel. A limiting block movement channel is also provided on the base, communicating with the liquid movement channel. The limiting block movement channel contains a limiting block and an elastic component. The limiting block has freedom of movement within the channel, and the elastic component provides pressure to the limiting block through pre-compression, causing the limiting block to extend from the channel into the liquid movement channel. When the urea solution pressure in the urea pipe decreases, the limiting block falls and blocks the urea pipe, achieving faster urea solution cutoff and preventing excessive urea solution spraying.

[0004] While the above solution can achieve timely sealing of the urea pipe, unused urea solution will remain in the pipe section behind the sealing position. When this part of the urea remains stagnant for a long time, it is not only prone to crystallization, which will cause blockage of the urea pipe and related components, but also cause corrosion to the inner wall of the urea pipe. Therefore, improvements are needed. Utility Model Content

[0005] The purpose of this invention is to solve the problem that existing technologies cannot process stagnant urea, and to propose a urea tube with a throttling effect.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a urea tube with a throttling effect, comprising a urea tank, an interface, and a connecting device. The interface is installed on the right side of the urea tank, and the connecting device is located on the right side of the urea tank. The connecting device includes a connecting block, which is located on the right side of the urea tank. A cavity is formed inside the connecting block, and an outlet is fixedly connected to the right side of the connecting block. A urea tube is provided at the end of the outlet away from the connecting block. A through hole is formed on the surface of the outlet, and a return pipe is fixedly connected to the inner wall of the through hole. The other end of the return pipe is fixedly connected to the inner wall of the urea tank. A stop block is slidably connected to the inner wall of the cavity, and a groove is formed on the inner wall of the outlet. An arc-shaped plate is slidably connected to the inner wall of the groove, and the arc-shaped plate is fixedly connected to the right side of the stop block.

[0007] Furthermore, a liquid inlet is fixedly connected to the left side of the connecting block, the liquid inlet abuts against the interface, and a sleeve is threadedly connected to the surface of the liquid inlet, the sleeve being threadedly connected to the surface of the interface.

[0008] Furthermore, a magnet is fixedly connected to the lower surface of the block, and an electromagnet is fixedly connected to the inner top wall of the cavity. When the magnet and the electromagnet are energized, they form a magnetic attraction.

[0009] Furthermore, a guide rod is fixedly connected to the inner bottom wall of the cavity. Two sets of guide rods are provided, and the two sets of guide rods are located on both sides of the electromagnet. The guide rods are slidably connected to the inner wall of the stop block.

[0010] Furthermore, a return spring is sleeved on the surface of the guide rod, one end of the return spring is fixedly connected to the inner bottom wall of the cavity, and the other end of the return spring is fixedly connected to the lower surface of the stop block.

[0011] Furthermore, the upper surface of the stop block is provided with an arc-shaped groove, the curvature of which matches the curvature of the arc plate and is consistent with the curvature of the inner wall of the urea pipe.

[0012] Furthermore, mounting blocks are fixedly connected to both the front and back of the connecting block, and the mounting blocks are provided with assembly holes for installation and positioning.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows: In this invention, by setting a connecting device, urea can be prevented from remaining in the urea pipe for a long time. In specific use, for a urea tank that integrates a urea pump, the inlet of the connecting block is first sealed to the interface of the urea tank using a sleeve; then the urea pump and electromagnet are started. After the electromagnet is energized, it generates magnetic force, attracting and driving the stop block equipped with a magnet to slide down. The stop block simultaneously compresses the return spring and drives the arc plate to move into the groove to block the through hole; at this time, the urea pump delivers urea from the urea tank. The urea flows into the cavity of the connecting block through the urea tank interface and the inlet of the connecting block in sequence, and then enters the urea pipe through the arc groove above the stop block and the arc plate, finally completing the spraying operation. When the vehicle stops running, the urea pump and electromagnet shut down synchronously. The return spring releases its elastic potential energy, pushing the stop block upwards. The stop block moves to the position blocking the outlet, and at the same time, the arc plate rises and moves away from the through hole. The urea remaining in the urea pipe flows back into the urea tank along the return pipe, realizing the recycling and circulation of urea. By setting up a connecting device, it is prevented that urea will remain in the urea pipe for a long time, avoiding the problem of urea crystallization and deposition due to prolonged standing in the pipe, thereby reducing the risk of urea pipe blockage. This not only reduces urea waste but also extends the service life of the urea pipe and related injection components, effectively improving the practicality of the equipment. Attached Figure Description

[0014] Figure 1 A three-dimensional structural diagram of a urea tube with a throttling effect is provided for this utility model; Figure 2 A schematic diagram of the structure of a urea tube connection device with a throttling effect is provided for this utility model; Figure 3 A schematic diagram of the through hole in a urea tube with a throttling effect is provided for this utility model; Figure 4 This utility model provides a schematic diagram of the internal structure of a connecting block in a urea tube with a throttling effect; Figure 5 This invention presents a schematic diagram of a groove in a urea tube that has a throttling effect.

[0015] Legend: 1. Urea tank; 2. Interface; 3. Connecting device; 31. Connecting block; 32. Cavity; 33. Inlet; 34. Outlet; 35. Stop block; 36. Magnet; 37. Electromagnet; 38. Return pipe; 39. Through hole; 310. Groove; 311. Arc plate; 312. Return spring; 313. Guide rod; 314. Sleeve; 315. Mounting block; 316. Urea pipe. Detailed Implementation

[0016] Please see Figures 1-5This utility model provides a technical solution: a urea tube with a throttling effect, including a urea tank 1, an interface 2, and a connecting device 3. The interface 2 is installed on the right side of the urea tank 1, and the connecting device 3 is located on the right side of the urea tank 1.

[0017] The specific setup and function of the connecting device 3 will be explained in detail below.

[0018] In this embodiment: the connecting device 3 includes a connecting block 31, which is located on the right side of the urea tank 1. A cavity 32 is formed inside the connecting block 31. An outlet 34 is fixedly connected to the right side of the connecting block 31. A urea pipe 316 is provided at the end of the outlet 34 away from the connecting block 31. A through hole 39 is formed on the surface of the outlet 34. A return pipe 38 is fixedly connected to the inner wall of the through hole 39. The other end of the return pipe 38 is fixedly connected to the inner wall of the urea tank 1. A stop block 35 is slidably connected to the inner wall of the cavity 32. A groove 310 is formed on the inner wall of the outlet 34. An arc plate 311 is slidably connected to the inner wall of the groove 310. The arc plate 311 is fixedly connected to the right side of the stop block.

[0019] The effects achieved by the above components are as follows: the arc-shaped plate 311 can block the through hole 39 when urea is sprayed, preventing urea from flowing into the urea tank 1 from the return pipe 38, which would reduce the amount of urea sprayed by the urea pipe 316 and cause the exhaust gas to be incompletely treated; the groove 310 is provided to prevent the arc-shaped plate 311 from being higher than the inner wall of the urea pipe 316, which would reduce the flow rate.

[0020] Specifically, a liquid inlet 33 is fixedly connected to the left side of the connecting block 31. The liquid inlet 33 abuts against the interface 2. A sleeve 314 is threadedly connected to the surface of the liquid inlet 33. The sleeve 314 is threadedly connected to the surface of the interface 2.

[0021] The effect achieved by the above components is: the sleeve 314 facilitates the connection between the liquid inlet 33 and the interface 2.

[0022] Specifically, a magnet 36 is fixedly connected to the lower surface of the stop block 35, and an electromagnet 37 is fixedly connected to the inner top wall of the cavity 32. When the magnet 36 and the electromagnet 37 are energized, they form a magnetic attraction.

[0023] The effect achieved by the above components is that the magnet 36 and electromagnet 37 can be used to control the position of the arc plate 311 in conjunction with the opening and closing of the urea pump.

[0024] Specifically, a guide rod 313 is fixedly connected to the inner bottom wall of the cavity 32. Two sets of guide rods 313 are provided, and the two sets of guide rods 313 are located on both sides of the electromagnet 37. The guide rods 313 are slidably connected to the inner wall of the stop block 35.

[0025] The effect achieved by the above components is to provide a guide rod 313 to protect the return spring 312 and extend its service life.

[0026] Specifically, a return spring 312 is sleeved on the surface of the guide rod 313. One end of the return spring 312 is fixedly connected to the inner bottom wall of the cavity 32, and the other end of the return spring 312 is fixedly connected to the lower surface of the stop block 35.

[0027] The effect achieved by the above components is as follows: the reset spring 312 can push the stop block 35 to rise and block the liquid inlet 33 and the liquid outlet 34.

[0028] Specifically, the upper surface of the stop block 35 is provided with an arc-shaped groove, the curvature of which matches the curvature of the arc plate 311 and is consistent with the curvature of the inner wall of the urea pipe 316.

[0029] The effect achieved by the above-mentioned components is that an arc-shaped groove is provided on the upper surface of the baffle 35, which can fix the flow direction of the urea solution.

[0030] Specifically, mounting blocks 315 are fixedly connected to both the front and back of the connecting block 31, and mounting blocks 315 are provided with mounting holes for installation and positioning.

[0031] The effect achieved by the above components is to facilitate the installation of the connecting block 31 by setting up the mounting block 315.

[0032] Working principle: By setting the connecting device 3, urea can be prevented from remaining in the urea pipe 316 for a long time. In specific use, for the urea tank 1 integrated with the urea pump, the inlet 33 of the connecting block 31 is first sealed to the interface 2 of the urea tank 1 through the sleeve 314; then the urea pump and electromagnet 37 are started. After the electromagnet 37 is energized, it generates magnetic force, which attracts the stop block 35 equipped with magnet 36 and drives it to slide down. The stop block 35 compresses the return spring 312 in sync, and drives the arc plate 311 to move into the groove 310 to block the through hole 39; at this time, the urea pump delivers urea from the urea tank 1. The urea flows into the cavity 32 of the connecting block 31 through the interface 2 of the urea tank 1 and the inlet 33 of the connecting block 31 in sequence. Then, it enters the urea pipe 316 through the arc groove above the stop block 35 and the arc plate 311, and finally completes the spraying operation. When the car stops running, the urea pump and electromagnet 37 shut down synchronously. The return spring 312 releases elastic potential energy to push the stop block 35 up. The stop block 35 moves to the position of blocking the outlet 34. At the same time, the arc plate 311 rises and moves away from the through hole 39. The urea remaining in the urea pipe 316 flows back into the urea tank 1 along the return pipe 38, realizing the recycling and circulation of urea.

Claims

1. A urea tube with a throttling effect, comprising a urea tank (1), an interface (2), and a connecting device (3), characterized in that: The interface (2) is installed on the right side of the urea tank (1), and the connecting device (3) is located on the right side of the urea tank (1); The connecting device (3) includes a connecting block (31), which is located on the right side of the urea tank (1). A cavity (32) is provided inside the connecting block (31). An outlet (34) is fixedly connected to the right side of the connecting block (31). A urea pipe (316) is provided at one end of the outlet (34) away from the connecting block (31). A through hole (39) is provided on the surface of the outlet (34). A return pipe (38) is fixedly connected to the inner wall of the through hole (39). The other end of the return pipe (38) is fixedly connected to the inner wall of the urea tank (1). A stop block (35) is slidably connected to the inner wall of the cavity (32). A groove (310) is provided on the inner wall of the outlet (34). An arc plate (311) is slidably connected to the inner wall of the groove (310). The arc plate (311) is fixedly connected to the right side of the stop block.

2. The urea tube with throttling effect according to claim 1, characterized in that: The left side of the connecting block (31) is fixedly connected to an inlet (33), which abuts against the interface (2). A sleeve (314) is threadedly connected to the surface of the inlet (33), and the sleeve (314) is threadedly connected to the surface of the interface (2).

3. A urea tube with a throttling effect according to claim 1, characterized in that: A magnet (36) is fixedly connected to the lower surface of the stop (35), and an electromagnet (37) is fixedly connected to the inner top wall of the cavity (32). The magnet (36) and the electromagnet (37) form a magnetic attraction after being energized.

4. A urea tube with a throttling effect according to claim 3, characterized in that: The inner bottom wall of the cavity (32) is fixedly connected with a guide rod (313). There are two sets of guide rods (313), which are arranged on both sides of the electromagnet (37). The guide rods (313) are slidably connected to the inner wall of the stop block (35).

5. A urea tube with a throttling effect according to claim 4, characterized in that: A reset spring (312) is sleeved on the surface of the guide rod (313). One end of the reset spring (312) is fixedly connected to the inner bottom wall of the cavity (32), and the other end of the reset spring (312) is fixedly connected to the lower surface of the stop block (35).

6. A urea tube with a throttling effect according to claim 1, characterized in that: The upper surface of the stop block (35) is provided with an arc-shaped groove, the curvature of which is adapted to the curvature of the arc plate (311) and consistent with the curvature of the inner wall of the urea pipe (316).

7. A urea tube with a throttling effect according to claim 1, characterized in that: The front and back sides of the connecting block (31) are fixedly connected to the mounting block (315), and the mounting block (315) is provided with assembly holes for installation and positioning.

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