A commercial vehicle urea nozzle cooling pipe assembly

Abstract

The present invention belongs to the technical field of urea nozzle cooling, and discloses a commercial vehicle urea nozzle cooling pipe assembly, comprising a cooling pipe and a cooling shell, wherein the cooling pipe is composed of a water inlet pipe and a water outlet pipe distributed front and rear, the cooling shell is sleeved on the outer surface of the urea nozzle, and an auxiliary cooling mechanism is provided between the cooling pipe and the cooling shell. The present invention, through the coordinated design of the cooling pipe, the cooling shell, and the auxiliary cooling mechanism, realizes that when the vehicle engine is shut down, low-temperature standby coolant enters the inner cavity of the cooling shell through the water inlet hole to cool the urea nozzle, thereby achieving good cooling effect and high efficiency, and avoiding the problem of poor cooling effect and low efficiency when the piston pushes the high-temperature coolant remaining in the cooling branch to the urea nozzle to cool the urea nozzle when the entire vehicle suddenly shuts down during use of the traditional cooling device.

Description

Technical Field

[0001] The present invention relates to the technical field of urea nozzle cooling, and in particular to a urea nozzle cooling pipe assembly for a commercial vehicle. Background Art

[0002] With the rapid development of the automotive industry and the improvement of people's living standards, cars have become an indispensable means of transportation for people's travel and freight transportation. Commercial diesel vehicle emission regulations have been upgraded from National V to National VI, with the NOx emission limit reduced by 82.1%, indicating a trend of stricter NOx emissions. Currently, the emission route for light-duty diesel vehicles meeting the National VI emission regulations typically requires the use of urea nozzles to inject urea before the SCR (Selective Catalvtic Reduction) or SDPF (Diesel Particle Filter with SCR Function) to reduce nitrogen oxide emissions.

[0003] After searching, a Chinese patent discloses a new type of urea nozzle cooling device (publication number: CN220815814U). Its main structure includes a cooling branch connected to a cooling pipe. The cooling pipe surrounds the urea nozzle and is connected to the engine coolant pipe. When the coolant flows through the urea nozzle through the cooling pipe, it can cool it. A piston is provided in the cooling branch. The piston can slide in the cooling branch to control the amount of coolant entering the cooling branch. A one-way valve is provided on the cooling pipe close to the cooling branch. The one-way valve is arranged on the side of the cooling branch away from the urea nozzle. The one-way valve allows coolant to flow from the cooling branch to the urea nozzle.

[0004] In actual use, the above patent sets a cooling branch on the liquid inlet side of the cooling pipe at the urea nozzle. When the vehicle is working normally, the piston can slide into the cooling branch to retain part of the coolant in the cooling branch. When the vehicle suddenly stops, the piston can push the coolant retained in the cooling branch to the urea nozzle, and then continue to cool the urea nozzle, which can avoid the temperature at the urea nozzle being too high when the vehicle suddenly stops. However, there are still corresponding disadvantages in actual use: in the above patent, the temperature of the coolant gradually increases during the circulation of the coolant for cooling. When the coolant in the liquid inlet side of the cooling pipe flows, heat exchange occurs with the coolant retained in the cooling branch, causing the temperature of the coolant retained in the cooling branch to increase, and the amount of coolant retained in the cooling branch is small. When the vehicle suddenly stops, the piston pushes the high-temperature coolant retained in the cooling branch to the urea nozzle to cool the urea nozzle, but the cooling effect is poor and the efficiency is low, so it needs to be improved. Summary of the Invention

[0005] The purpose of the present disclosure is to provide a commercial vehicle urea nozzle cooling pipe assembly, which has the advantages of convenient operation, good cooling effect and high efficiency. Through the coordinated design of structures such as the cooling pipe, cooling shell, and auxiliary cooling mechanism, the cooling effect and efficiency of the urea nozzle are improved.

[0006] According to one aspect of the present disclosure, a commercial vehicle urea nozzle cooling pipe assembly is provided, comprising a cooling pipe and a cooling shell. The cooling pipe is composed of a water inlet pipe and a water outlet pipe distributed front and rear. The cooling shell is sleeved on the outer surface of the urea nozzle. An auxiliary cooling mechanism is provided between the cooling pipe and the cooling shell.

[0007] The auxiliary cooling mechanism includes a mounting shell fixedly mounted on the left side of the outer surface of the cooling shell, the upper part of the mounting shell is provided with a water inlet cavity, the lower right part of the inner cavity of the water inlet cavity is provided with a water inlet hole connected with the upper part of the inner cavity of the cooling shell, the lower part of the mounting shell is provided with a water outlet cavity, the upper right part of the inner cavity of the water outlet cavity is provided with a water outlet hole connected with the lower part of the inner cavity of the cooling shell, the upper part of the mounting shell is located above the water inlet cavity, and a liquid inlet channel and a liquid outlet channel are respectively provided on the front and rear sides, the inner cavity of the water inlet cavity and the inner cavity of the water outlet cavity are vertically fixedly installed with the same sleeve, and the inner cavity of the sleeve A screw rod is provided in the cavity for transporting the coolant in the water outlet cavity to the water inlet cavity, and baffles for covering and sealing the inner cavities of the water inlet hole and the water outlet hole are respectively installed in the inner cavities of the water inlet cavity and the water outlet cavity for sliding up and down. A first driving mechanism for driving the screw rod to rotate is provided in the inner cavity of the liquid inlet channel and the inner cavity of the liquid outlet channel, and a second driving mechanism for driving the baffle to move is provided in the inner cavity of the mounting shell and the inner cavity of the liquid inlet channel and the inner cavity of the liquid outlet channel. A detection mechanism for detecting the flow of coolant is provided on the top of the screw rod;

[0008] The inner cavity of the water inlet pipe is communicated with the inner cavity of the liquid inlet channel, the inner cavity of the water outlet pipe is communicated with the inner cavity of the liquid outlet channel, and the inner cavities of the liquid inlet channel and the liquid outlet channel are respectively communicated with the upper part of the inner cavity of the cooling shell through connecting pipes.

[0009] In the above technical solution, preferably, the detection mechanism includes an assembly cavity opened at the upper part of the mounting shell between the liquid inlet channel and the liquid outlet channel and a pushing member arranged at the top of the spiral rod; an assembly shell is fixedly installed on the top surface of the inner cavity of the assembly cavity, a first annular copper sheet is fixedly installed on the upper part of the inner cavity of the assembly shell, a second annular copper sheet is slidably installed on the lower part of the inner cavity of the assembly shell, the bottom surface of the first copper sheet is movably connected to the upper surface of the second copper sheet, a signal wireless transmitter for transmitting prompt information to the vehicle's central control display screen is fixedly installed in the middle of the inner cavity top surface of the assembly shell, when the spiral rod rotates, the pushing member is moved under the action of centrifugal force to drive the second copper sheet to fit together with the first copper sheet, and when the first copper sheet and the second copper sheet are fit together, a complete loop is formed with the signal wireless transmitter and the vehicle power supply system.

[0010] In the above technical solution, preferably, the pushing member includes an annular block fixedly mounted on the top of the spiral rod, and a group of pushing rods are hingedly connected to the outer ring of the annular block at equal intervals in the circumference, and the pushing rods are movably connected to the bottom surface of the second copper sheet.

[0011] In the above technical solution, preferably, two spring compression rods are vertically fixedly installed on the left and right sides of the inner cavity of the assembly shell, and the bottom output ends of the spring compression rods are fixedly connected to the upper surface of the second copper sheet.

[0012] In the above technical solution, preferably, the first driving mechanism includes a mounting groove provided on the top surface of the inner cavity of the liquid inlet channel and the liquid outlet channel and a first transmission assembly arranged on the upper part of the spiral rod; an impeller is rotatably installed in the inner cavity of the mounting groove, and the lower parts of the two impellers extend to the upper parts of the inner cavity of the liquid inlet channel and the liquid outlet channel respectively, and a driving rod is fixedly installed at the axis of the impeller, and one end of the driving rod passes through the inner cavity of the assembly cavity. When the impeller rotates, the spiral rod is driven to rotate through the first transmission assembly.

[0013] In the above technical solution, preferably, the first transmission assembly includes a slave bevel gear fixedly mounted on the upper part of the spiral rod, the tooth surface of the slave bevel gear is symmetrically meshed with two main bevel gears, and the axis of the main bevel gear is fixedly connected to one end of the driving rod.

[0014] In the above technical solution, preferably, the second driving mechanism includes a slider sliding up and down on the bottom surfaces of the inner cavities of the liquid inlet channel and the liquid outlet channel respectively, and a second transmission assembly arranged in the inner cavity of the mounting shell; a groove is provided on the upper surface of the slider, the shape of the groove is adapted to the shape of the impeller, and a mounting frame extending into the inner cavity of the mounting shell is vertically fixed on the bottom surface of the slider, and when the slider moves, the second transmission assembly is driven by the mounting frame to drive the baffle to move.

[0015] In the above technical solution, preferably, the second transmission assembly includes a spring seat fixedly installed laterally on the right side of the inner cavity of the mounting shell, and the left end output shaft of the spring seat is fixedly installed with a cross bar, and two rotating rods are symmetrically hinged on the right side of the outer surface of the cross bar, and one end of the rotating rod is hinged to one side of the baffle; the connecting frame is hinged to the mounting frame.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention adopts the coordinated design of the cooling pipeline, the cooling shell, the auxiliary cooling mechanism and other structures. The coolant in the cooling pipeline circulates in the pipeline under the drive of the vehicle engine. When the coolant in the pipeline flows, the second driving mechanism can drive the two baffles to respectively close and seal the inner cavity of the water inlet and the water outlet. At the same time, when the coolant flows, the first driving mechanism drives the spiral rod to rotate. When the spiral rod rotates, the spare coolant in the water outlet cavity is transported to the inner cavity of the water inlet cavity. When the vehicle engine stops, the second driving mechanism drives the two baffles to close and seal the inner cavity of the water inlet and the water outlet. The plates are separated from the water inlet and outlet holes respectively. At this time, the temperature of the coolant remaining in the pipeline in the cooling shell is high, which reduces the cooling effect on the urea nozzle. The residual coolant enters the water outlet cavity through the water outlet hole. At the same time, the low-temperature standby coolant in the water inlet cavity enters the inner cavity of the cooling shell through the water inlet hole to cool the urea nozzle. The cooling effect is good and the efficiency is high, which avoids the coolant circulating in the pipeline from transferring high temperature to the standby coolant when flowing, affecting the cooling effect of the standby coolant on the urea nozzle. In addition, the standby coolant reserve is large, and the cooling effect is good.

[0018] 2. The present invention is designed with the coordination of structures such as the spiral rod and the detection mechanism. When the vehicle engine is operating normally, it can drive the coolant in the liquid inlet channel and the liquid outlet channel to circulate at a certain flow rate, and can drive the spiral rod to rotate through the first driving mechanism. When the spiral rod rotates, it drives the pushing member to move circumferentially. At the same time, the centrifugal force generated can enable the pushing member to push the second copper sheet to contact and fit with the first copper sheet. When the first copper sheet and the second copper sheet are fitted, they form a complete loop with the signal wireless transmitter and the vehicle power supply system. The signal wireless transmitter can transmit a signal that the equipment is operating normally to the vehicle's central control screen to prompt the vehicle operator. When leakage occurs in the pipeline, the coolant flow rate decreases, which reduces the rotation speed of the spiral rod, thereby weakening the centrifugal force generated and making it impossible for the pushing member to push the second copper sheet to contact and fit with the first copper sheet. At this time, the signal wireless transmitter cannot transmit the signal to prompt the vehicle operator, and the operator is required to inspect the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 It is a partial front cross-sectional structural schematic diagram of the auxiliary cooling mechanism of the present invention;

[0021] Figure 3 It is a partial front cross-sectional structural diagram of the liquid outlet channel, the first drive assembly, and the second drive assembly of the present invention;

[0022] Figure 4 This is a schematic cross-sectional structural diagram of another state of the liquid outlet channel, the first drive assembly, and the second drive assembly of the present invention;

[0023] Figure 5 It is a partial side cross-sectional structural schematic diagram of the auxiliary cooling mechanism of the present invention;

[0024] Figure 6 Schematic diagram of the structure of the second transmission mechanism of the present invention;

[0025] Figure 7 Schematic diagram of the structure of the first transmission mechanism of the present invention;

[0026] Figure 8 It is a partial front cross-sectional structural schematic diagram of the detection mechanism of the present invention;

[0027] Figure 9 It is a schematic cross-sectional structural diagram of another state of the detection mechanism of the present invention.

[0028] In the figure: 1. cooling pipeline; 11. water inlet pipe; 12. water outlet pipe; 2. cooling shell; 3. auxiliary cooling mechanism; 31. mounting shell; 32. water inlet chamber; 33. water inlet hole; 34. water outlet chamber; 35. water outlet hole; 36. liquid inlet channel; 37. liquid outlet channel; 38. sleeve; 39. screw rod; 310. baffle; 4. first driving mechanism; 41. first transmission assembly; 411. slave bevel gear; 412. main bevel gear; 42. impeller; 43. driving rod; 5. second driving mechanism; 51. slider; 52. second transmission assembly; 521. spring seat; 522. cross bar; 523. connecting frame; 524. rotating rod; 53. mounting frame; 6. detection mechanism; 61. assembly chamber; 62. pushing member; 63. assembly shell; 64. first copper sheet; 65. second copper sheet; 66. signal wireless transmitter; 7. spring compression rod. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0030] like Figures 1 to 9As shown, the present invention provides a commercial vehicle urea nozzle cooling pipe assembly, comprising a cooling pipe 1 and a cooling shell 2. The cooling pipe 1 is composed of a water inlet pipe 11 and a water outlet pipe 12 distributed front and back. The cooling shell 2 is sleeved on the outer surface of the urea nozzle. An auxiliary cooling mechanism 3 is provided between the cooling pipe 1 and the cooling shell 2.

[0031] The auxiliary cooling mechanism 3 includes a mounting shell 31 fixedly mounted on the left side of the outer surface of the cooling shell 2, a water inlet chamber 32 is provided on the upper part of the mounting shell 31, a water inlet hole 33 communicating with the upper part of the inner chamber of the cooling shell 2 is provided on the right lower part of the inner chamber of the water inlet chamber 32, a water outlet chamber 34 is provided on the lower part of the mounting shell 31, the inner chamber of the water outlet chamber 34 is filled with spare coolant, a water outlet hole 35 communicating with the lower part of the inner chamber of the cooling shell 2 is provided on the right upper part of the inner chamber of the water outlet chamber 34, the upper part of the mounting shell 31 is located above the water inlet chamber 32, and a liquid inlet channel 36 and a liquid outlet channel 37 are respectively provided on the front and rear sides, and the inner chambers of the water inlet chamber 32 and the water outlet chamber 34 are vertically fixed with the same The inner cavity of the sleeve 38 is provided with a screw rod 39 for conveying the coolant in the water outlet chamber 34 to the water inlet chamber 32. The inner cavities of the water inlet chamber 32 and the water outlet chamber 34 are respectively slidably installed with baffles 310 for shielding and sealing the inner cavities of the water inlet hole 33 and the water outlet hole 35. The inner cavities of the liquid inlet channel 36 and the liquid outlet channel 37 are provided with a first driving mechanism 4 for driving the screw rod 39 to rotate. The inner cavities of the mounting shell 31 and the inner cavities of the liquid inlet channel 36 and the liquid outlet channel 37 are provided with a second driving mechanism 5 for driving the movement of the baffle 310. The top of the screw rod 39 is provided with a detection mechanism 6 for detecting the flow of coolant;

[0032] The inner cavity of the water inlet pipe 11 is connected to the inner cavity of the liquid inlet channel 36, and the inner cavity of the water outlet pipe 12 is connected to the inner cavity of the liquid outlet channel 37. The inner cavities of the liquid inlet channel 36 and the liquid outlet channel 37 are respectively connected to the upper part of the inner cavity of the cooling shell 2 through connecting pipes.

[0033] When in use, the coolant in the cooling pipe 1 circulates in the pipe under the drive of the vehicle engine. When the coolant in the pipe flows, the second driving mechanism 5 can drive the two baffles 310 to respectively close and seal the inner cavities of the water inlet hole 33 and the water outlet hole 35. At the same time, when the coolant flows, the first driving mechanism 4 drives the screw rod 39 to rotate. When the screw rod 39 rotates, the spare coolant in the water outlet cavity 34 is transported to the inner cavity of the water inlet cavity 32. When the vehicle engine stops, the second driving mechanism 5 drives the two baffles 310 to respectively close and seal the inner cavities of the water inlet hole 33 and the water outlet hole 35. The cooling liquid in the cooling pipe is separated from the water outlet hole 35. At this time, the temperature of the coolant remaining in the cooling shell 2 is high, which reduces the cooling effect on the urea nozzle. The residual coolant enters the water outlet cavity 34 through the water outlet hole 35. At the same time, the low-temperature standby coolant in the water inlet cavity 32 enters the inner cavity of the cooling shell 2 through the water inlet hole 33 to cool the urea nozzle. The cooling effect is good and the efficiency is high. It avoids the coolant circulating in the pipe from transferring high temperature to the standby coolant when flowing, which affects the cooling effect of the standby coolant on the urea nozzle. The standby coolant has a large reserve and a good cooling effect.

[0034] It should be noted that when the screw rod 39 rotates, it can drive the detection mechanism 6 to operate. The detection mechanism 6 can detect the sealing of the cooling pipeline 1 according to the flow of coolant in the cooling pipeline, and prompt the vehicle operator to improve the practicality of the device.

[0035] like Figure 8 and Figure 9 As shown, the detection mechanism 6 includes an assembly chamber 61 opened at the upper part of the mounting shell 31 and located between the liquid inlet channel 36 and the liquid outlet channel 37, and a pushing member 62 arranged at the top of the spiral rod 39; an assembly shell 63 is fixedly installed on the top surface of the inner cavity of the assembly chamber 61, and an annular first copper sheet 64 is fixedly installed on the upper part of the inner cavity of the assembly shell 63, and an annular second copper sheet 65 is slidably installed on the lower part of the inner cavity of the assembly shell 63. The bottom surface of the first copper sheet 64 is movably connected to the upper surface of the second copper sheet 65, and a signal wireless transmitter 66 for transmitting prompt information to the vehicle's central control display screen is fixedly installed in the middle of the inner cavity top surface of the assembly shell 63. When the spiral rod 39 rotates, the pushing member 62 moves under the action of centrifugal force to drive the second copper sheet 65 to fit together with the first copper sheet 64. When the first copper sheet 64 and the second copper sheet 65 are in contact, they form a complete loop with the signal wireless transmitter 66 and the vehicle power supply system.

[0036] During use, when the vehicle engine is operating normally, it can drive the coolant in the liquid inlet channel 36 and the liquid outlet channel 37 to circulate at a certain flow rate, and can drive the screw rod 39 to rotate through the first driving mechanism 4. When the screw rod 39 rotates, it drives the pushing member 62 to move circumferentially. At the same time, the centrifugal force generated can enable the pushing member 62 to push the second copper sheet 65 to contact and fit with the first copper sheet 64. When the first copper sheet 64 and the second copper sheet 65 are in contact, they form a complete loop with the signal wireless transmitter 66 and the vehicle power supply system. The signal wireless transmitter 66 can transmit a signal that the equipment is operating normally to the vehicle central control screen to prompt the vehicle operator. When there is a leak in the pipeline, the coolant flow rate decreases, causing the rotation speed of the screw rod 39 to decrease, thereby weakening the centrifugal force generated and making it impossible for the pushing member 62 to push the second copper sheet 65 to contact and fit with the first copper sheet 64. At this time, the signal wireless transmitter 66 cannot transmit the signal to prompt the vehicle operator, and the operator needs to inspect the pipeline.

[0037] like Figure 8 and Figure 9 As shown, the pusher 62 includes an annular block fixedly sleeved on the top of the spiral rod 39 , and a group of push rods are hingedly connected to the outer ring of the annular block at equal intervals in the circumferential direction, and the push rods are movably connected to the bottom surface of the second copper sheet 65 .

[0038] During use, the spiral rod 39 rotates, driving the annular block to rotate. The annular block rotates, driving the push rod to move circumferentially. Under the action of centrifugal force, the push rod can flip upward to a horizontal state while moving circumferentially. At the same time, when the push rod flips upward, it can push the second copper sheet 65 to move and contact the first copper sheet 64.

[0039] like Figure 8 and Figure 9 As shown, two spring compression rods 7 are vertically fixedly installed on the left and right sides of the inner cavity of the assembly shell 63 , and the bottom output ends of the spring compression rods 7 are fixedly connected to the upper surface of the second copper sheet 65 .

[0040] During use, when the device stops operating, the second copper sheet 65 is driven by the elastic force of the spring compression rod 7 to move downward and separate from the first copper sheet 64 .

[0041] like Figure 5 and Figure 7 As shown, the first driving mechanism 4 includes a mounting groove opened on the top surface of the inner cavity of the liquid inlet channel 36 and the liquid outlet channel 37 and a first transmission component 41 arranged on the upper part of the screw rod 39; an impeller 42 is rotatably installed in the inner cavity of the mounting groove, and the lower parts of the two impellers 42 extend to the upper part of the inner cavity of the liquid inlet channel 36 and the liquid outlet channel 37 respectively. A driving rod 43 is fixedly installed at the axis of the impeller 42, and one end of the driving rod 43 passes through the inner cavity of the assembly cavity 61. When the impeller 42 rotates, the screw rod 39 is driven to rotate through the first transmission component 41.

[0042] During use, when the coolant in the liquid inlet channel 36 and the liquid outlet channel 37 circulates at a certain flow rate, it can drive the impeller 42 to rotate, and the impeller 42 drives the drive rod 43 to rotate. The drive rod 43 can drive the screw rod 39 to rotate through the first transmission assembly 41.

[0043] like Figure 5 and Figure 7 As shown, the first transmission assembly 41 includes a slave bevel gear 411 fixedly mounted on the upper portion of the spiral rod 39 , and the tooth surface of the slave bevel gear 411 is symmetrically meshed with two main bevel gears 412 , and the axis of the main bevel gear 412 is fixedly connected to one end of the driving rod 43 .

[0044] When in use, the driving rod 43 rotates to drive the main bevel gear 412 to rotate. When the two main bevel gears 412 rotate in opposite directions, they can drive the slave bevel gear 411 to rotate. The rotation of the slave bevel gear 411 can drive the screw rod 39 to rotate.

[0045] like Figure 5 and Figure 6 As shown, the second driving mechanism 5 includes a slider 51 that slides up and down on the bottom surfaces of the inner cavities of the liquid inlet channel 36 and the liquid outlet channel 37 respectively, and a second transmission assembly 52 arranged in the inner cavity of the mounting shell 31; a groove is provided on the upper surface of the slider 51, the shape of the groove is adapted to the shape of the impeller 42, and a mounting frame 53 extending into the inner cavity of the mounting shell 31 is vertically fixed on the bottom surface of the slider 51. When the slider 51 moves, the second transmission assembly 52 is driven to move by the mounting frame 53, driving the baffle 310 to move.

[0046] During use, when the coolant circulates in the liquid inlet channel 36 and the liquid outlet channel 37, the coolant can squeeze the slider 51, causing the slider 51 to move downward, and through the second transmission component 52, it can drive the two baffles 310 to respectively cover and seal the inner cavities of the water inlet hole 33 and the water outlet hole 35, thereby preventing the coolant circulating in the pipeline from transferring high temperature to the standby coolant.

[0047] like Figure 6 As shown, the second transmission assembly 52 includes a spring seat 521 fixedly installed horizontally on the right side of the inner cavity of the mounting shell 31, and a cross bar 522 is fixedly installed on the output shaft at the left end of the spring seat 521. Two rotating rods 524 are symmetrically hinged on the right side of the outer surface of the cross bar 522, and one end of the rotating rod 524 is hinged to one side of the baffle 310; the connecting frame 523 is hinged to the mounting frame 53.

[0048] When in use, the slider 51 moves downward to drive the mounting frame 53 to move, and the movement of the mounting frame 53 drives the cross bar 522 to move through the connecting frame 523. When the cross bar 522 moves, it can drive the rotating rod 524 to drive the baffle 310 to move.

[0049] The working principle and use process of the present invention:

[0050] When in use, first, the coolant in the cooling pipe 1 circulates in the pipe under the drive of the vehicle engine. When the coolant in the liquid inlet channel 36 and the liquid outlet channel 37 circulates, the coolant can squeeze the slider 51, causing the slider 51 to move downward. When the slider 51 moves downward, it drives the mounting frame 53 to move. The mounting frame 53 moves through the connecting frame 523 to drive the cross bar 522 to move. When the cross bar 522 moves, it can drive the rotating rod 524 to drive the baffle 310 to move, so that the two baffles 310 can respectively cover and seal the inner cavity of the water inlet hole 33 and the water outlet hole 35. At the same time, the coolant in the liquid inlet channel 36 and the liquid outlet channel 37 is When the liquid circulates at a certain flow rate, it can drive the impeller 42 to rotate, and the impeller 42 drives the driving rod 43 to rotate. When the driving rod 43 rotates, it drives the main bevel gear 412 to rotate. When the two main bevel gears 412 rotate in opposite directions, they can drive the slave bevel gear 411 to rotate. The rotation of the slave bevel gear 411 can drive the screw rod 39 to rotate. When the screw rod 39 rotates, the spare coolant in the water outlet chamber 34 is transported to the inner cavity of the water inlet chamber 32. When the vehicle engine stops, under the elastic force of the spring seat 521, the two baffles 310 are driven to move and separate from the water inlet hole 33 and the water outlet hole 35 respectively. At this time, the residual coolant in the cooling shell 2 The high temperature of the coolant in the pipeline reduces the cooling effect of the urea nozzle, and the residual coolant enters the water outlet cavity 34 through the water outlet hole 35. At the same time, the low-temperature standby coolant in the water inlet cavity 32 enters the inner cavity of the cooling shell 2 through the water inlet hole 33 to cool the urea nozzle; and when the vehicle engine is operating normally, it can drive the coolant in the liquid inlet channel 36 and the liquid outlet channel 37 to circulate at a certain flow rate, and can drive the screw rod 39 to rotate through the first driving mechanism 4. When the screw rod 39 rotates, it drives the pusher 62 to move circumferentially, and the centrifugal force generated can enable the pusher 62 to push the second copper plate 65 and the first copper plate 66 to move in a circular direction. A copper sheet 64 is in contact and fit together. When the first copper sheet 64 and the second copper sheet 65 are in contact, they form a complete loop with the signal wireless transmitter 66 and the vehicle power supply system. The signal wireless transmitter 66 can transmit a signal indicating that the equipment is operating normally to the vehicle's central control screen to prompt the vehicle operator. When a leak occurs in the pipeline, the coolant flow rate decreases, causing the rotation speed of the spiral rod 39 to decrease, thereby weakening the centrifugal force generated, making it impossible for the pusher 62 to push the second copper sheet 65 to contact and fit the first copper sheet 64. At this time, the signal wireless transmitter 66 cannot transmit the signal to prompt the vehicle operator, and the operator is required to inspect the pipeline.

[0051] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0052] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A commercial vehicle urea nozzle cooling pipe assembly, characterized in that: The invention comprises a cooling pipeline (1) and a cooling shell (2), wherein the cooling pipeline (1) is composed of a water inlet pipe (11) and a water outlet pipe (12) distributed front and back, the cooling shell (2) is sleeved on the outer surface of the urea nozzle, and an auxiliary cooling mechanism (3) is provided between the cooling pipeline (1) and the cooling shell (2); The auxiliary cooling mechanism (3) includes a mounting shell (31) fixedly mounted on the left side of the outer surface of the cooling shell (2), a water inlet cavity (32) is provided on the upper part of the mounting shell (31), a water inlet hole (33) communicating with the upper part of the inner cavity of the cooling shell (2) is provided on the right lower part of the inner cavity of the water inlet cavity (32), a water outlet cavity (34) is provided on the lower part of the inner cavity of the water outlet cavity (34), a water outlet hole (35) communicating with the lower part of the inner cavity of the cooling shell (2) is provided on the right upper part of the inner cavity of the water outlet cavity (34), the upper part of the mounting shell (31) is located above the water inlet cavity (32), and a liquid inlet channel (36) and a liquid outlet channel (37) are respectively provided on the front and rear sides thereof, the inner cavity of the water inlet cavity (32) and the inner cavity of the water outlet cavity (34) are vertically fixedly mounted with the same sleeve (38), and the sleeve (38) ) is provided in the inner cavity of the housing (31) for conveying the cooling liquid in the water outlet cavity (34) to the water inlet cavity (32); baffles (310) for covering and sealing the inner cavities of the water inlet hole (33) and the water outlet hole (35) are respectively installed in the inner cavities of the water inlet cavity (32) and the water outlet cavity (34) so ​​as to slide up and down; a first driving mechanism (4) for driving the rotation of the spiral rod (39) is provided in the inner cavity of the liquid inlet channel (36) and the inner cavity of the liquid outlet channel (37); a second driving mechanism (5) for driving the movement of the baffle (310) is provided in the inner cavity of the mounting shell (31) and the inner cavity of the liquid inlet channel (36) and the inner cavity of the liquid outlet channel (37); a detection mechanism (6) for detecting the flow of the cooling liquid is provided at the top of the spiral rod (39); The inner cavity of the water inlet pipe (11) is in communication with the inner cavity of the liquid inlet channel (36), the inner cavity of the water outlet pipe (12) is in communication with the inner cavity of the liquid outlet channel (37), and the inner cavities of the liquid inlet channel (36) and the liquid outlet channel (37) are respectively in communication with the upper portion of the inner cavity of the cooling shell (2) via connecting pipes; The detection mechanism (6) comprises an assembly cavity (61) provided on the upper portion of the mounting shell (31) and located between the liquid inlet channel (36) and the liquid outlet channel (37), and a pusher (62) provided on the top of the spiral rod (39); an assembly shell (63) is fixedly mounted on the top surface of the inner cavity of the assembly cavity (61); an annular first copper sheet (64) is fixedly mounted on the upper portion of the inner cavity of the assembly shell (63); an annular second copper sheet (65) is slidably mounted on the lower portion of the inner cavity of the assembly shell (63); the first copper sheet (64) is fixedly mounted on the upper portion of the inner cavity of the assembly shell (63); The bottom surface is movably connected to the upper surface of the second copper sheet (65); a signal wireless transmitter (66) for transmitting prompt information to the vehicle's central control display screen is fixedly installed in the middle of the inner cavity top surface of the assembly shell (63); when the spiral rod (39) rotates, the pusher (62) moves under the action of centrifugal force to drive the second copper sheet (65) to fit with the first copper sheet (64); when the first copper sheet (64) and the second copper sheet (65) are fitted, they form a complete loop with the signal wireless transmitter (66) and the vehicle power supply system.

2. The commercial vehicle urea nozzle cooling pipe assembly according to claim 1, characterized in that: The pushing member (62) comprises an annular block fixedly sleeved on the top of the spiral rod (39), and a group of pushing rods are hingedly connected to the outer ring of the annular block at equal intervals in the circumferential direction, and the pushing rods are movably connected to the bottom surface of the second copper sheet (65).

3. The commercial vehicle urea nozzle cooling pipe assembly according to claim 1, characterized in that: Two spring compression rods (7) are vertically fixedly installed on the left and right sides of the inner cavity of the assembly shell (63), and the bottom output ends of the spring compression rods (7) are fixedly connected to the upper surface of the second copper sheet (65).

4. The commercial vehicle urea nozzle cooling pipe assembly according to claim 1, characterized in that: The first driving mechanism (4) includes a mounting groove provided on the top surface of the inner cavity of the liquid inlet channel (36) and the liquid outlet channel (37) and a first transmission assembly (41) provided on the upper part of the screw rod (39); an impeller (42) is rotatably mounted in the inner cavity of the mounting groove, and the lower parts of the two impellers (42) extend to the upper part of the inner cavity of the liquid inlet channel (36) and the liquid outlet channel (37) respectively. A driving rod (43) is fixedly mounted at the axis of the impeller (42), and one end of the driving rod (43) penetrates into the inner cavity of the assembly cavity (61). When the impeller (42) rotates, the screw rod (39) is driven to rotate through the first transmission assembly (41).

5. The commercial vehicle urea nozzle cooling pipe assembly according to claim 4, characterized in that: The first transmission assembly (41) comprises a slave bevel gear (411) fixedly sleeved on the upper portion of the screw rod (39), the tooth surface of the slave bevel gear (411) being symmetrically meshed with two master bevel gears (412), and the axis of the master bevel gear (412) being fixedly connected to one end of the driving rod (43).

6. The commercial vehicle urea nozzle cooling pipe assembly according to claim 4, characterized in that: The second driving mechanism (5) comprises a slider (51) which slides up and down on the bottom surfaces of the inner cavities of the liquid inlet channel (36) and the liquid outlet channel (37), respectively, and a second transmission assembly (52) arranged in the inner cavity of the mounting shell (31); a groove is provided on the upper surface of the slider (51), the shape of the groove being adapted to the shape of the impeller (42); a mounting frame (53) extending into the inner cavity of the mounting shell (31) is vertically fixedly mounted on the bottom surface of the slider (51); when the slider (51) moves, the second transmission assembly (52) is driven by the mounting frame (53) to move, thereby driving the baffle (310) to move.

7. The commercial vehicle urea nozzle cooling pipe assembly according to claim 6, characterized in that: The second transmission assembly (52) comprises a spring seat (521) fixedly mounted transversely on the right side of the inner cavity of the mounting shell (31); a crossbar (522) is fixedly mounted on the output shaft at the left end of the spring seat (521); two rotating rods (524) are symmetrically hinged on the right side of the outer surface of the crossbar (522); one end of the rotating rod (524) is hinged to one side of the baffle (310); a connecting frame (523) is hinged to the mounting frame (53), and the connecting frame (523) is connected to the crossbar (522).

Images