Bottom drainage structure of urea sensor

Abstract

The utility model provides a urea sensor bottom liquid discharge structure which comprises a urea box, a urea sensor, a connecting pipe, a liquid discharge assembly and a plugging assembly, and the bottom of the urea box is provided with a mounting opening communicated with a storage space in the urea box; the urea sensor is arranged on the urea box and penetrates into the storage space, the urea sensor is provided with a cooling pipe located in the storage space, and an opening communicated with an internal pipeline of the cooling pipe is formed in the bottom of the cooling pipe; one end of the connecting pipe is communicated with the opening; the liquid discharging assembly is connected to the outer side of the mounting opening, one end of the liquid discharging assembly is inserted into the mounting opening and connected with the other end of the connecting pipe, a liquid discharging channel is formed in the liquid discharging assembly, one end of the liquid discharging channel communicates with the connecting pipe, and a liquid discharging outlet is formed in the position, on the outer side of the liquid discharging assembly, of the other end of the liquid discharging channel; the plugging assembly is connected with the liquid discharging assembly and used for plugging or opening the liquid discharging outlet. The urea sensor bottom drainage structure can prevent water from freezing and expanding to damage the urea sensor.

Description

Technical Field

[0001] This utility model relates to the field of urea sensor technology, and in particular to a bottom drainage structure for a urea sensor. Background Technology

[0002] The coolant pipe of the urea sensor is a core component of its integrated heating system. Its main function is to prevent urea solution from crystallizing in low-temperature environments, ensuring the normal operation of the exhaust gas recirculation (SCR) system. While the original design of the urea sensor used engine coolant, some existing urea sensors use water or other liquids with higher melting (freezing) points as the heating and thawing medium. However, in areas below 0°C, water easily freezes and expands, potentially damaging the sensor and causing coolant leaks.

[0003] Therefore, for cases where water is used as the heating and thawing medium for urea sensors, it is necessary to provide a urea sensor bottom drainage structure that can prevent water from freezing and expanding, thus preventing damage to the urea sensor. Utility Model Content

[0004] The purpose of this invention is to provide a bottom drainage structure for a urea sensor that can prevent water from freezing and expanding, thus preventing damage to the urea sensor.

[0005] To achieve the above objectives, this utility model provides a bottom drainage structure for a urea sensor, including a urea tank, a urea sensor, a connecting pipe, a drainage assembly, and a sealing assembly. The bottom of the urea tank has an installation port communicating with its internal storage space. The urea sensor is mounted on the urea tank and extends into the storage space. The urea sensor has a cooling pipe located within the storage space, and the bottom of the cooling pipe has an opening communicating with its internal pipe. One end of the connecting pipe communicates with the opening. The drainage assembly is connected to the outside of the installation port, and one end of the drainage assembly is inserted into the installation port and connected to the other end of the connecting pipe. The drainage assembly has a drainage channel inside, one end of which communicates with the connecting pipe, and the other end of which forms a drainage outlet on the outside of the drainage assembly. The sealing assembly is connected to the drainage assembly and is used to seal or open the drainage outlet.

[0006] Preferably, the cooling pipe is provided with a connector at the opening, and the connecting pipe is in communication with the connector.

[0007] Preferably, the bottom of the urea tank has an outward protrusion, and the mounting port is located within the protrusion.

[0008] Preferably, the drainage assembly includes a drainage locking member and a drainage connector. The drainage connector abuts against the outer end of the protrusion, and one end of the drainage connector is inserted into the mounting port and connected to the connecting pipe. The drainage channel is disposed inside the drainage connector, and the drainage outlet is formed on the outer side of the drainage connector. The drainage locking member is sleeved on the drainage connector and connected to the protrusion to lock the drainage connector onto the protrusion. The sealing assembly is connected to the drainage connector.

[0009] Preferably, a sealing element is provided between the drain connector and the outer end of the protrusion.

[0010] Preferably, the drain connector includes a first connector and a second connector. One end of the first connector is inserted into the mounting port and connected to the connecting pipe. One end of the second connector is connected to the other end of the first connector and abuts against the outer end of the protrusion. The first connector has a first channel communicating with the connecting pipe, and the second connector has a second channel communicating with the first channel to form the drain channel. The drain outlet is formed on the outer side of the second connector. The drain locking member is sleeved on the second connector. The sealing assembly is connected to the other end of the second connector.

[0011] Preferably, the drain locking member is detachably connected to the protrusion.

[0012] Preferably, the sealing assembly includes a control valve, one end of which is connected to the drainage assembly, and the other end of which has a drainage outlet. The control valve is used to seal or open the drainage outlet.

[0013] Preferably, a switch handle is rotatably connected to the control valve, and by rotating the switch handle, the control valve is closed or opened, thereby blocking or opening the drain outlet.

[0014] Preferably, the sealing assembly further includes a plug, which is detachably inserted into the liquid outlet and used to seal the liquid outlet.

[0015] Compared with the prior art, the bottom drainage structure of the urea sensor of this utility model has an opening at the bottom of the cooling pipe of the urea sensor, an installation port at the bottom of the urea tank, and a drainage component at the installation port. At the same time, a connecting pipe connects the opening at the bottom of the cooling pipe to the drainage channel of the drainage component. A sealing component seals the drainage outlet of the drainage channel. Therefore, before the arrival of low temperature or when needed, the drainage outlet can be opened by the sealing component, so that the water in the cooling pipe can be discharged from the drainage outlet through the opening, connecting pipe, and drainage channel. This achieves the purpose of draining the water, which is used as a heating and thawing medium, from the bottom of the urea tank, thereby preventing the water from freezing and expanding and damaging the urea sensor. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the bottom drainage structure of the urea sensor of this utility model.

[0017] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0018] Figure 3 This is a structural diagram of the bottom drainage structure of the urea sensor of this utility model after removing the urea tank.

[0019] Figure 4 This is a structural diagram of the urea sensor with a bottom drainage structure according to the present invention.

[0020] Figure 5 This is a structural diagram of the bottom drainage structure of the urea sensor of this utility model after the drainage locking part of the drainage component is removed from the protrusion of the urea tank. Detailed Implementation

[0021] To explain in detail the technical content, structural features, objectives and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0022] Please see Figures 1 to 5 The urea sensor bottom drainage structure 100 of this utility model includes a urea tank 1, a urea sensor 2, a connecting pipe 3, a drainage assembly 4, and a sealing assembly 5. The bottom of the urea tank 1 is provided with an installation port 12 communicating with its internal storage space 11. The urea sensor 2 is disposed on the urea tank 1 and penetrates into the storage space 11. The urea sensor 2 is provided with a cooling pipe 21 located in the storage space 11. The bottom of the cooling pipe 21 is provided with an opening communicating with its internal pipe. One end of the connecting pipe 3 is connected to the opening. The drainage assembly 4 is connected to the outside of the installation port 12, and one end of the drainage assembly 4 is inserted into the installation port 12 and connected to the other end of the connecting pipe 3. The drainage assembly 4 is provided with a drainage channel 41 inside. One end of the drainage channel 41 is connected to the connecting pipe 3, and the other end of the drainage channel 41 forms a drainage outlet 411 on the outside of the drainage assembly 4. The sealing assembly 5 is connected to the drainage assembly 4 and is used to seal or open the drainage outlet 411.

[0023] This invention provides an opening at the bottom of the cooling pipe 21 of the urea sensor 2, an installation port 12 at the bottom of the urea tank 1, and a drain assembly 4 at the installation port 12. A connecting pipe 3 connects the opening at the bottom of the cooling pipe 21 to the drain channel 41 of the drain assembly 4. A sealing assembly 5 seals the drain outlet 411 of the drain channel 41. Therefore, before low temperatures arrive or when needed, the drain outlet 411 can be opened by the sealing assembly 5, allowing water in the cooling pipe 21 to drain through the opening, connecting pipe 3, and drain channel 41 from the drain outlet 411. This achieves the purpose of draining water, which serves as a heating and thawing medium, from the bottom of the urea tank 1, thereby preventing water from freezing and expanding, which could damage the urea sensor 2.

[0024] Please see Figure 3 and Figure 4 In one embodiment, the cooling pipe 21 has a connector 211 at its opening, and the connecting pipe 3 communicates with the connector 211. The drain outlet 411 is opened by the sealing assembly 5, allowing water in the cooling pipe 21 to be discharged from the drain outlet 411 through the opening, connector 211, connecting pipe 3, and drain channel 41. This achieves the purpose of draining the water, which serves as the heating and defrosting medium, from the bottom of the urea tank 1, thereby preventing the water from freezing and expanding, which could damage the urea sensor 2. However, this is not a limitation. For example, one end of the connecting pipe 3 can also be directly welded to the opening of the cooling pipe 21 for a sealed connection.

[0025] Please see Figure 1 and Figure 2 In one embodiment, a protrusion 13 is formed on the bottom of the urea tank 1 facing outward, and an installation port 12 is opened in the protrusion 13. The protrusion 13 is provided on the bottom of the urea tank 1 to facilitate the installation of the drainage assembly 4.

[0026] Please see Figures 1 to 5 In one embodiment, the drainage assembly 4 includes a drainage locking member 42 and a drainage connector 43. The drainage connector 43 abuts against the outer end of the protrusion 13, and one end of the drainage connector 43 is inserted into the mounting port 12 and connected to the connecting pipe 3. The drainage channel 41 is disposed in the drainage connector 43, and the drainage outlet 411 is formed on the outer side of the drainage connector 43. The drainage locking member 42 is sleeved on the drainage connector 43 and connected to the protrusion 13 to lock the drainage connector 43 onto the protrusion 13. The sealing assembly 5 is connected to the drainage connector 43.

[0027] Furthermore, a sealing element 6 is provided between the drain connector 43 and the outer end of the protrusion 13. By sealing the position between the drain connector 43 and the outer end of the protrusion 13 with the sealing element 6, leakage of urea solution in the storage space 11 of the urea tank 1 can be prevented.

[0028] Further, in one embodiment, the drain connector 43 includes a first connector 431 and a second connector 432. One end of the first connector 431 is inserted into the mounting port 12 and connected to the connecting pipe 3. One end of the second connector 432 is connected to the other end of the first connector 431 and abuts against the outer end of the protrusion 13. The first connector 431 has a first channel 431a communicating with the connecting pipe 3, and the second connector 432 has a second channel 432a communicating with the first channel 431a to form a drain channel 41. A drain outlet 411 is formed on the outer side of the second connector 432. A drain locking member 42 is sleeved on the second connector 432. A sealing assembly 5 is connected to the other end of the second connector 432. Specifically, the outer side of the second connector 432 has a stepped structure 432b, and the drain locking member 42 is sleeved on the stepped structure 432b. More specifically, the first connector 431 and the second connector 432 are detachably connected. For example, the first connector 431 and the second connector 432 may be connected by a threaded structure, but this is not a limitation.

[0029] It is worth noting that in other alternative embodiments, the first connector 431 and the second connector 432 may also be an integral structure, that is, the drain connector 43 adopts the structure of a single connector.

[0030] Furthermore, a sealing element 6 is provided at the connection between the first connector 431 and the second connector 432. By sealing the connection between the first connector 431 and the second connector 432 with the sealing element 6, the urea solution in the storage space 11 of the urea tank 1 can be prevented from seeping into the connection between the first connector 431 and the second connector 432.

[0031] Please see Figure 2 and Figure 5 In one embodiment, the drain locking member 42 is detachably connected to the protrusion 13. For example, the drain locking member 42 and the protrusion 13 may be connected by a threaded connection, allowing the drain locking member 42 to be detached from the protrusion 13 or installed on the protrusion 13 by turning it. However, the detachable structure between the drain locking member 42 and the protrusion 13 is not limited to this. For example, the drain locking member 42 and the protrusion 13 may also be connected by a snap-fit ​​connection to achieve the purpose of detachability.

[0032] The installation port 12 can be opened by removing the drain locking member 42 from the protrusion 13, allowing the urea solution in the storage space 11 of the urea tank 1 to be discharged outward through the installation port 12. After the urea solution is drained, the end face of the protrusion 13 and the sealing member 6 of the urea tank 1 need to be cleaned to avoid affecting the sealing performance.

[0033] Please see Figures 1 to 3In one embodiment, the sealing assembly 5 includes a control valve 51. One end of the control valve 51 is connected to the drainage assembly 4, and the other end of the control valve 51 has a drainage outlet 511. The control valve 51 is used to seal or open the drainage outlet 411. Specifically, one end of the control valve 51 is connected to the second connector 432 of the drainage connector 43. By adjusting the control valve 51, the drainage outlet 411 on the second connector 432 is sealed or opened. More specifically, a switch handle 512 is rotatably connected to the control valve 51. By rotating the switch handle 512, the control valve 51 is closed or opened, thereby sealing or opening the drainage outlet 411. The control valve 51 can adopt an existing water valve structure, but is not limited thereto.

[0034] Furthermore, in one embodiment, a seal 6 is provided at the connection between the control valve 51 and the second connector 432. The seal 6 seals the connection between the control valve 51 and the second connector 432, preventing water discharged from the drain outlet 411 on the second connector 432 from leaking out at the connection between the control valve 51 and the second connector 432.

[0035] Furthermore, in one embodiment, the sealing assembly 5 further includes a plug 52, which is detachably inserted into the outlet 511 and used to seal the outlet 511. By removing the plug 52, the outlet 511 of the control valve 51 can be opened, and the drain outlet 411 can be opened through the control valve 51, so that water in the cooling pipe 21 can be discharged from the outlet 511 of the control valve 51 through the opening, connector 211, connecting pipe 3, drain channel 41, and drain outlet 411.

[0036] Combination Figures 1 to 5 The specific working principle of the bottom drainage structure 100 of the urea sensor of this utility model is as follows:

[0037] When it is necessary to drain the water from the cooling pipe 21, the plug 52 is removed to open the outlet 511 of the control valve 51. By rotating the switch handle 512 of the control valve 51, the control valve 51 is opened, thereby opening the drain outlet 411 of the drain assembly 4. This allows the water in the cooling pipe 21 to drain out from the outlet 511 of the control valve 51 through the opening, connector 211, connecting pipe 3, drain channel 41 of the drain assembly 4, and drain outlet 411. When it is not necessary to drain the water from the cooling pipe 21, the control valve 51 is closed by rotating the switch handle 512 of the control valve 51, thereby blocking the drain outlet 411 of the drain assembly 4, preventing the water in the cooling pipe 21 from draining out from the drain outlet 411 of the drain assembly 4.

[0038] In summary, the bottom drainage structure 100 of the urea sensor of this utility model adopts a bottom drainage design, which can drain the water used as a heating and defrosting medium from the bottom of the urea tank 1, effectively preventing the water from freezing and expanding and damaging the urea sensor 2.

[0039] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the scope of the present utility model application shall still fall within the scope of the present utility model.

Claims

1. A bottom drainage structure for a urea sensor, characterized in that, include: A urea tank, the bottom of which is provided with an installation port communicating with its internal storage space; A urea sensor is mounted on the urea tank and extends into the storage space. The urea sensor has a cooling pipe located within the storage space, and the bottom of the cooling pipe has an opening communicating with its internal pipes. A connecting pipe, one end of which is connected to the opening; A drainage assembly is connected to the outside of the mounting port, with one end of the drainage assembly inserted into the mounting port and connected to the other end of the connecting pipe. The drainage assembly has a drainage channel inside, one end of which communicates with the connecting pipe, and the other end of which forms a drainage outlet on the outside of the drainage assembly. A plugging assembly, which is connected to the drainage assembly and is used to plug or open the drainage outlet.

2. The urea sensor bottom drainage structure according to claim 1, characterized in that, The cooling pipe is provided with a connector at the opening, and the connecting pipe is connected to the connector.

3. The urea sensor bottom drainage structure according to claim 1, characterized in that, The bottom of the urea tank has an outward protrusion, and the mounting port is located inside the protrusion.

4. The urea sensor bottom drainage structure according to claim 3, characterized in that, The drainage assembly includes a drainage locking member and a drainage connector. The drainage connector abuts against the outer end of the protrusion, and one end of the drainage connector is inserted into the mounting port and connected to the connecting pipe. The drainage channel is disposed inside the drainage connector, and the drainage outlet is formed on the outer side of the drainage connector. The drainage locking member is sleeved on the drainage connector and connected to the protrusion to lock the drainage connector onto the protrusion. The sealing assembly is connected to the drainage connector.

5. The urea sensor bottom drainage structure according to claim 4, characterized in that, A sealing element is provided between the drain connector and the outer end of the protrusion.

6. The urea sensor bottom drainage structure according to claim 4, characterized in that, The drain connector includes a first connector and a second connector. One end of the first connector is inserted into the mounting port and connected to the connecting pipe. One end of the second connector is connected to the other end of the first connector and abuts against the outer end of the protrusion. The first connector has a first channel communicating with the connecting pipe, and the second connector has a second channel communicating with the first channel to form the drain channel. The drain outlet is formed on the outer side of the second connector. The drain locking member is sleeved on the second connector. The sealing assembly is connected to the other end of the second connector.

7. The urea sensor bottom drainage structure according to claim 4, characterized in that, The drain locking component is detachably connected to the protrusion.

8. The urea sensor bottom drainage structure according to claim 1, characterized in that, The sealing assembly includes a control valve, one end of which is connected to the drainage assembly, and the other end of which has a liquid outlet. The control valve is used to seal or open the drainage outlet.

9. The urea sensor bottom drainage structure according to claim 8, characterized in that, A switch handle is rotatably connected to the control valve. By rotating the switch handle, the control valve can be closed or opened, thereby blocking or opening the drain outlet.

10. The urea sensor bottom drainage structure according to claim 8, characterized in that, The sealing assembly also includes a plug, which is detachably inserted into the outlet and used to seal the outlet.

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