CN217111083U - Liquid level sensor, urea case and diesel vehicle with relieve jamming structure - Google Patents
Liquid level sensor, urea case and diesel vehicle with relieve jamming structure Download PDFInfo
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- CN217111083U CN217111083U CN202123451008.4U CN202123451008U CN217111083U CN 217111083 U CN217111083 U CN 217111083U CN 202123451008 U CN202123451008 U CN 202123451008U CN 217111083 U CN217111083 U CN 217111083U
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Abstract
The utility model provides a liquid level sensor with a jamming relieving structure, a urea box and a diesel vehicle; the tail gas treatment device comprises a reed switch, a buoy and at least one ultrasonic transducer, wherein a buoy tube is sleeved outside the reed switch, at least one end of the buoy tube is connected with the ultrasonic transducer, and the buoy is sleeved outside the buoy tube; aiming at the problem that the buoy of the liquid level sensor of the existing urea box is affected by urea crystallization to generate clamping stagnation, an ultrasonic transducer is preset on the liquid level sensor and is arranged close to a reed switch and the buoy, and vibration generated by the ultrasonic transducer acts on a buoy tube sleeved outside the reed switch, so that solid urea in the active area of the buoy is crushed, the clamping stagnation of the buoy is timely relieved, and the buoy can normally run.
Description
Technical Field
The utility model relates to a tail gas treatment structure field, in particular to level sensor, urea case and diesel vehicle with relieve jamming structure.
Background
When the tail gas of the diesel vehicle is treated, the tail gas is generally treated by an SCR (urea selective catalytic reduction) system, a urea box is arranged in the SCR system to provide urea solution for reduction for the SCR system, and an integrated liquid level sensor is arranged in the urea box to measure the liquid level in the urea box and feed back the liquid level in the urea box in order to timely master the liquid level of the urea solution in the urea box and ensure the normal and stable operation of the SCR system.
The reed pipe is integrated on the current urea box liquid level sensor, the measurement of the urea liquid level is realized by the aid of the matching of the floating barrel and the reed pipe, the floating barrel moves along the axial direction of the reed pipe under the action of urea solution, along with continuous consumption of the urea solution, urea is separated out and crystallized due to evaporation of part of water in the urea box, and when solid-liquid mixture is formed due to crystallization in the urea box, the floating barrel is easily blocked by solid urea crystals, so that the floating barrel cannot move along with the liquid level of the urea solution, and jamming faults are generated. When the jamming fault occurs to the existing urea box liquid level sensor, urea crystals around the floating barrel and the reed pipe are removed in a mode of detaching the liquid level sensor, and then the urea box liquid level sensor is installed again, so that the operation process is complex, the effect of timely relieving the jamming cannot be achieved, and the requirement is difficult to meet.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the defect that prior art exists, provide a level sensor, urea case and diesel vehicle with relieve jamming structure, predetermine ultrasonic transducer on level sensor to arrange it near tongue tube, flotation pontoon, the vibration that utilizes ultrasonic transducer to produce acts on the cover and establishes on the flotation pontoon pipe outside the tongue tube, thereby solid-state urea in the broken flotation pontoon activity area, thereby in time relieve the jamming of flotation pontoon, make the flotation pontoon can normal operating.
The utility model discloses a first purpose provides a level sensor with relieve jamming structure, adopts following technical scheme:
the dry reed pipe is sleeved with a floating pipe tube, at least one end of the floating pipe tube is connected with the ultrasonic transducer, and the floating pipe tube is sleeved with the floating pipe tube.
Furthermore, one end of the buoy tube is provided with a first ultrasonic transducer, the other end of the buoy tube is provided with a second ultrasonic transducer, and the buoy is located between the first ultrasonic transducer and the second ultrasonic transducer.
Furthermore, the reed pipe and the floating barrel pipe are coaxially arranged, and a gap is reserved between the circumferential direction of the reed pipe and the floating barrel pipe.
Furthermore, the buoy barrel pipe and the buoy are coaxially arranged, and a gap is reserved between the ring direction of the buoy barrel pipe and the buoy.
Furthermore, two ends of the reed pipe are connected with the sensor main body through supports respectively, and two ends of the floating pipe are connected with the supports respectively.
Further, the ultrasonic transducer is mounted on the bracket and fixed to the sensor body through the bracket.
Further, the ultrasonic transducer action area is connected with the buoy tube, and the ultrasonic transducer is arranged coaxially with the buoy tube.
The second objective of the present invention is to provide a urea tank, which utilizes the liquid level sensor with a structure for relieving clamping stagnation as mentioned above.
A third object of the present invention is to provide a diesel vehicle, comprising the urea tank as described above.
Further, the tail gas treatment system of the diesel vehicle adopts the urea box, and a liquid level sensor with a clamping stagnation removing structure is inserted into the urea box.
Compared with the prior art, the utility model has the advantages and positive effect be:
(1) aiming at the problem that the buoy of the liquid level sensor of the existing urea box is affected by urea crystallization to generate clamping stagnation, an ultrasonic transducer is preset on the liquid level sensor, the liquid level sensor is arranged close to a reed switch and the buoy, and vibration generated by the ultrasonic transducer acts on a buoy tube sleeved outside the reed switch, so that solid urea in the active area of the buoy is crushed, the clamping stagnation of the buoy is timely relieved, the buoy can normally operate, and the failure rate is reduced.
(2) The ultrasonic transducer is integrated on the reed switch of the liquid level sensor, the solid urea in the float bowl activity area is broken by utilizing the ultrasonic vibration principle, the direct contact with the float bowl is not needed, the influence on the operation of the float bowl is reduced, and the precision of the liquid level height of the urea solution is favorably ensured by matching the reed switch with the float bowl.
(3) Compare in the urea solid through the heating treatment urea incasement, can realize quick response through ultrasonic vibration, improve the crushing speed to the urea solid to, its application range limits at the flotation pontoon home range, and the scope of restraint broken urea solid reduces the influence of ultrasonic vibration to other positions.
(4) The urea solid is crushed through the ultrasonic transducer, the volume of the urea solid can be reduced, and when the liquid level sensor heats the urea solution, the crushed solid urea can be melted and thawed more easily, and the overall melting speed of the urea solution in the urea box is accelerated in cooperation.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
Fig. 1 is a schematic diagram of a reed switch, a buoy, and an ultrasonic transducer in one or more embodiments of the invention.
In the figure, 1 is a buoy, 2 is a buoy tube, and 3 is an ultrasonic transducer.
Detailed Description
Example 1
In a typical embodiment of the present invention, as shown in fig. 1, a liquid level sensor with a jamming relieving structure is provided.
The liquid level sensor with the structure of eliminating the clamping stagnation as shown in the figure 1 is used in a urea tank, in particular to a urea tank of an exhaust gas treatment system of a diesel vehicle, can measure the liquid level of a urea solution in the urea tank, and can also realize the measurement of the concentration of the urea through the attached structure; when the buoy 1 is blocked by urea solid generated by crystallization in the urea box, the urea solid around the buoy 1 can be crushed by the blockage removing structure, the blockage of the buoy 1 is removed, and normal liquid level measurement is realized.
The liquid level sensor with the clamping stagnation removing structure mainly achieves the functions of liquid level measurement and clamping stagnation removal in the embodiment, and therefore the liquid level sensor mainly comprises a sensor main body, a reed switch, a buoy 1, a buoy tube 2 and an ultrasonic transducer 3, wherein the buoy tube 2 is sleeved outside the reed switch, when the ultrasonic transducer 3 applies vibration to the buoy tube 2 for use, the buoy tube 2 protects the reed switch, the influence of ultrasonic vibration on the measurement precision of the reed switch is reduced, and the buoy 1 is sleeved outside the buoy tube 2; when urea solution is filled in the urea tank, the buoy 1 is in a floating state under the action of buoyancy of the urea solution and moves axially along the buoy barrel 2 along with the change of the liquid level of the urea solution, and meanwhile, the reed switch transmits the relative position data of the buoy 1 to a main control system of a vehicle to realize the feedback of the liquid level.
The sensor body, the buoy tube 2, the reed switch and the buoy 1 in the present embodiment can all adopt existing finished components, and a plurality of ultrasonic transducers 3 are installed on the basis of the sensor body.
As shown in fig. 1, the reed switch is mounted on the sensor body through a bracket, the brackets are respectively fitted to both ends of the reed switch, the brackets are also respectively connected to both ends of the float tube 2, and the ultrasonic transducer 3 is mounted on the brackets and is fixedly mounted on the sensor body through the brackets. The ultrasonic transducer 3 is connected to the power supply end of the sensor body, so that ultrasonic waves are output to vibrate the float tube 2, and the float tube 2 vibrates and crushes urea solids in the radial coverage range of the float tube 2.
In this embodiment, the urea solid around the buoy tube 2 is crushed to cover the position of the buoy 1, and therefore, in order to realize the vibration of the buoy tube 2, the ultrasonic transducer 3 is applied to the area connected to one end of the buoy tube 2, and the ultrasonic transducer 3 is arranged coaxially with the buoy tube 2. The buoy barrel 2 and the buoy 1 are coaxially arranged, and a gap is reserved between the ring direction of the buoy barrel 2 and the buoy 1.
It can be understood that in order to improve the vibration effect of the buoy tube 2 and the crushing capability of the buoy tube to the urea solid, the ultrasonic transducers 3 can be respectively arranged at the two ends of the buoy tube 2; one end of the buoy tube 2 is provided with a first ultrasonic transducer, the other end of the buoy tube is provided with a second ultrasonic transducer, and the buoy 1 is positioned between the first ultrasonic transducer and the second ultrasonic transducer; therefore, the action area of the first ultrasonic transducer is connected with one end of the buoy barrel 2, and the urea solid between the buoy 1 and the first ultrasonic transducer is mainly crushed; the action area of the second ultrasonic transducer is connected with the other end of the buoy tube 2, and urea solid between the buoy 1 and the second ultrasonic transducer is broken mainly through the action of ultrasonic waves.
It should be noted that, the first ultrasonic transducer and the second ultrasonic transducer are arranged oppositely, and can apply vibration with different frequencies to the urea solid in the area between the first ultrasonic transducer and the second ultrasonic transducer, so that the vibration crushing effect is improved.
Compared with the method for treating the urea solid in the urea box by heating, the method has the advantages that the quick response can be realized by ultrasonic vibration, the crushing speed of the urea solid is increased, the action range is limited at the positions close to the floating bobbin 2 and the floating bobbin 2, the range of the crushed urea solid is limited, and the influence of the ultrasonic vibration on other positions is reduced.
In order to reduce the influence of the ultrasonic transducer 3 on the reed switch measurement when vibrating the floating barrel pipe 2, the reed switch and the floating barrel pipe 2 are arranged coaxially, a gap is reserved between the ring direction of the reed switch and the floating barrel pipe 2, the reed switch and the floating barrel pipe 2 are arranged in a separated mode, small-range movement is reserved when the floating barrel pipe 2 vibrates, and collision caused by contact with the reed switch in the vibration state and the non-vibration state of the floating barrel pipe 2 is avoided.
In addition, on the premise of breaking the urea solid and removing the clamping stagnation between the buoy 1 and the buoy tube 2, a single ultrasonic transducer 3 is arranged, taking the orientation shown in fig. 1 as an example, the ultrasonic transducer 3 is positioned at the lower end of the reed switch, the buoy tube 2 is sleeved outside the reed switch, and the buoy 1 is sleeved outside the buoy tube 2 and above the ultrasonic transducer 3. When the device works, the ultrasonic transducer 3 generates vibration to drive the floating barrel tube 2 to vibrate at high frequency, and the urea solid in the floating barrel 1 is clamped by the vibration, so that the urea crystal attached to the outside of the floating barrel tube 2 is dispersed and glass. The volume of the urea solid crushed by the ultrasonic transducer 3 is obviously reduced, and the urea solid can be separated from the buoy barrel 2 and the buoy 1, so that the clamping stagnation of the buoy 1 is avoided.
With ultrasonic transducer 3 integration on level sensor, utilize the ultrasonic vibration principle, with the solid-state urea breakage of tongue tube and flotation pontoon 1 active area, need not direct contact flotation pontoon 1, reduce the influence to flotation pontoon 1 operation, be favorable to guaranteeing that the tongue tube cooperates flotation pontoon 1 to measure the precision of getting urea solution liquid level height.
It is understood that in other embodiments, the number of the ultrasonic transducers 3 may also be adjusted, for example, two, three, etc., corresponding second ultrasonic transducers, third ultrasonic transducers, etc. are disposed at other positions of the sensor body, and vibration is applied to other desired positions to perform urea solid vibration crushing.
The influence of the ultrasonic vibration on other parts in the urea tank is also considered while arranging other ultrasonic transducers 3, so that the interference on other elements is reduced.
Example 2
In another exemplary embodiment of the present invention, as shown in fig. 1, a urea tank is provided using a level sensor with a structure for relieving the clamping stagnation as in example 1.
A liquid level sensor with a clamping stagnation removing structure is arranged in the urea box, the liquid level sensor with the clamping stagnation removing structure is inserted into the urea box and used for measuring the liquid level volume of the urea solution in the urea box, and the problem that the float 1 is clamped by the urea solid can be solved; for the detailed structure of the liquid level sensor with the structure for removing the clamping stagnation, referring to embodiment 1, since the urea tank adopts the liquid level sensor with the structure for removing the clamping stagnation provided in embodiment 1, the beneficial effects of the urea tank brought by the liquid level sensor with the structure for removing the clamping stagnation refer to the corresponding parts in embodiment 1, and are not described herein again.
For other structures of the urea box, which are not mentioned, the existing structure can be adopted.
Example 3
In another exemplary embodiment of the present invention, as shown in fig. 1, a diesel vehicle is provided, using a urea tank as in example 2.
The diesel vehicle is equipped with an exhaust gas treatment system, and the urea tank of the exhaust gas treatment system is the urea tank in the embodiment 3, and the exhaust gas of the diesel vehicle engine is treated by the exhaust gas treatment system. Since the exhaust gas treatment system in the diesel vehicle adopts the liquid level sensor with the structure for removing the clamping stagnation provided in the above embodiment 1, for the beneficial effects brought by the liquid level sensor with the structure for removing the clamping stagnation of the diesel vehicle, reference is made to the corresponding parts in the above embodiment 1, and details are not repeated here.
For other structures in the diesel vehicle not mentioned, an existing structure may be adopted.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The liquid level sensor with the clamping stagnation removing structure is characterized by comprising a reed switch, a buoy and at least one ultrasonic transducer, wherein a buoy tube is sleeved outside the reed switch, at least one end of the buoy tube is connected with the ultrasonic transducer, and the buoy is sleeved outside the buoy tube.
2. The fluid level sensor with a structure for relieving binding-back of claim 1, wherein the buoy tube is provided with a first ultrasonic transducer at one end and a second ultrasonic transducer at the other end, and the buoy is positioned between the first ultrasonic transducer and the second ultrasonic transducer.
3. The level sensor with a structure for relieving clamping stagnation of claim 1, characterized in that the reed switch and the float tube are arranged coaxially, and a gap is left between the circumferential direction of the reed switch and the float tube.
4. The level sensor with a jam-relief structure of claim 3 wherein the float tube is disposed coaxially with the float bowl with a gap between the float tube annulus and the float bowl.
5. The liquid level sensor with a structure for relieving clamping stagnation of claim 1, wherein two ends of the reed switch are respectively connected with the sensor main body through a bracket, and two ends of the float tube are respectively connected with the bracket.
6. The level sensor with a structure for relieving clamping stagnation of claim 5, characterized in that the ultrasonic transducer is mounted on a bracket and fixed on the sensor body through the bracket.
7. The level sensor with a structure for relieving stagnation of claim 6, characterized in that the ultrasonic transducer active area is connected with a float tube, and the ultrasonic transducer is arranged coaxially with the float tube.
8. A urea tank, characterized in that a level sensor with a jam-release structure as claimed in any one of claims 1-7 is installed.
9. A diesel vehicle, characterized by comprising a urea tank according to claim 8.
10. The diesel vehicle of claim 9, wherein an exhaust gas treatment system of the diesel vehicle employs the urea tank, and the level sensor with the seizure relieving structure protrudes into the urea tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123451008.4U CN217111083U (en) | 2021-12-31 | 2021-12-31 | Liquid level sensor, urea case and diesel vehicle with relieve jamming structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123451008.4U CN217111083U (en) | 2021-12-31 | 2021-12-31 | Liquid level sensor, urea case and diesel vehicle with relieve jamming structure |
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| CN217111083U true CN217111083U (en) | 2022-08-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115388991A (en) * | 2022-08-25 | 2022-11-25 | 潍柴动力股份有限公司 | Liquid level sensor floater fault diagnosis method and device and storage medium |
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2021
- 2021-12-31 CN CN202123451008.4U patent/CN217111083U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115388991A (en) * | 2022-08-25 | 2022-11-25 | 潍柴动力股份有限公司 | Liquid level sensor floater fault diagnosis method and device and storage medium |
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