CN216410544U

CN216410544U - Urea sensor and air guide signal wire

Info

Publication number: CN216410544U
Application number: CN202122347544.3U
Authority: CN
Inventors: 覃东; 周锦威; 黄志耀
Original assignee: Zhaoqing Aodiwei Sensing Technology Co ltd
Current assignee: Zhaoqing Aodiwei Sensing Technology Co ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2022-04-29
Anticipated expiration: 2031-09-27

Abstract

The utility model relates to a urea sensor and an air guide signal wire. The gas guide signal line includes: elastic shrinkage cover, signal line body and gas transmission pipe fitting, elastic shrinkage cover is established the signal line body is outside, elastic shrinkage sheathes in and is equipped with the installation arch, the installation arch with the outer wall cooperation of signal line body form with the fixed part of gas transmission pipe fitting circumference conflict, just the opening chi footpath of fixed part with the pipe diameter of gas transmission pipe fitting suits, the inlet end of gas transmission pipe fitting inserts the fixed part, the end of giving vent to anger of gas transmission pipe fitting is used for stretching into inside the sensor housing. The air guide signal wire can avoid the elastic shrinkage sleeve from influencing the installation caliber of the signal wire body, and the installation cost of the urea sensor is reduced.

Description

Urea sensor and air guide signal wire

Technical Field

The utility model relates to the technical field of urea sensor assembly, in particular to a urea sensor and an air guide signal wire.

Background

When assembling the urea sensor, need be used for testing the gas tightness with signal line and trachea cooperation installation. When assembling the signal line and the air pipe, the air pipe is sleeved into the signal line, the outer diameter of the signal line can be increased under the assembly of the air pipe, the assembly size of the matched part is increased accordingly, and the installation cost of the urea sensor is increased.

SUMMERY OF THE UTILITY MODEL

In view of this, it is necessary to provide a urea sensor and an air guide signal line, which are directed to the problem that the outer diameter of the signal line itself is increased in the air pipe and the installation cost of the urea sensor is increased.

An air guide signal wire. The gas guide signal line includes: elastic shrinkage cover, signal line body and gas transmission pipe fitting, elastic shrinkage cover is established the signal line body is outside, elastic shrinkage sheathes in and is equipped with the installation arch, the installation arch with the outer wall cooperation of signal line body form with the fixed part of gas transmission pipe fitting circumference conflict, just the opening chi footpath of fixed part with the pipe diameter of gas transmission pipe fitting suits, the inlet end of gas transmission pipe fitting inserts the fixed part, the end of giving vent to anger of gas transmission pipe fitting is used for stretching into inside the sensor housing.

A urea sensor comprises an air guide signal wire and a sensor body, wherein the air guide signal wire is matched with the sensor body in an installation mode.

In one of them embodiment, the signal line body still includes outer insulating cover, shield cover and tinned wire, the tinned wire is inserted and is established in the shield cover, outer insulating cover is established the outside of shield cover, elastic shrinkage cover is established outside the outer insulating cover, the installation arch with outer insulating cover cooperation forms the fixed part.

In one of them embodiment, the sensor body includes sensing probe, connecting piece and reflector plate, be equipped with the pilot hole on the sensing probe, the air guide signal line with the sealed cooperation of pore wall of pilot hole, the air guide signal line with sensing probe electric property cooperation, just the gas transmission pipe fitting is used for carrying external gas extremely inside the sensing probe, the connecting piece is installed on the sensing probe, the reflector plate passes through the connecting piece with sensing probe movably interval sets up, just the reflector plate be used for to sensing probe reflection processing signal.

In one embodiment, the reflector plate is sleeved outside the connecting piece, and the reflector plate can move up and down along the axial direction of the connecting piece.

In one embodiment, the sensing probe comprises a metal mounting shell, a damping part and a piezoelectric part, the metal mounting shell is provided with the assembling hole, the piezoelectric part is located in the metal mounting shell, the piezoelectric part is mounted at the bottom of the metal mounting shell, the damping part is filled in the metal mounting shell, the damping part covers the piezoelectric part, a processing interval is reserved between the damping part and the end part of the metal mounting shell, and the air outlet end of the air pipe extends into the processing interval through the damping part.

In one embodiment, the sensing probe further comprises a metal mounting cover, a mounting through hole is formed in the end portion of the metal mounting shell, the metal mounting cover is used for covering the metal mounting shell, and the metal mounting cover is in sealing fit with the mounting through hole.

In one embodiment, an end of the metal mounting shell is provided with a mounting concave portion, the mounting concave portion is provided with the mounting through hole, and the metal mounting shell is mounted in the mounting concave portion.

In one embodiment, the sensing probe further comprises an adhesive, and the piezoelectric element is adhered to the bottom of the metal mounting shell through the adhesive.

In one embodiment, the urea sensor further comprises an adapter connector and a pressurizing sleeve, the adapter connector is sleeved outside the gas guide signal wire, one end of the adapter connector is connected with the metal mounting shell in a sealing mode, the other end of the adapter connector is connected with the pressurizing sleeve in a sealing mode, and the gas transmission pipe fitting is communicated with the pressurizing sleeve.

When the air guide signal wire is assembled, firstly, the elastic shrinkage sleeve is sleeved outside the signal wire body, for example: the length of the elastic shrinkage nesting signal line body can be determined according to installation requirements. Then, the shape of the mounting protrusion is determined according to the caliber and the shape of the gas transmission pipe fitting to be assembled, so that after the gas transmission pipe fitting is inserted into the fixing part, the mounting protrusion and the side wall of the signal line body can be fully attached to the gas transmission pipe fitting, and the fixing effect of the fixing part on the gas transmission pipe fitting is guaranteed. Further, the opening size of the fixing part is adapted to the pipe diameter of the gas transmission pipe, for example: the diameter of the opening of the fixing part is equal to the diameter of the gas transmission pipe, or the diameter of the opening of the fixing part is slightly smaller than the diameter of the gas transmission pipe (the gas transmission pipe is inserted into the fixing part and does not influence the gas outlet of the gas transmission pipe). Compared with the traditional signal line, the gas transmission pipe fitting is fixed outside the signal line through the elastic shrinkage sleeve, meanwhile, the gas transmission pipe fitting does not need to be integrally matched with the signal line body in an installation mode, the signal line body is not bent and extruded when being bent, when the gas transmission signal line is installed, the elastic shrinkage sleeve can perform corresponding elastic shrinkage according to the opening size of the target assembling port, namely, the elastic shrinkage sleeve can be prevented from influencing the installing caliber of the signal line body, and the installation cost of the urea sensor is reduced.

Above-mentioned urea sensor is when using, utilize air guide signal line and sensor body installation cooperation, compare in traditional signal line, above-mentioned air guide signal line has realized the fixed of gas transmission pipe fitting in the signal line outside through the elastic shrinkage cover, and simultaneously, the gas transmission pipe fitting need not wholly and signal line body installation cooperation, make the signal line body when buckling the gas transmission pipe fitting extrusion of can not buckling, when installing the air guide signal line, the elastic shrinkage cover can carry out corresponding elastic shrinkage according to the opening size of target assembly port, can avoid the elastic shrinkage cover to influence the bore of installing of signal line body promptly, the installation cost of urea sensor has been reduced.

Drawings

FIG. 1 is a schematic cross-sectional view of an air guide signal wire;

FIG. 2 is a schematic diagram of the internal structure of a urea sensor;

fig. 3 is a schematic view of the installation structure of the urea sensor.

100. Elastic shrink sleeve, 110, mounting protrusion, 120, fixing part, 200, signal line body, 210, outer insulating sleeve, 220, shielding sleeve, 230, tinned copper wire, 300, gas transmission pipe fitting, 400, sensor body, 410, sensing probe, 411, metal mounting shell, 412, damping piece, 413, piezoelectric element, 414, processing interval, 415, mounting recess, 416, adhesive, 417, metal mounting cover, 420, connecting piece, 430, reflection sheet, 500, adapter, 600, pressure sleeve.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

As shown in connection with fig. 1, in one embodiment, the gas guide signal wire comprises: elastic shrinkage cover 100, signal line body 200 and gas transmission pipe fitting 300, elastic shrinkage cover 100 cover is established signal line body 200 is outside, be equipped with installation arch 110 on the elastic shrinkage cover 100, installation arch 110 with the outer wall cooperation of signal line body 200 form with the fixed part 120 of gas transmission pipe fitting 300 circumference conflict, just the opening chi footpath of fixed part 120 with the pipe diameter of gas transmission pipe fitting 300 suits, the inlet end of gas transmission pipe fitting 300 inserts fixed part 120, the end of giving vent to anger of gas transmission pipe fitting 300 is used for stretching into inside the sensor housing.

When the air guide signal wire is assembled, the elastic shrinkage sleeve 100 is firstly sleeved outside the signal wire body 200, for example: the sheathing length of the elastic shrinkage sheath 100 and the signal line body 200 can be determined according to the installation requirement. Then, the shape of the mounting protrusion 110 is determined according to the caliber and the shape of the gas transmission pipe 300 to be assembled, so that after the gas transmission pipe 300 is inserted into the fixing portion 120, the mounting protrusion 110 and the side wall of the signal line body 200 can be fully attached to the gas transmission pipe 300, and the fixing effect of the fixing portion 120 on the gas transmission pipe 300 is ensured. Further, the diameter of the opening of the fixing portion 120 is adapted to the pipe diameter of the gas pipe 300, for example: the diameter of the opening of the fixing portion 120 is equal to the diameter of the gas pipe, or the diameter of the opening of the fixing portion 120 is slightly smaller than the diameter of the gas pipe 300 (the gas pipe 300 is inserted into the fixing portion 120 without affecting the gas outlet of the gas pipe 300). Compared with the traditional signal line, the air guide signal line realizes the fixation of the air transmission pipe fitting 300 outside the signal line through the elastic shrinkage sleeve 100, meanwhile, the air transmission pipe fitting 300 does not need to be integrally installed and matched with the signal line body 200, so that the air transmission pipe fitting 300 cannot be bent and extruded when the signal line body 200 is bent, when the air guide signal line is installed, the elastic shrinkage sleeve 100 can perform corresponding elastic shrinkage according to the size of an opening of a target assembling port, namely, the elastic shrinkage sleeve 100 can be prevented from influencing the installing caliber of the signal line body 200, and the installing cost of the urea sensor is reduced.

Referring to fig. 1, in an embodiment, the signal line body 200 further includes an outer insulating sleeve 210, a shielding sleeve 220 and a tinned copper wire 230, the tinned copper wire 230 is inserted into the shielding sleeve 220, the outer insulating sleeve 210 is sleeved outside the shielding sleeve 220, the elastic shrinkage sleeve 100 is sleeved outside the outer insulating sleeve 210, and the mounting protrusion 110 and the outer insulating sleeve 210 cooperate to form the fixing portion 120. Specifically, such an embodiment as described above can avoid interference of an external interference signal to the signal line body 200. Further, compared with the conventional copper wire, the tin-plated copper wire 230 can further improve the corrosion resistance and oxidation resistance of the copper wire, and can greatly prolong the service life of the signal wire body 200.

In an embodiment, when the urea sensor is used, the air guide signal line is installed and matched with the sensor body 400, compared with a traditional signal line, the air guide signal line realizes the fixation of the air transmission pipe 300 outside the signal line through the elastic shrinkage sleeve 100, meanwhile, the air transmission pipe 300 does not need to be installed and matched with the signal line body 200 integrally, so that the air transmission pipe 300 cannot be bent and extruded when the signal line body 200 is bent, when the air guide signal line is installed, the elastic shrinkage sleeve 100 can perform corresponding elastic shrinkage according to the size of an opening of a target assembling port, that is, the elastic shrinkage sleeve 100 can be prevented from influencing the installing caliber of the signal line body 200, and the installation cost of the urea sensor is reduced.

Referring to fig. 1 to 3, in an embodiment, the sensor body 400 includes a sensing probe 410, a connecting member 420, and a reflective sheet 430, the sensing probe 410 is provided with an assembly hole, the air guide signal line is in sealed fit with a hole wall of the assembly hole, the air guide signal line is in electrical fit with the sensing probe 410, the air transmission pipe 300 is used for transmitting external air to the inside of the sensing probe 410, the connecting member 420 is mounted on the sensing probe 410, the reflective sheet 430 is movably disposed at an interval with the sensing probe 410 through the connecting member 420, and the reflective sheet 430 is used for reflecting a processing signal to the sensing probe 410. Specifically, the sensor body 400 may be installed in cooperation with a diesel engine, that is, used to detect the concentration of a urea solution in an exhaust gas treatment system of the diesel engine. For example: the reflective sheet 430 is immersed in the urea solution under the support of the connection member 420, and the reflective sheet 430 can reflect a corresponding optical signal to the sensor body 400 by using the tof (Time of Flight) principle, so that the sensor body 400 (according to the use requirement, a corresponding processor, such as a signal receiver, an image processor, a signal board, etc., is further disposed in the sensor body 400) can measure a corresponding solution depth, and finally calculate a corresponding concentration of the urea solution. Further, the reflection sheet 430 is sleeved outside the connection member 420, and the reflection sheet 430 can move up and down along the axial direction of the connection member 420. Such an embodiment as described above facilitates detection by the urea sensor even more.

As shown in fig. 2 to 3, in an embodiment, the sensing probe 410 includes a metal mounting shell 411, a damping member 412 and a piezoelectric member 413, the metal mounting shell 411 is provided with the assembling hole, the piezoelectric member 413 is located in the metal mounting shell 411, the piezoelectric member 413 is installed at the bottom of the metal mounting shell 411, the damping member 412 is filled in the metal mounting shell 411, the damping member 412 covers the piezoelectric member 413, a processing space 414 is left between the damping member 412 and an end of the metal mounting shell 411, and an air outlet end of the air pipe 300 extends into the processing space 414 through the damping member 412. Specifically, the piezoelectric element 413 is a piezoelectric sheet or a piezoelectric ceramic. The mounting effect of the piezoelectric element 413 in the metal mounting case 411 is ensured by the damping member 412. By reserving the processing space 414 in the metal mounting case 411 and injecting gas of a predetermined pressure into the processing space 414, the sealability of the urea sensor can be determined based on the change in the gas pressure of the gas in the processing space 414.

In one embodiment, as shown in fig. 2, the sensing probe 410 further includes a metal mounting cover 417, a mounting through hole is formed at an end of the metal mounting shell 411, the metal mounting cover 417 is configured to cover the metal mounting shell 411, and the metal mounting cover 417 is attached to the mounting through hole in a sealing manner. An installation concave part 415 is formed at an end of the metal installation shell 411, the installation through hole is formed in the installation concave part 415, and the metal installation shell 411 is installed in the installation concave part 415. Specifically, by forming the mounting through hole on the metal mounting shell 411, it is convenient to mount or inspect and repair the devices in the metal mounting shell 411. After the components such as the damping member 412 and the piezoelectric member 413 are mounted in the metal mounting case 411, the metal mounting cover 417 covers and seals the mounting opening, that is, the sealing performance of the whole metal mounting case 411 is ensured. Further, when the metal mounting cover 417 is selected, the area of the end surface of the metal mounting cover 417 is larger than the opening area of the mounting through hole, and it is ensured that the metal mounting cover 417 can sufficiently seal the mounting through hole. The metal mounting case 411 is provided with the mounting recess 415, the metal mounting cover 417 is fitted into the mounting recess 415, and the metal mounting cover 417 is circumferentially fitted to the mounting recess 415, whereby the above embodiment secures the fixing effect of the metal mounting cover 417 to the metal mounting case 411.

In one embodiment, as shown in fig. 2, the sensing probe 410 further includes an adhesive 416, and the piezoelectric element 413 is adhered to the bottom of the metal mounting shell 411 through the adhesive 416. Specifically, the adhesive 416 is a sealant or epoxy. The fixing effect of the piezoelectric element 413 on the bottom of the metal mounting case 411 is improved by the adhesive 416.

Referring to fig. 3, in an embodiment, the urea sensor further includes an adapter 500 and a pressure sleeve 600, the adapter 500 is sleeved outside the air guide signal line, one end of the adapter 500 is hermetically connected to the metal mounting shell 411, the other end of the adapter 500 is hermetically connected to the pressure sleeve 600, and the air pipe 300 is communicated with the pressure sleeve 600. Specifically, the air guide signal line can be more conveniently fixed to the metal mounting case 411 by using the adapter 500. Meanwhile, the pressurizing sleeve 600 and the adapter 500 are fixedly sleeved. That is, under the effect of the adapter 500, the airtightness between the pressurizing sleeve 600, the air guide signal line, and the metal mounting case 411 can be sufficiently ensured.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An air guide signal wire, characterized in that the air guide signal wire comprises: elastic shrinkage cover, signal line body and gas transmission pipe fitting, elastic shrinkage cover is established the signal line body is outside, elastic shrinkage sheathes in and is equipped with the installation arch, the installation arch with the outer wall cooperation of signal line body form with the fixed part of gas transmission pipe fitting circumference conflict, just the opening chi footpath of fixed part with the pipe diameter of gas transmission pipe fitting suits, the inlet end of gas transmission pipe fitting inserts the fixed part, the end of giving vent to anger of gas transmission pipe fitting is used for stretching into inside the sensor housing.

2. The air guide signal wire of claim 1, wherein the signal wire body further comprises an outer insulating sleeve, a shielding sleeve and a tinned copper wire, the tinned copper wire is inserted into the shielding sleeve, the outer insulating sleeve is sleeved outside the shielding sleeve, the elastic shrinkage sleeve is sleeved outside the outer insulating sleeve, and the mounting protrusion and the outer insulating sleeve are matched to form the fixing portion.

3. A urea sensor, comprising the air guide signal wire of any one of claims 1 to 2, and further comprising a sensor body, wherein the air guide signal wire is installed and matched with the sensor body.

4. The urea sensor according to claim 3, wherein the sensor body comprises a sensing probe, a connecting member and a reflecting plate, the sensing probe is provided with an assembly hole, the air guide signal line is in sealing fit with the wall of the assembly hole, the air guide signal line is electrically matched with the sensing probe, the air transmission pipe is used for transmitting outside air to the inside of the sensing probe, the connecting member is arranged on the sensing probe, the reflecting plate is movably arranged at intervals with the sensing probe through the connecting member, and the reflecting plate is used for reflecting processing signals to the sensing probe.

5. The urea sensor according to claim 4, wherein the reflection sheet is sleeved outside the connecting member, and the reflection sheet can move up and down along the axial direction of the connecting member.

6. The urea sensor according to claim 4, wherein the sensing probe comprises a metal mounting shell, a damping member and a piezoelectric member, the metal mounting shell is provided with the assembling hole, the piezoelectric member is located in the metal mounting shell, the piezoelectric member is installed at the bottom of the metal mounting shell, the damping member is filled in the metal mounting shell, the damping member covers the piezoelectric member, a processing interval is reserved between the damping member and the end of the metal mounting shell, and the air outlet end of the air pipe extends into the processing interval through the damping member.

7. The urea sensor according to claim 6, wherein the sensing probe further comprises a metal mounting cover, a mounting through hole is formed in an end portion of the metal mounting shell, the metal mounting cover is used for covering the metal mounting shell, and the metal mounting cover is in sealing fit with the mounting through hole.

8. The urea sensor according to claim 7, wherein a mounting recess is formed at an end of the metal mounting shell, the mounting through hole is formed in the mounting recess, and the metal mounting shell is mounted in the mounting recess.

9. The urea sensor according to claim 6, wherein the sensing probe further comprises an adhesive, and the piezoelectric element is adhered to the bottom of the metal mounting shell through the adhesive.

10. The urea sensor according to any one of claims 6 to 9, further comprising an adapter and a pressurizing sleeve, wherein the adapter is sleeved outside the gas guide signal line, one end of the adapter is hermetically connected with the metal mounting shell, the other end of the adapter is hermetically connected with the pressurizing sleeve, and the gas transmission pipe is communicated with the pressurizing sleeve.