CN110849490A - Treatment method and treatment device for high-temperature sensor probe shell for automobile exhaust - Google Patents
Treatment method and treatment device for high-temperature sensor probe shell for automobile exhaust Download PDFInfo
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- CN110849490A CN110849490A CN201911063749.XA CN201911063749A CN110849490A CN 110849490 A CN110849490 A CN 110849490A CN 201911063749 A CN201911063749 A CN 201911063749A CN 110849490 A CN110849490 A CN 110849490A
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- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
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- G01K1/10—Protective devices, e.g. casings for preventing chemical attack
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Abstract
The invention relates to a treatment method and a treatment device for a high-temperature sensor probe shell for automobile exhaust, wherein the method comprises the following steps: the high-temperature treatment process comprises the steps of carrying out high-temperature treatment on a probe shell of the high-temperature sensor, wherein the high-temperature treatment process comprises the steps of placing the probe shell in an environment with the temperature of 900-1000 ℃ for heat preservation, and simultaneously maintaining the flow of ambient oxygen at 40-100 ml/min for 5-8 h; and a cooling process, namely cooling the probe shell subjected to the high-temperature treatment process. The invention has the beneficial effects that the probe shell of the high-temperature sensor is subjected to high-temperature treatment in advance, and the environment of the probe shell is maintained at certain oxygen concentration during the high-temperature treatment, so that the surface of the probe shell forms an effective oxidation blackening protective layer and is in a bright shape; the oxidation resistance and the corrosion resistance of the probe shell are enhanced, the adhesion of carbon-containing substances in tail gas on the surface of the probe shell is effectively reduced, the phenomenon of carbon on the surface area of the probe shell is improved, and the response speed of the probe is favorably improved.
Description
Technical Field
The invention belongs to the technical field of vehicle sensors, and particularly relates to a method and a device for treating a high-temperature sensor probe shell for automobile exhaust.
Background
Automobile exhaust contains a great many compounds, and among the pollutants, there are suspended solid particles, carbon monoxide, carbon dioxide, hydrocarbons, nitrogen oxides, lead, sulfur oxides, and the like. The tail gas makes the environment in the exhaust pipeline special, so that firstly, the environment temperature is high, and secondly, acidic and corrosive substances discharged after the engine does work become polluted environment when the tail gas temperature sensor works. When automobile exhaust is discharged, carbon-containing particles in the exhaust mixed with substances such as engine oil steam and the like can be attached to the passing place of the exhaust, so that the surface of a sensor probe shell is polluted, carbon is easily deposited on the surface of the sensor probe shell, and the carbon is accumulated more and more along with the increase of working time. The more serious the carbon deposition on the surface of the sensor probe shell is, the longer the response time of the sensor is, so that the sensor cannot accurately respond.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a method and a device for treating a high-temperature sensor probe shell for automobile exhaust.
In order to achieve the purpose, the invention adopts the technical scheme that:
the method for treating the high-temperature sensor probe shell for the automobile exhaust comprises the following steps:
the high-temperature treatment process comprises the steps of carrying out high-temperature treatment on a probe shell of the high-temperature sensor, wherein the high-temperature treatment process comprises the steps of placing the probe shell in an environment with the temperature of 900-1000 ℃ for heat preservation, and simultaneously maintaining the flow of ambient oxygen at 40-100 ml/min for 5-8 h;
and a cooling process, namely cooling the probe shell subjected to the high-temperature treatment process.
Preferably, the probe shell comprises an ultrasonic cleaning process before the high-temperature treatment process is performed, and the ultrasonic cleaning process is used for removing impurities and pollutants on the surface of the probe shell of the high-temperature sensor.
Preferably, in the high-temperature treatment step, the temperature is selected to be 950 ℃.
Preferably, in the high-temperature treatment process, the oxygen flow is 60ml/min, and the oxygen maintaining time is 6 h.
Preferably, in the high-temperature treatment process, the heat preservation time is 5-8 h.
The high-temperature sensor probe shell processing device for the automobile exhaust comprises a high-temperature furnace, wherein the high-temperature furnace comprises a rectangular outer shell, a furnace chamber is arranged in the rectangular outer shell, and an opening and closing door is arranged on the front end face of the rectangular outer shell corresponding to the position of the furnace chamber; a plurality of partition plates are horizontally arranged in the furnace cavity and used for placing a probe shell of a high-temperature sensor; the side wall of the furnace chamber is provided with an air inlet and an air outlet, and the air inlet and the air outlet are respectively connected with an air inlet pipeline and an air outlet pipeline; and a disturbance structure is arranged in the furnace chamber and is used for disturbing the air flow in the furnace chamber to circularly flow.
In a preferable scheme, the partition plate is uniformly provided with partition holes, and the partition holes are used for vertically placing the probe shell on the partition plate and limiting the probe shell from falling off; the baffle plate is provided with an air guide hole for air flow circulation in the furnace cavity.
In a preferable scheme, the air inlet pipeline is arranged at the top of the furnace chamber and comprises an air inlet main pipe and air inlet branch pipes, the air inlet main pipe is connected with an air inlet, the air inlet branch pipes and the air inlet main pipe are arranged in a comb shape, and the intervals of the air inlet branch pipes are equal; the air inlet branch pipes are uniformly provided with air inlet openings facing the bottom of the furnace chamber along the axial direction, and the air inlet openings are distributed in a delta shape by three air inlet holes; the adjacent air inlet openings are equal in distance, and the air inlet openings of the adjacent air inlet branch pipes are arranged in a staggered mode.
In a preferred scheme, the air outlet pipeline is arranged at the bottom of the furnace chamber, the air outlet pipeline comprises an air outlet main pipe and air outlet branch pipes, the air outlet main pipe is connected with the air outlet, the air outlet branch pipes and the air outlet main pipe are arranged in a comb shape, and the air outlet branch pipes are equal in distance; the air outlet branch pipes are uniformly provided with air outlet openings facing the top of the furnace chamber along the axial direction, and the air outlet openings are distributed in a delta shape by three air outlet holes; the distance between the adjacent air outlet openings is equal, and the air outlet openings of the adjacent air outlet branch pipes are arranged in a staggered mode.
In a preferred scheme, a flow-limiting grid is arranged above the air outlet pipeline of the furnace chamber.
Preferably, the disturbance structure comprises an impeller, and the impeller comprises a transmission shaft and at least two groups of blades; the transmission shaft vertically extends into the furnace cavity from the outside of the top of the rectangular shell, the transmission shaft partially works in the furnace cavity and partially works outside the furnace cavity, a heat insulation pad is arranged at the transmission shaft part which works outside the furnace cavity, the transmission shaft is connected with a motor, and the motor is positioned outside the high-temperature furnace; the wind direction formed by the group of blades arranged close to the top of the furnace chamber faces the bottom of the furnace chamber, and the wind direction formed by the group of blades arranged far away from the top of the furnace chamber faces the top of the furnace chamber.
Preferably, the perturbation structures are at least provided in two groups and are respectively close to the left side and the right side of the furnace chamber.
Preferably, the side wall and/or the top wall of the rectangular shell is provided with a vent hole, and a sealing cover capable of being opened and closed is correspondingly arranged at the vent hole.
Preferably, the opening and closing door is provided with a handle.
In the preferred scheme, the air inlet pipeline and the air outlet pipeline are respectively provided with an air inlet valve and an air outlet valve which are positioned outside the high-temperature furnace and correspond to the air inlet and the air outlet.
The invention has the beneficial effects that the method and the device for treating the high-temperature sensor probe shell for the automobile exhaust are provided, the high-temperature sensor probe shell is subjected to high-temperature treatment in advance, and the certain oxygen concentration of the environment where the probe shell is positioned is maintained during the high-temperature treatment, so that an effective oxidation blackening protective layer is formed on the surface of the probe shell and is in a bright shape; the oxidation resistance and the corrosion resistance of the probe shell are enhanced, the adhesion of carbon-containing substances in tail gas on the surface of the probe shell is effectively reduced, the carbon phenomenon on the surface area of the probe shell is improved, the response speed of the probe is favorably improved, and the long-term service life of the probe can be prolonged; before high-temperature treatment is carried out, the probe shell of the high-temperature sensor is subjected to ultrasonic cleaning, so that impurities such as dust or other pollutants on the surface of the probe shell can be effectively removed, and the effect of a high-temperature treatment process is facilitated; the disturbance structure is arranged to drive the oxygen flow in the furnace chamber universe to circularly flow and be uniformly mixed; further set up two sets of blades, the wind direction that a set of blade that is close to the setting of furnace chamber top forms is towards the furnace chamber bottom, and the wind direction that a set of blade that keeps away from the setting of furnace chamber top forms is towards the furnace chamber top, and the wind direction that makes two sets of blades form is relative, forms two streams of relative air current and strikes each other when disturbing oxygen flow to further strengthen the circulation flow of oxygen flow in the furnace chamber in the universe.
Description of the drawings:
FIG. 1 is a schematic external structural view of a high temperature sensor probe housing processing device for automobile exhaust according to an embodiment of the present invention;
FIG. 2 is a schematic view of an internal structure of a probe housing processing device of a high temperature sensor for automobile exhaust according to an embodiment of the present invention;
FIG. 3 is a schematic view of the structure inside the furnace chamber according to the embodiment of the present invention;
FIG. 4 is a schematic bottom view of an intake duct according to an embodiment of the present invention;
fig. 5 is a schematic top view of the air outlet pipe according to the embodiment of the present invention.
Description of the reference numerals
1. The device comprises a rectangular shell, 11. an opening and closing door, 111. a handle, 2. a furnace chamber, 21. a partition board, 211. an air guide hole, 22. a flow limiting grid, 3. an air inlet pipeline, 31. an air inlet main pipe, 32. an air inlet branch pipe, 33. an air inlet opening, 331. an air inlet hole, 4. an air outlet pipeline, 41. an air outlet main pipe, 42. an air outlet branch pipe, 43. an air outlet opening, 431. an air outlet hole, 5. a probe shell, 61. a blade, 62. a transmission shaft and 63. a motor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides the following embodiments:
the method for treating the high-temperature sensor probe shell for the automobile exhaust comprises the following steps:
the high-temperature treatment process comprises the steps of carrying out high-temperature treatment on a probe shell of the high-temperature sensor, wherein the high-temperature treatment process comprises the steps of placing the probe shell in an environment with the temperature of 900-1000 ℃ for heat preservation, and simultaneously maintaining the flow of ambient oxygen at 40-100 ml/min for 5-8 h;
and a cooling process, namely cooling the probe shell subjected to the high-temperature treatment process.
Generally, a temperature measuring element of a high-temperature sensor for automobile exhaust is placed in a probe shell for protection, and a gap between the temperature measuring element and the probe shell is filled with a high-heat-conduction material so as to effectively ensure temperature conduction. The probe shell is the most direct end of the high-temperature sensor contacting the high-temperature environment in the exhaust pipeline, and if the surface area of the probe shell of the high-temperature sensor is carbon, the response speed of the high-temperature sensor is reduced, and the accuracy of temperature measurement of the high-temperature sensor is also caused. Therefore, in the present example, the high temperature sensor probe case is subjected to a high temperature treatment in advance, and the environment in which the probe case is placed is maintained at a constant oxygen concentration during the high temperature treatment, and Cr in the stainless steel material used for the probe case is likely to form FeO. Cr at a high temperature2O3、FeO·Fe2O3And spinel structure (FeCr)2O4，NiCr2O4) The protective oxide film is formed, so that an effective oxidation blackening protective layer is formed on the surface of the probe shell and is bright; the oxidation resistance and the corrosion resistance of the probe shell are enhanced, the adhesion of carbon-containing substances in tail gas on the surface of the probe shell is effectively reduced, the phenomenon of carbon on the surface area of the probe shell is improved, the response speed of the probe is favorably improved, and the long-term service life of the probe can be prolonged.
In the preferred embodiment, the probe housing includes an ultrasonic cleaning process for removing impurities and contaminants on the surface of the probe housing of the high temperature sensor before the high temperature treatment process is performed. In this embodiment, carry out ultrasonic cleaning process with high temperature sensor's probe casing in advance, can effectively clear away the impurity on probe casing surface such as dust or other pollutants etc. do benefit to follow-up high temperature treatment process effect.
In a preferred embodiment, the temperature in the high-temperature treatment step is 950 ℃. Through high-temperature treatment contrast tests at different temperatures, as shown in table 1, observation and analysis are carried out on an oxide film formed on the surface of a shell of the probe after the test, and by combining with summary of test data in table 1, under the conditions that the oxygen flow is kept at 100ml/min and the oxygen maintaining time is kept at 8h, the surface of the shell of the probe is observed to be oxidized and weighted greatly when the temperature exceeds 900 ℃, so that the rising trend is shown, the efficiency and the cost are comprehensively considered, and 950 ℃ is selected as an economic and efficient temperature point.
TABLE 1
| Temperature (. degree.C.) | Time (h) | Oxygen flow (ml/min) | Combined effect |
| 800 | 8 | 100 | Difference (D) |
| 850 | 8 | 100 | Is poor |
| 900 | 8 | 100 | Good wine |
| 950 | 8 | 100 | Superior food |
| 1000 | 8 | 100 | Superior food |
In the preferred embodiment, in the high-temperature treatment process, the oxygen flow rate is 60ml/min, and the oxygen maintaining time is 6 h. And (2) carrying out high-temperature treatment contrast tests with different oxygen maintaining times under the condition of selecting 950 ℃, as shown in table 2, observing the surface oxidation condition of the shell of the probe and summarizing by combining test data, keeping the oxygen flow at 100ml/min under the condition of 950 ℃, keeping the oxygen maintaining time in a 5-6 h interval, observing that the surface oxidation weight of the shell of the probe is increased greatly when the oxygen flow exceeds 5h, showing an obvious rising trend, comprehensively considering the efficiency and the cost, and selecting 6h as an economic and efficient time point.
TABLE 2
| Temperature (. degree.C.) | Time (h) | Oxygen flow (ml/min) | Combined effect |
| 950 | 4 | 100 | Is poor |
| 950 | 5 | 100 | Good wine |
| 950 | 6 | 100 | Superior food |
| 950 | 7 | 100 | Superior food |
| 950 | 8 | 100 | Superior food |
And under the conditions of selecting 950 ℃ temperature and oxygen maintaining time of 6h, continuing to perform high-temperature treatment contrast tests with different oxygen flow rates, as shown in Table 3, observing the oxidation condition of the surface of the shell of the probe and summarizing by combining test data, wherein under the conditions of 950 ℃ temperature and oxygen maintaining time of 6h, the oxygen flow rate is in a range of 40-60 ml/min, and when the oxidation weight of the surface of the shell of the probe is observed to be larger and show an obvious rising trend, and the efficiency and the cost are comprehensively considered, the oxygen flow rate is selected to be 60 ml/min.
TABLE 3
| Temperature (. degree.C.) | Time (h) | Oxygen flow (ml/min) | Combined effect |
| 950 | 6 | 20 | Good wine |
| 950 | 6 | 40 | Good wine |
| 950 | 6 | 60 | Superior food |
| 950 | 6 | 80 | Superior food |
| 950 | 6 | 100 | Superior food |
In the scheme of the preferred embodiment, in the high-temperature treatment process, the heat preservation time is 5-8 hours, preferably 6 hours, and the time for effectively oxidizing the surface of the probe shell to form the blackening protection layer is ensured. In the high-temperature treatment process, the probe shell is placed in an environment with the temperature of 900-1000 ℃ for heat preservation, the oxygen flow of the environment is maintained to be 40-100 ml/min, the oxygen maintaining time is 5-8 h, namely, oxygen is introduced into the probe shell during heat preservation, and the oxygen maintaining time is 6h, which is the most economical and efficient time point, so that the heat preservation time can be determined to be 5-8 h, and is preferably 6 h.
The high-temperature sensor probe shell processing device for the automobile exhaust comprises a high-temperature furnace, wherein the high-temperature furnace comprises a rectangular outer shell 1, and a furnace chamber 2 is arranged in the rectangular outer shell 1, and is installed and fixed through a support if the furnace chamber is embedded in the rectangular outer shell; the front end face of the rectangular shell is provided with an opening and closing door 11 corresponding to the furnace chamber and used for opening and closing the furnace chamber; a plurality of partition plates 21 are horizontally arranged in the furnace cavity and used for placing a probe shell of a high-temperature sensor; the side wall of the furnace chamber is provided with an air inlet and an air outlet, and the air inlet and the air outlet are respectively connected with an air inlet pipeline 3 and an air outlet pipeline 4; and a disturbance structure is arranged in the furnace chamber and is used for disturbing the air flow in the furnace chamber to circularly flow. The oxygen flow in the furnace chamber of the high-temperature furnace can reach the standard by controlling the speed of introducing oxygen into the air inlet and discharging oxygen from the air outlet. Set up the disturbance structure in the furnace chamber, can disturb the interior air current circulation of furnace chamber and flow, not only can make the oxygen of furnace chamber along with the air current flow misce bene, also can make the universe temperature more even in the furnace chamber, do benefit to the high temperature treatment effect of probe casing.
When the high-temperature furnace is used, the high-temperature furnace is preheated to 950 ℃, the opening and closing door is opened, the probe shell of the high-temperature sensor is flatly laid on the partition plate, the probe shell is not contacted with or covered, the opening and closing door is closed, the oxygen flow in the furnace chamber is ensured to be 40-100 ml/min and maintained for 6 hours by controlling the speed of introducing oxygen into the air inlet and discharging oxygen from the air outlet, after the high-temperature treatment process is finished, the heating is stopped, the opening and closing door is opened, and the probe shell of the high-temperature sensor can be taken out.
In the scheme of the preferred embodiment, the partition plate 21 is uniformly provided with partition holes, and the partition holes are used for vertically placing the probe shell 5 on the partition plate and limiting the probe shell from falling; the partition plate is provided with air guide holes 211 for air flow circulation in the furnace cavity. In this embodiment, for doing benefit to the probe casing more thermally equivalent of furnace chamber, reduce the area of contact between probe casing and the baffle, and prevent that the probe casing from sliding on the baffle, ensure the high temperature treatment effect on the whole surface of probe casing, adopt the baffle evenly to set up the mode in separate hole, the aperture of baffle matches with the probe casing minimum aperture that needs carry out high temperature treatment, during the use, inserts the probe casing from minimum aperture end along separating the hole, and the probe casing can not drop simultaneously. The baffle and the furnace chamber are detachably connected, and if guide grooves in which the baffle can be inserted are formed in two side walls of the furnace chamber, the baffles in different hole diameters can be replaced conveniently when probe shells of different types are processed. In order to facilitate the air flow circulation in the furnace chamber, the partition plate is also provided with air guide holes which are arranged at intervals with the multiple rows of partition holes, so that the air flow can circulate up and down through the air guide holes.
In the scheme of the preferred embodiment, the air inlet pipeline 3 is arranged at the top of the furnace chamber 2, the air inlet pipeline 3 comprises an air inlet main pipe 31 and air inlet branch pipes 32, the air inlet main pipe is connected with an air inlet, the air inlet branch pipes and the air inlet main pipe are arranged in a comb shape, and the intervals of the air inlet branch pipes are equal; the air inlet branch pipes are uniformly provided with air inlet openings facing the bottom of the furnace chamber along the axial direction, and the air inlet openings 33 are distributed in a delta shape by three air inlet holes 331; the adjacent air inlet openings are equal in distance, and the air inlet openings of the adjacent air inlet branch pipes are arranged in a staggered mode. In the embodiment, in order to ensure that the introduced oxygen is uniformly dispersed in the whole furnace chamber, the air inlet branch pipes and the air inlet main pipe are arranged on the top of the furnace chamber, and the air inlet openings are uniformly arranged on the air inlet branch pipes, so that the oxygen is uniformly fed into the furnace chamber from the top of the furnace chamber to the greatest extent; further for the radiation range that increases inlet opening and send out oxygen, reduce the impact of oxygen stream simultaneously, set up inlet opening into the form that is the article font by three inlet port and arranges, do benefit to the even and slower diffusion of oxygen universe in the furnace chamber.
In the scheme of the preferred embodiment, the air outlet pipeline 4 is arranged at the bottom of the furnace chamber 2, the air outlet pipeline 4 comprises an air outlet main pipe 41 and air outlet branch pipes 42, the air outlet main pipe is connected with the air outlet, the air outlet branch pipes and the air outlet main pipe are arranged in a comb shape, and the intervals between the air outlet branch pipes are equal; the air outlet branch pipes are uniformly provided with air outlet openings 43 facing the top of the furnace chamber along the axial direction, and the air outlet openings 43 are distributed in a delta shape by three air outlet holes 431; the distance between the adjacent air outlet openings is equal, and the air outlet openings of the adjacent air outlet branch pipes are arranged in a staggered mode. In the embodiment, in order to ensure that oxygen is uniformly discharged from the furnace chamber and avoid the phenomenon that the flow of local oxygen in the furnace chamber is obviously reduced when the oxygen is discharged, the air outlet branch pipe and the air outlet main pipe are arranged at the bottom of the furnace chamber, and the air outlet branch pipe is uniformly provided with the air outlet opening, so that the oxygen is uniformly sucked into the air outlet pipeline from the position as much as possible at the bottom of the furnace chamber and is discharged; further for increasing the radiation scope of the opening of giving vent to anger inhalation oxygen, reduce the gathering of oxygen stream simultaneously, set up the opening of giving vent to anger to be the form that the article font was arranged by three ventholes, do benefit to oxygen and evenly discharge from the furnace chamber bottom.
In the preferred embodiment, the furnace chamber 2 is provided with a flow-limiting grille 22 above the air outlet pipeline, for reducing the speed and flow rate of the oxygen flow sucked into the air outlet pipeline.
In the preferred embodiment, the perturbation structure comprises an impeller comprising a drive shaft 62 and at least two sets of blades 61; the transmission shaft vertically extends into the furnace cavity from the outside of the top of the rectangular shell, the transmission shaft partially works in the furnace cavity and partially works outside the furnace cavity, a heat insulation pad is arranged at the transmission shaft part which works outside the furnace cavity, the transmission shaft 62 is connected with a motor 63, and the motor is positioned outside the high-temperature furnace; the wind direction formed by the group of blades arranged close to the top of the furnace chamber faces the bottom of the furnace chamber, and the wind direction formed by the group of blades arranged far away from the top of the furnace chamber faces the top of the furnace chamber. In this embodiment, because let in oxygen and discharge oxygen simultaneously in the furnace chamber and control the interior oxygen flow of furnace chamber, for the flow of reinforcing furnace chamber intra-area oxygen, make the interior oxygen misce bene of furnace chamber, guarantee the high temperature treatment effect on sensor probe shell surface, do benefit to the equal effective oxidation of probe shell surface and form the blackened protective layer, through setting up disturbance structure, drive the interior oxygen flow circulation of furnace chamber universe and misce bene. Through setting up two sets of blades, the wind direction that a set of blade that is close to the setting of furnace chamber top formed towards the furnace chamber bottom, and the wind direction that a set of blade that keeps away from the setting of furnace chamber top formed towards the furnace chamber top, and the wind direction that makes two sets of blades form is relative, forms two relative air currents and strikes each other when disturbing oxygen flow to further strengthen the circulation flow of oxygen flow in the universe in the furnace chamber.
In the scheme of the preferred embodiment, at least two groups of the perturbation structures are arranged and respectively close to the left side and the right side of the oven cavity. When four groups of disturbing structures are arranged, the disturbing structures are respectively arranged close to four corners of the furnace cavity.
In the preferred embodiment, the side wall and/or the top wall of the rectangular housing 1 is provided with a vent hole, and the vent hole is correspondingly provided with a sealing cover 12 which can be opened and closed. In this embodiment, after the high temperature furnace stops heating, through opening the sealed lid of ventilation hole department, can increase furnace chamber and surrounding air flow, do benefit to the heat and discharge, avoid thermal accumulation between furnace chamber and the shell, do benefit to the device heat dissipation.
In the scheme of the preferred embodiment, the opening and closing door 11 is provided with a handle 111, so that the operation of an operator is facilitated.
In the scheme of the preferred embodiment, the air inlet pipeline and the air outlet pipeline are respectively provided with an air inlet valve and an air outlet valve which are positioned outside the high-temperature furnace corresponding to the air inlet and the air outlet, so that the oxygen flow and the oxygen speed are conveniently controlled, and the oxygen flow in the furnace chamber of the high-temperature furnace is ensured.
In the description of the embodiments of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "center", "top", "bottom", "inner", "outer", and the like indicate an orientation or positional relationship.
In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "assembled" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the embodiments of the invention, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
In the description of the embodiments of the present invention, it should be understood that "-" and "-" indicate the same range of two numerical values, and the range includes the endpoints. For example, "A-B" means a range greater than or equal to A and less than or equal to B. "A to B" means a range of not less than A and not more than B.
In the description of the embodiments of the present invention, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A method for treating a high-temperature sensor probe shell for automobile exhaust is characterized by comprising the following steps:
the high-temperature treatment process comprises the steps of carrying out high-temperature treatment on a probe shell of the high-temperature sensor, wherein the high-temperature treatment process comprises the steps of placing the probe shell in an environment with the temperature of 900-1000 ℃ for heat preservation, and simultaneously maintaining the flow of ambient oxygen at 40-100 ml/min for 5-8 h;
and a cooling process, namely cooling the probe shell subjected to the high-temperature treatment process.
2. The method for treating the probe shell of the high-temperature sensor for the automobile exhaust according to claim 1, wherein the probe shell comprises an ultrasonic cleaning process for removing impurities and pollutants on the surface of the probe shell of the high-temperature sensor before the high-temperature treatment process is performed.
3. The method for treating the shell of the high-temperature sensor probe for the automobile exhaust according to claim 1, wherein in the high-temperature treatment process, the temperature is selected to be 950 ℃.
4. The method for treating the probe shell of the high-temperature sensor for the automobile exhaust according to claim 1, wherein in the high-temperature treatment process, the oxygen flow is 60ml/min, and the oxygen maintaining time is 6 h.
5. The method for treating the probe shell of the high-temperature sensor for the automobile exhaust according to claim 1, wherein in the high-temperature treatment process, the heat preservation time is 5-8 hours.
6. The high-temperature sensor probe shell processing device for the automobile exhaust is characterized by comprising a high-temperature furnace, wherein the high-temperature furnace comprises a rectangular outer shell, a furnace chamber is arranged in the rectangular outer shell, and an opening and closing door is arranged on the front end surface of the rectangular outer shell corresponding to the furnace chamber; a plurality of partition plates are horizontally arranged in the furnace cavity and used for placing a probe shell of a high-temperature sensor; the side wall of the furnace chamber is provided with an air inlet and an air outlet, and the air inlet and the air outlet are respectively connected with an air inlet pipeline and an air outlet pipeline; and a disturbance structure is arranged in the furnace chamber and is used for disturbing the air flow in the furnace chamber to circularly flow.
7. The device for treating the probe shell of the high-temperature sensor for the automobile exhaust according to claim 5, wherein the partition plate is uniformly provided with partition holes, and the partition holes are used for vertically placing the probe shell on the partition plate and limiting the probe shell from falling; the baffle plate is provided with an air guide hole for air flow circulation in the furnace cavity.
8. The device for processing the probe shell of the high-temperature sensor for the automobile exhaust according to claim 5, wherein the air inlet pipeline is arranged on the top of the furnace chamber and comprises an air inlet main pipe and air inlet branch pipes, the air inlet main pipe is connected with the air inlet, the air inlet branch pipes and the air inlet main pipe are arranged in a comb shape, and the intervals between the air inlet branch pipes are equal; the air inlet branch pipes are uniformly provided with air inlet openings facing the bottom of the furnace chamber along the axial direction, and the air inlet openings are distributed in a delta shape by three air inlet holes; the adjacent air inlet openings are equal in distance, and the air inlet openings of the adjacent air inlet branch pipes are arranged in a staggered mode.
9. The device for processing the probe shell of the high-temperature sensor for the automobile exhaust according to claim 5, wherein the gas outlet pipeline is arranged at the bottom of the furnace chamber and comprises a main gas outlet pipe and a plurality of branch gas outlet pipes, the main gas outlet pipe is connected with the gas outlet, the plurality of branch gas outlet pipes and the main gas outlet pipe are arranged in a comb shape, and the distances between the branch gas outlet pipes are equal; the air outlet branch pipes are uniformly provided with air outlet openings facing the top of the furnace chamber along the axial direction, and the air outlet openings are distributed in a delta shape by three air outlet holes; the distance between the adjacent air outlet openings is equal, and the air outlet openings of the adjacent air outlet branch pipes are arranged in a staggered mode.
10. The device for processing the probe shell of the high-temperature sensor for the automobile exhaust according to claim 5, wherein the disturbance structure comprises an impeller, and the impeller comprises a transmission shaft and at least two groups of blades; the transmission shaft vertically extends into the furnace cavity from the outside of the top of the rectangular shell, the transmission shaft partially works in the furnace cavity and partially works outside the furnace cavity, a heat insulation pad is arranged at the transmission shaft part which works outside the furnace cavity, the transmission shaft is connected with a motor, and the motor is positioned outside the high-temperature furnace; the wind direction formed by the group of blades arranged close to the top of the furnace chamber faces the bottom of the furnace chamber, and the wind direction formed by the group of blades arranged far away from the top of the furnace chamber faces the top of the furnace chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911063749.XA CN110849490A (en) | 2019-11-04 | 2019-11-04 | Treatment method and treatment device for high-temperature sensor probe shell for automobile exhaust |
Applications Claiming Priority (1)
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