CN217111920U - Highway engineering stoving degree test device that gathers materials - Google Patents
Highway engineering stoving degree test device that gathers materials Download PDFInfo
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- CN217111920U CN217111920U CN202220872841.1U CN202220872841U CN217111920U CN 217111920 U CN217111920 U CN 217111920U CN 202220872841 U CN202220872841 U CN 202220872841U CN 217111920 U CN217111920 U CN 217111920U
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Abstract
The utility model discloses a highway engineering stoving degree test device that gathers materials, including oven box and microcontroller, the position that one side of oven box is close to the bottom has seted up the air intake, the top of oven box has seted up the air outlet, the top of oven box is provided with axial fan, air outlet department is provided with the humidity transducer that is used for detecting exhaust air humidity, be provided with the heater strip on the inside wall of oven box, be provided with the loading board that gathers materials in the oven box, the loading board up end that gathers materials is provided with the resistance strain formula weighing sensor that is used for detecting the weight that gathers materials; the microcontroller is respectively and electrically connected with the resistance strain type weighing sensor, the humidity sensor, the axial flow fan and the heating wires; the microcontroller is used for controlling the working states of the axial flow fan and the heating wires according to the aggregate weight detected by the resistance strain type weighing sensor and the air humidity detected by the humidity sensor. The utility model provides a current oven gather materials the stoving time uncertain to the different grade type, the stoving standard is difficult to unified problem.
Description
Technical Field
The utility model belongs to the technical field of highway engineering stoving that gathers materials, concretely relates to highway engineering stoving degree test device that gathers materials.
Background
Some tests of highway engineering aggregates require that the aggregate be washed first to reduce the effect of fines and impurities on its structural performance and the results of subsequent screening tests. After the aggregate is cleaned, the aggregate is dried in an oven to constant weight, the drying time of the standard and specified aggregates of different types is different, and is different from 4 to 6 hours, 8 to 12 hours and 24 hours, and the uncertainty of the drying time easily causes the waste of test time and resources.
The judgment mode for drying aggregate to constant weight in the existing standard is as follows: weighing twice at intervals of more than 3h, wherein the weight difference between the dried aggregate and the dried aggregate is less than 0.1 percent of the total mass of the aggregate, and the aggregate is considered to reach constant weight. According to the evaluation method, after different aggregates approximately reach the drying time, an operator uses high-temperature-resistant gloves to take out the high-temperature aggregate tray at the temperature of about 100 ℃ for a plurality of times at intervals of 3 hours, reweighs the aggregate tray, and then manually calculates whether the mass difference percentage of the aggregates weighed for the last two times is less than 0.1% of the total mass of the aggregates. The whole process requires that an operator takes out and puts back aggregate for multiple times in a high-temperature environment, the risk of scalding caused by high temperature due to misoperation can be met, and the time of a subsequent screening test can be delayed due to repeated weighing. In addition, if the drying time of the aggregate is too short to reach the standard, the internal moisture of the aggregate can influence the subsequent test; if the heating time of the aggregate is too long, the firmness and the surface characteristics of the aggregate are damaged, and the accuracy of the test is influenced.
Disclosure of Invention
To the problem that exists among the prior art, the utility model provides a highway engineering stoving degree test device that gathers materials, the stoving degree that gathers materials is synthesized to the data that gathers materials through weighing sensor and high temperature type humidity transducer, has solved that current oven is uncertain to the stoving time that the different grade type gathers materials, and the stoving standard is difficult to unified problem.
In order to solve the technical problem, the utility model discloses a following technical scheme realizes:
the utility model provides a highway engineering stoving degree test device that gathers materials, includes oven box and microcontroller, the air intake has been seted up to the position that one side of oven box is close to the bottom, the air outlet has been seted up at the top of oven box, the top of oven box is provided with and is used for following the air intake inhales and follows air outlet exhaust axial fan, air outlet department is provided with the humidity transducer who is used for detecting exhaust air humidity, be provided with the heater strip on the inside wall of oven box, be provided with the loading board that gathers materials in the oven, the loading board up end that gathers materials is provided with the resistance strain formula weighing sensor who is used for detecting the weight that gathers materials.
Further, microcontroller is used for according to the aggregate weight that resistance strain formula weighing sensor detected with the air humidity that humidity transducer detected, control axial fan with the operating condition of heater strip specifically includes:
when the aggregate weight detected by the resistance strain type weighing sensor is equal to a preset weight threshold value and the air humidity detected by the humidity sensor is equal to a preset humidity threshold value, controlling the axial flow fan and the heating wire to continuously work for a preset time and then stopping working; the preset humidity threshold value is the air humidity detected by the humidity sensor when aggregates to be dried are not placed on the aggregate bearing plate.
Further, the preset time duration is 3 h.
Furthermore, a high-temperature-resistant covering layer covering the resistance strain type weighing sensor is arranged on the aggregate bearing plate.
Further, a control console is arranged on the outer side wall of the oven body, and the microcontroller is installed on the control console.
Further, still be provided with the display on the control cabinet, the display with the microcontroller electricity is connected, microcontroller still be used for with the weight of gathering materials that resistance strain gauge weighing sensor detected with the air humidity that humidity transducer detected draws into weight curve and humidity curve, and passes through the display shows.
Further, still be provided with the memory on the control cabinet, the memory with the microcontroller electricity is connected, the memory is used for the storage the aggregate weight that resistance strain gauge weighing sensor detected with the air humidity data that humidity transducer detected.
Further, still be provided with the alarm on the control cabinet, the alarm with the microcontroller electricity is connected, microcontroller still is used for the basis the weight of gathering materials that resistance strain formula weighing sensor detected with the air humidity that humidity transducer detected, control the alarm is reported to the police.
Further, a heat insulation layer is clamped between the outer wall and the inner wall of the oven body.
Compared with the prior art, the utility model discloses following beneficial effect has at least:
the utility model provides a pair of highway engineering stoving degree test device that gathers materials, the oven that utilizes inside constancy of temperature will gather materials surface and inside water evaporation for vapor at the stoving in-process, and along with inside hot-air together from air outlet exhaust principle, a change with the weight of gathering materials and the change of the inside air humidity of oven come the test device of the stoving degree of evaluating that gathers materials, its aim at comes the comprehensive evaluation highway stoving degree of gathering materials through the data that weighing sensor and high temperature type humidity transducer gathered, and it is uncertain to have solved the stoving time that current oven gathers materials to the different grade type, the stoving standard is difficult to unified problem. Specifically, when the aggregate weight detected by the resistance strain type weighing sensor is equal to a preset weight threshold value and the air humidity detected by the humidity sensor is equal to a preset humidity threshold value, the axial flow fan and the heating wire are controlled to continuously work for a preset time and then stop working, wherein the preset humidity threshold value is the air humidity detected by the humidity sensor when aggregates to be dried are not placed on the aggregate bearing plate. The utility model discloses labour saving and time saving can reduce the risk that the operator was scalded by high temperature because of misoperation, and detects the precision accuracy.
Furthermore, the preset time is 3 hours, and the design requirement of aggregate drying in highway engineering is met.
Further, be provided with the high temperature resistant overburden with resistance strain gauge weighing sensor cladding on the loading board that gathers materials, utilize high temperature resistant overburden to protect resistance strain gauge weighing sensor, prevent the problem that leads to resistance strain gauge weighing sensor to damage because of high temperature.
Further, a control console is arranged on the outer side wall of the oven body, and the microcontroller is installed on the control console, so that the regularity of the device is improved, and the operation of an operator is facilitated.
Furthermore, a display is further arranged on the control console, the microcontroller draws the aggregate weight detected by the resistance strain type weighing sensor and the air humidity detected by the humidity sensor into a weight curve and a humidity curve, and the weight curve and the humidity curve are displayed by the display, so that a visual test change result can be provided for a tester.
Furthermore, a storage device is further arranged on the control console, and the storage device stores the aggregate weight detected by the resistance strain type weighing sensor and the air humidity data detected by the humidity sensor, so that the research and the utilization of subsequent tests are facilitated.
Furthermore, an alarm is further arranged on the control console, and the microcontroller controls the alarm to give an alarm according to the aggregate weight detected by the resistance strain type weighing sensor and the air humidity detected by the humidity sensor, so that the tester can be reminded of completing the test conveniently.
Furthermore, a heat insulation layer is arranged between the outer wall and the inner wall of the oven body, so that the temperature in the oven is prevented from dissipating.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is an overall structure diagram of the road engineering aggregate drying degree testing device of the utility model;
FIG. 2 is a front view of the drying degree testing device for road engineering aggregate of the utility model;
FIG. 3 is a side view of the apparatus for testing the drying degree of aggregate in road engineering of the present invention;
FIG. 4 is a top view of the drying degree testing device for road engineering aggregate of the present invention;
FIG. 5 is a data transmission diagram of the road engineering aggregate drying degree testing device of the utility model;
fig. 6 is a graph showing the change of gravity and humidity in the example.
In the figure: 1-oven box body; 2-aggregate bearing plate; 3-a microcontroller; 4-air inlet; 5, air outlet; 6-axial flow fan; 7-heating wires; 8-resistance strain gauge weighing sensor; 9-a humidity sensor; 10-high temperature resistant covering layer; 11-a console; 12-a display; 13-a memory; 14-an alarm; 15-a heat insulation layer; 16-high temperature resistant glue line.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As a specific embodiment of the present invention, as shown in fig. 1 to 5, a road engineering aggregate drying degree testing device, including oven box 1 and microcontroller 3, the adjustable temperature range of the oven is 10 ℃ -200 ℃ higher than room temperature, a thermal insulation layer 15 is sandwiched between the outer wall and the inner wall of oven box 1, the thermal insulation layer 15 prevents the temperature loss in the oven, preferably, the thermal insulation layer 15 adopts an aluminum silicate fiber thermal insulation layer. An air inlet 4 is formed in a position, close to the bottom, of one side of the oven body 1, an air outlet 5 is formed in the top of the oven body 1, an axial flow fan 6 used for sucking air from the air inlet 4 and discharging the air from the air outlet 5 is arranged at the top of the oven body 1, namely, external air is sucked from the air inlet 4 through the axial flow fan 6 and is discharged from the air outlet 5 after the air is circulated in the oven body 1. A humidity sensor 9 for detecting the humidity of the discharged air is disposed at the air outlet 5, and preferably, a plurality of humidity sensors 9 are uniformly installed at the air outlet 5, in this embodiment, the model of the humidity sensor 9 is JCJ 200W. Heating wires 7 are arranged on the inner side wall of the oven box body 1, the highway engineering aggregate is dried through the heating wires 7, and preferably, the heating wires 7 are uniformly distributed on two inner side walls of the oven box body 1. Be provided with the loading board 2 that gathers materials in oven box 1, 2 up end of loading board that gathers materials is provided with the resistance strain formula weighing sensor 8 that is used for detecting the weight that gathers materials, weight change to the heating process that gathers materials through resistance strain formula weighing sensor 8 detects, it is preferred, be provided with on the loading board 2 that gathers materials with the high temperature resistant overburden 10 of resistance strain formula weighing sensor 8 cladding, protect resistance strain formula weighing sensor 8 through high temperature resistant overburden 10, prevent high temperature damage, guarantee the normal use of the inside metal resistance strain wire of sensor under high temperature environment, regularly gather the total weight data of the charging tray that gathers materials and gather materials. In the embodiment, the model of the resistance strain type weighing sensor 8 is NOS-F306AG, and the measurement precision can reach 0.01 g.
The microcontroller 3 is respectively and electrically connected with the resistance strain type weighing sensor 8, the humidity sensor 9, the axial flow fan 6 and the heating wire 7 through a high temperature resistant glue line 16. Microcontroller 3 is used for according to the weight of gathering materials that resistance strain formula weighing sensor 8 detected and the air humidity that humidity transducer 9 detected, the operating condition of control axial fan 6 and heater strip 7, specifically speaking, when the weight of gathering materials that resistance strain formula weighing sensor 8 detected equals to predetermine the weight threshold value, and when the air humidity that humidity transducer 9 detected was equal to predetermine the humidity threshold value, control axial fan 6 and heater strip 7 and continue to work and stop work after predetermineeing the time length, wherein, predetermine the humidity threshold value for when not placing on the loading board 2 that gathers materials of waiting to dry, the air humidity that humidity transducer 9 detected. Preferably, the preset time period is 3 h.
As the preferred embodiment of the present invention, the outer sidewall of the oven body 1 is provided with a console 11, and the microcontroller 3 is installed on the console 11. More preferably, a display 12 is further disposed on the console 11, the display 12 is electrically connected to the microcontroller 3, the microcontroller 3 is further configured to plot the aggregate weight detected by the resistance strain type weighing sensor 8 and the air humidity detected by the humidity sensor 9 into a weight curve and a humidity curve, and display the weight curve and the humidity curve through the display 12, that is, as shown in fig. 6, a dual-coordinate graph of changes in weight and humidity is displayed on the display 12 in real time, and an operator can determine a current drying stage through the graph and predict a rough drying time, thereby realizing data visualization of the aggregate weight and the air humidity in the drying process.
The control console 11 is also provided with a memory 13, the memory 13 is electrically connected with the microcontroller 3, and the memory 13 is used for storing the aggregate weight detected by the resistance strain type weighing sensor 8 and the air humidity data detected by the humidity sensor 9. An alarm 14 is further arranged on the control console 11, the alarm 14 is electrically connected with the microcontroller 3, and the microcontroller 3 is further used for controlling the alarm 14 to give an alarm according to the aggregate weight detected by the resistance strain type weighing sensor 8 and the air humidity detected by the humidity sensor 9.
Specifically, in order to visually measure the air humidity change condition in the oven in the drying process and consider the internal air circulation flow mode, three humidity sensor mounting cavities are distributed at the lower end of an air outlet of the oven by using a fixing module. Three high temperature type humidity transducer probes 9 are respectively arranged on the inner side of the cavity, so that the probes are fully contacted with air in the channel of the air outlet 5, and air humidity of three different points of the inner wall of the air outlet is collected, and the average value of the air humidity is taken as single data to be transmitted. The humidity sensor 9 is a high-temperature type humidity-sensitive resistance sensor, the working temperature of the humidity-sensitive resistance sensor is-70-180 ℃, the measurement precision can reach +/-2% RH, and the data acquisition work of the air humidity can be carried out in a high-temperature environment.
The working principle and the using method of the utility model are explained below by taking 3000g of fine aggregate to be dried as an example:
and S1, turning on a power switch of the oven, adjusting the temperature in the oven to 105 ℃ and preheating, wherein the output data of the resistance strain type weighing sensor 8 is 0, and the preheating is considered to be completed when the output data of the humidity sensor 9 is stabilized at 2.50% and kept unchanged for half an hour.
S2, adding 3000g of cleaned fine aggregate into an aggregate tray with a net weight of 500g, and putting the aggregate tray on the aggregate bearing plate 2 in the oven for heating.
S3, keeping the temperature in the oven at 105 ℃, continuously heating by the heating wire 7, continuously feeding air from the air inlet 4, circularly flowing along the box wall, taking away the water vapor overflowing from the aggregate surface and the interior by flowing above the material tray, and accelerating the air in the hybrid oven to flow out from the air outlet 5 by the driving of the axial flow fan 6.
S4, the resistance strain type weighing sensor 8 arranged below the material tray measures the total weight of the material tray and the aggregate once every half an hour, the three high-temperature type humidity sensor probes 9 arranged at different positions of the inner wall of the air outlet 5 respectively acquire data of the ambient air humidity once every half an hour, the data acquired by the two types of sensors are transmitted by the microcontroller 3 to be displayed on the display 12, and a gravity and humidity change diagram as shown in fig. 6 is automatically generated.
S5, as can be known from a continuously changing curve chart, compared with the initial state, the weight of the aggregate acquired by the resistance strain type weighing sensor 8 is gradually reduced, the reduction speed is gradually reduced, the net weight of the aggregate is reduced to the lowest point at a certain time, and the aggregate is kept stable within 3h later (the red part of the curve); the average value of the air humidity collected by the three-point humidity sensor 9 firstly rises remarkably, then fluctuates and gradually falls, gradually falls to 2.5% at a certain time and keeps unchanged within 3h later, and the average value is consistent with the air humidity in the initial oven.
And S6, immediately controlling the power supply to be cut off by the microcontroller 3, and stopping the operation of the oven. And recording the final aggregate weight data shown by the display screen, opening the oven after the material tray stands for several minutes, taking out the material tray, and finishing aggregate drying.
The utility model has the advantages as follows:
1. the operation is simple. The traditional drying method that gathers materials needs manual work to set up the stoving time to take out the charging tray repeatedly and weigh, calculate the front and back error, and the device starts can gather the weight that once gathers materials through weighing sensor at half an hour at every interval after preheating, and labour saving and time saving reduces the risk that the operator is scalded by high temperature because of misoperation.
2. High precision. After the aggregate is dried by using the traditional method, the aggregate needs to be taken out for many times and weighed by using a balance, so that the result is rough and the accuracy is poor. The device measures the weight change of the aggregate and the average value of the air humidity of three point positions near an air outlet at regular time by arranging a weighing sensor with the measurement precision reaching 0.01g and a high-temperature type humidity sensor with the measurement accuracy reaching +/-2% RH, and judges the drying degree of the aggregate more accurately by the auxiliary evaluation of the latter.
3. And (6) visualization. The traditional drying method cannot trace the process of aggregate drying, the device can automatically acquire the aggregate weight and the air humidity in the oven at regular time, convert and transmit data to the display screen, and display the data to the whole drying process of an operator in the form of a double-coordinate curve graph.
4. And (4) automation. Traditional oven needs the operator to judge by oneself the stoving process of gathering materials and manual cut-off power, can cause the waste of the energy, and the device can be through connection director automatic cutout power, makes the oven remain unchanged at the data of weighing sensor output, and the data of high temperature type humidity transducer is close to the automatic stop work after three hours of initial environment, in time cools down and the energy can be saved for gathering materials.
5. Continuity. In order to save more time for facilitating the dried aggregate to be used for subsequent screening and other tests, the device can collect data periodically and continuously display the change process of the aggregate weight and the air humidity by outputting a curve chart on a display screen, and an operator is helped to predict the approximate drying time in advance through the curve change trend and prepare the drying time.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still modify or easily conceive of changes in the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A road engineering aggregate drying degree test device is characterized by comprising an oven body (1) and a microcontroller (3), an air inlet (4) is arranged at a position close to the bottom of one side of the oven body (1), an air outlet (5) is formed in the top of the oven body (1), an axial flow fan (6) used for sucking air from the air inlet (4) and discharging air from the air outlet (5) is arranged on the top of the oven body (1), a humidity sensor (9) for detecting the humidity of the discharged air is arranged at the air outlet (5), the inner side wall of the oven body (1) is provided with a heating wire (7), the oven body (1) is internally provided with a material collecting bearing plate (2), a resistance strain type weighing sensor (8) for detecting the weight of the aggregate is arranged on the upper end surface of the aggregate bearing plate (2); microcontroller (3) respectively with resistance strain formula weighing sensor (8), humidity transducer (9) axial fan (6) with heater strip (7) electricity is connected.
2. The device for testing the drying degree of the aggregate in the road engineering according to claim 1, wherein the microcontroller (3) is configured to control the working states of the axial flow fan (6) and the heating wire (7) according to the aggregate weight detected by the resistance strain type weighing sensor (8) and the air humidity detected by the humidity sensor (9), and specifically comprises:
when the aggregate weight detected by the resistance strain type weighing sensor (8) is equal to a preset weight threshold value and the air humidity detected by the humidity sensor (9) is equal to a preset humidity threshold value, controlling the axial flow fan (6) and the heating wire (7) to continuously work for a preset time and then stopping working; the preset humidity threshold value is the air humidity detected by the humidity sensor (9) when aggregates to be dried are not placed on the aggregate bearing plate (2).
3. The device for testing the drying degree of the road engineering aggregate according to claim 2, wherein the preset time is 3 h.
4. The drying degree test device for the road engineering aggregate according to claim 1, characterized in that a high temperature resistant covering layer (10) covering the resistance strain type weighing sensor (8) is arranged on the aggregate bearing plate (2).
5. The road engineering aggregate drying degree test device according to claim 1, wherein a console (11) is arranged on the outer side wall of the oven body (1), and the microcontroller (3) is installed on the console (11).
6. A road engineering aggregate drying degree test device according to claim 5, characterized in that a display (12) is further arranged on the console (11), the display (12) is electrically connected with the microcontroller (3), the microcontroller (3) is further used for plotting the aggregate weight detected by the resistance strain type weighing sensor (8) and the air humidity detected by the humidity sensor (9) into a weight curve and a humidity curve, and displaying the weight curve and the humidity curve through the display (12).
7. A road engineering aggregate drying degree test device according to claim 5, characterized in that a memory (13) is further arranged on the console (11), the memory (13) is electrically connected with the microcontroller (3), and the memory (13) is used for storing aggregate weight detected by the resistance strain type weighing sensor (8) and air humidity data detected by the humidity sensor (9).
8. A road engineering aggregate drying degree test device according to claim 5, characterized in that, still be provided with alarm (14) on control cabinet (11), alarm (14) with microcontroller (3) electricity is connected, microcontroller (3) still is used for according to the aggregate weight that resistance strain type weighing sensor (8) detected and the air humidity that humidity transducer (9) detected, control alarm (14) report to the police.
9. The device for testing the drying degree of the aggregate in the highway engineering according to claim 1, wherein a heat insulation layer (15) is clamped between the outer wall and the inner wall of the oven body (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220872841.1U CN217111920U (en) | 2022-04-15 | 2022-04-15 | Highway engineering stoving degree test device that gathers materials |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220872841.1U CN217111920U (en) | 2022-04-15 | 2022-04-15 | Highway engineering stoving degree test device that gathers materials |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116428827A (en) * | 2023-04-18 | 2023-07-14 | 衢州顺通建材科技有限公司 | Environment-friendly asphalt concrete efficient drying equipment and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116428827A (en) * | 2023-04-18 | 2023-07-14 | 衢州顺通建材科技有限公司 | Environment-friendly asphalt concrete efficient drying equipment and method |
| CN116428827B (en) * | 2023-04-18 | 2023-10-10 | 衢州顺通建材科技有限公司 | Environment-friendly asphalt concrete efficient drying equipment and method |
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