阅读说明：本技术 微波法含水率一体测定仪 (Microwave method water content integral tester ) 是由 唐国富 王举东 陈涛 孙明刚 林树丰 刘文杰 曹庆超 马丽芙 郑立君 池波 邢建 于 2019-12-02 设计创作，主要内容包括：本发明提出了微波法含水率一体测定仪,属于含水量测定技术领域,特别是涉及微波法含水率一体测定仪。解决了现有含水率测定方法所需时间长、操作难度大、对测定环境要求高、无法实现平行试验以及测定材料单一的问题。解决了两个腔体同时工作受热不均的问题,解决了称重结构不精确不稳定的问题。它包括第一腔体、第二腔体、数显控屏、打印机、第一上箱体、第二上箱体、下箱体和称重结构,所述第一腔体设置在第一上箱体内,所述第二腔体设置在第二上箱体内,所述第一上箱体和第二上箱体均与下箱体固定连接,所述第一腔体和第二腔体内产生微波。它主要用于对含水率的测定。(The invention provides a microwave-method water content integrated tester, belongs to the technical field of water content measurement, and particularly relates to a microwave-method water content integrated tester. The method solves the problems that the existing method for measuring the water content needs long time, is difficult to operate, has high requirement on measuring environment, can not realize parallel test and has single measuring material. The problem of two cavitys simultaneous working uneven heating is solved, the structure inaccuracy unstable of weighing has been solved. The weighing device comprises a first cavity, a second cavity, a digital display screen, a printer, a first upper box body, a second upper box body, a lower box body and a weighing structure, wherein the first cavity is arranged in the first upper box body, the second cavity is arranged in the second upper box body, the first upper box body and the second upper box body are fixedly connected with the lower box body, and microwaves are generated in the first cavity and the second cavity. It is mainly used for measuring the water content.)

1. Integrative apparatus of microwave method moisture content, its characterized in that: the weighing device comprises a first cavity (1), a second cavity (3), a digital display screen (4), a printer (5), a first upper box body (8), a second upper box body (9), a lower box body (10) and a weighing structure, wherein the first cavity (1) is arranged in the first upper box body (8), the second cavity (3) is arranged in the second upper box body (9), the first upper box body (8) and the second upper box body (9) are fixedly connected with the lower box body (10), the lower box body (10) is provided with the digital display screen (4) and the printer (5), a first power supply (15), a second power supply (16), a first weight measuring module (17), a central controller (18), a second weight measuring module (19), a first sensor support (20) and a second sensor support (21) are arranged inside the digital display screen (4) and the printer (5), the first power supply (15) and the first sensor support (20) are respectively connected with the first weight measuring module (17), second power (16) and second sensor support (21) are equallyd divide and do not link to each other with second weight measurement module (19), first weight measurement module (17) and second weight measurement module (19) are equallyd divide and do not link to each other with central controller (18), central controller (18) link to each other with display screen (4) and printer (5) respectively, first cavity (1) and second cavity (3) are equallyd divide and do not link to each other with first power (15), second power (16) to produce the microwave in the cavity, the structure quantity of weighing is two, and two structures of weighing link to each other with first cavity (1) and second cavity (3) respectively, first sensor support (20) and second sensor support (21) link to each other with two structures of weighing respectively, the structure of weighing includes weighing sensor (22), tray (23) on the sensor, The gravity chassis (24), the supporting rod (25) and the tray (26), wherein two ends of the supporting rod (25) are respectively connected with the gravity chassis (24) and the tray (26), the gravity chassis (24) is located outside the first cavity (1) or the second cavity (3), the tray (26) is located inside the first cavity (1) or the second cavity (3), the gravity chassis (24) is connected with the sensor upper tray (23), the sensor upper tray (23) is connected with the weighing sensor (22), and the weighing sensor (22) is connected with the first sensor support (20) or the second sensor support (21).

2. The microwave-method moisture content integrated tester according to claim 1, characterized in that: first cavity (1) links to each other with first exhaust duct (11), second cavity (3) link to each other with second exhaust duct (13), first exhaust duct (11) link to each other with first fan (12), second exhaust duct (13) link to each other with second fan (14).

3. The microwave-method moisture content integrated tester according to claim 2, characterized in that: and air exhaust nets (2) are arranged on the outer sides of the first fan (12) and the second fan (14).

4. The microwave-method moisture content integrated tester according to claim 2, characterized in that: the first fan (12) and the second fan (14) are both direct current fans, and the power supply voltage is 12V or 24V.

5. The microwave-method moisture content integrated tester according to claim 2, characterized in that: the lower box body (10) is provided with a plurality of switches (6), and the switches (6) respectively control the first fan (12), the second fan (14), the first power supply (15) and the second power supply (16).

6. The microwave-method moisture content integrated tester according to claim 1, characterized in that: the lower box body (10) is provided with a plurality of indicator lamps (7), and the indicator lamps (7) are respectively connected with a central controller (18).

7. The microwave-method moisture content integrated tester according to claim 1, characterized in that: and a flame-retardant plate (27) is arranged between the first cavity (1) and the second cavity (3).

8. The microwave-method moisture content integrated tester according to claim 1, characterized in that: the working frequency of the first cavity (1) and the second cavity (3) is 2450Hz, and the wavelength of the microwave generated in the cavities is 122 mm.

9. The microwave-method moisture content integrated tester according to claim 1, characterized in that: the attraction base plate (24) is magnetic.

10. The microwave-method moisture content integrated tester according to claim 1, characterized in that: weighing sensor (22), first sensor support (20) and second sensor support (21) are the aluminum alloy material, die-pin (25) and tray (26) are non-metallic material.

Technical Field

The invention belongs to the technical field of water content determination, and particularly relates to a microwave-method water content integrated determinator.

Background

At present, three methods are provided for testing the water content of the materials specified in the current JTG E40-2007 Highway Material industry test Specification in China: drying, alcohol combustion and specific gravity. Among them, the drying method is widely used and is regarded as a standard method in the industry.

The drying method is to use an electrothermal oven or other energy ovens capable of keeping 105-110 ℃ at the temperature, the drying time is not less than 8 hours, the viscous material is suitable to be dried for 8-10 hours, and most of the materials are usually dried for 16-24 hours. Because the volume, the weight and the power of the oven are larger, the measuring period is long, the measuring is required to be carried out in a laboratory, and the requirement of rapidness and convenience on site cannot be met. The alcohol combustion method needs three cycles of alcohol combustion and cooling, 1 part of sample needs three times of alcohol combustion, and the time for completing the test is about 30-40 min. Because the adoption of the alcohol combustion method has the defects of complicated operation and strict regulations, the alcohol combustion has great potential safety hazard. The chemical components of the material sample are easy to change in the combustion process, the sample is not uniformly dried, the measurement result is unstable, and the error is large. The hydrometer method is mainly used for carrying out tests on insoluble materials such as gravel, broken stone and the like, the test time is about 30-40 min or more, the tests are carried out indoors, and a water source is needed, so that the method is not commonly used. The existing measuring instrument can only measure the water content of one sample, can not achieve the parallel test precision required by national standard, needs to be corrected when exceeding the parallel difference requirement, and most of measuring materials are only limited to fine aggregate measurement

Disclosure of Invention

The invention provides a microwave-method water content integrated tester for solving the problems in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: an integrated tester for moisture content by microwave method comprises a first cavity, a second cavity, a digital display screen, a printer, a first upper box, a second upper box, a lower box and a weighing structure, wherein the first cavity is arranged in the first upper box, the second cavity is arranged in the second upper box, the first upper box and the second upper box are fixedly connected with the lower box, the lower box is provided with the digital display screen and the printer, a first power supply, a second power supply, a first weight measuring module, a central controller, a second weight measuring module, a first sensor support and a second sensor support are arranged in the lower box, the first power supply and the first sensor support are respectively connected with the first weight measuring module, the second power supply and the second sensor support are respectively connected with the second weight measuring module, the first weight measuring module and the second weight measuring module are respectively connected with the central controller, the central controller is respectively connected with the display screen and the printer, the first cavity and the second cavity are respectively connected with the first power supply and the second power supply, and generates microwaves in the cavity, the number of the weighing structures is two, the two weighing structures are respectively connected with the first cavity and the second cavity, the first sensor bracket and the second sensor bracket are respectively connected with two weighing structures, the weighing structures comprise weighing sensors, sensor upper trays, gravitational chassis, support rods and trays, the two ends of the supporting rod are respectively connected with the attraction chassis and the tray, the attraction chassis is positioned outside the first cavity or the second cavity, the tray is positioned in the first cavity or the second cavity, the gravitation chassis is connected with the upper tray of the sensor, the tray is connected with the weighing sensor on the sensor, and the weighing sensor is connected with the first sensor support or the second sensor support.

Furthermore, the first cavity is connected with the first exhaust duct, the second cavity is connected with the second exhaust duct, the first exhaust duct is connected with the first fan, and the second exhaust duct is connected with the second fan.

Furthermore, the outer sides of the first fan and the second fan are both provided with air exhaust nets.

Furthermore, the first fan and the second fan are both direct current fans, and the power supply voltage is 12V or 24V.

Furthermore, a plurality of switches are arranged on the lower box body and respectively control the first fan, the second fan, the first power supply and the second power supply.

Furthermore, a plurality of indicator lamps are arranged on the lower box body and are respectively connected with the central controller.

Furthermore, a flame-retardant plate is arranged between the first cavity and the second cavity.

Furthermore, the working frequency of the first cavity and the second cavity is 2450Hz, and the wavelength of the microwave generated in the cavity is 122 mm.

Further, the attraction base plate is magnetic.

Furthermore, weighing sensor, first sensor support and second sensor support are the aluminum alloy material, die-pin and tray are non-metallic material.

Compared with the prior art, the invention has the beneficial effects that: the invention solves the problems that the existing method for measuring the water content needs long time, has high operation difficulty, high requirement on measuring environment, can not realize parallel test and has single measuring material. The problem of two cavitys simultaneous working uneven heating is solved, the structure inaccuracy unstable of weighing has been solved.

The invention has the following advantages:

1. compared with the existing drying method, the method can measure the water content of the sample within 10-15 minutes, the time efficiency is improved by 50-60 times, the data result is consistent with that of an 8-hour-standard drying method, the method meets the requirement of national standard parallelism difference, does not need to be corrected, can be operated indoors and outdoors, and is safe, convenient and fast, and integrated in automation.

2. Compared with an alcohol combustion method, the method can measure the water content of the sample within 10-15 minutes, the data result is about 5-10 times higher than the precision of the alcohol combustion method, the time efficiency is improved by 2 times, the method can be operated indoors and outdoors, and the method is safe, convenient and fast and is integrated and automatic.

3. The sample species relate to non-organic matter fine aggregates, coarse aggregates, as compared to the pycnometry. Can be operated indoors and outdoors, is safe, convenient and fast, and has integrated automation.

4. The two independent cavities run together and are tested together, two samples can be tested in parallel and rapidly, the function size and time can be selected according to the type of materials, the setting can be carried out through the digital display control screen, the synchronous output result is transmitted to the central controller, the average value is calculated and the thermal parameter is corrected, the parallel test is realized, the data meet the requirement that the international parallel difference is not more than 1%, and the data accuracy is high.

5. The dehumidifying and air-exhausting structure is redesigned, so that the two independent working cavities independently radiate heat, dehumidify and exhaust air, and the integrated connection and rapid operation of the air-exhausting and dehumidifying, printing system, weighing structure and the like are realized.

6. The tester is portable and movable, and realizes field detection and field detection result.

Drawings

FIG. 1 is a schematic view of the structure of the moisture content integrated measuring instrument by microwave method according to the present invention;

FIG. 2 is a schematic view of a top-down structure of the microwave-based moisture content integrated analyzer according to the present invention;

FIG. 3 is a left side view schematic diagram of the moisture content integrated tester by microwave method according to the present invention;

FIG. 4 is a schematic diagram of the right view structure of the microwave-based moisture content integrated analyzer;

FIG. 5 is a schematic view of the rear view structure of the microwave-based moisture content integrated analyzer according to the present invention;

FIG. 6 is a schematic cross-sectional view A-A of FIG. 1 according to the present invention;

fig. 7 is a schematic view of a connection structure of the weighing structure according to the present invention.

1-a first cavity, 2-an exhaust net, 3-a second cavity, 4-a digital display screen, 5-a printer, 6-a switch, 7-an indicator light, 8-a first upper box, 9-a second upper box, 10-a lower box, 11-a first exhaust duct, 12-a first fan, 13-a second exhaust duct, 14-a second fan, 15-a first power supply, 16-a second power supply, 17-a first weight measurement module, 18-a central controller, 19-a second weight measurement module, 20-a first sensor bracket, 21-a second sensor bracket, 22-a weighing sensor, 23-a sensor upper tray, 24-an attraction chassis, 25-a supporting rod, 26-a tray and 27-a flame retardant plate.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely explained below with reference to the drawings in the embodiments of the present invention.

Referring to fig. 1-7 to illustrate the present embodiment, the microwave-based moisture content integrated measuring instrument includes a first cavity 1, a second cavity 3, a digital display control screen 4, a printer 5, a first upper box 8, a second upper box 9, a lower box 10 and a weighing structure, wherein the first cavity 1 is disposed in the first upper box 8, the second cavity 3 is disposed in the second upper box 9, the first upper box 8 and the second upper box 9 are both fixedly connected to the lower box 10, the lower box 10 is disposed with the digital display control screen 4 and the printer 5, a first power supply 15, a second power supply 16, a first weight measuring module 17, a central controller 18, a second weight measuring module 19, a first sensor support 20 and a second sensor support 21 are disposed inside the lower box 10, the first power supply 15 and the first sensor support 20 are both connected to the first weight measuring module 17, the second power supply 16 and the second sensor support 21 are both connected to the second weight measuring module 19, the first weight measuring module 17 and the second weight measuring module 19 are respectively connected with a central controller 18, the central controller 18 is respectively connected with a display screen 4 and a printer 5, the first cavity 1 and the second cavity 3 are respectively connected with a first power supply 15 and a second power supply 16, microwaves are generated in the cavities, the number of the weighing structures is two, the two weighing structures are respectively connected with the first cavity 1 and the second cavity 3, the first sensor support 20 and the second sensor support 21 are respectively connected with the two weighing structures, each weighing structure comprises a weighing sensor 22, an upper sensor tray 23, an attraction chassis 24, a support rod 25 and a tray 26, two ends of the support rod 25 are respectively connected with the attraction chassis 24 and the tray 26, the attraction chassis 24 is positioned outside the first cavity 1 or the second cavity 3, the tray 26 is positioned inside the first cavity 1 or the second cavity 3, the gravity chassis 24 is connected with the sensor upper tray 23, the sensor upper tray 23 is connected with the load cell 22, and the load cell 22 is connected with the first sensor support 20 or the second sensor support 21.

In this embodiment, the sample to be tested is placed on the tray 26, the power supply box magnetrons in the first cavity 1 and the second cavity 3 provide about 4000 v high voltage, and the magnetrons continuously generate microwaves under the excitation of the power supply and are coupled into the cavities through the waveguide system. When the microwave is absorbed by water molecules in the sample material, the water molecules will oscillate at tens of millions of times per minute, thereby generating a heat effect, and the water will evaporate a little along with the temperature rise. The high-precision weighing sensor 22 is sequentially connected with the sensor upper tray 23, the magnetic attraction chassis 24, the high-temperature-resistant supporting rod 25 and the tray 26, the weighing sensor 22 transmits millivolt signals to the first weight measuring module 17 and the second weight measuring module 19 through the first sensor support 20 or the second sensor support 21, the first sensor support 20 and the second sensor support 21 respectively, and the first weight measuring module 17 and the second weight measuring module 19 transmit data to the central controller 18 in the form of electric signals for data processing. The central controller 18 records the weight of the wet material before heating and the weight of the dry material after heating, and then calculates the ratio of the water content of the sample, i.e., (wet material-dry material)/dry material × 100%. The central controller 18 transmits the calculation result to the digital display control screen 4 to display the result, and transmits the result to the printer 5 to print the calculation result.

The microwave has the characteristics of heating, reflection, transmission and linear propagation, the moisture content of the sample is measured by drying and heating the sample by utilizing the working principle of the microwave, the working frequency of the first cavity 1 and the second cavity 3 is 2450Hz, the wavelength of the microwave generated in the cavities is 122mm, and after the microwave is absorbed by water molecules, the water molecules vibrate at the frequency of tens of millions of times per minute, so that the heat effect is generated, and the moisture can be evaporated a little along with the temperature rise. Has the functions of drying, dehydrating, drying and the like. The weighing data are respectively transmitted to the central controller 18 by the weighing dowel steel 22 to realize the equal test, data sharing and calculation of two cavities, and the weighing data are stored and printed after parameter correction, thereby achieving the purpose of quick and accurate measurement. The running time, the maximum measuring range of the sample, the microwave power, the stabilization time, the correction system and the electronic scale precision check can be set through the digital display control screen 4. The weight of the wet material, the weight of the dry material, the water content, the running time and the date are displayed through a printer 5. Weighing sensor 22, first sensor support 20 and second sensor support 21 are the aluminum alloy material, die-pin 25 and tray 26 are high temperature resistant non-metallic material, the structure of weighing is system structures such as weighing, programming, integration, long-range.

The first cavity 1 and the second cavity 3 run together and are tested together, so that parallel integrated measurement is realized, and the parallelism and precision meet the national standard requirements. First cavity 1 links to each other with first exhaust duct 11, second cavity 3 links to each other with second exhaust duct 13, first exhaust duct 11 links to each other with first fan 12, second exhaust duct 13 links to each other with second fan 14, first fan 12 and the second fan 14 outside all are provided with exhaust net 2, first fan 12 and second fan 14 are direct current fan, and supply voltage is 12V or 24V, realizes that first cavity 1 and second cavity 3 dispel the heat alone, the hydrofuge is aired exhaust. The lower box body 10 is provided with a plurality of switches 6, and the switches 6 respectively control the first fan 12, the second fan 14, the first power supply 15 and the second power supply 16, so that the independent control of cavity operation and air exhaust is realized. The lower box body 10 is provided with a plurality of indicator lamps 7, the indicator lamps 7 are respectively connected with the central controller 18, and the indicator lamps 7 are used for indicating the running state, the end of the measurement time, the end of temperature supplement and the end of measurement of the measuring instrument. And a flame-retardant plate 27 is arranged between the first cavity 1 and the second cavity 3, so that the interference between the two cavities is avoided.

All be provided with the microwave transmitting unit in first cavity 1 and the second cavity 3 and produce the microwave through the microwave transmitting unit, the microwave transmitting unit includes the magnetron, high voltage transformer, control circuit and power, each part links to each other in proper order, weighing sensor 22 is 1kg high accuracy weighing sensor, sensitivity is 1mv/v, first weight measurement module 17 and second weight measurement module 19 are 24 bits AD signal conversion modules, digital display screen 4 is 10 cun touch-sensitive screens, printer 5 is the thermal printer, switch 6 is two grades of switches, pilot lamp 7 is DC24v pilot lamps, first power 15 and second power 16 are 3 way voltage switch power.

The microwave-method water content integral tester provided by the invention is described in detail, a specific example is applied in the text to explain the principle and the implementation mode of the invention, and the description of the example is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.