CN106644558B - Pneumatic solid asphalt sampling device - Google Patents
Pneumatic solid asphalt sampling device Download PDFInfo
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- CN106644558B CN106644558B CN201710124793.1A CN201710124793A CN106644558B CN 106644558 B CN106644558 B CN 106644558B CN 201710124793 A CN201710124793 A CN 201710124793A CN 106644558 B CN106644558 B CN 106644558B
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- asphalt
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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Abstract
The invention discloses a pneumatic solid asphalt sampling device, which comprises an asphalt sampling device, a motor for providing rotation of the asphalt sampling device, and a handrail for providing the asphalt sampling device; wherein pitch sampling device is provided with heating device including the bottom for open-ended pitch sampling bucket on the pitch sampling bucket, pitch sampling bucket top and atmospheric pressure control room intercommunication, and the atmospheric pressure control room passes through the arm and is connected with the motor. The problems of sample aging, environmental pollution and the like in the process of sampling the asphalt are avoided, and the problems of low efficiency and insufficient safety of the technology for taking the asphalt in a laboratory are overcome; the device simple structure, reasonable in design can take out the pitch sample from pitch storage barrel fast.
Description
Technical Field
The invention belongs to the technical field of road engineering experiments, relates to the technical field of design and manufacture of road engineering laboratory instruments, and particularly relates to a pneumatic solid asphalt sampling device.
Background
In the 90 s of the last century, along with the continuous high-speed development of Chinese economy, expressway construction industry also advances at a high speed, and at the end of 2014, the total mileage of expressways in China reaches 11.19 ten thousand kilometers, and the asphalt pavement is superior to the first in the world in the United states, and accounts for more than 90% of the proportion of expressways and primary highway pavement built in China by virtue of excellent service performance and travelling comfort.
Asphalt materials are black brown complex mixtures composed of high molecular weight hydrocarbons and nonmetallic derivatives thereof, the surfaces of which are black, and solid, semisolid or liquid organic cementing materials which are insoluble in water and almost soluble in carbon disulfide and carbon tetrachloride. As a high molecular amorphous thermoplastic substance, asphalt gradually softens from a solid or semi-solid state to increase fluidity even flowing like a liquid when the temperature increases, and liquid asphalt gradually solidifies from a viscous state to a semi-solid or solid state when the temperature decreases, and even hardens and becomes brittle when the temperature is lower than a certain level.
In the laboratory, we often need to take asphalt samples for various road engineering laboratory tests. However, in normal and low temperature weather conditions, asphalt is mostly solid and the volume of the asphalt storage tank is large, so that it is difficult to quickly take out the asphalt sample from the asphalt storage tank without heating. The existing laboratory asphalt taking method is usually to heat by open flame to liquefy and flow the asphalt or to flow out after the asphalt becomes soft after being placed for a long time under the condition of high temperature. However, in the state of high-temperature heating, part of high-molecular compounds in the asphalt volatilize and generate toxic and irritant black smog, and the toxic and irritant black smog is directly discharged into the atmosphere to pollute the environment, and the toxic and irritant black smog also can generate irritation to skin mucous membranes of human bodies when serious, and has phototoxicity and carcinogenesis. Asphalt also can be aged in the heating process, and asphalt aging refers to the process of changing the internal molecular structure and chemical components of asphalt and further promoting the deterioration of the physicochemical properties of asphalt due to the physical and chemical effects of volatilization, oxidation, polymerization and the like which occur under the action of environmental factors due to long-time exposure of asphalt in the storage, construction and pavement use processes. Thermal oxidation is the most important cause of asphalt aging, which is the result of the reaction of active groups in asphalt with oxygen in air, and the oxidized products are mainly carbonyl and alum functional groups, and the advanced aging is likely to generate shuttle functional groups. Intermolecular association and polycondensation result in an increase in the average molecular weight of the asphalt after aging. From the analysis of composition and properties, the pitch after aging has reduced gum, increased asphaltenes, increased softening point, increased viscosity, and reduced penetration and ductility. The asphalt performance attenuation caused by asphalt aging can cause the indoor test result to deviate from the actual situation seriously, and the accuracy and the credibility of the test result are influenced greatly.
Disclosure of Invention
The invention aims to provide a pneumatic solid asphalt sampling device, which avoids the problems of aging of samples, environmental pollution and the like in the process of sampling asphalt and overcomes the problems of low efficiency and insufficient safety of asphalt taking technology in a laboratory; the device simple structure, reasonable in design can take out the pitch sample from pitch storage barrel fast.
The invention aims at solving the problems by the following technical scheme:
the pneumatic solid asphalt sampling device comprises an asphalt sampling device, a motor for providing rotation of the asphalt sampling device, and a handrail for providing downward pressure of the asphalt sampling device; wherein pitch sampling device is provided with heating device including the bottom for open-ended pitch sampling bucket on the pitch sampling bucket, pitch sampling bucket top and atmospheric pressure control room intercommunication, and the atmospheric pressure control room passes through the arm and is connected with the motor.
Furthermore, the invention is characterized in that:
wherein the heating device is an electric heating wire arranged in the barrel wall of the asphalt sampling barrel.
Wherein the heating device also comprises a temperature sensor arranged on the barrel wall of the asphalt sampling barrel.
The air pressure control chamber is of a hollow cylinder structure with an opening at the bottom, and the top of the air pressure control chamber is connected with the motor through a mechanical arm.
Wherein the air pressure control chamber is also provided with a control valve for controlling the communication between the air in the air pressure control chamber and the external environment.
Wherein the motor is arranged on the working platform.
Wherein two opposite handrails are arranged on the working platform.
The beneficial effects of the invention are as follows: the asphalt sampling device can be pressed down under the action of the motor and the handrail to extract solid asphalt in the solid asphalt storage barrel, wherein the air pressure control chamber utilizes air pressure difference to extract solid asphalt samples; the mechanical arm connected with the motor rotates, so that the air pressure control chamber and the asphalt sampling device are downwards rotated to be inserted into solid asphalt, and the asphalt on the barrel wall of the asphalt sampling barrel can be softened by the heating device so as to reduce viscosity, so that the asphalt sampling barrel is convenient to insert and extract.
Still further, heating device is the heating wire of setting in pitch sample bucket wall, and still is provided with temperature sensor in the bucket wall and is used for controlling the temperature of bucket wall, prevents that the high temperature from leading to pitch sample to produce ageing, influences indoor test result accuracy.
Further, a control valve is arranged on the air pressure control chamber, the control valve controls air in the air pressure control chamber to circulate with the external environment, the bottom of the air pressure control chamber is provided with an opening, and the opening is communicated with a communication port at the top of the asphalt sampling barrel, so that the air pressure control chamber can control the air pressure in the asphalt sampling barrel through the control valve.
Furthermore, the working platform is provided with the opposite handrails, so that the asphalt sampling device can be conveniently pressed down and lifted up.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic cross-sectional view of an asphalt sampling apparatus according to the present invention.
Wherein: 1 is an asphalt sampling barrel; 2 is an air pressure control chamber; 3 is a control valve; 4 is a mechanical arm; 5 is a working platform; 6 is an electric motor; 7 is a connecting wire; 8 is a handrail; 9 is an electronic control device; 10 is a temperature sensor; 11 is an electric heating wire; and 12 is a communication port.
Detailed Description
The invention is described in further detail below with reference to the attached drawing figures:
the invention provides a pneumatic solid asphalt sampling device, which is shown in figure 1, and comprises an asphalt sampling device, wherein an asphalt sampling structure comprises an asphalt sampling barrel 1 with an opening at the bottom, the asphalt sampling barrel 1 is cylindrical, the top of the asphalt sampling barrel 1 is provided with a communication port 12, and the communication port 12 enables the asphalt sampling barrel 1 to be communicated with an air pressure control chamber 2; wherein the asphalt sampling barrel 1 is also provided with a heating device, the heating device is an electric heating wire 11 arranged in the barrel wall of the asphalt sampling barrel 1, and the barrel wall of the asphalt sampling barrel 1 is also provided with a temperature sensor 10; the air pressure control chamber 2 is of a cylindrical structure inversely buckled on the communication port 12, the air pressure control chamber 2 is provided with a control valve 3, the control valve 3 controls the discharge of air in the air pressure control chamber 2, and the air pressure in the air pressure control chamber 2 is regulated.
As shown in fig. 1, the top of the air pressure control chamber 2 is connected with the motor 6 through the mechanical arm 4, the motor 6 is arranged on the working platform 5, the motor 6 is connected with the motor 6 through a wire 7, namely the mechanical arm 4 is connected with the working platform 5, an armrest 8 which can press down the working platform 5 and the mechanical arm 4 communicated with the air pressure control chamber 2 is arranged on the working platform 5, the armrest 8 is two armrests which are oppositely arranged, an electronic control device 9 is also arranged on the working platform 5, and the electronic control device 9 is used for controlling the operation of the motor 6, and the electric heating wire 11 and the temperature sensor 10 work.
The application method of the invention is as follows: placing the asphalt sampling bucket 1 vertically above the asphalt bucket, and then opening the control valve 3; after the device is connected with a power supply, an electric heating wire 11 is communicated, after the asphalt sampling barrel 1 is heated to a proper temperature, a motor 6 is started, the motor 6 drives a mechanical arm 4 to rotate, and an armrest 8 is pressed down, so that the air pressure control chamber 2 drives the asphalt sampling barrel 1 to gradually rotate and cut into the asphalt sampling barrel, and solid asphalt is filled in the asphalt sampling barrel 1; when the asphalt sampling barrel 1 is fully filled with solid asphalt, the motor 6 is stopped to rotate, the control valve 3 is closed, the handrail 8 is held to be lifted upwards, and the air pressure control chamber 2 is fully sealed, so that after the asphalt sampling barrel rises to a certain height, the air pressure control chamber 2 and the outside form a certain pressure difference, the solid asphalt can be pressed in the asphalt sampling barrel 1, and the asphalt sampling barrel 1 takes out the solid asphalt in the asphalt sampling barrel along with the upward lifting of the asphalt sampling barrel 1.
The working principle of the invention is as follows: the control valve is opened to keep the inside and outside of the air pressure control chamber 2 communicated, when the asphalt sampling barrel 1 rotates to cut into solid asphalt and is completely immersed in the solid asphalt, the barrel is completely filled with the asphalt due to the viscous solid asphalt, and at the moment, the air pressure control chamber 2 is completely sealed by closing the control valve 3, so that the air circulation between the air pressure control chamber 2 and the outside is blocked. When the asphalt sampling barrel 1 slowly rises, the asphalt cohesiveness close to the barrel edge is reduced due to the high temperature of the inner wall of the asphalt sampling barrel 1, and the asphalt sample can generate a small amount of vertical displacement, so that the air volume in the airtight air pressure control chamber 2 is increased, the air pressure is reduced, and a pressure difference is formed with the outside, so that the asphalt sample is supported integrally and cannot slide downwards, and the asphalt sample is taken out of the storage barrel. And placing an asphalt storage container below the asphalt sampling device, opening a control valve 3, heating the asphalt sampling barrel 1 to a proper temperature, and reducing the adhesiveness of asphalt at the edge of the asphalt sampling barrel 1 due to the temperature rise, so that the solid asphalt sample falls into the asphalt storage container under the action of gravity to finish solid asphalt sampling.
Claims (5)
1. The pneumatic solid asphalt sampling device is characterized by comprising an asphalt sampling device, a motor (6) for providing rotation of the asphalt sampling device, and a handrail (8) for providing downward pressing of the asphalt sampling device;
the asphalt sampling device comprises an asphalt sampling barrel (1) with an opening at the bottom, a heating device is arranged on the asphalt sampling barrel (1), the top of the asphalt sampling barrel (1) is communicated with an air pressure control chamber (2), and the air pressure control chamber (2) is connected with a motor (6) through a mechanical arm (4);
the heating device is an electric heating wire (11) arranged in the barrel wall of the asphalt sampling barrel (1);
the heating device also comprises a temperature sensor (10) arranged on the barrel wall of the asphalt sampling barrel (1).
2. The pneumatic solid asphalt sampling device according to claim 1, wherein the pneumatic control chamber (2) is a hollow cylinder structure with an opening at the bottom, and the top of the pneumatic control chamber is connected with the motor (6) through a mechanical arm (4).
3. The pneumatic solid asphalt sampling device according to claim 2, wherein the pneumatic control chamber (2) is further provided with a control valve (3) for exhausting the air in the pneumatic control chamber (2).
4. The pneumatic solid asphalt sampling device according to claim 1, wherein the motor (6) is arranged on a working platform (5).
5. Pneumatic solid asphalt sampling device according to claim 4, characterized in that the working platform (5) is provided with two opposite handrails (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710124793.1A CN106644558B (en) | 2017-03-03 | 2017-03-03 | Pneumatic solid asphalt sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710124793.1A CN106644558B (en) | 2017-03-03 | 2017-03-03 | Pneumatic solid asphalt sampling device |
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| Publication Number | Publication Date |
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| CN106644558A CN106644558A (en) | 2017-05-10 |
| CN106644558B true CN106644558B (en) | 2023-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710124793.1A Active CN106644558B (en) | 2017-03-03 | 2017-03-03 | Pneumatic solid asphalt sampling device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108844769B (en) * | 2018-09-21 | 2020-08-25 | 云南通衢工程检测有限公司 | Quantitative indoor solid asphalt rapid heating and extracting system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7571658B1 (en) * | 2006-11-07 | 2009-08-11 | Norman Joseph Elliott | Asphalt sampling device |
| CN103196813A (en) * | 2013-04-28 | 2013-07-10 | 长安大学 | Evaluation method of road surface bituminous mixture separation degree |
| CN204373954U (en) * | 2015-02-03 | 2015-06-03 | 东营市公路管理局公路养护中心 | A kind of pitch fast sampling sample device |
| CN106081366A (en) * | 2016-08-11 | 2016-11-09 | 陕西长大博源公路养护科技有限公司 | A kind of self-cleaning asphalt sampling device for mixed material |
| CN206609635U (en) * | 2017-03-03 | 2017-11-03 | 长安大学 | A kind of vapour-pressure type pitch rapid sampling attachment |
-
2017
- 2017-03-03 CN CN201710124793.1A patent/CN106644558B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7571658B1 (en) * | 2006-11-07 | 2009-08-11 | Norman Joseph Elliott | Asphalt sampling device |
| CN103196813A (en) * | 2013-04-28 | 2013-07-10 | 长安大学 | Evaluation method of road surface bituminous mixture separation degree |
| CN204373954U (en) * | 2015-02-03 | 2015-06-03 | 东营市公路管理局公路养护中心 | A kind of pitch fast sampling sample device |
| CN106081366A (en) * | 2016-08-11 | 2016-11-09 | 陕西长大博源公路养护科技有限公司 | A kind of self-cleaning asphalt sampling device for mixed material |
| CN206609635U (en) * | 2017-03-03 | 2017-11-03 | 长安大学 | A kind of vapour-pressure type pitch rapid sampling attachment |
Non-Patent Citations (1)
| Title |
|---|
| 沥青的老化机理与性能研究;赵志军等;《建材世界》(第02期);全文 * |
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| CN106644558A (en) | 2017-05-10 |
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