CN102519758B - Automatic asphalt measuring device - Google Patents

Automatic asphalt measuring device Download PDF

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Publication number
CN102519758B
CN102519758B CN 201110425666 CN201110425666A CN102519758B CN 102519758 B CN102519758 B CN 102519758B CN 201110425666 CN201110425666 CN 201110425666 CN 201110425666 A CN201110425666 A CN 201110425666A CN 102519758 B CN102519758 B CN 102519758B
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China
Prior art keywords
heating
storehouse
pitch
main
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Expired - Fee Related
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CN 201110425666
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Chinese (zh)
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CN102519758A (en
Inventor
裴建中
包得祥
李彦伟
杜群乐
石鑫
温永
赵晓康
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Changan University
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Changan University
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Priority to CN 201110425666 priority Critical patent/CN102519758B/en
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Publication of CN102519758B publication Critical patent/CN102519758B/en
Expired - Fee Related legal-status Critical Current
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Abstract

The invention relates to an automatic asphalt measuring device, wherein a computer, a programmable controller, a motor, an auxiliary heating warehouse and a weighing unit are arranged above a main heating warehouse; the weighing unit is communicated with the main heating warehouse through a reflux valve; an asphalt inlet cover is arranged on the top of the auxiliary heating warehouse; the auxiliary heating warehouse is communicated with the main heating warehouse through an asphalt input one-way valve; the main heating warehouse is communicated with the auxiliary heating warehouse through an asphalt output one-way valve and the reflux valve; a piston is arranged in the main heating warehouse; a gear rack processed on the piston rod of the piston is meshed with a gear on the output shaft of the motor; a displacement sensor is arranged on the piston; an asphalt output pipeline with a manual knife gate valve is arranged on the side wall of the main heating warehouse; a reflux cavity in the main heating warehouse at the communication place between the main heating warehouse and the auxiliary heating warehouse is communicated with the main heating warehouse through a main reflux valve;a temperature sensor is arranged in the reflux cavity; the temperature sensor, the displacement sensor and the weighing unit are connected with the computer through a conducting wire; and thermal insulation layers and heating pipes connected with the programmable controller are arranged on the outer walls of the main heating warehouse, the auxiliary heating warehouse and the weighing unit.

Description

Automatically pitch is measured device
Technical field
The invention belongs to equipment or the device technique field of measuring fluent meterial gravity, be specifically related to adopt automatic control system to measure the equipment of measuring of liquid bitumen.
Background technology
Pitch is that a kind of component complexity, character and the tangible normal temperature of temperature variation are thick material, but is widely used in construction work and road engineering field owing to pitch has good dense water, ageing properties and adhesion property.Simultaneously because the chemical composition and the physical property of pitch complexity make accurate asphalt test become particularly important, pitch measure the first step as pitch and asphalt test, its accurate degree direct influence is to test figure and conclusion (of pressure testing).Pitch measure with other working fluids to measure difference bigger, be limited by the character of pitch complexity to a great extent, the temperature that will control simultaneously pitch in the process of measuring well can not make pitch produce and wear out, otherwise can directly influence the test findings of pitch and asphalt.
At present " highway engineering pitch and the asphalt testing regulations " implemented (JTJ052-2000) in not with regard to pitch take by weighing method and process is strict with, and do not have a kind of experimental facilities that can precisely measure pitch in the laboratory.The technical matters that mainly exists when testing laboratory makes pitch test specimen and bitumen mixture specimen is: asphalt temperature can not be controlled accurately, and it is bigger to build in the process temperature variation at test specimen; Test specimen is built in the process, and asphalt content can not accurately be controlled, and it is bigger influenced by human factor; The pitch loss has caused very big waste greatly when building pitch and bitumen mixture specimen; Aging obvious to the performance impact of pitch, do not carry out strictness control heat time heating time in the existing standard with regard to pitch, this has also caused bigger influence to experimental result; Existing testing laboratory pitch heating means are too simple, and pitch is heated inhomogeneous; The laboratory asphalt density measuring method of existing standard can not record and be higher than 100 ℃ asphalt density.These factors directly influence the data and the conclusion of pitch and asphalt related experiment.
Summary of the invention
Technical matters to be solved by this invention is to overcome in prior art medium pitch test and the asphalt process of the test existing asphalt density measurement, consumption and controls inaccurate problem, provide a kind of simple in structure, can accurately measure, accurately control, automaticity height, easy to operate automatic pitch are measured device.
Solving the problems of the technologies described above the technical scheme that is adopted is: be provided with computing machine above the main storehouse of heating, Programmable Logic Controller, motor, heat secondary storehouse, weighing unit, Programmable Logic Controller is by lead and computing machine, motor links to each other, weighing unit links with the main storehouse of heating by the reverse flow valve that is installed on the recirculatory pipe, be provided with pitch input flap at the top in the secondary storehouse of heating, heating secondary storehouse links with the main storehouse of heating by the pitch input retaining valve that is arranged on the UNICOM road, heating main storehouse links with heating pair storehouse by pitch output retaining valve and the reverse flow valve that is installed on the recirculatory pipe, heat in the main storehouse and be provided with piston, be processed with the gearing mesh on tooth bar and the motor output shaft on the piston rod of piston, piston is provided with displacement transducer, the pitch output channel that the hand knife gate valve is installed is set on the sidewall in the main storehouse of heating, heat in the main storehouse and form back cavity with the connection position of heating secondary storehouse, back cavity links by the backflow main valve with the main storehouse of heating, be provided with temperature sensor in the back cavity, temperature sensor, displacement transducer, weighing unit links to each other with computing machine by lead, heats main storehouse, heat secondary storehouse, the outer wall of the periphery of weighing unit is provided with heat-insulation layer and the heating tube that links to each other with Programmable Logic Controller by lead.
Weighing unit of the present invention is: balance is provided with volumetric flask, the gravity sensor that links to each other with computing machine by lead under the balance, and the reverse flow valve that the volumetric flask top is provided with by being installed on the recirculatory pipe links with the main storehouse of heating.
The present invention carries out heat tracing by controller control heating tube to the pitch that heats main storehouse and the secondary storehouse of heating, and by being built up in the main storehouse of heating and heating reflux line between the secondary storehouse and piston control makes pitch and to heat between the secondary storehouse in the main storehouse of heating to circulate, not only make the pitch can thermally equivalent, the temperature and the time of pitch heating can be well controlled, high insulating effect, temperature loss is little in the process of the test, and each circulation can both be discharged in time and entered into the air that pitch heats main storehouse; The present invention will heat the pitch that is heated to design temperature in the main storehouse by recirculatory pipe and add weighing unit, read asphalt quality information in the volumetric flask in real time by the balance of weighing unit, and be transferred to computing machine, computing machine calculates according to the program of prior setting, calculate by the Controlled by Programmable Controller rotating speed of motor and adjust the displacement of piston in the main storehouse of heating, the asphalt quality that control is exported from the pitch output channel that heats main storehouse so that accurately measure, is accurately controlled asphalt content.That the present invention has is reasonable in design, simple in structure, can accurately measure, accurately control, automaticity height, advantage such as easy to operate, can be used for taking by weighing pitch.
Description of drawings
Fig. 1 is the structural representation of one embodiment of the invention.
Embodiment
The present invention is described in more detail below in conjunction with drawings and Examples, but the invention is not restricted to these embodiment.
Referring to Fig. 1, the automatic pitch of present embodiment is measured device and is connected by computing machine 1, Programmable Logic Controller 2, motor 3, displacement transducer 4, piston 5, the main storehouse 6 of heating, hand knife gate valve 7, pitch output channel 8, backflow main valve 9, temperature sensor 10, pitch output retaining valve 11, pitch input retaining valve 12, heat-insulation layer 13, recirculatory pipe 14, conducting valve 15, reverse flow valve 16, pitch input flap 17, the secondary storehouse 18 of heating, volumetric flask 19, balance 20, gravity sensor 21, heating tube 22 and constitute.
Above the main storehouse 6 of heating, computing machine 1, Programmable Logic Controller 2, motor 3 are installed, Programmable Logic Controller 2, the commodity of Programmable Logic Controller 2 for selling on the market, model is CPM1A-20CDR-D-V1, motor 3 is a servomotor, and Programmable Logic Controller 2 links to each other with motor 3 with computing machine 1 by lead.
Top in the secondary storehouse 18 of heating is equipped with pitch input flap 17 by screw thread, fix-bitumen adds from the top of heating secondary storehouse 18, heating secondary storehouse 18 links with the main storehouse 6 of heating by the pitch input retaining valve 12 that is installed on the UNICOM road, heat liquid bitumens in the secondary storehouse 18 pitch input retaining valve 12 of flowing through and enter into the main storehouse 6 of heating, heating main storehouse 6 links with the secondary storehouse 18 of heating by pitch output retaining valve 11 and the reverse flow valve 16 that is installed on the recirculatory pipe 14, heating in the main storehouse 6 liquid bitumens pitch output retaining valve 11 and the reverse flow valve 16 that is installed on the recirculatory pipe 14 of flowing through flows out in the secondary storehouse 18 of heating, liquid bitumen can circulate in secondary storehouse 18 of heating and the main storehouse 6 of heating, heat main storehouse 6, the outer wall that heats secondary storehouse 18 is equipped with heating tube 22 and heat-insulation layer 13, and heating tube 22 links to each other with Programmable Logic Controller 2 by lead.In the main storehouse 6 of heating, piston 5 is installed, be processed with the gearing mesh on tooth bar and motor 3 output shafts on the piston rod of piston 5, be fixedly connected with the screw threads for fastening connector on the piston 5 displacement transducer 4 is installed, displacement transducer 4 links to each other with Programmable Logic Controller 2 by lead, motor 3 drives piston 5 and moves in the main storehouse 6 of heating, displacement transducer 4 converts the displacement signal of received piston 5 to electric signal and outputs to computing machine 1, computing machine 1 carries out data processing according to the program of at first setting, open by Controlled by Programmable Controller motor 3, close and rotating speed, the displacement of control piston 5, liquid bitumen in the secondary storehouse 18 of heating is pumped in the main storehouse 6 of heating, liquid bitumen in the main storehouse 6 of heating is discharged in the secondary storehouse 18 of heating, realizes that liquid bitumen circulates in main storehouse 6 of heating and the secondary storehouse 18 of heating.By thread connection pitch output channel 8 is installed on the sidewall in the main storehouse 6 of heating, the delivery outlet of pitch output channel 8 is equipped with hand knife gate valve 7 by thread connection, and hand knife gate valve 7 is used to close the delivery outlet of output channel 8, prevents the pitch wire drawing.Connection position with the secondary storehouse 18 of heating in the main storehouse 6 of heating forms back cavity, backflow main valve 9 is installed in the back cavity, back cavity is controlled by backflow main valve 9 with the main storehouse 6 of heating, in back cavity, temperature sensor 10 is installed by thread connection, temperature sensor 10 links to each other with computing machine 1 by lead, the temperature signal that temperature sensor 10 will receive pitch converts electric signal to and converts digital signal to and outputs to computing machine 1, computing machine 1 carries out data processing according to the program of prior setting, the power connection or the disconnection of control heating tube 22 realize that the temperature of pitch is identical with setting value.
The outside in the secondary storehouse 18 of heating is fixedly connected with the screw threads for fastening connector balance 20 is installed, be placed with volumetric flask 19 on the balance 20, balance is equipped with gravity sensor 21 20 times, volumetric flask 19, balance 20, gravity sensor 21 constitute the weighing unit of present embodiment, and the outer periphery of weighing unit is equipped with heating tube 22 and heat-insulation layer 13.Volumetric flask 19 links by being installed in the reverse flow valve 16 on the recirculatory pipe 14 and heating in the main storehouse 6, reverse flow valve 16 output ports are positioned at directly over volumetric flask 19 oral areas, gravity sensor 21 links to each other with computing machine 1 by lead, gravity sensor 21 will receive balance 20 and take by weighing the asphalt quality conversion of signals and become electric signal and convert digital signal to output to computing machine 1, and computing machine 1 calculates and demonstrate the density of pitch and the quality of pitch according to the program of prior setting.Computing machine 1 is moved to the left by Programmable Logic Controller 2 control motors 3 driven plunger 5, along with piston 5 moves, pitch flows out from pitch output channel 8, and the discharge of pitch is realized by the rotating speed of Programmable Logic Controller 2 control motors 3 and the displacement of piston 5 by computing machine 1.
Principle of work of the present invention is as follows:
1, adds heated bitumen
When use in the laboratory, piston 5 is moved to the leftmost side in the main storehouse 6 of heating, open the input control valve of pitch input flap 17 then, liquid or solid-state pitch are joined in the secondary storehouse 18 of heating, the addition of pitch should not be too much but must be satisfied the minimum of building test specimen.Computing machine 1 is by Programmable Logic Controller 2 control heating tube 22 and power connections, after pitch in the secondary storehouse 18 to be heated melts fully, automatically open by Programmable Logic Controller 2 control backflow main valves 9, starting servomotor 3 simultaneously moves piston 5 to the right, the liquid bitumen that heats in the secondary storehouse 18 is sucked the main storehouse 6 of heating by the pitch input retaining valve 12 that is installed on the UNICOM road by negative pressure, Programmable Logic Controller 2 changes motor 3 sense of rotation, piston 5 is moved to the left, at this moment conducting valve 15 is closed, reverse flow valve 16 is opened, the pitch that pitch heats in the main storehouse 6 enters the secondary storehouse 18 of heating by the pitch output retaining valve 11 that is installed on the recirculatory pipe 14, not only make the pitch can thermally equivalent by circulation, and each circulation can both be discharged the air in the main storehouse 6 of heating in time.Carrying out round-robin simultaneously, temperature sensor 10 receives the temperature signal of pitch continuously, outputs to computing machine 1, and computing machine passes through power connection or the disconnection that Programmable Logic Controller 2 is controlled heating tubes 22 according to the program of prior setting, makes it enter keeping warm mode automatically.
2, the density under the measurement pitch Current Temperatures
After entering keeping warm mode, closing volume valve 16 is opened conducting valve 15, heat be heated to the demand temperature in the main storehouse 6 pitch in recirculatory pipe 14 enters pitch volumetric flask 19, when filling pitch in the pitch volumetric flask 19 when just neat mutually, close conducting valve 15, open reverse flow valve 16 with bottleneck.Wipe the pitch that overflows on 19 bottles of walls of pitch volumetric flask, gravity sensor 21 will receive in the volumetric flask 19 quality signal of pitches and convert electric signal to and convert digital signal to and output to computing machine 1, and computing machine 1 calculates the density of pitch according to following formula:
ρ=M/V
M is the quality of pitch in the formula, and ρ is the asphalt density that records under the relevant temperature, and V is the volume of volumetric flask.
3, measure pitch
After recording the density of pitch, computing machine 1 is by Programmable Logic Controller 2 closing volume main valves 9, and displacement transducer 4 is gathered current displacement parameter W 0Required asphalt quality is input to computing machine 1, opens the hand knife gate valve 7 of pitch output channel 8, computing machine 1 is moved to the left by Programmable Logic Controller 2 control motors 3 driven plunger 5, along with the mobile pitch of piston 5 flows out from pitch output channel 8, the displacement that piston 5 moves is calculated as follows:
S=4M 0/πh 2ρ
S is displacement in the formula, M 0Quality for required pitch, ρ is the asphalt density that records, and h is the diameter in the main storehouse 6 of heating, closes automatically when piston 5 stops when mobile pitch output retaining valve 11, stop pitch to flow out, with the pitch of hand knife gate valve 7 fast shut-off wire drawings in order to avoid influence measuring of pitch.After the off-test instrument is split and cleans.

Claims (2)

1. an automatic pitch is measured device, it is characterized in that: be provided with computing machine (1) in top, the main storehouse of heating (6), Programmable Logic Controller (2), motor (3), heat secondary storehouse (18), weighing unit, Programmable Logic Controller (2) is by lead and computing machine (1), motor (3) links to each other, weighing unit links with the main storehouse of heating (6) by the reverse flow valve (16) that is installed on the recirculatory pipe (14), be provided with pitch input flap (17) at the top in the secondary storehouse of heating (18), heating secondary storehouse (18) links with the main storehouse of heating (6) by the pitch input retaining valve (12) that is arranged on the UNICOM road, heating main storehouse (6) links with the secondary storehouse of heating (18) by pitch output retaining valve (11) and the reverse flow valve (16) that is installed on the recirculatory pipe (14), heat and be provided with piston (5) in the main storehouse (6), be processed with the gearing mesh on tooth bar and motor (3) output shaft on the piston rod of piston (5), piston (5) is provided with displacement transducer (4), the pitch output channel (8) that hand knife gate valve (7) is installed is set on the sidewall in the main storehouse of heating (6), heat in the main storehouse (6) and form back cavity with the connection position of heating secondary storehouse (18), back cavity links by backflow main valve (9) with the main storehouse of heating (6), be provided with temperature sensor (10) in the back cavity, temperature sensor (10), displacement transducer (4), weighing unit links to each other with computing machine (1) by lead, heats main storehouse (6), heat secondary storehouse (18), the weighing unit outer wall is provided with heat-insulation layer (13) and the heating tube (22) that links to each other with Programmable Logic Controller (2) by lead.
2. automatic pitch according to claim 1 is measured device, it is characterized in that described weighing unit is: balance (20) is provided with volumetric flask (19), the reverse flow valve (16) that the gravity sensor (21) that links to each other with computing machine (1) by lead under the balance (20), volumetric flask (19) top are provided with by being installed on the recirculatory pipe (14) links with the main storehouse of heating (6).
CN 201110425666 2011-12-15 2011-12-15 Automatic asphalt measuring device Expired - Fee Related CN102519758B (en)

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Application Number Priority Date Filing Date Title
CN 201110425666 CN102519758B (en) 2011-12-15 2011-12-15 Automatic asphalt measuring device

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Application Number Priority Date Filing Date Title
CN 201110425666 CN102519758B (en) 2011-12-15 2011-12-15 Automatic asphalt measuring device

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CN102519758B true CN102519758B (en) 2013-07-24

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110095309B (en) * 2019-05-14 2020-05-05 河海大学 Asphalt layered sampling device in normal temperature environment and sampling method thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5801337A (en) * 1996-01-11 1998-09-01 Barnstead/Thermolyne Corporation Method of and apparatus for compensating for load/environment temperature differential-induced measured load weight error
CN2537731Y (en) * 2002-04-19 2003-02-26 吴东炎 Pitch heater
CN101672686A (en) * 2009-09-30 2010-03-17 陈天佑 Device for measuring weight of liquid asphalt
CN201680891U (en) * 2010-05-26 2010-12-22 浙江美通机械制造有限公司 Device for precisely measuring flow rate of asphalt
CN201803917U (en) * 2010-09-17 2011-04-20 长安大学 Asphalt density and viscosity testing device
CN202403946U (en) * 2011-12-15 2012-08-29 长安大学 Automatic asphalt measuring device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5801337A (en) * 1996-01-11 1998-09-01 Barnstead/Thermolyne Corporation Method of and apparatus for compensating for load/environment temperature differential-induced measured load weight error
CN2537731Y (en) * 2002-04-19 2003-02-26 吴东炎 Pitch heater
CN101672686A (en) * 2009-09-30 2010-03-17 陈天佑 Device for measuring weight of liquid asphalt
CN201680891U (en) * 2010-05-26 2010-12-22 浙江美通机械制造有限公司 Device for precisely measuring flow rate of asphalt
CN201803917U (en) * 2010-09-17 2011-04-20 长安大学 Asphalt density and viscosity testing device
CN202403946U (en) * 2011-12-15 2012-08-29 长安大学 Automatic asphalt measuring device

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
热拌沥青混合料质量实时监控系统开发研究;石鑫;《公路交通科技 应用技术版》;20101231(第12期);291-293 *
石鑫.热拌沥青混合料质量实时监控系统开发研究.《公路交通科技 应用技术版》.2010,(第12期),291-293.

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