阅读说明：本技术 一种铺路用沥青软化点的检测系统 (Detection system for asphalt softening point for paving ) 是由 田国雪 于 2021-02-20 设计创作，主要内容包括：本发明公开了一种铺路用沥青软化点的检测系统,包括操作箱；所述操作箱上侧设置有玻璃烧杯；所述玻璃烧杯上侧设置有端盖；所述端盖上设置有搅拌装置；所述玻璃烧杯内设置有支撑板；所述支撑板上侧设置有试样环；所述试样环内设置有钢球定位环；所述端盖上设置有限位管；所述限位管下侧连接有钢球结构；所述钢球结构位于试样环上方；所述玻璃烧杯内侧设置有电加热器；所述电加热器与操作箱电连接,所述玻璃烧杯内设置有温度测量装置。通过设置限位管,限制小球的移动轨迹,使其保持垂直下落,提高了测量精度,同时设置搅拌轴,能够使试样均匀受热,改善了测量效果。(The invention discloses a detection system of a softening point of asphalt for paving, which comprises an operation box; a glass beaker is arranged on the upper side of the operation box; an end cover is arranged on the upper side of the glass beaker; the end cover is provided with a stirring device; a support plate is arranged in the glass beaker; a sample ring is arranged on the upper side of the supporting plate; a steel ball positioning ring is arranged in the sample ring; the end cover is provided with a limiting pipe; the lower side of the limiting pipe is connected with a steel ball structure; the steel ball structure is positioned above the sample ring; an electric heater is arranged on the inner side of the glass beaker; the electric heater is electrically connected with the operation box, and a temperature measuring device is arranged in the glass beaker. Through setting up spacing pipe, the removal orbit of restriction bobble makes it keep the vertical whereabouts, has improved measurement accuracy, sets up the (mixing) shaft simultaneously, can make sample thermally equivalent, has improved measuring effect.)

1. A system for detecting the softening point of asphalt for paving, characterized by comprising an operation box (1); a glass beaker (2) is arranged on the upper side of the operation box (1); an end cover (7) is arranged on the upper side of the glass beaker (2); the end cover (7) is provided with a stirring device (9); a support plate (3) is arranged in the glass beaker (2); a sample ring (12) is arranged on the upper side of the supporting plate (3); a steel ball positioning ring (1202) is arranged in the sample ring (12); the end cover (7) is provided with a limiting pipe (6); the lower side of the limiting pipe (6) is connected with a steel ball structure (4); the steel ball structure (4) is positioned above the sample ring (12); an electric heater (5) is arranged on the inner side of the glass beaker (2); the electric heater (5) is electrically connected with the operation box (1), and a temperature measuring device (11) is arranged in the glass beaker (2).

2. A system for detecting the softening point of asphalt for paving according to claim 1, wherein the stirring device (9) comprises a motor, a stirring shaft (13) and fan blades (14); the output shaft of the motor is connected with a stirring shaft (13); the fan blades (14) are arranged below the stirring shaft (13).

3. A system for detecting the softening point of asphalt for paving according to claim 2, wherein the stirring shaft (13) penetrates the supporting plate (3); the fan blades (14) are positioned below the supporting plate (3).

4. A system for detecting the softening point of asphalt for paving according to claim 1 or 3, wherein the number of the sample rings (12) is two, and the two sample rings (12) are symmetrical about the axis of the glass beaker (2).

5. The asphalt softening point detection system for paving according to claims 1-4, wherein the limiting pipe (6) comprises a round pipe (601), and a limiting hole (602) is arranged on the surface of the round pipe (601).

6. The asphalt softening point detection system for paving according to claim 5, wherein the steel ball structure (4) comprises a steel ball (401), a connecting rod (402) and a limit pin (403); the connecting rod (402) is connected with the steel ball (401); the limiting pin (403) is arranged on the upper side of the connecting rod (402).

7. The asphalt softening point detection system for paving according to claim 6, wherein the connecting rod (402) is inserted into the circular tube (601), and the limit pin (403) is located in the limit hole (602).

Technical Field

The invention belongs to the technical field of asphalt detection equipment, and particularly relates to a detection system for a softening point of asphalt for paving.

Background

According to the national standard requirement, the ring-and-ball method is used for measuring the softening point of viscous petroleum asphalt, steel balls with the diameter of 9.35mm and the mass of 3.5 +/-0.05 g are placed on a copper ring with a specified size of an asphalt sample, the asphalt sample is softened under the heating condition that the temperature is increased by 5 +/-0.5 ℃ per minute, and the temperature when the steel balls sink to 25.4mm is the softening point (expressed by DEG C) of the asphalt sample. The softening point of the asphalt reflects to some extent the temperature stability of the asphalt.

In actual detection, when the rubber asphalt softening point is measured by a standard specified ring and ball method, the rubber powder particles in the rubber asphalt have stress concentration effect, so that the steel ball sinks along a curve in the sinking process, the error of detection data is larger, and the problem of uneven heating of a sample exists, so that the error of a measurement result is larger.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a detection system for the softening point of asphalt for paving, which limits the moving track of a small ball by arranging a limiting pipe, so that the small ball keeps falling vertically, thereby improving the measurement precision, and meanwhile, the stirring shaft is arranged, so that a sample can be uniformly heated, and the measurement effect is improved.

The invention provides the following technical scheme:

a system for detecting the softening point of asphalt for paving comprises an operation box; a glass beaker is arranged on the upper side of the operation box; an end cover is arranged on the upper side of the glass beaker; the end cover is provided with a stirring device; a support plate is arranged in the glass beaker; a sample ring is arranged on the upper side of the supporting plate; a steel ball positioning ring is arranged in the sample ring; the end cover is provided with a limiting pipe; the lower side of the limiting pipe is connected with a steel ball structure; the steel ball structure is positioned above the sample ring; an electric heater is arranged on the inner side of the glass beaker; the electric heater is electrically connected with the operation box, and a temperature measuring device is arranged in the glass beaker.

Preferably, the stirring device comprises a motor, a stirring shaft and fan blades; the output shaft of the motor is connected with the stirring shaft; the fan blades are arranged below the stirring shaft.

Preferably, the stirring shaft penetrates through the support plate; the fan blades are positioned below the supporting plate.

Preferably, the number of the sample rings is two, and the two sample rings are symmetrical about the axis of the glass beaker.

Preferably, the limiting pipe comprises a circular pipe, and a limiting hole is formed in the surface of the circular pipe.

Preferably, the steel ball structure comprises a steel ball, a connecting rod and a limit pin; the connecting rod is connected with the steel ball; the limiting pin is arranged on the upper side of the connecting rod.

Preferably, the connecting rod is inserted in the round pipe, and the limiting pin is positioned in the limiting hole.

Preferably, the end cover is provided with a vent pipe, and the vent pipe is connected with a gas treatment device.

Preferably, a clamping device is arranged on the end cover and comprises a shell, a first clamping plate and a second clamping plate; a spring is arranged between the first clamping plate and the second clamping plate, one end of the spring is connected with the first clamping plate, and the other end of the spring is connected with the second clamping plate.

Preferably, the first clamping plate is in contact with the limiting pipe.

Preferably, the temperature measuring device is a thermometer or a temperature sensor, and the temperature sensor is electrically connected with the operation box.

Preferably, a processor is arranged on the inner side of the operation box, the electric heater is electrically connected with the processor, and the temperature sensor is electrically connected with the processor.

Preferably, in order to enable the steel ball to fall in the vertical direction during heating, R1 is greater than or equal to 1.1R 2 and less than or equal to 1.5R 2 are satisfied between the inner diameter R1 of the round pipe and the outer diameter R2 of the connecting rod.

Preferably, in order to heat the sample uniformly and reduce the vibration of the device, the rotating speed W of the stirring device is 10-20 r/s.

Preferably, the volume of the glass beaker is V, the diameter D of the sample ring and the rotating speed W of the stirring device satisfy the following relations:

D=（V/W）·2π·α；

wherein the unit of V is ml; the unit of D is mm, alpha is a correlation coefficient, and the value range is 0.16-0.52.

Preferably, the use method of the detection system for the softening point of the asphalt for paving comprises the following steps:

s1, placing the sample in the sample ring to make the sample level with the sample ring;

s2: adjusting the position height of the limiting pipe to enable the limiting pin to be positioned at the top of the limiting hole of the circular pipe;

s3, placing the sample and the sample ring in a glass beaker, and adding a liquid medium;

s4, slowly heating the liquid medium, and heating the liquid medium by an electric heater;

s5, when the limiting pin is positioned at the bottom of the limiting hole of the circular tube, recording the temperature, namely the softening point of the asphalt;

s6: the average value of the two groups of data is the temperature of the asphalt softening point.

Preferably, in S4, the gas generated in the glass beaker is collected through a vent pipe.

Compared with the prior art, the invention has the following beneficial effects:

(1) according to the asphalt softening point detection system for paving, the stirring device is arranged, so that the sample can be uniformly heated, and the detection precision is improved.

(2) According to the detection system for the asphalt softening point for paving, disclosed by the invention, the steel ball can move downwards along the vertical direction by arranging the limiting pipe, so that the curved motion of the steel ball is avoided, and the detection precision is improved.

(3) According to the asphalt softening point detection system for paving, the vent pipe is arranged and connected with the gas treatment device, so that gas generated in the heating process can be prevented from polluting the environment, and the safety of the experimental environment is ensured.

(4) According to the asphalt softening point detection system for paving, disclosed by the invention, the volume of the glass beaker is limited to be V, the diameter D of the sample ring and the rotating speed W of the stirring device are limited, so that the sample is uniformly heated, the heating effect is improved, and the detection precision is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is a schematic view of a sample loop of the present invention.

FIG. 3 is a schematic view of the steel ball retaining ring of the present invention.

Fig. 4 is a schematic view of the structure of the chucking device of the present invention.

Fig. 5 is a schematic view of the inventive spacing tube.

Fig. 6 is a schematic view of the structure of the steel ball of the present invention.

In the figure: 1. an operation box; 2. a glass beaker; 3. a support plate; 4. a steel ball structure; 5. an electric heater; 6. a limiting pipe; 7. an end cap; 8. a clamping device; 9. a stirring device; 10. a breather pipe; 11. a temperature measuring device; 12. a sample ring; 13. a stirring shaft; 14. a fan blade; 401. a steel ball; 402. a connecting rod; 403. a spacing pin; 601. a circular tube; 602. a limiting hole; 801. a housing; 802. a first clamping plate; 803. a second clamping plate; 804. a spring; 1201. and a steel ball positioning ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described in detail and completely with reference to the accompanying drawings. It is to be understood that the described embodiments are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

The first embodiment is as follows:

as shown in fig. 1-6, a system for detecting the softening point of asphalt for paving comprises an operation box 1, wherein the operation box 1 is provided with a display and a processor, and the display is electrically connected with the processor; a glass beaker 2 is arranged on the upper side of the operation box 1; an end cover 7 is arranged on the upper side of the glass beaker 2; the end cover 7 is provided with a stirring device 9, and the stirring device 9 can stir the heating medium in the beaker, so that the temperature of the heating medium is ensured to be uniformly increased; a support plate 3 is arranged in the glass beaker 2; a sample ring 12 is arranged on the upper side of the supporting plate 3; a steel ball positioning ring 1201 is arranged in the sample ring 12; the end cover 7 is provided with a limiting pipe 6; the lower side of the limiting pipe 6 is connected with a steel ball structure 4; the steel ball structure 4 is positioned above the sample ring 12; an electric heater 5 is arranged on the inner side of the glass beaker 2; the electric heater 5 is electrically connected with the operation box 1, and a temperature measuring device 11 is arranged in the glass beaker 2.

The stirring device 9 comprises a motor, a stirring shaft 13 and fan blades 14; the output shaft of the motor is connected with the stirring shaft 13; the fan blades 14 are arranged below the stirring shaft 13. The stirring shaft 13 penetrates through the support plate 3; the fan blades 14 are located below the support plate 3, and the fan blades 14 stir liquid below the support plate 3.

The number of the sample rings 12 is two, and the two sample rings 12 are symmetrical with respect to the axis of the glass beaker 2. The limiting pipe 6 comprises a circular pipe 601, and a limiting hole 602 is formed in the surface of the circular pipe 601. The steel ball structure 4 comprises a steel ball 401, a connecting rod 402 and a limit pin 403; the connecting rod 402 is connected with the steel ball 401; the stopper pin 403 is provided on the upper side of the connecting rod 402.

The connecting rod 402 is inserted in the circular tube 601, the limit pin 403 is located in the limit hole 602, and the moving length of the limit pin 403 in the limit hole 602 is 25.4 mm.

The end cover 7 is provided with a vent pipe 10, and the vent pipe 10 is connected with a gas treatment device. Harmful gas generated in the heating process is effectively prevented from polluting the air.

A clamping device 8 is arranged on the end cover 7, and the clamping device 8 comprises an outer shell 801, a first clamping plate 802 and a second clamping plate 803; a spring 804 is arranged between the first card board 802 and the second card board 803, one end of the spring 804 is connected with the first card board 802, and the other end is connected with the second card board 803. The first catch plate 802 is in contact with the stopper tube 6. The clamping device 8 is used for fixing the limiting pipe 6.

The temperature measuring device 11 is a thermometer or a temperature sensor, and the temperature sensor is electrically connected with the operation box 1. The processor is arranged on the inner side of the operation box 1, the electric heater 5 is electrically connected with the processor, and the temperature sensor is electrically connected with the processor.

In order to enable the steel ball to fall in the vertical direction during heating, R1 is more than or equal to 1.1R 2 and less than or equal to 1.5R 2 is met between the inner diameter R1 of the circular tube and the outer diameter R2 of the connecting rod, when the above relation is met, the steel ball structure 4 can move downwards smoothly, and when R1 is less than 1.1R 2, in the downward moving process of the steel ball 401, a large friction force is generated between the circular tube 601 and the connecting rod 402 to influence the downward moving of the steel ball 401, and when R1 is more than 1.5R 2, the connecting rod 402 is prone to shaking in the circular tube 601, so that the steel ball 401 is difficult to fall in the vertical direction. In order to heat the sample uniformly and reduce the vibration of the device, the rotating speed W of the stirring device is 10-20r/s, when W is less than 10r/s, the stirring effect is poor, the temperature in the beaker rises unevenly, when W is more than 20r/s, the stirring speed is too high, the vibration is easy to generate, and the use of the device is not facilitated.

Example two:

the difference from the first embodiment is that the volume of the glass beaker is V, the diameter D of the sample ring and the rotating speed W of the stirring device satisfy the following relations: d = (V/W) · 2 π α; wherein the unit of V is ml; the unit of D is mm, alpha is a correlation coefficient, and the value range is 0.16-0.52. When alpha is less than 0.16, the diameter D of the sample ring is small, the temperature of the sample rises too fast, and the measurement error is large; when alpha is larger than 0.52, the diameter D of the sample ring is larger, so that the sample is easily heated too slowly, and the experimental efficiency is low.

Example three:

taking five glass beakers with the same volume and dividing the five glass beakers into 5 groups to carry out experiments simultaneously, wherein the rotating speeds of the stirring devices in the five groups of experiments are the same and are W, the diameters of the used sample rings D1, D2, D3, D4 and D5 respectively correspond to the diameters of alpha 1=0.12, alpha 2=0.16, alpha 3=0.34, alpha 4=0.52 and alpha 5=0.6, the medium and the samples in the beakers are heated, a limiting pipe and a steel ball structure are not used, the time required for placing the steel ball on the sample to sink by 20mm and the track deviation of the steel ball are not used, and the time required for placing the steel ball on the sample to sink is 30 minutes and the track deviation of the steel ball is 9mm when the D1 group corresponding to the alpha 1=0.12 is used; when the time of a D2 experiment group corresponding to alpha 2=0.16 is 35 minutes, the trajectory deviation of the steel ball is 5 mm; when the time of a D3 experiment group corresponding to the alpha 3=0.34 is 37 minutes, the track deviation of the steel ball is 3 mm; when the time of a D4 experiment group corresponding to alpha 4=0.52 is 38 minutes, the track deviation of the steel ball is 3 mm; when the time of a D5 experiment group corresponding to alpha 5=0.6 is 42 minutes, the track deviation of the steel ball is 2 mm; and comprehensively considering, when the value range of alpha is 0.16-0.52, the experimental effect is optimal.

Example four:

the use method of the detection system for the softening point of the asphalt for paving comprises the following steps:

s1, placing the sample in the sample ring to make the sample level with the sample ring;

s2: adjusting the position height of the limiting pipe to enable the limiting pin to be positioned at the top of the limiting hole of the circular pipe;

s3, placing the sample and the sample ring in a glass beaker, and adding a liquid medium;

s4, slowly heating the liquid medium, and heating the liquid medium by an electric heater;

s5, when the limiting pin is positioned at the bottom of the limiting hole of the circular tube, recording the temperature, namely the softening point of the asphalt;

s6: the average value of the two groups of data is the temperature of the asphalt softening point.

In S4, the gas generated in the glass beaker is collected through the vent pipe, so that the air is effectively prevented from being polluted by harmful gas.

EXAMPLE five

A detection system of a softening point of asphalt for paving comprises an operation box 1, wherein the operation box 1 is provided with a display; a glass beaker 2 is arranged on the upper side of the operation box 1; an end cover 7 is arranged on the upper side of the glass beaker 2; the end cover 7 is provided with a stirring device 9, and the stirring device 9 can stir the heating medium in the beaker, so that the temperature of the heating medium is ensured to be uniformly increased; a support plate 3 is arranged in the glass beaker 2; a sample ring 12 is arranged on the upper side of the supporting plate 3; a steel ball positioning ring 1201 is arranged in the sample ring 12; the end cover 7 is provided with a limiting pipe 6; the lower side of the limiting pipe 6 is connected with a steel ball structure 4; the steel ball structure 4 is positioned above the sample ring 12; an electric heater 5 is arranged on the inner side of the glass beaker 2; the electric heater 5 is electrically connected with the operation box 1, and a temperature measuring device 11 is arranged in the glass beaker 2.

The stirring device 9 comprises a motor, a stirring shaft 13 and fan blades 14; the output shaft of the motor is connected with the stirring shaft 13; the fan blades 14 are arranged below the stirring shaft 13. The stirring shaft 13 penetrates through the support plate 3; the fan blades 14 are located below the support plate 3, and the fan blades 14 stir liquid below the support plate 3.

The number of the sample rings 12 is two, and the two sample rings 12 are symmetrical with respect to the axis of the glass beaker 2. The limiting pipe 6 comprises a circular pipe 601, and a limiting hole 602 is formed in the surface of the circular pipe 601. The steel ball structure 4 comprises a steel ball 401, a connecting rod 402 and a limit pin 403; the connecting rod 402 is connected with the steel ball 401; the stopper pin 403 is provided on the upper side of the connecting rod 402.

The connecting rod 402 is inserted in the circular tube 601, the limit pin 403 is located in the limit hole 602, the moving length of the limit pin 403 in the limit hole 602 is larger than 25.4mm, a switch is arranged at a position 25.4mm away from the upper end of the limit hole 602, a display lamp is arranged on the outer side of the glass beaker 2 and electrically connected with the switch, when the limit pin 403 is in contact with the switch, the display lamp emits light, and at the moment, the temperature in the glass beaker is recorded, namely the temperature of the asphalt softening point.

The end cover 7 is provided with a vent pipe 10, and the vent pipe 10 is connected with a gas treatment device. Harmful gas generated in the heating process is effectively prevented from polluting the air.

A clamping device 8 is arranged on the end cover 7, and the clamping device 8 comprises an outer shell 801, a first clamping plate 802 and a second clamping plate 803; a spring 804 is arranged between the first card board 802 and the second card board 803, one end of the spring 804 is connected with the first card board 802, and the other end is connected with the second card board 803. The first catch plate 802 is in contact with the stopper tube 6. The first clamping plate 802 is provided with a rubber ring at the contact position with the corresponding limiting pipe 6, the second clamping plate 803 is provided with a rubber ring at the contact position with the corresponding limiting pipe 6, the friction force between the first clamping plate 802 and the limiting pipe 6 is increased by arranging the rubber ring, the friction force between the second clamping plate 803 and the limiting pipe 6 is increased, the limiting pipe 6 is more firmly fixed, and the clamping device 8 is used for fixing the limiting pipe 6.

The temperature measuring device 11 is a temperature sensor, and the temperature sensor is electrically connected with the operation box 1. The processor is arranged on the inner side of the operation box 1, the electric heater 5 is electrically connected with the processor, and the temperature sensor is electrically connected with the processor.

EXAMPLE six

With reference to the first embodiment: the temperature measuring device 11 is a thermometer, and when the limiting pin is positioned at the bottom of the limiting hole of the circular tube, the temperature of the thermometer is read, and at the moment, the temperature is the softening point of the asphalt.

The device that obtains through above-mentioned technical scheme is a detection system who paves with pitch softening point, through setting up spacing pipe, restricts the removal orbit of bobble, makes it keep the vertical whereabouts, has improved measurement accuracy, sets up the (mixing) shaft simultaneously, can make sample thermally equivalent, has improved measurement effect.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention; any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.