CN203720004U - Asphalt and asphalt mixture stirring device for laboratory - Google Patents

Abstract

The utility model discloses a stirring device for asphalt and asphalt mixture used in a laboratory, which comprises a base, a support plate arranged on the base, and a top plate installed on the top of the support plate. A pair of support plates are arranged in parallel, and the There is a heating pot in between, and the heating pot is installed on the bearing fixed on the side of the support plate through the fixed shaft on the side; the pot cover is installed on the heating pot, and the upper end of the pot cover is connected to the top plate through the lifting mechanism; The agitator is installed at the lower end of the hollow shaft passing through the top plate and the pot cover, and the shaft is driven by a motor arranged above the top plate; the agitator is a hollow agitator and is connected with a conduit arranged inside the shaft; the agitator is filled with There is heat conduction oil, and the upper end of the rotating shaft is connected with a heat pump. The utility model has a simple device, is easy to operate, and is safe to use, and can effectively avoid the scalding of operators and the unsatisfactory mixing efficiency and quality.

Description

A mixing device for laboratory asphalt and asphalt mixture

technical field

The utility model relates to an asphalt stirring device, in particular to a laboratory-used asphalt and asphalt mixture stirring device.

Background technique

Asphalt or asphalt mixtures and other materials are mixed when performing asphalt-related experiments in the laboratory. Since asphalt mixing needs to be carried out at high temperature (150°C-200°C), now for the laboratory to add rubber particles or rubber powder to the asphalt, the experimenter usually pours the asphalt into the container and stirs it manually. The efficiency is very low, and the temperature of the asphalt and the mixture cannot be guaranteed. In addition, manual stirring can easily cause asphalt to splash and burn the experimenter. Existing simple mixers generally adopt the form of stirring paddles. When such a mixer is in contact with asphalt, its own temperature cannot be guaranteed, so it is easy to bond with the asphalt, resulting in the surface of the stirring paddles sticking after a period of use. There is a large amount of asphalt, which seriously affects the mixing quality and efficiency of the mixture. Some of the existing mixers cannot heat the asphalt, so the temperature of the asphalt after mixing is lower than the temperature required by the experiment, thus affecting the experimental results.

Contents of the invention

In view of the deficiencies in the above-mentioned existing equipment, the purpose of this utility model is to provide an asphalt and asphalt mixture mixing device, which can mix asphalt and asphalt mixture more uniformly under the temperature conditions required by the experiment, and after a long time of use There will be no situation where a large amount of asphalt sticks to the mixer and affects the mixing quality.

The technical scheme adopted in the utility model is:

An asphalt and asphalt mixture mixing device for laboratory use, including a base, a support plate arranged on the base, and a top plate installed on the top of the support plate, a pair of support plates are arranged in parallel, and a heating pot is arranged between the support plates , the heating pot is installed on the bearing fixed on the side of the support plate through the fixed shaft on its side; the pot cover is installed on the heating pot, and the upper end of the pot cover is connected to the top plate through a lifting mechanism; At the lower end of the hollow rotating shaft passing through the top plate and the pot cover, the rotating shaft is driven by a motor arranged above the top plate; the agitator is a hollow agitator and is connected with a conduit arranged inside the rotating shaft; the agitator is filled with heat transfer oil, and the rotating shaft The upper end is connected to the heat pump.

Further, the agitator includes a pear-shaped inner stirring ring and an outer stirring ring, two outer stirring rings are arranged perpendicular to each other, two inner stirring rings are arranged, and any inner stirring ring is connected The included angle between the ring stirring rings is 45°; both the inner ring stirring ring and the outer ring stirring ring are composed of hollow tubes, and the two ends of the hollow tubes are respectively connected to different conduits inside the rotating shaft.

Further, the heating pot is a double-layer pot, and electric heating tubes are distributed between the double-layer pots.

Further, the lifting mechanism includes a lower screw fixed on the pot cover and an upper screw fixed on the bottom surface of the top plate, the upper screw and the lower screw are connected through a sleeve, and the sleeve is processed with a screw to cooperate with the upper screw and the lower screw. internal thread.

Further, the rotating shaft is connected with the motor through a gear transmission pair.

Further, a rotary handle is provided on the side of the support plate, and the rotary handle passes through the support plate and is connected with the fixed shaft.

The technical characteristics of the utility model are:

(1) The ring type agitator adopts inner and outer two-layer agitation rings to improve the mixing efficiency and mixing quality; the agitator itself acts as a heat source, and together with the heating pot, ensures the mixing temperature required for asphalt and asphalt mixture, and the asphalt will not stick to the on the mixer to make the mixing more even;

(2) The utility model has a simple device, is easy to operate, and is safe to use, which can effectively avoid the scalding of the operator and the unsatisfactory mixing efficiency and quality.

Description of drawings

Fig. 1 is the overall structural diagram of the utility model;

Fig. 2 is a top view schematic diagram of the stirrer;

Fig. 3 is the front view of stirrer;

Fig. 4 is a schematic cross-sectional view of the rotating shaft;

The symbols in the figure represent: 1—motor, 2—sleeve, 3—pot cover, 4—heating pot, 5—rotating shaft, 6—stirrer, 61—outer ring stirring ring, 62—inner ring stirring ring, 7—base , 8—branch plate, 9—rotating handle, 10—lower screw, 11—top plate, 12—pipe, 121—oil inlet pipe, 122—oil outlet pipe, 13—upper screw;

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

According to the above technical scheme, as shown in Figure 1, a mixing device for asphalt and asphalt mixture for laboratory use includes a frame, a heating pot 4 installed in the frame, a lifting mechanism and a driving device.

The frame is composed of a base 7 , a support plate 8 and a top plate 11 , a pair of support plates 8 are arranged in parallel on the base 7 , and the top plate 11 is fixed on the top of the support plate 8 . A heating pot 4 for stirring asphalt and asphalt mixture is arranged between the support plates 8. The heating pot 4 is a double-layer pot made of metal materials. There are electric heating tubes distributed between the two-layer pots. The power supply of the electric heating tubes can be connected. The material in the pot is heated. A pair of fixed shafts are fixed symmetrically on the sides of the heating pot 4, and a pair of bearings are fixed on the inner side of the support plate 8, and the fixed shafts are installed in the bearings, so that the heating pot 4 can rotate between the two support plates 8; A rotary handle 9 is arranged on the outer surface of the plate 8, and the rotary handle 9 passes through the support plate 8 and is connected with the fixed shaft, so that after the asphalt or the mixture in the heating pot 4 is stirred and heated, the rotary handle 9 can be turned to turn the heating pot 4 Tilt to pour out the material.

Lifting mechanism is realized by screw rod and sleeve 2. The lifting mechanism is mainly used to lift the pot cover 3 of the heating pot 4. The pot cover 3 is fixed with a lower screw 10, and the bottom surface of the top plate 11 is fixed with an upper screw 13. The upper screw 13 and the lower screw 10 are connected through the sleeve 2. The sleeve 2 is processed with an internal thread that cooperates with the upper screw 13 and the lower screw 10; when the heating pot 4 is working, rotate the sleeve 2 to lower the pot cover 3 to the heating pot 4 to prevent asphalt from splashing during stirring; after the stirring is completed The rotating sleeve 2 makes the pot cover 3 rise, and this lifting method also prevents the high temperature pot cover 3 from scalding the operator. When in use, the bottom surface of the pot cover 3 is coated with a layer of diesel oil to prevent splashed asphalt from sticking to the cover and should not be cleaned.

The heating pot 4 is provided with an agitator 6 for stirring and auxiliary heating of asphalt or asphalt mixture. The agitator 6 is a hollow agitator 6, including a pear-shaped inner ring agitating ring 62 and an outer ring agitating ring 61; the inner ring agitating ring 62 and the outer ring agitating ring 61 are bent by a hollow tube into a pear-shaped agitating ring , the end of the hollow tube is connected to different conduits 12 inside the rotating shaft 5; both the inner stirring ring and the outer stirring ring are symmetrical about the rotating shaft 5; as shown in the figure, the conduits 12 inside the rotating shaft 5 are divided into two types: the mark "+ "" represents the oil outlet pipe 122, and "-" represents the oil inlet pipe 121. The upper end of the rotating shaft 5 is connected to a heat pump. After the heat pump heats the heat transfer oil, it is pumped into the inner ring stirring ring 62 and the outer ring stirring ring 61, keep the high temperature state of the stirring ring.

Both the inner ring stirring ring 62 and the outer ring stirring ring 61 are provided with two, and the two outer ring stirring rings 61 are arranged vertically to each other. one, located on the angle bisector of two outer ring stirring rings 61, that is, the angle between any one inner ring stirring ring 62 and any one outer ring stirring ring 61 is 45°; During the process, the material is more evenly stirred.

Before the stirring device works, the upper part of the conduit 12 in the rotating shaft 5 is connected to the heat pump, and the high-temperature heat transfer oil is pumped out from the heat pump, and the heat transfer oil flows into the agitator 6 along the oil inlet pipe 121 inside the hollow rotating shaft 5, and continuously circulates , so that the agitator 6 is in a high-temperature state; the heat-conducting oil is heated to 200°C and pumped into the agitator 6 to make the inner and outer stirring rings reach the stirring temperature of asphalt (150-190°C). Then disconnect the heat pump, seal the internal conduit 12 of the rotating shaft 5, and keep the stirring ring not lower than the stirring temperature within the required stirring time (2-3 minutes). This method can better make the mixing ring meet the required mixing temperature requirements, and at the same time meet the experimental requirements for asphalt mixing in the "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering".

After the high-temperature heat transfer oil is pumped into the agitator 6, the upper end of the rotating shaft 5 is disconnected from the heat pump, and the motor 1 is quickly turned on for stirring. The stirring ring is made of heat-conducting metal. Because it is in a high temperature state during the stirring process, it can prevent the agitator 6 from sticking to asphalt and ensure the stirring quality and efficiency of the mixture.

While the agitator 6 is heating, it is also driven by the motor 1 to rotate at a high speed together with the rotating shaft 5. The motor 1 is arranged on the top of the top plate 11, on one side of the rotating shaft 5, and is connected with the rotating shaft 5 through a gear transmission pair to convert the torque in the horizontal direction into a vertical torque. torque in the straight direction.

The steps of the utility model stirring asphalt and its mixture are as follows:

1. Check the device, apply a layer of diesel oil on the bottom surface of the pot cover 3, and turn the rotary handle 9 to place the heating pot 4 in a tilted state;

2. Pour the asphalt baked in the oven and its admixture into the inclined heating pot 4, turn the handle to make the heating pot 4 in a vertical state, and then turn on the power supply of the electric heating tube of the heating pot 4 to heat the material;

3. Turn the sleeve 2, place the pot cover 3 on the pot, and make the heating pot 4 in a closed state;

4. Connect the upper end of the stirring shaft 5 to the heat pump, pump heat transfer oil at 200°C into the agitator 6 through the heat pump to heat the inner and outer stirring rings, and then disconnect the heat pump from the upper end of the shaft 5, Enclose the high-temperature heat transfer oil in the hollow agitator 6;

5. Turn on the power supply of motor 1 and heating pot 4, the stirring shaft 5 and agitator 6 start to work, and after the asphalt or mixture is fully stirred evenly, cut off the power supply of motor 1 and heating pot 4;

6. Turn the sleeve 2 in the opposite direction to lift the pot cover 3; turn the rotary handle 9 to tilt the heating pot 4, and take out the stirred asphalt or asphalt mixture.

Claims (6)

1. An asphalt and asphalt mixture mixing device for laboratory use, including a base (7), a support plate (8) arranged on the base (7), and a top plate (11) installed on the top of the support plate (8). It is characterized in that a pair of support plates (8) are arranged in parallel, a heating pot (4) is arranged between the support plates (8), and the heating pot (4) is fixed on the support plate ( 8) On the bearing on the side; the pot cover (3) is installed on the heating pot (4), and the upper end of the pot cover (3) is connected to the top plate (11) through a lifting mechanism; a stirrer (6) is set in the heating pot (4) , the stirrer (6) is installed on the lower end of the hollow shaft (5) passing through the top plate (11) and the pot cover (3), and the shaft (5) is driven by a motor (1) arranged above the top plate (11); stirring The device (6) is a hollow agitator (6) connected to the conduit (12) arranged inside the rotating shaft (5); the agitator (6) is filled with heat transfer oil, and the upper end of the rotating shaft (5) is connected to a heat pump. 2. The asphalt and asphalt mixture stirring device for laboratory use according to claim 1, characterized in that, the agitator (6) comprises a pear-shaped inner ring agitating ring (62) and an outer ring agitating ring (61) , there are two outer stirring rings (61) perpendicular to each other, two inner stirring rings (62), and the angle between any one inner stirring ring (62) and one outer stirring ring (61) is 45°; the inner ring stirring ring (62) and the outer ring stirring ring (61) are both composed of hollow tubes, and the two ends of the hollow tubes are respectively connected to different conduits (12) inside the rotating shaft (5). 3. The asphalt and asphalt mixture mixing device for laboratory use according to claim 1, characterized in that the heating pot (4) is a double-layer pot, and electric heating pipes are distributed between the double-layer pots. 4. The laboratory asphalt and asphalt mixture mixing device according to claim 1, characterized in that, the lifting mechanism includes a lower screw (10) fixed on the pot cover (3) and a lower screw (10) fixed on the top plate ( 11) The upper screw (13) on the bottom surface, the upper screw (13) and the lower screw (10) are connected through the sleeve (2), and the sleeve (2) is processed with the upper screw (13) and the lower screw (10). internal thread. 5. The laboratory asphalt and asphalt mixture mixing device according to claim 1, characterized in that the rotating shaft (5) is connected to the motor (1) through a gear transmission pair. 6. The asphalt and asphalt mixture mixing device for laboratory use according to claim 1, characterized in that a rotating handle (9) is provided on the side of the support plate (8), and the rotating handle (9) passes through the support plate (8) connected to a fixed shaft.