CN217331834U - Device for preparing saturated surface dry fine aggregate - Google Patents

Abstract

The utility model discloses a device for preparing dry fine aggregate of saturated surface belongs to test equipment technical field. The device includes frame, aircraft bonnet and hair-dryer, be equipped with the stirring subassembly on the frame, the aircraft bonnet can be dismantled with the frame and be connected, the inboard of aircraft bonnet is equipped with the screen cloth, and the top of aircraft bonnet is equipped with a plurality of ventilation hole, the hair-dryer passes through tuber pipe and aircraft bonnet connection, and the air outlet of tuber pipe extends to the inboard of screen cloth. The moisture evaporated by the sample is discharged from the vent hole at the top of the hood after being filtered by the screen, and the powder is intercepted by the screen, so that a large amount of powder is prevented from being blown out of the hood, and the accuracy of the test result is improved. The sample is stirred by the stirring assembly, and the air is supplied by the blower to accelerate the evaporation of water on the surface of the sample, so that the preparation time of the dry fine aggregate on the saturated surface is short, and the efficiency is high; the device can select a manual mode or an automatic mode to prepare the dry and fine aggregate of the saturated surface, and is flexible and convenient to use and simple to operate.

Description

Device for preparing saturated surface dry fine aggregate

Technical Field

The utility model relates to a device for preparing dry fine aggregate of saturated surface belongs to test equipment technical field.

Background

For hydraulic concrete, the aggregate in a saturated surface dry state is taken as a reference when the mixing proportion is calculated. The preparation of the aggregate in the saturated dry-face state directly influences the water absorption of the aggregate, and in a roller compacted concrete mixing ratio test, if the error of a measured water absorption value is large, the water consumption of the roller compacted concrete is directly increased, the using amount of a cementing material is increased, the cost is increased, and especially for fine aggregates, the preparation of the aggregate in the saturated dry-face state is very important.

Chinese patent publication No. CN214438109U discloses a fine aggregate saturated surface dry sample blow dryer, which includes: the device comprises a main body, a stirring device, a blow-drying device and a control device; the main body is provided with an accommodating space for accommodating fine aggregate and a fine aggregate inlet and outlet; the stirring device is connected with the main body; the stirring device can stir the fine aggregate in the accommodating space; the blow-drying device is connected with the main body; the blow-drying device can blow air into the accommodating space; the control device is electrically connected with the stirring device and the blow-drying device. The fine aggregate in the accommodation space of the main body is dried by the drying device, the fine aggregate is stirred by the stirring device in the drying process, the stirring is uniform, the water evaporation on the aggregate surface is more uniform, and the fine aggregate saturated surface dry sample with the determined state can be obtained.

However, in the process of preparing the saturated surface dry fine aggregate, the blow-drying device easily blows away a large amount of powder in the accommodating space from the second vent on the main body, so that the accuracy of the test result is greatly reduced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a device for preparing the dry fine aggregate of saturated surface.

The utility model discloses a following technical scheme can realize:

the utility model provides a device for preparing dry fine aggregate of saturation surface, includes frame, aircraft bonnet and hair-dryer, be equipped with the stirring subassembly on the frame, the aircraft bonnet can be dismantled with the frame and be connected, the inboard of aircraft bonnet is equipped with the screen cloth, and the top of aircraft bonnet is equipped with a plurality of ventilation hole, the hair-dryer passes through tuber pipe and aircraft bonnet connection, and the air outlet of tuber pipe extends to the inboard of screen cloth.

The machine base is provided with a discharge hole.

The stirring assembly comprises a stirring motor and a stirring shaft, the stirring motor is arranged in the base, one end of the stirring shaft is connected with an output shaft of the stirring motor, and a plurality of stirring blades are uniformly distributed on the outer circular surface of the stirring shaft.

And the stirring switch and the stirring speed regulating switch are arranged on the machine base and are electrically connected with the stirring motor.

The lower extreme opening of aircraft bonnet, the upper end is sealed, and the upper end of aircraft bonnet is equipped with a plurality of ventilation holes, the lower extreme opening of screen cloth to be connected with the inner wall of aircraft bonnet.

The aperture of the screen is 0.05-0.075 mm.

The air outlet of the air pipe is connected with a duckbill-shaped flat nozzle.

And the hair drier is provided with a three-gear selector switch and an air volume adjusting switch.

Still include humidity transducer and controller, humidity transducer establishes in the aircraft bonnet, controller and humidity transducer, stirring subassembly and hair-dryer electric connection.

The beneficial effects of the utility model reside in that:

1. the moisture evaporated by the sample is discharged from the vent hole at the top of the hood after being filtered by the screen, and the powder is intercepted by the screen, so that a large amount of powder is prevented from being blown out of the hood, and the accuracy of the test result is improved.

2. The sample is stirred by the stirring assembly, and the air is supplied by the blower to accelerate the evaporation of water on the surface of the sample, so that the preparation time of the dry fine aggregate on the saturated surface is short, and the efficiency is high;

3. the device can select a manual mode or an automatic mode to prepare the dry and fine aggregate of the saturated surface, and has flexible and convenient use and simple operation.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic front view of the engine base and the engine cover of the present invention;

FIG. 3 is a schematic top view of the structure of FIG. 2;

fig. 4 is a schematic top view of the hood of the present invention;

fig. 5 is a schematic front view of the screen of the present invention;

FIG. 6 is a schematic top view of the duckbill flat nozzle of the present invention;

figure 7 is a schematic perspective view of a duckbill flat nozzle of the present invention.

In the figure: the method comprises the following steps of 1-a machine base, 11-a stirring switch, 12-a stirring speed regulation switch, 13-a stirring blade, 14-a discharge port, 2-a machine cover, 21-a vent hole, 22-a screen, 3-a blower, 31-a duckbill-shaped flat nozzle, 32-an air pipe, 33-a three-gear selection switch and 34-an air volume adjusting switch.

Detailed Description

The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.

As shown in fig. 1 to 7, a device for preparing saturation surface dry and fine aggregate, including frame 1, aircraft bonnet 2 and hair-dryer 3, install the stirring subassembly on the frame 1, aircraft bonnet 2 can be dismantled with frame 1 and be connected, screen cloth 22 is installed to the inboard of aircraft bonnet 2, and the top processing of aircraft bonnet 2 has a plurality of ventilation holes 21, hair-dryer 3 is connected with aircraft bonnet 2 through tuber pipe 32, and the air outlet of tuber pipe 32 extends to the inboard of screen cloth 22. When in use, the hood 2 can be connected with the base 1 through a buckle. In the process of preparing the dry fine aggregate of the saturated surface, the sample is stirred through the stirring assembly, the air is supplied through the blower 3 to accelerate the evaporation of the moisture on the surface of the sample, the preparation time of the dry fine aggregate of the saturated surface is short, the efficiency is high, the evaporated moisture is filtered by the screen 22 and then is discharged from the vent hole 21, the powder is intercepted through the screen 22, a large amount of powder is prevented from being blown to the outside of the hood 2, and the accuracy of a test result is improved.

A discharge port 14 is formed in the machine base 1. When the test stand is used, the top of the stand 1 is provided with a sample accommodating groove.

The stirring subassembly includes agitator motor and (mixing) shaft, and agitator motor installs in frame 1, and the one end of (mixing) shaft and agitator motor's output shaft, and the equipartition is installed a plurality of stirring vane 13 on the outer disc of (mixing) shaft.

The stirring switch 11 and the stirring speed regulating switch 12 are installed on the machine base 1, and the stirring switch 11 and the stirring speed regulating switch 12 are both electrically connected with the stirring motor. The stirring motor is controlled to start and stop through the stirring switch 11, the rotating speed of the stirring motor is controlled through the stirring speed regulating switch 12, and the rotating speed range of the stirring motor is 60-300 r/min.

The lower extreme opening of aircraft bonnet 2, the upper end is sealed, and the upper end processing of aircraft bonnet 2 has a plurality of ventilation holes 21, and the lower extreme opening of screen cloth 22 to be connected with the inner wall of aircraft bonnet 2.

The aperture of the screen 22 is 0.05-0.075 mm.

The air outlet of the air pipe 32 is connected with a duckbilled flat nozzle 31.

The blower 3 is provided with a three-gear selection switch 33 and an air quantity adjusting switch 34. When the hair dryer is used, the hair dryer 3 comprises an air duct, an electric heating wire, a motor and fan blades arranged on the motor, the motor drives the rotor to drive the fan blades to rotate, when the fan blades rotate, air is sucked from the air inlet, and centrifugal airflow formed by the air is blown out from the front nozzle of the air duct. When the air passes through, if the heating wires on the heating bracket in the air nozzle are electrified to become hot, hot air is blown out; if the three-stage selection switch 33 does not energize the heating wire to generate heat, cold air is blown out. The three-gear selector switch 33 is divided into three gears, namely, a closing gear, a cold wind gear and a hot wind gear, and the air volume adjusting switch 34 is a speed adjusting switch and is electrically connected with the motor for controlling the rotating speed of the motor so as to achieve the purpose of controlling the air volume. The blower 3 is prior art and will not be described in detail herein.

Still include humidity transducer and controller, humidity transducer installs in aircraft bonnet 2, controller and humidity transducer, stirring subassembly and 3 electric connection of hair-dryer. When the electric heating type hair drier is used, the controller is electrically connected with the stirring motor through the frequency converter A, is electrically connected with the electric heating wire in the hair drier 3, and is electrically connected with the motor in the hair drier 3 through the frequency converter B.

A device for preparing dry fine aggregate of saturation surface, its theory of operation or use as follows:

after the sample is soaked for 24 hours, the clean water on the upper part of the sample is carefully poured out, then the sample is poured into the engine base 1, and the hood 2 is installed on the engine base 1.

Manual mode: the stirring motor is started through the stirring switch 11, the stirring motor drives the stirring shaft and the stirring blades 13 to rotate so as to stir the sample, and the rotating speed of the stirring motor can be adjusted through the stirring speed adjusting switch 12; the three-gear selection switch 33 is used for controlling the blower 3 to output hot air into the hood 2 so as to accelerate the evaporation of moisture on the surface of the sample, and the air volume adjusting switch 34 is used for adjusting the rotating speed of a motor in the blower 3 so as to further adjust the air volume; the evaporated moisture is discharged to the outside of the hood 2 through the screen 22 and the vent holes 21 at the top of the hood 2. After the sample reaches the saturated surface dry state, the blower 3 and the stirring motor are closed, and the sample is taken out from the discharge hole 14 to carry out the water absorption test of the densimeter.

Automatic mode: set for the sample through the controller and reach 2 inside humidity values of aircraft bonnet when the saturation surface is dry, then the controller starts agitator motor and drives (mixing) shaft and stirring vane 13 and rotate to stir the sample, and start hair-dryer 3 and supply hot-blast to aircraft bonnet 2 is inside, in order to accelerate sample surface moisture evaporation, stirring speed is slowed down by fast becoming, and the wind speed of hair-dryer 3 is by big diminishing. Meanwhile, the humidity inside the hood 2 is detected through a humidity sensor, when the actual humidity value inside the hood 2 is not larger than the humidity value set by the controller, the fact that the sample reaches a saturation surface dry state is indicated, the controller closes the blower 3 and the stirring motor, and then the sample is taken out from the discharge hole 14 to be subjected to a densimeter water absorption test.

The utility model provides a device for preparing dry fine aggregate of saturated surface has following beneficial effect:

1. the moisture evaporated by the sample is discharged from the vent hole 21 at the top of the hood 2 after being filtered by the screen 22, and the powder is intercepted by the screen 22, so that a large amount of powder is prevented from being blown out of the hood 2, and the accuracy of the test result is improved.

2. The sample is stirred by the stirring assembly, and the air is supplied by the blower 3 to accelerate the evaporation of water on the surface of the sample, so that the preparation time of the dry fine aggregate on the saturated surface is short, and the efficiency is high;

3. the device can select a manual mode or an automatic mode to prepare the dry and fine aggregate of the saturated surface, and is flexible and convenient to use and simple to operate.

Claims (9)

1. A device for preparing saturated surface dry fine aggregate is characterized in that: including frame (1), aircraft bonnet (2) and hair-dryer (3), be equipped with the stirring subassembly on frame (1), aircraft bonnet (2) can be dismantled with frame (1) and be connected, the inboard of aircraft bonnet (2) is equipped with screen cloth (22), and the top of aircraft bonnet (2) is equipped with a plurality of ventilation hole (21), hair-dryer (3) are connected with aircraft bonnet (2) through tuber pipe (32), and the air outlet of tuber pipe (32) extends to the inboard of screen cloth (22).

2. The apparatus for producing saturated surface dry fine aggregate according to claim 1, wherein: the machine base (1) is provided with a discharge hole (14).

3. The apparatus for making saturated surface dry fine aggregate according to claim 1, wherein: the stirring assembly comprises a stirring motor and a stirring shaft, the stirring motor is arranged in the base (1), one end of the stirring shaft is connected with an output shaft of the stirring motor, and a plurality of stirring blades (13) are uniformly distributed on the outer circular surface of the stirring shaft.

4. The apparatus for producing saturated surface dry fine aggregate according to claim 3, wherein: the stirring machine is characterized in that a stirring switch (11) and a stirring speed regulating switch (12) are arranged on the machine base (1), and the stirring switch (11) and the stirring speed regulating switch (12) are electrically connected with a stirring motor.

5. The apparatus for making saturated surface dry fine aggregate according to claim 1, wherein: the lower end of the hood (2) is open, the upper end of the hood (2) is sealed, and a plurality of vent holes (21) are formed in the upper end of the hood (2); the lower end of the screen (22) is open and is connected with the inner wall of the hood (2).

6. The apparatus for producing saturated surface dry fine aggregate according to claim 1 or 5, wherein: the aperture of the screen (22) is 0.05-0.075 mm.

7. The apparatus for making saturated surface dry fine aggregate according to claim 1, wherein: the air outlet of the air pipe (32) is connected with a duckbill flat nozzle (31).

8. The apparatus for making saturated surface dry fine aggregate according to claim 1, wherein: the blower (3) is provided with a three-gear selector switch (33) and an air quantity adjusting switch (34).

9. The apparatus for making saturated surface dry fine aggregate according to claim 1, wherein: still include humidity transducer and controller, humidity transducer establishes in aircraft bonnet (2), controller and humidity transducer, stirring subassembly and hair-dryer (3) electric connection.

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