CN211440607U

CN211440607U - Accurate weighing device of additive

Info

Publication number: CN211440607U
Application number: CN201921845595.5U
Authority: CN
Inventors: 汪进国; 郭偲
Original assignee: Wuhan Pintai Special Building Materials Technology Co ltd
Current assignee: Wuhan Pintai Special Building Materials Technology Co ltd
Priority date: 2019-10-30
Filing date: 2019-10-30
Publication date: 2020-09-08
Anticipated expiration: 2029-10-30

Abstract

The utility model discloses an additive accurate weighing device, which comprises a weighing box, a weighing body, a feeding port and a discharging port, wherein a rotating shaft is arranged at the center inside the weighing box, one end of the rotating shaft is connected with a motor, a plurality of uniformly distributed blades are arranged on the rotating shaft, and each blade extends along the axial direction of the rotating shaft; an air pipe is arranged between the rotating shaft and the scale body, one end of the air pipe is positioned inside the scale box, the other end of the air pipe is communicated with the storage chamber, and an air suction pump is arranged on the air pipe. The device can prevent the damage of the symmetrical body caused by the admixture during free falling through the buffering force of the blades; meanwhile, when the required weighing weight is reached, the motor is stopped, the admixture on the blades is retained between the adjacent blades on the upper portion and cannot fall off, and the weighing precision of the admixture is guaranteed.

Description

Accurate weighing device of additive

Technical Field

The utility model belongs to the technical field of weighing device, specifically be an accurate weighing device of admixture.

Background

Whether the addition amount of the concrete admixture is accurate or not directly influences the production quality of concrete, the existing weighing device presets the using amount of the admixture, the weighing device monitors the amount of the admixture entering the device in the process that the admixture enters the weighing device, and when the weighing device monitors that the amount of the admixture reaches a preset value, the controller controls the inlet end to be closed and stops feeding. In the weighing process, the impact force of the admixture on the bottom of the weighing device under the action of the gravity when the admixture enters the weighing device is large, so that the instantaneous weight monitored by the weighing device is large, the controller controls the feed inlet to be closed according to the instantaneous weight, so that the difference between the actual weight of the admixture inside and outside the weighing device and the preset weight is large, the accuracy of the weighing device is low, and the performance of concrete is influenced; secondly, the admixture impacts the bottom of the weighing device for a long time, so that the weighing main body is easy to damage, and the service life is shortened.

The patent CN209027647U discloses an automatic weighing device for concrete admixture, which comprises a discharging buffer device, wherein the discharging buffer device comprises a buffer wheel which is arranged at the bottom of a lifting device and is used for buffering the impact force of the admixture; the circumference of the buffer wheel is uniformly provided with clapboards, and a chamber for containing falling additives is formed between every two adjacent clapboards. The admixture is gently dropped on the weighing body through the buffer wheel, so that the buffer effect is realized. When the required amount of the admixture is reached, the excess admixture still remains in the cavity on the side wall of the buffer wheel, and the admixture easily continues to fall down, so that the weighing device is inaccurate; and generally the weighing device is in the inside of equipment, when the admixture on the weighing device is too much, can't remove unnecessary admixture accurately.

Disclosure of Invention

The utility model aims at solving the problems in the prior art, and provides an additive accurate weighing device which can prevent the additive from continuously dropping when the required external dosage is reached and accurately weigh the additive; meanwhile, when the additive on the weighing device is excessive, the redundant additive can be accurately removed.

In order to achieve the above object, the utility model adopts the following technical scheme:

an additive accurate weighing device comprises a scale box, a scale body arranged at the bottom of the scale box, a feed inlet and a discharge outlet, wherein a rotating shaft is arranged at the center in the scale box, one end of the rotating shaft is connected with a motor, a plurality of uniformly distributed blades are arranged on the rotating shaft, and each blade extends along the axial direction of the rotating shaft; an air pipe is arranged between the rotating shaft and the scale body, one end of the air pipe is positioned inside the scale box, the other end of the air pipe is communicated with the storage chamber, and an air suction pump is arranged on the air pipe.

When the device is used, the motor is started, the blades start to rotate, the admixture is added from the feeding hole, the admixture falls between two adjacent blades for buffering when falling, the rotating shaft drives the blades to rotate so that the admixture falls, and the buffering force of the blades on the admixture can prevent the admixture from being damaged by a symmetrical body when falling freely; when the required weighed weight is reached, the motor is stopped, and the admixture on the blades is retained between the adjacent blades at the upper part and cannot fall off; when the additive is excessively added, the air suction pump is opened, redundant additive is sucked into the air pipe and is discharged into the storage chamber for reuse, and redundant additive in the weighing box is removed, so that the additive is accurately weighed.

Furthermore, one end of the air pipe is positioned in the weighing box and is also provided with an air suction head.

Furthermore, a vibrator is arranged on the outer side surface of the weighing box.

Furthermore, a fixed rod is arranged above the scale body and positioned between the rotating shaft and the air pipe, and a plurality of first guide plates inclining downwards are arranged on the fixed rod; the damage of the symmetrical body of the admixture falling without the buffering of the blade is prevented, and the second buffering force can be given to the admixture.

Further, the inclination of the first guide plate is 30-60 °.

Furthermore, a second guide plate which is the same as the first guide plate in structure is arranged on the fixed rod, and the first guide plate and the second guide plate are symmetrically arranged along the central axis of the weighing box.

Furthermore, a baffle plate which is inclined downwards is arranged between the fixed rod and the suction head; prevent the admixture from blocking the suction head.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model is provided with the blades along the axial direction of the rotating shaft, and the damage caused by the symmetrical body of the admixture during the free falling can be prevented through the buffering force of the blades; meanwhile, when the required weighing weight is reached, the motor is stopped, the admixture on the blades is retained between the adjacent blades on the upper portion and cannot fall off, and the weighing precision of the admixture is guaranteed.

(2) The utility model discloses the device is through being equipped with suction head and trachea, can get rid of unnecessary additive in the title case, makes the additive weigh more accurately, reduces experimental error.

(3) The device is provided with the first guide plate, prevents the symmetrical body of the admixture from being damaged because the upper part of the symmetrical body of the admixture does not fall through the buffering of the blade, and can also give a second buffering force to the admixture.

Drawings

FIG. 1 is a front view of an admixture precision weighing apparatus according to example 1;

FIG. 2 is a right side view of an admixture precision weighing apparatus according to example 1;

FIG. 3 is a front view of an admixture precision weighing apparatus according to embodiment 2;

FIG. 4 is a right side view of an admixture precision weighing apparatus according to example 2;

in the figure: 1. weighing a box; 2. weighing a body; 3. a feed inlet; 4. a discharge port; 5. a rotating shaft; 6. a motor; 7. a blade; 8. fixing the rod; 9. a first guide plate; 10. an air tube; 11. an air suction head; 12. a storage chamber; 13. an air pump; 14. a second guide plate; 15. a vibrator; 16. and a baffle plate.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example 1

The accurate admixture weighing device shown in fig. 1-2 comprises a scale box 1 and a scale body 2 arranged at the bottom of the scale box 1, wherein the scale body 2 is a ring-shaped gravity sensor, a feed inlet 3 arranged at the top end of the scale box 1 and a discharge outlet 4 arranged at the bottom end of the scale box 1, the feed inlet 3 and the discharge outlet 4 are both provided with electromagnetic valves (the electromagnetic valves are in the prior art and are not marked in the figure), a rotating shaft 5 is arranged at the center inside the scale box 1, one end of the rotating shaft 5 is connected with a motor 6, the rotating shaft 5 is provided with a plurality of uniformly distributed blades 7, and each blade 7 extends along the axial direction of the rotating shaft 5; an air pipe 10 is arranged between the rotating shaft 5 and the scale body 2, one end of the air pipe 10 is located inside the scale box 1, the other end of the air pipe 10 is communicated with a storage chamber 12, and an air suction pump 13 is arranged on the air pipe 10.

More preferably, an air suction head 11 is provided at one end of the air pipe 10 inside the weighing box 1.

More preferably, a vibrator 15 is provided on the outer side surface of the scale box 1.

The working principle of the device is as follows: the motor 6 is started, the blades 7 start to rotate, the admixture is added from the feeding hole 3, the admixture falls between two adjacent blades 7 when falling, the rotating shaft 5 drives the blades 7 to rotate so that the admixture falls, and the buffer force of the blades 7 on the admixture can prevent the admixture from being damaged by the symmetrical body 2 when falling freely; when the required weighed weight is reached, the motor 6 is stopped, and the admixture on the blades 7 is retained between the adjacent blades 7 at the upper part and cannot fall off; when the additive is excessively added, the air suction pump 13 is opened, the air suction head sucks the additive into the air pipe, the additive is discharged into the storage chamber 12 for reuse, and redundant additive in the weighing box 1 is removed, so that the additive is accurately weighed. After weighing is finished, the electromagnetic valve at the discharge port 4 is opened, the vibrator is started, so that the admixture falls down from the center of the weighing body 2, and the discharging is complete.

Example 2

As shown in fig. 3-4, embodiment 2 differs from embodiment 1 in that a fixing rod 8 is disposed above the scale body 2, the fixing rod 8 is disposed between the rotating shaft 5 and the air pipe 10, and a plurality of first guide plates 9 inclined downward are disposed on the fixing rod 8; the fixed rod 8 is also provided with a second guide plate 14 with the same structure as the first guide plate 9, and the first guide plate 9 and the second guide plate 14 are symmetrically arranged along the central axis of the weighing box 1; the inclination of the first guide plate 9 is 60 °; a baffle 16 which is inclined downwards is arranged between the fixed rod 8 and the suction head 11. The rest of the apparatus was the same as in example 1.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An additive accurate weighing device comprises a weighing box (1), a weighing body (2) arranged at the bottom of the weighing box (1), a feeding hole (3) and a discharging hole (4), and is characterized in that a rotating shaft (5) is arranged at the center of the inside of the weighing box (1), one end of the rotating shaft (5) is connected with a motor (6), a plurality of uniformly distributed blades (7) are arranged on the rotating shaft (5), and each blade (7) extends along the axial direction of the rotating shaft (5); an air pipe (10) is arranged between the rotating shaft (5) and the scale body (2), one end of the air pipe (10) is located inside the scale box (1), the other end of the air pipe (10) is communicated with the storage chamber (12), and an air suction pump (13) is arranged on the air pipe (10).

2. The admixture precision weighing apparatus according to claim 1, wherein one end of the air pipe (10) is provided with a suction head (11) inside the weighing box (1).

3. The admixture precision weighing apparatus according to claim 1, wherein the outer side of said scale box (1) is provided with a vibrator (15).

4. The accurate admixture weighing device according to any one of claims 1 to 3, wherein a fixing rod (8) is provided above the scale body (2), the fixing rod (8) is located between the rotating shaft (5) and the air pipe (10), and a plurality of first guide plates (9) inclined downwards are provided on the fixing rod (8).

5. The admixture precision weighing apparatus according to claim 4, wherein the inclination of said first guide plate (9) is 30-60 °.

6. The admixture precision weighing device according to claim 4, characterized in that the fixing rod (8) is further provided with a second guide plate (14) having the same structure as the first guide plate (9), and the first guide plate (9) and the second guide plate (14) are symmetrically arranged along the central axis of the weighing box (1).

7. The admixture accurate weighing apparatus according to claim 4, wherein a baffle (16) is provided between the fixing rod (8) and the suction head (11) in an inclined downward direction.