Bidirectional powder conveying mechanism of concrete mixing plant

Abstract

The utility model belongs to the technical field of concrete mixing plants, and particularly relates to a bidirectional powder conveying mechanism of a concrete mixing plant. Comprising a powder bin, a main butterfly valve is installed at the discharging end of the powder bin, the discharging end of the powder bin is connected with a main spiral conveyor, the main spiral conveyor is communicated with a connecting pipe, the other end of the connecting pipe is communicated with an auxiliary spiral conveyor, an auxiliary butterfly valve is installed on the connecting pipe, and the output end of the main spiral conveyor is connected with a first stirring station. And the output end of the auxiliary screw conveyor is connected with the second mixing station. According to the utility model, one powder bin can be used for conveying powder to two mixing stations, and two discharge ports and two sets of arch breaking systems do not need to be arranged on the powder bin, so that the waiting time for conveying the powder is reduced, and the utilization rate of the powder bin is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of concrete mixing plants, and particularly relates to a two-way powder conveying mechanism for a concrete mixing plant. Background Technique

[0002] At present, some concrete production users share a powder silo between two stations. Since the screw conveyor is for one-way single-station conveying, the powder silo needs to be provided with two discharge ports, and two screw conveyors are respectively installed at the two discharge ports and sent to each station. Moreover, two sets of arch-breaking systems are required for the two discharge ports. If one of the devices is not used for a long time, the materials at the discharge port of the powder silo of this device cannot be used in time, and even problems such as caking may occur, affecting the subsequent use of the device. If the screw conveyor can convey powder in two directions, the materials in the silo can be fully utilized. Summary of the Invention

[0003] The purpose of the utility model is to provide a two-way powder conveying mechanism for a concrete mixing plant to solve the problems existing in the prior art.

[0004] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0005] A two-way powder conveying mechanism for a concrete mixing plant includes a powder silo. A main butterfly valve is installed at the discharge end of the powder silo. A main screw conveyor is connected to the discharge end of the powder silo. A connecting pipe is communicated with the main screw conveyor. The other end of the connecting pipe is communicated with a secondary screw conveyor. A secondary butterfly valve is installed on the connecting pipe. The output end of the main screw conveyor is connected to the first mixing station, and the output end of the secondary screw conveyor is connected to the second mixing station.

[0006] Further, the feeding end of the main screw conveyor is located below the feeding end of the secondary screw conveyor. One end of the connecting pipe is communicated with the bottom of the feeding end of the main screw conveyor, and the other end of the connecting pipe is communicated with the feeding port of the secondary screw conveyor.

[0007] Further, a vibrator is installed on the outer wall of the feeding end of the main screw conveyor.

[0008] The utility model has the following beneficial effects:

[0009] 1. The utility model can convey powder from one powder silo to two mixing stations, without the need to set two discharge ports and two sets of arch-breaking systems on the powder silo, reducing the waiting time for powder conveying and improving the utilization rate of the powder silo.

[0010] 2. By connecting a connecting pipe and a secondary butterfly valve between the feeding ends of the main screw conveyor and the secondary screw conveyor, separate feeding or simultaneous feeding to the two mixing stations can be realized, and the operation flexibility is strong.

[0011] 3. Compared with the bidirectional screw conveyor in the prior art, the utility model can adjust the output angles and heights of the main screw conveyor and the auxiliary screw conveyor according to the powder inlet positions of the two mixing stations, so it has stronger adaptability.

[0012] 4. By installing a vibrator at the feeding end of the main screw conveyor, it can prevent the powder from getting stuck at the feeding end of the main screw conveyor when the auxiliary screw conveyor operates alone. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural view of the utility model.

[0014] Figure 2 is a schematic top view structural view of the utility model.

[0015] Wherein: 1. powder bin; 2. main screw conveyor; 3. main butterfly valve; 4. auxiliary screw conveyor; 5. auxiliary butterfly valve; 6. first mixing station; 7. second mixing station; 8. vibrator; 9. connecting pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] In order to make the purpose, technical solutions and advantages of the utility model clearer, the following further describes the utility model in detail with reference to specific embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0017] As Figure 1-2 shown, a bidirectional powder conveying mechanism for a concrete mixing station includes a powder bin 1. A main butterfly valve 3 is installed at the discharging end of the powder bin 1. The discharging end of the powder bin 1 is connected to a main screw conveyor 2. A connecting pipe 9 is communicated with the main screw conveyor 2. The other end of the connecting pipe 9 is communicated with an auxiliary screw conveyor 4. An auxiliary butterfly valve 5 is installed on the connecting pipe 9. The output end of the main screw conveyor 2 is connected to a first mixing station 6, and the output end of the auxiliary screw conveyor 4 is connected to a second mixing station 7.

[0018] The feeding end of the main screw conveyor 2 is located below the feeding end of the auxiliary screw conveyor 4. One end of the connecting pipe 9 is communicated with the bottom of the feeding end of the main screw conveyor 2, and the other end of the connecting pipe 9 is communicated with the feeding port of the auxiliary screw conveyor 4. The connecting pipe 9 is used to communicate the feeding ends of the main screw conveyor 2 and the auxiliary screw conveyor 4, so as to achieve the purpose of supplying two screw conveyors from one powder bin 1.

[0019] A vibrator 8 is installed on the outer wall of the feeding end of the main screw conveyor 2. When feeding powder to the second mixing station 7 alone, the main screw conveyor 2 is not started, and the screw shaft of the main screw conveyor 2 will form a certain obstructive effect on the falling of the powder. In order to prevent material jamming, the vibrator 8 is started to vibrate the powder accumulated on the screw shaft of the main screw conveyor 2 into the auxiliary screw conveyor 4.

[0020] The working principle of the present utility model is as follows:

[0021] When delivering powder to the first mixing station 6 alone, the main butterfly valve 3 is opened and the auxiliary butterfly valve 5 is closed. The powder falls from the powder bin 1 into the main screw conveyor 2, and after the main screw conveyor 2 starts, the powder is transported into the first mixing station 6.

[0022] When delivering powder to the second mixing station 7 alone, the main butterfly valve 3 and the auxiliary butterfly valve 5 are opened. The powder falls from the powder bin 1 to the feeding end of the main screw conveyor 2. Since the connecting pipe 9 is connected to both the main screw conveyor 2 and the auxiliary screw conveyor 4, the powder falls from the connecting pipe 9 to the feeding end of the auxiliary screw conveyor 4. After the auxiliary screw conveyor 4 starts, the powder is transported into the second mixing station 7. Since the main screw conveyor 2 is not started, the screw shaft of the main screw conveyor 2 will form a certain obstructive effect on the falling of the powder. In order to prevent material jamming, the vibrator 8 is started, so as to vibrate the powder accumulated on the screw shaft of the main screw conveyor 2 into the auxiliary screw conveyor 4.

[0023] When delivering powder to the first mixing station 6 and the second mixing station 7 simultaneously, the main butterfly valve 3 and the auxiliary butterfly valve 5 are opened, and both the main screw conveyor 2 and the auxiliary screw conveyor 4 are started. The powder falls from the powder bin 1 to the feeding end of the main screw conveyor 2. Part of the powder is transported by the main screw conveyor 2 to the first mixing station 6, and the other part of the powder falls from the connecting pipe 9 to the feeding end of the auxiliary screw conveyor 4. Since the main screw conveyor 2 is started, the powder will not get stuck at the feeding end of the main screw conveyor 2, so there is no need to start the vibrator 8.

[0024] In the prior art, there is also a bidirectional screw conveyor that can convey materials in two directions, but it can only convey in two opposite directions, that is, convey in two opposite directions on the same axis. However, the powder inlets of the current double mixing stations are not necessarily set in two directions at the same height, and the present utility model can adjust the output angles and heights of the main screw conveyor 2 and the auxiliary screw conveyor 4 according to the powder inlet positions of the two mixing stations, so the adaptability is stronger.

[0025] The above-described embodiments merely describe the preferred embodiments of the present utility model, and do not limit the concept and scope of the present utility model. Without departing from the design concept of the present utility model, various modifications and improvements made by those of ordinary skill in the art to the technical solutions of the present utility model shall fall within the protection scope of the present utility model.

[0026] The technologies, shapes, and structures not described in detail in the present utility model are all well-known technologies.

Claims

1. A two-way powder conveying mechanism for a concrete mixing station, characterized in that, It includes a powder silo. A main butterfly valve is installed at the discharge end of the powder silo. The discharge end of the powder silo is connected to a main screw conveyor. A connecting pipe is communicated with the main screw conveyor. The other end of the connecting pipe is communicated with a secondary screw conveyor. A secondary butterfly valve is installed on the connecting pipe. The output end of the main screw conveyor is connected to the first mixing station, and the output end of the secondary screw conveyor is connected to the second mixing station.

2. The powder two-way conveying mechanism of the concrete mixing plant according to claim 1, characterized in that The feed end of the main screw conveyor is located below the feed end of the secondary screw conveyor. One end of the connecting pipe is communicated with the bottom of the feed end of the main screw conveyor, and the other end of the connecting pipe is communicated with the feed inlet of the secondary screw conveyor.

3. The two-way powder conveying mechanism of the concrete mixing plant according to claim 1, characterized in that, A vibrator is installed on the outer wall of the feed end of the main screw conveyor.

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