Spraying regulation and control method based on running speed of conveying belt

Abstract

The invention relates to a spraying regulation and control method based on the running speed of a conveying belt, which comprises the following steps: arranging a belt speed sensor around the belt, and detecting the running speed of the belt in a contact or non-contact manner; belt upper mist spray is arranged over the belt, the mist spray direction is perpendicular to the belt, and mist only covers the belt area; full-section spraying is arranged on a roadway top plate, the spraying direction is vertically downward, and spraying covers the whole roadway section; the spraying above the belt is controlled by a spraying electromagnetic valve above the belt on the water path, and the full-section spraying is controlled by a full-section spraying electromagnetic valve on the water path; the running speed of the conveying belt is detected through the belt speed sensor, and the spraying mode is automatically adjusted and controlled according to the running speed of the conveying belt. Through regulation and control of the method, spraying can fully wet the coal flow surface and inhibit dust flying during low-speed operation of the belt, dust diffusion can be prevented and air in a roadway can be purified during high-speed operation of the belt, and the method is economical and applicable.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine dust prevention and control, and relates to a spray control method based on the running speed of a conveyor belt. Background Art

[0002] Belt conveying is a major dust-generating process in underground coal mines. Long transport distances, fine dust particles, and severe pollution are the result. Belt spraying is the most common dust reduction measure. This spray arrangement increases the surface humidity of the coal flow by spraying directly above the belt, thereby suppressing the rise of dust. Control methods include automatic start and stop detection of the belt's start and stop, or the presence of coal flow on the belt via a touch sensor.

[0003] In the actual production process, the transport belt speed needs to be adjusted according to the size of the coal flow. When the belt speed is high, the wind disturbance and mechanical vibration will intensify, the amount of dust will increase, and at the same time, the contact time between the spray and the coal flow surface will be reduced, the degree of wetting will be insufficient, and the dust will easily pollute the entire tunnel. Due to the fine particle size, it is difficult to settle for a long time. At this time, full-section spraying is required to purify the diffused dust.

[0004] However, existing spraying methods all adopt fixed patterns and cannot achieve automatic adjustment of the spraying according to the speed of the conveyor belt. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to solve the dust control problem of the conveyor belt and provide a spray control method based on the running speed of the conveyor belt.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A spray control method based on the running speed of a conveyor belt comprises: a belt speed sensor is arranged around the belt to detect the running speed of the belt by means of contact or non-contact with the belt; an above-belt spray is arranged directly above the belt, with the spray direction perpendicular to the belt and covering only the belt area; a full-section spray is arranged on the roadway roof, with the spray direction vertically downward and covering the entire roadway cross-section; the above-belt spray is controlled by an above-belt spray solenoid valve on the waterway, and the full-section spray is controlled by a full-section spray solenoid valve on the waterway;

[0008] The running speed of the conveyor belt is detected by the belt speed sensor, and the spray mode is automatically adjusted according to the running speed of the conveyor belt.

[0009] Furthermore, when the belt runs at a low speed, it is regulated to spray above the belt, and when the belt runs at a high speed, it is regulated to spray over the entire section.

[0010] Furthermore, when the belt running speed is 0, the spray is not turned on; when the speed is ≤3m / s, only the spray above the belt is turned on; when the speed is >3m / s, the spray above the belt and the full-section spray are turned on at the same time.

[0011] The beneficial effects of the present invention are:

[0012] (1) Improve dust reduction efficiency: When the transport belt runs at a fast speed, the contact time between the spray above the belt and the coal flow surface is short, the coal flow surface is not fully wetted, and the dust diffusion is serious. The full-section spray is controlled to open according to the belt speed, which has a good purification effect on the dust diffused in the tunnel, and improves the dust reduction efficiency compared with the spray above the belt.

[0013] (2) Save water resources: Select the appropriate spray mode according to the belt running speed. When the belt speed is low, only open the spray above the belt. It is more conducive to saving water resources than using full-section spray throughout the process.

[0014] (3) Improve the working environment: The method of regulating the spray based on the speed of the conveyor belt improves the capture of diffused dust on the one hand, and avoids the sewage discharge problem caused by long-term use of full-section spray on the other hand, making the working environment cleaner.

[0015] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below with reference to the accompanying drawings, in which:

[0017] Figure 1 Schematic diagram of the device for the spray control method based on the running speed of the conveyor belt in the present invention;

[0018] Figure 2 for Figure 1 side view.

[0019] Figure 3 This is a control logic diagram of the spray control method based on the running speed of the conveyor belt in the present invention.

[0020] Reference numerals: 1-belt speed sensor; 2-above-belt spray; 3-full-section spray; 4-above-belt spray solenoid valve; 5-full-section spray solenoid valve. DETAILED DESCRIPTION

[0021] The following describes the embodiments of the present invention by means of specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0022] Among them, the accompanying drawings are only for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting the present invention. In order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the dimensions of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the accompanying drawings.

[0023] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0024] See also Figures 1 to 3 It is a spray control method based on the running speed of the conveyor belt. The belt speed sensor 1 is arranged around the belt to detect the running speed of the belt by contacting or non-contacting the belt; the above-belt spray 2 is arranged directly above the belt, and the spray direction is perpendicular to the belt; the full-section spray is arranged on the roadway roof, and the spray direction is vertically downward; the above-belt spray solenoid valve 4 and the full-section spray solenoid valve 5 are installed on two branches of the water channel, supplying water for the above-belt spray and the full-section spray respectively.

[0025] When the conveyor belt is stationary, the belt speed sensor 1 detects that the speed is 0 and no action occurs; when the conveyor belt starts to move, the belt speed sensor 1 detects that the speed is not 0, and at this time the speed is detected to be ≤3m / s, the spray solenoid valve 4 above the belt is turned on, and the spray 2 above the belt is opened; when the conveyor belt accelerates, the belt speed sensor 1 detects that the speed is >3m / s, and the full-section spray solenoid valve 5 is turned on, and the full-section spray 3 is opened.

[0026] When the belt is decelerated, the belt speed sensor 1 detects that the speed is ≤3m / s, the full-section spray solenoid valve 5 is disconnected, and the full-section spray 3 is closed. At this time, only the spray 2 above the belt is opened; when the belt continues to decelerate, the belt speed sensor 1 detects that the speed is 0, the spray solenoid valve 4 above the belt is disconnected, and all sprays are closed.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions, which should all be included in the scope of the claims of the present invention.

Claims

1. A spray control method based on the running speed of a conveyor belt, characterized in that: Belt speed sensors are arranged around the belt to detect the belt running speed by contacting or non-contacting the belt; belt-above spray is arranged directly above the belt, with the spray direction perpendicular to the belt and the spray only covering the belt area; full-section spray is arranged on the top plate of the tunnel, with the spray direction vertically downward and the spray covering the entire tunnel section; belt-above spray is controlled by the belt-above spray solenoid valve on the waterway, and full-section spray is controlled by the full-section spray solenoid valve on the waterway; The running speed of the conveyor belt is detected by the belt speed sensor, and the spray mode is automatically adjusted according to the running speed of the conveyor belt.

2. The spray control method based on the running speed of the conveyor belt according to claim 1 is characterized in that: When the belt runs at a low speed, it is adjusted to spray above the belt. When the belt runs at a high speed, it is adjusted to spray on the entire section.

3. The spray control method based on the running speed of the conveyor belt according to claim 2 is characterized in that: When the belt running speed is 0, the spray is not turned on. When the speed is ≤3m / s, only the spray above the belt is turned on. When the speed is greater than 3m / s, the spray above the belt and the full-section spray are turned on at the same time.

Images