阅读说明：本技术 一种皮带转载点半封闭式自动降尘装置及自动降尘方法 (Semi-closed automatic dust falling device and method for belt transfer point ) 是由 张炳林 司俊鸿 赵红星 王海东 谢明亮 王明 崔瑞清 李永超 孙超 于 2019-11-01 设计创作，主要内容包括：本发明涉及一种皮带转载点半封闭式自动降尘装置,包括半封闭式防尘罩,半封闭式防尘罩中部设有上部皮带,下部设有下部搭接皮带,半封闭式防尘罩的开口处设有泡沫起膜密封装置；该泡沫起膜密封装置通过设在半封闭式防尘罩内的泡沫材料注入管道与泡沫注入泵连通；半封闭式防尘罩内部设有多个气水喷雾装置、瓦斯浓度监测传感器、粉尘浓度监测传感器；瓦斯浓度监测传感器和粉尘浓度监测传感器与控制器的输入端电连接,控制器与泡沫起膜密封装置和气水喷雾装置电连接；使用半封闭式装置,可以有效吹散和稀释受限空间中的瓦斯浓度,通过顶部出口排出瓦斯有害气体,防止瓦斯在密闭空间中的积聚,同时能够对粉尘进行有效的处理。(The invention relates to a semi-closed automatic dust-settling device with a belt transfer point, which comprises a semi-closed dust cover, wherein an upper belt is arranged in the middle of the semi-closed dust cover, a lower lapping belt is arranged at the lower part of the semi-closed dust cover, and a foam film-forming sealing device is arranged at an opening of the semi-closed dust cover; the foam film-forming sealing device is communicated with the foam injection pump through a foam material injection pipeline arranged in the semi-closed dust cover; a plurality of gas-water spraying devices, gas concentration monitoring sensors and dust concentration monitoring sensors are arranged in the semi-closed dust cover; the gas concentration monitoring sensor and the dust concentration monitoring sensor are electrically connected with the input end of the controller, and the controller is electrically connected with the foam film-forming sealing device and the gas spray device; use semi-enclosed device, can effectively blow off and dilute the gas concentration in the confined space, through top export discharge gas harmful gas, prevent the gathering of gas in airtight space, can carry out effectual processing to the dust simultaneously.)

1. The belt transfer point semi-closed automatic dust falling device comprises a semi-closed dust cover (1), wherein an upper belt (9) for coal to enter the semi-closed dust cover (1) is arranged in the middle of the semi-closed dust cover (1), a lower lapping belt (5) for coal to be transported out of the semi-closed dust cover (1) is arranged at the lower part of the semi-closed dust cover, the upper belt (9) is perpendicular to the lower lapping belt (5), and the coal on the upper belt (9) falls onto the lower lapping belt (5), and the belt transfer point semi-closed automatic dust falling device is characterized in that a foam film lifting sealing device (12) for forming a foam film at an opening is arranged at the opening of the semi-closed dust cover (1);

a plurality of air water spraying devices (2) for spraying air or water in the semi-closed dust cover (1), a gas concentration monitoring sensor (3) for monitoring the gas concentration in the semi-closed dust cover (1) and a dust concentration monitoring sensor (4) for detecting the dust concentration in the semi-closed dust cover (1) are arranged in the semi-closed dust cover (1);

the output ends of the gas concentration monitoring sensor (3) and the dust concentration monitoring sensor (4) are electrically connected with the input end of the controller through a monitoring data interface (7), and the output end of the controller is electrically connected with the foam film-forming sealing device (12) and the gas spray device (2) respectively.

2. The semi-closed automatic dust-settling device for the belt transfer points of claim 1, wherein an upper belt washing and spraying device (10) is arranged between the lower carrying belt (5) and the upper belt (9), and the upper belt washing and spraying device (10) is communicated with the air-water spraying pipeline (8).

3. The belt transfer point semi-closed automatic dust-settling device as claimed in claim 1, wherein the open position of the semi-closed dust cover (1) is arranged at the top of the semi-closed dust cover (1), and the foam stripping sealing device (12) is arranged at the opening of the semi-closed dust cover (1).

4. The automatic semi-closed dust-settling device for the belt transfer points of claim 1 is characterized in that the upper part of the semi-closed dust cover (1) is provided with an inclined part inclined towards the top of the semi-closed dust cover (1), the inclined part is positioned at the tail end of an upper belt (9) and is opposite to the wind direction, and the air water spraying device (2) is uniformly arranged on the inclined part of the semi-closed dust cover (1).

5. The automatic semi-closed dust-settling device for the belt transfer points of claim 1, wherein belt sealing rubber baffles (11) are arranged at the junctions of the semi-closed dust-proof cover (1) and the upper belt (9) and the lower carrying belt (5) respectively.

6. The automatic dust falling device with the belt transfer point semi-closed type as claimed in claim 1 or 3, wherein the foam rise sealing device (12) comprises a plurality of foam blowing ports (1201) uniformly arranged at the opening of the semi-closed type dust cover (1), the foam blowing ports (1201) are communicated with the foam box (1202) through foam material injection pipelines (6) in the semi-closed type dust cover (1), an air blowing pump (1203) for blowing foam in the foam box (1202) into the foam blowing ports is arranged on the foam material injection pipelines (6), and the air blowing pump (1203) is electrically connected with the controller.

7. The belt transshipment point semi-closed automatic dust-settling device according to claim 1 or 2, wherein the air-water spraying device (2) is fixedly provided with an air-water nozzle (201) in the semi-closed dust cover (1), the air-water nozzle (201) is communicated with the water storage tank (202) through an air-water spraying pipeline (8), the air-water spraying pipeline (8) is provided with an electromagnetic valve (203), a water pump (204) and a blower (205), and the electromagnetic valve (203), the water pump (204) and the blower (205) are respectively and electrically connected with a controller.

8. The semi-closed automatic dust settling device for the belt transfer points according to any one of claims 1 to 5 provides an automatic dust settling method, which is characterized by comprising the following steps of:

the method comprises the following steps: pre-cleaning, starting an upper belt (9), a lower carrying belt (5) and an air-water pump; the gas-water spraying device (2) and the upper washing and spraying device (10) clean the reserved dust on the upper belt (9) and the lower carrying belt (5);

step two: forming a closed space: after the automatic dust falling device is pre-cleaned, a foam film-forming sealing device (12) is opened to form a sealing foam layer, and a semi-closed dust cover (1) forms a sealed space;

step three: data monitoring: the coal is conveyed into the semi-closed dust cover (1) by the upper belt (9), and when the coal reaches the tail end of the upper belt (9), the coal falls onto the lower carrying belt (5) and is conveyed out, and in the coal conveying process, the gas concentration monitoring sensor (3) and the dust concentration monitoring sensor (4) detect the gas concentration and the dust concentration in the semi-closed dust cover (1);

step four: gas treatment: the gas concentration monitoring sensor (3) sends monitored data to the controller, when the gas concentration exceeds a set gas concentration threshold value, the controller controls the foam stripping sealing device (12) to be closed, and simultaneously controls the gas-water spraying device (2) to increase the gas spraying flow rate and reduce the concentration of gas in the semi-closed dust cover (1), when the concentration of the gas concentration is reduced to be below the set gas concentration threshold value, the controller controls the foam stripping sealing device (12) to be opened, and the semi-closed dust cover (1) forms a sealed space newly;

step five: and (3) dust treatment: the dust concentration monitoring sensor (4) sends the monitored data to the controller, when the dust concentration exceeds a set threshold value, the controller controls the air-water spraying device (2) to add the spraying flow, and when the data monitored by the dust concentration monitoring sensor (4) is not continuously increased or decreased, the spraying flow of the air-water spraying device (2) is decreased.

Technical Field

The invention relates to the technical field of dust treatment, in particular to a semi-closed automatic dust falling device and an automatic dust falling method for a belt transfer point.

Background

The underground coal mine is limited by production conditions, and a large amount of dust is generated in the processes of mining, tunneling, belt coal conveying, transferring, support moving and other operations. The dust of colliery is mainly rock dust and coal dust, and its harm is very big, not only pollutes the workplace, endangers human health, causes pneumoconiosis and dermatosis, can accelerate machine wear moreover, shortens the live time of precision instrument, reduces the visibility of workplace, makes the industrial injury increase, and in addition, the dust probably explodes under certain condition, causes the incident. Therefore, the prevention and control of underground dust is one of important contents for guaranteeing the safe production of coal mines.

The belt conveyer is one of the important equipments in the coal mine production operation. The underground needs a plurality of belts to run together due to the limits of belt transportation capacity, roadway intersection and turning, and the belt transfer point is an important connection point in belt transportation operation. The coal body mainly depends on the coal body self gravity to fall into the overlap joint belt at the belt transshipment point, causes the dust concentration of this department higher, is the main source of tunnel dust.

The current main measures for treating coal mine underground dust comprise: coal seam water injection, spray dust settling, dust removal by a dust remover, foam dust removal, purified water curtain dust control and the like, relevant technical measures are reasonably selected, and underground dust concentration can be effectively reduced. However, for dust control at the belt transfer position, dust produced by coal breakage is isolated by mainly sealing the transfer area and using a dust cover. The dust concentration in the limited space is easily overhigh by using a sealing measure, and for a high gas mine, the problem of gas accumulation in the upper space is easily caused after the gas analyzed in the coal body escapes from the transferring point closed space, so that the safety production of a coal mine is seriously influenced.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a semi-closed automatic dust settling device and an automatic dust settling method for a belt transfer point, wherein the dust concentration and gas concentration monitoring data adopt a method of combining automatic spraying and top foam sealing in the device to settle dust, gas and dust accidents are prevented, and the dust concentration near the transfer point of a roadway is reduced on the premise of ensuring the production safety.

In order to achieve the purpose, the invention adopts the following technical scheme that the belt transfer point semi-closed automatic dust falling device comprises a semi-closed dust cover, wherein an upper belt for coal to enter the semi-closed dust cover is arranged in the middle of the semi-closed dust cover, a lower lapping belt for coal to be transported out of the semi-closed dust cover is arranged at the lower part of the semi-closed dust cover, the upper belt is vertical to the lower lapping belt, the coal on the upper belt falls onto the lower lapping belt, and a foam film lifting sealing device for forming a foam film at the opening is arranged at the opening of the semi-closed dust cover;

a plurality of air-water spraying devices for spraying air or water in the semi-closed dust cover, a gas concentration monitoring sensor for monitoring the gas concentration in the semi-closed dust cover and a dust concentration monitoring sensor for detecting the dust concentration in the semi-closed dust cover are arranged in the semi-closed dust cover;

the output ends of the gas concentration monitoring sensor and the dust concentration monitoring sensor are electrically connected with the input end of the controller through monitoring and monitoring data interfaces, and the output end of the controller is electrically connected with the foam film-forming sealing device and the gas spray device respectively.

An upper belt washing and spraying device is arranged between the lower carrying belt and the upper belt and is communicated with the gas-water spraying pipeline.

The opening position of the semi-closed dust cover is arranged at the top of the semi-closed dust cover, and the foam film-forming sealing device is arranged at the opening of the semi-closed dust cover.

The upper portion of semi-enclosed dust cover is equipped with the slope to the top slope of semi-enclosed dust cover, and this slope is located the terminal wind direction that just faces of upper portion belt, air water atomizer evenly establishes on the slope of semi-enclosed dust cover.

And belt sealing rubber baffles are arranged at the joint of the semi-closed dust cover and the upper belt and the lower carrying belt respectively.

The foam film sealing device comprises a plurality of foam blowing ports which are uniformly arranged at the opening of the semi-closed dust cover, the foam blowing ports are communicated with the foam box through foam material injection pipelines in the semi-closed dust cover, a blowing pump which blows foam in the foam box into the foam blowing ports is arranged on the foam material injection pipelines, and the blowing pump is electrically connected with the controller.

The air-water spraying device is fixedly arranged on an air-water nozzle in the semi-closed dust cover, the air-water nozzle is communicated with the water storage tank through an air-water spraying pipeline, the air-water spraying pipeline is provided with an electromagnetic valve, a water pump and a blower, and the electromagnetic valve, the water pump and the blower are respectively and electrically connected with the controller.

A semi-closed automatic dust settling method for a belt transfer point comprises the following steps:

the method comprises the following steps: pre-cleaning, starting an upper belt, and starting a lower carrying belt and an air-water pump; the gas-water spraying device and the upper washing spraying device clean the dust reserved on the upper belt and the lower carrying belt;

step two: forming a closed space: after the automatic dust falling device is pre-cleaned, opening a foam film-forming sealing device to form a sealing foam layer, and forming a semi-closed dust cover into a sealed space;

step three: data monitoring: the coal is conveyed into the semi-closed dust cover by the upper belt, falls onto the lower carrying belt and is conveyed out when the coal reaches the tail end of the upper belt, and the gas concentration monitoring sensor and the dust concentration monitoring sensor detect the gas concentration and the dust concentration in the semi-closed dust cover in the coal conveying process;

step four: gas treatment: the gas concentration monitoring sensor sends monitored data to the controller, when the gas concentration exceeds a set gas concentration threshold, the controller controls the foam film forming sealing device to be closed, and simultaneously controls the gas-water spraying device to increase the gas spraying flow and reduce the concentration of gas in the semi-closed dust cover, when the concentration of the gas concentration is reduced to be lower than the set gas concentration threshold, the controller controls the foam film forming sealing device to be opened, and the semi-closed dust cover forms a sealed space newly;

step five: and (3) dust treatment: the dust concentration monitoring sensor sends the monitored data to the controller, when the dust concentration exceeds a set threshold value, the controller controls the air-water spraying device to add the spraying flow, and when the data monitored by the dust concentration monitoring sensor is not continuously increased or reduced, the spraying flow of the air-water spraying device is reduced.

The invention has the beneficial effects that: when the gas concentration is higher, a gas pipeline in the gas-water device is used to achieve the purpose of pressurization, the gas concentration in the limited space can be effectively blown away and diluted, harmful gas in the gas is discharged through a top outlet, and the gas is prevented from accumulating in the closed space; in addition, set up a portion foam at the top and play membrane closing device, then play the purpose of airtight space when gas concentration is less, and can effectively remove dust, isolated dust propagation route.

Drawings

FIG. 1 is a schematic side view of the present invention;

FIG. 2 is a side view of the present invention;

FIG. 3 is a schematic front view of the present invention;

FIG. 4 is a schematic of the structure in the foam rise seal of the present invention;

FIG. 5 is a schematic structural view of an air-water spraying device according to the present invention;

FIG. 6 is a schematic structural diagram of a gas-water nozzle in the embodiment of the present invention;

FIG. 7 is a block diagram of the electrical connections of the present invention;

FIG. 8 is a schematic flow diagram of the dust removal method of the present invention.

Detailed Description

The invention is described in detail below with reference to the figures and examples.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.