阅读说明：本技术 螺旋溜槽堵塞自动冲水疏通装置和方法 (Automatic flushing dredging device and method for blockage of spiral chute ) 是由 李鹏波 孙永新 赵维英 申迎松 杨洋 张泽飞 王炎红 于 2020-06-12 设计创作，主要内容包括：本发明公开了螺旋溜槽堵塞自动冲水疏通装置和方法,包括螺旋溜槽,振动筛,气动控制单元、电源、堵煤传感单元和冲水疏通单元；气动控制单元包括连接有气源的中块控制阀、小块控制阀,所述堵煤传感单元包括中块堵煤传感器和小块堵煤传感器,并分别连接有中块控制阀和小块控制阀；所述冲水疏通单元包括第一水管和第二水管,第一水管和第二水管连接有水源,第一水管的出口位于振动筛的入料口处,第二水管的出口位于螺旋溜槽易堵塞点上方；所述第一水管和第二水管上分别设置有中块气动阀和小块气动阀,中块气动阀和小块气动阀连接中块控制阀和小块控制阀；该装置结构简单,避免物料堆积和洒落地面,减小岗位工劳动强度。(The invention discloses an automatic flushing dredging device and method for blockage of a spiral chute, which comprises the spiral chute, a vibrating screen, a pneumatic control unit, a power supply, a coal blockage sensing unit and a flushing dredging unit, wherein the pneumatic control unit is connected with the power supply; the pneumatic control unit comprises a middle block control valve and a small block control valve which are connected with an air source, and the coal blockage sensing unit comprises a middle block coal blockage sensor and a small block coal blockage sensor which are respectively connected with the middle block control valve and the small block control valve; the flushing dredging unit comprises a first water pipe and a second water pipe, the first water pipe and the second water pipe are connected with a water source, an outlet of the first water pipe is positioned at a feeding port of the vibrating screen, and an outlet of the second water pipe is positioned above a point of easy blockage of the spiral chute; the first water pipe and the second water pipe are respectively provided with a middle pneumatic valve and a small pneumatic valve, and the middle pneumatic valve and the small pneumatic valve are connected with a middle control valve and a small control valve; the device simple structure avoids material pile and unrestrained ground, reduces post worker intensity of labour.)

1. The automatic flushing dredging device for the blockage of the spiral chute comprises the spiral chute (4), wherein a vibrating screen (6) is arranged at an inlet of the spiral chute (4), and the automatic flushing dredging device is characterized by further comprising a pneumatic control unit (2), a power supply (5), a coal blockage sensing unit (1) and a flushing dredging unit (3);

the pneumatic control unit (2) comprises a middle block control valve (21) and a small block control valve (22), wherein the middle block control valve (21) and the small block control valve (22) are respectively connected with an air source (24) through a valve front air pipe (23);

the coal blockage sensing unit (1) comprises a middle block coal blockage sensor (11) and a small block coal blockage sensor (12), the middle block coal blockage sensor (11) is arranged on the inner wall of the vibrating screen (6), and the small block coal blockage sensor (12) is arranged at a point of a spiral chute, which is easy to block; the middle block coal blockage sensor (11) and the small block coal blockage sensor (12) are both connected with a power supply (5), the middle block coal blockage sensor (11) is connected with a middle block control valve (21) through a control line (13), and the small block coal blockage sensor (12) is connected with a small block control valve (22) through the control line (13);

the flushing dredging unit (3) comprises a first water pipe (31) and a second water pipe (32), inlets of the first water pipe and the second water pipe are both connected with a water source (36), an outlet of the first water pipe is located at a feed inlet of the vibrating screen (6), and an outlet of the second water pipe is located above a point which is easy to block of the spiral chute; the first water pipe (31) and the second water pipe (32) are respectively provided with a middle pneumatic valve (33) and a small pneumatic valve (34), and the middle pneumatic valve (33) and the small pneumatic valve (34) are respectively connected with a middle control valve (21) and a small control valve (22) through a valve rear air pipe (35).

2. The spiral chute blockage automatic flushing dredging device as recited in claim 1, wherein a booster pump (37) is arranged on each of the first water pipe (31) and the second water pipe (32).

3. The spiral chute blockage automatic flushing dredging device as recited in claim 1, wherein the outlet of the first water pipe (31) is provided with a first spray head (38), and the first spray head is provided with a plurality of spray holes (39), and the spray holes face to different directions and all face to the vibrating screen;

and a second spray head (40) is arranged at the outlet of the second water pipe (32), a plurality of spray holes (39) are arranged on the second spray head, the spray holes positioned at the center face the center of the easy-to-block point of the spiral chute, and the spray holes positioned at the periphery face the area range of the easy-to-block point of the spiral chute.

4. The spiral chute blockage automatic flushing dredger according to claim 1, characterized in that the small coal blockage sensor (12) is arranged on the inner side wall of the easy blockage point of the spiral chute (4).

5. The spiral chute blockage automatic flushing dredging device as claimed in claim 1, wherein the medium block control valve (21) and the small block control valve (22) are both two-position three-way electromagnetic valves.

6. The automatic flushing dredging method for the blockage of the spiral chute is characterized in that when the vibrating screen or the spiral chute is blocked, materials are accumulated, so that a coal blockage sensor acts to send a coal blockage signal which is transmitted to a control valve of a pneumatic control unit, the control valve changes the trend of a gas path to drive a control actuator of the pneumatic valve to act, the pneumatic valve is opened, and water flows out from a pipeline outlet of a water pipe at a high speed to a feeding end of the vibrating screen or a point of easy blockage of the spiral chute to wash and dredge;

when the vibrating screen or the spiral chute is not blocked, the coal blockage sensor automatically resets, no coal blockage signal exists, the air path in the control valve recovers the original trend, the control actuator of the pneumatic valve recovers the original state, and the pneumatic valve is closed to stop flushing and dredging.

Technical Field

The invention belongs to the technical field of coal preparation transportation equipment, and particularly relates to an automatic flushing dredging device and method for blockage of a spiral chute.

Background

In the anthracite market, lump coal has greater economic benefit than slack coal, so improving the lump rate and reducing the lump coal limit rate are important measures for improving the lump coal quality. In the process of transporting coal materials, the fall of part of transferring links is large, when the materials are transferred to the next device through a common chute, the acceleration is large, the material end speed is large, the coal blocks or the coal blocks and the chute are easy to collide with each other to cause crushing, the block rate is reduced, the limit rate of the coal blocks is increased, and the quality of the coal blocks is seriously influenced. In order to effectively improve the lump coal rate and reduce the lump coal limit rate, a spiral chute is installed in part of key transfer links of a coal preparation plant, after passing through a feeding section and an accelerating section, materials enter a standard section, the materials are balanced under the combined action of self gravity, friction force between the materials and chute panels and centripetal force, no acceleration is generated in the operation speed, the materials stably operate to the next link at a lower constant speed, the collision degree between coal blocks is reduced, and the lump coal quality is effectively improved.

Although the quality of lump coal is improved after the spiral chute is operated, a series of problems exist in operation due to the influence of design factors and other objective factors of the spiral chute: (1) due to design factors, the end speed of the material in the acceleration section in a part of spiral chutes does not reach the standard, so that the centripetal force of the standard section is insufficient, and the material is easy to block in the spiral operation process; (2) during the material transportation process, collision among lump coals is inevitably caused, and under the condition that the lump coal limit is formed at the inner side of the spiral chute, the motion characteristic of the materials in the chute is influenced, and the blockage is easy to occur; (3) the process adjustment is not timely or the control is not in place, so that the material control index is not in place, for example, the medium removal effect of the material on a lump coal vibrating screen is poor, a large amount of medium powder is adhered to the lump coal material, the friction between the material and a chute is increased, the motion characteristic of the material is changed, and the blockage is easy to occur.

Because workshop personnel are limited, the post worker patrols and examines the region extensively, can't realize that the key link is whole to stare at the tip on the spot, in case take place to block up, can't discover in time, cause more material to block up, spill ground, spill volume more than ten tons when serious, not only increased post worker intensity of labour, probably caused equipment damage in addition, seriously influenced normal production.

Disclosure of Invention

The invention overcomes the defects of the prior art, provides the automatic flushing dredging device and the automatic flushing dredging method for the blockage of the spiral chute, and the device has a simple structure, avoids material accumulation and floor scattering, and reduces the labor intensity of post workers.

In order to achieve the purpose, the invention is realized by the following technical scheme:

the automatic flushing dredging device for the blockage of the spiral chute comprises the spiral chute, a vibrating screen, a pneumatic control unit, a power supply, a coal blockage sensing unit and a flushing dredging unit, wherein the vibrating screen is arranged at an inlet of the spiral chute;

the pneumatic control unit comprises a middle block control valve and a small block control valve, and the middle block control valve and the small block control valve are respectively connected with an air source through a valve front air pipe;

the coal blockage sensing unit comprises a middle coal blockage sensor and a small coal blockage sensor, the middle coal blockage sensor is arranged on the inner wall of the vibrating screen, and the small coal blockage sensor is arranged at a point of the spiral chute, which is easy to block; the middle block coal blockage sensor and the small block coal blockage sensor are both connected with a power supply, the middle block coal blockage sensor is connected with a middle block control valve through a control line, and the small block coal blockage sensor is connected with a small block control valve through a control line;

the flushing dredging unit comprises a first water pipe and a second water pipe, inlets of the first water pipe and the second water pipe are both connected with a water source, an outlet of the first water pipe is positioned at a feed inlet of the vibrating screen, and an outlet of the second water pipe is positioned above a point of easy blockage of the spiral chute; the first water pipe and the second water pipe are respectively provided with a middle pneumatic valve and a small pneumatic valve, and the middle pneumatic valve and the small pneumatic valve are respectively connected with a middle control valve and a small control valve through a valve rear air pipe; the first water pipe and the second water pipe are both provided with booster pumps;

a first spray head is arranged at an outlet of the first water pipe, a plurality of spray holes are formed in the first spray head, and the spray holes face different directions and all face the vibrating screen;

a second spray nozzle is arranged at the outlet of the second water pipe, and spray holes on the second spray nozzle face to easy-to-block points of the spiral chute;

the second nozzle is provided with a plurality of spray holes, the spray holes in the center face the center of the easy-to-block points of the spiral chute, and the spray holes around the second nozzle face the area range of the easy-to-block points of the spiral chute.

The small coal blockage sensor is arranged on the inner side wall of the easy blockage point of the spiral chute.

The middle block control valve and the small block control valve are two-position three-way electromagnetic valves.

Compared with the prior art, the invention has the following beneficial effects:

the device avoids material accumulation and floor scattering, and reduces the labor intensity of post workers; the chute can be automatically dredged in time, so that the normal discharge of materials in the chute is guaranteed, the fault influence time is reduced, and the normal production is guaranteed; the phenomenon of material accumulation is avoided, and the equipment can be effectively prevented from being blocked and damaged by materials.

Drawings

Fig. 1 is a schematic structural diagram of an apparatus in embodiment 1 of the present invention.

Fig. 2 is a schematic structural view of a flush unblocking unit in the apparatus according to embodiment 1 of the present invention.

FIG. 3 is a schematic diagram of the positions of small coal blockage sensors in the device in embodiment 1 of the invention.

FIG. 4 is a schematic diagram of the position of a block coal blockage sensor in the device according to example 1 of the present invention.

Fig. 5 is a schematic structural diagram of a second showerhead in the apparatus according to embodiment 1 of the present invention.

FIG. 6 is a schematic diagram of the position of a nozzle in the device according to embodiment 1 of the present invention.

The device comprises a coal blockage sensing unit 1, a pneumatic control unit 2, a flushing dredging unit 3, a spiral chute 4, a power supply 5, a vibrating screen 6, a middle coal blockage sensor 11, a small coal blockage sensor 12, a control line 13, a small control valve 21, a middle control valve 22, a front air pipe 23, an air source 24, a first water pipe 31, a second water pipe 32, a middle pneumatic valve 33, a small pneumatic valve 34, a rear air pipe 35, a water source 36, a booster pump 37, a first spray head 38, a spray hole 39 and a second spray head 40.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solution of the present invention is described in detail below with reference to the embodiments and the drawings, but the scope of protection is not limited thereto.