Flushing system for accumulated return coal at telescopic tail of scraper conveyor

Abstract

The utility model discloses a flushing system for accumulated return coal at the telescopic tail of a scraper conveyor. According to the device, a bottom plate and a middle plate are arranged at the position of a telescopic machine tail, the bottom plate is fixed, the middle plate moves under the action of a telescopic oil cylinder, and a coal return cover is arranged at the tail of the telescopic machine tail and used for cleaning accumulated coal; side plates are arranged between the bottom plate and the middle plate and arranged on the two sides of the bottom plate. The water source connector, the spherical stop valve, the filter and the spray head are sequentially connected through a pipeline; and more than three nozzles are arranged on the side plates at intervals, face the space between the bottom plate and the middle plate, incline towards the interior of the telescopic tail, incline towards the direction of the coal return cover and incline downwards. According to the utility model, accumulated return coal between the middle plate and the bottom plate can be washed, softened and lubricated, so that the return coal is convenient to clean, the operation resistance of the scraper is reduced, and the normal operation of equipment is ensured.

Description

Technical Field

[0001] The utility model relates to the field of scraper conveyors, and particularly relates to a flushing system for accumulated coal return in the telescopic tail of a scraper conveyor. Background Art

[0002] In the fully-mechanized coal mining face underground in coal mines, the scraper conveyor is one of the main equipment in the fully-mechanized coal mining face. During the working process, its load size constantly changes with the influence of factors such as the coal mining speed of the shearer and the pushing of the support, and the scraper chain also becomes loose or tight accordingly. The telescopic tail, as the main component of the scraper conveyor, can realize the adjustment of the chain tension at any time, effectively reduce the number of chain cutting operations of the scraper conveyor in the working face, save the labor of workers, and improve work efficiency.

[0003] The currently widely used telescopic tail of the scraper conveyor consists of a fixed frame and a movable frame. The two ends of the oil cylinder are respectively connected to the fixed frame and the movable frame, and the telescopic movement of the movable frame is driven by the telescopic of the oil cylinder. The fixed frame is the bottom plate, and the movable frame is the middle plate. However, during the operation and use of the equipment, the situation of pulling back coal inevitably exists, resulting in a large amount of coal accumulation between the middle plate and the bottom plate of the tail. This not only increases the running resistance of the scraper, causing energy loss, but also may cause the middle and bottom plates and the coal return cover to be extruded and deformed if not handled in time, resulting in the obstruction of the telescopic tail operation and affecting the normal operation of the equipment. If the coal is directly handled without flushing, the coal blocks have various shapes and large friction, making the cleaning difficult and the efficiency extremely low. Summary of the Invention

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and propose a flushing system for accumulated coal return in the telescopic tail of a scraper conveyor, which can flush, soften and lubricate the accumulated coal return between the middle plate and the bottom plate, facilitate the cleaning of the coal return, and further reduce the running resistance of the scraper to ensure the normal operation of the equipment.

[0005] To achieve the above purpose, the utility model proposes the following technical solutions:

[0006] A flushing system for the accumulated return coal of the telescopic tail of a scraper conveyor, comprising a spray head, a filter, a ball stop valve, and a water source connector. At the telescopic tail, there is a bottom plate and a middle plate. The bottom plate is fixed, and a slide rail is arranged on the bottom plate. The middle plate moves along the slide rail under the action of a telescopic oil cylinder. A return coal cover is provided at the tail of the telescopic tail for cleaning the accumulated coal. A side plate is arranged between the bottom plate and the middle plate, and the side plates are arranged on both sides of the bottom plate. The water source connector is connected to a water source, and the water source connector, the ball stop valve, the filter, and the spray head are sequentially connected through pipelines. The ball stop valve is the switch of the flushing system, and the filter filters the water source. There are more than three spray heads, which are arranged on the side plates at intervals. The spray heads face the space between the bottom plate and the middle plate, and the spray heads are inclined towards the inside of the telescopic tail, towards the return coal cover, and downwards, so that the return coal has a tendency to move towards the return coal cover, facilitating cleaning.

[0007] Preferably, the setting angles of each spray head are the same.

[0008] Preferably, the setting angles of each spray head are different.

[0009] Preferably, as the spray heads get closer to the return coal cover one by one, the inclination angles of the spray heads towards the inside of the telescopic tail become smaller one by one, and the downward inclination angles become smaller or larger one by one, forming a more comprehensive and multi-level flushing surface for the accumulated return coal, further optimizing the flushing effect on the return coal.

[0010] Preferably, the water source connector is connected to the water source through a high-pressure pump, so that the water sprayed by the spray head is high-pressure water. The pressure of the high-pressure water can be adjusted by adjusting the pressure of the high-pressure pump. The high-pressure water can form a certain impact force and driving force on the return coal, prompting the return coal to move towards the return coal cover, which helps the subsequent treatment of the return coal. The pipeline between the water source connector and the spray head adopts a high-pressure pipeline, and the filter adopts a high-pressure filter, thereby stabilizing the flushing effect.

[0011] Preferably, there are three spray heads, namely the first spray head, the second spray head, and the third spray head.

[0012] Preferably, the inward inclination angles of the first spray head, the second spray head, and the third spray head are 50 - 60°, 30 - 40°, and 20 - 30° respectively, and the downward inclination angles are 20 - 30°, 30 - 40°, and 50 - 60° respectively, further optimizing the flushing effect.

[0013] Preferably, the flushing system further includes two three-way connectors, namely a first three-way connector and a second three-way connector; the water source connector is provided with more than two interfaces, one of which is connected to the water source and the other is connected to a ball valve; the ball valve is connected to the second three-way connector through a filter, and the other two interfaces of the second three-way connector are respectively connected to the third spray head and the first three-way connector, and the two connectors of the first three-way connector are respectively connected to the first spray head and the second spray head, forming a water supply system for the first spray head, the second spray head and the third spray head.

[0014] Preferably, solenoid valves are respectively provided between the first spray head and the first three-way connector, between the second spray head and the first three-way connector, and between the third spray head and the second three-way connector, namely a first solenoid valve, a second solenoid valve and a third solenoid valve, for separately controlling the first spray head, the second spray head and the third spray head; the flushing system is further provided with a PLC controller, and the output end of the PLC controller is connected to the first solenoid valve, the second solenoid valve and the third solenoid valve, directly controlling the start and stop of the first solenoid valve, the second solenoid valve and the third solenoid valve. The operator only needs to input commands to the PLC controller according to the coal accumulation situation, so as to flexibly adjust the use of the spray heads, thereby realizing the remote control of the spray heads, making it more intelligent and protecting the operators.

[0015] The method for the PLC controller to control the solenoid valve mentioned above is already existing in the prior art, and those skilled in the art are capable of directly using it.

[0016] Specifically, the spray heads are sequentially installed on the side plates. The water source connector is connected to a dedicated flushing pipeline, or can also be connected to the water pipe for cooling the motor and the reducer. By adjusting the opening and closing state of the ball valve, the spray heads can be turned on or off. After the spray heads are turned on, the water flow flushes and softens the accumulated coal, and then the coal return cover is opened to clean the coal, greatly reducing the cleaning difficulty.

[0017] The beneficial effects of the present utility model are as follows:

[0018] By arranging spray heads on the side plates and connecting the spray heads to the water source, the present utility model forms a flushing system for the accumulated coal, which can flush, soften and lubricate the coal accumulated between the middle plate and the bottom plate, facilitating the cleaning of the coal, thereby reducing the running resistance of the scraper and ensuring the normal operation of the equipment.

[0019] There are more than three spray heads in the present utility model, which are inclined towards the inside of the telescopic tail, towards the coal return cover, and simultaneously downwards, making the coal have a tendency to move towards the coal return cover, which is more convenient for cleaning; as the spray heads gradually approach the coal return cover, the inclination angle of the spray heads towards the inside of the telescopic tail gradually becomes smaller, and the downward inclination angle gradually becomes larger, forming a more comprehensive and multi-level flushing surface for the accumulated coal, optimizing the flushing treatment effect of the coal.

[0020] In the present utility model, a high-pressure pump is arranged between the nozzle and the water source, so that the water sprayed by the nozzle is high-pressure water, which forms a certain impact force and driving force on the returned coal, promotes the returned coal to move towards the coal return hood, and optimizes the cleaning effect of the returned coal.

[0021] In the present utility model, a solenoid valve is arranged on the nozzle to form independent control of the nozzle. At the same time, the PLC controller is used to start and stop the solenoid valve of the nozzle to form remote control, which is more intelligent and protects the operators.

[0022] Adopting the above scheme, the present utility model can wash and soften the accumulated returned coal between the middle plate and the bottom plate, facilitate the cleaning of the returned coal, and further reduce the running resistance of the scraper, ensuring the normal operation of the equipment. Brief Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following-described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 It is a schematic installation diagram of the nozzle on the telescopic tail of the machine.

[0025] Figure 2 It is a water supply pipeline diagram of the flushing system.

[0026] Figure 3 It is a distribution diagram of the nozzles in the second embodiment.

[0027] Figure 4 It is a control diagram of the flushing system in the fifth embodiment.

[0028] Figure 5 It is a water supply pipeline diagram of the third embodiment.

[0029] In the figure, 1-bottom plate, 2-middle plate, 3-side plate, 4-nozzle, 41-first nozzle, 42-second nozzle, 43-third nozzle, 51-second tee joint, 52-filter, 53-ball shut-off valve, 54-water source joint, 55-first tee joint, 61-first solenoid valve, 62-second solenoid valve, 63-third solenoid valve, 7-PLC controller, 8-coal return hood, 9-high-pressure pump. Embodiment

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0032] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0033] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0034] First embodiment:

[0035] As Figures 1 - 2 shown, a flushing system for the accumulated coal return at the telescopic tail of a scraper conveyor includes a spray head 4, a filter 52, a ball stop valve 53, and a water source connector 54. A bottom plate 1 and a middle plate 2 are provided at the telescopic tail. The bottom plate 1 is fixed, and a slide rail is provided on the bottom plate 1. The middle plate 2 moves along the slide rail under the action of a telescopic oil cylinder. A coal return cover 8 is provided at the tail of the telescopic tail for cleaning the accumulated coal. A side plate 3 is provided between the bottom plate 1 and the middle plate 2, and the side plate 3 is provided on both sides of the bottom plate 1. The water source connector 54 is connected to a water source, and the water source connector 54, the ball stop valve 53, the filter 52, and the spray head 4 are sequentially connected through pipes. The ball stop valve 53 is the switch of the flushing system, and the filter 52 filters the water source. More than three spray heads 4 are provided on the side plate 3 at intervals, and the spray heads 4 face the space between the bottom plate 1 and the middle plate 2; As Figure 3 shown, the spray head 4 inclines towards the inside of the telescopic tail, inclines towards the coal return cover 8, and at the same time inclines downwards, so that the returned coal has a tendency to move towards the coal return cover 8, making it more convenient to clean.

[0036] The slide rail and the telescopic oil cylinder are existing components in the prior art and are not shown in the figure.

[0037] Second Embodiment:

[0038] As Figures 1 - 2 shown, a flushing system for the accumulated coal return at the telescopic tail of a scraper conveyor includes a spray head 4, a filter 52, a ball shut-off valve 53, and a water source connector 54. At the telescopic tail, there is a bottom plate 1 and a middle plate 2. The bottom plate 1 is fixed, and a slide rail is arranged on the bottom plate 1. The middle plate 2 moves along the slide rail under the action of a telescopic oil cylinder. At the tail of the telescopic tail, there is a coal return hood 8 for cleaning the accumulated coal. A side plate 3 is arranged between the bottom plate 1 and the middle plate 2, and the side plate 3 is arranged on both sides of the bottom plate 1. The water source connector 54 is connected to a water source, and the water source connector 54, the ball shut-off valve 53, the filter 52, and the spray head 4 are sequentially connected through pipelines. The ball shut-off valve 53 is the switch of the flushing system, and the filter 52 filters the water source. More than three spray heads 4 are provided, arranged on the side plate 3 at intervals, and the spray heads 4 face the space between the bottom plate 1 and the middle plate 2. As Figure 3 shown, the spray head 4 inclines towards the inside of the telescopic tail, towards the coal return hood 8, and also inclines downwards, causing the returned coal to tend to move towards the coal return hood 8, making it more convenient for cleaning.

[0039] The slide rail and the telescopic oil cylinder are existing components in the prior art and are not shown in the figure.

[0040] As Figure 3 shown, as the spray heads 4 gradually approach the coal return hood 8 one by one, the inclination angle of the spray heads 4 towards the inside of the telescopic tail gradually becomes smaller, and the downward inclination angle gradually becomes smaller or larger, forming a more comprehensive and multi-level flushing surface for the accumulated returned coal, further optimizing the flushing effect on the returned coal.

[0041] Three spray heads 4 are provided, namely a first spray head 41, a second spray head 42, and a third spray head 43.

[0042] The inward inclination angles of the first spray head 41, the second spray head 42, and the third spray head 43 are respectively 50 - 60°, 30 - 40°, and 20 - 30°, and the downward inclination angles are respectively 20 - 30°, 30 - 40°, and 50 - 60°.

[0043] Third Embodiment:

[0044] As Figures 1 - 2As shown in the figure, a flushing system for the accumulated coal return at the telescopic tail of a scraper conveyor includes a spray head 4, a filter 52, a ball stop valve 53, and a water source connector 54. At the telescopic tail, there is a bottom plate 1 and a middle plate 2. The bottom plate 1 is fixed, and a slide rail is arranged on the bottom plate 1. The middle plate 2 moves along the slide rail under the action of a telescopic oil cylinder. At the tail of the telescopic tail, there is a coal return hood 8 for cleaning the accumulated coal. A side plate 3 is arranged between the bottom plate 1 and the middle plate 2, and the side plate 3 is arranged on both sides of the bottom plate 1. The water source connector 54 is connected to a water source, and the water source connector 54, the ball stop valve 53, the filter 52, and the spray head 4 are sequentially connected through pipelines. The ball stop valve 53 is the switch of the flushing system, and the filter 52 filters the water source. More than three spray heads 4 are provided and are arranged on the side plate 3 at intervals. The spray heads 4 face the space between the bottom plate 1 and the middle plate 2; as Figure 3 As shown in the figure, the spray head 4 inclines towards the inside of the telescopic tail, towards the direction of the coal return hood 8, and at the same time inclines downwards, so that the returned coal has a tendency to move towards the coal return hood 8, making it more convenient to clean.

[0045] As Figure 5 shown in the figure, the water source connector 54 is connected to the water source through a high-pressure pump 9, so that the water sprayed by the spray head 4 is high-pressure water. The pressure of the high-pressure water can be adjusted by adjusting the pressure of the high-pressure pump 9. The high-pressure water can form a certain impact force and driving force on the returned coal, prompting the returned coal to move towards the coal return hood 8, which helps with the subsequent treatment of the returned coal. The pipeline between the water source connector 54 and the spray head 4 adopts a high-pressure pipeline, and the filter 52 adopts a high-pressure filter, thereby stabilizing the flushing effect.

[0046] Fourth Embodiment:

[0047] As Figures 1 - 2 shown in the figure, a flushing system for the accumulated coal return at the telescopic tail of a scraper conveyor includes a spray head 4, a filter 52, a ball stop valve 53, and a water source connector 54. At the telescopic tail, there is a bottom plate 1 and a middle plate 2. The bottom plate 1 is fixed, and a slide rail is arranged on the bottom plate 1. The middle plate 2 moves along the slide rail under the action of a telescopic oil cylinder. At the tail of the telescopic tail, there is a coal return hood 8 for cleaning the accumulated coal. A side plate 3 is arranged between the bottom plate 1 and the middle plate 2, and the side plate 3 is arranged on both sides of the bottom plate 1. The water source connector 54 is connected to a water source, and the water source connector 54, the ball stop valve 53, the filter 52, and the spray head 4 are sequentially connected through pipelines. The ball stop valve 53 is the switch of the flushing system, and the filter 52 filters the water source. More than three spray heads 4 are provided and are arranged on the side plate 3 at intervals. The spray heads 4 face the space between the bottom plate 1 and the middle plate 2; as Figure 3 shown in the figure, the spray head 4 inclines towards the inside of the telescopic tail, towards the direction of the coal return hood 8, and at the same time inclines downwards, so that the returned coal has a tendency to move towards the coal return hood 8, making it more convenient to clean.

[0048] As Figure 2As shown, there are three spray heads 4, namely a first spray head 41, a second spray head 42 and a third spray head 43; the flushing system further includes two three-way joints, namely a first three-way joint 55 and a second three-way joint 51; the water source joint 54 has more than two interfaces, one of which is connected to the water source and the other is connected to the ball shut-off valve 53; the ball shut-off valve 53 is connected to the second three-way joint 51 through a filter 52, and the other two interfaces of the second three-way joint 51 are respectively connected to the third spray head 43 and the first three-way joint 55, and the two joints of the first three-way joint 55 are respectively connected to the first spray head 41 and the second spray head 42, forming a water supply system for the first spray head 41, the second spray head 42 and the third spray head 43.

[0049] Fifth Embodiment:

[0050] As Figures 1 - 2 shown, a flushing system for the accumulated coal return at the telescopic tail of a scraper conveyor includes a spray head 4, a filter 52, a ball shut-off valve 53, and a water source joint 54. There is a bottom plate 1 and a middle plate 2 at the telescopic tail. The bottom plate 1 is fixed, and a slide rail is arranged on the bottom plate 1. The middle plate 2 moves along the slide rail under the action of a telescopic oil cylinder. A coal return cover 8 is provided at the tail of the telescopic tail for cleaning the accumulated coal; a side plate 3 is provided between the bottom plate 1 and the middle plate 2, and the side plate 3 is arranged on both sides of the bottom plate 1; the water source joint 54 is connected to the water source, and the water source joint 54, the ball shut-off valve 53, the filter 52, and the spray head 4 are sequentially connected through pipelines. The ball shut-off valve 53 is the switch of the flushing system, and the filter 52 filters the water source. There are more than three spray heads 4, which are arranged on the side plate 3 at intervals, and the spray heads 4 face the space between the bottom plate 1 and the middle plate 2; as Figure 3 shown, the spray head 4 inclines towards the inside of the telescopic tail, towards the coal return cover 8, and also inclines downwards, so that the coal return has a tendency to move towards the coal return cover 8, making it more convenient to clean.

[0051] As Figure 2 shown, there are three spray heads 4, namely a first spray head 41, a second spray head 42 and a third spray head 43; the flushing system further includes two three-way joints, namely a first three-way joint 55 and a second three-way joint 51; the water source joint 54 has more than two interfaces, one of which is connected to the water source and the other is connected to the ball shut-off valve 53; the ball shut-off valve 53 is connected to the second three-way joint 51 through a filter 52, and the other two interfaces of the second three-way joint 51 are respectively connected to the third spray head 43 and the first three-way joint 55, and the two joints of the first three-way joint 55 are respectively connected to the first spray head 41 and the second spray head 42, forming a water supply system for the first spray head 41, the second spray head 42 and the third spray head 43.

[0052] AsFigure 4 As shown, electromagnetic valves are respectively provided between the first spray head 41 and the first three-way joint 55, between the second spray head 42 and the first three-way joint 55, and between the third spray head 43 and the second three-way joint 51, which are the first electromagnetic valve 61, the second electromagnetic valve 62 and the third electromagnetic valve 63 respectively, to individually control the first spray head 41, the second spray head 42 and the third spray head 43; the flushing system is further provided with a PLC controller 7, and the output end of the PLC controller 7 is connected to the first electromagnetic valve 61, the second electromagnetic valve 62 and the third electromagnetic valve 63 to directly control the start and stop of the first electromagnetic valve 61, the second electromagnetic valve 62 and the third electromagnetic valve 63. The operator only needs to input instructions to the PLC controller 7 according to the situation of coal accumulation to flexibly adjust the use of the spray head 4, thereby realizing the remote control of the spray head, making it more intelligent and protecting the operator.

[0053] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A flushing system for the accumulated return coal at the telescopic tail of a scraper conveyor, wherein a bottom plate and a middle plate are provided at the telescopic tail, the bottom plate is fixed, a slide rail is provided on the bottom plate, and the middle plate moves along the slide rail under the action of a telescopic oil cylinder; a return coal cover is provided at the tail of the telescopic tail; side plates are provided between the bottom plate and the middle plate, and the side plates are provided on both sides of the bottom plate, and the characteristics are as follows: The flushing system includes a nozzle, a filter, a ball stop valve, and a water source joint. The water source joint is connected to the water source, and the water source joint, the ball stop valve, the filter, and the nozzle are connected in sequence through pipes; there are more than three nozzles, which are arranged on the side plates and arranged at intervals. The nozzles are directed toward the space between the bottom plate and the middle plate, and the nozzles are inclined toward the inside of the telescopic machine tail, toward the direction of the coal return hood, and downward at the same time.

2. A flushing system for coal accumulation at the tail of a telescopic scraper conveyor according to claim 1, characterized in that: The water source connector is connected to the water source through a high-pressure pump, the pipeline between the water source connector and the nozzle is a high-pressure pipeline, and the filter is a high-pressure filter.

3. A flushing system for coal accumulation at the tail of a telescopic scraper conveyor according to claim 1, characterized in that: The nozzles are provided with three, namely the first nozzle, the second nozzle and the third nozzle; the flushing system also includes a three-way joint, and the three-way joints are provided with two, namely the first three-way joint and the second three-way joint; the water source joint is provided with more than two interfaces, one of which is connected to the water source, and the other interface is connected to the spherical stop valve; the spherical stop valve is connected to the second three-way joint through a filter, and the other two interfaces of the second three-way joint are respectively connected to the third nozzle and the first three-way joint, and the two joints of the first three-way joint are respectively connected to the first nozzle and the second nozzle.

4. A flushing system for coal accumulation at the tail of a telescopic scraper conveyor according to claim 1, characterized in that: As the nozzles approach the coal return hood one by one, the inclination angles of the nozzles toward the inside of the telescopic machine tail gradually decrease, and the downward inclination angles gradually decrease or increase.

5. The flushing system for the coal piled up at the end of the telescopic scraper conveyor according to claim 3 is characterized in that: Solenoid valves are respectively provided between the first nozzle and the first three-way joint, between the second nozzle and the first three-way joint, and between the third nozzle and the second three-way joint, namely the first solenoid valve, the second solenoid valve and the third solenoid valve, for individually controlling the first nozzle, the second nozzle and the third nozzle; the flushing system is also provided with a PLC controller, and the output end of the PLC controller is connected to the first solenoid valve, the second solenoid valve and the third solenoid valve.

6. A flushing system for coal accumulation at the tail of a telescopic scraper conveyor according to claim 4, characterized in that: There are three nozzles, namely the first nozzle, the second nozzle and the third nozzle; the inward inclination angles of the first nozzle, the second nozzle and the third nozzle are 50~60°, 30~40° and 20~30° respectively, and the downward inclination angles are 20~30°, 30~40° and 50~60° respectively.

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