Hydraulic Sliding Scraper Filling Conveyor Baffle Device and Its Usage Method

Abstract

The present invention discloses a material retaining device for a hydraulic slip-type scraper filling conveyor, which includes a tail chute, a movable material retaining device, a connecting mechanism and a hydraulic cylinder. When material retaining is required during the filling in the middle of the working face, the piston rod of the hydraulic cylinder is extended so that the movable baffle is extended accordingly. At this time, the materials transported from the self-propelled transfer machine will all fall into the tail chute of the scraper filling conveyor due to the material retaining effect of the fixed baffle and the movable baffle. When material retaining is not required during the filling at the end of the working face, the piston rod of the hydraulic cylinder is retracted, thereby retracting the movable baffle. At this time, the materials transported from the self-propelled transfer machine will fall from the notch of the fixed baffle due to the absence of the movable baffle, thus realizing the function of discharging and filling at the end. The present invention also discloses the usage method of this device. The hydraulic material of this device adopts the commonly used emulsion of the hydraulic supports in the working face, which is convenient to use and easy to obtain, and the remote control function can be realized by operating the valve, fully ensuring the safety of underground operation personnel.

Description

Technical Field

[0001] The invention belongs to the technical field of underground mining equipment, and relates to a material retaining device for a hydraulic sliding scraper filling conveyor.

[0002] The invention also relates to a using method of the material retaining device for the hydraulic sliding scraper filling conveyor. Background Art

[0003] The fully mechanized solid filling coal mining technology can realize the alternative operation of coal mining and filling under the protection of the same hydraulic support. Its process includes a coal mining process and a filling process. Among them, the layout of the coal mining and coal transportation systems is the same as that of the ordinary fully mechanized coal mining process. The difference is that the fully mechanized solid filling coal mining technology adds a set of filling material transportation system that transports solid filling materials such as surface gangue to the underground and then transports them to the gob of the working face, and a ramming system located behind the filling coal mining hydraulic support for ramming the gob filling materials; in the fully mechanized solid filling coal mining technology, solid filling materials such as gangue are transported to the scraper filling conveyor suspended under the rear roof beam of the filling coal mining hydraulic support through the filling material transportation system, and then the solid filling materials such as gangue fall into the gob through the discharge holes on the scraper filling conveyor, and finally are rammed by the ramming mechanism behind the filling coal mining hydraulic support;

[0004] Due to structural reasons, the scraper filling conveyor cannot be provided with a discharge hole on the last section of the tail chute, which leads to the inability of the material to be discharged through the discharge hole at the end of the working face; therefore, it is necessary to invent a material retaining device at the end of the last section of the scraper filling conveyor. When filling in the middle of the working face, the device can realize the material retaining function. When filling at the end of the working face, the baffle can realize the discharging function. And because the material retaining position is at the end of the working face to avoid potential safety hazards caused by manual operation, the device needs to be able to realize the remote control function. Summary of the Invention

[0005] The purpose of the invention is to provide a material retaining device for a hydraulic sliding scraper filling conveyor, which solves the problem that the existing scraper filling conveyor in coal mines cannot discharge materials through the discharge holes at the end of the working face.

[0006] Another purpose of the invention is to provide a using method of the material retaining device for the hydraulic sliding scraper filling conveyor.

[0007] The first technical solution adopted by the present invention is a material retaining device for a hydraulic slip-type scraper filling conveyor, which includes a tail chute. Along one side edge of the tail chute, a fixed baffle is provided. The fixed baffle includes a long fixed baffle and a short fixed baffle. The long fixed baffle and the short fixed baffle are respectively located at both ends of one side of the tail chute and are not adjacent. An active material retaining device is provided between the long fixed baffle and the short fixed baffle of the tail chute. The active material retaining device is connected to a hydraulic cylinder through a connecting mechanism, and the hydraulic cylinder drives the active material retaining device to move between the long fixed baffle and the short fixed baffle.

[0008] The characteristics of the first technical solution of the present invention are further as follows:

[0009] Among them, the active material retaining device includes a chute, which is opened along the edge of the tail chute and is close to the fixed baffle. The chute is located on the side of the fixed baffle away from the tail chute. It also includes an active baffle that moves in the chute. The active baffle is parallel to the fixed baffle. The active baffle is connected to the hydraulic cylinder through a connecting mechanism, and the hydraulic cylinder is located on the side edge of the tail chute;

[0010] Among them, the fixed baffle and the active baffle have the same height and thickness, and the heights of the fixed baffle and the active baffle are both higher than the top groove surface of the tail chute, which is used to increase the loading capacity of the tail chute and prevent materials from overflowing from the tail chute;

[0011] Among them, the tail chute is provided with a guiding hole along its side surface and below the chute. The tail chute is successively provided with a head fixing block and a middle fixing block along the guiding hole, and the head fixing block and the middle fixing block respectively fix the cylinder body of the hydraulic cylinder;

[0012] Among them, a connecting block is provided between the active baffle and the hydraulic cylinder. The connecting block is embedded in the chute. The hydraulic cylinder includes a piston rod, and the output end of the piston rod is connected with a connecting mechanism. One end of the connecting block away from the active baffle is embedded in the connecting mechanism, and the connecting mechanism is located in the guiding hole;

[0013] Among them, the length of the chute is twice the length of the active baffle. The opening width of the chute close to the active baffle is greater than the thickness of the active baffle. The opening width of the chute close to the connecting block is less than the thickness of the active baffle and greater than the thickness of the connecting block, so that the active baffle and its connecting block can slide simultaneously in the upper half and the lower half of the chute respectively, and prevent the active baffle from falling into the lower half of the chute.

[0014] The second technical solution of the present invention is a using method of the material retaining device for a hydraulic slip-type scraper filling conveyor. The material retaining device for a hydraulic slip-type scraper filling conveyor is adopted, and the specific implementation steps are as follows:

[0015] Step 1, when it is necessary to discharge and fill in the middle of the working face, operate the valve to control the piston rod of the hydraulic cylinder to extend outwards. The connecting mechanism drives the movable baffle to extend forward from the chute and finally adjacent to the short fixed baffle. At this time, the materials transported by the self-propelled transfer machine fall onto the tail chute of the scraper filling conveyor and are transported to the middle of the working face along with the operation of the scraper filling conveyor suspended on the rear roof beam of the filling coal mining hydraulic support, and are discharged through the discharge hole into the gob area of the working face for filling;

[0016] Step 2, when the gob area in the middle of the working face is full, start the discharge and filling at the end of the working face tail: operate the piston rod of the hydraulic cylinder to retract inwards, and synchronously drive the movable baffle to retract through the connecting mechanism. At this time, the movable baffle retracts to the outside of the long fixed baffle, and the gap between the long fixed baffle and the short fixed baffle opens;

[0017] Step 3, move the drum of the self-propelled transfer machine to the gap between the long fixed baffle and the short fixed baffle, and the materials transported by the self-propelled transfer machine fall at the baffle gap, thereby realizing the blanking filling at the end of the working face tail;

[0018] Step 4, after the end of the working face is filled with the falling materials, the coal shearer of the working face performs coal cutting operation. After cutting one knife of coal, move the filling coal mining hydraulic support forward by a step distance, and the step distance is between 0.7 and 0.9 m;

[0019] Step 5, after all the filling coal mining hydraulic supports are moved by a step distance and leveled and straightened, repeat Steps 1 - 4 to carry out the filling operation on the gob area of the working face.

[0020] The beneficial effects of the present invention are:

[0021] The hydraulic sliding scraper filling conveyor baffle device and its use method of the present invention. The device includes a tail chute, a movable baffle device, a connecting mechanism and a hydraulic cylinder. When baffle is needed for filling in the middle of the working face, extend the piston rod of the hydraulic cylinder to make the movable baffle extend accordingly. At this time, all the materials transported from the self-propelled transfer machine fall into the tail chute of the scraper filling conveyor due to the baffle effect of the fixed baffle and the movable baffle. When baffle is not needed for filling at the end of the working face, retract the piston rod of the hydraulic cylinder to make the movable baffle retract. At this time, the materials transported from the self-propelled transfer machine fall from the gap of the fixed baffle due to the absence of the movable baffle, thus realizing the function of discharging and filling at the end; the hydraulic material of the device uses the commonly used emulsion of the working face hydraulic support, which is convenient to use and obtain, and can realize the remote control function by operating the valve, fully ensuring the safety of coal mine underground operation personnel. Brief Description of the Drawings

[0022] Figure 1 is the overall structural schematic diagram of the hydraulic sliding scraper filling conveyor baffle device of the present invention;

[0023] Figure 2 It is a schematic structural view of the tail chute in the material retaining device of the hydraulic slip type scraper filling conveyor of the present invention;

[0024] Figure 3 It is a schematic structural view of the movable baffle, connecting mechanism and hydraulic cylinder in the material retaining device of the hydraulic slip type scraper filling conveyor of the present invention;

[0025] Figure 4 It is a schematic view of the positional relationship among the material retaining device of the hydraulic slip type scraper filling conveyor, the self - propelled transfer machine and the filling coal mining hydraulic support of the present invention;

[0026] Figure 5 It is a schematic layout view of the equipment in the fully mechanized solid filling working face;

[0027] Figure 6 It is a schematic structural view of the middle chute.

[0028] In the figure, 1. Tail chute, 2. Movable material retaining device, 3. Connecting mechanism, 4. Hydraulic cylinder, 5. Scraper chain, 6. Fixed baffle, 6 - 1. Long fixed baffle, 6 - 2. Short fixed baffle, 7. Chute, 8. Guide hole, 9. Movable baffle, 10. Connecting block, 11. Head fixed block, 12. Middle fixed block, 13. Piston rod, 14. Gangue haulage roadway, 15. Self - propelled transfer machine, 16. End hydraulic support, 17. Filling coal mining hydraulic support, 18. Shearer, 19. Scraper filling conveyor, 20. Middle chute, 21. Discharge hole. Specific embodiments

[0029] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] For fully mechanized solid filling, materials such as gangue need to be transported from the gangue haulage roadway 14 to the gob area behind the working face for filling. After the materials are transferred to the self - propelled transfer machine 15 through a belt conveyor, they are transferred by the self - propelled transfer machine 15 onto the scraper filling conveyor 19 and transported towards the middle of the working face under the drive of the scraper chain 5. The scraper filling conveyor 19 is hung on the rear tail beam of the filling coal mining hydraulic support 17. A discharge hole 21 is provided on the middle chute 20 of the scraper filling conveyor 19. Opening the discharge hole 21 can complete the discharging process of the materials; however, due to structural reasons, the scraper filling conveyor 19 cannot be provided with a discharge hole on the last - section tail chute 1, resulting in the inability of the materials to be discharged through the discharge hole 21 at the end of the working face; therefore, the present invention is created to solve the above problems.

[0031] Such as Figure 1 、 2, as shown in FIGS. 3, the present invention provides a material retaining device for a hydraulic slip-type scraper filling conveyor, including a tail chute 1, a movable material retaining device 2, a connecting mechanism 3 and a hydraulic cylinder 4;

[0032] On one side surface of the tail chute 1, a fixed baffle 6 is vertically welded. The fixed baffle 6 includes a long fixed baffle 6-1 and a short fixed baffle 6-2. The tail chute 1 is provided with a chute 7, which is located outside the fixed baffle 6 and is used for the movable baffle 9 to slide in the chute 7. At the end and in the middle of the outer edge of one side of the tail chute 1 where the chute 7 is provided, a head fixing block 11 and a middle fixing block 12 are welded;

[0033] The movable material retaining device 2 is vertically placed in the chute 7 of the tail chute 1 and includes a movable baffle 9 and a connecting block 10. The two are integrally cast. The connecting block 10 is located at the bottom end of the movable baffle 9. The thickness of the connecting block 10 is less than that of the movable baffle 9 and can be inserted into the connecting mechanism 3 to achieve the purpose of moving synchronously with the connecting mechanism 3;

[0034] The connecting mechanism 3 is fixedly connected to the piston rod 13 of the hydraulic cylinder 4 by bolts, and the hydraulic cylinder 4 is fixedly connected to the head fixing block 11 and the middle fixing block 12 of the tail chute 1 by bolts.

[0035] To further understand the present invention, the present invention also provides a usage method of the material retaining device for the hydraulic slip-type scraper filling conveyor. In combination with Figure 4 , Figure 5 , Figure 6 , the working process is further described;

[0036] Step 1, when it is necessary to discharge and fill in the middle of the working face, operate the valve to make the piston rod 13 of the hydraulic cylinder 4 extend outwards. The movable baffle 9 is driven by the connecting mechanism 3 to extend forward from the chute 7 and finally adjacent to the short fixed baffle 6-2. At this time, the materials transported by the self-propelled transfer machine 15 fall onto the tail chute 1 of the scraper filling conveyor 19 and are transported to the middle of the working face along with the operation of the scraper filling conveyor 19 suspended on the rear crossbeam of the filling coal mining hydraulic support 17, and are discharged through the discharge hole 21 into the gob area of the working face for filling;

[0037] Step 2, when the gob area in the middle of the working face is full, start the discharge and filling at the end of the working face tail. At this time, operate the piston rod 13 of the hydraulic cylinder to retract inwards, and the movable baffle 9 is synchronously driven by the connecting mechanism 3 to retract. At this time, the movable baffle 9 retracts to the outside of the long fixed baffle 6-1, and the gap between the long fixed baffle 6-1 and the short fixed baffle 6-2 is opened;

[0038] Step 3, move the drum of the self-propelled transfer machine 15 to the gap between the long fixed baffle 6-1 and the short fixed baffle 6-2. The materials transported by the self-propelled transfer machine 15 fall at the baffle gap, thereby realizing the falling material filling at the end of the working face tail;

[0039] Step 4: After the working face end is filled with materials, the shearer 18 on the working face performs coal cutting operation. After cutting one pass of coal, move the filling hydraulic powered support 17 forward by a step distance, and the step distance is between 0.7 m and 0.9 m.

[0040] Step 5: After all the filling hydraulic powered supports 17 are moved by one step distance and leveled and aligned, repeat Steps 1 - 4 to perform filling operation towards the gob area of the working face.

Claims

1. Hydraulic slip type scraper filling conveyor baffle device, characterized in that, It includes a tail chute (1). Along one side edge of the tail chute (1), there is a fixed baffle (6). The fixed baffle (6) includes a long fixed baffle (6-1) and a short fixed baffle (6-2). The long fixed baffle (6-1) and the short fixed baffle (6-2) are respectively located at both ends of one side of the tail chute (1) and are not adjacent. Between the long fixed baffle (6-1) and the short fixed baffle (6-2), there is a movable material retaining device (2) in the tail chute (1). The movable material retaining device (2) is connected to a hydraulic cylinder (4) through a connecting mechanism (3). The hydraulic cylinder (4) drives the movable material retaining device (2) to move between the long fixed baffle (6-1) and the short fixed baffle (6-2); The movable material retaining device (2) includes a chute (7). The chute (7) is opened along the edge of the tail chute (1) and is close to the fixed baffle (6). The chute (7) is located on the side of the fixed baffle (6) away from the tail chute (1). It also includes a movable baffle (9) moving in the chute (7). The movable baffle (9) is parallel to the fixed baffle (6). The movable baffle (9) is connected to the hydraulic cylinder (4) through a connecting mechanism (3). The hydraulic cylinder (4) is located along the side edge of the tail chute (1).

2. The material retaining device of the hydraulic slip-type scraper filling conveyor according to claim 1, characterized in that The fixed baffle (6) and the movable baffle (9) have the same height and thickness, and the heights of both the fixed baffle (6) and the movable baffle (9) are higher than the top groove surface of the tail chute (1).

3. The material retaining device of the hydraulic slip type scraper filling conveyor according to claim 1, wherein The tail chute (1) is provided with a guiding hole (8) along its side surface and below the chute (7). Along the guiding hole (8) of the tail chute (1), there are a head fixing block (11) and a middle fixing block (12) in sequence. The head fixing block (11) and the middle fixing block (12) respectively fix the cylinder body of the hydraulic cylinder (4).

4. The baffle device of the hydraulic slip type scraper filling conveyor according to claim 1 or 3, characterized in that, There is a connecting block (10) between the movable baffle (9) and the hydraulic cylinder (4). The connecting block (10) is embedded in the chute (7). The hydraulic cylinder (4) includes a piston rod (13). The output end of the piston rod (13) is connected with a connecting mechanism (3). One end of the connecting block (10) away from the movable baffle (9) is embedded in the connecting mechanism (3). The connecting mechanism (3) is located in the guiding hole (8).

5. The baffle device of the hydraulic slip type scraper filling conveyor according to claim 4, characterized in that The length of the chute (7) is twice the length of the movable baffle (9). The opening width of the chute (7) close to the movable baffle (9) is greater than the thickness of the movable baffle (9). The opening width of the chute (7) close to the connecting block (10) is less than the thickness of the movable baffle (9) and greater than the thickness of the connecting block (10).

6. Method for using the material retaining device of the hydraulic sliding scraper filling conveyor, adopting the material retaining device of the hydraulic sliding scraper filling conveyor according to any one of claims 1 to 5, characterized in that, Specifically, it is implemented according to the following steps: Step 1, when it is necessary to discharge and fill materials in the middle of the working face, operate the valve to control the piston rod (13) of the hydraulic cylinder (4) to extend outwards. The connecting mechanism (3) drives the movable baffle (9) to extend forward from the chute (7) and finally be adjacent to the short fixed baffle (6-2). At this time, the materials transported by the self-propelled transfer machine (15) fall onto the tail chute (1) of the scraper filling conveyor (19) and are transported to the middle of the working face along with the operation of the scraper filling conveyor (19) suspended on the rear roof beam of the filling coal mining hydraulic support (17), and are discharged into the gob area of the working face through the discharge hole (21) for filling; Step 2: When the gob area in the middle of the working face is filled, start the discharging and filling at the end of the tail of the working face. Operate the piston rod (13) of the hydraulic cylinder (4) to retract inward, and synchronously drive the movable baffle (9) to retract through the connecting mechanism (3). At this time, the movable baffle (9) retracts to the outside of the long fixed baffle (6-1), and the gap between the long fixed baffle (6-1) and the short fixed baffle (6-2) opens. Step 3: Move the drum of the self-advancing conveyor (15) to the gap between the long fixed baffle (6-1) and the short fixed baffle (6-2). The materials transported by the self-advancing conveyor (15) fall at the baffle gap, thereby realizing the blanking filling at the end of the tail of the working face. Step 4: After the blanking at the end of the working face is filled, the shearer (18) of the working face performs coal cutting operation. After cutting one pass of coal, move the filling coal mining hydraulic support (17) forward by a step distance, and the step distance is between 0.7 and 0.9 m. Step 5: After all the filling coal mining hydraulic supports (17) have moved a step distance and are leveled and straightened, repeat Steps 1 to 4 to carry out the filling operation in the gob area of the working face.

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