Drilling type coal mining machine conveying structure convenient to maintain

Abstract

The invention discloses a drilling type coal mining machine conveying structure convenient to maintain, and belongs to the technical field of coal mining machine conveying mechanisms, the drilling type coal mining machine conveying structure convenient to maintain comprises a middle groove and a traction chain arranged on the middle groove, a plurality of sets of scrapers are assembled on the traction chain, the scrapers are detachably connected with the traction chain, and the drilling type coal mining machine conveying structure further comprises a U-shaped pin arranged on the traction chain in a sleeving mode, the end part of the U-shaped pin is inserted into a through hole preset in the scraper blade; the lock pin is arranged to be in a foldable state relative to the U-shaped pin, on one hand, interference between the lock pin and the bottom sealing plate in the middle groove can be avoided when the scraper moves in the middle groove, on the other hand, after the scraper enters the middle groove again through the opening, the scraper and the traction chain can be preliminarily locked through the lock pin folded to be in the horizontal state, and therefore the scraper can be prevented from being damaged. Therefore, the scraping plate is prevented from being separated from the traction chain when moving along with the traction chain, and conditions are provided for subsequent workers to further lock the lock pin and the scraping plate.

Description

Technical Field

[0001] This invention relates to the field of coal mining machine conveying mechanism technology, and in particular to a conveying structure for a drill-type coal mining machine that is easy to maintain. Background Technology

[0002] Scraper conveyors are the core continuous material conveying equipment in underground coal mines (especially in coal mining faces). They use chains to pull scrapers to circulate in the trough, realizing the continuous conveying of materials such as coal and gangue. They are a key component of the coal mine's "three machines and one frame" supporting system.

[0003] Currently, scrapers and scraper chains in scraper conveyors are generally connected by bolts or other fasteners to facilitate scraper disassembly. However, since the ends of the scrapers are usually inserted into the trough, the scrapers can only be removed from the open areas on the trough. This results in the need to replace the scrapers at specific locations on the middle trough, which causes inconvenience for staff during inspection and maintenance.

[0004] Therefore, it is necessary to provide a conveying structure for drilling coal mining machines that is easy to maintain to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a convenient maintenance conveying structure for a drilling coal mining machine, in order to solve the problem mentioned in the background art that in existing scraper conveyors, the scraper and scraper chain are generally connected by fasteners such as bolts. However, since the ends of the scraper are usually inserted into the trough, the scraper needs to be replaced at a specific position on the middle trough, which brings inconvenience to the staff for inspection and maintenance.

[0006] Based on the above ideas, the present invention provides the following technical solution: a maintenance-friendly conveying structure for a drilling coal mining machine, comprising a central trough and a traction chain arranged on the central trough, wherein multiple sets of scrapers are mounted on the traction chain, the scrapers are detachably connected to the traction chain, and further comprising: A U-shaped pin is fitted onto the traction chain, and the end of the U-shaped pin is inserted into a pre-set hole in the scraper. The line connecting the two ends of the U-shaped pin passing through the hole is inclined relative to the scraper. A locking pin is installed at the end of a U-shaped pin. The locking pin can rotate relative to the U-shaped pin in the circumferential direction of the end of the U-shaped pin, and the locking pin can be folded into a horizontal state relative to the U-shaped pin and fit against the outer surface of the scraper. The snap-fit ​​assembly can lock the two locking pins at the ends of the U-shaped pin to prevent the scraper from disengaging from the U-shaped pin when the two locking pins are deflected to a horizontal state.

[0007] As a further aspect of the present invention: a rotating seat is provided between the locking pin and the end of the U-shaped pin, the bottom end of the locking pin is hinged to the rotating seat through a pin shaft, and the locking pin is elastically connected to the rotating seat along the circumferential direction of the pin shaft.

[0008] As a further aspect of the present invention: a connecting shaft is fixed to one end of the rotating seat near the U-shaped pin, and a mounting hole is provided at the end of the U-shaped pin to rotatably engage with the connecting shaft.

[0009] As a further aspect of the present invention: the two locking pins located at the ends of the U-shaped pins each have a flat surface on their opposite sides, and each flat surface has a circular hole. The snap-fit ​​assembly includes a magnetic element fixedly embedded in the circular hole of one of the locking pins; and a magnetic head slidably disposed in the circular hole of the other locking pin. When the two locking pins are deflected to a horizontal state so that the flat surfaces on the two locking pins are aligned, the magnetic element and the magnetic head can approach each other through magnetic attraction, such that the magnetic head on one locking pin can be inserted into the circular hole on the other locking pin.

[0010] As a further aspect of the present invention: one end of the central groove is a machine head frame, the other end of the central groove is a machine tail frame, a closed annular closure part is provided at the machine head frame, and an opening is provided on the annular closure part, so that the scraper can fall into the central groove through the opening before moving to the highest point of the annular closure part.

[0011] As a further aspect of the present invention: a through hole is provided on the locking pin along its diameter direction, and a threaded hole is provided on the top of the scraper. When the locking pin is deflected to a state parallel to the top of the scraper, the locking pin can fit against the scraper and the through hole and the threaded hole can be aligned.

[0012] As a further aspect of the invention: the U-shaped pin passes through one of the links on the traction chain.

[0013] As a further aspect of the present invention, the tail frame is in an open state.

[0014] As a further aspect of the present invention: the end of the connecting shaft is integrally formed with a convex ring, and an annular groove for accommodating the convex ring is provided on the inner wall of the mounting hole.

[0015] As a further aspect of the present invention: the top of the rotating seat is provided as a groove, the bottom of the locking pin is integrally formed with a protrusion, a stepped hole is provided on the groove wall, one end of the pin fixed to the protrusion is inserted into the stepped hole and rotatably connected to the rotating seat, and an elastic element is sleeved on the pin, the two ends of the elastic element are respectively connected to the outer wall of the pin and the inner wall of the stepped hole.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This device sets the locking pin to a foldable state relative to the U-shaped pin. On the one hand, it can avoid interference between the locking pin and the sealing plate in the central groove when the scraper moves in the central groove. On the other hand, when the scraper re-enters the central groove through the opening, the locking pin, which is folded to a horizontal state, can initially lock the scraper and the traction chain, thereby preventing the scraper from separating from the traction chain when it moves with the traction chain. This provides conditions for subsequent workers to further lock the locking pin and the scraper. Compared with traditional replacement methods, this solution does not require the scraper to be replaced at a specific location, which is more conducive to replacing the scraper during the workers' inspection process. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the headstock structure of the present invention; Figure 3 This is a schematic diagram of the cooperation between the scraper and the central groove of the present invention; Figure 4 This is a schematic diagram of the U-shaped pin and the traction chain of the present invention; Figure 5 This is a schematic diagram of the two locking pins of the present invention deflected to a horizontal state and arranged opposite to each other; Figure 6 This is a schematic diagram of the locking pin, rotating seat, and U-shaped pin of the present invention. Figure 7 This is a schematic diagram showing the location of the threaded hole in this invention; Figure 8 This is a schematic diagram of the connection structure between the rotating seat and the locking pin, and between the rotating seat and the U-shaped pin of the present invention; Figure 9 This is the present invention. Figure 6 A magnified structural diagram at point A; Figure 10 This is a schematic diagram of the two locking pins of the present invention deflected in opposite directions to a horizontal state.

[0018] In the diagram: 1. Central groove; 101. Head frame; 1011. Opening; 102. Tail frame; 103. Middle plate; 104. Slot; 2. Traction chain; 3. Scraper; 301. Snap-fit ​​part; 302. Threaded hole; 4. Locking pin; 401. Through hole; 402. Flat surface; 5. U-pin; 6. Rotating seat; 601. Connecting shaft; 6011. Protruding ring; 7. Pin; 8. Positioning pin; 9. Elastic element; 10. Magnetic element; 11. Baffle; 12. Magnetic head; 1201. Connecting part; 13. Fixing ring. Detailed Implementation

[0019] like Figures 1-10 As shown, a maintenance-friendly conveying structure for a drill-type coal mining machine includes a central trough 1 and a scraper conveying mechanism disposed on the central trough 1. Specifically, the scraper conveying mechanism includes a traction chain 2 and multiple sets of scrapers 3 detachably connected to the traction chain 2, with the multiple sets of scrapers 3 evenly distributed along the traction chain 2. Specifically, the scrapers 3 rest on the central plate 103 of the central trough 1, and the locking portions 301 at both ends of the scrapers 3 slide within the locking grooves 104 on the inner side of the trough wall, so that the scrapers 3 can only move along the traveling direction of the traction chain 2, thereby facilitating the conveying of coal slag resting on the central plate 103.

[0020] Furthermore, the two ends of the central trough 1 are a head frame 101 and a tail frame 102, respectively. Both the head frame 101 and the tail frame 102 are equipped with sprockets that mesh with the traction chain 2. It should be noted that the sprockets are fixedly mounted on the output shaft of the reducer, and the reducer is connected to an external motor to drive the traction chain 2 to rotate, thereby facilitating the movement of the scraper 3 on the top of the central plate 103. Since this is a conventional technical method, the structure of the central trough 1 and the traction chain 2 will not be described in detail here. The following will provide a detailed description of the detachable connection between the scraper 3 and the traction chain 2. A specific embodiment is as follows: The scraper 3 is connected to the traction chain 2 via a U-shaped pin 5. Specifically, the U-shaped pin 5 passes through a loop on the traction chain 2, and both ends of the U-shaped pin 5 pass through pre-set holes on the scraper 3, so that the scraper 3 can move synchronously when the traction chain 2 rotates.

[0021] A locking pin 4 is provided at one end of the U-shaped pin 5 that passes through the scraper 3. The locking pin 4 is coaxially arranged with the end of the U-shaped pin 5 and can rotate relative to the U-shaped pin 5 along its own circumference. Furthermore, the locking pin 4 can deflect relative to the U-shaped pin 5 to a state perpendicular or horizontal to the top of the scraper 3. Figure 5 As shown, the locking pin 4 has a through hole 401 along its diameter, while the top of the scraper 3 has a threaded hole 302. When the locking pin 4 is deflected to a state parallel to the top of the scraper 3, the locking pin 4 can fit against the scraper 3 and the through hole 401 and the threaded hole 302 can be aligned, which is conducive to locking the locking pin 4 and the scraper 3. Of course, the inner wall of the through hole 401 on the locking pin 4 can also be provided with internal threads, which is conducive to locking the locking pin 4 and the scraper 3 by means of studs or other components.

[0022] It should be noted that after the end of the U-shaped pin 5 passes through the pre-set hole on the scraper 3, the line connecting the two ends of the U-shaped pin 5 is inclined relative to the length direction of the scraper 3. That is, when the two locking pins 4 are deflected to a horizontal state, the opposite sides of the two locking pins 4 have the conditions to fit together. See the following for details. Figure 5 As shown.

[0023] The locking pins 4 located at both ends of the U-shaped pin 5 can be engaged by a snap-fit ​​assembly. When the two locking pins 4 are deflected to a horizontal state, the two locking pins 4 can be locked by the snap-fit ​​assembly, thereby preventing the scraper 3 from disengaging from the U-shaped pin 5, while the tail frame 102 is in an open state.

[0024] Specifically, each of the two locking pins 4 located at the ends of the U-shaped pin 5 has a flat surface 402 on its opposite side, and a circular hole is provided at each of the flat surfaces 402. The locking assembly includes a magnetic element 10 fixedly embedded in the circular hole of one of the locking pins 4, the magnetic element 10 being, for example, a magnet; and a magnetic head 12 slidably disposed in the circular hole of the other locking pin 4. The magnetic head 12 has different magnetic poles on its opposite side from the magnetic element 10. The magnetic head 12 can move relative to the locking pin 4 along the diameter direction of the locking pin 4. When the two locking pins 4 are deflected to a horizontal state so that the flat surfaces 402 on the two locking pins 4 are nearly in contact, the magnetic element 10 and the magnetic head 12 can be brought close together by magnetic attraction, so that the magnetic head 12 on one locking pin 4 can be inserted into the circular hole on the other locking pin 4 to lock the two locking pins 4, thereby preventing the locking pins 4 from being deflected to a vertical state relative to the U-shaped pin 5.

[0025] Combination Figure 2 As shown, a closed annular closure is provided at the head frame 101, which allows the scraper 3 to be confined within the annular closure when it moves with the traction chain 2, thereby preventing the scraper 3 from separating from the U-shaped pin 5 at the head frame 101. An opening 1011 is provided on the annular closure before the highest point. Specifically, during inspection, if a scraper 3 is found to be severely worn and needs replacement, the bolts or studs between the locking pin 4 and the scraper 3 can be removed, disengaging the locking pin 4 from the scraper 3. Then, the locking pin 4 can be rotated within the horizontal plane 402, allowing the two locking pins 4 to move away from each other. See the specific reference. Figure 10 As shown; during this process, the lock head on one of the locking pins 4 can be moved out of the circular hole on the other locking pin 4. When the scraper 3 moves with the traction chain 2 to the tail frame 102, since the tail frame 102 is in an open state, the scraper 3 can move along the U-shaped pin 5 in a direction away from the traction chain 2. The pressure of the scraper 3 on the locking pin 4 can cause the locking pin 4 to deflect into a state that is collinear with the end of the U-shaped pin 5, so that the scraper 3 can slide outward along the U-shaped pin 5 and the locking pin 4 and disengage from the traction chain 2. Afterwards, the U-shaped pin 5, which has detached from the scraper 3, will continue to move with the traction chain 2. The operator can place the new scraper 3 at the top of the middle groove 1, so that the U-shaped pin 5 and the locking pin 4 are inserted into the through hole on the scraper 3. During the rotation of the traction chain 2, the scraper 3 can be moved at the top of the middle groove 1. Specifically, before the scraper 3 moves to the highest point of the annular closed part, the scraper 3 can be aligned with the opening 1011, so that the locking part 301 at the end of the scraper 3 can re-enter the locking groove 104 in the groove side. During this process, the locking pin 4 will pass through the through hole on the scraper 3, and under the action of elastic force, the two locking pins 4 at the end of the U-shaped pin 5 can be deflected to a horizontal state and the planes 402 on the two locking pins 4 can be almost touching. It should be noted that before the locking pin 4 passes through the through hole on the new scraper 3, the operator needs to rotate the locking pin 4 in the circumferential direction of the end of the U-shaped pin 5 so that the locking pin 4 is deflected to a horizontal state and the planes 402 on the two locking pins 4 can be aligned. When the planes 402 of the two locking pins 4 are aligned, the magnetic attraction between the magnetic head 12 and the magnetic component 10 can cause the magnetic head 12 on one of the locking pins 4 to move out and insert into the circular hole of the other locking pin 4. At this point, the scraper 3 is initially locked onto the traction chain 2, so that when the traction chain 2 moves the scraper 3 to the tail frame 102, the scraper 3 can still be stably held on the traction chain 2. Then, the workers can further fix the locking pins 4 to the scraper 3 with locking components such as studs or bolts. In summary, this device sets the locking pin 4 to a foldable state relative to the U-shaped pin 5. On the one hand, it can prevent the locking pin 4 from interfering with the sealing plate in the central groove 1 when the scraper 3 moves in the central groove 1. On the other hand, when the scraper 3 re-enters the central groove 1 through the opening 1011, the locking pin 4, which is folded to a horizontal state, can initially lock the scraper 3 with the traction chain 2, thereby preventing the scraper 3 from separating from the traction chain 2 when it moves with the traction chain 2. This provides conditions for the staff to further lock the locking pin 4 with the scraper 3. Compared with traditional replacement methods, this solution does not require the scraper 3 to be replaced at a specific location, which is more conducive to the replacement of the scraper 3 during the staff's inspection.

[0026] Combination Figures 6-9 As shown, a rotating seat 6 is provided between the ends of the locking pin 4 and the U-shaped pin 5. Specifically, the rotating seat 6 has a columnar structure, and the rotating seat 6, locking pin 4, and U-shaped pin 5 have the same diameter. The top of the rotating seat 6 is set as a groove, while the bottom of the locking pin 4 is integrally formed with a protrusion. The protrusion is inserted into the groove and is rotatably connected to the rotating seat 6 through a pin 7. (Refer to...) Figure 8As shown, a stepped hole is provided on the groove wall of the slot. One end of the pin 7, which is fixed to the protrusion, is inserted into the stepped hole and rotatably connected to the rotating seat 6. An elastic element 9 is sleeved on the pin 7. The elastic element 9 can be, for example, a torsion spring or a coil spring. The two ends of the elastic element 9 are respectively connected to the outer wall of the pin 7 and the inner wall of the stepped hole, thereby realizing the elastic cooperation between the locking pin 4 and the rotating seat 6. This allows the scraper 3 to return to the central groove 1 through the opening 1011 so that after the locking pin 4 passes through the through hole on the scraper 3, the locking pin 4 can deflect to a horizontal state under the elastic force.

[0027] Furthermore, a connecting shaft 601 is fixed to one end of the rotating seat 6 near the U-shaped pin 5. A protruding ring 6011 is integrally formed at the end of the connecting shaft 601, and a mounting hole for inserting the connecting shaft 601 is provided at the end of the U-shaped groove. Of course, an annular groove for accommodating the protruding ring 6011 is provided on the inner wall of the mounting hole, so that the protruding ring 6011 can rotate in the annular groove to prevent the rotating seat 6 from disengaging from the U-shaped pin 5.

[0028] from Figure 8 As can be seen, a positioning pin 8 slides on the U-shaped pin 5, and multiple sets of positioning holes that cooperate with the positioning pin 8 are provided on the outer wall of the connecting shaft 601. When the operator rotates the locking pin 4 to adjust the position, the positioning pin 8 is inserted into the positioning hole, thereby preventing the locking pin 4 from rotating relative to the U-shaped pin 5.

[0029] Combination Figure 9 As shown, a columnar connector 1201 is fixed to the inner end face of the magnetic head 12, and a retaining ring 13 is fixed inside the circular hole where the magnetic head 12 is located. The connector 1201 passes through the retaining ring 13 and slides with it. It should be noted that a baffle 11 is fixed to one end of the connector 1201 that passes through the retaining ring 13. A spring is provided between the baffle 11 and the retaining ring 13 to achieve an elastic fit between the magnetic head 12 and the locking pin 4. Figure 9 As can be seen, a round hole can be provided on the locking pin 4. When the locking pin 4 and the scraper 3 are locked by the bolt or stud, the pin is passed through the round hole and inserted into the hole in the outer wall of the locking part, thereby preventing the locking part from separating from the locking pin 4.

[0030] The above-disclosed examples are merely preferred embodiments of this application, intended to facilitate understanding and implementation by those skilled in the art. However, they cannot be used to limit the scope of this application. Therefore, equivalent variations made within the scope of this application are still within the scope of this application.

Claims

1. A maintenance-friendly conveying structure for a drilling coal mining machine, comprising a central trough (1) and a traction chain (2) arranged on the central trough (1), wherein multiple sets of scrapers (3) are mounted on the traction chain (2), and the scrapers (3) are detachably connected to the traction chain (2), characterized in that, Also includes: U-shaped pin (5) is sleeved on the traction chain (2), and the end of the U-shaped pin (5) is inserted into the pre-set through hole on the scraper (3). The line connecting the two ends of the U-shaped pin (5) passing through the through hole is inclined relative to the scraper (3). Locking pin (4) is installed at the end of U-shaped pin (5). The locking pin (4) can rotate relative to the U-shaped pin (5) along the circumferential direction of the end of the U-shaped pin (5). The locking pin (4) can be folded into a horizontal state relative to the U-shaped pin (5) and attached to the outer surface of the scraper (3). The snap-fit ​​assembly can lock the two locking pins (4) at the ends of the U-shaped pin (5) to prevent the scraper (3) from disengaging from the U-shaped pin (5) when the two locking pins (4) at the ends of the U-shaped pin (5) are deflected to a horizontal state.

2. The easy-to-maintain conveying structure for a drilling coal mining machine according to claim 1, characterized in that: A rotating seat (6) is provided between the end of the locking pin (4) and the U-shaped pin (5). The bottom end of the locking pin (4) is hinged to the rotating seat (6) through the pin shaft (7), and the locking pin (4) is elastically connected to the rotating seat (6) along the circumferential direction of the pin shaft (7).

3. The easy-to-maintain conveying structure for a drilling coal mining machine according to claim 2, characterized in that: The rotating seat (6) has a connecting shaft (601) fixed at one end near the U-pin (5), and the end of the U-pin (5) is provided with a mounting hole that rotatably engages with the connecting shaft (601).

4. The easy-to-maintain conveying structure for a drilling coal mining machine according to claim 1, characterized in that: The two locking pins (4) located at the ends of the U-shaped pin (5) each have a flat surface (402) on their opposite sides, and each flat surface (402) has a circular hole. The snap-fit ​​assembly includes a magnetic element (10) fixedly embedded in the circular hole of one of the locking pins (4); and a magnetic head (12) slidably disposed in the circular hole of the other locking pin (4). When the two locking pins (4) are deflected to a horizontal state so that the flat surfaces (402) on the two locking pins (4) are aligned, the magnetic element (10) and the magnetic head (12) can approach each other by magnetic attraction, so that the magnetic head (12) on one of the locking pins (4) can be inserted into the circular hole on the other locking pin (4).

5. The easy-to-maintain conveying structure for a drilling coal mining machine according to claim 4, characterized in that: One end of the central groove (1) is the head frame (101), and the other end of the central groove (1) is the tail frame (102). The head frame (101) is provided with a closed annular closure part, and the annular closure part is provided with an opening (1011) so that the scraper (3) can fall into the central groove (1) through the opening (1011) before moving to the highest point of the annular closure part.

6. The easy-to-maintain conveying structure for a drilling coal mining machine according to claim 1, characterized in that: The locking pin (4) has a through hole (401) along its diameter direction, and the scraper (3) has a threaded hole (302) at the top. When the locking pin (4) is deflected to a state parallel to the top of the scraper (3), the locking pin (4) can fit with the scraper (3) and the through hole (401) and the threaded hole (302) can be aligned.

7. The easy-to-maintain conveying structure for a drilling coal mining machine according to claim 1, characterized in that: The U-shaped pin (5) passes through one of the links on the traction chain (2).

8. The easy-to-maintain conveying structure for a drilling coal mining machine according to claim 5, characterized in that: The tail section (102) is in an open state.

9. The easy-to-maintain conveying structure for a drilling coal mining machine according to claim 3, characterized in that: The end of the connecting shaft (601) is integrally formed with a convex ring (6011), and an annular groove for accommodating the convex ring (6011) is provided on the inner wall of the mounting hole.

10. A maintenance-friendly conveying structure for a drilling coal mining machine according to claim 2, characterized in that: The top of the rotating seat (6) is set as a slot, and the bottom of the locking pin (4) is integrally formed with a protrusion. A stepped hole is provided on the groove wall of the slot. One end of the pin (7) fixed to the protrusion is inserted into the stepped hole and rotatedly connected to the rotating seat (6). An elastic element (9) is sleeved on the pin (7). The two ends of the elastic element (9) are respectively connected to the outer wall of the pin (7) and the inner wall of the stepped hole.

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