Close-distance coal seam coal pillar high-stress supporting device

Abstract

The invention relates to the technical field of coal seam supporting, in particular to a close-distance coal seam coal pillar high-stress supporting device which comprises two supporting mechanisms used for supporting a coal seam, a top plate is fixedly connected between the two supporting mechanisms, a groove is formed in the top surface of the top plate, a top block is arranged in the groove, and the top plate is fixedly connected with the top surface of the top plate. The bottom face of the top plate is fixedly connected with a threaded sleeve which penetrates through the inner bottom face of the groove in the corresponding position in a sliding mode, the interior of the threaded sleeve is connected with a threaded rod in a screwed mode, the outer wall of the threaded rod is fixedly connected with a gear, and a limiting mechanism is arranged on the bottom face of the top plate and used for limiting the multiple threaded rods and comprises a connecting plate located below the top plate. According to the device, the rack is meshed with the gear at the corresponding position, the gear can be locked to prevent the screw from rotating, the top block can make contact with the top face of the coal seam all the time, and therefore the situation that the screw rotates due to vibration, the top block is separated from the top face of the coal seam, and the coal seam cannot be supported can be avoided.

Description

Technical Field

[0001] The invention relates to the technical field of coal seam support, in particular to a high-stress support device for coal pillars in a close-range coal seam. Background Art

[0002] Close-range coal seams usually refer to coal seams with very close spacing between them, which have significant mutual influence during mining. Specifically, a close-range coal seam group refers to multiple coal seams closely distributed in the stratum, usually with a distance of no more than 10 meters. These coal seams are intertwined and influence each other, forming complex geological structures and deposit types. Therefore, in the process of coal mining, in order to prevent the collapse of the upper coal seam, it is necessary to set up support devices at the coal seam.

[0003] Chinese patent publication number CN221400575U discloses a support device for coal mines. The device adjusts the height of each protection component according to the top structure in the mine so that each protection component abuts against the top of the mine. This effectively solves the problem in the prior art that the overall support frame sometimes cannot fit closely with the top of the tunnel over a large area, resulting in poor support effect.

[0004] Although the above patent can achieve fitting to the uneven top of the tunnel, there is no limit at the second spiral telescopic rod. During the process of coal mining by the tunnel boring machine, the entire tunnel will vibrate, causing the protective block to rotate, resulting in the protective block being unable to fit with the top of the tunnel. Therefore, there is no support at the coal seam, resulting in landslides in the coal seam. Summary of the invention

[0005] The object of the present invention is to provide a high-stress support device for coal pillars in close-range coal seams to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A high stress support device for coal pillars in close-range coal seams, comprising: Two supporting mechanisms for supporting the coal seam; A top plate is fixedly connected between the two supporting mechanisms, a groove is provided on the top surface of the top plate, a top block is arranged inside the groove, a threaded sleeve is fixedly connected to the bottom surface of the top block and slides through the bottom surface of the groove at the corresponding position, a screw is screwed inside the threaded sleeve, and a gear is fixedly connected to the outer wall of the screw; A limiting mechanism is arranged on the bottom surface of the top plate and is used to limit the positions of the multiple screw rods. The limiting mechanism includes a connecting plate located below the top plate, and a rack meshing with the gear at the corresponding position is fixedly connected to the side surface of the connecting plate corresponding to the gear; Two cleaning mechanisms are respectively arranged on the outer sides of the supporting mechanisms at corresponding positions and are used for cleaning the dust on the outer sides of the supporting mechanisms.

[0007] Furthermore, both ends of the bottom surface of the top plate are fixedly connected with a rectangular frame, a limit rod is fixedly connected between the two inner ends of the rectangular frame, a connecting block fixedly connected to the connecting plate is slidably passed through the outer wall of the limit rod, and one side of the connecting block is fixedly connected with a spring fixedly connected to the rectangular frame at the corresponding position.

[0008] Furthermore, two symmetrical limiting holes are formed on the inner bottom surface of the groove corresponding to the threaded sleeve, and limiting strips are fixedly connected to the outer wall of the threaded sleeve corresponding to the limiting holes and slide through the limiting holes at corresponding positions.

[0009] Further, the supporting mechanism comprises: Rectangular sleeve one, installed and fixed on the ground; The second rectangular sleeve is slidably sleeved inside the first rectangular sleeve at a corresponding position; The hydraulic cylinder is fixedly connected between the inner bottom surface of the rectangular sleeve one and the inner top surface of the rectangular sleeve two at corresponding positions.

[0010] Furthermore, fans are fixed through the side surfaces of the rectangular sleeve 1 at equal intervals.

[0011] Furthermore, the top ends of the two opposite side surfaces of the rectangular sleeve are fixedly connected with fixed blocks, and the cleaning mechanism includes: A circular frame is slidably sleeved on the outer side of the rectangular sleeve at a corresponding position; Eight silicone sheets are respectively fixedly connected to the edges of the inner side of the circular frame at corresponding positions and are in contact with the outer side of the rectangular sleeve 2 at corresponding positions; Two moving blocks are fixedly connected to two opposite sides of the circular frame at corresponding positions; A reciprocating screw rod is rotatably connected between the top plate and a fixed block at a corresponding position, and the reciprocating screw rod is through-threadedly connected with a moving block at a corresponding position; The motor is fixedly connected to the bottom surface of the fixed block at the corresponding position, and the output end of the motor passes through the fixed block at the corresponding position and is fixedly connected to the reciprocating screw rod at the corresponding position.

[0012] Furthermore, guide rods which penetrate and slide through the movable blocks at the corresponding positions are fixedly connected between the two ends of the bottom surface of the top plate and the fixed blocks at the corresponding positions.

[0013] The invention further lies in that: the two silicone sheets located on the same inner side of the circular frame form a V-shaped structure.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The device meshes the rack with the gear at the corresponding position, which can lock the gear to prevent the screw from rotating, so that the top block can always be in contact with the top surface of the coal seam, thereby preventing the screw from rotating due to vibration, causing the top block to separate from the top surface of the coal seam and failing to achieve the purpose of supporting the coal seam; By starting multiple fans, the air in the rectangular sleeve 1 and the rectangular sleeve 2 at the corresponding positions can be extracted, so as to realize the exchange of hot and cold gases outside the hydraulic cylinder to cool the hydraulic cylinder. Therefore, it can avoid the hydraulic cylinder being in the extended state for a long time, causing the cylinder body to heat up, thereby prolonging the service life of the hydraulic cylinder; By moving the circular frame up and down, the dust adsorbed on the outside of the rectangular sleeve 2 at the corresponding position can be scraped off, thereby preventing the dust from wearing the inner wall of the rectangular sleeve 1, and creating a larger gap between the rectangular sleeve 1 and the rectangular sleeve 2, so that the dust enters the interior of the rectangular sleeve 1 and the rectangular sleeve 2 through the gap and is adsorbed on the outer wall of the output end of the hydraulic cylinder. Therefore, the hydraulic cylinder can be protected, thereby preventing the dust from wearing the output end of the hydraulic cylinder 13. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the support mechanism structure in the present invention; Figure 3 It is a schematic diagram of the top plate structure in the present invention; Figure 4 It is a schematic diagram of the structure of the limiting mechanism in the present invention; Figure 5 It is a schematic diagram of the cleaning mechanism structure of the present invention; Figure 6 It is a cross-sectional view of the circular frame in the present invention.

[0016] In the figure: 1. supporting mechanism; 11. rectangular sleeve one; 12. rectangular sleeve two; 13. hydraulic cylinder; 14. fan; 15. fixed block; 2. top plate; 21. groove; 22. top block; 23. threaded sleeve; 24. gear; 3. limiting mechanism; 31. connecting plate; 32. rack; 33. rectangular frame; 34. connecting block; 35. spring; 4. cleaning mechanism; 41. circular frame; 42. silicone sheet; 43. moving block; 44. reciprocating screw; 45. motor; 46. guide rod. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-5 In an embodiment of the present invention, a high-stress support device for a coal pillar in a close-range coal seam comprises two support mechanisms 1, a top plate 2, a limiting mechanism 3 and two cleaning mechanisms 4. The two support mechanisms 1 are used to support the coal seam. The top plate 2 is fixedly connected between the two support mechanisms 1. A groove 21 is provided on the top surface of the top plate 2. A top block 22 is provided inside the groove 21. A threaded sleeve 23 that slides through the inner bottom surface of the groove 21 at a corresponding position is fixedly connected to the bottom surface of the top block 22. A screw is screwed inside the threaded sleeve 23. A gear 24 is fixedly connected to the outer wall of the screw. The limiting mechanism 3 is arranged on the bottom surface of the top plate 2 for limiting the position of multiple screws. The limiting mechanism 3 comprises a connecting plate 31 located below the top plate 2. A rack 32 that meshes with the gear 24 at the corresponding position is fixedly connected to the side surface of the connecting plate 31 at the corresponding gear 24. The two cleaning mechanisms 4 are respectively arranged on the outer sides of the support mechanisms 1 at the corresponding positions for cleaning the dust outside the support mechanisms 1.

[0019] Specifically, firstly, the two supporting mechanisms 1 are fixed on the ground of the coal seam, and then the top plate 2 is moved up and in close contact with the top surface of the coal seam by starting the two supporting mechanisms 1. If the top surface of the coal seam is uneven, firstly, the connecting plate 31 is moved to disengage the rack 32 from the gear 24 at the corresponding position, and then the top block 22 at the corresponding position can be moved by rotating the screw until all the top blocks 22 are in close contact with the uneven parts of the top surface of the coal seam, so that the flat top surface or the uneven top surface of the coal seam can be supported, and then the connecting plate 31 is moved to make the rack 32 mesh with the gear 24 at the corresponding position again, so that the gear 24 can be prevented from rotating, thereby preventing the screw from rotating. , so that the top block 22 can always be in contact with the top surface of the coal seam. Since the air in the coal seam contains a large amount of dust, in order to prevent the dust from entering the interior of the support mechanism 1, the cleaning mechanism 4 can be used to clean the adsorbed dust on the outside of the support mechanism 1 at the corresponding position to prevent the dust from entering the interior of the support mechanism 1, thereby avoiding the support mechanism 1 from being damaged by wear due to the presence of dust. The device meshes with the gear 24 at the corresponding position through the rack 32, which can lock the gear 24 to prevent the screw from rotating, so that the top block 22 can always be in contact with the top surface of the coal seam, thereby avoiding the screw from rotating due to vibration, causing the top block 22 to separate from the top surface of the coal seam and failing to achieve the purpose of supporting the coal seam. Example

[0020] like Figure 4 As shown, in this embodiment, both ends of the bottom surface of the top plate 2 are fixedly connected with a rectangular frame 33, the inner ends of the rectangular frame 33 are fixedly connected with a limit rod, the outer wall of the limit rod is slidably penetrated with a connecting block 34 fixedly connected to the connecting plate 31, and one side of the connecting block 34 is fixedly connected with a spring 35 fixedly connected to the rectangular frame 33 at the corresponding position.

[0021] In this embodiment, the elastic action of the two springs 35 can enable the rack 32 to always engage with the gear 24 at the corresponding position, and the gear 24 can be locked to prevent the screw from rotating, so that the top block 22 can always be in contact with the top surface of the coal seam, thereby preventing the top block 22 from being separated from the top surface of the coal seam due to external vibrations and the like. Example

[0022] like Figure 3 As shown, in this embodiment, two symmetrical limiting holes are formed through the inner bottom surface of the groove 21 corresponding to the threaded sleeve 23, and the outer wall of the threaded sleeve 23 is fixedly connected to the limiting holes corresponding to the limiting holes with limiting strips sliding through the limiting holes at the corresponding positions.

[0023] In this embodiment, by cooperating with the limiting strip and the limiting hole at the corresponding position, it is possible to prevent the threaded sleeve 23 and the top block 22 at the corresponding position from rotating when the screw is rotated, thereby allowing the top block 22 to move normally. Example

[0024] like Figure 2 As shown, in this embodiment, the support mechanism 1 includes a rectangular sleeve 11, a rectangular sleeve 12, and a hydraulic cylinder 13. The rectangular sleeve 11 is installed and fixed on the ground, the rectangular sleeve 12 is slidably sleeved inside the rectangular sleeve 11 at a corresponding position, the hydraulic cylinder 13 is fixedly connected between the inner bottom surface of the rectangular sleeve 11 and the inner top surface of the rectangular sleeve 12 at a corresponding position, and fans 14 are fixedly penetrated and fixed on the side of the rectangular sleeve 11 at equal intervals.

[0025] In this embodiment, the top plate 2 can be moved upward by starting the two hydraulic cylinders 13, so that the top plate 2 contacts the top surface of the coal seam, thereby achieving a supporting effect on the coal seam. Since the hydraulic cylinder 13 is continuously in an extended state and will be subjected to the reverse force exerted by the coal seam, the cylinder body of the hydraulic cylinder 13 will heat up. In order to prevent the heat of the hydraulic cylinder 13 from damaging its internal seals, the air in the rectangular sleeve 11 and the rectangular sleeve 2 12 at the corresponding positions can be extracted by starting multiple fans 14, thereby achieving the exchange of hot and cold gases outside the hydraulic cylinder 13 to cool the hydraulic cylinder 13. Therefore, it can be avoided that the hydraulic cylinder 13 is in an extended state for a long time, causing the cylinder body to heat up, thereby increasing the service life of the hydraulic cylinder 13. Example

[0026] like Figure 5 and Figure 6As shown, in this embodiment, the top ends of the two opposite side surfaces of the rectangular sleeve 11 are fixedly connected with fixed blocks 15, the cleaning mechanism 4 includes a circular frame 41, eight silicone sheets 42, two moving blocks 43, a reciprocating screw rod 44, and a motor 45. The circular frame 41 is slidably sleeved on the outer side of the rectangular sleeve 11 at the corresponding position, the eight silicone sheets 42 are respectively fixedly connected to the edges of the inner side surfaces of the circular frame 41 at the corresponding positions and contact with the outer side of the rectangular sleeve 2 at the corresponding positions, the two moving blocks 43 are fixedly connected to the opposite sides of the circular frame 41 at the corresponding positions, and the reciprocating screw rod 44 is connected to the outer side of the rectangular sleeve 12 at the corresponding positions. 4 is rotatably connected between the top plate 2 and the fixed block 15 at the corresponding position, the reciprocating screw rod 44 penetrates and is screwed with the moving block 43 at the corresponding position, the motor 45 is fixedly connected to the bottom surface of the fixed block 15 at the corresponding position, the output end of the motor 45 penetrates the fixed block 15 at the corresponding position and is fixedly connected to the reciprocating screw rod 44 at the corresponding position, the two ends of the bottom surface of the top plate 2 are respectively fixedly connected to the fixed block 15 at the corresponding position, and the guide rod 46 that penetrates and slides with the moving block 43 at the corresponding position is fixedly connected, and the two silicone sheets 42 located on the same inner side of the circular frame 41 form a V-shaped structure. .

[0027] In this embodiment, the reciprocating screw rod 44 can be driven by the motor 45 to drive the circular frame 41 and the eight silicone sheets 42 at the corresponding positions to move. Since the silicone sheets 42 are in contact with the outer side of the rectangular sleeve 12 at the corresponding positions, and the two silicone sheets 42 at the same position are in a V-shaped structure (such as Figure 6 As shown in the figure, the up and down movement of the circular frame 41 can scrape off the dust adsorbed on the outside of the rectangular sleeve 2 12 at the corresponding position, thereby preventing the dust from wearing the inner wall of the rectangular sleeve 11, and creating a larger gap between the rectangular sleeve 11 and the rectangular sleeve 2 12, so that the dust enters the interior of the rectangular sleeve 11 and the rectangular sleeve 2 12 through the gap and is adsorbed on the outer wall of the output end of the hydraulic cylinder 13, thereby protecting the hydraulic cylinder 13 and preventing the dust from wearing the output end of the hydraulic cylinder 13.

[0028] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0029] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A high stress support device for coal pillars in close distance coal seams, characterized in that: include: Two supporting mechanisms (1) for supporting the coal seam; A top plate (2) is fixedly connected between the two support mechanisms (1); a groove (21) is provided on the top surface of the top plate (2); a top block (22) is arranged inside the groove (21); a threaded sleeve (23) is fixedly connected to the bottom surface of the top block (22) and is slidably penetrated through the inner bottom surface of the groove (21) at a corresponding position; a screw is screwed inside the threaded sleeve (23); and a gear (24) is fixedly connected to the outer wall of the screw; A limiting mechanism (3) is arranged on the bottom surface of the top plate (2) and is used to limit the position of the plurality of screw rods, comprising a connecting plate (31) located below the top plate (2), wherein a rack (32) meshing with the gear (24) at a corresponding position is fixedly connected to a side surface of the connecting plate (31); Two cleaning mechanisms (4) are respectively arranged at corresponding positions on the outside of the support mechanism (1) and are used to clean dust on the outside of the support mechanism (1).

2. The high stress support device for coal pillars in close distance coal seams according to claim 1 is characterized in that: Both ends of the bottom surface of the top plate (2) are fixedly connected to a rectangular frame (33), a limit rod is fixedly connected between the two ends inside the rectangular frame (33), a connecting block (34) fixedly connected to the connecting plate (31) is slidably penetrated through the outer wall of the limit rod, and a spring (35) fixedly connected to the rectangular frame (33) at a corresponding position is fixedly connected to one side of the connecting block (34).

3. The high stress support device for coal pillars in close distance coal seams according to claim 1 is characterized in that: Two symmetrical limiting holes are formed through the inner bottom surface of the groove (21) at locations corresponding to the threaded sleeve (23), and limiting strips are fixedly connected to the outer wall of the threaded sleeve (23) at locations corresponding to the limiting holes and are slidably penetrated through the limiting holes at corresponding positions.

4. The high stress support device for coal pillars in close distance coal seams according to claim 1 is characterized in that: The supporting mechanism (1) comprises: A rectangular sleeve (11) is installed and fixed on the ground; A second rectangular sleeve (12) is slidably sleeved inside the first rectangular sleeve (11) at a corresponding position; The hydraulic cylinder (13) is fixedly connected between the inner bottom surface of the rectangular sleeve 1 (11) and the inner top surface of the rectangular sleeve 2 (12) at corresponding positions.

5. The high stress support device for coal pillars in close distance coal seams according to claim 4 is characterized in that: Fans (14) are fixedly mounted through the side surface of the rectangular sleeve (11) at equal intervals.

6. The high stress support device for coal pillars in close distance coal seams according to claim 4 is characterized in that: The top ends of the two opposite side surfaces of the rectangular sleeve (11) are fixedly connected with fixed blocks (15), and the cleaning mechanism (4) comprises: A circular frame (41) is slidably sleeved on the outer side of the rectangular sleeve (11) at a corresponding position; Eight silicone sheets (42) are respectively fixedly connected to the edges of the inner side of the circular frame (41) at corresponding positions and are in contact with the outer side of the rectangular sleeve 2 (12) at corresponding positions; Two moving blocks (43) are fixedly connected to opposite sides of the circular frame (41) at corresponding positions; A reciprocating screw rod (44) is rotatably connected between the top plate (2) and a fixed block (15) at a corresponding position, and the reciprocating screw rod (44) is screwed through and connected to a moving block (43) at a corresponding position; The motor (45) is fixedly connected to the bottom surface of the fixed block (15) at the corresponding position, and the output end of the motor (45) passes through the fixed block (15) at the corresponding position and is fixedly connected to the reciprocating screw rod (44) at the corresponding position.

7. The high stress support device for coal pillars in close distance coal seams according to claim 6 is characterized in that: Both ends of the bottom surface of the top plate (2) are fixedly connected to the fixed blocks (15) at corresponding positions, respectively, with guide rods (46) penetrating and sliding with the movable blocks (43) at corresponding positions.

8. The high stress support device for coal pillars in close distance coal seams according to claim 6 is characterized in that: The two silicone sheets (42) located on the same inner side of the circular frame (41) form a V-shaped structure.

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