Portable supporting frame for underground coal mine roadway

Abstract

The invention relates to the technical field of coal mine supporting, in particular to a coal mine underground roadway portable supporting frame which is provided with two sets of bases, supporting seats are evenly and fixedly connected to the top ends of the bases, and first movable plates are movably connected to the interiors of the supporting seats. The first movable plate can extend from the interior of the supporting base, the roadway supporting frame body at the top end abuts against the top of a roadway, so that the supporting effect is achieved, meanwhile, under the threaded connection relation, the guide plate can drive the supporting main feet at the bottom end to move downwards and be inserted into soil, and the stability of the device in the running process can be improved; and when the device is used, a series of movable reverse operations are carried out, so that the size of the device is reduced, convenience is brought to the transportation work of workers under the mutual cooperation of the fixed trundles, and the portable effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine support, and specifically provides a portable support frame for underground coal mine roadways. Background Art

[0002] Mine roadways are the general term for various underground spaces excavated in different rocks along different directions, at different dips, with different cross-sections and lengths, serving different scopes and for different purposes. Mine roadways are named and classified according to their spatial dimensions, dip directions, positions, service scopes, and uses, etc.

[0003] Chinese Patent Authorization Publication No. CN112855231B discloses a support device for underground coal mine roadways. The following deficiencies exist in this technical solution: in this technical solution and existing technical solutions, the bottom of the support frame is usually a flat rectangular support surface. However, the soil on the roadway ground is uneven and soft. The rectangular support surface at the bottom of the existing support frame is in contact with the uneven ground and is prone to instability under the vibration of machine operation. Therefore, there is still room for optimization on the existing support basis to improve market competitiveness. At the same time, the existing support frame is large in volume and not convenient for workers to transport and move. Therefore, there is room for improvement.

[0004] Chinese Patent Authorization Publication No. CN11786892B discloses a coal mine underground roadway driving advanced support device and its support method. The following deficiencies exist in this technical solution: this technical solution can adjust the height of the rectangular top frame by setting a lifting mechanism between the bottom frame and the rectangular top frame, and then realize the adjustment of the height of the arc-shaped channel steel. However, during the mining process, the phenomenon of coal mine roadway faults is likely to occur, resulting in uneven stress on the support, especially the support capacity in the curved arc area is relatively weak, posing certain safety hazards. Therefore, there is room for improvement.

[0005] Therefore, in order to improve the support performance of the support frame and its stability during operation, a portable support frame for underground coal mine roadways is proposed to solve the above-mentioned problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a portable support frame for underground coal mine roadways to solve the problems of instability during work and poor support force in weak areas of the support frame proposed in the above background art.

[0007] To achieve the above object, the present invention provides the following technical solution: A portable roadway support frame for underground coal mines is provided with a base, and there are two groups of the bases. The top ends of the bases are uniformly fixedly connected with support seats, and the inside of each support seat is movably connected with a first movable plate. The top end of the first movable plate is fixedly connected with a support seat, and the top ends of the support seats are uniformly connected with the roadway support frame body. Fixed casters are uniformly connected to both sides of the guide plate; it includes: a double-headed motor, which is arranged inside the base. Both ends of the double-headed motor are rotatably connected with rotating shafts, and the outer sides of the rotating shafts are respectively fixedly connected with second bevel gears. The upper and lower ends of the second bevel gears are respectively connected with a third bevel gear and a first bevel gear, and the third bevel gear and the first bevel gear are respectively meshed with the second bevel gear. An accommodation groove is arranged inside the support seat. The inside of the accommodation groove at the top end of the third bevel gear is connected with a first threaded rod. First guide thread grooves are arranged inside the first movable plates, and the first guide thread grooves are all threadedly connected with the first threaded rods. The bottom ends of the first bevel gears are all connected with second threaded rods. Second guide thread grooves are arranged at the bottom ends of the bases. The second threaded rods vertically penetrate through the inside of the second guide thread grooves. Guide plates are movably connected to the outer sides of the second threaded rods, and support main feet are uniformly connected to the bottom ends of the guide plates; a strengthening support mechanism is arranged inside the support main feet, which can improve the stability of the base during support and prevent it from becoming unstable due to soil reasons; a strengthening support mechanism, which is arranged outside the support seat, can further strengthen the support for the curved arc and weak parts of the roadway.

[0008] Preferably, the strengthening support mechanism includes built-in grooves, which are all arranged inside the support main feet. Electric push rods are connected to the top ends inside the built-in grooves, and movable blocks are connected to the top ends of the electric push rods. The two sides of the movable blocks are movably connected with second movable plates. Sliders are fixedly connected to both sides of the movable blocks. Chute grooves are arranged on the inner sides of the second movable plates, and the chute grooves are all slidably connected with the sliders. The inclined surfaces on the inner sides of the second movable plates are attached to the inclined surfaces on the outer sides of the movable blocks.

[0009] By setting the strengthening support mechanism, the stability of the support frame device can be strengthened on the basis of the existing support base. The support main feet inserted into the soil can play a preliminary support effect, and the strengthening support feet inserted into the soil again in a tree branch shape can further improve the support performance of the strengthening support mechanism, making the device in a stable state.

[0010] Preferably, through grooves are arranged on the outer sides of the support main feet, and cleaning brush hairs are uniformly connected to the inner sides of the through grooves, and the cleaning brush hairs and the through grooves are adsorbed and connected through hook surfaces and flannelette surfaces.

[0011] By installing cleaning bristles, during the retraction process of the strengthening support feet, soil will adhere to their surfaces. Preliminary cleaning of the soil adhering to their surfaces can bring convenience to the subsequent cleaning work of the staff.

[0012] Preferably, the widths of the sliding grooves are all equal to the widths of the sliders, and the sliding grooves and the sliders can guide and limit the movable block.

[0013] Preferably, strengthening support feet are uniformly and fixedly connected to the outer side of the second movable plate, and the strengthening support feet are distributed in a forked shape on the outer side of the second movable plate.

[0014] Preferably, the strengthening support mechanism includes a connecting frame, which is respectively arranged on one side of the support seats at both ends of the base. Both sides of one end of the connecting frame are respectively rotatably connected with a first rotating rod and a second rotating rod, and both the first rotating rod and the second rotating rod horizontally penetrate through the interior of the roadway support frame body. A first gear body and a second gear body are respectively fixedly connected to the outer sides of the first rotating rod and the second rotating rod. Rack bars are fixedly connected to the outer sides of the first movable plates, and the rack bars are all meshed and connected with the second gear bodies. Connecting plates are uniformly fixedly connected to the outer sides of the first rotating rod and the second rotating rod, and a first strengthening support plate and a second strengthening support plate are respectively connected to the tops of the connecting plates.

[0015] Through the angle presented when the first strengthening support plate and the second strengthening support plate are closed, which is triangular in shape like the roadway roof, the support force of the bent arc weak area can be strengthened, preventing the occurrence of collapse accidents and reducing potential safety hazards.

[0016] Preferably, the connecting plates are fixedly connected to the second strengthening support plate and the first strengthening support plate through triangular rib plates respectively. Reinforcing ribs are arranged inside the triangular rib plates, and the shapes of the reinforcing ribs are all set in a Z - shape.

[0017] By designing the shape of the reinforcing ribs in a Z - shape, the Z - shape has relatively strong compressive capacity, which can strengthen the strength of the triangular rib plates, further extending the service life and use value of the second strengthening support plate and the first strengthening support plate.

[0018] Preferably, when the second strengthening support plate and the first strengthening support plate rotate and close, the triangular structure formed between them has a certain stability, which can further strengthen the support.

[0019] Preferably, guide blocks are fixedly connected to both sides of the first movable plate. Guide grooves are arranged inside the support seats on both sides of the accommodating groove, and the guide grooves are all slidably connected with the guide blocks. The guide grooves and the guide blocks can guide and limit the first movable plate.

[0020] By the elongation and contraction of the first movable plate, the volume of the support frame device can be reduced, and with the mutual cooperation of the fixed casters, it is convenient for the staff to transport, playing a portable role.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: The portable support frame for underground coal mine roadways not only has a strengthened support mechanism to further strengthen the support for the weak area of the roadway bend arc, but also has a strengthened support mechanism to further enhance the stability when the main foot of the support is working.

[0022] 1. By starting the double-headed motor to drive the rotating shafts on both sides and the second bevel gears on the outside to rotate, and under the meshing connection, the first threaded rods and the second threaded rods at both ends can be synchronously driven to rotate. Under the action of threaded connection, the first movable plate will extend out from the inside of the support seat, and the roadway support frame body at the top will abut against the top of the roadway, thus playing a supporting role. At the same time, under the threaded connection relationship, the guide plate can drive the supporting main feet at the bottom to move downward and insert into the soil, which can improve the stability of the device during operation. When the use is completed, a series of operations are reversed, thereby reducing the volume of the device, and with the mutual cooperation of the fixed casters, it brings convenience to the transportation work of the staff, playing a portable role.

[0023] 2. Through the linkage effect, when the first movable plate drives the roadway support frame body to rise and contact the top of the roadway, the rack on its outside will also move upward. At the same time, under the meshing connection, the second gear body rotates in the opposite state to the first gear body, and further drives the second strengthened support plate and the first strengthened support plate on the outside of the first rotating rod and the second rotating rod to synchronously fold inward, and be in a triangular stable and safe area with the top of the roadway, thereby further enhancing the supporting performance of the device, preventing the occurrence of landslides in the weak area of the roadway bend arc, and thus reducing potential safety hazards.

[0024] 3. By setting a strengthened support mechanism, starting the electric push rod to drive the movable block to move downward, and under the sliding connection, it can further drive the second movable plates on both sides to move outward synchronously, and insert the strengthened support feet into the soil in a tree-like shape to enhance the stability of the supporting main feet, prevent the device from shaking and being unstable due to uneven road surfaces and the operation of the machine. At the same time, when the strengthened support feet are retracted into the supporting main feet, the soil adhering to the surface of the strengthened support feet can be preliminarily cleaned through the cleaning brush, which is convenient for the subsequent treatment by the staff. Subsequently, only by releasing the adsorption effect of the hook surface sticker and the flannel surface sticker support, it can be replaced regularly, effectively extending its service life and use value. Description of the Drawings

[0025] Figure 1Schematic diagram of the overall three-dimensional structure of the present invention;

[0026] Figure 2 Schematic diagram of the internal three-dimensional structure of the base side view of the present invention;

[0027] Figure 3 For the present invention Figure 1 Schematic diagram of the structure at position A in;

[0028] Figure 4 Schematic diagram of the three-dimensional structure of the main supporting feet of the present invention;

[0029] Figure 5 Schematic diagram of the three-dimensional structure of the combined strengthening support mechanism of the present invention;

[0030] Figure 6 Schematic diagram of the combined three-dimensional structure of the movable plate and the connecting frame on the side view of the present invention;

[0031] Figure 7 Schematic diagram of the three-dimensional structure when the first strengthening support plate and the second strengthening support plate of the present invention are closed;

[0032] Figure 8 Schematic diagram of the internal three-dimensional structure of the triangular rib plate of the present invention.

[0033] In the figure:

[0034] 1. Roadway support frame body; 2. Support seat; 3. Movable plate; 4. Support seat; 5. Base; 6. Guide plate; 7. Main supporting feet; 8. First guiding thread groove; 9. First threaded rod; 10. Accommodating groove; 11. Rotating shaft; 12. First bevel gear; 13. Double-headed motor; 14. Second threaded rod; 15. Second bevel gear; 16. Second guiding thread groove; 17. Third bevel gear; 18. Guide groove; 19. Guide block; 20. Connecting frame; 21. Rack; 22. First gear body;

[0035] 23. First rotating rod; 24. Reinforcing rib; 25. Connecting plate; 26. Triangular rib plate; 27. First strengthening support plate; 28. Through groove; 29. Strengthening support mechanism; 2901. Built-in groove; 2902. Electric push rod; 2903. Movable plate; 2904. Strengthening support feet; 2905. Movable block; 30. Slide groove; 31. Slide block; 32. Second rotating rod; 33. Second gear body; 34. Second strengthening support plate; 35. Cleaning brush bristles. Detailed implementation manners

[0036] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other solutions obtained by relevant personnel in the art without creative work compared with the embodiments of the present invention belong to the protection scope of the present invention.

[0037] Please refer to Figures 1 to 8 , the present invention provides a portable support frame for underground coal mine roadways, and the technical solution is as follows:

[0038] Embodiment 1

[0039] In order to solve the problems of large volume and inconvenience in carrying of the support frame in the prior art, the following solution is disclosed. Specifically, as shown in Figure 1 and Figure 2 , there are two groups of bases 5 provided. The top ends of the bases 5 are evenly and fixedly connected with support seats 4, and the inside of each support seat 4 is movably connected with a first movable plate 3. The top end of the first movable plate 3 is fixedly connected with a support seat 2, and the top ends of the support seats 2 are evenly connected with the roadway support frame body 1. Both sides of the guide plate 6 are evenly connected with fixed casters; it includes: a double-headed motor 13, which is arranged inside the base 5. Both ends of the double-headed motor 13 are rotatably connected with a rotating shaft 11, and the outer sides of the rotating shafts 11 are respectively fixedly connected with a second bevel gear 15. The upper and lower ends of the second bevel gear 15 are respectively connected with a third bevel gear 17 and a first bevel gear 12, and the third bevel gear 17 and the first bevel gear 12 are respectively meshed with the second bevel gear 15. The inside of the support seat 4 is provided with a receiving groove 10. The inside of the receiving groove 10 at the top end of the third bevel gear 17 is respectively connected with a first threaded rod 9. The inside of each first movable plate 3 is provided with a first guiding thread groove 8, and the first guiding thread grooves 8 are all threadedly connected with the first threaded rod 9. The bottom ends of the first bevel gears 12 are respectively connected with a second threaded rod 14. The bottom ends of the bases 5 are respectively provided with a second guiding thread groove 16. The second threaded rods 14 vertically penetrate through the inside of the second guiding thread grooves 16. The outer sides of the second threaded rods 14 are respectively movably connected with a guide plate 6, and the bottom ends of the guide plates 6 are evenly connected with support main feet 7. Both sides of the first movable plate 3 are fixedly connected with guide blocks 19. The inner sides of the support seats 4 on both sides of the receiving groove 10 are respectively provided with guide grooves 18, and the guide grooves 18 are all slidably connected with the guide blocks 19. The guide grooves 18 and the guide blocks 19 can guide and limit the first movable plate 3.

[0040] In this embodiment, when in use, the double-headed motor 13 is started to drive the rotating shaft 11 to rotate. Under the dual actions of threaded connection and gear connection, the first threaded rod 9 and the second threaded rod 14 can be synchronously driven to rotate, so as to further retract the first movable plate 3 into the inside of the support base 4 and retract the main support feet 7 to the bottom of the base 5. With the mutual cooperation of the fixed casters, not only can the volume of the device be reduced, but also it is convenient for transportation, playing a portable function. At the same time, this series of operations only require the operation of two groups of double-headed motors 13, saving resource costs.

[0041] Embodiment Two

[0042] This embodiment is different from Embodiment One. By setting a strengthening support mechanism, the weak areas can be further strengthened. Specifically, as shown in Figure 1 , Figure 3 , Figure 6 , Figure 7 and Figure 8 , the strengthening support mechanism is arranged on the outside of the support base 4 and can further strengthen the support for the curved arc and weak areas of the roadway. The strengthening support mechanism includes a connecting frame 20, which is respectively arranged on one side of the support bases 4 at both ends of the base 5. On both sides of one end of the connecting frame 20, a first rotating rod 23 and a second rotating rod 32 are respectively rotatably connected. The first rotating rod 23 and the second rotating rod 32 both horizontally penetrate through the inside of the roadway support frame body 1. A first gear body 22 and a second gear body 33 are respectively fixedly connected to the outer sides of the first rotating rod 23 and the second rotating rod 32. Rack bars 21 are fixedly connected to the outer sides of the first movable plates 3, and the rack bars 21 are all meshed and connected with the second gear body 33. Connecting plates 25 are uniformly fixedly connected to the outer sides of the first rotating rod 23 and the second rotating rod 32, and a first strengthening support plate 27 and a second strengthening support plate 34 are respectively connected to the tops of the connecting plates 25. The connecting plates 25 are fixedly connected to the second strengthening support plate 34 and the first strengthening support plate 27 through triangular rib plates 26 respectively. Reinforcing ribs 24 are arranged inside the triangular rib plates 26, and the shapes of the reinforcing ribs 24 are all set in a Z shape. When the second strengthening support plate 34 and the first strengthening support plate 27 rotate and close together, the triangular structure formed between them has a certain stability, which can further strengthen the support.

[0043] In this embodiment, during the process of the first movable plate 3 extending, it will drive the rack bar 21 to move upward synchronously. At the same time, under the action of meshing connection, it drives the second gear body 33 to rotate in the opposite state to the first gear body 22, further causing the second strengthening support plate 34 and the first strengthening support plate 27 on the outer sides of the first rotating rod 23 and the second rotating rod 32 to synchronously retract inward and be in a triangular stable safety area with the top of the roadway, thereby further strengthening the support performance of the device and reducing potential safety hazards.

[0044] Embodiment Three

[0045] This embodiment is different from Embodiment 1 and Embodiment 2. By setting the strengthening support mechanism 29, the stability of the main support foot 7 during support can be further enhanced. Specifically, as Figure 4 and Figure 5 shown, the strengthening support mechanism 29 is arranged inside the main support foot 7, which can improve the stability of the base 5 during support and prevent it from becoming unstable due to soil reasons. The strengthening support mechanism 29 includes built-in grooves 2901, which are all arranged inside the main support foot 7. Electric push rods 2902 are connected to the tops of the built-in grooves 2901, and movable blocks 2905 are connected to the tops of the electric push rods 2902. Second movable plates 2903 are movably connected to both sides of the movable block 2905. Sliders 31 are fixedly connected to both sides of the movable block 2905. Chute grooves 30 are arranged on the inner sides of the second movable plates 2903, and the chute grooves 30 are slidably connected to the sliders 31. The inclined surfaces on the inner sides of the second movable plates 2903 are in contact with the inclined surfaces on the outer sides of the movable block 2905. Through grooves 28 are arranged on the outer sides of the main support feet 7, and cleaning brush hairs 35 are evenly connected to the inner sides of the through grooves 28. The cleaning brush hairs 35 and the through grooves 28 are adsorbed and connected through hook-and-loop fasteners. The widths of the chute grooves 30 are equal to the widths of the sliders 31. The chute grooves 30 and the sliders 31 can guide and limit the movable block 2905. Strengthening support feet 2904 are evenly and fixedly connected to the outer sides of the second movable plates 2903, and the strengthening support feet 2904 are distributed in a tree-branch shape on the outer sides of the second movable plates 2903.

[0046] In this embodiment, during use, the installation of the main support foot 7 can initially enhance the support effect. With the mutual operation and cooperation of the strengthening support mechanism 29, the strengthening support feet 2904 can be deeply rooted in the soil in a tree-branch shape, further improving the stability of the main support foot 7 during support and preventing the device from shaking during operation. At the same time, the cleaning brush hairs 35 can clean the soil attached to the surface of the strengthening support feet 2904 when they are retracted.

[0047] Working principle: First, move the support frame device to a suitable position. At this time, start the double-headed motor 13 to drive the third bevel gears 17 on both sides and the second bevel gear 15 on the outside to rotate. While the second bevel gear 15 is rotating, under the meshing connection, it synchronously drives the third bevel gear 17, the first bevel gear 12, the first threaded rod 9, and the second threaded rod 14 to rotate in opposite directions. With the cooperation of the threaded connection, the first movable plate 3 starts to move upward, and the guide plate 6 starts to move downward, stretching the entire device, making the roadway support frame body 1 abut against the top of the roadway and making the main support foot 7 take root in the soil;

[0048] Secondly, when the first movable plate 3 drives the roadway support frame body 1 to move upward, under the meshing connection of the rack 21 and the second gear body 33, the second gear body 33 and the first gear body 22 can be driven to rotate inward synchronously, further driving the outer connecting plate 25 and the second strengthening support plate 34 and the first strengthening support plate 27 at the top to start closing, so as to resist the weak area of the roadway arc with a fixed and stable structure, further improving the supporting performance of the roadway support frame body 1;

[0049] Finally, start the electric push rod 2902 to drive the movable block 2905 to move downward, and under the action of the sliding connection, the second movable plates 2903 on both sides can be further driven to move outward synchronously, and the strengthening support feet 2904 are inserted into the soil in a fork shape, so as to strengthen the stability of the main support feet 7 and further strengthen the stability of the device.

[0050] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0051] The device embodiments described above are only illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative labor.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A portable roadway support frame for underground coal mines is provided with a base (5), and there are two sets of it. The top of the base (5) is evenly fixedly connected with support seats (4), and the inside of each support seat (4) is movably connected with a first movable plate (3). The top of the first movable plate (3) is fixedly connected with a support seat (2), and the top of the support seat (2) is evenly connected with the roadway support frame body (1). Both sides of the guide plate (6) are evenly connected with fixed casters; It is characterized in that It includes: A double-headed motor (13) which is arranged inside the base (5). Both ends of the double-headed motor (13) are rotatably connected with a rotating shaft (11), and the outside of the rotating shaft (11) is respectively fixedly connected with a second bevel gear (15). The upper and lower ends of the second bevel gear (15) are respectively connected with a third bevel gear (17) and a first bevel gear (12), and the third bevel gear (17) and the first bevel gear (12) are respectively meshed and connected with the second bevel gear (15). An accommodation groove (10) is arranged inside the support seat (4). Inside the accommodation groove (10) at the top of the third bevel gear (17), a first threaded rod (9) is connected. Inside the first movable plate (3), a first guiding thread groove (8) is arranged, and the first guiding thread groove (8) is threadedly connected with the first threaded rod (9). The bottom ends of the first bevel gears (12) are respectively connected with a second threaded rod (14). At the bottom of the base (5), a second guiding thread groove (16) is arranged. The second threaded rod (14) vertically penetrates through the inside of the second guiding thread groove (16). The outside of the second threaded rod (14) is movably connected with a guide plate (6), and the bottom of the guide plate (6) is evenly connected with a main support foot (7); A strengthening support mechanism (29) is arranged inside the main support foot (7), which can improve the stability of the base (5) during support and prevent it from becoming unstable due to soil reasons; A strengthening support mechanism is arranged outside the support seat (4), which can further strengthen the support for the curved arc and weak parts of the roadway.

2. The portable support frame for underground coal mine roadway according to claim 1, wherein: The strengthening support mechanism (29) includes an internal groove (2901), which is arranged inside the main support foot (7). At the top inside the internal groove (2901), an electric push rod (2902) is connected, and the top of the electric push rod (2902) is connected with a movable block (2905). Both sides of the movable block (2905) are movably connected with a second movable plate (2903). Both sides of the movable block (2905) are fixedly connected with sliding blocks (31). Inside the inner side of the second movable plate (2903), a sliding groove (30) is arranged, and the sliding groove (30) is slidably connected with the sliding block (31). The inclined surface on the inner side of the second movable plate (2903) is in contact with the inclined surface on the outside of the movable block (2905).

3. The portable support frame for underground coal mine roadways according to claim 2, wherein: Both sides of the main support foot (7) are provided with through grooves (28), and the inner sides of the through grooves (28) are evenly connected with cleaning brush hairs (35), and the cleaning brush hairs (35) are adsorbed and connected with the through grooves (28) through hook surface stickers and flannel stickers.

4. The portable supporting frame for underground roadway in coal mine according to claim 2, characterized in that: The widths of the given slider (31) are equal, and the widths of the chute (30) and the slider (31) both guide and limit the movable block (2905).

5. The portable support frame for underground coal mine roadway according to claim 2, wherein: On the outer side of the second movable plate (2903), reinforcing support feet (2904) are uniformly and fixedly connected. The reinforcing support feet (2904) are distributed in a forked shape on the outer side of the second movable plate (2903).

6. The portable support frame for underground coal mine roadway according to claim 1, wherein: The reinforcing support mechanism includes a connecting frame (20), which is respectively arranged on one side of the support seats (4) at both ends of the base (5). On both sides of one end of the connecting frame (20), a first rotating rod (23) and a second rotating rod (32) are respectively rotationally connected. The first rotating rod (23) and the second rotating rod (32) both horizontally penetrate through the interior of the roadway support frame body (1). On the outer sides of the first rotating rod (23) and the second rotating rod (32), a first gear body (22) and a second gear body (33) are respectively fixedly connected. On the outer sides of the first movable plates (3), racks (21) are fixedly connected, and the racks (21) are both meshed with the second gear body (33). On the outer sides of the first rotating rod (23) and the second rotating rod (32), connecting plates (25) are uniformly fixedly connected, and the tops of the connecting plates (25) are respectively connected with a first reinforcing support plate (27) and a second reinforcing support plate (34).

7. The portable support frame for underground coal mine roadway according to claim 6, wherein: The connecting plates (25) are fixedly connected to the second reinforcing support plate (34) and the first reinforcing support plate (27) through triangular rib plates (26). Reinforcing ribs (24) are arranged inside the triangular rib plates (26), and the shapes of the reinforcing ribs (24) are all arranged in a Z shape.

8. A portable support frame for underground coal mine roadways according to claim 7, characterized in that: When the second reinforcing support plate (34) and the first reinforcing support plate (27) rotate and close, the triangular structure formed between them. The triangle has a certain stability, which can further strengthen the support.

9. The portable support frame for underground coal mine roadways according to claim 1, characterized in that: On both sides of the first movable plate (3), guide blocks (19) are fixedly connected. On the inner sides of the support seats (4) on both sides of the receiving groove (10), guide grooves (18) are arranged, and the guide grooves (18) are both slidably connected to the guide blocks (19). The guide grooves (18) and the guide blocks (19) can guide and limit the first movable plate (3).

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