CN219733423U - Support frame with anti-offset structure for coal mine - Google Patents
Support frame with anti-offset structure for coal mine Download PDFInfo
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- CN219733423U CN219733423U CN202320811605.3U CN202320811605U CN219733423U CN 219733423 U CN219733423 U CN 219733423U CN 202320811605 U CN202320811605 U CN 202320811605U CN 219733423 U CN219733423 U CN 219733423U
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- 239000003245 coal Substances 0.000 title claims abstract description 24
- 238000001125 extrusion Methods 0.000 claims description 12
- 238000010030 laminating Methods 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000013508 migration Methods 0.000 claims description 3
- 244000309464 bull Species 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to a support frame with an anti-offset structure for a coal mine, which comprises a support plate, wherein support rods are fixedly connected to the bottom of the support plate near the left side and the right side, fixing plates are sleeved on the edges of the outer sides of the support rods near the bottom, the adjacent fixing plates are mutually attached, a plurality of mounting grooves are formed in the sides, far away from the support rods, of the fixing plates, the anti-offset structure is convenient to mount on the support frame through mutual matching among the components, the operation is simple, the friction coefficient between the fixing plates and the support rods is increased, the mounting stability of the anti-offset structure is improved, the support rods can be supported, the offset of the support rods is prevented, the stability of the support frame is improved, the use of workers is facilitated, and meanwhile, the fixing rods can be conveniently detached, so that the partial support frame can be detached and replaced, and the subsequent use of the support frame is facilitated.
Description
Technical Field
The utility model relates to the technical field of coal mine safety, in particular to a support frame with an anti-offset structure for coal mine.
Background
With the development of society, the technical field of coal mine safety is greatly improved, coal mine is a reasonable space dug by human beings when mining geological formations rich in coal, generally comprises a roadway, a pit, a mining face and the like, coal is the most main solid fuel, is one of combustible organic rocks, is a flourishing plant growing in a certain geological period, is gradually piled up into a thick layer in a proper geological environment, is buried in water bottom or sediment, is formed by natural coal formation in a long geological period, and in the prior art, the existing coal mine safety measures are mainly safety support frames, and the support frames are often processed into U-shaped and are arranged at the inner wall of the coal mine, but the following problems still exist.
Support frames in the prior art are generally provided with a support plate and a support rod to be connected, the support rod is arranged to be cylindrical, but in coal mine collection, the ground is extremely easy to shake, the support rod is easy to shake, the outer wall of the support rod of the existing device is not provided with an anti-shifting structure, if shaking is serious, the support rod is extremely easy to place and shift, and the support frame is inconvenient for workers to use, so that the support frame with the anti-shifting structure for coal mine needs to be designed to solve the problem.
Disclosure of Invention
The utility model aims to provide a support frame with an anti-offset structure for a coal mine, which solves the problems in the background art.
The technical scheme of the utility model is that the support frame with the anti-offset structure for the coal mine comprises a support plate, support rods are fixedly connected to the left side and the right side of the bottom of the support plate, fixing plates are sleeved on the edges of the outer sides of the support rods, which are close to the bottom, of the support rods, one sides of the adjacent fixing plates, which are close to the adjacent fixing plates, are mutually attached, a plurality of mounting grooves are formed in one sides of the fixing plates, which are far away from the support rods, of the support rods, plug-in blocks are movably connected to inner cavities of the mounting grooves, positioning holes are formed in the positions, which are close to the centers, of the tops and the bottoms of the plug-in blocks, grooves are formed in the tops and the bottoms of the inner cavities of the mounting grooves, grooves are fixedly connected with positioning springs on one sides, which are close to the adjacent plug-in blocks, of the positioning springs are close to the adjacent plug-in blocks, positioning springs are fixedly connected with positioning rods on one sides, which are close to the adjacent plug-in blocks, of the positioning rods are fixedly connected to one sides of the adjacent positioning rods, one sides, which are close to the adjacent support rods, of the adjacent support rods are far away from the centers of the adjacent support rods, of the inner cavities, are movably connected to one sides, and the inner cavities, which are far away from the adjacent support rods, of the adjacent support rods are movably connected to one sides of the positioning rods.
In one embodiment, a plurality of the connecting rods are close to the adjacent support rods, the top ends of the connecting rods are close to the adjacent support rods, the fixing blocks are fixedly connected to the ends of the fixing rods close to the adjacent support rods, the locating grooves are formed in the positions, close to the bottoms, of the fixing plates, of the sides, close to the adjacent support rods, of the fixing blocks, and the ends, close to the adjacent support rods, of the fixing blocks are spliced in the inner cavities of the adjacent locating grooves.
In one embodiment, a plurality of fixed block inner chamber top is kept away from the equal fixedly connected with first bearing of one side of adjacent bracing piece, a plurality of first bearing inner chamber all runs through and is equipped with the bull stick, a plurality of equal fixedly connected with rotating plate in bull stick top, a plurality of equal fixedly connected with initiative bevel gear in bull stick bottom, a plurality of fixed block inner chamber top and bottom are kept away from the equal fixedly connected with riser in one side of adjacent bracing piece, a plurality of equal fixedly connected with second bearing of department near the center on the riser, a plurality of the second bearing inner chamber all runs through and is equipped with the threaded rod, a plurality of the threaded rod is kept away from the equal fixedly connected with driven bevel gear of one end of adjacent bracing piece, a plurality of be intermeshing setting between initiative bevel gear and the adjacent driven bevel gear.
In one embodiment, a plurality of the threaded rod outside edge is close to the equal meshing of one end of adjacent bracing piece and is equipped with the screwed pipe, a plurality of the screwed pipe is close to the equal fixedly connected with extrusion piece of one end of adjacent bracing piece, a plurality of the riser is close to one side of adjacent bracing piece and is close to the equal fixedly connected with spacing pipe of top and bottom, a plurality of the equal swing joint of spacing pipe inner chamber has the stopper, a plurality of the stopper is close to the equal fixedly connected with gag lever post of one side of adjacent bracing piece, a plurality of the gag lever post is close to the one end of adjacent bracing piece and all runs through adjacent spacing pipe inner chamber to with fixed connection between the adjacent extrusion piece.
In one embodiment, a plurality of through-holes have all been seted up to one side that fixed block top and bottom are close to adjacent bracing piece, a plurality of the through-hole inner chamber all runs through and is equipped with the trace, and is adjacent the equal fixedly connected with interlock piece of one end that the trace is close to, is adjacent for laminating each other between one side that the interlock piece is close to all and the adjacent extrusion piece, adjacent one side that the interlock piece is kept away from all is close to the left and right sides and is all fixedly connected with interlock spring jointly with adjacent fixed block inner chamber, a plurality of equal fixedly connected with slider of center department is close to one side that the interlock piece is close to adjacent bracing piece, a plurality of the spout has all been seted up to one side that the fixed block inner chamber is close to adjacent bracing piece, a plurality of the slider all is located adjacent spout inner chamber, a plurality of blind hole has all been seted up at constant head tank inner chamber top and bottom, and is adjacent the one end that the trace is kept away from all pegged graft in adjacent blind hole inner chamber.
In one embodiment, a plurality of the connecting rod bottom all fixedly connected with antiskid ribbed tile, a plurality of the antiskid ribbed tile is last all to have seted up the perforation, and a plurality of the perforation inner chamber all runs through and is equipped with the staple.
In one embodiment, a plurality of equal fixedly connected with slipmat of fixed plate inner chamber, a plurality of slipmat all sets up for laminating each other with adjacent bracing piece between, adjacent the equal fixedly connected with connecting plate of one side that both sides are close to around the fixed plate, adjacent one side that the connecting plate is close to sets up for laminating each other, a plurality of screw hole has all been seted up near top and bottom on the connecting plate, adjacent screw hole inner chamber joint is equipped with fixing bolt.
The beneficial effects provided by the utility model are as follows:
through mutually supporting between each part for this anti-migration structure is convenient for install on the support frame, easy operation, and has increased the coefficient of friction between fixed plate and the bracing piece, thereby has improved the steadiness that this anti-migration structure was installed, and can support the bracing piece, prevents that the bracing piece from taking place the skew, has improved the stability of support frame, and the staff's of being convenient for uses, can be convenient for dismantle the dead lever simultaneously, thereby can dismantle the change to local support frame, the follow-up use of support frame of being convenient for.
Drawings
FIG. 1 is a front view of the present utility model;
FIG. 2 is a top view of the component mounting plate of the present utility model;
FIG. 3 is an enlarged view of FIG. 1 at A;
FIG. 4 is an enlarged view of FIG. 1 at B;
fig. 5 is an enlarged view of fig. 1 at C.
In the attached drawings, 1, a supporting plate; 2. a support rod; 3. a fixing plate; 4. a connecting plate; 5. a fixing bolt; 6. a connecting rod; 7. a fixed rod; 8. an anti-slip pad; 9. a plug block; 10. a positioning spring; 11. a positioning block; 12. a movable rod; 13. a positioning rod; 14. a fixed block; 15. a rotating rod; 16. a rotating plate; 17. a driving bevel gear; 18. a driven bevel gear; 19. a threaded rod; 20. a threaded tube; 21. extruding a block; 22. a linkage block; 23. a linkage rod; 24. a linkage spring; 25. a cleat; 26. and (5) fixing nails.
Detailed Description
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The technical solution of the present utility model will be further described below with reference to the accompanying drawings of the embodiments of the present utility model, and the present utility model is not limited to the following specific embodiments.
It should be understood that the same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components. In the description of the present utility model, it should be understood that, if there are terms such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", etc., that indicate an azimuth or a positional relationship based on the directions or the positional relationships shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but not for indicating or suggesting that the apparatus or element to be referred to must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limitations of the present patent, and that the specific meanings of the terms described above may be understood by those skilled in the art according to specific circumstances.
In an embodiment, as shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, a support frame with anti-deflection structure for coal mine, which comprises a supporting plate 1, the support plate 1 bottom is close to the equal fixedly connected with bracing piece 2 of left and right sides, two bracing piece 2 outside edges are close to bottom department and all overlap and are equipped with fixed plate 3, one side that adjacent fixed plate 3 is close to mutually is laminating each other and sets up, a plurality of mounting groove has all been seted up to one side that bracing piece 2 was kept away from to a plurality of fixed plate 3, a plurality of mounting groove inner chamber equal swing joint has jack 9, a plurality of jack 9 top and bottom are close to central department and all set up the locating hole, a plurality of mounting groove inner chamber top and bottom all set up flutedly, a plurality of recess inner chamber is kept away from the equal fixedly connected with positioning spring 10 in one side that adjacent jack 9, a plurality of positioning spring 10 is close to the equal fixedly connected with locating piece 11 in one end that adjacent jack 9, a plurality of locating piece 11 is close to one side that adjacent jack 9 is equal fixedly connected with locating rod 13, a plurality of locating piece 13 is close to one end that adjacent jack 9 is all set up in the locating hole inner chamber, a plurality of mounting groove inner chamber 2 is close to one side that adjacent jack 2 is kept away from adjacent jack 2, a plurality of adjacent jack 2 is equal to the equal swing joint groove inner chamber 12 is kept away from adjacent jack 2 with adjacent jack 2, a plurality of jack 2 is kept away from adjacent jack 2.
The fixing rods 7 can be disassembled and replaced, in the embodiment, as shown in fig. 4, the fixing rods 7 are fixedly connected at the positions, close to the top ends, of the adjacent support rods 2, of the plurality of connecting rods 6, the fixing blocks 14 are fixedly connected at the positions, close to the bottom ends, of the adjacent support rods 2, of the plurality of fixing plates 3, the positioning grooves are formed at the positions, close to the bottom ends, of the adjacent support rods 2, of the plurality of fixing blocks 14, the inner cavities of the adjacent positioning grooves are spliced at the inner cavities of the adjacent positioning grooves, the first bearings are fixedly connected at the positions, far from the adjacent support rods 2, of the tops of the inner cavities of the plurality of fixing blocks 14, the rotating rods 15 are fixedly connected with the rotating plates 16 in a penetrating manner, the driving bevel gears 17 are fixedly connected at the bottom ends of the rotating rods 15, the tops and bottoms of the inner cavities of the fixed blocks 14 are fixedly connected with risers together on one side far away from the adjacent supporting rods 2, second bearings are fixedly connected on one side, close to the center, of the plurality of risers, threaded rods 19 are arranged in a penetrating manner, driven bevel gears 18 are fixedly connected on one ends, far away from the adjacent supporting rods 2, of the plurality of threaded rods 19, meshed with the driven bevel gears 18, threaded pipes 20 are arranged on one ends, close to the adjacent supporting rods 2, of the outer edges of the plurality of threaded rods 19, threaded pipes 20 are fixedly connected with extrusion blocks 21 on one ends, close to the adjacent supporting rods 2, of the plurality of risers, limiting pipes are fixedly connected on one sides, close to the tops and the bottoms, of the adjacent supporting rods 2, limiting pipes are movably connected with limiting blocks on the inner cavities of the plurality of limiting pipes, one side that a plurality of stopper is close to adjacent bracing piece 2 is equal fixedly connected with gag lever post, a plurality of gag lever post is close to adjacent bracing piece 2's one end all runs through adjacent spacing pipe inner chamber, and fixedly connected with between the adjacent extrusion piece 21, a plurality of fixed block 14 top and bottom are close to adjacent bracing piece 2's one side all offered the through-hole, a plurality of through-hole inner chamber all runs through and is equipped with interlock pole 23, adjacent interlock pole 23 is equal fixedly connected with interlock piece 22 of one end that is close to mutually, adjacent interlock piece 22 is all set up for laminating each other between the adjacent extrusion piece 21, adjacent interlock piece 22 is close to the left and right sides that is kept away from mutually all with adjacent fixed block 14 inner chamber common fixedly connected with interlock spring 24, a plurality of interlock piece 22 is close to adjacent bracing piece 2's one side and is close to the equal fixedly connected with slider in the center department, a plurality of fixed block 14 inner chamber is close to adjacent bracing piece 2's one side all offered the spout, a plurality of slider all is located adjacent spout inner chamber, a plurality of constant head tank inner chamber top and bottom all offered the blind hole, adjacent interlock pole 23 is kept away from mutually one end and is all pegged graft in adjacent blind hole inner chamber.
Play the effect that prevents antiskid ribbed tile 25 slip, in this embodiment, as shown in fig. 5, the equal fixedly connected with antiskid ribbed tile 25 of a plurality of connecting rod 6 bottom, all offered the perforation on a plurality of antiskid ribbed tile 25, a plurality of perforation inner chamber all runs through and is equipped with staple 26.
Be convenient for install fixed plate 3 at bracing piece 2 outside edge, in this embodiment, as shown in fig. 1, fig. 2, the equal fixedly connected with slipmat 8 of a plurality of fixed plate 3 inner chamber, be laminating the setting each other between a plurality of slipmat 8 and the adjacent bracing piece 2, the equal fixedly connected with connecting plate 4 of one side that both sides are close to each other around the adjacent fixed plate 3, the one side that adjacent connecting plate 4 is close to each other is laminating the setting each other, screw holes have all been seted up near top and bottom on a plurality of connecting plate 4, the mutual meshing of adjacent screw hole inner chamber is equipped with fixing bolt 5.
Working principle: when the anti-deviation structure is used, the coal mine can be supported through the arrangement of the supporting plate 1 and the supporting rod 2, at the moment, the adjacent fixing plates 3 are sleeved on the outer side edge of the supporting rod 2, the bottoms of the plurality of anti-deviation plates 25 are mutually attached to the ground through adjusting the heights of the adjacent fixing plates 3, at the moment, the adjacent fixing plates 3 can be fixed on the outer side edge of the supporting rod 2 through the plurality of fixing bolts 5, so that the anti-deviation structure is convenient to install on a supporting frame, the operation is simple, the friction coefficient between the fixing plates 3 and the supporting rod 2 can be increased through the arrangement of the plurality of anti-deviation pads 8, the installation stability of the anti-deviation structure is improved, the supporting rod 2 is prevented from deviating through the arrangement of the plurality of connecting rods 6 and the anti-deviation plates 25, the stability of the supporting frame is improved, the use of workers is facilitated, the anti-skid plate 25 is prevented from sliding by inserting a plurality of fixing nails 26 into the soil, the stability of the supporting frame is further improved, the use effect is improved, when the connecting rod 6 is damaged and needs to be replaced, the fixing nails 26 are taken out of the soil, the rotating plate 16 is rotated, the rotating plate 16 drives the rotating rod 15 to rotate, the rotating rod 15 drives the driving bevel gear 17 to rotate, the driving bevel gear 17 drives the driven bevel gear 18 to rotate, the driven bevel gear 18 drives the threaded rod 19 to rotate, the threaded rod 19 drives the threaded pipe 20 to move towards the side far away from the supporting rod 2, the threaded pipe 20 drives the extrusion block 21 to move, the extrusion block 21 does not have extrusion effect on the adjacent linkage blocks 22, the adjacent linkage blocks 22 can be driven to move inwards under the elastic action of the plurality of linkage springs 24, so that a plurality of linkage rods 23 are separated from the inner cavities of the adjacent blind holes, at the moment, the adjacent movable rods 12 are pulled to two sides, the positioning block 11 is driven to move by the movable rods 12, the positioning rod 13 is driven to move by the positioning block 11, the positioning rod 13 is separated from the adjacent positioning holes, so that the fixing rod 7 can be conveniently detached, the local support frame can be detached and replaced, and the subsequent use of the support frame is convenient.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (7)
1. The utility model provides a colliery is with support frame that has anti-migration structure, its characterized in that, including the backup pad, backup pad bottom is close to the equal fixedly connected with bracing piece of left and right sides, two bracing piece outside edge is close to the equal cover of bottom and is equipped with the fixed plate, and is adjacent one side that the fixed plate is close to mutually is laminating the setting each other, a plurality of mounting groove has all been seted up to one side that the fixed plate kept away from the bracing piece, a plurality of equal swing joint in mounting groove inner chamber has the jack, a plurality of jack top and bottom are close to center department and all set up the locating hole, a plurality of all set up flutedly in mounting groove inner chamber top and bottom the equal fixedly connected with locating spring of one side that adjacent jack was kept away from to the recess inner chamber, a plurality of equal fixedly connected with locating spring is close to the equal fixedly connected with locating piece of one end that adjacent jack, a plurality of locating piece is close to one side that adjacent jack is equal fixedly connected with locating lever, a plurality of adjacent jack one side that adjacent jack is close to the locating lever is all pegged graft in adjacent locating piece inner chamber, a plurality of the equal swing joint has the equal cavity that adjacent jack is kept away from to one side that adjacent jack is all kept away from to the adjacent jack.
2. The support frame with anti-offset structure for coal mines according to claim 1, wherein a plurality of fixing rods are fixedly connected to the positions, close to the top ends, of one sides of the connecting rods, close to the adjacent supporting rods, fixing blocks are fixedly connected to the positions, close to the bottom ends, of one sides, close to the adjacent supporting rods, of the fixing plates, locating grooves are formed, and one ends, close to the adjacent supporting rods, of the fixing blocks are spliced in inner cavities of the adjacent locating grooves.
3. The support frame with anti-offset structure for coal mines according to claim 2, wherein one side, far away from adjacent support rods, of the top of the inner cavity of each fixing block is fixedly connected with a first bearing, one end, far away from adjacent support rods, of each inner cavity of each first bearing is provided with a rotating rod in a penetrating mode, one end, far away from adjacent support rods, of each inner cavity of each fixing block is fixedly connected with a driving bevel gear, one end, far away from adjacent support rods, of each inner cavity of each fixing block is fixedly connected with a vertical plate, one side, far away from adjacent support rods, of each bottom of each fixing block is fixedly connected with a second bearing, one end, far away from adjacent support rods, of each second bearing inner cavity is provided with a threaded rod in a penetrating mode, one end, far away from adjacent support rods, of each threaded rod is fixedly connected with a driven bevel gear, and each driving bevel gear and each adjacent driven bevel gear are in a mutual meshing mode.
4. The support frame with anti-offset structure for coal mines according to claim 3, wherein a plurality of threaded rods are provided with threaded pipes in a meshed mode at the outer edges of the threaded rods, the threaded pipes are fixedly connected with extrusion blocks at the ends of the threaded pipes, the vertical plates are fixedly connected with limit pipes at the tops and bottoms of the sides of the vertical plates, the limit pipes are movably connected with limiting blocks, limit rods are fixedly connected with the sides of the limiting blocks, the limit rods penetrate through the inner cavities of the adjacent limit pipes, and the limit rods are fixedly connected with the adjacent extrusion blocks.
5. The support frame with anti-offset structure for coal mines according to claim 4, wherein through holes are formed in one sides, close to adjacent support rods, of the tops and bottoms of the fixing blocks, through holes are formed in one sides, close to adjacent support rods, of the through holes in the inner cavities of the fixing blocks, connecting blocks are fixedly connected to one ends, close to the adjacent connecting blocks, of the connecting blocks, mutually attached to adjacent extrusion blocks, connecting springs are fixedly connected to the inner cavities of the adjacent fixing blocks in a mutual mode, close to the left side and the right side, of the connecting blocks, close to the adjacent support rods, of the connecting blocks, sliding blocks are fixedly connected to the inner cavities of the adjacent support rods in a mutual mode, sliding grooves are formed in one sides, close to the adjacent support rods, of the inner cavities of the fixing blocks, the sliding blocks are located in the inner cavities of the adjacent sliding grooves, blind holes are formed in the tops and the bottoms of the inner cavities of the fixing grooves, and the adjacent connecting blocks are connected to the inner cavities of the blind holes in an inserting mode.
6. The support frame with anti-deviation structure for coal mine as claimed in claim 1, wherein the bottom ends of the connecting rods are fixedly connected with antiskid plates, the antiskid plates are provided with perforations, and the inner cavities of the perforations are provided with fixing nails.
7. The support frame with anti-offset structure for coal mines according to claim 1, wherein the inner cavities of the fixing plates are fixedly connected with anti-slip pads, the anti-slip pads are mutually attached to adjacent support rods, connecting plates are fixedly connected to adjacent sides, which are close to each other, of the front side and the rear side of the fixing plates, threaded holes are formed in the connecting plates, which are close to the top and the bottom, of the adjacent connecting plates, and fixing bolts are arranged in a mutual engagement mode in the inner cavities of the threaded holes.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202320811605.3U CN219733423U (en) | 2023-04-13 | 2023-04-13 | Support frame with anti-offset structure for coal mine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN202320811605.3U CN219733423U (en) | 2023-04-13 | 2023-04-13 | Support frame with anti-offset structure for coal mine |
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CN219733423U true CN219733423U (en) | 2023-09-22 |
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CN202320811605.3U Active CN219733423U (en) | 2023-04-13 | 2023-04-13 | Support frame with anti-offset structure for coal mine |
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- 2023-04-13 CN CN202320811605.3U patent/CN219733423U/en active Active
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