Coal mine underground operation platform and operation method thereof

Abstract

The invention discloses a coal mine underground working platform and a working method thereof, and the working platform comprises a supporting platform which is provided with a supporting surface and a connecting surface which are opposite to each other; the leg mechanism is arranged on the connecting surface of the supporting platform and used for supporting the supporting platform, and the leg mechanism is configured to be capable of performing switching motion between a first position for lifting the supporting platform and a second position for lowering the supporting platform; the leg mechanism is further configured to be capable of performing switching motion between an unfolded position and a folded position; the folding mechanism is connected between the leg mechanism and the supporting platform and is configured to be capable of performing switching motion between an extended supporting position and a retracted folding position, and when the folding mechanism is located at the supporting position, the leg mechanism is located at the unfolding position; when the folding mechanism is located at the folding position, the leg mechanism is located at the contraction position.

Description

Technical Field

[0001] This invention relates to the field of underground coal mine operation equipment, and more particularly to an underground coal mine operation platform and its operation method. Background Technology

[0002] Typical cross-sectional dimensions of underground roadways are 3-4 meters wide and 2.8-3.5 meters high. A large number of operations must be carried out within this 3-meter height range. For example, ventilation duct installation, damper adjustment, and ventilation duct suspension are generally located between 2.5 and 3.2 meters in height; roof anchoring, anchor bolt installation, and roadway roof reinforcement must be completed within this range; gas monitoring probes, roof displacement sensors, and communication equipment are mostly installed at 2.5-3 meters; drainage pipes, compressed air pipes, and fire-fighting pipelines are typically laid 2.5-3.5 meters from the roadway floor, often with irregular cross-sections and uneven floors. Under normal operating conditions, transport vehicles, ventilation equipment, and safety facilities already occupy some space, leaving narrow working passages, and the locations of working points frequently change as the working face advances.

[0003] The average standing working height for adult miners is approximately 2.2-2.4 meters (including arm reach), but many underground work sites exceed this range by 0.5-1.5 meters, creating a significant "working height gap." This gap forces workers to maintain an elevated arm position for extended periods, accelerating muscle fatigue and severely compromising work accuracy, especially for tasks requiring precise alignment such as anchor bolt installation and sensor calibration. Furthermore, it significantly increases safety hazards, raising the risk of instability due to a loss of balance.

[0004] Currently, the following are commonly used in underground operations: 1. Traditional scaffolding, which has the problems of numerous components, difficult transportation, individual component lengths often exceeding the minimum curvature radius allowed by the tunnel, time-consuming assembly (averaging 30-60 minutes), large space occupation, and obstruction of other equipment passage. 2. Ladder-type equipment, which has the problems of excessively wide A-frame ladders (often reaching 1.2-1.5 meters when unfolded), obstructing tunnel passage, lacking guardrails and other protective facilities, and posing significant risks to high-altitude operations. 3. Temporary stacking platforms, which use material boxes, equipment, etc. for temporary stacking, have extremely poor stability, are difficult to adjust in height, and cannot be fine-tuned for adaptation. Violation of safety regulations leads to extremely high accident risks. Therefore, there is an urgent need for a portable coal mine underground work platform and its operation method that can provide workers with an adjustable-height work platform suitable for various underground operating environments. Summary of the Invention

[0005] This solution addresses the problems and needs raised above by proposing an underground coal mine operation platform and its operation method. Due to the adoption of the following technical features, it can achieve the above-mentioned technical objectives and bring about several other technical benefits.

[0006] One object of the present invention is to provide an underground working platform for coal mines, comprising: The support platform has a supporting surface and a connecting surface; A leg mechanism is provided on the connecting surface of the support platform for supporting the support platform, and the leg mechanism is configured to switch between raising the support platform to a first position and lowering the support platform to a second position; the leg mechanism is also configured to switch between an unfolded position and a folded position. A folding mechanism, connected between the leg mechanism and the support platform, is configured to switch between an extended support position and a retracted folding position, wherein when the folding mechanism is in the support position, the leg mechanism is in the extended position; and when the folding mechanism is in the folded position, the leg mechanism is in the retracted position.

[0007] In addition, the underground coal mine operation platform and its operation method according to the present invention may also have the following technical features: In one example of the present invention, the leg mechanism includes: The outer shell has a receiving cavity and is hinged to the connecting surface; The inner rod is telescopically connected within the receiving cavity and contacts the ground. A connector is disposed between the inner rod and the outer shell, configured to adjust the position of the inner rod within the outer shell.

[0008] In one example of the present invention, the connector includes: A sliding groove is formed along the extending direction of the outer casing, and the sliding groove has a plurality of stop grooves arranged along the extending direction and connected to the sliding groove; A hook locking plate is connected to the inner rod body. The hook locking plate has a locking pin, which is configured to be compatible with any one of the multiple gear slots. A first elastic element is connected between the hook locking plate and the inner rod body, configured such that the hook locking plate has an elastic force that allows it to move from the sliding groove toward the gear slot.

[0009] In one example of the invention, the hook-lock plate includes: The main body and the arcuate portion connected to the main body are provided with the locking pin and the arcuate portion is provided with a recessed groove. The inner rod body has an installation groove, which includes a snap-fit ​​groove and a movable groove connected thereto, and a protrusion is formed between the snap-fit ​​groove and the movable groove. The arc-shaped portion is adapted to the snap-fit ​​groove, the main body portion is adapted to the movable groove, and the first elastic member is connected between the main body portion and the movable groove, so that when the recessed groove and the protrusion are engaged, the main body portion can move towards the movable groove on the side where the gear slot is set under the action of elastic force.

[0010] In one example of the present invention, the connector further includes a sliding limiting plate, which is slidably disposed on the inner rod body, and the sliding limiting plate is provided with a limiting groove adapted to the locking pin, and the sliding limiting plate can switch between limiting the locking pin to a limiting position and releasing the locking pin to a releasing position.

[0011] In one example of the present invention, the limiting groove includes: a main body groove and a limiting body disposed in the main body groove; when the sliding limiting plate moves to a limited position, the locking pin abuts against the limiting body to limit the position of the locking pin so that it does not move into the gear groove when moving in the sliding groove; when the sliding limiting plate moves to a release position, the locking pin does not abut against the limiting body so that it moves directly into the gear groove when moving in the sliding groove.

[0012] In one example of the present invention, the folding mechanism includes: The linkage assembly includes at least two sequentially hinged links, wherein one end of at least one link is hinged to the connecting surface, and one end of at least another link is hinged to the leg mechanism, and the at least two sequentially hinged links are capable of switching between a support position with an angle of 180 degrees between them and a folded position with an angle of less than 180 degrees between them.

[0013] In one example of the present invention, the folding mechanism includes: The second elastic element, one end of which is connected to at least one of the links and the other end of which is connected to at least another link, is configured such that at least two links have a tendency force to rotate relative to each other about the hinge point from the support position to the folded position. Specifically, when the included angle between at least two hinged links is 180 degrees, the two hinged links are at a dead point, and the second elastic element cannot cause the at least two links to rotate around the hinge point; when the included angle between at least two hinged links is less than 180 degrees, the second elastic element causes the at least two links to rotate around the hinge point.

[0014] In one example of the invention, a locking assembly is further included, comprising a latch and a locking ring, respectively disposed on both sides of the support platform. When the operating platform comprises multiple platforms, in two adjacent support platforms, the latch on one support platform is connected to the locking ring on the other support platform.

[0015] Another object of the present invention is to provide an operating method for an underground coal mine working platform as described above, comprising the following steps: S10: Find a suitable location at the construction site in the coal mine and drive the folding mechanism to switch the leg mechanism from the folded position to the unfolded position; S20: Adjust the leg mechanism so that it can switch from a second position lowering the height of the support platform to a first position raising the height of the support platform to adjust to a suitable height; wherein, the sliding limit plate moves to the limited position so that when the locking pin moves in the sliding groove, it will not move into the gear slot position due to the limitation of the sliding limit plate; when the inner rod moves to the first position, the sliding limit plate is adjusted to the release position. At this time, the sliding limit plate will not limit the position of the locking pin, so that when the locking pin moves in the sliding groove, it will directly move into the gear slot position; S30: After construction is completed, the leg mechanism is sequentially switched from the first position of raising the height of the support platform to the second position of lowering the height of the support platform, and the folding mechanism is driven to switch the leg mechanism from the unfolded position to the folded position; wherein, the sliding limit plate moves to the limited position, so that when the locking pin moves in the sliding groove, it will not move into the gear slot due to the limitation of the sliding limit plate; when the inner rod moves to the first position, the sliding limit plate is adjusted to the release position. At this time, the sliding limit plate will not limit the position of the locking pin, so that when the locking pin moves in the sliding groove, it will move directly into the gear slot when it moves into the gear slot.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention can adapt to the inclination angle of the downhole floor and provide stable load bearing under uneven floor conditions.

[0017] This invention employs a purely mechanical height adjustment and locking mechanism, avoiding the use of electrical components, fundamentally eliminating the risk of electrical sparks, and meeting the Class I explosion-proof environment requirements for coal mines.

[0018] This invention allows a single person to complete the entire process of platform transportation, deployment, height adjustment, and positioning without the need for additional auxiliary personnel, greatly reducing the manpower requirements. This invention uses a multi-section sleeve-type column with pin positioning to flexibly adjust its support height; for example, it provides five standard heights: 2.0m, 2.3m, 2.6m, 2.9m, and 3.2m. This invention features rapid adjustment and convenient folding and retraction, making it easy for a single worker to carry and transfer. It is suitable for the work requirements of continuous advancement during underground tunnel excavation. For example, the time required for the equipment to go from the folded state to complete the height adjustment is no more than 5 minutes, and it only takes 10 seconds to retract the legs.

[0019] This invention enables the splicing of multiple work platforms, making it suitable for situations where multiple people work together, and further improving safety performance.

[0020] The preferred embodiments of the invention will be described in more detail below with reference to the accompanying drawings, so as to facilitate an understanding of the features and advantages of the invention. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. The drawings are merely illustrative of some embodiments of the present invention and are not intended to limit the scope of the present invention to all embodiments.

[0022] Figure 1 This is a front view of a coal mine underground working platform according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of an underground coal mine work platform according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the folding mechanism according to an embodiment of the present invention; Figure 4 for Figure 3 A magnified view of a portion of point Q; Figure 5 This is a schematic diagram of the leg mechanism according to an embodiment of the present invention; Figure 6 An exploded view of the leg mechanism according to an embodiment of the present invention; Figure 7 for Figure 6 A magnified view of a portion of point Q; Figure 8 This is a schematic diagram of the structure of the sliding limiting plate according to an embodiment of the present invention.

[0023] List of reference numerals in the attached diagram: Operating platform 100; Support platform 10; Support surface 11; Connection surface 12; Support frame 13; Crossbar 131; Longitudinal bar 132; Leg mechanism 20; Outer shell 21; Inner rod 22; Mounting slot 221; Card slot 2211; Activity slot 2212; Connector 23; Sliding groove 231; Gear slot 2311; Hook lock plate 232; Main body 2321; Arc-shaped part 2322; Lock pin 2323; 2324 recessed groove; First elastic element 233; Sliding limit plate 234; Limiting groove 2341; Main body groove 23411; Limiting body 23412; Limited to position 2342; Release position 2343; Fixed rod 24; Folding mechanism 30; Linkage assembly 31; Link 311; Hinge point 312; Limiting component 32; Second elastic element 321; Locking component 40; Lock 41; Locking ring 42. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0025] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, “an” or “a” and similar terms do not necessarily indicate a quantity limitation. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0026] According to a first aspect of the present invention, a coal mine underground working platform 100, such as Figure 1 and Figure 2 As shown, it includes: The support platform 10 has a supporting surface 11 and a connecting surface 12. A leg mechanism 20 is disposed on the connecting surface 12 of the support platform 10 for supporting the support platform 10, and the leg mechanism 20 is configured to switch between raising the support platform 10 to a first position and lowering the support platform 10 to a second position; the leg mechanism 20 is also configured to switch between an unfolded position and a folded position. The folding mechanism 30 is connected between the leg mechanism 20 and the support platform 10 and is configured to switch between an extended support position and a retracted folding position. When the folding mechanism 30 is in the support position, the leg mechanism 20 is in the extended position; when the folding mechanism 30 is in the folded position, the leg mechanism 20 is in the retracted position.

[0027] The working principle of the coal mine precision operation platform 100 is as follows: A suitable location is found at the underground construction site in the coal mine, and the folding mechanism 30 is driven to switch the leg mechanism 20 from the folded position to the unfolded position; the leg mechanism 20 is adjusted so that it can switch from a second position lowering the height of the support platform 10 to a first position raising the height of the support platform 10 to adjust to a suitable height; after construction is completed, the leg mechanism 20 is sequentially switched from the first position raising the height of the support platform 10 to the second position lowering the height of the support platform 10, and the folding mechanism 30 is driven to switch the leg mechanism 20 from the unfolded position to the folded position.

[0028] This invention is foldable and retractable, making it easy for a single worker to carry and transfer, and is suitable for the continuous advancement of underground tunnel excavation. This invention has a connecting and fixing device, which allows for the splicing of multiple work platforms 100, suitable for multi-person collaborative work, and further improves safety performance.

[0029] This work platform can adapt to the inclination angle of the underground floor and maintain stable load-bearing under uneven floor conditions. It employs a purely mechanical height adjustment and locking mechanism, avoiding the use of electrical components and fundamentally eliminating the risk of electrical sparks, meeting the Class I explosion-proof environment requirements of coal mines. A single person can complete the entire process of transporting, unfolding, adjusting the height, and positioning the platform without additional auxiliary personnel, significantly reducing manpower requirements. The platform uses multi-section sleeve-type columns with pin positioning, flexibly adjusting its support height; for example, it provides five standard heights: 2.0m, 2.3m, 2.6m, 2.9m, and 3.2m. The platform is quick to adjust and easy to fold and retract, facilitating single-person transport and is suitable for the continuous advancement required during underground tunnel excavation. For example, the time required to adjust the height from the folded state is no more than 5 minutes, and retracting the legs takes only 10 seconds. Multiple work platforms can be spliced ​​together, suitable for multi-person operations, further improving safety performance.

[0030] In one example of the present invention, such as Figure 5 , Figure 6 and Figure 7 The leg mechanism 20 includes: The outer shell 21 has a receiving cavity and is hinged to the connecting surface 12; The inner rod 22 is telescopically connected within the receiving cavity and contacts the ground; Connector 23 is disposed between the inner rod 22 and the outer shell 21, and is configured to adjust the position of the inner rod 22 within the outer shell 21; Specifically, the inner rod 22 and the outer shell 21 are connected by a connector 23. The connector 23 allows the inner rod 22 to move or be fixed within the cavity of the outer shell 21, thereby adjusting the position of the inner rod 22 within the outer shell 21. This allows for the overall extension and retraction of the leg mechanism 20 to accommodate different working heights. When using the leg mechanism 20, it is first fully retracted. Then, the position of the inner rod 22 relative to the outer shell 21 is adjusted using the connector 23 to achieve a suitable working height, thus completing the erection of the work platform 100 and facilitating subsequent construction.

[0031] In one example of the present invention, such as Figure 7 As shown, the connector 23 includes: A sliding groove 231 is formed along the extending direction of the outer shell 21, and the sliding groove 231 has a plurality of stop grooves 2311 arranged along the extending direction and connected to the sliding groove 231. Hook locking plate 232 is connected to the inner rod body 22. Hook locking plate 232 has locking pin 2323, which is configured to be compatible with any one of the multiple stop slots 2311. The first elastic element 233 is connected between the hook locking plate 232 and the inner rod body 22, and is configured to give the hook locking plate 232 an elastic force that moves from the sliding groove 231 toward the stop groove 2311. Specifically, an installation groove 221 is provided on the inner rod body 22. The installation groove 221 includes a snap-fit ​​groove 2211 and a movable groove 2212. One end of the hook-lock plate 232 is snapped into the snap-fit ​​groove 2211, and the other end of the hook-lock plate 232 is located in the movable groove 2212. An elastic element is located in the movable groove 2212, with one end connected to the hook-lock plate 232 and the other end connected to the movable groove 2212. For example, the elastic element is a compression spring. Connecting blocks are formed at the lower end of the device and on the movable groove 2212, respectively. Elastic elements are respectively sleeved on the connecting blocks, so that the hook locking plate 232 located in the movable groove 2212 always has an upward tendency. That is, when the inner rod 22 is located in the sliding groove 231 and moves along the extension direction of the sliding groove 231, when it moves to the stop groove 2311, under the action of the elastic force of the elastic element, the locking pin 2323 on the hook locking plate 232 moves into the stop groove 2311.

[0032] When using the leg mechanism 20, the initial position of the leg mechanism 20 is to adjust the position of the locking pin 2323 in the sliding groove 231 so that the leg mechanism 20 is in a fully retracted state; then, by adjusting the position of the locking pin 2323 of the hook locking plate 232 in the sliding groove 231, the leg mechanism 20 is in an extended state. When the leg mechanism 20 is in a suitable position, the locking pin 2323 of the hook locking plate 232 moves to the corresponding stop groove 2311 under the action of the elastic element, thereby fixing the position of the inner rod 22 in the housing so that it can reach a suitable working height and complete the erection of the working platform 100; by setting the leg mechanism 20, the height of the support platform 10 can be flexibly adjusted, thereby facilitating subsequent construction.

[0033] In one example of the present invention, the hook-lock plate 232 includes: The main body 2321 and the arcuate portion 2322 connected to the main body 2321 are provided with the locking pin 2321 and the arcuate portion 2322 is provided with a recessed groove 2324. The inner rod body 22 has an installation groove 221, which includes a snap-fit ​​groove 2211 and a movable groove 2212 connected thereto, and a protrusion 2213 is formed between the snap-fit ​​groove 2211 and the movable groove 2212. The arc-shaped portion 2322 is adapted to the snap-fit ​​groove 2211, and the main body portion 2321 is adapted to the movable groove 2212. The first elastic member 233 is connected between the main body portion 2321 and the movable groove 2212, so that when the recessed groove 2324 cooperates with the protrusion 2213, the main body portion 2321 can move towards the movable groove 2212 on the side of the set position groove 2311 under the action of elastic force.

[0034] Specifically, the inner contour of the snap-fit ​​groove 2211 is similar to the outer contour structure of the arc-shaped part 2322, so that the arc-shaped part 2322 can snap into the snap-fit ​​groove 2211. The opening area of ​​the movable groove 2212 is larger than that of the matching main body part 2321, so that the main body part 2321 can move in the movable groove 2212. For example, the movable groove 2212 has movable space on both sides of the main body part 2321, so that the main body part 2321 can swing on both sides of the movable groove 2212. The first elastic member 233 is connected to one side of the two sides, so that the main body part 2321 has a tendency to move to one side of the two sides. It should be noted that the side of the main body part 2321 that moves is the side of the sliding groove 231 where the stop groove 2311 is set.

[0035] Preferably, the first elastic element 233 is a tension spring or a compression spring; for example, such as Figure 6 As shown, the first elastic element 233 is a tension spring, causing the main body 2321 to tend to move towards the first elastic element 233. When the locking pin 2321 moves along the sliding groove 231 to the stop groove 2311, the locking pin 2321 moves into the stop groove 2311 under the elastic force of the first elastic element 233, thereby limiting the position of the inner rod 22. When the first elastic element 233 is a compression spring, its position is opposite to the above position, and the specific principle is similar to that described above, so it will not be repeated here.

[0036] In one example of the present invention, such as Figure 8 As shown, the connector 23 further includes a sliding limiting plate 234, which is slidably disposed on the inner rod body 22, and the sliding limiting plate 234 is provided with a limiting groove 2341 adapted to the locking pin 2323. The sliding limiting plate 234 can switch between limiting the locking pin at a limiting position 2342 and releasing the locking pin at a releasing position 2343.

[0037] Specifically, the sliding limiting plate 234 has a groove-shaped structure, which is snapped onto the inner rod 22 as a whole. The sliding limiting plate 234 and the inner rod 22 are connected by a sliding mechanism. For example, the sliding mechanism includes a sliding groove provided along the extension direction of both sides of the inner rod 22, and a sliding rail provided along the extension direction of both sides of the sliding limiting plate, and the sliding groove is adapted to the sliding rail. For another example, the sliding rail has a T-shaped structure, which allows the sliding rail to slide in the sliding groove without slipping off.

[0038] When the inner rod 22 extends or retracts relative to the outer shell 21, it is necessary to move the inner rod 22 to a designated position, such as when the length of the inner rod 22 needs to be adjusted over a large range. At this time, the sliding limit plate 234 is moved to the limited position 2342. The sliding limit plate 234 will limit the position of the locking pin 2323, so that when the locking pin 2323 moves in the sliding groove 231, it will not move into the gear slot 2311 because the sliding limit plate 234 prevents the locking pin 2323 from moving into the gear slot 2311. When the inner rod 22 moves to the designated position, the sliding limit plate 234 is adjusted to the release position 2343. At this time, the sliding limit plate 234 will not limit the position of the locking pin 2323, so that when the locking pin 2323 moves in the sliding groove 231, it will move directly into the gear slot 2311 when it moves into the gear slot 2311. For situations where the length of the inner rod 22 needs to be adjusted within a small range, simply adjust the sliding limit plate 234 to the release position 2343.

[0039] The sliding limit plate 234 described above allows for flexible and rapid adjustment of the inner rod 22 within the outer shell 21, greatly accelerating the adjustment efficiency of the work platform.

[0040] In one example of the present invention, the limiting groove 2341 includes: a main groove 23411 and a limiting body 23412 disposed in the main groove 23411; when the sliding limiting plate 234 moves to the limiting position 2342, the locking pin abuts against the limiting body 23412 to limit the position of the locking pin so that it does not move into the gear groove 2311 when it moves in the sliding groove 231; when the sliding limiting plate 234 moves to the release position 2343, the locking pin does not abut against the limiting body 23412 so that it moves directly into the gear groove 2311 when it moves in the sliding groove 231.

[0041] Specifically, the main groove 23411 has a frame structure, and the limiting body 23412 is fixedly installed inside the main groove 23411. For example, it can be installed near the lower end of the main groove 23411. When the inner rod 22 extends or retracts relative to the outer shell 21, it is necessary to move the inner rod 22 to a designated position, such as when a large range of adjustment of the length of the inner rod 22 is required. At this time, the sliding limiting plate 234 is moved to the limited position 2342. At this time, the limiting body 23412 abuts against the locking pin 2323 to prevent the locking pin 2323 from continuing to move to that side, thus realizing the sliding... The movable limiting plate 234 limits the position of the locking pin 2323, so that when the locking pin 2323 moves in the sliding groove 231, it will not move into the gear slot 2311 due to the limiting body 23412. When the inner rod 22 moves to the designated position, the sliding limiting plate 234 is adjusted to the release position 2343. At this time, the sliding limiting plate 234 will not contact the limiting body 23412, so that when the locking pin 2323 moves in the sliding groove 231, it will move directly into the gear slot 2311 when it reaches the gear slot 2311. It should be noted that the limiting plate is set on the side closer to the gear slot 2323.

[0042] In one example of the present invention, the connector 23 includes two connectors, symmetrically arranged on both sides of the inner rod 22. Specifically, mounting slots 221 are symmetrically opened on both sides of the inner rod 22 for mounting hook locking plates 232. In order to make the movement of the two connectors 23 consistent, the two hook locking plates 232 can be fixedly connected by a fixed shaft to realize the synchronous movement of the two connectors 23. By setting two connectors 23, the relative movement and connection reliability and safety between the inner rod 22 and the outer shell 21 can be greatly improved.

[0043] In one example of the present invention, such as Figure 2 , Figure 3 and Figure 4 As shown, the folding mechanism 30 includes: The linkage assembly 31 includes at least two sequentially hinged links 311, wherein one end of at least one link 311 is hinged to the connecting surface 12, and one end of at least another link 311 is hinged to the leg mechanism 20. The at least two sequentially hinged links 311 are capable of switching between a supported position with an angle of 180 degrees between them and a folded position with an angle less than 180 degrees between them. For example, the support platform 10 also includes a support frame 13 disposed at the lower end of the connecting surface 12, which is connected to the leg mechanism 20, and the link 12 can be hinged to the support frame. As another example, such as... Figure 3As shown, the support frame 13 includes two parallel horizontal bars 131 and two vertical bars 132 fixedly connected between the two horizontal bars 131. The connecting rod 311 can be hinged to the vertical bar 132. The leg mechanism 20 includes four members, and two adjacent leg mechanisms 20 are fixedly connected by a fixing rod 24. In the connecting rod assembly 31, one connecting rod 311 is hinged to the fixing rod 24, and the other connecting rod 311 is hinged to the vertical bar 132.

[0044] Specifically, at a suitable location in the underground coal mine construction site, the folding mechanism 30 is driven to switch the connecting rod assembly 31 from the folded position to the supporting position, i.e., the angle between the two sequentially hinged connecting rods 311 is 180 degrees; the leg mechanism 20 is adjusted so that it can switch from a second position lowering the height of the supporting platform 10 to a first position raising the height of the supporting platform 10 to adjust to a suitable height; after construction is completed, the leg mechanism 20 is sequentially switched from the first position raising the height of the supporting platform 10 to the second position lowering the height of the supporting platform 10, and the folding mechanism 30 is driven to switch the connecting rod assembly 31 from the supporting position to the folded position, i.e., the angle between the two sequentially hinged connecting rods 311 is 180 degrees, thus completing the folding.

[0045] It should be noted that the maximum range of the included angle between the two hinged links 311 is 180 degrees and the minimum range of the included angle is 0 degrees. For example, a limiting plate is fixed on one of the links 311, which extends from the link 311 in a direction away from the link 311, so that when the other link 311 is at a 180-degree angle to it, the position of the other link 311 is limited.

[0046] In one example of the present invention, such as Figure 3 and Figure 4 As shown, the folding mechanism 30 includes: The second elastic element 321 has one end connected to at least one of the connecting rods 311 and the other end connected to at least another of the connecting rods 311, configured such that at least two connecting rods 311 have a tendency force to rotate relative to each other about the hinge point 312 from the support position to the folded position. Specifically, when the included angle between at least two hinged links 311 is 180 degrees, the two hinged links 311 are in a dead position, and the second elastic element 321 cannot make the at least two links 311 rotate around the hinge point 312; when the included angle between at least two hinged links 311 is less than 180 degrees, the second elastic element 321 makes the at least two links 311 rotate around the hinge point 312.

[0047] A suitable location is found at the construction site in the coal mine. The folding mechanism 30 is driven to switch the connecting rod assembly 31 from the folding position to the supporting position. At this time, the two hinged connecting rods 311 are in the dead point position, and the second elastic element 321 cannot make at least two connecting rods 311 rotate around the hinge point 312. The leg mechanism 20 is adjusted so that it can switch from the second position of lowering the height of the supporting platform 10 to the first position of raising the height of the supporting platform 10 to adjust to a suitable height. After the construction is completed, the leg mechanism 20 is switched from the first position of raising the height of the supporting platform 10 to the second position of lowering the height of the supporting platform 10. By applying external force to at least two hinged connecting rods 311, when the included angle between at least two hinged connecting rods 311 is less than 180 degrees, at least two connecting rods 311 rotate around the hinge point 312 under the action of the second elastic element 321, driving the folding mechanism 30 to switch the connecting rod assembly 31 from the supporting position to the folding position, thus completing the folding.

[0048] Of course, the present invention is not limited thereto. The limiting component 32 may further include: a second elastic member 321, one end of which is connected to at least one of the connecting rods 311 and the other end of which is connected to at least another of the connecting rods 311, configured such that at least two connecting rods 311 rotate relative to each other with a tendency force to switch from a supported position to a folded position; and a limiting post, connecting at least two adjacent connecting rods 311 such that at least two connecting rods 311 can be held in the supported position. In other words, the limiting post fixes the position of the two connecting rods 311 by engaging with the hinge point of the two adjacent connecting rods 311. For example, the two connecting rods have an overlapping area after hinge, and the limiting post fixes the overlapping area formed by the two connecting rods 311 by passing through and fixing it, thereby achieving the purpose of fixation. Specifically, when a suitable position is found at the construction site in the coal mine, the folding mechanism 30 is driven to switch the connecting rod assembly 31 from the folding position to the supporting position, and the position of the connecting rod assembly 31 is fixed by the limiting post of the limiting component 32 to limit the connecting rod assembly 31. The leg mechanism 20 is adjusted so that it can switch from the second position of lowering the height of the supporting platform 10 to the first position of raising the height of the supporting platform 10 to adjust to a suitable height. After the construction is completed, the leg mechanism 20 is switched from the first position of raising the height of the supporting platform 10 to the second position of lowering the height of the supporting platform 10 in sequence, and the degree of freedom of the limiting post of the connecting rod assembly 31 is canceled by the limiting component 32. The folding mechanism 30 is then driven to switch the connecting rod assembly 31 from the supporting position to the folding position to complete the folding.

[0049] In one example of the present invention, a locking assembly 40 is also included, comprising a latch 41 and a locking ring 42, respectively disposed on both sides of the support platform 10. When the working platform comprises multiple platforms, in two adjacent support platforms 10, the latch 41 on one support platform 10 is connected to the locking ring 42 on the other support platform 10 to increase the support area of ​​the support platform 10.

[0050] For example, a latch 41 and a locking ring 42 are respectively provided on both symmetrical ends of the connection surface 12 of the support platform 10. When multiple support platforms 10 are needed, the latch 41 on one support platform 10 locks the locking ring 42 of the adjacent support platform 10 to complete the connection of the support platforms 10.

[0051] It is understandable that the locking component 40 is a known existing mechanism, and will not be described in detail here.

[0052] According to a second aspect of the present invention, a method for operating a coal mine underground work platform 100 as described above includes the following steps: S10: Find a suitable location at the construction site in the coal mine and drive the folding mechanism 30 to switch the leg mechanism 20 from the folded position to the unfolded position; S20: Adjust the leg mechanism 20 so that it can switch from a second position lowering the height of the support platform 10 to a first position raising the height of the support platform 10 to adjust to a suitable height; wherein, the sliding limit plate 234 moves to the limiting position 2342, so that when the locking pin 2323 moves in the sliding groove 231, it will not move into the gear slot 2311 due to the limitation of the sliding limit plate 234; when the inner rod 22 moves to the first position, the sliding limit plate 234 is adjusted to the release position 2343. At this time, the sliding limit plate 234 will not limit the position of the locking pin 2323, so that when the locking pin 2323 moves in the sliding groove 231, it will move directly into the gear slot 2311 when it moves into the gear slot 2311. S30: After construction is completed, the leg mechanism 20 is switched from the first position of raising the height of the support platform 10 to the second position of lowering the height of the support platform 10, and the folding mechanism 30 is driven to switch the leg mechanism 20 from the unfolded position to the folded position; wherein, the sliding limit plate 234 moves to the limiting position 2342, so that when the locking pin 2323 moves in the sliding groove 231, it will not move into the gear slot 2311 due to the limitation of the sliding limit plate 234; when the inner rod 22 moves to the second position, the sliding limit plate 234 is adjusted to the release position 2343. At this time, the sliding limit plate 234 will not limit the position of the locking pin 2323, so that when the locking pin 2323 moves in the sliding groove 231, it will directly move into the gear slot 2311 when it moves into the gear slot 2311.

[0053] This invention is foldable and retractable, making it easy for a single worker to carry and transfer, and is suitable for the continuous advancement of underground tunnel excavation. This invention has a connecting and fixing device, which allows for the splicing of multiple work platforms 100, suitable for multi-person collaborative work, and further improves safety performance.

[0054] This operating method can adapt to the inclination angle and unevenness of the underground floor, ensuring stable load-bearing capacity. It employs a purely mechanical height adjustment and locking mechanism, avoiding the use of electrical components and fundamentally eliminating the risk of electrical sparks, thus meeting the Class I explosion-proof environment requirements of coal mines. A single person can complete the entire process of platform transportation, deployment, height adjustment, and positioning without additional auxiliary personnel, significantly reducing manpower requirements. The platform uses multi-section sleeve-type columns with pin positioning, flexibly adjusting its support height; for example, it provides five standard heights: 2.0m, 2.3m, 2.6m, 2.9m, and 3.2m. The method allows for rapid adjustment and convenient folding and retraction, facilitating single-person transport and is suitable for the continuous advancement required during underground tunnel excavation. For example, the time required to adjust the height from the folded state is no more than 5 minutes, and retracting the legs takes only 10 seconds. Multiple platforms can be spliced ​​together using the locking assembly 40, suitable for multi-person operations and further improving safety performance.

[0055] The foregoing description, with reference to preferred embodiments, details exemplary implementations of the coal mine underground working platform 100 and its operating method proposed in this invention. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of this invention, and various combinations can be made to the various technical features and structures proposed in this invention without exceeding the protection scope of this invention, which is determined by the appended claims.

Claims

1. A coal mine underground working platform, characterized in that, include: The support platform (10) has a supporting surface (11) and a connecting surface (12). A leg mechanism (20) is provided on the connecting surface (12) of the support platform (10) for supporting the support platform (10), and the leg mechanism (20) is configured to switch between a first position of raising the support platform (10) and a second position of lowering the support platform (10); the leg mechanism (20) is also configured to switch between an unfolded position and a folded position. A folding mechanism (30), connected between the leg mechanism (20) and the support platform (10), is configured to switch between an extended support position and a retracted folding position, wherein when the folding mechanism (30) is in the support position, the leg mechanism (20) is in the extended position; and when the folding mechanism (30) is in the folded position, the leg mechanism (20) is in the retracted position.

2. The underground coal mine work platform according to claim 1, characterized in that, The leg mechanism (20) includes: The outer shell (21) has a receiving cavity and is hinged to the connecting surface (12); The inner rod (22) is telescopically connected within the receiving cavity and contacts the ground; A connector (23) is disposed between the inner rod (22) and the outer shell (21) and configured to adjust the position of the inner rod (22) within the outer shell (21).

3. The underground coal mine work platform according to claim 1, characterized in that, The connector (23) includes: A sliding groove (231) is provided along the extending direction of the outer shell (21), and the sliding groove (231) has a plurality of stop grooves (2311) arranged along the extending direction and connected to the sliding groove (231). Hook lock plate (232) is connected to the inner rod body (22), and hook lock plate (232) has a locking pin (2323) which is configured to be compatible with any one of the multiple stop slots (2311); A first elastic element (233) is connected between the hook lock plate (232) and the inner rod body (22) and is configured such that the hook lock plate (232) has an elastic force that allows it to move from the sliding groove (231) toward the stop groove (2311).

4. The underground coal mine work platform according to claim 3, characterized in that, The hook-lock plate (232) includes: The main body (2321) and the arcuate part (2322) connected to the main body (2321) are provided with the locking pin (2321) and the arcuate part (2322) is provided with a recessed groove (2324). The inner rod body (22) has an installation groove (221) formed thereon. The installation groove includes a snap-fit ​​groove (2211) and a movable groove (2212) connected thereto. A protrusion (2213) is formed between the snap-fit ​​groove (2211) and the movable groove (2212). The arc-shaped portion (2322) is adapted to the snap-fit ​​groove (2211), the main body portion (2321) is adapted to the movable groove (2212), and the first elastic member (233) is connected between the main body portion (2321) and the movable groove (2212), so that when the recessed groove (2324) is engaged with the protrusion (2213), the main body portion (2321) can move towards the movable groove (2212) on the side of the setting position groove (2311) under the action of elastic force.

5. The underground coal mine work platform according to claim 4, characterized in that, The connector (23) further includes a sliding limiting plate (234), which is slidably disposed on the inner rod (22), and the sliding limiting plate (234) is provided with a limiting groove (2341) that is adapted to the locking pin (2323). The sliding limiting plate (234) can switch between limiting the locking pin (2323) at a limiting position (2342) and releasing the locking pin (2323) at a releasing position (2343).

6. The underground coal mine work platform according to claim 5, characterized in that, The limiting groove (2341) includes: a main groove (23411) and a limiting body (23412) disposed in the main groove (23411); when the sliding limiting plate (234) moves to the limiting position (2342), the locking pin (2323) abuts against the limiting body (23412) to limit the position of the locking pin (2323) so that it will not move into the gear groove (2311) when it moves in the sliding groove (231); when the sliding limiting plate (234) moves to the release position (2343), the locking pin (2323) does not abut against the limiting body (23412) so that it moves directly into the gear groove (2311) when it moves in the sliding groove (231).

7. The underground coal mine work platform according to claim 1, characterized in that, The folding mechanism (30) includes: The linkage assembly (31) includes at least two sequentially hinged links (311), wherein one end of at least one link (311) is hinged to the connecting surface (12), and one end of at least another link (311) is hinged to the leg mechanism (20), and the at least two sequentially hinged links (311) are capable of switching between a support position with an angle of 180 degrees between them and a folded position with an angle of less than 180 degrees between them.

8. The underground coal mine work platform according to claim 7, characterized in that, The folding mechanism (30) further includes: The second elastic element (321), one end of which is connected to at least one of the links (311) and the other end of which is connected to at least another link (311), is configured such that at least two links (311) have a tendency force to rotate relative to each other about the hinge point (312) from the supported position to the folded position. When the included angle between at least two hinged links (311) is 180 degrees, the two hinged links (311) are in a dead position, and the second elastic element (321) cannot make the at least two links (311) rotate around the hinge point (312); when the included angle between at least two hinged links (311) is less than 180 degrees, the second elastic element (321) makes the at least two links (311) rotate around the hinge point (312).

9. The underground coal mine work platform according to claim 1, characterized in that, It also includes a locking assembly (40), which includes a latch (41) and a locking ring (42), respectively disposed on both sides of the support platform (10). When the working platform includes multiple platforms, in two adjacent support platforms (10), the latch (41) on one support platform (10) is connected to the locking ring (42) on the other support platform (10).

10. A method for operating a coal mine underground work platform as described in claim 6, characterized in that, Includes the following steps: S10: Find a suitable location at the construction site in the coal mine and drive the folding mechanism (30) to switch the leg mechanism (20) from the folded position to the unfolded position; S20: Adjust the leg mechanism (20) so that it can switch from the second position of lowering the height of the support platform (10) to the first position of raising the height of the support platform (10) to adjust to a suitable height; wherein, the sliding limit plate (234) moves to the limiting position (2342) so that when the locking pin (2323) moves in the sliding groove (231), it moves to the position of the gear slot (2311) because the limiting of the sliding limit plate (234) prevents the locking pin (2323) from moving into the gear slot (2311); when the inner rod (22) moves to the first position, the sliding limit plate (234) is adjusted to the release position (2343). At this time, the sliding limit plate (234) will not limit the position of the locking pin (2323), so that when the locking pin (2323) moves in the sliding groove (231), it moves directly into the gear slot (2311) when it moves to the position of the gear slot (2311); S30: After construction is completed, the leg mechanism (20) is switched from the first position of raising the height of the support platform (10) to the second position of lowering the height of the support platform (10), and the folding mechanism (30) is driven to switch the leg mechanism (20) from the unfolded position to the folded position; wherein, the sliding limit plate (234) is moved to the limit position (2342), so that when the locking pin (2323) moves in the sliding groove (231), it moves to the stop groove (2311). The locking pin (2323) will not move into the gear slot (2311) due to the limitation of the sliding limit plate (234); when the inner rod (22) moves to the second position, the sliding limit plate (234) is adjusted to the release position (2343). At this time, the sliding limit plate (234) will not limit the position of the locking pin (2323), so that when the locking pin (2323) moves in the sliding groove (231), it will move directly into the gear slot (2311) when it moves to the position of the gear slot (2311).

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