Longitudinal beam replacement device and method for coal mine belt conveyor

Abstract

The invention provides a longitudinal beam replacement device and method for a coal mine belt conveyor, and belongs to the technical field of mining machinery maintenance. The device comprises a moving platform, a walking mechanism, a carrier roller frame jacking mechanism and a first driving mechanism. The walking mechanism is arranged at the top of the moving platform and is embedded into a notch of the longitudinal beam to roll; the carrier roller frame jacking mechanism is installed on the moving platform and comprises a second driving mechanism, a transmission connecting rod assembly and a top bearing beam, the second driving mechanism drives the transmission connecting rod assembly to enable the top bearing beam to vertically ascend and descend, and therefore the upper groove carrier roller frame is jacked up or put down; the first driving mechanism drives the moving platform to move along the longitudinal beam. The device has the beneficial effects that the belt conveyor longitudinal beam is used as a walking track, rapid migration of the device is achieved through driving of the first driving mechanism, simultaneous jacking of multiple sets of carrier roller frames is achieved through the transmission connecting rod assembly, an operation space is provided for replacement of the belt conveyor longitudinal beam, the manual carrying strength is remarkably reduced, and the working efficiency is improved. And the longitudinal beam replacement efficiency and the operation safety are improved.

Description

A longitudinal beam replacement device and method for coal mine belt conveyors Technical Field

[0001] This invention relates to the field of mining machinery maintenance technology, and in particular to a longitudinal beam replacement device and method for coal mine belt conveyors. Background Technology

[0002] As the core equipment for underground coal transportation, the structural integrity of the high-strength belt conveyor in the main shaft of a coal mine is directly related to the safe production of the mine. As shown in Figure 1, the main structure of the high-strength belt conveyor in the main shaft of a coal mine mainly consists of a pair of parallel longitudinal beams 1, support legs 2 supported below the longitudinal beams 1, and upper trough idler rollers 3 installed on the upper surface of the longitudinal beams 1; the belt conveying direction is consistent with the length direction of the longitudinal beams 1, and the longitudinal beams 1 are divided into unit segments with a standard length of about 6m along the length direction.

[0003] After 6-10 years of continuous operation in the high-humidity, weakly acidic environment underground, the longitudinal beams 1 of the high-strength belt conveyor generally showed severe corrosion, with an average measured corrosion depth of over 3.0 mm. This resulted in a reduction of more than 50% in the structural load-bearing capacity, which greatly threatened the safe operation of the equipment. To ensure safe production, it is necessary to replace the sections of longitudinal beam 1 with excessive corrosion in a timely manner.

[0004] Currently, the industry generally adopts the segmented lifting method for replacing longitudinal beam 1. The standard operating procedure is as follows: First, manually loosen the connecting bolts between the upper trough roller frame 3 and the target longitudinal beam 1; then move 2-4 transfer devices to the working position; then place angle iron on the top of the transfer device as a force transmission medium; then operate the transfer device on one side to lift the angle iron, so that a separation gap is formed between the upper trough roller frame 3 and the rusted longitudinal beam 1; complete the disassembly and replacement of the rusted longitudinal beam section in this gap; finally, repeat the above process to treat the other side of the longitudinal beam 1.

[0005] This traditional method has significant technical drawbacks: on the one hand, in the narrow and damp working environment of the tunnel, 2-3 workers need to repeatedly move the heavy conveyor, which not only results in high labor intensity and low positioning accuracy, but also causes the time spent on moving and adjusting to account for more than half of the entire replacement process; on the other hand, the damp track surface can easily cause the conveyor to tip over, seriously threatening the safety of the workers.

[0006] Therefore, there is an urgent need to provide a longitudinal beam replacement device and method that can significantly save manpower, improve replacement efficiency, and ensure operational safety. Summary of the Invention

[0007] (a) Technical problems to be solved

[0008] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a longitudinal beam replacement device and method for a coal mine belt conveyor, which solves the technical problem that manual handling of the conveyor for longitudinal beam replacement is not only labor-intensive and inefficient, but also poses safety hazards.

[0009] (II) Technical Solution

[0010] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0011] In a first aspect, embodiments of the present invention provide a longitudinal beam replacement device for a coal mine belt conveyor, used for segmented replacement of the longitudinal beams of the belt conveyor. The belt conveyor further includes an upper trough idler frame detachably mounted on the longitudinal beams. The longitudinal beam replacement device includes:

[0012] Mobile platform;

[0013] A walking mechanism is provided on the left and right sides of the front and rear ends of the mobile platform. The walking mechanism is configured to be able to be embedded in the slot of the longitudinal beam and roll along the length of the longitudinal beam.

[0014] A roller frame lifting mechanism, mounted on the movable platform, is used to lift or lower the upper trough roller frame; and

[0015] The first drive mechanism is connected to the traveling mechanism and is used to drive the mobile platform, the traveling mechanism and the roller frame lifting mechanism to move along the longitudinal beam.

[0016] Optionally, the roller frame lifting mechanism includes a second drive mechanism, a transmission linkage assembly, and a top load-bearing beam;

[0017] The second drive mechanism and the transmission linkage assembly are disposed on the moving platform. The top support beam is disposed on the top of the transmission linkage assembly. The second drive mechanism drives the top support beam to move up and down in the vertical direction through the transmission linkage assembly.

[0018] Optionally, the second driving mechanism is a telescopic driving member, which is horizontally disposed on the mobile platform;

[0019] The telescopic drive component has its telescopic end hinged to the lower end of the transmission linkage assembly, and the vertical lifting and lowering of the top load-bearing beam is achieved by horizontally pushing the transmission linkage assembly.

[0020] Optionally, the top supporting beam is a channel steel structure, the length of which extends parallel to the moving direction of the moving platform, and the length of the top supporting beam is adapted to the length of the longitudinal beam unit segment.

[0021] Optionally, it also includes a reinforcing rod, which is laterally connected between the top load-bearing beams on the left and right sides to increase lateral stability during the lifting process.

[0022] Optionally, the walking mechanism includes a first pulley group respectively disposed on the left and right sides of the front end of the mobile platform and a second pulley group respectively disposed on the left and right sides of the rear end of the mobile platform;

[0023] The distance between the first pulley block and the second pulley block is greater than the length of the longitudinal beam unit segment.

[0024] Optionally, both the first pulley group and the second pulley group include a plurality of rollers arranged in a straight line;

[0025] The multiple rollers are fixedly connected to the mobile platform via connecting frames, and the rolling surfaces of the rollers are configured to mate with the inner bottom surface of the longitudinal beam of the C-shaped channel steel structure.

[0026] Optionally, the first drive mechanism includes a winch and a traction wire rope;

[0027] The mobile platform is provided with a hook or lifting lug at its end, the winch body is located at the end of the belt conveyor, one end of the traction wire rope is connected to the winch, and the other end of the traction wire rope is connected to the hook or the lifting lug.

[0028] Optionally, the first drive mechanism includes a drive motor, a drive gear, and a rack;

[0029] The drive motor is mounted on the mobile platform, the rack is mounted on the coal mine belt conveyor along its length, and the drive gear is sleeved at the end of the main shaft of the drive motor, the drive gear meshing with the rack.

[0030] Secondly, embodiments of the present invention provide a longitudinal beam replacement method based on the above-described longitudinal beam replacement device, characterized by comprising the following steps:

[0031] S1. Device positioning and traction movement: The longitudinal beam replacement device is installed on the coal mine belt conveyor. The first drive mechanism drives the moving platform, so that the walking mechanism is embedded in the slot of the longitudinal beam and rolls along the longitudinal beam until the longitudinal beam replacement device moves to the position of the target longitudinal beam segment to be replaced.

[0032] S2, Lifting the upper trough roller frame: Drive the roller frame lifting mechanism to rise and lift the upper trough roller frame above the target longitudinal beam section, so that the upper trough roller frame is separated from the longitudinal beam, thereby forming a replacement operation space between the upper trough roller frame and the longitudinal beam;

[0033] S3. Replace the longitudinal beam: Within the replacement operation space, remove the corroded old longitudinal beam section and install the new longitudinal beam section in place;

[0034] S4. Reset and relocation: Drive the roller frame lifting mechanism to lower it so as to place the upper trough roller frame on the new longitudinal beam section, and complete the replacement of the longitudinal beam section; then use the first drive mechanism to drive the moving platform to move along the longitudinal beam to the next position to be replaced.

[0035] (III) Beneficial Effects

[0036] The beneficial effects of the longitudinal beam replacement device of the present invention are mainly reflected in the following aspects:

[0037] First, it enables mechanized migration, significantly reducing labor intensity. This invention, through the cooperation of the walking mechanism and the first drive mechanism (traction mechanism), enables the device to move automatically along the longitudinal beam track of the belt conveyor itself. This completely changes the traditional replacement operation that required manual repetitive handling of heavy conveyor belts, greatly reducing the physical burden on operators.

[0038] Secondly, it significantly improves replacement efficiency. The device utilizes existing longitudinal beam slots as its travel track, enabling rapid and precise positioning. Combined with the integrated idler frame lifting mechanism, it can quickly complete a series of actions including reaching the desired position, precise alignment, and overall lifting, shortening the preparation time for longitudinal beam replacement and multiplying the overall efficiency of a single replacement operation.

[0039] Third, it significantly enhances operational safety. On the one hand, the traveling mechanism is embedded inside the slot of the longitudinal beam, and is constrained by the longitudinal beam during movement, resulting in high stability and effectively avoiding the risk of tipping over and collapsing that is very likely to occur with traditional conveyors on wet, slippery, or uneven ground. On the other hand, through mechanized traction and lifting, this invention allows operators to perform remote or semi-remote operations away from the core lifting area, significantly reducing the probability of safety accidents such as collisions and injuries caused by manual handling of heavy objects and close-range operations.

[0040] Fourth, the structure is highly integrated and space is utilized efficiently. This invention integrates walking, driving, and lifting functions onto a mobile platform, resulting in a compact structure. Because the walking mechanism cleverly utilizes the internal space of the conveyor belt's longitudinal beam, no additional tracks are required, saving costs and adapting to the confined working environment of underground mines. Attached Figure Description

[0041] Figure 1 is a schematic diagram of the internal structure of a high-strength belt conveyor in a coal mine main shaft in the prior art;

[0042] Figure 2 is a front view schematic diagram of Embodiment 1 of the longitudinal beam replacement device of the present invention installed on a high-strength belt conveyor in the main shaft of a coal mine.

[0043] Figure 3 is a front view of the main shaft high-power belt conveyor in Figure 2 with some of its support legs removed; in this figure, the lifting mechanism of the longitudinal beam replacement device is in the lowering position.

[0044] Figure 4 is another main view of the coal mine main shaft high-power belt conveyor in Figure 2 with some of the support legs removed; in this view, the lifting mechanism of the longitudinal beam replacement device is located in the lifting position.

[0045] Figure 5 is a side view of the high-powered belt conveyor in the main shaft of the coal mine shown in Figure 2.

[0046] Figure 6 is a front view schematic diagram of the moving platform and lifting mechanism of Embodiment 2 of the longitudinal beam replacement device of the present invention;

[0047] Figure 7 is a side view of the longitudinal beam replacement device of the present invention installed on a high-strength belt conveyor in the main shaft of a coal mine, according to Embodiment 2.

[0048] [Explanation of Labels in the Attached Image]

[0049] 1: Longitudinal beam; 2: Support leg; 3: Upper trough roller frame; 4: Moving platform; 5: Traveling mechanism; 51: First pulley block; 52: Second pulley block; 53: Connecting frame; 6: Roller frame lifting mechanism; 61: Telescopic drive component; 62: Scissor lift linkage; 63: Top load-bearing beam; 64: Reinforcing rod; 7: Bottom trough belt. Detailed Implementation

[0050] To better explain and facilitate understanding of the present invention, a detailed description of the invention is provided below with reference to the accompanying drawings and specific embodiments. In this document, directional terms such as "up," "down," "left," "right," "front," and "back" are used with reference to the orientation shown in Figure 4.

[0051] Example 1:

[0052] Referring to Figures 2 to 5, this embodiment provides a longitudinal beam replacement device for a coal mine belt conveyor, which is mainly used to replace the longitudinal beam 1 of a high-strength belt conveyor in sections.

[0053] As shown in Figure 5, the high-strength belt conveyor in the main shaft of a coal mine includes: a pair of longitudinal beams 1 arranged parallel to each other along the conveying direction, the longitudinal beams 1 being made of C-shaped channel steel; the longitudinal beams 1 being supported on the roadway floor by legs 2; several upper trough idler roller frames 3 being detachably installed on the upper surface of the longitudinal beams 1; and a bottom trough belt 7 being provided below the two longitudinal beams 1. The longitudinal beams 1 are usually divided into unit segments with a standard length of approximately 6m along their length.

[0054] As shown in Figures 2 to 5, the longitudinal beam replacement device of this embodiment is arranged between the left and right longitudinal beams 1, including:

[0055] Mobile Platform 4;

[0056] The traveling mechanism 5 is located on top of the mobile platform 4 and is embedded inside the slot of the longitudinal beam 1;

[0057] The roller frame lifting mechanism 6 is installed on the mobile platform 4;

[0058] The first drive mechanism is used to traction the mobile platform 4 to move along the longitudinal beam 1.

[0059] Specifically, the mobile platform 4 is a rectangular frame structure, which can be welded together from two longitudinal main beams extending along the conveyor belt direction and multiple transverse connecting beams to form a rigid frame. Of course, in other embodiments, longitudinally extending beams can also be set between the two longitudinal main beams to connect adjacent transverse connecting beams as needed. In this embodiment, the mobile platform 4 is located between the two longitudinal beams 1 and arranged above the bottom trough belt 7, so that the bottom trough belt 7 can pass under the mobile platform 4, as shown in Figure 5, without spatial interference.

[0060] The front and rear ends of the mobile platform 4 are each welded with connecting frames 53 for mounting the traveling mechanism 5. A support for mounting the roller frame lifting mechanism 6 is fixedly installed on the upper surface of the mobile platform 4. A hook or lifting lug detachably connected to the traction wire rope is provided at one end of the mobile platform 4 for cooperation with the first drive mechanism. It should be noted that vertical connecting frames 53 are welded to the outer surfaces of the front and rear ends of the longitudinal main beam of the mobile platform 4; a support for mounting the roller frame lifting mechanism 6 can be installed on the upper surface of the transverse connecting beam of the mobile platform 4.

[0061] As shown in Figures 4 and 5, the walking mechanism 5 is located on the top of the moving platform 4 and is configured to roll inside the slot of the longitudinal beam 1 to enable the device to move along the length of the longitudinal beam 1.

[0062] In this embodiment, the traveling mechanism 5 includes a first pulley group 51 respectively disposed on the left and right sides of the front end of the mobile platform 4, and a second pulley group 52 respectively disposed on the left and right sides of the rear end of the mobile platform 4. The first pulley group 51 and the second pulley group 52 are arranged along the conveying direction, and their center distance is greater than 6m, which is greater than the standard length of the longitudinal beam 1 unit segment. This allows the mobile platform 4 to span the entire longitudinal beam segment to be replaced during the lifting operation, ensuring the safety and stability of the force during the replacement process.

[0063] Preferably, both the first pulley group 51 and the second pulley group 52 include multiple rollers arranged in a straight line. Each roller is fixedly connected to the mobile platform 4 via a connecting frame 53 and is rotatable. The inner end of the connecting frame 53 is fixed to the longitudinal main beam of the mobile platform 4, and the outer end extends to the height of the slot of the longitudinal beam 1. The upper end of the connecting frame 53 is equipped with the rollers of the pulley group via a rotating shaft, so that the rolling surface of the rollers mates with the inner bottom surface of the longitudinal beam 1. The longitudinal beam 1 is a C-shaped channel steel, and the rollers roll on the inner bottom surface of the C-shaped channel steel to support and guide the mobile platform 4. In this embodiment, a pulley group is provided on the left and right sides of the front and rear ends of the mobile platform 4. The pulley groups are rolled in the slot of the longitudinal beam 1, which allows the mobile platform 4 to move smoothly along the longitudinal beam 1 under traction, while being constrained by the side wall of the longitudinal beam 1, effectively preventing lateral swaying and tipping.

[0064] As shown in Figures 3 to 5, the roller frame lifting mechanism 6 is installed on the mobile platform 4 and is used to lift or lower the upper trough roller frame 3 during replacement operations.

[0065] The roller frame lifting mechanism 6 includes a second drive mechanism, a transmission linkage assembly, and a top support beam 63. Both the second drive mechanism and the transmission linkage assembly are arranged on the moving platform 4. The top support beam 63 is fixedly connected to the top of the transmission linkage assembly, and the second drive mechanism drives the top support beam 63 to rise and fall vertically via the transmission linkage assembly.

[0066] In this embodiment, the second drive mechanism adopts a telescopic drive component 61, preferably a linear drive mechanism such as a hydraulic jack, hydraulic cylinder, or electric push rod, which is horizontally set on the moving platform 4. The telescopic drive component 61 is fixed to the moving platform 4 by a support, and its piston rod is arranged along or parallel to the conveyor belt direction.

[0067] To achieve synchronous lifting over a long span, as shown in Figures 4 and 5, this embodiment preferably uses a set of scissor lift links 62. Each set includes two scissor lift links 62, which are respectively arranged on the left and right sides of the moving platform 4. Each scissor lift link 62 corresponds to one telescopic drive member 61, resulting in two telescopic drive members 61, symmetrically distributed on the left and right sides of the moving platform 4, as shown in Figure 6. The two telescopic drive members 61 drive the top load-bearing beam 63 above them in a one-to-one correspondence, resulting in a simpler structure suitable for lifting loads of smaller magnitude.

[0068] Furthermore, each scissor lift link 62 consists of a pair of cross-arranged links, whose intersections are connected by pins to form a scissor lift structure. The first lower end of the scissor lift link 62 is connected to the moving platform 4 via a hinge point, and the second lower end of the scissor lift link 62 is hinged to the telescopic end of the telescopic drive member 61; the first upper end of the scissor lift link 62 is connected to the top support beam 63 via a hinge point, and the second upper end of the scissor lift link 62 is movably connected to the top support beam 63 via a sliding groove. When the piston rod of the telescopic drive member 61 extends, it pushes the second lower end of the scissor lift link 62 towards the first lower end, reducing the included angle of the scissor lift link 62, thereby causing the top support beam 63 to rise; conversely, when the piston rod retracts, the scissor lift link 62 opens, and the top support beam 63 descends accordingly.

[0069] Because the left and right scissor links 62 and their corresponding telescopic drive components 61 move synchronously, the top support beam 63 remains basically horizontal during the lifting and lowering process, and can simultaneously lift multiple sets of upper trough roller frames 3 with a length of about 5-6m.

[0070] As shown in Figures 3, 4, and 5, the top supporting beam 63 is a channel steel structure, and its length direction is parallel to the moving direction of the moving platform 4. In this embodiment, the length of the top supporting beam 63 is preferably 5-6m, corresponding to the standard length of the longitudinal beam 1 unit segment to be replaced, so that all the upper trough roller frames 3 on the longitudinal beam segment can be simultaneously lifted and covered in one lifting operation. The upper surface of the top supporting beam 63 can be machined with anti-slip blocks or rubber pads to increase the friction with the bottom of the upper trough roller frame 3 and prevent relative slippage during the lifting process.

[0071] Specifically, the first drive mechanism (not shown in the figure) is used to drive the mobile platform 4 and its walking mechanism 5 and roller frame lifting mechanism 6 to move along the longitudinal beam 1.

[0072] In this embodiment, as shown in Figures 2 and 5, the first drive mechanism includes a winch located at one end of the belt conveyor and a traction wire rope connected to the winch. Several hooks or lifting lugs are welded to one end of the moving platform 4. One end of the traction wire rope is connected to the winch drum, and the other end is connected to the hooks or lifting lugs on the moving platform 4. During operation changes, the winch is operated to wind up and unwind the wire rope, thereby traction of the moving platform 4, allowing the device to move quickly along the longitudinal beam 1 to the target position.

[0073] In other embodiments, the first drive mechanism may also be an electric hoist, a hydraulic winch, or other traction device suitable for downhole environments, which can be adjusted by those skilled in the art according to the site conditions.

[0074] The working process of the longitudinal beam replacement device in this embodiment is as follows:

[0075] (1) Device positioning and traction movement

[0076] A mobile platform 4, a traveling mechanism 5, and a roller frame lifting mechanism 6 are installed inside the belt conveyor. A winch is installed at the end of the belt conveyor, and one end of the traction wire rope is connected to the hook of the mobile platform 4. When the winch is started, the traction wire rope moves the mobile platform 4 forward or backward. The rollers of the traveling mechanism 5 roll smoothly within the grooves of the longitudinal beam 1, allowing the device to move quickly and accurately to the target working position along the longitudinal beam 1. Because the traveling mechanism 5 is embedded inside the C-shaped longitudinal beam 1, the device will not shift laterally or tip over during movement.

[0077] (2) Lifting the upper trough roller frame

[0078] Once the device has moved to below the target longitudinal beam section, the winch operation is stopped. At this time, the roller frame lifting mechanism 6 is in the lowered position, as shown in Figure 3. The height of the top bearing beam 63 is lower than the bottom of the upper trough roller frame 3, which facilitates the passage of the moving platform 4.

[0079] The piston rod of the telescopic drive component 61 extends outward, pushing the lower end of the scissor link 62 to move towards each other. The included angle of the scissor link 62 decreases, and the top support beam 63 rises vertically under the drive of the scissor link 62. When the top support beam 63 reaches the bottom of the upper trough roller frame 3 and continues to rise to a certain height (e.g., 50-100mm), as shown in Figure 4, the upper trough roller frame 3 separates from the longitudinal beam 1 below it, forming sufficient replacement space.

[0080] Since the top supporting beam 63 is 5-6m long and the two sets of scissor lifts 62 work synchronously, all or most of the upper trough roller frames 3 on the longitudinal beam section can be lifted at once, achieving multi-point synchronous lifting and greatly shortening the replacement preparation time.

[0081] (3) Replace the longitudinal beam

[0082] With the idler frame lifted and the conveyor belt stopped, the operator removes and replaces the severely corroded longitudinal beam unit section within the space formed between the top load-bearing beam 63 and the longitudinal beam 1. Depending on the on-site process, the old longitudinal beam 1 can be removed by disassembling the connecting bolts, gas cutting, or other methods, and then the new longitudinal beam 1 unit section can be hoisted into place and connected and fixed to the adjacent longitudinal beam section and the support leg 2.

[0083] (4) Reset and migration

[0084] After the longitudinal beam replacement is completed and inspected, the piston rod of the telescopic drive component 61 retracts, causing the included angle of the scissor lift linkage 62 to gradually open. The top support beam 63 slowly descends, smoothly placing the upper trough roller bracket 3 back onto the newly installed upper surface of the longitudinal beam 1. Subsequently, the contact between the upper trough roller bracket 3 and the top support beam 63 is released, and the upper trough roller bracket 3 is fixed to the new longitudinal beam 1 unit section with bolts.

[0085] By operating the winch to pull the mobile platform 4 again, the device is moved along the longitudinal beam 1 to the next section of the longitudinal beam that needs to be replaced. By repeating the above lifting and replacement steps, the section replacement operation of the entire conveyor longitudinal beam can be completed.

[0086] As can be seen from the above structure and working process, this embodiment uses the longitudinal beam 1 of the belt conveyor as its own traveling track, and uses a winch to realize the mechanized traction and migration of the device. At the same time, the hydraulically driven scissor linkage structure realizes the synchronous lifting of multiple sets of upper trough roller frames 3, which effectively reduces the labor intensity of manual handling, improves the efficiency of longitudinal beam replacement and operational safety.

[0087] Example 2:

[0088] Referring to Figures 6 and 7, this embodiment provides another longitudinal beam replacement device for a coal mine belt conveyor. This embodiment has a generally similar structure to Embodiment 1, with the main difference being the specific form of the idler frame lifting mechanism 6.

[0089] In this embodiment, the roller frame lifting mechanism 6 also includes a second drive mechanism, a transmission linkage assembly, and a top support beam 63. However, unlike embodiment 1 which only has one set of scissor links 62, this embodiment's transmission linkage assembly includes two sets of scissor links 62, located at the front and rear ends of the moving platform 4, respectively. Each set of scissor links 62 has one telescopic drive member 61 on each side, resulting in four telescopic drive members 61 arranged symmetrically in a front-to-back and left-to-right configuration. The two telescopic drive members 61 on each side jointly drive the top support beam 63 above, achieving the overall lifting of the large-span roller frame.

[0090] As shown in Figure 7, in this embodiment, the top support beams 63 are arranged in a pair, located on both sides of the center line of the conveyor belt. Their length direction is still parallel to the moving direction of the moving platform 4, and the length is preferably 5-6m. To improve the lateral stability during the lifting process, at least one reinforcing rod 64 is laterally connected between the two top support beams 63. Preferably, reinforcing rods 64 are provided at both the front and rear ends of the top support beams 63, so that the two top support beams 63 form an integrated frame structure, which can better resist lateral load and prevent torsion or tilting during the lifting process.

[0091] In use, the operating steps of this embodiment are basically the same as those of Embodiment 1: First, the winch is used to traction the traveling mechanism 5 to move the device to the target position. Then, the telescopic drive component 61 is driven to lift the scissor lift link 62, so that the top bearing beam 63, through the frame formed by the reinforcing rod 64, lifts the upper trough roller frame 3, thereby completing the replacement operation of the longitudinal beam 1. Due to the addition of a set of scissor lift links and two telescopic drive components 61, this embodiment is suitable for working conditions with large lifting loads.

[0092] The structure and operation of the walking mechanism 5, the mobile platform 4, and the first drive mechanism in this embodiment are the same as those in embodiment 1, and will not be repeated here.

[0093] Example 3:

[0094] This embodiment provides another longitudinal beam replacement device for a coal mine belt conveyor. Unlike Embodiment 1, the first drive mechanism in this embodiment is a hub motor. The rotor of this hub motor is directly cast into the pulley rim, while the stator is fixed to the connecting frame 53. This structure eliminates the traditional transmission components, achieving integration of the motor and wheel, resulting in a compact structure and high efficiency.

[0095] The remaining parts that are the same as in Example 1 will not be repeated here.

[0096] Example 4:

[0097] This embodiment provides another longitudinal beam replacement device for a coal mine belt conveyor. The difference from Embodiment 1 is that the first drive mechanism in this embodiment is a gear and rack mechanism, and the transfer function is achieved by replacing the winch with the gear and rack mechanism.

[0098] Specifically, the gear and rack mechanism includes a drive motor, a drive gear, and a rack. The drive motor can be mounted on the moving platform 4, and the rack can be mounted on the coal mine belt conveyor along its length. The drive gear is sleeved at the end of the main shaft of the drive motor, and the drive gear meshes with the rack. Thus, the gear and rack mechanism can drive the moving platform 4, the traveling mechanism 5, and the roller frame lifting mechanism 6 to move along the longitudinal beam 1.

[0099] The remaining parts that are the same as in Example 1 will not be repeated here.

[0100] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0101] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0102] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0103] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0104] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A longitudinal beam replacement device for a coal mine belt conveyor, used for segmented replacement of the longitudinal beams (1) of the belt conveyor, the belt conveyor further comprising an upper trough idler frame (3) detachably mounted on the longitudinal beams (1), characterized in that: The longitudinal beam replacement device includes: a mobile platform (4); a walking mechanism (5) disposed on the left and right sides of the front and rear ends of the mobile platform (4), the walking mechanism (5) being configured to be able to embed into the slot of the longitudinal beam (1) and roll along the length direction of the longitudinal beam (1); a roller frame lifting mechanism (6) mounted on the mobile platform (4) for lifting or lowering the upper groove roller frame (3); and a first drive mechanism, which is connected to the walking mechanism (5) for driving the mobile platform (4), the walking mechanism (5) and the roller frame lifting mechanism (6) to move along the longitudinal beam (1).

2. The longitudinal beam replacement device as described in claim 1, characterized in that: The roller frame lifting mechanism (6) includes a second drive mechanism, a transmission linkage assembly and a top support beam (63); the second drive mechanism and the transmission linkage assembly are mounted on the moving platform (4), and the top support beam (63) is mounted on the top of the transmission linkage assembly. The second drive mechanism drives the top support beam (63) to rise and fall in the vertical direction through the transmission linkage assembly.

3. The longitudinal beam replacement device as described in claim 2, characterized in that: The second driving mechanism is a telescopic driving member (61), which is horizontally arranged on the moving platform (4). The telescopic end of the telescopic driving member (61) is hinged to the lower end of the transmission linkage assembly, and the vertical lifting of the top bearing beam (63) is achieved by horizontally pushing the transmission linkage assembly.

4. The longitudinal beam replacement device as described in claim 2, characterized in that: The top supporting beam (63) is a channel steel structure, and its length extension direction is parallel to the moving direction of the moving platform (4). The length of the top supporting beam (63) is adapted to the length of the longitudinal beam (1) unit segment.

5. The longitudinal beam replacement device as described in claim 4, characterized in that: It also includes a reinforcing bar (64), which is laterally connected between the top supporting beams (63) on the left and right sides to increase lateral stability during the lifting process.

6. The longitudinal beam replacement device as described in claim 1, characterized in that: The walking mechanism (5) includes a first pulley group (51) respectively disposed on the left and right sides of the front end of the mobile platform (4) and a second pulley group (52) respectively disposed on the left and right sides of the rear end of the mobile platform (4); the distance between the first pulley group (51) and the second pulley group (52) is greater than the length of the longitudinal beam (1) unit segment.

7. The longitudinal beam replacement device as described in claim 6, characterized in that: The first pulley group (51) and the second pulley group (52) each include a plurality of rollers arranged in a straight line; the plurality of rollers are respectively fixedly connected to the mobile platform (4) through a connecting frame (53), and the rolling surface of the rollers is configured to cooperate with the inner bottom surface of the longitudinal beam (1) of the C-shaped channel steel structure.

8. The longitudinal beam replacement device as described in claim 1, characterized in that: The first driving mechanism includes a winch and a traction wire rope; the end of the moving platform (4) is provided with a hook or a lifting lug, the body of the winch is located at the end of the belt conveyor, one end of the traction wire rope is connected to the winch, and the other end of the traction wire rope is connected to the hook or the lifting lug.

9. The longitudinal beam replacement device as described in claim 1, characterized in that: The first driving mechanism includes a driving motor, a driving gear and a rack; the driving motor is mounted on the mobile platform (4), the rack is mounted on the coal mine belt conveyor along the length direction, the driving gear is sleeved at the end of the main shaft of the driving motor, and the driving gear meshes with the rack.

10. A method for replacing a longitudinal beam based on the longitudinal beam replacement device according to any one of claims 1-9, characterized in that: The process includes the following steps: S1, device positioning and traction movement: The longitudinal beam replacement device is installed on the coal mine belt conveyor. The first drive mechanism drives the moving platform (4), causing the traveling mechanism (5) to embed into the groove of the longitudinal beam (1) and roll along the longitudinal beam (1) until the longitudinal beam replacement device moves to the position of the target longitudinal beam section to be replaced; S2, lifting the upper trough idler frame: The idler frame lifting mechanism (6) is driven to rise and lift the upper trough idler frame (3) above the target longitudinal beam section, so that the upper trough idler frame (3)... 3) Separate from the longitudinal beam (1) to form a replacement operation space between the upper trough roller frame (3) and the longitudinal beam (1); S3, Replace the longitudinal beam: In the replacement operation space, remove the rusted old longitudinal beam section and install the new longitudinal beam section in place; S4, Reset and move: Drive the roller frame lifting mechanism (6) to descend so as to place the upper trough roller frame (3) on the new longitudinal beam section and complete the replacement of the longitudinal beam section; Then use the first drive mechanism to drive the moving platform (4) to move along the longitudinal beam (1) to the next replacement position.

Images