Suspension type steering device for coal mine tunneling

Abstract

A suspension type steering device for coal mine tunneling comprises a reversed loader head and a reversed loader tail, and is characterized in that a suspension steering mechanism for suspending the reversed loader head and the reversed loader tail is fixedly arranged at the rear part of an excavator; the suspension steering mechanism comprises a pulley support frame, a pulley, a hydraulic cylinder support frame, a hydraulic cylinder and a steel wire rope; the pulley support frame is fixedly arranged at the upper part of the heading machine scraper-trough conveyer; the hydraulic cylinder supporting frame is fixedly arranged on the right side of the pulley supporting frame. The fixed end of the hydraulic cylinder is hinged to the hydraulic cylinder supporting frame through a duckbilled fixing piece, and the telescopic end of the hydraulic cylinder is hinged to the transshipping machine head through a duckbilled fixing piece. The pulley is rotationally fixed on the pulley support frame through a pin shaft; connecting rings are arranged at the two ends of the steel wire rope; duckbilled fixing pieces are fixedly arranged on the left and right sides of the tail of the reversed loader; the steel wire rope is hinged to the duckbilled fixing piece through a connecting ring after bypassing the pulley. The bridge type reversed loader solves the problems that an existing bridge type reversed loader is poor in turning flexibility and high in potential safety hazard under the roadway turning working condition.

Description

Technical Field

[0001] This utility model relates to the technical field of transportation equipment for coal mine tunneling faces, specifically to a suspended steering and transfer device for efficient transfer of coal and gangue in turning conditions at coal mine tunneling faces. Background Technology

[0002] In coal mine tunneling operations, the coal and gangue produced by the tunneling machine need to be transported to the subsequent transportation system via transfer equipment. Currently, commonly used bridge-type transfer machines (such as the SJ-800 / 11 model) are connected to the tail of the tunneling machine via vertical and horizontal shafts and rely on pulleys for support on the belt conveyor tail or scraper conveyor track. However, this type of bridge-type transfer machine has the following significant defects in its structural design:

[0003] Poor turning flexibility: The overall length of a bridge-type transfer crane is usually around 14 meters (e.g., Figure 3 As shown in the figure, its long dimensions make it difficult to adjust the direction flexibly in conditions such as tunnel turns and bends. The pulley support structure is prone to problems such as slide jamming and pulley derailment when turning, which seriously affects the transfer efficiency.

[0004] Safety Hazards: When the turning radius of the tunnel is too small or the turning angle is too large, the bridge-type transfer machine cannot operate normally, forcing the tunneling machine to unload the coal and gangue directly onto the floor. In this case, it is necessary to rely on a side-dumping bucket truck or manual labor to clean the coal and gangue to the transport equipment, which is not only labor-intensive and inefficient, but also requires personnel to work in a high-risk area behind, posing safety hazards.

[0005] In summary, there is an urgent need for a flexible and safe transfer device to meet the needs of complex turning conditions in coal mine roadways, improve tunneling efficiency, and reduce operational risks. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides a suspended steering device for coal mine tunneling. Through the design of the suspended structure and hydraulic drive system, it solves the problems of poor flexibility and low safety of existing bridge-type transfer machines in roadway turning conditions.

[0007] This utility model is achieved through the following technical solution: a suspended steering device for coal mine tunneling, comprising a transfer machine head and a transfer machine tail connected to the rear of an excavator. The key technical points are: a suspended steering mechanism for suspending the transfer machine head and tail is fixedly installed on the tunneling machine chute at the rear of the excavator; the suspended steering mechanism includes a pulley support frame, a pulley, a hydraulic cylinder support frame, a hydraulic cylinder, and a wire rope; the pulley support frame is fixedly installed on the upper part of the tunneling machine chute; the hydraulic cylinder support frame is fixedly installed on the right side of the pulley support frame; the fixed end of the hydraulic cylinder is hinged to the hydraulic cylinder support frame via a duckbill fixing member, and the telescopic end of the hydraulic cylinder is hinged to the transfer machine head via the duckbill fixing member; the pulley is rotatably fixed to the pulley support frame via a pin; connecting rings are provided at both ends of the wire rope, and duckbill fixing members are fixedly installed on the left and right sides of the bottom of the transfer machine tail; the wire rope passes over the pulley and is hinged to the duckbill fixing members on both sides of the bottom of the transfer machine tail via the connecting rings.

[0008] Furthermore, a connecting plate is fixedly installed on the pulley support frame; the pulley is rotatably disposed between the connecting plate and the pulley support frame.

[0009] The beneficial effects and features of this utility model are as follows:

[0010] To facilitate shipment and improve efficiency in tunneling around bends, we made bold optimizations to the structure of the transfer machine. Specifically, we removed the intermediate section of the transfer machine, retaining only the head and tail sections, reducing its length from 14 meters to 6 meters. This change not only reduced the overall weight of the transfer machine but also laid a solid foundation for its flexible application in tunneling around bends.

[0011] Secondly, we abandoned the traditional pulley support method and instead adopted a wire rope suspension system. By suspending the transfer machine at the rear of the tunneling machine and relying on the weight of the tunneling machine itself to keep the transfer machine suspended, we effectively avoided friction between the transfer machine and the track or tunnel wall, thereby improving tunneling efficiency. At the same time, this suspension method also simplifies the installation process and reduces maintenance costs.

[0012] Finally, to enable the transfer machine to swing left and right during cornering during tunneling, we installed a hydraulic telescopic cylinder on the side of the tunneling machine. This cylinder has a powerful telescopic capacity, allowing precise control of the transfer machine's swing angle and amplitude. Through the cylinder's extension and retraction, the transfer machine can closely follow the tunneling machine's trajectory, ensuring that coal and gangue fall accurately and efficiently into the lower conveyor. This design allows for normal operation during tunnel turns without interrupting the transfer process, while also avoiding the safety hazards of personnel clearing cargo from behind. Remote steering control via a control panel further enhances operational safety. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the suspension steering mechanism in this utility model;

[0014] Figure 2 This is a schematic diagram of the usage state of this utility model;

[0015] Figure 3 This is a schematic diagram of the structure of an existing bridge transfer machine.

[0016] The main components in the diagram are numbered as follows: 1. Pulley support frame; 101. Connecting plate; 2. Pulley; 3. Wire rope; 301. Connecting ring; 4. Hydraulic cylinder support frame; 5. Hydraulic cylinder; 6. Duckbill fastener; 7. Excavator; 701. Tunneling machine chute; 8. Tunneling machine chute; 9. Transfer machine head; 10. Transfer machine intermediate section; 11. Transfer machine tail; 12. Transfer trolley; 13. Belt conveyor.

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and the other drawings obtained are all within the protection scope claimed by this utility model. Detailed Implementation

[0018] The following combination Figure 1-3 The contents of this utility model will be described in detail through specific embodiments. Example

[0019] This suspended steering device for coal mine tunneling includes a transfer machine head 9 and a transfer machine tail 11 connected to the rear of an excavator 7. A suspension steering mechanism for suspending the transfer machine head and tail is fixedly installed on the tunneling machine chute 701 at the rear of the excavator. The suspension steering mechanism includes a pulley support frame 1, a pulley 2, a hydraulic cylinder support frame 4, a hydraulic cylinder 5, and a wire rope 3. The pulley support frame is fixedly installed on the upper part of the tunneling machine chute. The hydraulic cylinder support frame is bolted to the right side of the pulley support frame, and is also bolted to the upper part of the tunneling machine chute. The fixed end of the hydraulic cylinder is hinged to the hydraulic cylinder support frame via a duckbill fastener 6, which includes a U-shaped component. The system includes a fixed shaft fixed to the U-shaped component, specifically, the U-shaped component is fixedly connected to the hydraulic cylinder support frame, and a hinge is fixedly installed at the fixed end of the hydraulic cylinder. This hinge has a hinge hole that mates with the fixed shaft. The telescopic end of the hydraulic cylinder is hinged to the transfer machine head via a duckbill fixing component. The duckbill fixing component includes a U-shaped component and a fixed shaft fixed to the U-shaped component. Specifically, the U-shaped component is fixedly connected to the transfer machine head, and a hinge is fixedly installed at the telescopic end of the hydraulic cylinder. This hinge has a hinge hole that mates with the fixed shaft. The pulley is rotatably fixed to the pulley support frame via a pin. The pulley is a 10t pulley used to cooperate with the fixed limit of the wire rope. The central axis of the pulley must be coaxial with the tail axis of the transfer machine (e.g., ...). Figure 2 The wire rope is provided with connecting rings 301 at both ends, and duckbill fixing parts are fixedly installed on the left and right sides of the bottom of the transfer machine tail. After the wire rope passes over the pulley, it is hinged to the duckbill fixing parts on both sides of the bottom of the transfer machine tail through the connecting rings. The duckbill fixing parts include U-shaped parts and fixed shafts fixed on the U-shaped parts. Specifically, the U-shaped parts are fixedly connected to the bottom of the transfer machine tail, and the connecting rings are sleeved on the fixed shafts.

[0020] To increase the connection stability between the pulley and the pulley support frame, a connecting plate is fixedly installed on the pulley support frame; the pulley is rotatably positioned between the connecting plate and the pulley support frame.

[0021] When using a traditional bridge-type transfer machine for tunneling around a bend, the machine must be dismantled after approximately 5 meters due to the limitations of the bend section. At this point, the tunneling machine directly unloads the cut coal and gangue onto the floor, requiring the assistance of a side-dump loader for cleanup. This not only results in slow output but also necessitates at least three people working together. Tunneling a 25-meter bend section in this manner typically takes about five days.

[0022] However, this utility model's suspended transfer machine replaces the traditional loader-based delivery method. This innovative measure significantly improves tunneling efficiency. The suspended transfer machine can directly transport coal and gangue to the lower conveyor, achieving continuous and efficient operation of the delivery system. Therefore, the 25m turning tunneling task was completed in just 2.3 days, greatly saving labor and time costs compared to traditional methods.

Claims

1. A suspended steering device for coal mine tunneling, comprising a transfer machine head and a transfer machine tail connected to the rear of an excavator, characterized in that: A suspension and steering mechanism for suspending the transfer machine head and tail is fixedly installed on the tunneling machine chute at the rear of the excavator. The suspension and steering mechanism includes a pulley support frame, pulleys, a hydraulic cylinder support frame, a hydraulic cylinder, and a wire rope. The pulley support frame is fixedly installed on the upper part of the tunneling machine chute. The hydraulic cylinder support frame is fixedly installed on the right side of the pulley support frame. The fixed end of the hydraulic cylinder is hinged to the hydraulic cylinder support frame through a duckbill fixing member, and the telescopic end of the hydraulic cylinder is hinged to the transfer machine head through a duckbill fixing member. The pulley is rotatably fixed to the pulley support frame by a pin. The two ends of the wire rope are provided with connecting rings, and duckbill fixing members are fixedly installed on the left and right sides of the bottom of the transfer machine tail. After passing over the pulley, the wire rope is hinged to the duckbill fixing members on both sides of the bottom of the transfer machine tail through the connecting rings.

2. The suspended steering device for coal mine tunneling according to claim 1, characterized in that: A connecting plate is fixedly installed on the pulley support frame; the pulley is rotatably disposed between the connecting plate and the pulley support frame.

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