Two-conveying structure of fully-mechanized coal winning machine

Abstract

The utility model belongs to the field of fully-mechanized excavating machines, particularly relates to a secondary conveying structure of a fully-mechanized excavating machine, and aims to solve the problem that a belt of a third conveying machine head rotates in an idle manner to generate a smoke accident due to the fact that a secondary conveying bottom frame easily presses a third conveying machine tail roller and the roller does not rotate because the secondary conveying height of an existing fully-mechanized excavating machine is not enough. Four U-shaped frames are fixedly arranged on the two sides of the second conveying frame in a rectangular shape, the same connecting piece is arranged in the two U-shaped frames located on the same side, the connecting pieces are used for connecting multiple sections of second conveying frames, the height of the second conveying frame can be increased, and the follow-up connecting angle of the second conveying frame can be changed. Through the arrangement of the connecting piece, the phenomenon that the belt and the tail roller are crushed in the retreating process of the roadheader is reduced, smoke accidents caused by slipping due to belt pressing are effectively prevented, the activity space of the roadheader is increased, the labor efficiency is improved, and conditions are created for safe production.

Description

Technical Field

[0001] This utility model relates to the field of roadheader technology, and in particular to the secondary transport structure of a roadheader. Background Technology

[0002] In underground coal mining, the main function of the roadheader is to drill and transport tunnels. During drilling, the excavated soil is transferred to the third conveyor belt via the second conveyor belt and then transported away.

[0003] Currently, when existing roadheaders are in operation, the positions of each transport device are adjusted. Each time the secondary transport belt moves backward to the tail of the tertiary transport machine, the secondary transport height is insufficient, which can easily cause the secondary transport underframe to press against the tail roller of the tertiary transport machine, causing the roller to stop rotating. This can lead to the tertiary transport head belt spinning idly and generating smoke, and can also damage the belt at the tail of the machine. The backward movement distance is also insufficient. Utility Model Content

[0004] The purpose of this utility model is to solve the shortcomings of the existing technology, which is that due to insufficient height of the second conveyor, the underframe of the second conveyor is prone to pressing on the tail drum of the third conveyor, causing the drum to not rotate, and thus causing the head belt of the third conveyor to spin idly and generate smoke. The proposed second conveyor structure for roadheaders is to address these shortcomings.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The secondary transport structure of a roadheader includes:

[0007] The second transport frame has four U-shaped frames fixedly installed on both sides in a rectangular shape. The same connector is installed in the two U-shaped frames on the same side. The connector is used to connect multiple sections of the second transport frame, which can not only increase the height of the second transport frame, but also change the angle of subsequent connection of the second transport frame.

[0008] In one possible design, the connector is T-shaped, with two far-distance holes symmetrically provided in the wider position of the T-shaped connector, and two near-distance holes symmetrically provided in the narrower position of the T-shaped connector.

[0009] In one possible design, the spacing between the two far-field holes is 15 mm larger than the spacing between the two near-field holes.

[0010] In one possible design, a pin is detachably inserted between the U-shaped frame and the far or near hole of the connector, and a pull ring is rotatably provided on the outside of the pin.

[0011] In one possible design, multiple connecting rods are slidably arranged through both sides of the second transport frame. A connecting frame is fixedly installed at the lower end of two symmetrical connecting rods. A straight support roller is rotatably arranged between the two symmetrical connecting frames. An electric push rod is embedded above the multiple connecting rods of the second transport frame. The output end of the electric push rod is fixedly connected to the top end of the connecting rod.

[0012] In one possible design, multiple support frames are fixedly installed on both sides of the top of the second transport frame, and the same three-roller is installed on two symmetrical support frames. Both ends of the three-roller are threaded with washers and nuts, and the three-roller is installed on the support frame through the washers and nuts.

[0013] In one possible design, the inner end of the pin has a through hole, and a bolt can be inserted into the through hole. The threaded end of the bolt is threadedly connected to a locking nut.

[0014] In this application, upon initial use, first prepare the necessary installation components, ensuring that none are damaged or missing. Then, place the first section of the two-stage frame stably in the installation position. Place the connectors within the U-shaped frames on both sides of its front end. Note the orientation of the connectors: the narrower part (i.e., the narrower T-shape) should face upwards, and the wider part (i.e., the wider T-shape) downwards. In other words, the near-distance hole should be at the top, and the far-distance hole at the bottom (e.g.,...). Figure 2 (As shown), then insert the pin into the corresponding hole of the U-shaped frame and the connector, so that the pin passes through the near hole or far hole of the U-shaped frame and the connector. The pull ring on the outside of the pin can facilitate subsequent disassembly. Then insert the bolt into the through hole opened at the inner end of the pin, and then screw the locking nut on the threaded end of the bolt. By tightening the locking nut, the connector is firmly fixed to the front end of the first section of the second transport frame.

[0015] Because after the front end of the first section of the second transport frame is fixedly installed, its rear end will be in an upward tilted state (e.g. Figure 1 As shown), at this point, place the two connectors inside the U-shaped frame at the rear end of the first section of the second transport frame. Note that the placement direction of the connectors is different from that at the front end (it is the opposite state), that is, the near-distance hole is at the bottom and the far-distance hole is at the top, that is, the narrow part of the connector is at the bottom and the wide part is at the top (as shown). Figure 2 (As shown), and insert the pin again between the U-shaped frame and the connector to ensure a secure connection. Then, insert the bolt into the through hole at the inner end of the pin and tighten the locking nut on the threaded end of the bolt to ensure a secure connection between the connector and the U-shaped frame.

[0016] Then, bring the front end of the second section of the second transport frame close to the rear end of the first section of the second transport frame, so that the U-shaped frame at the front end of the second section of the second transport frame is inserted into the outside of the connector at the rear end of the first section of the second transport frame. Then, following the method of installing the pin at the front end, insert the pin between the U-shaped frame and the connector, and fix it with bolts and locking nuts.

[0017] After the above installation, the front end of the first section of the secondary conveyor frame is tilted upwards, increasing the height of the secondary conveyor frame and making it less likely for the tail pulley of the secondary conveyor belt to be pressed when the roadheader reverses. The rear end is adjusted to be horizontal through the connecting parts, changing the secondary conveyor belt from a straight line to a zigzag line, with more space at the included angle (e.g. Figure 1 As shown in the figure, this prevents the secondary conveyor belt from being too low to press on the tail roller of the tertiary conveyor, protects the belt, and increases the backward distance by about 1 meter.

[0018] This utility model has the following beneficial effects:

[0019] By incorporating connecting components, this invention reduces the risk of the roadheader damaging the belt and tail roller during reversal, effectively preventing slippage and smoke accidents caused by belt pressure. It also increases the roadheader's operating space, allowing for an additional 1 meter of progress per shift and over 50 meters of progress per month, thereby improving labor efficiency and creating conditions for safe production. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the tunnel boring machine's two-transport structure proposed in this utility model;

[0021] Figure 2 This is a schematic diagram showing the overall disassembly and partial enlargement of the two-transport structure of the tunnel boring machine proposed in this utility model;

[0022] Figure 3 This is a schematic diagram of the separation structure of the two-transport frame and the three-link idler rollers in the two-transport structure of the roadheader proposed in this utility model;

[0023] Figure 4 This is a bottom view and a partially enlarged structural schematic diagram of the secondary transport frame of the tunnel boring machine's secondary transport structure proposed in this utility model.

[0024] In the diagram: 1. Secondary support frame; 2. Connecting component; 201. Near-distance hole; 202. Far-distance hole; 3. Support frame; 4. Three-section idler roller; 5. Washer nut; 6. U-shaped frame; 7. Pin; 8. Pull ring; 9. Bolt; 10. Locking nut; 11. Connecting rod; 12. Electric push rod; 13. Connecting frame; 14. Straight idler roller. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Example 1

[0027] Reference Figure 1-4 Roadheaders, including:

[0028] The second transport frame 1 serves as the main frame of the entire second transport structure. Four U-shaped frames 6 are welded to its two sides in a rectangular manner. The two U-shaped frames 6 on each side are positioned correspondingly and are used together to install the connecting parts 2. This provides a stable foundation for the connection between multiple sections of the second transport frame 1, which not only increases the overall height of the second transport frame 1, but also allows for flexible adjustment of the angle of subsequent connections to adapt to different working environments.

[0029] The connector 2 adopts a T-shaped design, which allows it to better cooperate with the U-shaped frame 6 to achieve a reliable connection. Two far-distance holes 202 are symmetrically opened at the wider part of the T-shaped connector 2, and two near-distance holes 201 are symmetrically opened at the narrower part. The distance between the two far-distance holes 202 is 15 mm larger than the distance between the two near-distance holes 201. This difference in hole spacing distinguishes the installation of the connector 2 in different positions, facilitating different connection effects. During installation, special attention must be paid to the placement direction of the connector 2 at the front and rear ends of the second-stage transport frame 1. When installing the connector 2 at the front end of the first section of the second-stage transport frame 1, the narrow part of the connector 2 (i.e., the narrower part of the T-shape) should face upwards, and the wide part (i.e., the wider part of the T-shape) should face downwards, meaning the near-distance hole 201 is above and the far-distance hole 202 is below. When installing the connector 2 at the rear end of the first section of the second-stage transport frame 1, the direction is reversed, i.e., the near-distance hole 201 is below and the far-distance hole 202 is above, meaning the narrow part of the connector 2 is below and the wide part is above. This different installation direction design is to achieve a state where the front end of the second transport frame 1 is tilted upward and the rear end is horizontal, so that the second transport belt changes from a straight line to a broken line, increasing the included angle space and preventing the second transport belt from being too low to press on the tail roll of the third transport machine.

[0030] The U-shaped frame 6 and the connector 2 are connected by a pin 7 through a detachable insertion hole 202 or a near hole 201. A pull ring 8 is rotatably provided on the outside of the pin 7. The design of the pull ring 8 facilitates the pulling out of the pin 7. During installation and disassembly, the operator can easily operate the pin 7 with the help of the pull ring 8, which improves work efficiency.

[0031] Multiple connecting rods 11 are slidably arranged on both sides of the second transport frame 1. The lower ends of two symmetrical connecting rods 11 are fixedly connected to connecting frames 13, and the same straight idler roller 14 is rotatably arranged between the two symmetrical connecting frames 13. Above the multiple connecting rods 11, electric push rods 12 (or hydraulic push rods or hydraulic cylinders) are embedded in the second transport frame 1. The output end of the electric push rod 12 is fixedly connected to the top end of the connecting rod 11. Through the extension and retraction of the electric push rod 12, the connecting rod 11 can be driven to slide up and down, thereby realizing the adjustment of the height of the straight idler roller 14 to meet the tension requirements of the belt under different working conditions.

[0032] Multiple support frames 3 are evenly distributed on both sides of the top of the second transport frame 1. The same triple roller 4 (three rotating rollers connected by a connecting rod and forming a U-shape) is installed on two symmetrical support frames 3. Both ends of the triple roller 4 are threaded with washers and nuts 5. The triple roller 4 is installed on the support frame 3 by the washers and nuts 5. This installation method ensures the stability of the triple roller 4 and facilitates subsequent maintenance and replacement.

[0033] This application can be used in the field of tunnel boring machine secondary transport technology, or in other fields applicable to this application.

[0034] Example 2

[0035] Based on Embodiment 1, Embodiment 2 further includes: a secondary transport structure for a roadheader, which is applied to the field of secondary transport technology for roadheaders. The inner end of the pin 7 is provided with a through hole, and a bolt 9 can be inserted into the through hole. The threaded end of the bolt 9 is threadedly connected to a locking nut 10. After the pin 7 is inserted into the hole of the U-shaped frame 6 and the connecting piece 2, the bolt 9 is inserted into the through hole at the inner end of the pin 7 and the locking nut 10 is tightened. This ensures that the connection between the pin 7 and the U-shaped frame 6 and the connecting piece 2 is firm and reliable, preventing loosening during operation.

[0036] However, as is well known to those skilled in the art, the working principle and wiring method of the electric actuator 12 are commonplace and are all conventional means or common knowledge, so they will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0037] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A two-transport structure of a fully-mechanized coal mining machine, characterized in that, include: The second transport frame (1) has four U-shaped frames (6) fixedly installed on both sides in a rectangular shape. The same connector (2) is installed in the two U-shaped frames (6) on the same side. The connector (2) is used to connect multiple sections of the second transport frame (1). It can not only increase the height of the second transport frame (1), but also change the angle of subsequent connections of the second transport frame (1).

2. The face machine and conveyor structure according to claim 1, characterized in that The connector (2) is T-shaped. The T-shaped connector (2) has two far-distance holes (202) symmetrically opened in the wider position and two near-distance holes (201) symmetrically opened in the narrower position.

3. The face machine and conveyor structure according to claim 2, characterized in that The distance between the two far-distance holes (202) is 15 mm greater than the distance between the two near-distance holes (201).

4. The continuous miner face structure of claim 1, wherein, A pin (7) is detachably inserted between the U-shaped frame (6) and the far-distance hole (202) or near-distance hole (201) of the connector (2), and a pull ring (8) is rotatably provided on the outside of the pin (7).

5. The continuous miner face structure of claim 1, wherein, Multiple connecting rods (11) are slidably arranged through both sides of the second transport frame (1). A connecting frame (13) is fixedly arranged at the lower end of each of the two symmetrical connecting rods (11). The same straight roller (14) is rotatably arranged between the two symmetrical connecting frames (13). An electric push rod (12) is embedded above each of the multiple connecting rods (11) of the second transport frame (1). The output end of the electric push rod (12) is fixedly connected to the top end of the connecting rod (11).

6. The face machine and conveyor structure according to claim 5, wherein Multiple support frames (3) are evenly distributed on both sides of the top of the two transport frames (1). The same three-section roller (4) is provided on two symmetrical support frames (3). Both ends of the three-section roller (4) are threaded with gasket nuts (5). The three-section roller (4) is installed on the support frame (3) through gasket nuts (5).

7. The dual-transport structure of the roadheader according to claim 4, characterized in that, The inner end of the pin (7) is provided with a through hole, and a bolt (9) can be inserted into the through hole. The bolt (9) is threaded at one end and a locking nut (10) is threaded to it.

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