A telescopic device for a tracked self-propelled tail section system

Abstract

This invention discloses a telescopic device for the tail of a belt conveyor. The telescopic device is located between the tail traction equipment and the standard intermediate section. The telescopic device extends when the tail traction equipment moves forward, and is then manually retracted forward, creating a gap between the telescopic device and the standard intermediate section. An intermediate belt frame is added at this gap, allowing the intermediate belt frame to connect with the standard intermediate section and cooperate to continuously transport coal. This invention connects directly to the tail traction equipment and utilizes the continuous extension of multiple telescopic units to achieve continuous tunneling without stopping the machine. The device is retracted after a work cycle maintenance, greatly saving working time and improving tunneling efficiency.

Description

Technical Field

[0001] This invention belongs to the field of coal mining equipment, and particularly relates to a telescopic device for a tracked self-propelled tail section system. Background Technology

[0002] The tail section is the rear part of a belt conveyor. In most belt conveyors, the rotary drum frame is directly connected to the intermediate frame, and there is no independent tail section. However, in large belt conveyors with long distances, high capacity, and high belt speeds, especially extendable belt conveyors, the tail section is an independent mechanism separate from the intermediate frame. In underground face roadway transportation, the tail section connects the belt conveyor and the bridge transfer conveyor, ensuring high-yield and efficient transportation at the working face. During underground tunneling, as the working face advances, the belt conveyor needs to be continuously extended. This extension process includes supplementing the intermediate frame and moving the tail section. Because underground equipment is mostly heavy and conditions are harsh, the movement of the tail section is generally accomplished by a large amount of manpower or mechanical force. Before the advent of self-moving tail sections, traditional fixed tail sections had long tail frames to provide moving tracks and coal drop point buffers for bridge transfer machines. When the transfer machine advanced forward with the working face to the limit of the fixed tail section, the tail section could only be moved towards the head section during shutdown maintenance. The heavy tail section was moved forward by winch wire rope traction or hydraulic jack traction.

[0003] With the rapid development of high-efficiency fully mechanized mining faces, the number of mining roadways consumed annually has increased significantly. However, insufficient preparation of coal mine roadways and low tunneling efficiency have become common key problems restricting the efficient and intensive production of large mines. The underground transportation system in coal mines is one of the important factors affecting roadway tunneling efficiency.

[0004] Currently, there are two main types of equipment for efficient underground transportation systems: (1) a combination of shuttle car, feed crusher, and roadway belt conveyor; and (2) a combination of continuous transportation system and roadway belt conveyor. The first type of transportation system is intermittent transportation. The shuttle car runs back and forth between the continuous coal mining machine and the feed crusher to carry out receiving-transporting-unloading operations. The shuttle car travels back and forth, resulting in wasted time. The feed crusher is directly connected to the tail of the roadway belt conveyor, requiring frequent extension of the conveyor belt, which affects production efficiency. The second type of transportation system is continuous transportation. The receiving end of the continuous transportation system directly follows the continuous coal mining machine, and the unloading end is connected to the roadway conveyor belt with a certain equipment follow-up margin. It can realize continuous operation of receiving-transporting-unloading, but it has disadvantages such as many system equipment, large size, complex operation coordination, and poor flexibility.

[0005] At present, the matched transportation systems for rapid excavation by integrated bolter-miners are generally divided into two types. The first transportation system is a bendable flexible belt transfer machine + a self-moving tail + a belt conveyor; the second transportation system is a bridge transfer machine + a self-moving tail + a belt conveyor. These two transportation systems each have their own advantages, but both have the problems of short lapping stroke, failure to meet the daily footage requirement and frequent belt extension. During excavation work, with the continuous advancement of the working face, although there is a certain lapping stroke between the self-moving tail and the transfer machine, the lapping stroke is generally not long, and it is still necessary to stop the machine frequently to extend the length of the belt conveyor. Summary of the Invention

[0006] The purpose of the present invention is to provide a telescopic device for a crawler-type self-moving tail system, so as to solve the problem of frequent shutdown caused by frequent replenishment of intermediate belt frames when the main excavation equipment moves forward.

[0007] The present invention adopts the following technical solution: a telescopic device for the tail of a belt conveyor, the telescopic device is located between the tail traction device and a standard middle part, the telescopic device is extended when the tail traction device advances forward, and then the telescopic device is manually retracted forward so that a gap is formed between the telescopic device and the standard middle part, and an intermediate belt frame is added in the gap, so that the intermediate belt frame and the standard middle part are butted with each other and cooperate to continuously transport coal;

[0008] The telescopic device is formed by connecting a plurality of telescopic units in sequence, and each telescopic unit comprises:

[0009] a shifting base, which is a frame body; used for moving forward under the pulling of the tail traction device;

[0010] an oil cylinder frame, which is sleeved on the shifting base, and a shifting oil cylinder is arranged therein, the shifting oil cylinder is used for extending after the shifting base is pulled to the limit, forcing the oil cylinder frame to move forward and overlap with the shifting base;

[0011] the shifting base is further configured to move forward again when the tail traction device moves forward after the oil cylinder frame overlaps with the shifting base;

[0012] the shifting oil cylinder is further configured to retract after the shifting base moves forward again, and pull the shifting base of the left telescopic unit to move forward, and this reciprocation causes a gap to be formed between the telescopic device and the standard middle part.

[0013] Further, the shifting base is composed of a rear stop rod, a right sliding plate, a front connecting plate and a left sliding plate which are connected end to end in sequence, both the right sliding plate and the left sliding plate are L-shaped, and both are composed of a horizontally arranged bottom sliding plate and a vertically arranged vertical baffle, the bottom sliding plate is fixedly connected with the vertical baffle, and the area formed between the bottom sliding plate and the vertical baffle is used for the oil cylinder frame to move back and forth therein.

[0014] Furthermore, the cylinder frame includes:

[0015] The left hydraulic cylinder is arranged in a front-to-back direction, and a left pusher hydraulic cylinder is installed inside it.

[0016] The right cylinder is arranged in a front-to-back direction and contains a right push cylinder; the fixed ends of the left and right push cylinders are fixedly connected to the front sides of the left and right cylinders, respectively, and their movable ends are fixedly connected to the push base of the telescopic unit on the left side.

[0017] The rear cylinder plate is fixedly connected to the rear ends of the left and right cylinder barrels, respectively.

[0018] The front cylinder plate is fixedly connected to the front ends of the left and right cylinder barrels respectively, and cooperates with the left cylinder barrel, the rear cylinder plate and the right cylinder barrel in sequence to form a cylinder frame.

[0019] Furthermore, it also includes:

[0020] The limiting mechanism is located on the lower side of the rear derailleur and its two ends are fixed to the inner sides of the right and left sliding plates, respectively. The limiting mechanism is used to lock into the inner sides of the left and right cylinder barrels and ensure the relative position of the pushing base and the cylinder frame when the left and right pushing cylinders extend or retract.

[0021] The limiting mechanism is located on the rear side of the front cylinder plate, thereby limiting the front cylinder plate and the pushing base.

[0022] Furthermore, two limiting plates arranged in a left-right direction are fixedly connected to the inner sides of both the left and right cylinder barrels. The two limiting plates are used for the insertion of the limiting mechanism to limit the movement of the base.

[0023] Furthermore, the limiting mechanism includes:

[0024] The limiting cylinder has its fixed end fixed to the lower side of the rear stop lever; its movable end extends to the left and right sides and its end is fixedly connected to a limiting block; the two limiting blocks are used to extend between the two limiting plates, thereby limiting the pushing base.

[0025] The beneficial effects of this invention are:

[0026] This invention connects directly to the tail traction equipment and utilizes the continuous extension of multiple telescopic units to achieve continuous tunneling without stopping the machine. The device is then retracted when a work cycle is completed for maintenance, which greatly saves working time and improves tunneling efficiency.

[0027] The telescopic unit of this invention can select the number of sections according to the actual tunneling progress and maintenance time of different roadways, with a wide tolerance range. By setting left and right push cylinders, this invention can achieve autonomous extension and retraction. It can quickly extend the conveyor belt when the tunneling head advances and can also quickly retract during maintenance, reducing the working difficulty of underground workers, speeding up maintenance, and saving time. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the present invention in a contracted state;

[0029] Figure 2-7 The following are schematic diagrams of the structure of each step in the progressive development of this invention;

[0030] Figure 8 This is a cross-sectional view of the limiting mechanism.

[0031] in:

[0032] 10. Sliding base; 11. Rear stop lever; 12. Right slide plate; 13. Front connecting plate; 14. Left slide plate; 15. Bottom slide plate; 16. Vertical baffle;

[0033] 20. Hydraulic cylinder frame; 21. Left hydraulic cylinder barrel; 22. Right hydraulic cylinder barrel; 23. Rear hydraulic cylinder plate; 24. Front hydraulic cylinder plate; 25. Left push-pull hydraulic cylinder; 26. Right push-pull hydraulic cylinder;

[0034] 30. Limiting mechanism; 31. Limiting plate; 32. Limiting cylinder; 33. Limiting block. Detailed Implementation

[0035] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0036] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "multiple" means two or more. The term "orientation" in this invention refers to the orientation of the device or element according to the invention. Figure 1 Description of the state's progression.

[0037] The existing articulated telescopic device has two problems. First, it has a long track that, when the telescopic device is compressed, does not compress but remains exposed, affecting the subsequent intermediate conveyor belt. Second, the articulated telescopic device cannot compress itself; it requires the assistance of a second vehicle to compress it.

[0038] Therefore, this invention discloses a telescopic device for a tracked self-propelled tail section system, such as... Figure 1 As shown, the telescopic device is located between the tail traction equipment and the standard intermediate section. The telescopic device is used to extend when the tail traction equipment moves forward, and then manually retract the telescopic device forward to create a gap between the telescopic device and the standard intermediate section. An intermediate belt frame is added at this gap so that the intermediate belt frame and the standard intermediate section can be connected to each other and cooperate to continuously transport coal.

[0039] The telescopic device is composed of multiple telescopic units connected in sequence. Each telescopic unit includes: a push base 10 and a hydraulic cylinder frame 20.

[0040] The push base 10 is a frame; the push base 10 is used to move forward under the pull of the tail traction equipment; the cylinder frame 20 is sleeved on the push base 10, and the cylinder frame 20 is provided with a push cylinder. The push cylinder is used to extend after the push base 10 is pulled to the limit, forcing the cylinder frame 20 to move forward and overlap with the push base 10.

[0041] The push base 10 is also used to move forward again when the tail traction device moves forward after the cylinder frame 20 overlaps with the push base 10; the push cylinder is also used to retract after the push base 10 moves forward again, and pull the push base 10 of the left telescopic unit to move forward, so that a gap appears between the telescopic device and the standard middle part.

[0042] The push base 10 consists of a rear stop bar 11, a right slide plate 12, a front connecting plate 13, and a left slide plate 14 connected end to end. The right slide plate 12 and the left slide plate 14 are both "L" shaped and each consists of a horizontally arranged bottom slide plate 15 and a vertically arranged vertical baffle 16. The bottom slide plate 15 is fixedly connected to the vertical baffle 16, and the area formed between the bottom slide plate 15 and the vertical baffle 16 is used for the cylinder frame 20 to move back and forth within it.

[0043] The cylinder frame 20 includes: a left cylinder barrel 21, a right cylinder barrel 22, a rear cylinder plate 23, and a front cylinder plate 24.

[0044] The left cylinder 21 is arranged in a front-to-back direction, and a left push cylinder 25 is installed inside the left cylinder 21. The right cylinder 22 is arranged in a front-to-back direction, and a right push cylinder 26 is installed inside the right cylinder 22. The fixed ends of the left push cylinder 25 and the right push cylinder 26 are fixedly connected to the front side of the left cylinder 21 and the right cylinder 22, respectively. The movable ends of the left push cylinder 25 and the right push cylinder 26 are fixedly connected to the push base 10 of the telescopic unit on the left side.

[0045] The rear cylinder plate 23 is fixedly connected to the rear ends of the left cylinder barrel 21 and the right cylinder barrel 22 respectively; the front cylinder plate 24 is fixedly connected to the front ends of the left cylinder barrel 21 and the right cylinder barrel 22 respectively, and the front cylinder plate 24 cooperates with the left cylinder barrel 21, the rear cylinder plate 23 and the right cylinder barrel 22 in sequence to form the cylinder frame 20.

[0046] The present invention further includes: a limiting mechanism 30, which is located below the rear stop lever 11 and whose two ends are respectively fixed to the inner sides of the right slide plate 12 and the left slide plate 14. The limiting mechanism 30 is used to lock into the inner sides of the left cylinder barrel 21 and the right cylinder barrel 22, and to ensure the relative position of the pushing base 10 and the cylinder frame 20 when the left pushing cylinder 25 and the right pushing cylinder 26 extend or retract. The limiting mechanism 30 is located behind the front cylinder plate 24, thereby limiting the front cylinder plate 24 and the pushing base 10.

[0047] The inner sides of the left cylinder 21 and the right cylinder 22 are fixedly connected to two limiting plates 31 arranged in a left-right direction. The limiting mechanism 30 is inserted between the two limiting plates 31 to limit the pushing base 10.

[0048] like Figure 8 As shown, the limiting mechanism 30 includes: a limiting cylinder 32, the fixed end of which is fixed to the lower side of the rear stop bar 11; the movable end of the limiting cylinder 32 extends to the left and right sides and the end of the limiting cylinder 32 is fixedly connected to a limiting block 33; the two limiting blocks 33 are used to extend between the two limiting plates 31, thereby limiting the push base 10.

[0049] The working process of this invention is as follows: Figure 2-7 As shown, they are in the following order:

[0050] Step 1: As Figure 2 As shown, the push base 10 moves forward under the pull of the tail traction device, and moves forward until it is blocked by the limiting mechanism 30 on its left side, that is, it reaches the limit.

[0051] Step 2: As Figure 3As shown, the left push cylinder 25 and the right push cylinder 26 are activated, causing the movable ends of the left push cylinder 25 and the right push cylinder 26 to extend, thereby pushing the cylinder frame 20 forward to move above the push base 10, that is, to overlap with the push base 10.

[0052] Step 3: As Figure 4 As shown, the push base 10 moves forward again under the pull of the tail traction device, and moves forward until it is blocked by the limit mechanism 30 on its left side, that is, it reaches the limit.

[0053] Step 4: As Figure 5 As shown, the left push cylinder 25 and the right push cylinder 26 are activated, causing the movable ends of the left push cylinder 25 and the right push cylinder 26 to retract, thereby pulling the push base 10 of the telescopic unit on the left side to move forward.

[0054] Step 5: As Figure 6 As shown, the left push cylinder 25 and the right push cylinder 26 are activated, causing the movable ends of the left push cylinder 25 and the right push cylinder 26 to extend, thereby pushing the cylinder frame 20 to move forward again to above the push base 10, that is, to overlap with the push base 10.

[0055] Step 6: As Figure 7 As shown, the left push cylinder 25 and right push cylinder 26 of the left telescopic unit are activated, causing the movable ends of the left push cylinder 25 and right push cylinder 26 of the left telescopic unit to extend, thereby pushing the cylinder frame 20 of the left telescopic unit to move forward again to above the left push base 10, that is, to overlap with the left push base 10; this process is repeated to complete the forward movement.

[0056] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A telescopic device for a tracked self-propelled tail section system, characterized in that, The telescopic device is located between the tail traction equipment and the standard intermediate section. The telescopic device is used to extend when the tail traction equipment moves forward, and then manually retract the telescopic device forward to create a gap between the telescopic device and the standard intermediate section. An intermediate belt frame is added at this gap so that the intermediate belt frame and the standard intermediate section can be connected to each other and cooperate to continuously transport coal. The telescopic device is composed of multiple telescopic units connected in sequence, and each telescopic unit includes: The push base (10) is a frame; it is used to move forward under the pull of the tail traction equipment; The cylinder frame (20) is sleeved on the push base (10), and a push cylinder is provided inside it. The push cylinder is used to extend after the push base (10) is pulled to the limit, forcing the cylinder frame (20) to move forward and overlap with the push base (10); The push base (10) is also used to move forward again when the tail traction device moves forward after the cylinder frame (20) overlaps with the push base (10); The push cylinder is also used to retract when the push base (10) moves forward again, and pull the push base (10) of the left telescopic unit forward, so that a gap appears between the telescopic device and the standard middle part.

2. The telescopic device for a tracked self-propelled tail section system according to claim 1, characterized in that, The push base (10) is composed of a rear stop bar (11), a right slide plate (12), a front connecting plate (13), and a left slide plate (14) connected end to end in sequence. The right slide plate (12) and the left slide plate (14) are both "L" shaped and are both composed of a horizontally arranged bottom slide plate (15) and a vertically arranged vertical baffle (16). The bottom slide plate (15) is fixedly connected to the vertical baffle (16). The area formed between the bottom slide plate (15) and the vertical baffle (16) is used for the cylinder frame (20) to move back and forth within it.

3. The telescopic device for a tracked self-propelled tail section system according to claim 1, characterized in that, The cylinder frame (20) includes: The left cylinder (21) is arranged in a front-to-back direction, and a left push cylinder (25) is installed inside it. The right cylinder (22) is arranged in a front-to-back direction and a right push cylinder (26) is installed inside it; the fixed ends of the left push cylinder (25) and the right push cylinder (26) are respectively fixedly connected to the front side of the left cylinder (21) and the right cylinder (22), and their movable ends are respectively fixedly connected to the push base (10) of the telescopic unit on the left side. The rear cylinder plate (23) is fixedly connected to the rear ends of the left cylinder barrel (21) and the right cylinder barrel (22), respectively; The front cylinder plate (24) is fixedly connected to the front end of the left cylinder barrel (21) and the right cylinder barrel (22) respectively, and cooperates with the left cylinder barrel (21), the rear cylinder plate (23) and the right cylinder barrel (22) in sequence to form a cylinder frame (20).

4. A telescopic device for a tracked self-propelled tail section system according to claim 2, characterized in that, Also includes: The limiting mechanism (30) is located on the lower side of the rear stop lever (11) and its two ends are fixed to the inner sides of the right slide plate (12) and the left slide plate (14) respectively. The limiting mechanism (30) is used to lock in the inner sides of the left cylinder barrel (21) and the right cylinder barrel (22), and ensure the relative position of the push base (10) and the cylinder frame (20) when the left push cylinder (25) and the right push cylinder (26) extend or retract. The limiting mechanism (30) is located on the rear side of the front cylinder plate (24), thereby limiting the front cylinder plate (24) and the push base (10).

5. A telescopic device for a tracked self-propelled tail section system according to claim 4, characterized in that, The inner sides of the left cylinder (21) and the right cylinder (22) are fixedly connected to two limiting plates (31) arranged in a left-right direction. The two limiting plates (31) are used for the limiting mechanism (30) to extend into, thereby limiting the push base (10).

6. A telescopic device for a tracked self-propelled tail section system according to claim 4, characterized in that, The limiting mechanism (30) includes: The limiting cylinder (32) has its fixed end fixed to the lower side of the rear stop bar (11); its movable end extends to the left and right sides and its end is fixedly connected to the limiting block (33); the two limiting blocks (33) are used to extend between the two limiting plates (31) to limit the push base (10).

Images