Telescopic device for crawler-type self-moving tail system

Abstract

The utility model discloses a telescopic device for a crawler-type self-moving tail system, which is positioned between tail traction equipment and a standard middle part and is used for stretching when the tail traction equipment moves forwards, and then the telescopic device is manually retracted forwards so as to form a gap between the telescopic device and the standard middle part. A middle belt frame is additionally arranged at the gap, so that the middle belt frame and the standard middle part are in butt joint with each other and are matched to continuously transport the coal; the continuous tunneling device is directly connected with tail traction equipment, continuous tunneling without shutdown is achieved by means of continuous extension of the multiple sections of telescopic units, the device is retracted after one work cycle is overhauled, the working time is greatly saved, and the tunneling efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the field of coal mine equipment, and particularly relates to a telescopic device for a crawler self-shifting tail system. Background Art

[0002] The tail of a belt conveyor is the rear part of the belt conveyor. In a general belt conveyor, the rotary drum frame is directly connected to the intermediate frame without an independent tail. However, in a large belt conveyor with a long conveying distance, a large conveying capacity, and a high belt speed, especially a telescopic belt conveyor, the tail forms an independent mechanism separated from the intermediate frame. In the underground working face gateway transportation, the tail is connected to the belt conveyor and the bridge-type transfer machine, which is an important guarantee for high-yield and high-efficiency transportation in the working face. In underground tunneling work, due to the advancement of the working face, the belt conveyor needs to be continuously extended. The extension process includes the supplement of the intermediate frame and the movement of the tail. Since most underground equipment is heavy and the conditions are harsh, the movement of the tail is generally completed by a large amount of manual or mechanical force. Before the self-shifting tail appeared, the traditional fixed tail had a long tail frame to provide a moving track and a coal dropping point buffer device for the bridge-type transfer machine. When the transfer machine advanced forward to the limit of the fixed tail during production suspension and maintenance, the heavy tail could only be moved towards the head of the belt conveyor. It was pulled forward by a winch steel wire rope or a hydraulic jack.

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

[0004] At present, there are mainly two types of equipment for the underground high-efficiency transportation system: (1) a shuttle car, a feeding crusher, and a gateway belt conveyor are matched; (2) a continuous transportation system and a gateway belt conveyor are matched. The first transportation system is an intermittent transportation. The shuttle car runs back and forth between the continuous miner and the feeding crusher for receiving - transporting - discharging operations. The shuttle car runs back and forth, resulting in time waste. The feeding crusher is directly lapped on the tail of the gateway belt conveyor, and the conveyor belt needs to be frequently extended, affecting the production efficiency. The second transportation system is a continuous transportation. The receiving end of the continuous transportation system directly follows the continuous miner for operation, and the discharging end is lapped on the gateway belt conveyor with a certain equipment follow-up margin, and continuous operations of receiving - transporting - discharging can be achieved. However, it has the disadvantages of many system equipment, large volume, complex operation and coordination, and poor flexibility.

[0005] At present, the post-haulage transportation systems for rapid tunneling of roadheader-anchoring machines are generally divided into two types. The first transportation system is a flexible belt conveyor with a bendable flexible belt conveyor + a self-advancing tail + a belt conveyor; the second transportation system is a bridge-type conveyor + a self-advancing tail + a belt conveyor. These two transportation systems have their own advantages, but they both have the problems of short overlapping travel, inability to meet the daily footage requirements, and frequent belt extension. During tunneling work, as the working face advances continuously, although there is a certain overlapping travel between the self-advancing tail and the conveyor, this overlapping travel is generally not very long, and it is still necessary to frequently stop the machine 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 self-advancing tail system to solve the problem of frequent shutdowns caused by the need to frequently supplement the intermediate belt frames when the main tunneling equipment moves forward.

[0007] The present invention adopts the following technical solutions: A telescopic device for the tail of a belt conveyor, the telescopic device is located between the tail traction device and the standard intermediate section. The telescopic device is used to extend when the tail traction device moves forward, and then manually retract the telescopic device forward, so that a gap appears between the telescopic device and the standard intermediate section, and an intermediate belt frame is added at this gap, so that the intermediate belt frame is docked with the standard intermediate section and cooperates to continuously transport coal;

[0008] The telescopic device is composed of a plurality of telescopic units connected in sequence. Each telescopic unit includes:

[0009] A pushing base, which is a frame; it is used to move forward under the pulling of the tail traction device;

[0010] An oil cylinder frame, which is sleeved on the pushing base, and a pushing oil cylinder is arranged therein. The pushing oil cylinder is used to extend after the pushing base is pulled to the limit, forcing the oil cylinder frame to move forward and overlap with the pushing base;

[0011] The pushing base is also used to move forward again when the oil cylinder frame overlaps with the pushing base and the tail traction device moves forward;

[0012] The pushing oil cylinder is also used to contract after the pushing base moves forward again, and pull the pushing base of the left telescopic unit forward, so that a gap appears between the telescopic device and the standard intermediate section in this way.

[0013] Further, the pushing base is composed of a rear baffle, a right slide plate, a front connecting plate and a left slide plate connected end to end in sequence. The right slide plate and the left slide plate are both "L"-shaped and are both composed of a bottom slide plate arranged horizontally and a vertical baffle arranged vertically. The bottom slide plate is fixedly connected to the vertical baffle, and the area formed between the bottom slide plate and the vertical baffle is used for the front and back movement of the oil cylinder frame therein.

[0014] Furthermore, the oil cylinder frame includes:

[0015] A left oil cylinder barrel, arranged in the front - rear direction, with a left pushing oil cylinder disposed therein.

[0016] A right oil cylinder barrel, arranged in the front - rear direction, with a right pushing oil cylinder disposed therein; the fixed ends of the left pushing oil cylinder and the right pushing oil cylinder are respectively fixedly connected to the front sides of the left oil cylinder barrel and the right oil cylinder barrel, and their movable ends are respectively fixedly connected to the pushing bases of the left - hand telescopic units.

[0017] A rear oil cylinder plate, fixedly connected to the rear ends of the left oil cylinder barrel and the right oil cylinder barrel respectively.

[0018] A front oil cylinder plate, fixedly connected to the front ends of the left oil cylinder barrel and the right oil cylinder barrel respectively, and cooperating with the left oil cylinder barrel, the rear oil cylinder plate and the right oil cylinder barrel in sequence to form the oil cylinder frame.

[0019] Furthermore, it further includes:

[0020] A limiting mechanism, located below the rear rod, and its two ends are respectively fixed to the inner sides of the right slide plate and the left slide plate. The limiting mechanism is used to be stuck inside the left oil cylinder barrel and the right oil cylinder barrel, and to ensure the relative position between the pushing base and the oil cylinder frame when the left pushing oil cylinder and the right pushing oil cylinder extend or contract.

[0021] Wherein, the limiting mechanism is located at the rear side of the front oil cylinder plate, so that the limiting mechanism limits the front oil cylinder plate and also limits the pushing base.

[0022] Furthermore, two limiting plates arranged in the left - right direction are fixedly connected to the inner sides of both the left oil cylinder barrel and the right oil cylinder barrel. The space between the two limiting plates is for the limiting mechanism to extend into, thereby limiting the pushing base.

[0023] Furthermore, the limiting mechanism includes:

[0024] A limiting oil cylinder, its fixed end is fixed below the rear rod; its movable end extends towards the left and right sides, and a limiting block is fixedly connected to its end; the two limiting blocks are used to extend into the space between the two limiting plates, thereby limiting the pushing base.

[0025] The beneficial effects of the present utility model are:

[0026] The present utility model is directly connected to the tail - end traction equipment. By continuously extending multiple telescopic units, continuous tunneling without stopping the machine is achieved. When performing maintenance during one working cycle, the device is retracted, which greatly saves working time and improves tunneling efficiency.

[0027] The telescopic unit of the present utility model can select the number of sections according to the actual driving footage of different roadways and the maintenance time, with a wide fault tolerance range. By setting the left pushing oil cylinder and the right pushing oil cylinder, the present utility model can achieve independent extension and contraction, quickly extend the conveyor belt when the heading face advances, and can also achieve quick contraction during maintenance, reducing the work difficulty of underground workers, accelerating the maintenance speed, and saving time. Description of the Drawings

[0028] Figure 1 It is a schematic structural view of the present utility model in a contracted state;

[0029] Figures 2-7 They are schematic structural views of each step when the present utility model advances step by step in sequence;

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

[0031] Among them:

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

[0033] 20. Oil cylinder frame; 21. Left oil cylinder barrel; 22. Right oil cylinder barrel; 23. Rear oil cylinder plate; 24. Front oil cylinder plate; 25. Left pushing oil cylinder; 26. Right pushing oil cylinder;

[0034] 30. Limiting mechanism; 31. Limiting plate; 32. Limiting oil cylinder; 33. Limiting block. Detailed Description of the Preferred Embodiment

[0035] The present utility model will be described in detail below in conjunction with the drawings and the detailed description of the preferred embodiment.

[0036] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more. The "heading direction" in the present utility model is based on the present utility model being inFigure 1 Description of the trend in the state.

[0037] There are two problems with the existing articulated telescopic device. First, there is a long track. When the telescopic device is compressed, the track does not compress but is exposed, which affects the replenishment of the middle belt conveyor at the back. Second, the articulated telescopic device does not compress itself and needs the second car at the back to assist in compression.

[0038] Therefore, the utility model discloses a telescopic device for a crawler-type self-moving tail system, such as Figure 1 As shown, the telescopic device is located between the tail traction device and the standard middle section, and is used to extend when the tail traction device moves forward, and then be manually retracted forward to create a gap between the telescopic device and the standard middle section, and an intermediate belt frame is added at the gap so that the intermediate belt frame and the standard middle section are docked with each other and cooperate to continuously transport coal.

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

[0040] The push base 10 is a frame; the push base 10 is used to move forward under the pulling of the tail traction equipment; the cylinder frame 20 is mounted on the push base 10, and a push cylinder is arranged in the cylinder frame 20. 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 pushing base 10 is also used to move forward again when the tail traction equipment moves forward after the cylinder frame 20 overlaps with the pushing base 10; the pushing cylinder is also used to retract after the pushing base 10 moves forward again, and pull the pushing base 10 of the left telescopic unit forward, so that a gap appears between the telescopic device and the standard middle part through this reciprocating motion.

[0042] The push base 10 is composed of a rear gear rod 11, a right slide plate 12, a front connecting plate 13 and a left slide plate 14 which are connected end to end in sequence. The right slide plate 12 and the left slide plate 14 are both "L"-shaped and are composed of a horizontally arranged bottom slide plate 15 and a vertically arranged vertical baffle plate 16. The bottom slide plate 15 is fixedly connected to the vertical baffle plate 16. The area formed between the bottom slide plate 15 and the vertical baffle plate 16 is used for the cylinder frame 20 to move forward and backward therein.

[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 oil cylinder barrel 21 is arranged in the front-back direction, and a left pushing oil cylinder 25 is arranged inside the left oil cylinder barrel 21. The right oil cylinder barrel 22 is arranged in the front-back direction, and a right pushing oil cylinder 26 is arranged inside the right oil cylinder barrel 22. The fixed ends of the left pushing oil cylinder 25 and the right pushing oil cylinder 26 are respectively fixedly connected to the front sides of the left oil cylinder barrel 21 and the right oil cylinder barrel 22, and the movable ends of the left pushing oil cylinder 25 and the right pushing oil cylinder 26 are respectively fixedly connected to the pushing base 10 of the left telescopic unit.

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

[0046] The utility model further includes a limiting mechanism 30. The limiting mechanism 30 is located below the rear stop rod 11, and both ends of the limiting mechanism 30 are respectively fixed to the inner sides of the right sliding plate 12 and the left sliding plate 14. The limiting mechanism 30 is used to be stuck inside the left oil cylinder barrel 21 and the right oil cylinder barrel 22, and ensure the relative position between the pushing base 10 and the oil cylinder frame 20 when the left pushing oil cylinder 25 and the right pushing oil cylinder 26 extend or contract. Among them, the limiting mechanism 30 is located behind the front oil cylinder plate 24, so that the limiting mechanism 30 limits the front oil cylinder plate 24 and limits the pushing base 10.

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

[0048] As Figure 8 shown, the limiting mechanism 30 includes a limiting oil cylinder 32. The fixed end of the limiting oil cylinder 32 is fixed below the rear stop rod 11. The movable end of the limiting oil cylinder 32 extends to the left and right sides, and a limiting block 33 is fixedly connected to the end of the limiting oil cylinder 32. The two limiting blocks 33 are used to extend between the two limiting plates 31 to limit the pushing base 10.

[0049] The working process of the utility model, as Figures 2-7 shown, is in sequence:

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

[0051] Step 2: As Figure 3As shown, start the left push cylinder 25 and the right push cylinder 26, so that the movable ends of the left push cylinder 25 and the right push cylinder 26 extend, and then push the cylinder frame 20 forward to above the push base 10, that is, overlap with the push base 10.

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

[0053] Step 4: As Figure 5 shown, start the left push cylinder 25 and the right push cylinder 26, so that the movable ends of the left push cylinder 25 and the right push cylinder 26 retract, and then pull the push base 10 of the left telescopic unit forward.

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

[0055] Step 6: As Figure 7 shown, start the left push cylinder 25 and the right push cylinder 26 of the left telescopic unit, so that the movable ends of the left push cylinder 25 and the right push cylinder 26 of the left telescopic unit extend, and then push the cylinder frame 20 of the left telescopic unit forward again to above the left push base 10, that is, overlap with the left push base 10; repeat this process to complete the forward movement.

[0056] The above is only the preferred embodiment of the present invention, and it is not used to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A telescopic device for a crawler self - moving tail system, characterized in that, The telescopic device is located between the tail traction device and the standard middle part. The telescopic device is used to extend when the tail traction device moves forward, and then manually retract the telescopic device forward so that a gap appears between the telescopic device and the standard middle part. An intermediate belt rack is added at this gap, so that the intermediate belt rack is docked with the standard middle part and cooperates to continuously transport coal; The telescopic device is composed of a plurality of telescopic units connected in sequence. Each telescopic unit includes: A pushing base (10), which is a frame; it is used to move forward under the pulling of the tail traction device; An oil cylinder frame (20), which is sleeved on the pushing base (10). A pushing oil cylinder is arranged inside it. The pushing oil cylinder is used to extend after the pushing base (10) is pulled to the limit, forcing the oil cylinder frame (20) to move forward and overlap with the pushing base (10); The pushing base (10) is also used to move forward again when the oil cylinder frame (20) overlaps with the pushing base (10) and the tail traction device moves forward; The pushing oil cylinder is also used to contract after the pushing base (10) moves forward again, and pull the pushing base (10) of the left telescopic unit forward. In this way, a gap appears between the telescopic device and the standard middle part.

2. The telescopic device for a crawler self - shifting tail system according to claim 1, characterized in that, The pushing base (10) is composed of a rear baffle (11), a right sliding plate (12), a front connecting plate (13) and a left sliding plate (14) connected end to end in sequence. The right sliding plate (12) and the left sliding plate (14) are both "L"-shaped and are both composed of a horizontally arranged bottom sliding plate (15) and a vertically arranged vertical baffle (16). The bottom sliding plate (15) is fixedly connected to the vertical baffle (16). The area formed between the bottom sliding plate (15) and the vertical baffle (16) is used for the front and back movement of the oil cylinder frame (20) inside it.

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

4. The telescopic device for a crawler self-shifting tail system according to claim 2, characterized in that, It also includes: A limiting mechanism (30), located below the rear baffle (11), and its two ends are respectively fixed on the inner sides of the right sliding plate (12) and the left sliding plate (14). The limiting mechanism (30) is used to be stuck inside the left oil cylinder barrel (21) and the right oil cylinder barrel (22), and ensure the relative position of the pushing base (10) and the oil cylinder frame (20) when the left pushing oil cylinder (25) and the right pushing oil cylinder (26) extend or contract; Among them, the limiting mechanism (30) is located at the rear side of the front oil cylinder plate (24), so that the limiting mechanism (30) limits the front oil cylinder plate (24) and limits the pushing base (10).

5. The telescopic device for a crawler self - moving tail system according to claim 4, characterized in that, Two limiting plates (31) arranged in the left-right direction are fixedly connected to the inner sides of the left oil cylinder barrel (21) and the right oil cylinder barrel (22). The limiting mechanism (30) extends between the two limiting plates (31) to limit the pushing base (10).

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

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