A system for tensioning a belt of a roadheader second conveyor

Abstract

This invention discloses a system for tensioning the conveyor belt of a tunneling machine's secondary conveyor belt, comprising: a first fixing component fixed to the first end of the secondary conveyor belt joint; a second fixing component fixed to the second end of the secondary conveyor belt joint; and a hand-operated hoist, the lower hook of which is fixed to the first fixing component by a rope, and the upper hook of which is fixed to the second fixing component by a rope. The hoist's chain is used for manual pulling, thereby pulling the first and second ends of the secondary conveyor belt joint closer together through the first and second fixing components, thus fastening or removing the belt buckles at both ends of the joint. This invention, through manual and slow tensioning using a hand-operated hoist, can precisely control the belt tension, avoiding problems such as slippage due to excessive looseness or damage to the belt due to excessive tightness, ensuring smooth operation of the secondary conveyor belt, and preventing malfunctions such as deviation, slippage, and material accumulation.

Description

Technical Field

[0001] This invention belongs to the technical field of tunneling machine auxiliary equipment, and in particular relates to a system for tensioning the belt of the secondary conveyor of a tunneling machine. Background Technology

[0002] The secondary conveyor belt, which is paired with the tunneling machine, is a key piece of equipment for muck removal and material transport in underground tunneling faces. During tunnel excavation, the length of the secondary conveyor belt is usually within 260 meters, which is considered a short-distance telescopic belt. Under conditions of long-term operation, repeated start-stop, material impact, and vibration of the tunnel floor, the belt is prone to problems such as slackness, sagging, slippage, and deviation, which seriously affect the belt conveying efficiency and can also cause abnormal belt wear, material accumulation, and unstable belt speed.

[0003] The retractable conveyor belt used in underground tunneling continuously shortens as the working face advances, causing plastic elongation due to prolonged load. Traditional screw tensioning devices have short adjustment strokes and lack automatic compensation capabilities. After the belt elongates, the tensioning mechanism quickly reaches its adjustment limit, leaving no tension margin. The only way to restore tension is to stop the machine, cut the belt, and reconnect it. Due to the limitations of tunnel space and the retractable machine body, the secondary conveyor belt is only equipped with a short-stroke manual screw tensioner. After the belt elongates, there is no adjustment margin, and manual disconnection and belt cutting are the only options. Summary of the Invention

[0004] The purpose of this invention is to provide a system for tensioning the belt of the secondary conveyor of a tunneling machine, in order to solve the problem that the secondary conveyor belt of the tunneling machine is only equipped with a short-stroke manual screw tensioner, and there is no adjustment margin after the belt stretches, so the only solution is to manually disconnect the joint and cut the belt.

[0005] The present invention adopts the following technical solution: a system for tensioning the belt of the secondary conveyor of a tunneling machine, the system being used to tension a belt of less than 260 meters of the secondary conveyor of the tunneling machine, wherein the two ends of the belt joint are the first end and the second end of the belt, respectively. The system includes: The first fixing component is fixed to the first end of the second conveyor belt joint; The second fixing component is fixed to the second end of the second conveyor belt joint; The hand-operated chain hoist has a lower hook fixed to a first fixed component by a rope, and an upper hook fixed to a second fixed component by a rope. The chain is used for manual pulling, which in turn pulls the first and second ends of the belt joint closer together through the first and second fixed components, thereby fastening or removing the belt buckle at both ends of the belt joint. The first fixing component includes: Two first force-bearing plates are respectively attached to both sides of the belt; each of them has a first force-bearing hole. The first force-bearing rod passes sequentially through the first force-bearing hole of the first force-bearing plate located on the upper side of the belt, the belt, and the first force-bearing hole of the first force-bearing plate located on the lower side of the belt before being fixed; its lower end is fixedly connected to the lower hook of the hand-operated hoist by a rope. The second fixing component includes: Two secondary force-bearing plates are respectively attached to both sides of the belt; each plate has a secondary force-bearing hole. The second force-bearing rod passes sequentially through the second force-bearing hole of the second force-bearing plate located on the upper side of the belt, the belt, and the second force-bearing hole of the second force-bearing plate located on the lower side of the belt before being fixed; its lower end is fixedly connected to the upper hook of the hand-operated hoist by a rope.

[0006] The beneficial effects of this invention are: This invention allows for precise control of belt tension by manually and slowly tensioning the belt with a hand chain hoist. This avoids problems such as slippage due to excessive looseness or damage to the belt due to excessive tightness, ensuring smooth operation of the secondary conveyor belt and preventing malfunctions such as deviation, slippage, and material accumulation. This invention, by setting two first fixing components and a second fixing component, forms a multi-point, distributed force-bearing structure at both ends of the belt joint, solving the defect of concentrated force in single-point clamping, effectively preventing belt compression deformation, skin cracking, and local damage, and improving the safety and reliability of tensioning operations. Attached Figure Description

[0007] Figure 1 This is a side view of the present invention; Figure 2 This is a bottom view of the present invention; Figure 3 This is a top view of the present invention.

[0008] Wherein: 10, first fixing component; 11, second fixing component; 12, hand chain hoist; 13, first force plate; 14, first force rod; 15, second force plate; 16, second force rod; 17, belt; 18, hand chain. Detailed Implementation

[0009] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0010] 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.

[0011] This invention discloses a system for tensioning the conveyor belt of a tunneling machine, such as... Figure 1-3 As shown, the system is used to tension the less than 260-meter belt 17 of the tunnel boring machine. The two ends of the belt 17 joint are the first end and the second end of the belt 17, respectively.

[0012] The system mainly includes a first fixing component 10, a second fixing component 11, and a hand chain hoist 12. There are two first fixing components 10, which are set at a predetermined distance apart; there are two second fixing components 11, which are also set at a predetermined distance apart.

[0013] The two first fixing components 10 are used to cooperate with each other to apply force to the first end of the belt 17 joint, so as to avoid the belt 17 being damaged due to excessive force concentration. The two second fixing components 11 are used to cooperate with each other to apply force to the second end of the belt 17 joint, so as to avoid the belt 17 being damaged due to excessive force concentration.

[0014] Two first fixing components 10 are respectively arranged at the 1 / 3 and 2 / 3 equidistant lines of the width of the belt 17; two second fixing components 11 are respectively arranged at the 1 / 3 and 2 / 3 equidistant lines of the width of the belt 17.

[0015] Two first fixing components 10 are fixed to the first end of the belt joint, forming a dual-point clamping force-bearing structure; two second fixing components 11 are fixed to the second end of the belt joint, forming a dual-point clamping force-bearing structure at the other end. The two ends of the hand chain hoist 12 are respectively connected to the first fixing components 10 and the second fixing components 11, realizing the relative pulling and tensioning of the two ends of the belt joint.

[0016] Specifically, the first fixing component 10 includes two first force-bearing plates 13 and a first force-bearing rod 14. The two first force-bearing plates 13 are respectively attached to and clamped on the upper and lower sides of the belt 17, and each of the two first force-bearing plates 13 has a corresponding first force-bearing hole; the first force-bearing rod 14 passes through the first force-bearing hole of the upper first force-bearing plate 13, the belt 17 body, and the first force-bearing hole of the lower first force-bearing plate 13 in sequence. After installation, it is fixed by end limiting, so that the two first force-bearing plates 13 firmly clamp the first end of the belt 17 joint, forming a reliable force-bearing fulcrum.

[0017] The second fixing component 11 includes two second force-bearing plates 15 and a second force-bearing rod 16. The two second force-bearing plates 15 are respectively attached to and clamped on the upper and lower sides of the belt 17, and each of the two second force-bearing plates 15 has a corresponding second force-bearing hole; the second force-bearing rod 16 passes through the second force-bearing hole of the upper second force-bearing plate 15, the belt 17 body, and the second force-bearing hole of the lower second force-bearing plate 15 in sequence. After being inserted, it is limited and fixed, so as to achieve a stable clamping and fixing of the second end of the belt 17 joint.

[0018] By setting two first fixing components 10 and a second fixing component 11, a front and rear double-support force structure is formed, which disperses the tension force and avoids stress concentration at a single point.

[0019] The manual chain hoist 12 is a manually operated tensioning power component. The lower hook of the manual chain hoist 12 is fixed to the force-bearing rod of the first fixed component 10 by a rope, and the upper hook of the manual chain hoist 12 is fixed to the force-bearing rod of the second fixed component 11 by a rope. During operation, the operator manually pulls the chain 18 of the manual chain hoist 12, which gradually shortens the distance between the two ropes, thereby pulling the first and second ends of the belt 17 joint closer together, thus tensioning and tightening the slack secondary conveyor belt.

[0020] This invention has a simple structure, is easy to assemble and disassemble, requires no auxiliary power, and is perfectly suited for the daily maintenance and tensioning of short-distance secondary conveyor belts in underground tunneling faces. It is highly safe, practical, and has high promotional value.

[0021] 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 system for tensioning the conveyor belt of a tunneling machine, characterized in that, The system is used to tension a belt (17) of less than 260 meters for the second transport of the tunneling machine. The two ends of the belt (17) joint are the first end and the second end of the belt (17), respectively. The system includes: The first fixing component (10) is fixed to the first end of the second conveyor belt (17) joint; The second fixing component (11) is fixed to the second end of the joint of the second conveyor belt (17); The hand chain hoist (12) has its lower hook fixed to the first fixed component (10) by a rope, and its upper hook fixed to the second fixed component (11) by a rope. Its hand chain (18) is used for manual pulling, and then the first and second ends of the joint of the second conveyor belt (17) are pulled closer to each other by the first fixed component (10) and the second fixed component (11), so that the two ends of the joint of the belt (17) are fastened or the belt buckle of the joint is removed. The first fixing component (10) includes: Two first force-bearing plates (13) are respectively attached to both sides of the belt (17); each of them has a first force-bearing hole. The first force-bearing rod (14) passes through the first force-bearing hole of the first force-bearing plate (13) located on the upper side of the belt (17), the belt (17), and the first force-bearing hole of the first force-bearing plate (13) located on the lower side of the belt (17) and is then fixed; its lower end is fixedly connected to the lower hook of the hand chain hoist (12) by a rope. The second fixing component (11) includes: Two second force-bearing plates (15) are respectively attached to both sides of the belt (17); each of them has a second force-bearing hole. The second force-bearing rod (16) passes through the second force-bearing hole of the second force-bearing plate (15) located on the upper side of the belt (17), the belt (17), and the second force-bearing hole of the second force-bearing plate (15) located on the lower side of the belt (17) and is then fixed; its lower end is fixedly connected to the upper hook of the hand-operated hoist (12) by a rope.

2. The system for tensioning the conveyor belt of a tunneling machine according to claim 1, characterized in that, Two first fixing components (10) are provided and are set apart by a predetermined distance; two second fixing components (11) are provided and are set apart by a predetermined distance; The two first fixing components (10) are used to cooperate with each other to apply force to the first end of the belt (17) joint, so as to avoid the belt (17) from being damaged due to excessive force concentration. The two second fixing components (11) are used to cooperate with each other to apply force to the second end of the belt (17) joint, so as to avoid the belt (17) from being damaged due to excessive force concentration.

3. A system for tensioning the conveyor belt of a tunneling machine according to claim 2, characterized in that, The two first fixing components (10) are respectively arranged at the 1 / 3 and 2 / 3 equidistant lines of the width of the belt (17); the two second fixing components (11) are respectively arranged at the 1 / 3 and 2 / 3 equidistant lines of the width of the belt (17).

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