Conveying belt loosening method and loosening device

Abstract

The invention provides a conveying belt loosening method and device, and relates to the technical field of conveying equipment, the conveying belt loosening method adopts an operation mode of upper belt clamping and lower belt pulling, multi-clamping-point clamping and loosening are carried out, and the clamping efficiency and safety of a conveying belt are improved. The conveying belt loosening device comprises a first driving clamping mechanism and a second driving clamping mechanism, the first driving clamping mechanism is used for fixedly clamping an upper belt, the second driving clamping mechanism is used for fixedly clamping and movably clamping a lower belt, and the first driving clamping mechanism and the second driving clamping mechanism are matched and conduct multi-clamping-point clamping. The first driving clamping mechanism and the second driving clamping mechanism are used for replacing manual fixing of the conveying belt clamping plate, a chain hoist is used for stretching the conveying belt, the manual operation frequency of field personnel is reduced, and the clamping efficiency and safety of the conveying belt are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of conveying equipment, and in particular to a conveyor belt loosening method and loosening device. Background Art

[0002] The belt conveyor on the main inclined shaft of a coal mine is a means of transporting coal mined underground. The transportation distance is long (several thousand meters) and the transportation slope is large. The downward force of the conveyor belt caused by the inclination is huge, which makes the belt conveyor head drive roller have a problem of high belt tension. The combined force of the conveyor belt on the roller may reach 200 tons. The existing roller winding technology is as follows: Figure 1 shown.

[0003] As the core components of belt conveyors, rollers and conveyor belts need to be replaced and maintained for a long time. During operation, if there is a problem with the roller (such as wear of the roller rubber, roller repair, replacement, etc.), the conveyor belt wrapped around the roller must be loosened to reserve the required working space for work.

[0004] Because the tension of the conveyor belt at the head roller is too large, in this case, the conveyor belt is usually pulled in sections from the tail of the underground machine through a chain, winch, etc., and the excess conveyor belt stored in the tensioning part of the tail is pulled out. After the conveyor belt is pulled from bottom to top to relax the conveyor belt, it is pulled and clamped at multiple points (due to the large tension of the conveyor belt and the small tension of the tail, it is difficult to pull the entire conveyor belt at the head drive at one time. Therefore, the actual operation starts from the tail of the machine, and a small section is pulled and fixed by tools such as a winch, and then the next section is gradually pulled until the head drive, and the conveyor belt at the drive can be relaxed), until the conveyor belt at the head drive is relaxed. This method is not only time-consuming and labor-intensive, but also has certain safety hazards. It usually takes more than 7 days to relax the conveyor belt, causing stagnation in coal mine production, which will seriously affect the production progress of the coal mine. Summary of the invention

[0005] In view of this, one of the purposes of the present invention is to provide a conveyor belt loosening method to solve the technical problem that the conveyor belt is pulled section by section by means of lifting chains, winches, etc. in the prior art, which is not only time-consuming and labor-intensive, but also has certain safety hazards. The conveyor belt loosening work usually takes more than 7 days, causing coal mine production to stagnate, which will seriously affect the production progress of the coal mine.

[0006] A second object of the present invention is to provide a conveyor belt relaxing device. In order to achieve one of the above purposes, the present invention provides a conveyor belt loosening method, comprising the following steps: Step S1: fix the upper conveyor belt with an upper belt fixing clamping point; Step S2: Move the clamping point to clamp the lower conveyor belt, and draw the lower conveyor belt from the tensioning position at the tail of the machine to the roller at the head of the machine to loosen the roller conveyor belt; Step S3: The lower belt fixed clamping point is clamped again, and the movable clamping point is released; Step S4: After the movable clamping point is retracted into position, the conveyor belt is clamped again, the lower belt fixed clamping point is released, and then the roller conveyor belt is loosened.

[0007] Optionally, step S1 to step S4 are repeated multiple times.

[0008] Optionally, the upper belt fixed clamping point adopts a first driving clamping mechanism, and the movable clamping point and the lower belt fixed clamping point adopt a second driving clamping mechanism.

[0009] Optionally, the first driving clamping mechanism and the second driving clamping mechanism are both provided with oil cylinders, and the first driving clamping mechanism and the second driving clamping mechanism adopt two independent hydraulic systems.

[0010] In order to achieve the second of the above-mentioned purposes, the present invention provides a conveyor belt relaxing device used in any of the above-mentioned conveyor belt relaxing methods, the conveyor belt relaxing device comprising a first driving clamping mechanism and a second driving clamping mechanism, the first driving clamping mechanism being used for fixed clamping of the upper belt, and the second driving clamping mechanism being used for fixed clamping and movable clamping of the lower belt.

[0011] Optionally, the first driving clamping mechanism includes a first supporting frame, a first hydraulic cylinder, a first movable clamping plate and a first fixed clamping plate, the first hydraulic cylinder is arranged on the first supporting frame, and the telescopic end of the first hydraulic cylinder is provided with the first movable clamping plate, the first fixed clamping plate is arranged on the first supporting frame and is also located below the first movable clamping plate, and the first hydraulic cylinder drives the first movable clamping plate to move toward or away from the first fixed clamping plate.

[0012] Optionally, the first fixed clamping plate and the first movable clamping plate are both arranged at an incline.

[0013] Optionally, the second drive clamping mechanism includes a mobile drive clamping mechanism, a fixed drive clamping mechanism, a push hydraulic cylinder and a slide rail, the fixed drive clamping mechanism is fixed on one side of the slide rail, the mobile drive clamping mechanism is slidably disposed on the slide rail, and is connected to the fixed drive clamping mechanism through the push hydraulic cylinder.

[0014] Optionally, the mobile drive clamping mechanism includes a second support frame, a second hydraulic cylinder, a second movable clamping plate and a second fixed clamping plate. The second hydraulic cylinder is arranged on the second support frame, and the telescopic end of the second hydraulic cylinder is provided with the second movable clamping plate. The second fixed clamping plate is arranged on the second support frame and is also located below the second movable clamping plate. The second hydraulic cylinder drives the second movable clamping plate to move toward or away from the second fixed clamping plate.

[0015] Optionally, the fixed drive clamping mechanism includes a third support frame, a third hydraulic cylinder, a third movable clamping plate and a third fixed clamping plate. The third hydraulic cylinder is arranged on the third support frame, and the telescopic end of the third hydraulic cylinder is provided with the third movable clamping plate. The third fixed clamping plate is arranged on the third support frame and is also located above the third movable clamping plate. The third hydraulic cylinder drives the third movable clamping plate to move toward or away from the third fixed clamping plate.

[0016] The conveyor belt loosening method provided by the present invention has the following technical effects: This conveyor belt loosening method adopts the operation mode of upper belt clamping and lower belt pulling, and performs multi-clamping and loosening, which improves the efficiency and safety of conveyor belt clamping.

[0017] The conveyor belt relaxing device provided by the present invention has the following technical effects: The conveyor belt loosening device includes a first drive clamping mechanism and a second drive clamping mechanism. The first drive clamping mechanism is used for fixed clamping of the upper belt, and the second drive clamping mechanism is used for fixed clamping and movable clamping of the lower belt. The first drive clamping mechanism and the second drive clamping mechanism cooperate and perform multi-point clamping. The first drive clamping mechanism and the second drive clamping mechanism are used to replace the manually fixed conveyor belt clamping plate and use a manual hoist to stretch the conveyor belt, which reduces the frequency of manual operation by on-site personnel and improves the efficiency and safety of conveyor belt clamping. The device is installed at a suitable position near the head of the fixed belt conveyor. When replacing the roller or maintenance work, the clamping and belt pulling operations can be completed by one person. One operation process only takes about 10 minutes. Compared with the previous completion of the corresponding work, the time required for loosening the belt can be greatly reduced, which greatly improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of roller winding in the prior art; Figure 2 It is a front view of the first driving clamping mechanism of the conveyor belt relaxing device of the present invention; Figure 3 yes Figure 2 A side view of the first driving clamping mechanism; Figure 4 is a front view of the second driving clamping mechanism of the conveyor belt release device of the present invention; Figure 5 yes Figure 4 A front view of a fixed drive clamping mechanism of the second drive mechanism; Figure 6 yes Figure 4 A front view of the mobile drive clamping mechanism of the second drive mechanism.

[0020] in, Figure 1-Figure 6 : 100, first driving clamping mechanism; 11, first supporting frame; 111, upper frame; 112, lower frame; 113, supporting rod; 12, first hydraulic cylinder; 13, first movable clamping plate; 14, first fixed clamping plate; 200, second drive clamping mechanism; 21, mobile drive clamping mechanism; 211, second support frame; 212, second hydraulic cylinder; 213, second mobile clamping plate; 214, second fixed clamping plate; 22, fixed drive clamping mechanism; 221, third support frame; 222, third hydraulic cylinder; 223, third mobile clamping plate; 224, third fixed clamping plate; 225, tilting column; 23, column; 24, slide rail; 25, push hydraulic cylinder; 251, second lug; 252, third lug. DETAILED DESCRIPTION

[0021] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0022] Based on the defects in the prior art, the following Figure 2-6 The conveyor belt unwinding device of the present invention is described in detail.

[0023] like Figure 2-6As shown, the conveyor belt relaxing device includes a first driving clamping mechanism 100 and a second driving clamping mechanism 200. The first driving clamping mechanism 100 is used for fixed clamping of the upper belt, and the second driving clamping mechanism 200 is used for fixed clamping and movable clamping of the lower belt.

[0024] The detailed structures of the first driving and clamping mechanism 100 and the second driving and clamping mechanism 200 are described below.

[0025] like Figure 2 and Figure 3 As shown, it is a structural schematic diagram of the first driving clamping mechanism 100, and the first driving clamping mechanism 100 includes a first supporting frame 11, a first hydraulic cylinder 12, a first movable clamping plate 13 and a first fixed clamping plate 14. The first hydraulic cylinder 12 is arranged on the first supporting frame 11, and the telescopic end of the first hydraulic cylinder 12 is provided with a first movable clamping plate 13. The first fixed clamping plate 14 is arranged on the first supporting frame 11 and is also located below the first movable clamping plate 13. The first hydraulic cylinder 12 drives the first movable clamping plate 13 to move toward or away from the first fixed clamping plate 14.

[0026] The first fixed clamping plate 14 and the first movable clamping plate 13 are both arranged at an incline.

[0027] The first support frame 11 includes a bottom frame and an upper frame 111. The upper frame 111 is inclined relative to the bottom frame, and a support rod 113 is provided between the upper frame 111 and the bottom frame. The first hydraulic cylinder 12 is installed on the upper frame 111, and the first movable clamping plate 13 is installed on the telescopic end of the first hydraulic cylinder 12. The first fixed clamping plate 14 is fixedly installed on the lower frame 112. The first hydraulic cylinder 12 drives the first movable clamping plate 13 to move toward or away from the first fixed clamping plate 14. When the first hydraulic cylinder 12 drives the first movable clamping plate 13 to move toward the first fixed clamping plate 14, it is used to clamp the upper belt (that is, the load-bearing belt).

[0028] like Figure 4 As shown, the second driving clamping mechanism 200 includes a mobile driving clamping mechanism 21, a fixed driving clamping mechanism 22, a pushing hydraulic cylinder 25 and a slide rail 24. The fixed driving clamping mechanism 22 is fixedly arranged on one side of the slide rail 24, and the mobile driving clamping mechanism 21 is slidably arranged on the slide rail 24 and is connected to the fixed driving clamping mechanism 22 through the pushing hydraulic cylinder 25.

[0029] The slide rail 24 of this embodiment is arranged horizontally, and a column 23 is fixedly installed at one end, and a fixed drive clamping mechanism 22 is fixedly installed at the other end, that is, the horizontally installed slide rail 24 is located between the column 23 and the fixed drive clamping mechanism 22, and the mobile drive clamping mechanism 21 is slidably installed on the horizontal slide rail 24. There is a push hydraulic cylinder 25 between the mobile drive clamping mechanism 21 and the fixed drive clamping mechanism 22, that is, the mobile drive clamping mechanism 21 is driven by the push hydraulic cylinder 25 to slide on the horizontal slide rail 24. During the sliding process of the mobile drive clamping mechanism 21, the lower belt (that is, the return belt) is clamped and the lower belt is driven to move, thereby completing the purpose of loosening the conveyor belt.

[0030] Detailed, such as Figure 5 As shown, the fixed drive clamping mechanism 22 of this embodiment includes a third support frame 221, a third hydraulic cylinder 222, a third movable clamping plate 223 and a third fixed clamping plate 224. The third hydraulic cylinder 222 is arranged on the third support frame 221, and the telescopic end of the third hydraulic cylinder 222 is provided with a third movable clamping plate 223. The third fixed clamping plate 224 is arranged on the third support frame 221 and is also located above the third movable clamping plate 223. The third hydraulic cylinder 222 drives the third movable clamping plate 223 to move toward or away from the third fixed clamping plate 224.

[0031] In addition, the fixed drive clamping mechanism 22 further includes an inclined column 225 , which is installed on the third support frame 221 to enhance the stability of the third support frame 221 .

[0032] The fixed drive clamping mechanism 22 of this embodiment is used to clamp the loosened conveyor belt to prevent the loosened conveyor belt from sliding away in the upper belt direction.

[0033] Detailed, such as Figure 6 As shown, the mobile drive clamping mechanism 21 of this embodiment includes a second support frame 211, a second hydraulic cylinder 212, a second mobile clamping plate 213 and a second fixed clamping plate 214. The second hydraulic cylinder 212 is arranged on the second support frame 211, and the telescopic end of the second hydraulic cylinder 212 is provided with a second mobile clamping plate 213. The second fixed clamping plate 214 is arranged on the second support frame 211 and is also located below the second mobile clamping plate 213. The second hydraulic cylinder 212 drives the second mobile clamping plate 213 to move toward or away from the second fixed clamping plate 214.

[0034] The movable driving clamping mechanism 21 of this embodiment is used to clamp the conveyor belt and loosen the conveyor belt.

[0035] In addition, the second support frame 211 has a second lug 251, and the third support frame 221 has a third lug 252. The push hydraulic cylinder 25 is installed on the second lug 251 and the third lug 252, thereby realizing the installation of the push hydraulic cylinder 25 between the mobile drive clamping mechanism 21 and the fixed drive clamping mechanism 22.

[0036] The first driving clamping mechanism 100 and the second driving clamping mechanism 200 of this embodiment adopt two independent hydraulic systems.

[0037] The following is a detailed description of the conveyor belt relaxation method.

[0038] This embodiment provides a conveyor belt loosening method, comprising the following steps: Step S1: fix the upper conveyor belt with an upper belt fixing clamping point; Step S2: Move the clamping point to clamp the lower conveyor belt, and draw the lower conveyor belt from the tensioning position at the tail of the machine to the roller at the head of the machine to loosen the roller conveyor belt; Step S3: The lower belt fixed clamping point is clamped again, and the movable clamping point is released; Step S4: After the movable clamping point is retracted into position, the conveyor belt is clamped again, the lower belt fixed clamping point is released, and then the roller conveyor belt is loosened.

[0039] As a preferred embodiment, since one push may not necessarily satisfy the conveyor belt slack margin for replacing the roller, steps S1 to S4 may be repeated multiple times according to the on-site working conditions and the movement stroke of the push hydraulic cylinder 25 .

[0040] As a preferred embodiment, the upper belt fixed clamping point adopts a first driving clamping mechanism 100, and the movable clamping point and the lower belt fixed clamping point adopt a second driving clamping mechanism 200.

[0041] In detail, a fixed clamping point is set on the upper belt of the machine head (i.e., the upper belt fixed clamping point), a movable clamping point is set on the conveyor belt bypassing the driving part, and in conjunction with the push hydraulic cylinder 25, another fixed clamping point is set far away from the lower belt (i.e., the lower belt fixed clamping point).

[0042] During operation, the upper belt of the conveyor belt is clamped by the first driving clamping mechanism 100 to prevent the loosened conveyor belt from sliding down due to gravity, the clamping point is moved to clamp the lower belt of the conveyor belt, the push hydraulic cylinder 25 is extended, and the lower belt of the conveyor belt is directly pulled out from the tensioning point at the tail of the machine to the roller at the head of the machine, the fixed clamping point of the lower belt is clamped again, the clamping point is moved to release it, and after the push hydraulic cylinder 25 is retracted into place, the clamping point is moved to clamp the belt again, the fixed clamping point of the lower belt is released, and the push hydraulic cylinder 25 is extended to loosen the belt at the roller again.

[0043] The hydraulic system of the relaxation method is divided into four circuits: an upper belt clamping circuit, two return belt clamping circuits (fixed clamping and movable clamping) and a pushing circuit for loosening the belt. Specifically, in order to drive the conveyor belt to be pulled, the conveyor belt bearing section must be clamped and fixed to prevent the relaxed conveyor belt from sliding under the upper belt due to tension after the lower belt is pulled. The return belt has a fixed clamping point and a movable clamping point. A pushing hydraulic cylinder 25 is arranged on the movable clamping point. After the fixed clamping point of the upper belt (bearing belt) is clamped, the fixed clamping belt of the lower belt (return belt) is loosened, and the movable clamping point clamps the conveyor belt. The pushing hydraulic cylinder 25 pushes the movable clamping point to pull the conveyor belt.

[0044] In order to meet the requirements of on-site roller replacement, the hydraulic system of the device has two independent hydraulic systems, one of which controls the clamping work of the upper belt surface. According to the on-site working conditions, the system adopts the local control mode to realize the automatic clamping work of the upper belt surface and communicate the working status to the host computer. The two sets of clamping cylinders and the push hydraulic cylinder 25 of the lower belt share a hydraulic system, which realizes the loosening process of the conveyor belt at the roller by stepping the belt pumping work of the clamping and loosening of the lower conveyor belt.

[0045] In the description of the present invention, it should be noted that, unless otherwise specified, "multiple" means two or more than two; the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0047] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A conveyor belt loosening method, characterized in that: The following steps are involved: Step S1: fix the upper conveyor belt with an upper belt fixing clamping point; Step S2: Move the clamping point to clamp the lower conveyor belt, and draw the lower conveyor belt from the tensioning position at the tail of the machine to the roller at the head of the machine to loosen the roller conveyor belt; Step S3: The lower belt fixed clamping point is clamped again, and the movable clamping point is released; Step S4: After the movable clamping point is retracted into position, the conveyor belt is clamped again, the lower belt fixed clamping point is released, and then the roller conveyor belt is loosened.

2. The conveyor belt loosening method according to claim 1, characterized in that: Repeat steps S1 to S4 multiple times.

3. The conveyor belt loosening method according to claim 1, characterized in that: The upper belt fixed clamping point adopts a first driving clamping mechanism, and the movable clamping point and the lower belt fixed clamping point adopt a second driving clamping mechanism.

4. The conveyor belt loosening method according to claim 3, characterized in that: The first driving clamping mechanism and the second driving clamping mechanism are both provided with oil cylinders, and the first driving clamping mechanism and the second driving clamping mechanism adopt two independent hydraulic systems.

5. A conveyor belt relaxing device used in the conveyor belt relaxing method according to any one of claims 1 to 4, characterized in that: The conveyor belt relaxing device comprises a first driving clamping mechanism and a second driving clamping mechanism, wherein the first driving clamping mechanism is used for fixed clamping of the upper belt, and the second driving clamping mechanism is used for fixed clamping and movable clamping of the lower belt.

6. The conveyor belt relaxing device according to claim 5, characterized in that: The first driving clamping mechanism includes a first supporting frame, a first hydraulic cylinder, a first movable clamping plate and a first fixed clamping plate. The first hydraulic cylinder is arranged on the first supporting frame, and the telescopic end of the first hydraulic cylinder is provided with the first movable clamping plate. The first fixed clamping plate is arranged on the first supporting frame and is also located below the first movable clamping plate. The first hydraulic cylinder drives the first movable clamping plate to move toward or away from the first fixed clamping plate.

7. The conveyor belt relaxing device according to claim 6, characterized in that: The first fixed clamping plate and the first movable clamping plate are both arranged obliquely.

8. The conveyor belt unwinding device according to claim 5, characterized in that: The second driving clamping mechanism includes a mobile driving clamping mechanism, a fixed driving clamping mechanism, a push hydraulic cylinder and a slide rail. The fixed driving clamping mechanism is fixedly arranged on one side of the slide rail. The mobile driving clamping mechanism can be slidably arranged on the slide rail and is connected to the fixed driving clamping mechanism through the push hydraulic cylinder.

9. The conveyor belt relaxing device according to claim 8, characterized in that: The mobile drive clamping mechanism includes a second support frame, a second hydraulic cylinder, a second mobile clamping plate and a second fixed clamping plate. The second hydraulic cylinder is arranged on the second support frame, and the telescopic end of the second hydraulic cylinder is provided with the second mobile clamping plate. The second fixed clamping plate is arranged on the second support frame and is also located below the second mobile clamping plate. The second hydraulic cylinder drives the second mobile clamping plate to move toward or away from the second fixed clamping plate.

10. The conveyor belt unwinding device according to claim 8, characterized in that: The fixed drive clamping mechanism includes a third support frame, a third hydraulic cylinder, a third movable clamping plate and a third fixed clamping plate. The third hydraulic cylinder is arranged on the third support frame, and the telescopic end of the third hydraulic cylinder is provided with the third movable clamping plate. The third fixed clamping plate is arranged on the third support frame and is also located above the third movable clamping plate. The third hydraulic cylinder drives the third movable clamping plate to move toward or away from the third fixed clamping plate.

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