A kind of rotatable belt conveyor upper roller support fixing device, belt conveyor and belt upper roller replacement method

Abstract

The application discloses a rotatable belt conveyor upper supporting roller support fixing device, a belt conveyor and a belt upper supporting roller replacement method, and belongs to the technical field of material conveying equipment. The upper supporting roller support fixing base is increased, the upper supporting roller support is rotated downwards around the fixing pin shaft between two belt supports, the height of the supporting roller is lowered by a certain height to be separated from the belt, and the replacement space is released. The rotating pin shaft is limited by the rotating pin shaft movable long hole, the rotating and lowering height of the supporting roller support is fixed, and a special post staff is not needed to control the supporting roller support during the replacement of the supporting roller, the work load of the replacement of the supporting roller is further reduced, the safety of the staff in the replacement process is ensured, and the supporting roller is easily replaced. Meanwhile, the trouble of disassembling and assembling the material blocking sealing structure when the upper supporting roller is replaced in the tail material falling section of the belt machine is avoided.

Description

Technical Field

[0001] This invention belongs to the technical field of material conveying equipment, specifically relating to a rotatable belt conveyor idler bracket fixing device, a belt conveyor, and a method for replacing idlers on the belt. Background Technology

[0002] Idler brackets and idlers are essential components of belt conveyors. Their primary function is to support the conveyor belt and the weight of the material. Idlers are typically mounted on idler brackets via slots. The brackets are perpendicular to the conveyor belt's running direction and secured to the conveyor's steel frame with four bolts, providing support and guidance for the stable operation of the conveyor belt. On belt conveyors with a belt width of 1.2 meters, the spacing between brackets is approximately 1.2-1.5 meters, with three idlers installed per bracket group. Idler brackets and idlers are the most numerous components on a belt conveyor, requiring significant daily replacement work, accounting for 30%-40% of routine maintenance. This is a crucial task for personnel. During maintenance, to ensure stable operation of the belt conveyor, different belt tensioning devices are used to tighten the belt. The motor, through a connecting device, drives the drive drum to rotate, providing sufficient driving force to the belt and enabling normal material transport.

[0003] If the belt needs to be replaced after it has been tensioned, the tensioned belt needs to be raised 10-20 cm to remove it from the idlers and supports before personnel can carry out the replacement work. During the replacement process, the belt needs to be continuously raised, requiring significant external force, often necessitating 2-3 people using tools. If the belt falls, it can easily cause injury to the workers.

[0004] Previously, when belt idlers or supports needed replacement due to damage, it required 1-2 people to pry up the main belt with a crowbar, while another 2-3 people crawled into the narrow space under the belt to perform the replacement. This was especially difficult when replacing idlers in the middle section; replacing a small idler required 4 people working for more than 20 minutes. If the entire idler support needed to be replaced, all three idlers had to be removed, the four bolts securing the support removed, the old support moved out, the new support moved in and secured with the four bolts, and then the three idlers reinstalled. This process often required 4 people working for about 60 minutes.

[0005] In addition, to prevent material from scattering in the tail section of the conveyor belt, a tightly sealed guide chute is installed. Except for the discharge port, the other three sides are tightly fitted to the belt surface, and the dropped material is carried away from the discharge port along the belt's running direction. To ensure safe operation and a tight seal in the guide chute, the conveyor manufacturer or user uses a welded steel plate upper section, with polyurethane or rubber sealing strips fixed to the lower section using various fixing methods. Depending on the characteristics of the transported materials, the length of the conveyor belt guide chute is generally 3-8 meters, but can reach over 20 meters for chutes with multiple discharge points. For conveyors operating continuously, replacing the idlers or supports at the bottom of the guide chute is more difficult, and the extended operation time often significantly impacts production organization. Therefore, quickly replacing the idlers at the bottom of the tail section guide chute, i.e., the sealing and dustproof structure, has become a major challenge. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides a rotatable belt conveyor upper idler bracket fixing device, a belt conveyor, and a method for replacing upper idlers. By adding a fixing base for the upper idler bracket, the invention allows the upper idler bracket to rotate downwards around a fixed pin between two belt supports, lowering the idler height to a certain height and creating space for replacement. The rotating pin is restricted by its movable elongated hole, ensuring a fixed height for the idler bracket's rotation and descent. During idler replacement, no dedicated personnel are required to control the idler bracket, further reducing the workload, ensuring personnel safety during the replacement process, and enabling easy idler replacement.

[0007] The technical problem to be solved by the present invention is achieved by the following technical solution: a rotatable belt conveyor upper idler bracket fixing device, which is set on the belt bracket and connected to both ends of the upper idler bracket, with the two belt brackets spaced apart, including an upper idler bracket fixing base, a fixing pin, a rotating pin and a limiting pin; The two upper roller bracket fixing bases are respectively mounted on the two belt brackets; The upper idler roller bracket fixing base includes a vertical mounting plate disposed between two belt brackets. The vertical mounting plate is provided with a hinge hole, a rotating pin movable elongated hole, and a limiting pin holder. The rotating pin movable elongated hole is an arc-shaped track centered on the hinge hole. The two limiting pin holders are disposed at intervals on both sides of the rotating pin movable elongated hole. The limiting pin holder is provided with a connecting hole, and the limiting pin is detachably disposed in the connecting hole. The upper roller bracket is fixedly provided with a fixed pin and a rotating pin at its end. The fixed pin is rotatably disposed in the hinge hole, and the rotating pin is slidably disposed in the movable elongated hole of the rotating pin.

[0008] Preferably, a pin sleeve is provided in the hinge hole of the present invention, and the fixing pin is inserted in the pin sleeve to strengthen the rotating part of the idler roller bracket fixing base.

[0009] Preferably, an angle iron is welded to the lower part of the upper idler roller bracket, with the opening of the angle iron facing downwards. The fixed pin and the rotating pin are respectively fixedly installed at the lower ends of the angle iron. The fixed pin and the rotating pin provide overall support for the upper idler roller bracket.

[0010] Preferably, the upper idler roller bracket fixing base is detachably mounted on the belt bracket, which facilitates the replacement and installation of the upper idler roller bracket fixing base.

[0011] Preferably, the upper idler bracket has an L-shaped longitudinal section and is fixed to the upper end face of the belt bracket by bolts, so as to facilitate the disassembly and replacement of the upper idler bracket.

[0012] The present invention also discloses a method for replacing idler rollers on a belt, which utilizes the above-mentioned rotatable belt conveyor idler roller bracket fixing device, including the following steps: when the belt is working normally, the rotating pins at both ends of the idler roller bracket are located above the limit pins; When it is necessary to replace the upper idler on the belt, loosen the limit pins at both ends of the upper idler bracket, rotate the rotating pin shaft downwards along the movable elongated hole of the rotating pin shaft, and the upper idler will descend with the rotation of the upper idler bracket, and the upper idler will leave the belt, providing operating space for replacing the upper idler.

[0013] Preferably, the present invention also includes a method for replacing the upper idler bracket: removing the upper idler bracket fixing base from the belt bracket, separating the old upper idler bracket from the upper idler bracket fixing base, and replacing it with a new upper idler bracket.

[0014] The present invention also discloses a belt conveyor, including the above-mentioned rotating belt conveyor upper idler bracket fixing device, which is disposed on the belt support and connected to both ends of the upper idler bracket.

[0015] To overcome the problems of high labor intensity, time-consuming and labor-intensive nature, and significant safety risks associated with the daily replacement of upper idlers and idler supports on belt conveyors, different companies have explored various methods. Some have designed special tools for replacing belt idlers and supports, which have achieved some results, but the effect on replacement operations in the belt drop area is not obvious. This invention mainly considers an innovative modification to the fixing method of the upper idler support, which allows the upper idler support to rotate as a whole. By rotating, the support and idler can be lowered as a whole, detached from the upper belt, and the working space for replacing the upper idler and idler support can be freed up.

[0016] To address the above issues, we explored innovative ways to fix the upper idler bracket, enabling the upper idler bracket to rotate within a certain range while carrying the entire idler, allowing the entire idler bracket to descend and the idler to leave the belt.

[0017] Compared with the prior art, the beneficial effects of the present invention are: This invention features a simple structure and ingenious design. By innovatively changing the fixing method of the upper idler bracket, it allows the upper idler bracket to rotate downwards around a fixed pin, causing the idler to drop a certain height away from the belt. The rotating pin is restricted by its elongated movable hole, thus fixing the height to which the idler bracket rotates and drops. During idler replacement, no dedicated personnel are required to control the idler bracket, further reducing the workload and ensuring personnel safety during the replacement process, enabling easy idler replacement. It also avoids the hassle of disassembling and installing the material-blocking seal structure when replacing the upper idler at the tail section of the conveyor belt.

[0018] After releasing the limit pin, the device rotates directly downwards, solving the problem in existing structures where the upper idler bracket must first be raised, rotated a certain angle, and then lowered. This significantly reduces the difficulty of rotating the belt support. The use of the limit pin also makes the upper idler bracket more securely fixed, avoiding the loosening problems that may occur with the snap-fit ​​fixing in existing structures. This ensures the upper idler bracket is firmly fixed and reduces the time-consuming and labor-intensive installation and disassembly of bolted fasteners.

[0019] This device can be widely applied in the field of belt conveyors and has great application value. Attached Figure Description

[0020] Figure 1 This is a front view of the idler support fixing device on the rotatable belt conveyor of the present invention; Figure 2 This is a side view of the idler roller bracket fixing device on the rotatable belt conveyor of the present invention; Figure 3 This is a schematic diagram of the structure of the upper roller bracket fixing base in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the upper roller bracket after it has descended and rotated into position according to the present invention; Figure 5 This is a schematic diagram of the structure of the upper roller bracket fixing base in Embodiment 2 of the present invention; In the diagram, 100 is the belt support, 200 is the upper idler roller support, and 201 is the angle iron. 1. Upper roller bracket fixing base; 2. Fixing pin; 3. Rotating pin; 4. Limiting pin; 5. Pin sleeve; 11 Vertical mounting plate, 12 Hinge hole, 13 Rotary pin movable elongated hole, 14 Limit pin holder, 141 Connecting hole. Detailed Implementation

[0021] The technical solutions in the embodiments of the present invention will now be clearly and completely described in conjunction with the accompanying drawings.

[0022] Example 1 like Figures 1-4 As shown, a rotatable belt conveyor upper idler bracket fixing device is installed on the belt bracket 100 and connected to both ends of the upper idler bracket 200. The two belt brackets 100 are spaced apart and include an upper idler bracket fixing base 1, a fixing pin 2, a rotating pin 3 and a limiting pin 4.

[0023] The two upper roller bracket fixing bases 1 are respectively mounted on the two belt brackets 100.

[0024] The upper idler roller bracket fixing base 1 includes a vertical mounting plate 11 disposed between two belt brackets 100. The vertical mounting plate 11 is provided with a hinge hole 12, a rotating pin movable elongated hole 13 and a limiting pin holder 14. The rotating pin movable elongated hole 13 is an arc-shaped track centered on the hinge hole 12. The two limiting pin holders 14 are spaced apart on both sides of the rotating pin movable elongated hole 13. The limiting pin holder 14 is provided with a connecting hole 141. The limiting pin 4 is detachably disposed in the connecting hole 141.

[0025] The upper roller bracket 200 is fixedly provided with a fixed pin 2 and a rotating pin 3 at its end. The fixed pin 2 is rotatably disposed in the hinge hole 12, and the rotating pin 3 is slidably disposed in the rotating pin movable elongated hole 13.

[0026] An angle iron 201 is welded below the upper roller bracket 200. The angle iron 201 is set with its opening facing downward. The fixed pin 2 and the rotating pin 3 are respectively welded to the lower ends of the angle iron 201.

[0027] The upper roller bracket fixing base 1 is detachably mounted on the belt bracket 100.

[0028] The upper idler roller bracket 200 has an L-shaped longitudinal section and is fixed to the upper end face of the belt bracket 100 by bolts.

[0029] The rotatable belt conveyor upper idler bracket fixing device is suitable for all belt conveyor upper idler brackets, including upper-adjustable idler brackets. Using this fixing device makes it very convenient to replace belt upper idlers and brackets, effectively solving the difficulties in replacing belt conveyor upper idlers and brackets, especially for the difficult replacement of idlers at the tail end of the belt conveyor and the lower part of the guide chute, where the improvement effect is even more significant. The use of this device greatly reduces the difficulty of replacing all upper idlers and brackets on belt conveyors.

[0030] This invention innovatively adds independent upper idler bracket fixing bases, fixing pins, and rotating pins to both ends of the upper idler bracket. The fixing bases are equipped with hinge holes 12, rotating pin movable elongated holes 13, and limiting pin holders 14. One end of the fixing pin and rotating pin extends 4-5 cm beyond the upper idler bracket, while the other end overlaps the upper idler bracket by more than 15 cm. The overlapping portion of the fixing pin and rotating pin is fully welded to the lower angle iron or channel steel structure of the upper idler bracket, firmly fixing them together. The support and fixation of the belt upper idler bracket are achieved through the fixing pins and movable pins at both ends.

[0031] The upper part of the upper idler bracket fixing base is provided with the same fixing bolt holes as the original upper idler bracket; an arc-shaped rotating pin movable elongated hole is opened at the position of the rotating pin shaft corresponding to the upper idler bracket fixing base, so that the upper idler bracket can rotate freely in the rotating pin movable elongated hole with the fixing pin shafts at both ends as the center.

[0032] When replacing the idler roller on the belt, loosen the limit pins securing the upper idler roller bracket at both ends. The bracket's rotating pin will rotate downwards along the movable elongated hole of the rotating pin at a certain angle. The upper idler roller will descend as the bracket rotates, moving a distance away from the belt, allowing the operator to easily replace it. After replacement, push the upper part of the upper idler roller bracket to easily rotate it back to its original position and re-secure it with the limit pins, thus completing the upper idler roller replacement.

[0033] A method for replacing idler rollers on a belt conveyor, utilizing the aforementioned rotatable belt conveyor idler roller bracket fixing device, includes the following steps: when the belt is working normally, the rotating pins 3 at both ends of the upper idler roller bracket 200 are located above the limit pins 4.

[0034] When it is necessary to replace the upper idler on the belt, loosen the limit pins 4 at both ends of the upper idler bracket 200, and rotate the rotating pin 3 downward along the movable elongated hole 13 of the rotating pin. The upper idler will descend as the upper idler bracket 200 rotates, and the upper idler will leave the belt, providing operating space for replacing the upper idler.

[0035] See Figure 1 and Figure 4If a damaged idler roller on the conveyor belt needs replacement, transport the required model to the site in advance. Stop the conveyor belt according to the established procedure and take appropriate safety precautions to prevent abnormal restarting. Have one person stand on the belt and one on each side, using tools to remove the two limit pins. Note that after removal, the upper idler roller bracket will automatically rotate and descend. During this process, pay attention to the personnel's positioning and hand / foot placement to avoid injury. Once lowered, the idler roller will detach from the belt. Two people should work together to remove the damaged idler roller and install the new one. Finally, both people should simultaneously push up the upper parts of both ends of the upper idler roller bracket to straighten the bracket body and reinstall the limit pins at both ends. The replacement of the idler roller on the conveyor belt is now complete. The entire process is easy and simple, taking less than ten minutes.

[0036] This embodiment also includes a method for replacing the upper idler bracket: the upper idler bracket fixing base 1 is removed from the belt bracket 100, the old upper idler bracket 200 is separated from the upper idler bracket fixing base 1, and a new upper idler bracket 200 is installed.

[0037] Specifically, when replacing the upper idler bracket, the steps above are basically the same. First, remove all the upper idlers from the three upper idler brackets. Then, remove the bolts from the upper idler bracket fixing base at one end of the upper idler bracket. One bolt can be left on the upper idler bracket fixing base at the other end. By rotating around the left bolt, one end of the upper idler bracket will be completely separated from the belt bracket. Then, pull the other end of the upper idler bracket off the upper idler bracket fixing base. Insert the fixing pin and rotating pin at one end of the new upper idler bracket into the hinge hole and the movable long hole of the rotating pin in the unremoved upper idler bracket fixing base. With the help of personnel, lift the other end of the upper idler bracket and insert it into the hinge hole and the movable long hole of the rotating pin in the upper idler bracket fixing base. Secure the upper idler bracket fixing base with bolts. Install the three upper idlers into place. Finally, rotate the upper idler bracket with the idlers into place and install the limit pins at both ends. The replacement of the belt upper idler bracket is now complete.

[0038] A belt conveyor includes the rotatable belt conveyor upper idler bracket fixing device described in this embodiment. The rotatable belt conveyor upper idler bracket fixing device is disposed on the belt bracket 100 and connected to both ends of the upper idler bracket 200.

[0039] Example 2 like Figure 5 As shown, the difference from Embodiment 1 is that a pin sleeve 5 is provided inside the hinge hole 12, and the fixing pin 2 is inserted into the pin sleeve 5. The pin sleeve 5 is welded into the hinge hole 12.

Claims

1. A fixing device for an upper idler roller bracket on a rotatable belt conveyor, which is mounted on a belt bracket (100) and connected to both ends of an upper idler roller bracket (200), wherein two belt brackets (100) are spaced apart, characterized in that: It includes an upper roller bracket fixing base (1), a fixing pin (2), a rotating pin (3), and a limiting pin (4); The two upper roller bracket fixing bases (1) are respectively set on the two belt brackets (100); The upper roller bracket fixing base (1) includes a vertical mounting plate (11) disposed between two belt brackets (100). The vertical mounting plate (11) is provided with a hinge hole (12), a rotating pin movable elongated hole (13) and a limiting pin holder (14). The rotating pin movable elongated hole (13) is an arc-shaped track centered on the hinge hole (12). The two limiting pin holders (14) are disposed at intervals on both sides of the rotating pin movable elongated hole (13). The limiting pin holder (14) is provided with a connecting hole (141). The limiting pin (4) is detachably disposed in the connecting hole (141). The upper roller bracket (200) is fixedly provided with a fixed pin (2) and a rotating pin (3) at its end. The fixed pin (2) is rotatably disposed in the hinge hole (12), and the rotating pin (3) is slidably disposed in the rotating pin movable elongated hole (13).

2. The idler roller bracket fixing device for a rotatable belt conveyor as described in claim 1, characterized in that: A pin sleeve (5) is provided in the hinge hole (12), and the fixing pin (2) is inserted in the pin sleeve (5).

3. The idler roller bracket fixing device for a rotatable belt conveyor as described in claim 1, characterized in that: An angle iron (201) is welded below the upper roller bracket (200). The angle iron (201) is set with its opening facing downwards. The fixed pin (2) and the rotating pin (3) are fixedly set below both ends of the angle iron (201).

4. The idler roller bracket fixing device for a rotatable belt conveyor as described in claim 1, characterized in that: The upper roller bracket fixing base (1) is detachably mounted on the belt bracket (100).

5. The idler roller bracket fixing device for a rotatable belt conveyor as described in claim 4, characterized in that: The upper idler bracket (200) has an L-shaped longitudinal section and is fixed to the upper end face of the belt bracket (100) by bolts.

6. A method for replacing idler rollers on a belt conveyor, utilizing the idler roller bracket fixing device for a rotatable belt conveyor as described in any one of claims 1 to 5, characterized in that, Includes the following steps: belt During normal operation, the rotating pins (3) at both ends of the upper roller bracket (200) are located above the limit pins (4); When it is necessary to replace the upper idler on the belt, loosen the limit pins (4) at both ends of the upper idler bracket (200), rotate the pin shaft (3) downward along the movable elongated hole (13) of the rotating pin shaft, and the upper idler will descend with the rotation of the upper idler bracket (200), and the upper idler will leave the belt, providing operating space for replacing the upper idler.

7. The method for replacing idler rollers on a belt as described in claim 6, characterized in that, It also includes a method for replacing the upper idler bracket: remove the upper idler bracket fixing base (1) from the belt bracket (100), separate the old upper idler bracket (200) from the upper idler bracket fixing base (1), and replace it with a new upper idler bracket (200).

8. A belt conveyor, comprising the idler roller bracket fixing device for a rotatable belt conveyor as described in any one of claims 1 to 5, characterized in that, The upper idler bracket fixing device of the rotatable belt conveyor is set on the belt bracket (100) and connected to both ends of the upper idler bracket (200).

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