Anti-reversion roller of belt conveyor

Abstract

The invention belongs to the technical field of backstops, and particularly relates to an anti-reversion roller of a belt conveyor, which comprises a roller, a connecting shaft, a first backstop and a second backstop, and the roller is fixedly connected with the connecting shaft; the first backstop is in linkage with the second backstop through the linkage assembly, after the backstop belt moves towards the roller, the limiting assembly relieves limiting, the guide cover moves, and the outer surface of the limiting column makes contact with the inner ring wall of the fixing base. By arranging the first backstop and the second backstop and achieving linkage, the graded braking effect is achieved. In the initial stage of slight reversion, the first backstop firstly acts, and a backstop belt is utilized to intervene in a gap between the roller and the conveying belt to generate friction resistance; when the reversion trend is aggravated and the first backstop cannot stop independently, the second backstop is triggered, and stronger braking force is provided through mechanical clamping stagnation of the limiting column and the fixing base.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of backstop, and particularly relates to a reverse-preventing roller of a belt conveyor. BACKGROUND

[0002] As a common continuous conveying equipment, the belt conveyor is widely used in the mining, port, power and chemical industries, and is used for conveying bulk materials. During its operation, especially when conveying materials upwardly, the belt conveyor and the materials carried thereby may slide reversely or reverse due to power interruption, overload or brake failure under the action of gravity.

[0003] In order to prevent such reverse accidents, a backstop device is usually arranged at the driving device or the driven roller. Common backstop devices include roller backstop, special-shaped block backstop and ratchet pawl mechanism. Although these conventional devices can prevent reverse to a certain extent, they have some inherent defects. For example, the reverse elements (such as rollers or wedge blocks) of the roller backstop or similar structure backstop are in a non-working state in theory during normal forward operation of the equipment, but they may have slight contact with the running parts or be in a standby critical state, which will generate continuous running resistance, increase additional energy consumption, cause wear between the reverse elements and the cooperating parts, shorten the service life, and usually require a dedicated lubrication system for maintenance, which is complex in structure and high in maintenance cost. On the other hand, some backstop structures based on friction resistance can provide braking during reverse, but the braking elements may also have a large area of contact with the belt during forward operation of the equipment, generating unnecessary friction resistance and wear, affecting the conveying efficiency and reducing the service life of the belt. Therefore, there is an urgent need for a reverse-preventing device that can reduce running resistance and wear as much as possible during forward operation of the equipment, and can provide rapid and reliable staged braking protection during reverse. SUMMARY

[0004] In view of the above technical problems, the present application provides a reverse-preventing roller of a belt conveyor, which aims to solve the problems of large resistance and fast wear during normal forward operation of the existing backstop device of the belt conveyor, and the problems of untimely braking or insufficient braking force during reverse.

[0005] In order to solve the above technical problems, the technical scheme adopted by the present application is as follows: A reverse-preventing roller of a belt conveyor, comprising a roller, a connecting shaft, a first backstop and a second backstop, wherein the roller is fixedly connected with the connecting shaft; The first backstop comprises a fixed frame, a driving belt and a backstop belt, one end of the driving belt is fixedly connected with the fixed frame, and a baffle matched with the driving belt is arranged on the fixed frame; the backstop belt is slidably connected with the fixed frame, and a protrusion is arranged on the backstop belt; when the roller reverses, the protrusion is pushed by the driving belt to move the backstop belt towards the roller. The second backstop comprises a fixed seat, a limiting wheel and a guide cover; the limiting wheel is arranged in the fixed seat, a connecting shaft passes through the fixed seat and is connected with the limiting wheel; a plurality of limiting inclined grooves are arranged on the limiting wheel, and a limiting column is arranged in each limiting inclined groove; the guide cover is slidably connected with the fixed seat, and a spring assembly is arranged at the sliding connection position; a limiting assembly is arranged between the guide cover and the fixed seat; the end of the limiting column is fixedly connected with a ball head, and a guide inclined groove matched with the ball head is arranged in the guide cover. The first backstop is connected with the second backstop through a linkage assembly, when the backstop belt moves towards the roller, the linkage assembly controls the limiting assembly to release the limiting, the guide cover moves, and the outer surface of the limiting column is in contact with the inner annular wall of the fixed seat.

[0006] The end of the driving belt is fixedly connected with a push plate, and the protrusion is pushed by the push plate.

[0007] A sliding groove is arranged on the fixed frame, and a guide rod slidably connected with the sliding groove is arranged on the backstop belt.

[0008] The limiting assembly comprises a connecting plate and a limiting plate, the connecting plate is slidably connected with the fixed seat, and a limiting spring is arranged between the connecting plate and the fixed seat; the limiting plate is fixedly connected with the connecting plate, and a clamping groove matched with the limiting plate is arranged on the guide cover. A sliding plate is slidably connected with the fixed seat, and a bolt is arranged between the sliding plate and the fixed seat; the sliding plate is in contact with the connecting plate to limit the downward movement of the connecting plate; the contact surface between the sliding plate and the connecting plate is an inclined surface.

[0009] The linkage assembly comprises a linkage rod and a support column, the support column is fixedly connected with the fixed frame and the fixed seat, the linkage rod is slidably connected with the support column, the bolt is fixedly connected with the linkage rod, and the linkage rod is pushed to move by the guide rod.

[0010] The end of the guide rod is spaced apart from the end of the linkage rod; after the guide rod moves a distance, the end of the guide rod is in contact with the end of the linkage rod and pushes the linkage rod to move.

[0011] A guide pin is fixedly connected with the fixed frame, and an arc-shaped open slot matched with the guide pin is arranged on the backstop belt; a graphite bushing is arranged in the guide inclined groove.

[0012] The spring assembly comprises a guide rod and a support spring, the guide rod is fixedly connected with the guide cover, the fixed seat is slidably connected with the guide rod, and the support spring is sleeved outside the guide rod.

[0013] The fixed seat is rotationally connected with a side plate, and the side plate is provided with a connecting groove in sliding connection with the limiting column.

[0014] The limiting column is provided with a baffle for blocking the connecting groove.

[0015] Compared with the prior art, the present application has the beneficial effects that: By setting the first and second backstoppers and realizing linkage, the staged braking effect is realized. In the initial stage of slight reverse rotation, the first backstop acts first, and friction resistance is generated by the intervention of the backstop belt between the drum and the conveying belt; when the reverse rotation trend intensifies and the first backstop cannot stop alone, the second backstop is triggered, and stronger braking force is provided by the mechanical jamming of the limiting column and the fixed seat. When running forward, only the driving belt of the first backstop has small-area contact with the conveying belt, and the limiting column of the second backstop has a gap with the inner ring wall of the fixed seat, which significantly reduces the running resistance and wear.

[0016] The first backstop detects reverse rotation and directly triggers the second backstop through the mechanical linkage assembly (linkage rod, latch), without the need for external power or complex sensing control, which is fast in response and reliable in action, ensuring the timeliness of the reverse rotation protection.

[0017] When the second backstop runs forward, the limiting column does not contact the inner ring wall of the fixed seat, eliminating the need for special lubricating oil between the two, and only ordinary lubrication or graphite bushing is needed at the ball head and guide inclined groove to achieve self-lubrication, reducing the maintenance complexity and cost.

[0018] In the first backstop, the cooperation of the guide pin and the arc-shaped opening slot ensures that the backstop belt is lifted and supported during forward running, avoiding contact with the conveying belt; in the linkage assembly, the guide rod and the end of the linkage rod are reserved with a gap, avoiding the linkage resistance when the backstop belt moves initially, and ensuring that it can smoothly extend into the braking position.

[0019] The first backstop provides preliminary friction braking, and the second backstop provides ultimate mechanical locking, and the two work together to form double reverse rotation protection, greatly improving the safety and reliability of the belt conveyor operation. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 is a schematic diagram of the overall structure after removing the drum and the belt; Figure 3 is Figure 2 is another direction of the structure of the structure shown in the figure; Figure 4 is a partial sectional view of the second backstop; Figure 5is a structural schematic view of part of components in the second backstop; Figure 6 is Figure 1 is a longitudinal sectional view of the structure shown; Figure 7 is Figure 6 is a partial enlarged view at A in the structure shown; Figure 8 is Figure 1 is a transverse sectional view of the structure shown; Figure 9 is Figure 8 is a partial enlarged view at B in the structure shown; Figure 10 is a partial sectional view of the second backstop containing a baffle; Wherein: 1 is a roller, 2 is a connecting shaft, 3 is a first backstop, 30 is a fixed frame, 31 is a driving belt, 32 is a backstop belt, 33 is a baffle, 34 is a protrusion, 35 is a push plate, 36 is a sliding groove, 37 is a guide rod, 38 is a guide pin, 39 is an arc-shaped open slot, 4 is a second backstop, 40 is a fixed seat, 400 is an inner ring wall, 41 is a limiting wheel, 42 is a guide cover, 43 is a limiting inclined slot, 44 is a limiting column, 45 is a spring assembly, 450 is a guide rod, 451 is a supporting spring, 46 is a limiting assembly, 460 is a connecting plate, 461 is a limiting plate, 462 is a limiting spring, 463 is a clamping groove, 464 is a sliding plate, 465 is a latch, 47 is a ball head, 48 is a guide inclined slot, 49 is a side plate, 410 is a connecting groove, 411 is a baffle, 412 is a graphite bushing, 413 is a contact surface, 5 is a linkage assembly, 50 is a linkage rod, 51 is a supporting column, 6 is a conveyor belt. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, not all.

[0022] As Figures 1 to 5 shown, a backstop roller of a belt conveyor includes a roller 1, a connecting shaft 2, a first backstop 3 and a second backstop 4, and the roller 1 is fixedly connected with the connecting shaft 2. The connecting shaft 2 is connected with a rack (bearing seat) of the belt conveyor.

[0023] The first backstop 3 includes a fixed frame 30, a driving belt 31 and a backstop belt 32, and the fixed frame 30 is fixed on the rack of the belt conveyor; specifically, the fixed frame 30 is connected by bolts, and corresponding connecting holes are arranged on the fixed frame 30.

[0024] One end of the driving belt 31 is fixedly connected with the fixed frame 30, the fixed frame 30 is provided with a baffle 33 matched with the driving belt 31, and the driving belt 31 is in contact with the conveying belt 6 of the belt conveyor. When the roller 1 rotates clockwise (forward), under the traction (by friction) of the conveying belt 6 of the belt conveyor, the driving belt 31 is driven to move and contact the baffle 33, and the movement of the driving belt 31 is limited by the baffle 33.

[0025] The reverse belt 32 is slidably connected with the fixed frame 30, and the reverse belt 32 is provided with a protrusion 34. When the roller 1 rotates counterclockwise (reverse), under the traction (by friction) of the conveying belt 6 of the belt conveyor, the driving belt 31 moves reversely, the protrusion 34 is pushed by the driving belt 31 to drive the reverse belt 32 to move towards the roller 1, and the reverse belt 32 extends into the roller 1 and the conveying belt 6, thereby preventing the reverse rotation of the roller 1.

[0026] Through the above structure, when the roller 1 rotates forward, only the driving belt 31 contacts the conveying belt 6, the contact part is small, and the operation of the conveying belt 6 can be reduced. The resistance or wear of the conveying belt 6 can be reduced; when the roller 1 rotates reversely, the resistance can be increased in time through the reverse belt 32 to prevent the reverse rotation of the roller 1.

[0027] The second reverse device 4 includes a fixed seat 40, a limiting wheel 41 and a guide cover 42; the limiting wheel 41 is arranged in the fixed seat 40, the connecting shaft 2 passes through the fixed seat 40 and is connected (key connection) with the limiting wheel 41; when the connecting shaft 2 rotates, the limiting wheel 41 rotates together.

[0028] The limiting wheel 41 is provided with a plurality of limiting inclined grooves 43, and the limiting inclined grooves 43 are provided with limiting columns 44; the guide cover 42 is slidably connected with the fixed seat 40, and a spring assembly 45 is arranged at the sliding connection; the guide cover 42 and the fixed seat 40 are provided with a limiting assembly 46. When the limiting assembly 46 is in the limiting state, the elastic element in the spring assembly 45 has elastic potential energy; when the limiting assembly 46 is unlocked, the elastic element in the spring assembly 45 releases the elastic potential energy, so that the guide cover 42 moves.

[0029] The end of the limiting column 44 is fixedly connected with a ball head 47, and the guide cover 42 is provided with a guide inclined groove 48 matched with the ball head 47, and the guide inclined groove 48 is in a ring structure; when the guide cover 42 moves, the contact part of the ball head 47 with the guide inclined groove 48 changes, and then the position of the limiting column 44 changes. When the roller 1 rotates forward, there is a gap between the limiting column 44 and the inner ring wall 400 of the fixed seat 40, and the limiting column 44 is located at the wide part of the limiting inclined groove 43, so as not to hinder the rotation of the connecting shaft 2 and the limiting wheel 41. Moreover, since the limiting column 44 does not contact the inner ring wall 400 of the fixed seat 40 during forward rotation, compared with the common ball type backstop, the special lubricating oil between the limiting column 44 and the fixed seat 40 can be saved. Only ordinary lubricating oil needs to be added at the ball head 47 and the guide inclined groove 48.

[0030] The first backstop 3 is linked with the second backstop 4 through the linkage assembly 5, when the backstop belt 32 moves towards the roller 1 (i.e. the roller 1 rotates reversely), the limiting assembly 46 is released from limiting through the linkage assembly 5, the elastic element in the spring assembly 45 releases the elastic potential energy, the guide cover 42 moves away from the fixed seat 40, the contact part (from inside to outside) of the ball head 47 with the guide inclined groove 48 changes, and the limiting column 44 moves towards the inner ring wall 400.

[0031] When the resistance applied by the backstop belt 32 is not enough to make the roller 1 and the connecting shaft 2 stop; since the contact part of the ball head 47 with the guide inclined groove 48 changes, the outer surface of the limiting column 44 contacts the inner ring wall 400 of the fixed seat 40, so at this time the rotation of the connecting shaft 2 will make the limiting wheel 41 rotate reversely (the limiting column 44 will be located at the narrow part of the limiting inclined groove 43), and since the outer surface of the limiting column 44 contacts the inner ring wall 400 of the fixed seat 40; therefore, the limiting column 44 will be clamped between the limiting wheel 41 and the inner ring wall 400 of the fixed seat 40, and then prevent the limiting wheel 41, the connecting shaft 2 and the roller 1 from rotating reversely.

[0032] Through the linkage structure of the first backstop 3 and the second backstop 4, when the first backstop 3 cannot completely prevent the roller 1 from rotating reversely, the second backstop 4 can increase the resistance to further prevent the roller 1 from rotating reversely.

[0033] Further, as shown in Figure 8 and Figure 9 In order to better push the backstop belt 32, the end of the driving belt 31 is fixedly connected with a push plate 35, and the push plate 35 pushes the protrusion 34.

[0034] Further, as shown in Figure 2As shown, the sliding connection between the reverse belt 32 and the fixed frame 30 can be achieved in various structures; specifically, a sliding groove 36 is arranged on the fixed frame 30, and a guide rod 37 fixed on the reverse belt 32 is in sliding connection with the sliding groove 36. When the reverse belt 32 moves, the guide rod 37 will also move correspondingly.

[0035] Further, as shown in the figure, Figures 2 to 7 The limiting component 46 includes a connecting plate 460 and a limiting plate 461, the connecting plate 460 is in sliding connection with the fixed seat 40, and a limiting spring 462 is arranged between the connecting plate 460 and the fixed seat 40; the limiting plate 461 is fixedly connected with the connecting plate 460, and the guide cover 42 is provided with a clamping groove 463 matched with the limiting plate 461.

[0036] The fixed seat 40 is slidingly connected with a sliding plate 464, and a bolt 465 is arranged between the sliding plate 464 and the fixed seat 40, and the sliding plate 464 and the fixed seat 40 are provided with corresponding bolt seats. The contact surface 413 between the sliding plate 464 and the connecting plate 460 is a slope.

[0037] When the bolt 465 is inserted into the two bolt seats, the sliding plate 464 contacts the connecting plate 460 and limits the movement of the connecting plate 460, at this time, the limiting spring 462 is in a pre-compressed state, and the limiting plate 461 is inserted into the clamping groove 463. When the bolt 465 is not inserted into the two bolt seats, the limiting spring 462 releases the elastic potential energy, and through the cooperation of the slope, the connecting plate 460 generates a pushing force on the sliding plate 464, so that the sliding plate 464 moves away from the lower side of the connecting plate 460 and no longer blocks the movement of the connecting plate 460; at this time, the connecting plate 460 and the limiting plate 461 will move downward, so that the limiting plate 461 moves out of the clamping groove 463; the elastic element in the spring component 45 releases the elastic potential energy, so that the guide cover 42 moves away from the fixed seat 40.

[0038] Further, as shown in the figure, Figures 1 to 3 The linkage component 5 includes a linkage rod 50 and a support column 51, the fixed frame 30 and the fixed seat 40 are both fixedly connected with the support column 51, the linkage rod 50 is in sliding connection with the support column 51, and the bolt 465 is fixedly connected with the linkage rod 50. When the reverse belt 32 and the guide rod 37 move, the linkage rod 50 and the bolt 465 are pushed to move by the guide rod 37, so that the bolt 465 is separated from the two bolt seats (not in the inserted state).

[0039] Further, as shown in the figure, Figure 2 The end of the guide rod 37 is spaced from the end of the linkage rod 50; after the guide rod 37 moves a distance, the end of the guide rod 37 contacts the end of the linkage rod 50 and pushes the linkage rod 50 to move. With this structure, when the reverse belt 32 starts to move, the resistance of the linkage component 5 and the limiting component 46 can be avoided.

[0040] Further, asFigure 8 And Figure 9 As shown in the figure, the fixed frame 30 is fixedly connected with a guide pin 38, and the reverse belt 32 is provided with an arc-shaped open slot 39 connected with the guide pin 38. Through the cooperation of the guide pin 38 and the arc-shaped open slot 39, the reverse belt 32 can be supported; when the roller 1 rotates forward, the reverse belt 32 is prevented from contacting the conveying belt 6. When the reverse belt 32 moves, the guide pin 38 will fall off from the arc-shaped open slot 39, and the reverse belt 32 will fall under the gravity and contact the conveying belt 6.

[0041] Further, as shown in the figure, Figure 4 And Figure 7 In order to reduce the resistance, a graphite bushing 412 is arranged in the guide inclined slot 48. After the graphite bushing 412 is used, the guide inclined slot 48 and the ball head 47 do not need to be added with lubricating oil.

[0042] Further, as shown in the figure, Figure 2 And Figure 4 The spring assembly 45 includes a guide rod 450 and a supporting spring 451 (elastic member). The guide rod 450 is fixedly connected with the guide cover 42, the fixed seat 40 is slidingly connected with the guide rod 450, the supporting spring 451 is sleeved outside the guide rod 450, and the two ends of the supporting spring 451 are respectively abutted with the guide cover 42 and the fixed seat 40.

[0043] Further, as shown in the figure, Figure 4 And Figure 10 The side plate 49 is rotatably connected to one side of the fixed seat 40 close to the guide cover 42, and the connecting slot 410 slidingly connected with the limiting column 44 is arranged on the side plate 49. The limiting column 44 is supported through the side plate 49. The limiting column 44 is provided with a baffle 411, and the connecting slot 410 is blocked by the baffle 411. The limiting column 44 is fixedly connected with the ball head 47 through the connecting slot 410.

[0044] Of course, the other side of the fixed seat 40 can also be provided with the side plate 49. The above guide cover 42 can be provided with two, which are respectively located on the two sides of the fixed seat 40. The other components connected with the guide cover 42 are also provided with two. That is, the two sides of the limiting column 44 are constrained by the guide cover 42 and the side plate 49.

[0045] The above only describes the preferred embodiment of the application in detail, but the application is not limited to the above embodiment.

Claims

1. An anti-reverse roller for a belt conveyor, characterized in that: It includes a roller (1), a connecting shaft (2), a first backstop (3) and a second backstop (4), wherein the roller (1) is fixedly connected to the connecting shaft (2); The first backstop (3) includes a fixed frame (30), a drive belt (31) and a backstop belt (32). One end of the drive belt (31) is fixedly connected to the fixed frame (30). The fixed frame (30) is provided with a baffle (33) that cooperates with the drive belt (31). The backstop belt (32) is slidably connected to the fixed frame (30). The backstop belt (32) is provided with a protrusion (34). When the roller (1) reverses, the drive belt (31) pushes the protrusion (34) to make the backstop belt (32) move toward the roller (1). The second backstop (4) includes a fixed base (40), a limiting wheel (41), and a guide cover (42); the limiting wheel (41) is disposed inside the fixed base (40), and the connecting shaft (2) passes through the fixed base (40) and is connected to the limiting wheel (41); the limiting wheel (41) is provided with a plurality of limiting grooves (43), and each limiting groove (43) is provided with a limiting post (44); the guide cover (42) is slidably connected to the fixed base (40), and a spring assembly (45) is provided at the sliding connection; a limiting assembly (46) is provided between the guide cover (42) and the fixed base (40); a ball head (47) is fixedly connected to the end of the limiting post (44), and a guide groove (48) that cooperates with the ball head (47) is provided inside the guide cover (42); The first backstop (3) is connected to the second backstop (4) through the linkage assembly (5). When the backstop belt (32) moves toward the roller (1), the linkage assembly (5) controls the limit assembly (46) to release the limit, and the guide cover (42) moves, so that the outer surface of the limit post (44) contacts the inner ring wall (400) of the fixed seat (40).

2. The anti-reverse roller of a belt conveyor according to claim 1, characterized in that: The end of the drive belt (31) is fixedly connected to a push plate (35), which pushes the protrusion (34).

3. The anti-reverse roller of a belt conveyor according to claim 1, characterized in that: The fixed frame (30) is provided with a sliding groove (36), and the anti-reverse belt (32) is provided with a guide rod (37) that is slidably connected to the sliding groove (36).

4. The anti-reverse roller of a belt conveyor according to claim 3, characterized in that: The limiting component (46) includes a connecting plate (460) and a limiting plate (461). The connecting plate (460) is slidably connected to the fixed base (40), and a limiting spring (462) is provided between the connecting plate (460) and the fixed base (40). The limiting plate (461) is fixedly connected to the connecting plate (460), and the guide cover (42) is provided with a slot (463) that cooperates with the limiting plate (461). A sliding plate (464) is slidably connected to the fixed base (40), and a pin (465) is provided between the sliding plate (464) and the fixed base (40); the sliding plate (464) contacts the connecting plate (460) to restrict the connecting plate (460) from moving downward; the contact surface (413) between the sliding plate (464) and the connecting plate (460) is an inclined surface.

5. The anti-reverse roller of a belt conveyor according to claim 4, characterized in that: The linkage component (5) includes a linkage rod (50) and a support column (51). The support column (51) is fixedly connected to both the fixed frame (30) and the fixed seat (40). The linkage rod (50) is slidably connected to the support column (51). The pin (465) is fixedly connected to the linkage rod (50). The linkage rod (50) is pushed to move by the guide rod (37).

6. The anti-reverse roller of a belt conveyor according to claim 5, characterized in that: There is a gap between the ends of the guide rod (37) and the linkage rod (50); after the guide rod (37) moves a certain distance, it contacts the end of the linkage rod (50) and pushes the linkage rod (50) to move.

7. The anti-reverse roller of a belt conveyor according to claim 1, characterized in that: The fixed frame (30) is fixedly connected to a guide pin (38), and the anti-reverse belt (32) is provided with an arc-shaped opening groove (39) connected to the guide pin (38); the guide groove (48) is provided with a graphite bushing (412).

8. The anti-reverse roller of a belt conveyor according to claim 1, characterized in that: The spring assembly (45) includes a guide rod (450) and a support spring (451). The guide rod (450) is fixedly connected to the guide cover (42), the fixed seat (40) is slidably connected to the guide rod (450), and the support spring (451) is sleeved on the outside of the guide rod (450).

9. The anti-reverse roller of a belt conveyor according to claim 1, characterized in that: A side plate (49) is rotatably connected to the fixed base (40), and a connecting groove (410) is provided on the side plate (49) that is slidably connected to the limiting post (44).

10. The anti-reverse roller of a belt conveyor according to claim 9, characterized in that: The limiting post (44) is provided with a baffle (411) to block the connecting groove (410).

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