Bucket elevator fault detection device

Abstract

The utility model relates to the technical field of bucket elevators, in particular to a fault detection device for a bucket elevator, which comprises a synchronous rotator and a photoelectric sensor, the synchronous rotator is coaxially assembled on a driven wheel shaft of the bucket elevator, and the synchronous rotator comprises a mounting part and at least one reflecting part extending along the radial direction of the driven wheel shaft; and the reflecting part is used for reflecting the light emitted by the photoelectric sensor. The detection device provided by the utility model can detect whether equipment operates normally, and can give an alarm or perform shutdown processing in time in case of abnormal conditions, thereby avoiding equipment damage or personnel injury.

Description

Technical Field

[0001] This utility model relates to the field of bucket elevator technology, specifically to a bucket elevator fault detection device. Background Technology

[0002] Bucket elevators are continuous conveying machines that vertically lift materials using a series of buckets uniformly fixed to an endless traction component. They utilize a series of buckets attached to a traction chain or belt to transport bulk materials upwards in a vertical or near-vertical direction. There are three types: ring chain, plate chain, and belt. The elevator has a feed inlet at the tail end. Material in the hopper enters the elevator through this inlet. The buckets are lifted to the top by the conveyor belt or chain, pass over the top pulley, and then tilt downwards, dumping the material into a receiving trough. Chain-driven bucket elevators consist of two parallel drive chains, a drive wheel mounted at a high position, and a driven wheel at the lower feed inlet. During operation, jamming and stopping frequently occur. When problems arise, the reducer continues to run at high speed, often causing damage to the equipment or even rendering it unusable. Asynchrony between the drive and driven wheels, chain skipping, chain detachment, and chain hanging during operation pose threats to the machine and maintenance personnel. Utility Model Content

[0003] The purpose of this invention is to provide a fault detection device for bucket elevators, enabling timely detection of faults that occur during operation, thereby preventing equipment damage or personal injury.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A fault detection device for a bucket elevator includes a synchronous rotator and a photoelectric sensor. The synchronous rotator is coaxially mounted on the driven wheel shaft of the bucket elevator. The synchronous rotator includes a mounting part and at least one reflective part extending radially along the driven wheel shaft. The reflective part is used to reflect the light emitted by the photoelectric sensor.

[0006] Furthermore, the fault detection device includes a detection housing, which is connected to the casing of the bucket elevator.

[0007] Furthermore, a tensioning mechanism is provided on the outer side of the housing. The tensioning mechanism includes a tensioning rod, and a tensioning block is connected to the lower end of the tensioning rod. The tensioning block is connected to a bearing seat, and the bearing seat is used for the driven wheel shaft to rotate. One side of the detection box is connected to the tensioning block.

[0008] Furthermore, the detection box includes a first compartment and a second compartment, with a transparent non-metallic partition between the first compartment and the second compartment. The synchronous rotator is located in the first compartment, and the photoelectric sensor is located in the second compartment.

[0009] Furthermore, the second compartment is provided with a wire hole for the cable connecting the photoelectric sensor to pass through.

[0010] Furthermore, the mounting part is a connecting rod coaxial with the driven wheel shaft, and the reflective part is provided with 4 to 8 parts, which are evenly spaced along the circumference of the connecting rod.

[0011] Furthermore, the connecting rod and the driven wheel shaft are connected by one of the following methods: threaded assembly, welding fixation, or bolt connection.

[0012] Furthermore, the upper end of the tensioning rod passes through the limiting seat, which is fixed to the machine housing. A spring is sleeved on the tensioning rod, and a limiting nut is provided on the tensioning rod. The upper end of the spring abuts against the limiting seat and the upper end of the spring abuts against the limiting nut.

[0013] Furthermore, the tensioning block is fixed on the slide plate, which has a through hole for the driven wheel axle to pass through.

[0014] Furthermore, a pair of limiting grooves are provided on the outer side of the housing, and the two side edges of the slide plate are located in the limiting grooves and can move up and down.

[0015] The beneficial effects of this utility model are:

[0016] The detection device of this invention is installed on the bearing seat of the bucket elevator that mates with the driven wheel shaft. Light emitted by the photoelectric sensor transmitter of the detection device is reflected back to the receiver by the reflector of the synchronous rotator. When the reflector of the synchronous rotator being detected passes through and completely blocks the light, the photoelectric sensor generates a detection switch signal. Based on the signal, it can be determined whether the rotational speed of the synchronous rotator is normal. Since the synchronous rotator rotates synchronously with the driven wheel, it reflects the rotational speed of the driven wheel. By comparing this speed with a set value, it can be determined whether the bucket elevator is operating normally. This detection device can detect whether the equipment is operating normally, and can promptly alarm or stop the machine in case of abnormalities, thereby avoiding equipment damage or injury to personnel. Attached Figure Description

[0017] Figure 1 This is a partial structural view of the bucket elevator fault detection device of this utility model near the bottom;

[0018] Figure 2 yes Figure 1 A partial view in the middle;

[0019] Figure 3 This is a partial view of the bucket elevator fault detection device of this utility model (with the cover plate of the detection box removed);

[0020] Figure 4 This is a partial view of the internal structure of the bucket elevator fault detection device of this utility model.

[0021] 1. Machine housing; 11. Feed inlet; 21. Limit seat; 22. Spring; 23. Limit nut; 24. Tensioning rod; 25. Tensioning block; 3. Detection box; 31. Wire hole; 32. Non-metallic partition; 33. Cover plate; 4. Slide plate; 5. Limiting slide groove; 6. Bearing seat; 7. Synchronous rotator; 71. Reflector; 8. Photoelectric sensor; 91. Chain; 92. Driven wheel; 93. Hopper. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art are within the protection scope of the present utility model.

[0023] Embodiments of this utility model:

[0024] like Figures 1-4 As shown, the bucket elevator fault detection device includes a synchronous rotator 7 and a photoelectric sensor 8. The synchronous rotator 7 is a mechanical structural component, coaxially mounted on the driven wheel shaft of the bucket elevator. The synchronous rotator 7 includes a mounting part and at least one reflective part 71 extending radially along the driven wheel shaft; the reflective part 71 is used to reflect the light emitted by the photoelectric sensor 8. The photoelectric sensor 8, also called a photoelectric switch, integrates a transmitter and a receiver. The light emitted by the photoelectric switch transmitter is reflected back to the receiver by the reflective part 71 (part of the detected object). When the detected object passes by and completely blocks the light, the photoelectric switch generates a detection switch signal. Based on the signal, it can be determined whether the rotation speed of the synchronous rotator 7 is normal. Since the synchronous rotator 7 is synchronized with the driven wheel 92, it reflects the rotation speed of the driven wheel 92. By comparing it with the set value, it can be determined whether the bucket elevator is operating normally.

[0025] The mounting part is a connecting rod coaxial with the driven wheel axle. There are six reflective parts 71, which are six sheet-like structures, evenly spaced along the circumference of the connecting rod. In other embodiments, one reflective part or other quantities such as four to eight may also be used. The more reflective parts 71 spaced circumferentially, the more signals the photoelectric sensor 8 can receive per unit time, resulting in more sensitive detection.

[0026] The connecting rod and the driven wheel shaft are connected by one of the following methods: threaded assembly, welding, or bolting. For example, an internal threaded hole is machined at the end of the driven wheel shaft for the connecting rod to be installed. Alternatively, the end of the connecting rod away from the reflector 71 can be directly welded to the end face of the driven wheel shaft. Or, a flange plate (with two bolt holes) can be welded to one end of the connecting rod and bolted to the end face of the driven wheel shaft.

[0027] The fault detection device includes a detection box 3, which is connected to the casing 1 of the bucket elevator.

[0028] A tensioning mechanism is provided on the outer side of the housing 1. The tensioning mechanism includes a tensioning rod 24. The lower end of the tensioning rod 24 is connected to a tensioning block 25. The tensioning block 25 is connected to a bearing seat 6. The bearing seat 6 is used for the driven wheel shaft to rotate.

[0029] The upper end of the tensioning rod 24 passes upward through the limiting seat 21, which is fixed to the housing 1. A spring 22 is sleeved on the tensioning rod 24, and a limiting nut 23 is also provided on the tensioning rod 24. The upper end of the spring 22 abuts against the limiting seat 21, and the upper end of the spring 22 abuts against the limiting nut 23. Since the driven wheel shaft is a floating assembly, it can float up and down within a certain range. Therefore, the tensioning mechanism pushes the bearing seat 6 downward. Tensioning mechanisms are provided on both opposite sides of the housing 1 to jointly tension the driven wheel shaft.

[0030] The tensioning block 25 is fixed on the slide plate 4, which is a rectangular plate with a through hole for the driven wheel shaft to pass through. This through hole is a round hole that fits the driven wheel shaft. The housing 1 has an elongated hole in the vertical direction for the driven wheel shaft to pass through. During assembly, the vertical position of the driven wheel shaft can be adjusted, and the tension of the tensioning mechanism can be adjusted using the limit nut 23 on the tensioning mechanism.

[0031] A pair of limiting grooves 5 are provided on the outer side of the housing 1. The two side edges of the slide plate 4 are located in the limiting grooves 5 and can move up and down. The limiting grooves 5 are formed by the space between the corner plate connected to the outside of the housing 1 and the outer wall of the housing 1. They provide a slot for the slide plate 4 to cooperate with when it moves up and down, and restrict it from coming out to the outside (away from the housing 1).

[0032] One side of the detection box 3 is connected to the tensioning block 25, but it is not directly fixed to the housing 1; when adjusting the position of the driven wheel shaft, the detection box 3 can also be adjusted.

[0033] The detection housing 3 includes a first compartment and a second compartment. The synchronous rotator 7 is located in the first compartment, and the photoelectric sensor 8 is located in the second compartment. The first compartment and the second compartment share a common cover plate 33 on their upper sides.

[0034] The second compartment is equipped with a cable hole 31 for the cable connecting the photoelectric sensor 8 to pass through and transmit the data to the control room.

[0035] A transparent non-metallic partition 32 is provided between the first and second compartments. The non-metallic partition 32 can be made of existing plastic sheet. By setting the non-metallic partition 32, external interference to the detection signal can be reduced. A slot is provided in the middle of the first and second compartments, near the side wall of the box, and the non-metallic partition 32 is inserted from top to bottom.

[0036] Because of the height of the bucket elevator, the attached diagram only shows the lower part of the bucket elevator and does not show the top structure such as the reducer and drive wheel.

[0037] The bucket elevator includes a double-row chain 91, which drives a drive wheel and a driven wheel 92. Multiple spaced buckets 93 are connected to the chain 91. A feed inlet 11 is located on the side of the casing 1 near the bottom. Material enters the elevator through the feed inlet 11. The buckets 93 are lifted to the top by the chain 91, pass over the top drive wheel, and then tilt downwards, dumping the material into a receiving trough. The elevator uses a flow-in feeding method, eliminating the need for bucket digging, minimizing material compression and collision, and reducing mechanical wear.

[0038] During normal production, the driven wheel 92 of the hoist rotates synchronously under the drive wheel, and the synchronous rotator 7 fixed to the shaft end of the driven wheel also rotates synchronously. Assuming the hoist speed is 53 rad / min, the synchronous rotator 7 has 6 reflectors 71, generating 6 signals per revolution, and a total of 318 signals per minute of continuous rotation. This data is used as a basis for comparing abnormal situations during production. It is set that receiving 318 (±3) signals is considered normal production under normal conditions. If the speed drops below this data within 1 minute, the control system sends a signal to the control terminal to trigger an alarm or shut down the machine.

[0039] The detection device in this embodiment can detect whether the equipment is operating normally, whether the driven wheel is rotating synchronously with the driving wheel, and whether the reducer is operating normally (the output speed of the reducer will decrease if the reducer is severely overloaded). If there is any abnormality, it can promptly alarm or stop the machine to avoid damage to the equipment or injury to personnel.

[0040] The bucket elevator fault detection device of this invention is applicable to chain, plate chain and belt bucket elevators.

Claims

1. A bucket elevator fault detection device, characterized in that: It includes a synchronous rotator and a photoelectric sensor. The synchronous rotator is coaxially mounted on the driven wheel shaft of the bucket elevator. The synchronous rotator includes a mounting part and at least one reflective part extending radially along the driven wheel shaft. The reflective part is used to reflect the light emitted by the photoelectric sensor.

2. The bucket elevator fault detection device according to claim 1, characterized in that: The fault detection device includes a detection box, which is connected to the casing of the bucket elevator.

3. The bucket elevator fault detection device according to claim 2, characterized in that: The outer side of the housing is provided with a tensioning mechanism, which includes a tensioning rod. The lower end of the tensioning rod is connected to a tensioning block, which is connected to a bearing seat. The bearing seat is used for the driven wheel shaft to rotate. One side of the detection box is connected to the tensioning block.

4. The bucket elevator fault detection device according to claim 3, characterized in that: The detection box includes a first compartment and a second compartment, with a transparent non-metallic partition between the first compartment and the second compartment. The synchronous rotator is located in the first compartment, and the photoelectric sensor is located in the second compartment.

5. The bucket elevator fault detection device according to claim 4, characterized in that: The second compartment is provided with a wire hole for the cable connecting the photoelectric sensor to pass through.

6. The bucket elevator fault detection device according to claim 1, characterized in that: The mounting part is a connecting rod coaxial with the driven wheel shaft, and there are 4 to 8 reflective parts, which are evenly spaced along the circumference of the connecting rod.

7. The bucket elevator fault detection device according to claim 6, characterized in that: The connecting rod and the driven wheel shaft are connected by one of the following methods: threaded assembly, welding, or bolt connection.

8. The bucket elevator fault detection device according to claim 3, characterized in that: The upper end of the tensioning rod passes through the limiting seat, which is fixed to the machine housing. A spring is sleeved on the tensioning rod, and a limiting nut is provided on the tensioning rod. The upper end of the spring abuts against the limiting seat and the upper end of the spring abuts against the limiting nut.

9. The bucket elevator fault detection device according to claim 3, characterized in that: The tensioning block is fixed on the slide plate, which has a through hole for the driven wheel axle to pass through.

10. The bucket elevator fault detection device according to claim 9, characterized in that: The outer side of the housing is provided with a pair of limiting slide grooves, and the two side edges of the slide plate are located in the limiting slide grooves and can move up and down.

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