Lower tensioning device of bucket elevator

Abstract

The utility model provides a bucket elevator lower portion tensioning device which comprises a machine shell with two channels and a heavy hammer device, bearing seats are arranged on the two outer sides of the machine shell in a sliding mode, and the two ends of a tail shaft of the machine shell penetrate through sliding plates to be fixed to the bearing seats. The top of the bearing seat is connected with a lead screw, and a fixing seat is arranged on the lead screw located on the upper portion of the middle frame body. The heavy hammer device comprises two balance weight rods and two balancing weights, two supporting bases are arranged on the outer side of the machine shell, one ends of the two balance weight rods are rotatably arranged on the outer sides of the supporting bases through balance weight shafts, the balancing weights are movably arranged at the free ends of the balance weight rods, long round through holes are formed in the middles of the balance weight rods, and the balance weight rods are arranged in the long round through holes. And a bolt penetrates through the long circular through hole and is arranged on the fixed seat. According to the tensioning device for the lower portion of the bucket elevator, the rear sides of the two balance weight levers of the counter weight device are arranged at the two ends of the same rotating shaft, the counter weight blocks are movably arranged at the free ends of the front sides of the balance weight levers, counter weight type tensioning of the bucket elevator is achieved, the counter weight blocks are separately placed, the load of the single balance weight lever is reduced, and later maintenance and adjustment are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of bucket elevators, in particular to a tensioning device at the lower part of a bucket elevator. Background Technique

[0002] A bucket elevator, also known as a bucket hoist, is composed of a head component, a middle casing, a lower component, a chain and a hopper, etc. The head component is assembled into one body by an upper casing, a driving shaft component, a driving mechanism, etc. The lower component is composed of a lower casing, a driven shaft component and a tensioning device. There is an openable door on the side of the casing for convenient inspection, maintenance or cleaning.

[0003] The tensioning device exists to ensure a constant tension between the conveyor belt (or chain) and the drum (or sprocket), and most of them are arranged on the two outer sides of the lower casing of the bucket elevator. At present, each manufacturer adopts two methods: screw tensioning or heavy hammer counterweight rod. Among them, the heavy hammer counterweight rod tensioning has a large volume, a large weight, inconvenient maintenance and adjustment, and is also prone to tilting due to uneven placement of counterweight blocks in the front counterweight box. Content of the Utility Model

[0004] The utility model provides a tensioning device at the lower part of a bucket elevator, which cleverly designs a heavy hammer device for convenient maintenance and adjustment.

[0005] The utility model is realized as follows:

[0006] A tensioning device at the lower part of a bucket elevator includes a casing with a double channel and a heavy hammer device. Rectangular frames are respectively arranged on the two outer sides of the casing. A bearing seat is slidably arranged in the middle frame body of the rectangular frame. Sliding plates that can move up and down are respectively arranged on the two inner sides of the casing. A tail shaft is horizontally arranged inside the casing, and both ends of the tail shaft pass through the sliding plates and are fixed on the bearing seat. A screw rod is connected to the top of the bearing seat, and the screw rod passes upward through the top of the middle frame body and the top of the rectangular frame and is arranged outside the rectangular frame. A fixed seat is arranged on the screw rod at the upper part of the middle frame body. The heavy hammer device includes two counterweight rods and two counterweight blocks. Two support seats are arranged on the outer side of the casing. One end of each of the two counterweight rods is rotatably arranged outside the support seat through a counterweight shaft, and the other end is a free end. The counterweight block is movably arranged at the free end of the counterweight rod. A long circular through hole is formed in the middle of the counterweight rod, and a bolt passes through the long circular through hole and is arranged on the fixed seat.

[0007] Preferably, a connecting column is rotatably arranged in the two support seats, and both ends of the connecting column extend out of the support seats to form fixed sleeves. The counterweight shaft is arranged in the fixed sleeve on the outer side, and a rotating shaft is arranged between the fixed sleeves on the inner side. The rotating shaft is parallel to the tail shaft.

[0008] Preferably, it also includes a counterweight box located between the double channels of the casing, the counterweight box is movably sleeved on the top of the screw rod, a plurality of compartments are formed inside the counterweight box by partition plates, and the screw rods are respectively arranged in the compartments on both sides of the counterweight box.

[0009] Preferably, a clearance sleeve is provided in the counterweight box at a position corresponding to the screw rod, the upper part of the screw rod is inserted into the clearance sleeve, and a gasket and a support nut are provided on the outer side of the connection between the screw rod and the counterweight box.

[0010] Preferably, two adjusting nuts are sleeved on the screw rod, one adjusting nut is located inside the rectangular frame and above the fixing seat, and the other adjusting nut is located outside the top of the rectangular frame.

[0011] Preferably, a material level sensor is provided at the lower portion of the casing, and a proximity sensor is provided on the bearing seat located at one end of the tail shaft.

[0012] Preferably, a sealed door is provided on the outer side of the middle frame body of the rectangular frame.

[0013] Preferably, cleaning doors are symmetrically provided at the lower portions of both side walls of the casing, and an inspection door is provided on the side wall of the casing above one of the cleaning doors.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: the lower tensioning device of the bucket elevator arranges the rear sides of the two counterweight rods of the weight device at the two ends of the same rotating shaft, and the counterweight blocks are movably arranged at the front free ends of the respective counterweight rods to realize the weight-type tensioning of the bucket elevator. This structure places the counterweight blocks separately, reduces the load of a single counterweight rod, and facilitates later maintenance and adjustment; at the same time, a counterweight box is arranged on the top, and the horizontality of the counterweight box can be observed to determine whether the tail shaft is in a horizontal state, and further counterweight particles can be added in the compartment of the counterweight box to adjust the horizontality of the counterweight box. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the front view of the utility model.

[0016] Figure 2 It is a top view of the utility model with some structures removed.

[0017] Figure 3 It is a right half-section view of the utility model.

[0018] Figure 4 It is a structural schematic diagram of the bearing seat.

[0019] In the figure: 1. casing; 2. rectangular frame; 3. bearing seat; 4. slide plate; 5. tail shaft; 6. screw rod; 7. fixing seat; 8. counterweight rod; 9. counterweight block; 10. supporting seat; 11. counterweight shaft; 12. oblong through hole; 13. fixing sleeve; 14. rotating shaft; 15. counterweight box; 16. clearance sleeve; 17. supporting nut; 18. adjusting nut; 19. material level sensor; 20. proximity sensor; 21. skeleton oil seal; 22. arc signal sheet; 23. deviation switch; 24. sealing door; 25. cleaning door; 26. inspection door; 2-1. middle frame; 3-1. bearing seat body; 3-2. bearing; 3-3. end cover. DETAILED DESCRIPTION

[0020] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0021] The utility model discloses a tensioning device for the lower part of a bucket elevator, comprising a casing 1 with a double channel and a weight device, wherein rectangular frames 2 are respectively arranged on the two outer sides of the casing 1, and a middle frame 2-1 is separated by a horizontal plate in the rectangular frame, and a bearing seat 3 is slidably arranged in the middle frame of the rectangular frame, and slide plates 4 that can move up and down are respectively arranged on the two inner sides of the casing 1, and a tail shaft 5 is horizontally arranged inside the casing 1, and the two ends of the tail shaft 5 pass through the slide plates 4 and are fixed on the bearing seat 3; a screw rod 6 is connected to the top of the bearing seat 3, and the screw rod 6 passes upward through the top of the middle frame and the top of the rectangular frame and is arranged on the outer side of the rectangular frame, and is positioned A fixing seat 7 is arranged on the screw rod 6 at the upper part of the middle frame, and the fixing seat 7 is fixed by locking with two nuts; the heavy hammer device comprises two counterweight rods 8 and two counterweight blocks 9, and two supporting seats 10 are arranged on the outer side of the casing 1. One end of the two counterweight rods 8 is rotatably arranged on the outer side of the supporting seat 10 through a counterweight shaft 11, and the other end is a free end. The two counterweight blocks 9 are movably arranged on the free ends of their respective counterweight rods 8. An oblong through hole 12 is opened in the middle part of the counterweight rod 8, and a bolt is arranged on the fixing seat 7 through the oblong through hole. The bolt and the oblong hole are movably arranged relative to each other, and when the free end of the counterweight rod moves up and down, the bolt can move along the oblong through hole.

[0022] In this embodiment, the counterweight rod is arranged in such a way that a connecting column is rotatably arranged in the two support seats 10, and the two ends of the connecting column extend out of the support seats to form a fixing sleeve 13, the counterweight shaft 11 is arranged in the fixing sleeve 13 located on the outside, and a rotating shaft 14 is arranged between the fixing sleeves 13 located on the inside, and the rotating shaft 14 is parallel to the tail shaft 5. The rotating shaft can control the consistency of the adjustment height of the counterweight rods on both sides to a certain extent. When the two counterweight rods rise or fall to different heights, there will be a difference between the rotating shaft and the counterweight shaft, and the adjustment will not be smooth.

[0023] When in use, by replacing the counterweight blocks of different weights, the free end of the counterweight rod is moved upward or downward, the oblong through hole of the counterweight rod is relatively tilted upward or downward, and the bolt moves upward or downward along the oblong through hole to lift the screw rod, and then the screw rod drives the bearing seat to rise or fall, so as to realize the lifting and loosening or downward tightening of the tail shaft. Since the counterweight blocks are arranged at one end of each counterweight rod, compared with the counterweight blocks arranged on the front end cross bar of the counterweight rod, they are small in size, relatively light in weight, and easy to maintain and adjust.

[0024] Since the counterweight blocks are arranged at one end of each counterweight rod, in order to further ensure the horizontality of the rear tail shaft after adjustment, a counterweight box 15 is also included between the double channels of the casing, and the counterweight box 15 is movably sleeved on the top of the screw rod 8; a plurality of compartments are formed inside the counterweight box 15 through a partition plate, and the screw rods are respectively arranged in the compartments on both sides of the counterweight box. The horizontality of the counterweight box can be observed to determine whether the bearing seats on both sides are adjusted to the same height, thereby ensuring the horizontality of the tail shaft. At the same time, counterweight particles can be added in the compartment to adjust the horizontality of the counterweight box.

[0025] Specifically, the counterweight box is arranged so as to be sleeved on the top of the screw rod, a clearance sleeve 16 is opened in the counterweight box 15 at a position corresponding to the screw rod, the upper part of the screw rod 8 is inserted into the clearance sleeve 16, and a gasket and a support nut 17 are arranged on the outside of the connection between the screw rod 8 and the counterweight box 15.

[0026] Since the tensioning device of the belt bucket elevator only needs to be adjusted when the belt is tensioned and deviated, the slide plate does not need to slide after adjustment, and when the weight device is tensioned and pressed lightly, the tail shaft always jumps. Therefore, two adjusting nuts 18 are sleeved on the screw rod 8, one adjusting nut 18 is located inside the rectangular frame 2 and above the fixed seat 7, and the other adjusting nut 18 is located on the outside of the top of the rectangular frame 2. Loosening the upper adjusting nut (or the lower adjusting nut) can make the screw rod move downward (or upward) with the counterweight rod, so that the tail shaft moves downward (or upward) to adjust the tension. After the adjustment is completed, rotate the two adjusting nuts so that they are respectively set against the inner side of the top of the rectangular frame and the outer side of the top of the rectangular frame.

[0027] In this embodiment, a level sensor 19 is provided at the lower part of the casing 1, and a proximity sensor 20 is provided on the bearing block 3 at one end of the tail shaft. The level sensor is a rotary vane level switch, which plays a role in transmitting signals when the material is blocked, and can effectively monitor whether the material in the hopper is blocked and issue a warning. The proximity sensor determines whether the tail shaft is rotating based on whether it can intermittently detect the tail shaft. When the head pulley slips or jams and cannot rotate, or when the conveyor belt breaks, the tail shaft does not move, and the proximity sensor will be in a state of continuously detecting the tail shaft or continuously not detecting the tail shaft. At this time, the belt break protector connected to it senses the signal change and will issue an alarm message.

[0028] As Figure 4 shown, it is the structure of the two bearing blocks at both ends of the tail shaft. The bearing blocks 3 both include a bearing block body 3-1, a bearing 3-2, and an end cover 3-3. The bearing 3-2 is sleeved on the end of the tail shaft 5, the bearing block body 3-1 is sleeved on the outside of the bearing 3-2, and a skeleton oil seal 21 is provided on the inner side end of the bearing block body 3-1 in contact with the tail shaft. A stop washer and a retaining ring are provided at the end of the bearing 3-2, and the two are fixed to the end of the tail shaft by screws. The end cover 3-3 is provided on the outside of the bearing block body 3-1. A connecting seat is provided at the upper end of the bearing block body, and the lower end of the lead screw is arranged in the connecting seat and fixed by screws. Among them, in order to facilitate the installation of the proximity sensor, the retaining ring and the end cover of the bearing block equipped with the proximity sensor are designed into a special structure. Arc-shaped signal pieces 22 are arranged at intervals in the circumferential direction on the outer side surface of the retaining ring. The end cover forms a cylindrical column that can accommodate the arc-shaped signal pieces. The proximity sensor 20 is inserted through the side wall of the cylindrical column of the end cover. The retaining ring rotates with the tail shaft. Due to the interval arrangement of the arc-shaped signal pieces, the proximity sensor can intermittently detect the arc-shaped signal pieces. At this time, it is default that the tail shaft is in a normal rotation state. When the tail shaft hardly rotates, the proximity sensor will be in a state of continuously detecting the arc-shaped signal pieces or continuously not detecting the arc-shaped signal pieces. It can be understood that the detected signal frequency is incorrect. The belt break protector connected to it senses the signal change and will issue an alarm message.

[0029] At the same time, deviation switches 23 are symmetrically arranged on the two inner sides of the casing. The deviation switches are arranged in a channel on one side of the casing and above the rotating shaft. When used to judge whether the conveyor belt deviates, once deviation occurs, the deviation switch acts to send a signal.

[0030] In order to further prevent dust, a sealing door 24 is provided on the outside of the middle frame body 2-1 of the rectangular frame 2. Cleaning doors 25 are symmetrically opened at the lower parts of the two side walls of the casing, and a maintenance door 26 is opened on the side wall of the casing above one of the cleaning doors.

[0031] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A tensioning device for the lower part of a bucket elevator, comprising a housing with a double channel and a weight device, wherein rectangular frames are respectively arranged on the two outer sides of the housing, a bearing seat is slidably arranged in the middle frame of the rectangular frame, and slide plates that can move up and down are respectively arranged on the two inner sides of the housing, a tail shaft is horizontally arranged inside the housing, and both ends of the tail shaft pass through the slide plates and are fixed on the bearing seats; characterized in that: A screw rod is connected to the top of the bearing seat, and the screw rod passes upward through the top of the middle frame and the top of the rectangular frame and is arranged on the outside of the rectangular frame. A fixed seat is arranged on the screw rod located on the upper part of the middle frame; the heavy hammer device includes two counterweight rods and two counterweight blocks. Two support seats are arranged on the outside of the casing. One end of the two counterweight rods can be rotatably arranged on the outside of the support seat through a counterweight shaft, and the other end is a free end. The counterweight block is movably arranged on the free end of the counterweight rod. An oblong through hole is opened in the middle of the counterweight rod, and a bolt passes through the oblong through hole and is arranged on the fixed seat.

2. The lower tensioning device of the bucket elevator according to claim 1, characterized in that: A connecting column is rotatably arranged in the two support seats, and both ends of the connecting column extend out of the support seats to form a fixed sleeve, the counterweight shaft is arranged in the fixed sleeve located on the outside, and a rotating shaft is arranged between the fixed sleeves located on the inside, and the rotating shaft is parallel to the tail shaft.

3. The lower tensioning device of the bucket elevator according to claim 1, characterized in that: It also includes a counterweight box located between the double channels of the casing, the counterweight box is movably sleeved on the top of the screw rod, a plurality of compartments are formed inside the counterweight box through a partition plate, and the screw rods are respectively arranged in the compartments on both sides of the counterweight box.

4. The lower tensioning device of the bucket elevator according to claim 3, characterized in that: A clearance sleeve is provided in the counterweight box at a position corresponding to the screw rod, the upper part of the screw rod is inserted into the clearance sleeve, and a gasket and a support nut are provided on the outside of the connection between the screw rod and the counterweight box.

5. The lower tensioning device of the bucket elevator according to claim 1, characterized in that: Two adjusting nuts are sleeved on the screw rod, one adjusting nut is located inside the rectangular frame and above the fixing seat, and the other adjusting nut is located outside the top of the rectangular frame.

6. The lower tensioning device of the bucket elevator according to claim 1, characterized in that: A material level sensor is arranged at the lower part of the casing, and a proximity sensor is arranged on the bearing seat at one end of the tail shaft.

7. The lower tensioning device of the bucket elevator according to claim 1, characterized in that: A sealing door is arranged on the outer side of the middle frame body of the rectangular frame.

8. The lower tensioning device of the bucket elevator according to claim 1, characterized in that: Cleaning doors are symmetrically provided at the lower parts of the two side walls of the casing, and an inspection door is provided on the side wall of the casing above the cleaning door.

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