Automatic adjusting device for conveying belt

Abstract

The utility model relates to an automatic adjusting device for a conveying belt, which is characterized in that two ends of a central shaft of a driven roller of the conveying belt are respectively mounted on transverse joists on two sides of a main bracket through bearing seats, the two transverse joists are provided with through grooves, a first screw rod is arranged in the through groove of the transverse joist on one side, and the first screw rod is driven by a first motor; a second lead screw is arranged in the through groove of the transverse joist on the other side and driven by a second motor. The ends, close to the driven roller, of the first lead screw and the second lead screw are connected with bearing pedestals through moving pieces correspondingly. A first supporting rod is arranged on one side of the middle section of the conveying belt, a second supporting rod symmetrical to the first supporting rod is arranged on the other side of the middle section of the conveying belt, and three sensors are installed on the first supporting rod and the second supporting rod in parallel. Structural design is reasonable, operation is easy and convenient, photoelectric detection signals are sensed to be transmitted into a control system, movement of the conveyor belt driven roller is adjusted through the moving piece, and therefore the belt position is corrected. The labor cost is reduced, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the belt conveying matched equipment field, concretely relates to a conveying belt automatic adjusting device. BACKGROUND

[0002] The belt conveyor is widely applied in the industrial field such as building material, metallurgy, chemical industry, environmental protection etc. The uneven force of the uneven material in the operation process of the existing belt conveyor causes the phenomenon of belt deviation, cannot be found and adjusted in time, thereby cannot guarantee the safe and stable operation of the belt, and influences the work efficiency. SUMMARY

[0003] The utility model aims at making up for the defects of the existing equipment, and provides a conveying belt automatic adjusting device.

[0004] In order to achieve the above-mentioned purpose, the utility model takes the technical scheme: a conveying belt automatic adjusting device, the both sides of main support are equipped with roller bracket, a plurality of rollers are equipped between the two roller brackets, the roller is equipped with conveyer belt, the conveyer belt is driven to run by the driving drum at the front end and the driven drum at the tail end, characterized in that: the central shaft of the driven drum is respectively installed on the cross beam on the both sides of main support through bearing seat, one end of the two cross beams is fixed with main support, and the other end is supported by rear support;

[0005] The through groove is formed in the axis direction of the two cross beams, the through groove in the cross beam of one side is equipped with first lead screw, and the end of first lead screw that extends out of the through groove is connected with the output shaft of first motor through first coupling; the through groove in the cross beam of the other side is equipped with second lead screw, and the end of second lead screw that extends out of the through groove is connected with the output shaft of second motor through second coupling; one end of first lead screw and second lead screw that is close to driven drum is respectively connected with bearing seat through moving part;

[0006] One side of the middle section of conveyer belt is equipped with first support rod, the other side is equipped with second support rod that is symmetrical with first support rod, and first support rod and second support rod are L-shaped; a number of outer inductors, middle inductors and inner inductors are sequentially installed on the surface of first support rod; a number of second outer inductors, second middle inductors and second inner inductors are sequentially installed on the surface of second support rod.

[0007] The conveyer belt is also equipped with tightness adjuster.

[0008] The moving part includes two nuts that are spaced apart by a certain distance, the two nuts are threadedly connected with first lead screw or second lead screw, the surface of cross beam is provided with top plate, and the top plate is located above the two nuts, the surface of top plate is attached to buckle plate, the cross section of buckle plate is "J" character-shaped, and there is a certain gap between the two sides of buckle plate and the two sides of cross beam, the bottom surface of the two nuts is respectively fixed with bottom plate arranged on the bottom surface of cross beam, and the bottom plate and buckle plate lower edge are fixed by bolt.

[0009] The tension adjuster comprises a small roller arranged longitudinally on the tail end working surface of the conveying belt, the central axis of the small roller is fixed with a pull rod at both ends, the other end of the pull rod is hinged to the upright column on both sides of a small bracket, the small bracket is fixed on a moving piece, and the upright column on one side of the small bracket is provided with an upper proximity switch and a lower proximity switch.

[0010] The other end of the pull rod is hinged to the upright column on both sides of the small bracket, and the hinge point is located between the upper proximity switch and the lower proximity switch.

[0011] The first outer inductor and the second outer inductor are symmetrical and located above the roller bracket; the first middle inductor and the second middle inductor are symmetrical and located above the gap between the edge of the conveying belt and the roller bracket; and the first inner inductor and the second inner inductor are symmetrical and located above the inner side of the two edges of the conveying belt.

[0012] The first outer inductor, the first middle inductor, the first inner inductor, the second outer inductor, the second middle inductor and the second inner inductor are interlocked and controlled by a PLC control system.

[0013] The upper proximity switch and the lower proximity switch are interlocked with the first motor and the second motor and controlled by a PLC control system.

[0014] The beneficial effects of the utility model are: the structure design is reasonable, operation is simple and convenient, the inductive photoelectric detection signal is transmitted into a control system, the control system judges the belt deviation position accordingly, and then controls the steering of the first motor and the second motor, the movement of the driven roller of the conveying belt is adjusted by the moving piece, so that the belt position is corrected. Meanwhile, a tension adjuster is designed, the tightening or loosening of the conveying belt is automatically controlled, so that it is timely restored to the normal state. The artificial cost is reduced, and the work efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

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

[0016] Figure 2 It is the plan view of the utility model;

[0017] Figure 3 It is the A part enlarged view of the utility model; Figure 1

[0018] Figure 4 It is the B-B sectional view of the utility model; Figure 3

[0019] ​​In the figure: 1 - first motor, 2 - second motor, 3 - first coupling, 4 - second coupling, 5 - first screw rod, 6 - second screw rod, 7 - cross beam, 8 - main support, 9 - moving part, 91 - nut, 92 - top plate, 93 - buckle plate, 94 - bottom plate; 10 - driven roller, 11 - bearing seat, 12 - small support, 13 - upper proximity switch, 14 - lower proximity switch, 15 - small roller, 16 - pull rod, 17 - first support rod, 18 - second support rod, 19 - conveyor belt, 20 - rear support, 21 - roller frame;

[0020] A1 - one outer sensor, B1 - one middle sensor, C1 - one inner sensor, A2 - two outer sensor, B2 - two middle sensor, C2 - two inner sensor. DETAILED DESCRIPTION

[0021] See Figures 1-4 An automatic adjusting device for a conveyor belt, the main support 8 is provided with roller frames 21 on both sides, a plurality of rollers are arranged between the two roller frames 21, and the rollers are provided with

[0022] The conveyor belt 19 is driven to run by the driving roller at the front end and the driven roller 10 at the tail end, characterized in that: the central shaft of the driven roller 10 is respectively installed on the cross beams 7 on both sides of the main support 8 through the bearing seats 11, one end of the two cross beams 7 is fixed with the main support 8, and the other end is supported by the rear support 20.

[0023] Grooves are arranged in the axial direction of the two cross beams 7, the first screw rod 5 is arranged in the groove of one side cross beam 7, the end of the first screw rod 5 extending out of the groove is connected with the output shaft of the first motor 1 through the first coupling 3, the second screw rod 6 is arranged in the groove of the other side cross beam 7, the end of the second screw rod 6 extending out of the groove is connected with the output shaft of the second motor 2 through the second coupling 4, and one end of the first screw rod 5 and the second screw rod 6 close to the driven roller 10 is respectively connected with the bearing seat 11 through the moving part 9.

[0024] The first support rod 17 is arranged on one side of the middle section of the conveyor belt 19, and the second support rod 18 symmetrical to the first support rod 17 is arranged on the other side, the first support rod 17 and the second support rod 18 are L-shaped, the first support rod 17 is sequentially provided with the outer sensor A1, the middle sensor B1 and the inner sensor C1 from top to bottom, and the second support rod 18 is sequentially provided with the outer sensor A2, the middle sensor B2 and the inner sensor C2 from top to bottom.

[0025] The tightness adjuster is further arranged on the conveyor belt 19.

[0026] The moving part 9 comprises two nuts 91 spaced apart, the two nuts 91 are threadedly connected with the first screw rod 5 or the second screw rod 6, the surface of the cross beam 7 is provided with a top plate 92, and the top plate 92 is located above the two nuts 91, the surface of the top plate 92 is attached to a buckle plate 93, the cross section of the buckle plate 93 is in the shape of a "Ji" character, the two sides of the buckle plate 93 are spaced apart from the two sides of the cross beam 7, and the bottom surfaces of the two nuts 91 are fixed with a bottom plate 94 arranged at the bottom surface of the cross beam 7, and the bottom plate 94 and the lower edge of the buckle plate 93 are fixed by bolts.

[0027] The tension adjuster comprises a small roller 15 arranged longitudinally on the working surface near the tail end of the conveying belt 19, the center axis of the small roller 15 is fixed with a pull rod 16 at both ends, the other end of the pull rod 16 is hinged to the upright columns on both sides of a small bracket 12, the small bracket 12 is fixed on the moving part 9, and an upper proximity switch 13 and a lower proximity switch 14 are arranged on the upright column on one side of the small bracket 12.

[0028] The other end of the pull rod 16 is hinged to the upright columns on both sides of the small bracket 12, and the hinge points are located between the upper proximity switch 13 and the lower proximity switch 14.

[0029] The first outer inductor A1 and the second outer inductor A2 are symmetrical and located above the top of the roller bracket 21; the first middle inductor B1 and the second middle inductor B2 are symmetrical and located above the gap between the edge of the conveying belt 19 and the roller bracket 21; and the first inner inductor C1 and the second inner inductor C2 are symmetrical and located above the inner side of the two edges of the conveying belt 19.

[0030] The first outer inductor A1, the first middle inductor B1, the first inner inductor C1, the second outer inductor A2, the second middle inductor B2 and the second inner inductor C2 are interlocked and controlled by a PLC control system.

[0031] The upper proximity switch 13 and the lower proximity switch 14 are interlocked with the first motor 1 and the second motor 2, and are controlled by a PLC control system.

[0032] The working principle is as follows:

[0033] I. Normal operation of the conveying belt

[0034] When the first inner inductor C1 and the second inner inductor C2 simultaneously detect the conveying belt 19, and the first middle inductor B1, the second middle inductor B2, the first outer inductor A1 and the second outer inductor A2 do not detect the belt, it indicates that the belt is in a normal position, at the same time, the small roller 15 rolls normally with the conveying belt 19, the pull rod 16 does not touch the upper proximity switch 13 or the lower proximity switch 14, the first motor 1 and the second motor 2 are not started, and the tension of the conveying belt 19 is normal.

[0035] II. slight deviation of the conveyor belt

[0036] When the No. 1 inner sensor C1, the No. 1 middle sensor B1, the No. 1 outer sensor A1 can detect the conveyor belt 19, and the No. 2 inner sensor C2, the No. 2 middle sensor B2, the No. 2 outer sensor A2 cannot detect the conveyor belt 19, it indicates that the conveyor belt 19 is seriously deviated. The above sensors will transmit the detection signals to the PLC control system to control the first motor 1 and the second motor 2 to run at the same time. The first motor 1 rotates at high speed to tighten the conveyor belt 19 on this side, and the second motor 2 rotates at high speed to loosen the conveyor belt 19 on this side, until the conveyor belt 19 is in the normal position. The PLC control system controls the first motor 1 and the second motor 2 to close at the same time. Figure 2

[0037] At the same time, the second motor 2 reverses to move the driven roller 10 on the side of the second motor 2 to the left of the position shown in FIG. 8, loosens the conveyor belt 19 on the side of the second motor 2, until the No. 1 inner sensor C1 and the No. 2 inner sensor C2 detect the conveyor belt 19 at the same time, and the No. 1 middle sensor B1, the No. 2 middle sensor B2, the No. 1 outer sensor A1, and the No. 2 outer sensor A2 cannot detect the conveyor belt 19, indicating that the conveyor belt 19 is in the normal position. The PLC control system controls the first motor 1 and the second motor 2 to close at the same time. Figure 2

[0038] It should be noted that when the conveyor belt is slightly deviated, the PLC control system is set to control the running distance of the first motor 1 and the second motor 2 to be about 10 minutes after the previous running interval. Because of the delay in adjustment, the motor is prevented from being frequently started.

[0039] III. serious deviation of the conveyor belt

[0040] When the No. 1 inner sensor C1, the No. 1 middle sensor B1, the No. 1 outer sensor A1 can detect the conveyor belt 19, and the No. 2 inner sensor C2, the No. 2 middle sensor B2, the No. 2 outer sensor A2 cannot detect the conveyor belt 19, it indicates that the conveyor belt 19 is seriously deviated. The above sensors will transmit the detection signals to the PLC control system to control the first motor 1 and the second motor 2 to run at the same time. The first motor 1 rotates at high speed to tighten the conveyor belt 19 on this side, and the second motor 2 rotates at high speed to loosen the conveyor belt 19 on this side, until the conveyor belt 19 is in the normal position. The PLC control system controls the first motor 1 and the second motor 2 to close at the same time.

[0041] IV. the conveyor belt is not deviated but the tension is abnormal

[0042] ​​When the inner sensor C1 and the inner sensor C2 simultaneously detect the conveyor belt 19, and the middle sensor B1, the middle sensor B2, the outer sensor A1 and the outer sensor A2 do not detect the conveyor belt, and the pull rod 16 on the small roller 15 is close to the lower proximity switch 14, it indicates that the conveyor belt is not deviated but is too loose. At this time, the PLC control system controls the first motor 1 and the second motor 2 to rotate in the same direction, tightens the conveyor belt, until the conveyor belt 19 is in the normal position, and the PLC control system controls the first motor 1 and the second motor 2 to be closed at the same time.

[0043] When the inner sensor C1 and the inner sensor C2 simultaneously detect the conveyor belt 19, and the middle sensor B1, the middle sensor B2, the outer sensor A1 and the outer sensor A2 do not detect the conveyor belt, and the pull rod 16 on the small roller 15 is close to the lower proximity switch 14, it indicates that the conveyor belt is not deviated but is too loose. At this time, the PLC control system controls the first motor 1 and the second motor 2 to rotate in the same direction, tightens the conveyor belt, until the conveyor belt 19 is in the normal position, and the PLC control system controls the first motor 1 and the second motor 2 to be closed at the same time.

Claims

1. A conveyor belt automatic adjustment device, wherein roller frames (21) are provided on both sides of a main support (8), a plurality of rollers are provided between the two roller frames (21), a conveyor belt (19) is provided on the rollers, and the conveyor belt (19) is driven by a driving roller at the front end and a driven roller (10) at the rear end, characterized in that: Both ends of the central axis of the driven roller (10) are respectively installed on the cross beams (7) on both sides of the main bracket (8) through bearing seats (11). One end of the two cross beams (7) is fixed to the main bracket (8), and the other end is supported by the rear bracket (20). Through slots are opened in the axial direction of the two cross beams (7). A first screw rod (5) is arranged in the through slot of one side cross beam (7). The end of the first screw rod (5) extending out of the through slot is connected to the output shaft of the first motor (1) through a first coupling (3). A second screw rod (6) is arranged in the through slot of the other side cross beam (7). The end of the second screw rod (6) extending out of the through slot is connected to the output shaft of the second motor (2) through a second coupling (4). One ends of the first screw rod (5) and the second screw rod (6) close to the driven roller (10) are respectively connected to the bearing seat (11) through moving parts (9). On one side of the middle section of the conveyor belt (19), there is a first support rod (17), and on the other side, there is a second support rod (18) symmetric to the first support rod (17). The first support rod (17) and the second support rod (18) are L-shaped. An outer sensor No.1 (A1), a middle sensor No.1 (B1), and an inner sensor No.1 (C1) are successively installed on the first support rod (17). An outer sensor No.2 (A2), a middle sensor No.2 (B2), and an inner sensor No.2 (C2) are successively installed on the second support rod (18). A tension adjuster is also provided on the conveyor belt (19).

2. The automatic adjustment device for a conveyor belt according to claim 1, characterized in that: The moving part (9) includes two nuts (91) spaced at a certain distance. The two nuts (91) are threadedly connected to the first screw rod (5) or the second screw rod (6). A top plate (92) is arranged on the surface of the cross beam (7), and the top plate (92) is located above the two nuts (91). A buckle plate (93) is fitted on the surface of the top plate (92). The cross section of the buckle plate (93) is "U" shaped. There are certain gaps between both sides of the buckle plate (93) and both sides of the cross beam (7). The bottom surfaces of the two nuts (91) are respectively fixed to a bottom plate (94) arranged on the bottom surface of the cross beam (7), and the bottom plate (94) and the lower edge of the buckle plate (93) are fixed with bolts.

3. The automatic conveyor belt adjustment device according to claim 1 or 2, characterized in that: The tension adjuster includes a small roller (15) longitudinally arranged on the working surface near the tail end of the conveyor belt (19). Both ends of the central axis of the small roller (15) are respectively fixed with a pull rod (16). The other ends of the pull rods (16) are hinged on the columns on both sides of the small bracket (12). The small bracket (12) is fixed on the moving part (9). An upper proximity switch (13) and a lower proximity switch (14) are arranged on the column on one side of the small bracket (12).

4. The automatic conveyor belt adjustment device according to claim 3, characterized in that: The other ends of the pull rods (16) are hinged on the columns on both sides of the small bracket (12). The hinge points of the pull rods (16) and the small bracket (12) are located between the upper proximity switch (13) and the lower proximity switch (14).

5. The automatic conveyor belt adjustment device according to claim 1, characterized in that: The first outer sensor (A1) and the second outer sensor (A2) are symmetrical and located above the roller frame (21); the first middle sensor (B1) and the second middle sensor (B2) are symmetrical and located above the gap between the edge of the conveyor belt (19) and the roller frame (21); the first inner sensor (C1) and the second inner sensor (C2) are symmetrical and located above the inner sides of the two edges of the conveyor belt (19).

6. The automatic adjustment device for a conveyor belt according to claim 1, characterized in that: The No. 1 external sensor (A1), No. 1 middle sensor (B1), No. 1 inner sensor (C1), No. 2 external sensor (A2), No. 2 middle sensor (B2), and No. 2 inner sensor (C2) are interlocked and controlled by a PLC control system.

7. The automatic conveyor belt adjustment device according to claim 3, characterized in that: The upper proximity switch (13) and the lower proximity switch (14) are interlocked with the first motor (1) and the second motor (2), and are controlled by a PLC control system.

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