Tail tensioning mechanism capable of achieving accurate tensioning for rubber belt bucket elevator

Abstract

The invention discloses a belt bucket elevator tail tensioning mechanism capable of realizing accurate tensioning, which comprises a driving mechanism, a sliding mechanism and a roller mounting mechanism, the roller mounting mechanism is arranged on the sliding mechanism, and the sliding mechanism drives the roller mounting mechanism to move downwards under the driving action of the driving mechanism. The driving mechanism comprises a driving cylinder, a pressure transmitter, a rotating arm, a hydraulic pump, a hydraulic oil tank and a one-way valve, the driving end of the driving cylinder is hinged to the front end of the rotating arm, the rear end of the rotating arm drives the sliding mechanism, and the hydraulic oil tank, the hydraulic pump, the one-way valve, the pressure transmitter and the driving cylinder are sequentially installed on the pipeline. And the workload of operators can be relieved, the tensioning force accuracy is good, the tensioning force can be adjusted in real time, and overhauling is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of bucket elevators, in particular to a tail tensioning mechanism of a belt bucket elevator capable of realizing precise tensioning. Background Art

[0002] The tail tensioning device is the main component for tensioning the lifting belt of bucket elevator equipment, and generally adopts spiral tensioning or heavy hammer tensioning.

[0003] The main defects of the spiral tensioning form are: 1) When the lifting belt is worn and stretched to a certain extent, it is necessary to adjust the screw rod to press down to keep the lifting belt in contact with the lower redirecting wheel, and frequent adjustments are very troublesome; 2) During the adjustment process, the tensioning force is uncontrollable: Too little tensioning force can easily cause belt slippage; too much tensioning force will cause excessive bending moment of the tail shaft and rotational fatigue to cause fracture, and on the other hand, it will cause excessive tensile stress in the lifting belt and cause belt breakage. Especially when encountering a strong impact force during the feeding of the elevator, it is likely to cause shaft or belt breakage accidents. At the same time, the whole machine has large running resistance and high energy consumption.

[0004] The main defects of the weight tensioning device are: 1) Although the tensioning force is constant, the lifting belt often slips due to insufficient tension when the elevator is started instantly or when the feed volume changes suddenly; 2) During maintenance, the weight block needs to be removed, which is inconvenient, time-consuming, inefficient and costly. Summary of the invention

[0005] The purpose of the present invention is to solve the problems in the prior art and to provide a belt bucket elevator tail tensioning mechanism that can achieve precise tensioning, which can solve at least one of the above problems.

[0006] To achieve the above-mentioned purpose, the present invention proposes a tail tensioning mechanism of a belt bucket elevator that can achieve precise tensioning, including a driving mechanism, a sliding mechanism and a roller mounting mechanism, wherein the sliding mechanism is provided with a roller mounting mechanism, and the sliding mechanism drives the roller mounting mechanism to move downward under the driving action of the driving mechanism, and the driving mechanism includes a driving cylinder, a pressure transmitter, a rotating arm, a hydraulic pump, a hydraulic oil tank and a one-way valve, the driving end of the driving cylinder is hingedly connected to the front end of the rotating arm, and the rear end of the rotating arm drives the sliding mechanism, and the hydraulic oil tank, hydraulic pump, one-way valve, pressure transmitter and driving cylinder are installed on the pipeline in sequence.

[0007] Preferably, a rotating shaft is provided on the rotating arm, and the rotating shaft is arranged on the tail casing through a plurality of bearing seats.

[0008] Preferably, the distance between the front end of the rotating arm and the rotating shaft is greater than the distance between the rear end of the rotating arm and the rotating shaft.

[0009] Preferably, a hinged support is provided at the rear end of the rotating arm, and support rollers are provided at both ends of the support.

[0010] Preferably, the sliding mechanism includes a sliding shaft and a guide sleeve, the sliding shaft is arranged inside the guide sleeve, the guide sleeve is arranged on the tail casing, a sealing sleeve is arranged between the sliding shaft and the inspection cover, and the upper end of the sliding shaft is provided with a seat body supported on the lower end of the supporting roller.

[0011] Preferably, the roller mounting mechanism is a mounting seat rotatably connected to the roller of the tape roller.

[0012] Preferably, the roller mounting mechanism comprises a mounting sleeve, a guide shaft, a block body, a ball guide sleeve, a spring, a ball head seat, a ball head and a bearing, a ball guide sleeve is provided in the rear end of the mounting sleeve, a guide shaft is provided in the ball guide sleeve, a block body is provided at the front end of the guide shaft, a spring is provided on the guide shaft between the block body and the ball guide sleeve, a ball head seat is provided at the outer end of the guide shaft, a ball head is provided in the rear end of the ball head seat, and a bearing is provided at the outer end of the ball head for mounting the tape roller.

[0013] Preferably, the mounting sleeve and the inspection cover are slidably connected via a roller guide rail.

[0014] Beneficial effects of the present invention: the present invention drives the roller installation mechanism to move downward under the driving action of the driving mechanism, the driving end of the driving cylinder is hingedly connected to the front end of the rotating arm, the rear end of the rotating arm drives the sliding mechanism, the hydraulic oil tank, the hydraulic pump, the one-way valve, the pressure transmitter and the driving cylinder are installed on the pipeline in sequence, the rear end of the rotating arm drives the sliding mechanism, the driving cylinder is used to transmit the tensioning force through the rotating arm, and the hydraulic control of the hydraulic pump can accurately control the tensioning force on both sides, thereby reducing the workload of the operator; compared with the prior art, it can reduce the workload of the operator, the tensioning force has good accuracy, and the tensioning force can be adjusted in real time, which is convenient for maintenance.

[0015] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a tensioning mechanism at the tail of a belt bucket elevator capable of realizing precise tensioning according to the present invention; Figure 2 It is a side view of a tensioning mechanism at the tail of a belt bucket elevator capable of realizing precise tensioning according to the present invention; Figure 3 yes Figure 1 A magnified view of middle; Figure 4 It is a partial structural diagram of the driving mechanism; Figure 5 It is a structural schematic diagram of the roller mounting mechanism; Figure 6 It is a schematic diagram of the tension force applied to the corresponding end of the tape roller when the tape is adjusted to the right; Figure 7 It is a schematic diagram showing the tensioning force applied to the corresponding end of the tape roller when the tape is adjusted to the left.

[0017] In the figure: 1-driving mechanism, 2-sliding mechanism, 3-roller mounting mechanism, 4-tail casing, 5-inspection cover, 6-tape roller, 7-roller guide, 11-driving cylinder, 12-pressure transmitter, 13-rotating arm, 14-rotating shaft, 15-bearing seat, 16-support roller, 17-hydraulic pump, 18-hydraulic oil tank, 19-support, 110-, one-way valve, 21-sliding shaft, 22-guide sleeve, 23-sealing sleeve, 24-seat body, 31-mounting sleeve, 32-guide shaft, 33-block body, 34-ball guide sleeve, 35-spring, 36-ball head seat, 37-ball head, 38-bearing. DETAILED DESCRIPTION

[0018] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The present invention discloses a tail tensioning mechanism of a belt bucket elevator capable of realizing precise tensioning, comprising a driving mechanism 1, a sliding mechanism 2 and a roller mounting mechanism 3. The sliding mechanism 2 is provided with the roller mounting mechanism 3. The sliding mechanism 2 drives the roller mounting mechanism 3 to move downward under the driving action of the driving mechanism 1. The driving mechanism 1 comprises a driving cylinder 11, a pressure transmitter 12, a rotating arm 13, a hydraulic pump 17, a hydraulic oil tank 18 and a one-way valve 110. The driving end of the driving cylinder 11 is hingedly connected to the front end of the rotating arm 13. The rear end of the rotating arm 13 drives the sliding mechanism 2. The hydraulic oil tank 18, the hydraulic pump 17, the one-way valve 110, the pressure transmitter 12 and the driving cylinder 11 are sequentially installed on the pipeline.

[0019] The rotating arm 13 is provided with a rotating shaft 14 , and the rotating shaft 14 is arranged on the tail casing 4 through a plurality of bearing seats 15 .

[0020] The distance between the front end of the rotating arm 13 and the rotating shaft 14 is greater than the distance between the rear end of the rotating arm 13 and the rotating shaft 14 .

[0021] A hinged support 19 is provided at the rear end of the rotating arm 13 , and support rollers 16 are provided at both ends of the support 19 .

[0022] The sliding mechanism 2 includes a sliding shaft 21 and a guide sleeve 22. The sliding shaft 21 is arranged inside the guide sleeve 22. The guide sleeve 22 is arranged on the tail casing 4. A sealing sleeve 23 is arranged between the sliding shaft 21 and the inspection cover 5. The upper end of the sliding shaft 21 is provided with a seat body 24 supported on the lower end of the supporting roller 16.

[0023] The roller mounting mechanism 3 is a mounting seat rotatably connected to the roller of the tape roller 6 .

[0024] The roller mounting mechanism 3 includes a mounting sleeve 31, a guide shaft 32, a stopper 33, a ball guide sleeve 34, a spring 35, a ball head seat 36, a ball head 37 and a bearing 38. The rear end of the mounting sleeve 31 is provided with a ball guide sleeve 34, the ball guide sleeve 34 is provided with a guide shaft 32, the front end of the guide shaft 32 is provided with a stopper 33, the guide shaft 32 between the stopper 33 and the ball guide sleeve 34 is sleeved with a spring 35, the outer end of the guide shaft 32 is provided with a ball head seat 36, the rear end of the ball head seat 36 is provided with a ball head 37, and the outer end of the ball head 37 is provided with a bearing 38 for mounting the tape roller 6.

[0025] The installation sleeve 31 and the inspection cover 5 are slidably connected via a roller guide rail 7 .

[0026] Working process of the present invention: In the working process of the tail tensioning mechanism of the belt bucket elevator of the present invention which can realize precise tensioning, the hydraulic oil in the hydraulic oil tank 18 is acted by the hydraulic pump 17, passes through the one-way valve 110 and the pressure transmitter 12 in sequence, and finally enters the driving cylinder 11. The driving cylinder 11 drives the rotating arm 13 to rotate clockwise. The rotating arm 13 drives the sliding shaft 21 to move downward through the cooperation of the support 19, the supporting roller 16 and the seat body 24. The sliding shaft 21 drives the roller installation mechanism 3 to move downward. The roller installation mechanism 3 drives the tape roller to move downward to tension the tape.

[0027] A support 19 is hingedly connected to the rear end of the rotating arm 13, and support rollers 16 are provided at both ends of the support 19. The upper end of the sliding shaft 21 is provided with a seat body 24 supported on the lower end of the support roller 16. In this way, the force acting on the sliding shaft 21 is always vertically downward, which reduces the wear of the sliding shaft 21 and improves the transmission flexibility, thereby avoiding the disadvantages caused by the rear end of the rotating arm 13 directly pressing down the sliding shaft 21.

[0028] The design of the roller mounting mechanism 3 satisfies the movable connection required for adjusting the tension force at the corresponding ends of the tape roller 6. In this way, when the tape is offset, the tension force can be increased separately at the corresponding ends of the tape roller to reset the tape and adjust it to the middle position of the tape roller.

[0029] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. A belt bucket elevator tail tensioning mechanism capable of achieving precise tensioning, characterized in that: The invention comprises a driving mechanism (1), a sliding mechanism (2) and a roller mounting mechanism (3); the sliding mechanism (2) is provided with the roller mounting mechanism (3); the sliding mechanism (2) drives the roller mounting mechanism (3) to move downward under the driving action of the driving mechanism (1); the driving mechanism (1) comprises a driving cylinder (11), a pressure transmitter (12), a rotating arm (13), a hydraulic pump (17), a hydraulic oil tank (18) and a one-way valve (110); the driving end of the driving cylinder (11) is hingedly connected to the front end of the rotating arm (13); the rear end of the rotating arm (13) drives the sliding mechanism (2); and the hydraulic oil tank (18), the hydraulic pump (17), the one-way valve (110), the pressure transmitter (12) and the driving cylinder (11) are sequentially mounted on a pipeline.

2. A belt bucket elevator tail tensioning mechanism capable of achieving precise tensioning as claimed in claim 1, characterized in that: The rotating arm (13) is provided with a rotating shaft (14), and the rotating shaft (14) is arranged on the tail casing (4) via a plurality of bearing seats (15).

3. The tail tensioning mechanism of the belt bucket elevator capable of achieving precise tensioning as claimed in claim 1, characterized in that: The distance between the front end of the rotating arm (13) and the rotating shaft (14) is greater than the distance between the rear end of the rotating arm (13) and the rotating shaft (14).

4. The tail tensioning mechanism of the belt bucket elevator capable of achieving precise tensioning as claimed in claim 1, characterized in that: A hinged support (19) is provided at the rear end of the rotating arm (13), and support rollers (16) are provided at both ends of the support (19).

5. A belt bucket elevator tail tensioning mechanism capable of achieving precise tensioning as claimed in claim 4, characterized in that: The sliding mechanism (2) comprises a sliding shaft (21) and a guide sleeve (22), wherein the sliding shaft (21) is arranged inside the guide sleeve (22), the guide sleeve (22) is arranged on the tail casing (4), a sealing sleeve (23) is arranged between the sliding shaft (21) and the inspection cover (5), and a seat body (24) supported on the lower end of the support roller (16) is arranged at the upper end of the sliding shaft (21).

6. A belt bucket elevator tail tensioning mechanism capable of achieving precise tensioning as claimed in claim 5, characterized in that: The roller mounting mechanism (3) is a mounting seat rotatably connected to the roller of the tape roller (6).

7. A belt bucket elevator tail tensioning mechanism capable of achieving precise tensioning as claimed in claim 6, characterized in that: The mounting seat comprises a mounting sleeve (31), a guide shaft (32), a stopper (33), a ball guide sleeve (34), a spring (35), a ball head seat (36), a ball head (37) and a bearing (38); a ball guide sleeve (34) is arranged inside the rear end of the mounting sleeve (31); a guide shaft (32) is arranged inside the ball guide sleeve (34); a stopper (33) is arranged at the front end of the guide shaft (32); a spring (35) is sleeved on the guide shaft (32) between the stopper (33) and the ball guide sleeve (34); a ball head seat (36) is arranged at the outer end of the guide shaft (32); a ball head (37) is arranged inside the rear end of the ball head seat (36); and a bearing (38) is arranged inside the outer end of the ball head (37) for mounting the tape roller (6).

8. The tail tensioning mechanism of the belt bucket elevator capable of achieving precise tensioning as claimed in claim 7, characterized in that: The mounting sleeve (31) and the inspection cover (5) are slidably connected via a roller guide rail (7).

Images