Tail tensioning mechanism of plate chain bucket elevator

Abstract

The utility model discloses a plate chain bucket elevator tail tensioning mechanism which comprises a hydraulic driving mechanism, two tensioning cross beams, two elastic supporting mechanisms and two connecting rods, the hydraulic driving mechanism comprises two hydraulic cylinders, the elastic supporting mechanisms are arranged at the front ends of the tensioning cross beams, and the two connecting rods are connected with the two elastic supporting mechanisms. The two hydraulic cylinders drive the two elastic supporting mechanisms respectively, the rear ends of the two tensioning cross beams are hinged to the tail machine shell and located on the two corresponding sides of the tail machine shell respectively, and the two tensioning cross beams are hinged to two installation sliding bases through two connecting rods respectively, and the two installation sliding bases are used for installing a tail wheel. The chains on the two sides can be uniformly stressed, so that uniform abrasion is ensured; and the tensioning force does not need to be manually adjusted, so that the workload of operators is reduced, the maintenance operation is convenient, and the polygon effect is effectively compensated.

Description

Technical Field

[0001] This utility model relates to the technical field of bucket elevators, and in particular to a tail tensioning mechanism for a plate chain bucket elevator. Background Technology

[0002] The tail tensioning device is the main component for tensioning the conveyor belt of a bucket elevator. It generally adopts either spiral tensioning or counterweight tensioning.

[0003] The main drawbacks of the spiral tensioning method are: 1) When the lifting belt wears and stretches to a certain extent, it is necessary to adjust the screw downwards to maintain contact between the lifting belt and the lower idler wheel, which is troublesome due to frequent adjustments; 2) During the adjustment process, the tension is uncontrollable: if the tension is too low, it is easy to cause belt slippage; if the tension is too high, on the one hand, it will cause excessive bending moment of the tail shaft, resulting in rotational fatigue and breakage, and on the other hand, it will cause excessive tensile stress of the lifting belt, resulting in belt breakage. Especially when the elevator encounters strong impact force during feeding, it is very likely to cause shaft breakage or belt breakage accidents. At the same time, the overall running resistance is high and the energy consumption is high.

[0004] The main defects of the counterweight tensioning device are: 1) Since the tension force depends on adding or removing counterweights, at least the weight of one counterweight is required each time the tension force is adjusted, resulting in poor precision in tension force adjustment; 2) During maintenance, the counterweight must be removed, which is inconvenient, time-consuming, inefficient, and costly. Summary of the Invention

[0005] The purpose of this invention is to solve the problems in the prior art by proposing a tail tensioning mechanism for a plate chain bucket elevator, which can solve at least one of the above problems.

[0006] To achieve the above objectives, this utility model proposes a tail tensioning mechanism for a plate chain bucket elevator, comprising a hydraulic drive mechanism, two tensioning beams, two elastic support mechanisms, and two connecting rods. The hydraulic drive mechanism includes two hydraulic cylinders. The front ends of the tensioning beams are each provided with an elastic support mechanism. The two hydraulic cylinders drive the two elastic support mechanisms respectively. The rear ends of the two tensioning beams are hinged to the tail housing and are located on corresponding sides of the tail housing. The two tensioning beams are hinged to two mounting slides for mounting the tail wheel via two connecting rods.

[0007] Preferably, the hydraulic drive mechanism further includes a hydraulic pump, the input end of which is connected to a hydraulic oil tank, and the output end of which is connected to two hydraulic cylinders respectively through two oil pipes I. Each oil pipe is sequentially equipped with a check valve I and a pressure transmitter.

[0008] Preferably, a two-position two-way solenoid valve is provided on the oil pipe I between the output end of the hydraulic pump and the one-way valve I.

[0009] Preferably, a manual pressure relief valve is also included. The input end of the manual pressure relief valve is connected to the output end of two check valves I via two oil pipes II, and each oil pipe I is equipped with a check valve II.

[0010] Preferably, the tail section housing is provided with a cylinder mounting bracket, and the cylinder mounting bracket is provided with a hydraulic cylinder.

[0011] Preferably, the elastic support mechanism includes a guide sleeve, a sliding seat, and a spring, wherein the guide sleeve contains the spring and the sliding seat located at the upper end of the spring.

[0012] Preferably, the lower end of the sliding seat is provided with a positioning sleeve fitted on the spring, and the lower end of the guide sleeve is provided with a limiting body located inside the spring.

[0013] The beneficial effects of this utility model are as follows: This utility model provides tension to the two tension beams through two hydraulic cylinders, ensuring that the chain on both sides is subjected to uniform force, thereby ensuring uniform wear; and it does not require manual adjustment of tension, thereby reducing the workload of operators and making maintenance and operation convenient; since the chain has a polygonal effect during the meshing and operation of the tail pulley, the tail end will jump up and down, and the elastic support mechanism effectively compensates for the polygonal effect.

[0014] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the tail tensioning mechanism of a plate chain bucket elevator according to the present invention;

[0016] Figure 2 This is a front view of the tail tensioning mechanism of a plate chain bucket elevator according to this utility model;

[0017] Figure 3 yes Figure 1 Enlarged view of A in the middle;

[0018] Figure 4 A schematic diagram of the hydraulic drive mechanism.

[0019] In the diagram: 1-Hydraulic drive mechanism, 2-Tensioning crossbeam, 3-Elastic support mechanism, 4-Connecting rod, 5-Tail housing, 6-Mounting slide, 10-Oil pipe I, 11-Hydraulic cylinder, 12-Hydraulic pump, 13-Oil pipe, 14-Check valve I, 15-Pressure transmitter, 16-Two-position two-way solenoid valve, 17-Manual pressure relief valve, 18-Oil pipe II, 19-Check valve II, 110-Oil cylinder mounting bracket, 31-Guide sleeve, 32-Sliding seat, 33-Spring, 34-Positioning sleeve, 35-Limiting body. Detailed Implementation

[0020] See Figure 1 , Figure 2 , Figure 3 and Figure 4 This utility model discloses a tail tensioning mechanism for a plate chain bucket elevator, comprising a hydraulic drive mechanism 1, two tensioning beams 2, two elastic support mechanisms 3, and two connecting rods 4. The hydraulic drive mechanism 1 includes two hydraulic cylinders 11. The front end of each tensioning beam 2 is provided with an elastic support mechanism 3. The two hydraulic cylinders 11 drive the two elastic support mechanisms 3 respectively. The rear ends of each tensioning beam 2 are hinged to the tail housing 5 and are located on corresponding sides of the tail housing 5 respectively. The two tensioning beams 2 are hinged to two mounting slides 6 for mounting the tail wheel via the two connecting rods 4 respectively.

[0021] The hydraulic drive mechanism 1 also includes a hydraulic pump 12. The input end of the hydraulic pump 12 is connected to the hydraulic oil tank 13. The output end of the hydraulic pump 12 is connected to two hydraulic cylinders 11 through two oil pipes I10 respectively. Each oil pipe 13 is provided with a one-way valve I14 and a pressure transmitter 15 in sequence.

[0022] Two-position two-way solenoid valves 16 are provided on the oil pipe I10 between the output end of the hydraulic pump 12 and the one-way valve I14.

[0023] It also includes a manual pressure relief valve 17, the input end of which is connected to the oil pipe I10 at the output end of two one-way valves I14 via two oil pipes II18, and each oil pipe I10 is equipped with a one-way valve II19.

[0024] The tail housing 5 is provided with a cylinder fixing bracket 110, and the cylinder fixing bracket 20 is provided with a hydraulic cylinder 11.

[0025] The elastic support mechanism 3 includes a guide sleeve 31, a sliding seat 32, and a spring 33. The guide sleeve 31 contains the spring 33 and the sliding seat 32 located at the upper end of the spring 33.

[0026] The lower end of the sliding seat 32 is provided with a positioning sleeve 34 sleeved on the spring 33, and the lower end of the guide sleeve 31 is provided with a limiting body 35 located inside the spring 33.

[0027] The working process of this utility model:

[0028] In the operation of this utility model, a tensioning mechanism for the tail end of a plate chain bucket elevator is described. The two-position, two-way solenoid valve 16 is opened, and then the hydraulic pump 12 is started. The hydraulic pump 12 pumps hydraulic oil from the hydraulic oil tank 13 into the hydraulic cylinder 11. Under the action of the hydraulic oil, the hydraulic cylinder 11 pushes the sliding seat 32 downwards. The sliding seat 32, through the spring 33, drives the tensioning beam 2 to rotate counterclockwise. The tensioning beam 2, through the connecting rod 4, pulls the mounting slide 6 downwards. The mounting slide 6 drives the tail wheel downwards to tension the plate chain. When the pressure transmitter 15 detects that the pressure has reached the set value, the hydraulic pump 12 is stopped and the two-position, two-way solenoid valve 16 is closed.

[0029] By detecting the hydraulic oil pressure in the oil pipe I10 through the pressure transmitter 15, the hydraulic oil pressure of the hydraulic cylinder 11 can be effectively controlled, thereby enabling precise control of the tensioning force of the tensioning beam 2.

[0030] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A tail tensioning mechanism for a plate chain bucket elevator, characterized by: It includes hydraulic drive mechanism (1), two tension beams (2), two elastic support mechanism (3) and two connecting rods (4), the hydraulic drive mechanism (1) includes two hydraulic cylinders (11), the front end of the tension beam (2) is provided with elastic support mechanism (3), two hydraulic cylinders (11) drive two elastic support mechanism (3) respectively, the rear end of two tension beams (2) is hinged connection with tail casing (5) and is located at the corresponding two sides of tail casing (5) respectively, two tension beams (2) are hinged connection with two mounting slides (6) for mounting tail wheel through two connecting rods (4) respectively.

2. A tail tensioning mechanism for a plate chain bucket elevator as claimed in claim 1, characterized in that: The hydraulic drive mechanism (1) further comprises a hydraulic pump (12), the input end of the hydraulic pump (12) is communicated with the hydraulic oil tank (13), the output end of the hydraulic pump (12) is communicated with two hydraulic cylinders (11) through two oil pipes I (10) respectively, the oil pipe (13) is provided with unidirectional valve I (14) and pressure transmitter (15) in sequence.

3. A tail tensioning mechanism for a plate chain bucket elevator as claimed in claim 2, characterised in that: The oil pipe I (10) between the output end of the hydraulic pump (12) and unidirectional valve I (14) is provided with two-position two-way electromagnetic valve (16).

4. A tail tensioning mechanism for a plate chain bucket elevator as set forth in claim 2, characterized in that: It further comprises a manual pressure relief valve (17), the input end of the manual pressure relief valve (17) is communicated with the oil pipe I (10) of the output end of two unidirectional valve I (14) through two oil pipes II (18), the oil pipe I (10) is provided with unidirectional valve II (19).

5. A tail tensioning mechanism for a plate chain bucket elevator as set forth in claim 1, characterized in that: The tail casing (5) is provided with oil cylinder fixing frame (110), the oil cylinder fixing frame (20) is provided with hydraulic cylinder (11).

6. A tail tensioning mechanism for a plate chain bucket elevator as set forth in claim 1, characterized in that: The elastic support mechanism (3) includes guide sleeve (31), sliding seat (32) and spring (33), the guide sleeve (31) is provided with spring (33) and sliding seat (32) located at the upper end of spring (33) in.

7. A tail tensioning mechanism for a plate chain bucket elevator as claimed in claim 6, characterised in that: The lower end of the sliding seat (32) is provided with positioning sleeve (34) sleeved on the spring (33), the lower end of the guide sleeve (31) is provided with limiting body (35) located in the spring (33).

Images