Bucket wheel chain automatic tensioning device applied to bridge type material taking machine

Abstract

The invention discloses an automatic tensioning device applied to a bridge type material taking machine bucket wheel chain, and relates to the technical field of bulk material loading and unloading mechanical equipment, and the device comprises a chain, a driving chain wheel, a driven chain wheel, a driving device, a first tensioning roller, a second tensioning roller, a first tensioning oil cylinder, a second tensioning oil cylinder, a hydraulic system and an energy accumulator. When the driving chain wheel rotates anticlockwise, the hydraulic system controls the first tensioning oil cylinder to stretch out, the left loose edge is dynamically tensioned through the first tensioning roller, and the energy accumulator supplements oil in real time to maintain pressure; meanwhile, the second tensioning roller presses the right side tight edge through gravity, and jumping and tooth disengaging are prevented. When the driving chain wheel rotates clockwise, the second tensioning oil cylinder tensions the right loose edge, and the first tensioning roller presses the left tight edge through gravity. According to the device, through cooperative control of the hydraulic system and the energy accumulator, automatic switching of bucket wheel reversing elastic edges and tensioning force stability are achieved, the problem of tooth disengagement caused by low manual adjustment efficiency and chain looseness is solved, and the unmanned operation requirement of an automatic stock ground is met.

Description

Technical Field

[0001] The present invention relates to the technical field of bulk material loading and unloading mechanical equipment, and in particular to an automatic tensioning device for a bucket wheel chain of a bridge-type reclaimer. Background Art

[0002] In bulk material loading and unloading scenarios such as steel mills, docks, and mines, the bucket wheel drive system of bridge-type reclaimers generally adopts a chain transmission structure, which realizes the forward and reverse rotation of the bucket wheel through bidirectional drive. However, there are significant defects in the existing technology: when the bucket wheel rotates in one direction, one side of the chain is the tight side and the other side is the loose side; when the bucket wheel changes direction, the original tight side and loose side are swapped. In addition, after long-term operation, the chain gradually loosens due to factors such as wear and vibration, resulting in problems such as insufficient tension on the tight side and sagging on the loose side. Traditional solutions rely on manual adjustment of the tensioning device, but it is inefficient and has lag. Especially when the bucket wheel changes direction frequently, the instantaneous relaxation of the loose side can easily cause faults such as tooth stripping and chain jumping, which seriously threatens the operating stability and service life of the equipment.

[0003] While existing hydraulic tensioning technology can partially alleviate the problem of chain slack, it's primarily designed for unidirectional drive scenarios and lacks the dynamic requirements of bidirectional drive. Specifically, the unidirectional tensioning device requires manual switching of control logic during direction changes, resulting in lengthy downtime and adjustment times. Furthermore, the existing system lacks a dynamic pressure compensation mechanism, and the tensioning cylinder is susceptible to pressure fluctuations under vibration and impact, further exacerbating the risk of chain sagging. These issues not only limit the equipment's ability to operate continuously but also make it difficult to meet the unmanned, high-reliability requirements of automated material yards.

[0004] Therefore, there is an urgent need for an automatic chain tensioning device that can adapt to the bidirectional drive of the bucket wheel to solve technical bottlenecks such as low efficiency of manual intervention, discontinuous chain tension switching during reversing, and lack of dynamic pressure compensation, thereby improving the automation level and operation stability of the equipment. Summary of the Invention

[0005] To address the aforementioned technical issues, an automatic chain tensioning device for the bucket wheel of a bridge-type reclaimer is provided. This device utilizes a hydraulic system and an accumulator to coordinate control of a bidirectional tensioning cylinder, combined with a gravity roller to automatically adjust the chain's tight edge, achieving dynamic adaptive tensioning during bidirectional bucket wheel drive.

[0006] To achieve the above-mentioned object, the present invention provides an automatic chain tensioning device for a bucket wheel of a bridge-type reclaimer, comprising: a chain, a driving sprocket, a driven sprocket, a driving device, a first tensioning roller, a second tensioning roller, a first tensioning oil cylinder, a second tensioning oil cylinder, a hydraulic system, and an accumulator;

[0007] The driving sprocket is mechanically connected to the driving device, and the driving device rotates in both directions to drive the driving sprocket to run in both directions. The chain connects the driving sprocket and the driven sprocket to transmit power;

[0008] The hydraulic system is connected to the accumulator, the first tensioning oil cylinder and the second tensioning oil cylinder respectively, and controls the extension and retraction of the first tensioning oil cylinder and the second tensioning oil cylinder through the solenoid valve;

[0009] When the driving sprocket rotates counterclockwise, the first tensioning roller side is in tensioning state, and the second tensioning roller side is in non-tensioning state. The hydraulic system controls the first tensioning cylinder to extend, and the loose side of the chain is tensioned through the first tensioning roller. At the same time, the accumulator replenishes oil to the first tensioning cylinder, and the second tensioning roller is pressed against the tight side of the chain by gravity.

[0010] When the driving sprocket rotates clockwise, the first tensioning roller side is in a non-tensioned state, and the second tensioning roller side is in a tensioned state. The hydraulic system controls the second tensioning cylinder to extend, and the loose side of the chain is tensioned through the second tensioning roller. At the same time, the accumulator replenishes oil to the second tensioning cylinder, and the first tensioning roller is pressed against the tight side of the chain by gravity.

[0011] Furthermore, the hydraulic system includes a solenoid valve control module for switching the oil circuit on-off state between the first tensioning oil cylinder and the second tensioning oil cylinder, so that the tensioning oil cylinder that is not in operation is in a cut-off state.

[0012] Furthermore, when the accumulator vibrates or impacts during the operation of the chain, causing the pressure of the hydraulic system to drop, hydraulic oil is added to the corresponding tensioning cylinder to maintain the tensioning force.

[0013] Furthermore, in a non-tensioned state, the first tensioning roller and the second tensioning roller only rely on their own gravity to contact the tight side of the chain, thereby suppressing chain jumping and tooth stripping.

[0014] Furthermore, the first tensioning cylinder and the second tensioning cylinder are respectively connected to the hydraulic system through independently controlled hydraulic circuits to meet the switching requirements of the bucket wheel bidirectional drive.

[0015] Furthermore, the driving device is a bidirectional rotating motor or a hydraulic motor, which is used to drive the sprocket to realize forward and reverse rotation.

[0016] The present invention also provides a bridge-type reclaimer bucket wheel drive system, comprising the above-mentioned automatic chain tensioning device for the bridge-type reclaimer bucket wheel.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. The present invention provides an automatic chain tensioning device for the bucket wheel of a bridge-type reclaimer. Through the linkage control of the hydraulic system and the solenoid valve module, the first and second tensioning cylinders are automatically switched when the drive sprocket rotates forward and reverse, and the device acts precisely on the loose side of the chain, completely eliminating the lag of manual adjustment when the bucket wheel is reversing, and ensuring real-time adaptation of the chain tension under bidirectional drive conditions.

[0019] 2. The present invention provides an automatic tensioning device for the bucket wheel chain of a bridge-type material reclaimer. The accumulator is connected to the hydraulic system through a one-way oil replenishment circuit. When the pressure of the tensioning cylinder drops sharply due to chain vibration or impact, the hydraulic oil is instantly replenished to ensure that the tensioning force on the loose side is constant, avoiding the risks of tooth disengagement and chain jumping caused by pressure fluctuations in traditional hydraulic systems.

[0020] 3. The present invention provides an automatic tensioning device for the bucket wheel chain of a bridge-type reclaimer. The tensioning roller on the non-working side relies solely on the roller's own weight to fit the tight edge of the chain, thereby simultaneously suppressing lateral vibration and derailment, simplifying the complex driving mechanism of the traditional mechanical clamping device, and reducing energy consumption and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a structural schematic diagram of a tensioning device used in an automatic tensioning device for a bucket wheel chain of a bridge-type reclaimer when the device is running clockwise in an embodiment of the present invention;

[0023] Figure 2 This is a schematic structural diagram of a tensioning device used in an automatic tensioning device for a bucket wheel chain of a bridge-type reclaimer when running counterclockwise in an embodiment of the present invention.

[0024] In the figure: 1. Chain; 2. Driving sprocket; 3. Driven sprocket; 4. Driving device; 5. First tensioning roller; 6. Second tensioning roller; 7. First tensioning cylinder; 8. Second tensioning cylinder; 9. Hydraulic system; 10. Accumulator. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values described in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0029] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0030] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0031] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0032] like Figure 1 and Figure 2 As shown, the present invention provides an automatic tensioning device for a bucket wheel chain of a bridge-type reclaimer, comprising: a chain 1, a driving sprocket 2, a driven sprocket 3, a driving device 4, a first tensioning roller 5, a second tensioning roller 6, a first tensioning cylinder 7, a second tensioning cylinder 8, a hydraulic system 9, and an accumulator 10;

[0033] The driving sprocket 2 is mechanically connected to the driving device 4. The driving device 4 rotates in both directions to drive the driving sprocket 2 to run in both directions. The chain 1 connects the driving sprocket 2 and the driven sprocket 3 to transmit power.

[0034] The hydraulic system 9 is connected to the accumulator 10, the first tensioning cylinder 7 and the second tensioning cylinder 8 respectively, and controls the extension and retraction of the first tensioning cylinder 7 and the second tensioning cylinder 8 through the solenoid valve;

[0035] When the driving sprocket 2 rotates counterclockwise, the first tensioning roller 5 side is in tensioning state, and the second tensioning roller 6 side is in non-tensioning state. The hydraulic system 9 controls the first tensioning cylinder 7 to extend, and the loose side of the chain 1 is tensioned through the first tensioning roller 5. At the same time, the accumulator 10 replenishes oil to the first tensioning cylinder 7, and the second tensioning roller 6 is pressed against the tight side of the chain 1 by gravity.

[0036] When the driving sprocket 2 rotates clockwise, the first tensioning roller 5 side is in a non-tensioned state, and the second tensioning roller 6 side is in a tensioned state. The hydraulic system 9 controls the second tensioning cylinder 8 to extend, and the loose side of the chain 1 is tensioned through the second tensioning roller 6. At the same time, the accumulator 10 replenishes oil to the second tensioning cylinder 8, and the first tensioning roller 5 is pressed on the tight side of the chain 1 by gravity.

[0037] Furthermore, when the driving sprocket 2 rotates clockwise to drive the chain 1 to move, the first tensioning roller 5 side is in a tensioned state, and the second tensioning roller 6 side is in a non-tensioned state. At this time, the hydraulic system 9 controls the first tensioning cylinder 7 to extend through the first tensioning roller 5 to tension the chain 1. At the same time, the hydraulic system 9 replenishes oil to the accumulator 10. When the tension force decreases due to vibration and impact during the operation of the chain 1, the accumulator 10 can replenish oil to the first tensioning cylinder 7 in time to prevent the chain 1 from being too loose. The hydraulic system 9 is disconnected from the second tensioning cylinder 8 through the solenoid valve, and the second tensioning roller 6 is pressed on the tight side of the chain 1 only by its own gravity to prevent the tight side of the chain 1 from jumping and de-toothing.

[0038] Furthermore, when the driving sprocket 2 rotates counterclockwise to drive the chain 1 to move, the right side of the chain 1 is the tight side and the left side is the loose side. At this time, the hydraulic system 9 controls the second tensioning cylinder 8 to extend through the second tensioning roller 6 to tension the chain 1. At the same time, the hydraulic system 9 replenishes oil to the accumulator 10. When the tensioning force decreases due to vibration and impact during the operation of the chain 1, the accumulator 10 can replenish oil to the second tensioning cylinder 8 in time to prevent the loose side of the chain 1 from being too loose. The hydraulic system 9 is disconnected from the first tensioning cylinder 7 through the solenoid valve, and the first tensioning roller 5 is pressed on the tight side of the chain 1 only by its own gravity to prevent the tight side of the chain 1 from jumping and de-toothing.

[0039] Furthermore, the hydraulic system 9 includes a solenoid valve control module for switching the oil circuit on-off state between the first tensioning oil cylinder 7 and the second tensioning oil cylinder 8 so that the tensioning oil cylinder that is not in operation is in a cut-off state.

[0040] Furthermore, when the chain 1 vibrates or impacts during operation, causing the pressure of the hydraulic system 9 to drop, the accumulator 10 replenishes hydraulic oil to the corresponding tensioning cylinder to maintain the tensioning force.

[0041] Furthermore, in a non-tensioned state, the first tensioning roller 5 and the second tensioning roller 6 only rely on their own gravity to make close contact with the chain 1 , thereby preventing the chain 1 from jumping and de-toothing.

[0042] Furthermore, the first tensioning cylinder 7 and the second tensioning cylinder 8 are respectively connected to the hydraulic system 9 through independently controlled hydraulic circuits to meet the switching requirements of the bucket wheel bidirectional drive.

[0043] Furthermore, the driving device 4 is a bidirectional rotating motor or a hydraulic motor, which is used to drive the sprocket 2 to realize forward and reverse rotation.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic tensioning device for bucket wheel chains of bridge-type reclaimers, characterized in that: include: Chain, driving sprocket, driven sprocket, driving device, first tensioning roller, second tensioning roller, first tensioning cylinder, second tensioning cylinder, hydraulic system, accumulator; The driving sprocket is mechanically connected to the driving device, and the driving device rotates in both directions to drive the driving sprocket to run in both directions. The chain connects the driving sprocket and the driven sprocket to transmit power; The hydraulic system is connected to the accumulator, the first tensioning oil cylinder and the second tensioning oil cylinder respectively, and controls the extension and retraction of the first tensioning oil cylinder and the second tensioning oil cylinder through the solenoid valve; When the driving sprocket rotates counterclockwise, the first tensioning roller side is in tensioning state, and the second tensioning roller side is in non-tensioning state. The hydraulic system controls the first tensioning cylinder to extend, and the loose side of the chain is tensioned through the first tensioning roller. At the same time, the accumulator replenishes oil to the first tensioning cylinder, and the second tensioning roller is pressed against the tight side of the chain by gravity. When the driving sprocket rotates clockwise, the first tensioning roller side is in a non-tensioned state, and the second tensioning roller side is in a tensioned state. The hydraulic system controls the second tensioning cylinder to extend, and the loose side of the chain is tensioned through the second tensioning roller. At the same time, the accumulator replenishes oil to the second tensioning cylinder, and the first tensioning roller is pressed against the tight side of the chain by gravity.

2. The automatic chain tensioning device for bucket wheels of a bridge-type reclaimer according to claim 1 is characterized in that: The hydraulic system includes a solenoid valve control module for switching the oil circuit on-off state between the first tensioning oil cylinder and the second tensioning oil cylinder, so that the tensioning oil cylinder that is not in operation is in a cut-off state.

3. The automatic chain tensioning device for bucket wheels of a bridge-type reclaimer according to claim 1 is characterized in that: When the accumulator vibrates or impacts during the operation of the chain, causing the pressure of the hydraulic system to drop, the accumulator replenishes hydraulic oil to the corresponding tensioning cylinder to maintain the tensioning force.

4. The automatic chain tensioning device for bucket wheels of a bridge-type reclaimer according to claim 1 is characterized in that: In a non-tensioned state, the first tensioning roller and the second tensioning roller only rely on their own gravity to contact the tight side of the chain, thereby preventing the chain from jumping and de-toothing.

5. The automatic chain tensioning device for bucket wheels of a bridge-type reclaimer according to claim 1 is characterized in that: The first tensioning oil cylinder and the second tensioning oil cylinder are respectively connected to the hydraulic system through independently controlled hydraulic circuits to meet the switching requirements of the bucket wheel bidirectional drive.

6. The automatic chain tensioning device for bucket wheels of a bridge-type reclaimer according to claim 1 is characterized in that: The driving device is a bidirectional rotating motor or a hydraulic motor, which is used to drive the sprocket to realize forward and reverse rotation.

7. A bucket wheel drive system for a bridge-type reclaimer, comprising an automatic chain tensioning device for a bucket wheel of a bridge-type reclaimer according to any one of claims 1 to 6.

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