Scraper chain tensioning adjusting structure

Abstract

The utility model discloses a scraper chain tensioning adjusting structure, including scraper, be provided with adjusting assembly on the scraper, be provided with tensioning assembly on adjusting assembly. Adjusting assembly includes the L shaped support frame of installation in the scraper casing outside, the servo electric push -rod is installed in the L shaped support frame on the penetration, and the telescopic end of servo electric push -rod is connected with the U shaped mounting bracket through pressure sensor, and the bottom of U shaped mounting bracket is installed with mounting panel. The utility model discloses through adjusting assembly and tensioning assembly, can select corresponding length mounting panel, and the round hole bolt is fixed to adapt to different installation size, according to scraper single track, double track and many double tracks, install single, double or multiple tensioning assembly, improve flexibility and adaptability, reduce the difficulty of adaptation, and pressure sensor real -time monitoring servo electric push -rod thrust, indirectly reflect the tensioning force, provide the adjustment data reference, avoid the equipment failure, improve the adjustment accuracy.

Description

Technical Field

[0001] This utility model mainly relates to the field of scraper conveyor technology, specifically a scraper chain tension adjustment structure. Background Technology

[0002] In industrial fields such as mining, coal transportation, and building materials processing, scraper conveyors are the core equipment for continuous conveying of bulk materials. Their operational stability directly determines production efficiency and operational safety. As a key component for power transmission and material carrying in scraper conveyors, the scraper chain must always maintain a reasonable tension. If the tension is insufficient, chain slack, chain skipping, and chain jamming are likely to occur, which may even lead to chain breakage and shutdown in severe cases. If the tension is excessive, it will aggravate the wear of the chain and sprockets, shorten the service life of components, and increase the energy consumption of the drive system.

[0003] Currently, scraper chain tension adjustment is mostly done manually or with hydraulic cylinders. Manual adjustment requires stopping the machine, has low accuracy, and is time-consuming and labor-intensive, making it difficult to meet the needs of continuous production. Traditional hydraulic adjustment structures suffer from problems such as delayed adjustment response. Moreover, both manual and traditional hydraulic adjustment structures lack flexibility and adaptability. When dealing with scraper conveyors of different specifications such as single-track, double-track, or multi-track, it is necessary to modify or replace the entire adjustment device, resulting in high adaptation costs, poor applicability, and difficulty in covering diverse working conditions. Utility Model Content

[0004] This utility model provides a solution that addresses the problem of overly simplistic existing technical solutions. It offers a significantly different approach by providing a scraper chain tension adjustment structure. This addresses the issues raised in the background section, where current scraper chain tension adjustments are mostly manual or hydraulic cylinder adjustments. Manual adjustments suffer from low precision, time-consuming and labor-intensive nature, making them unsuitable for continuous production. Traditional hydraulic adjustments also exhibit sluggish response. Furthermore, both methods lack flexibility and adaptability, requiring modification or replacement of the entire device for single-track, double-track, and multi-double-track scraper conveyors, resulting in high adaptation costs, poor applicability, and difficulty in covering diverse working conditions.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A scraper chain tension adjustment structure includes a scraper conveyor, an adjustment component on the scraper conveyor, and a tensioning component on the adjustment component.

[0007] The adjustment assembly includes an L-shaped support frame installed outside the scraper conveyor housing. A servo electric push rod is installed through the L-shaped support frame. The telescopic end of the servo electric push rod is connected to a U-shaped mounting frame via a pressure sensor. A mounting plate is installed at the bottom of the U-shaped mounting frame.

[0008] More preferably, the top of the L-shaped support frame is provided with symmetrically distributed sliding holes, and a sliding rod is slidably installed in each sliding hole, with one end of the sliding rod connected to the U-shaped mounting frame.

[0009] More preferably, the tensioning assembly includes an L-shaped mounting bracket, a sliding block is provided at the top of the L-shaped mounting bracket, a mounting rod is installed near the bottom of the L-shaped mounting bracket, and a tensioning wheel is rotatably connected to the outer wall of the mounting rod.

[0010] More preferably, the two ends of the U-shaped mounting bracket are provided with a number of evenly distributed circular holes, and the top of the mounting plate is provided with a number of circular holes corresponding to the circular holes on the U-shaped mounting bracket.

[0011] More preferably, the bottom of the mounting plate is provided with a groove that matches the sliding block, and the sliding block is slidably installed in the groove.

[0012] More preferably, the sliding block has multiple screw holes, and the top of the mounting plate has several evenly spaced screw holes.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] By adjusting the mounting plate and tensioning components, and selecting the appropriate mounting plate length based on the scraper chain of the scraper conveyor, the top circular hole of the mounting plate is aligned with the evenly spaced circular holes at both ends of the U-shaped mounting bracket and bolted in place. The mounting plate specifications can be flexibly changed according to the actual working conditions of the scraper conveyor to adapt to different installation size requirements. Furthermore, depending on whether the scraper conveyor is single-track, double-track, or multi-double-track, one, two, or multiple tensioning components are installed accordingly. The tensioning components are assembled through the sliding engagement of the sliding block and the mounting plate groove. Compared to the traditional top-down adjustment method, this improves the flexibility and adaptability of the overall structure, reduces the difficulty of adapting to different specifications of scraper conveyors, and allows for real-time monitoring of the servo electric push rod thrust through a pressure sensor. This indirectly reflects the tension force of the tensioning wheel on the scraper chain, providing data reference for tension adjustment, avoiding equipment failure caused by excessive or insufficient tension, and improving adjustment accuracy.

[0015] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is an enlarged structural schematic diagram of the adjustment component of this utility model;

[0018] Figure 3 This is an enlarged structural schematic diagram of the tensioning component of this utility model.

[0019] Numbering on the map:

[0020] 1. Scraper conveyor; 2. Adjustment assembly; 201. L-shaped support frame; 202. Servo electric push rod; 203. U-shaped mounting frame; 204. Slide rod; 205. Mounting plate; 3. Tensioning assembly; 301. L-shaped mounting frame; 302. Sliding block; 303. Mounting rod; 304. Tensioning wheel. Detailed Implementation

[0021] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0023] Please refer to the appendix carefully. Figures 1-3 A scraper chain tension adjustment structure includes a scraper conveyor 1, an adjustment component 2 on the scraper conveyor 1, and a tensioning component 3 on the adjustment component 2.

[0024] The adjustment assembly 2 includes an L-shaped support frame 201 installed on the outside of the scraper conveyor 1 housing. A servo electric push rod 202 is installed through the L-shaped support frame 201. The telescopic end of the servo electric push rod 202 is connected to a U-shaped mounting bracket 203 through a pressure sensor. A mounting plate 205 is installed at the bottom of the U-shaped mounting bracket 203. The servo electric push rod 202 has a built-in displacement sensor and an overload protection function.

[0025] The pressure sensor and the displacement sensor built into the servo electric actuator 202 are connected to the PLC control system. The system presets the tension target value, compares the actual thrust value fed back by the pressure sensor with the target value through a PID algorithm, and dynamically controls the extension and retraction of the servo electric actuator 202 to form a closed-loop control circuit, thereby realizing the automatic adjustment and maintenance of the tension.

[0026] It should be noted that the scraper conveyor 1 used in this utility model is an existing mature device. Therefore, the specific structure and working principle of the scraper conveyor 1 will not be elaborated in this article.

[0027] In this embodiment, as Figure 2As shown, the top of the L-shaped support frame 201 is provided with symmetrically distributed sliding holes, and a sliding rod 204 is slidably installed in each sliding hole. One end of the sliding rod 204 is connected to the U-shaped mounting frame 203. With the above structure, when the servo electric push rod 202 is started to drive the U-shaped mounting frame 203 to move up and down, the symmetrically distributed sliding holes on the top of the L-shaped support frame 201, together with the sliding rods 204, allow the U-shaped mounting frame 203 to slide stably along the direction of the sliding holes, thereby realizing the height adjustment of the U-shaped mounting frame 203. Telescopic protective tubes can be installed between the servo electric push rod 202 and the U-shaped mounting frame 203 and between the sliding rod 204 and the U-shaped mounting frame 203 to prevent impurities from entering and affecting the normal operation of the mechanism. The surface of the sliding rod 204 is chrome-plated, and a self-lubricating copper sleeve is embedded in the sliding hole to ensure the smoothness and wear resistance of the movement.

[0028] In this embodiment, as Figure 3 As shown, the tensioning assembly 3 includes an L-shaped mounting bracket 301. A sliding block 302 is provided on the top of the L-shaped mounting bracket 301. A mounting rod 303 is installed near the bottom of the L-shaped mounting bracket 301. A tensioning wheel 304 is rotatably connected to the outer wall of the mounting rod 303. The tensioning wheel 304 is matched with the scraper chain. Through the above structure, the mounting rod 303 near the bottom of the L-shaped mounting bracket 301 provides a mounting base for the tensioning wheel 304. The matching design of the tensioning wheel 304 and the scraper chain can fit the transmission trajectory of the scraper chain, ensuring that the tension force is applied to the scraper chain. The tensioning wheel 304 is rotatably connected to the mounting rod 303 through a self-aligning roller bearing. A labyrinth seal structure is provided on the outside of the bearing, and a grease injection hole is reserved to adapt to high dust conditions and extend service life.

[0029] In this embodiment, as Figure 2 As shown, the two ends of the U-shaped mounting bracket 203 are provided with several evenly spaced circular holes, and the top of the mounting plate 205 is provided with several circular holes corresponding to the circular holes on the U-shaped mounting bracket 203. With the above structure, the evenly spaced circular holes at the two ends of the U-shaped mounting bracket 203, together with the corresponding circular holes on the top of the mounting plate 205, can be used to fix the U-shaped mounting bracket 203 and the mounting plate 205 with bolts or other connecting parts. Subsequently, the mounting plate 205 can be disassembled and replaced with mounting plates 205 of different lengths according to the usage requirements.

[0030] In this embodiment, as Figure 2 and Figure 3 As shown, the bottom of the mounting plate 205 is provided with a groove that matches the sliding block 302, and the sliding block 302 is slidably installed in the groove. Through the above structure, the groove and the sliding block 302 form a stable sliding guide structure, which can limit the offset direction of the sliding block 302 and prevent it from wobbling or getting stuck during the sliding process. The position of the tensioning component 3 can be adjusted according to the usage requirements.

[0031] In this embodiment, as Figure 2 and Figure 3 As shown, the sliding block 302 has multiple screw holes, and the top of the mounting plate 205 has several evenly spaced screw holes. With the above structure, when the position of the tensioning component 3 is adjusted, after the sliding block 302 is adjusted to the predetermined position along the slide groove, it is fixed by bolts passing through the corresponding screw holes. The evenly spaced screw holes provide multiple fixing points, which can meet the position locking requirements of the sliding block 302 under different working conditions and improve the flexibility of adjustment.

[0032] The specific operating procedure of this utility is as follows: First, fix the L-shaped support frame 201 of the adjustment component 2 to the outside of the scraper machine 1 housing. Then, according to the actual working conditions of the scraper machine 1, select the corresponding length of the mounting plate 205 so that the round hole at the top of the mounting plate 205 is aligned with the uniformly spaced round holes at both ends of the U-shaped mounting frame 203. Fix the two by passing bolts through the round holes.

[0033] Next, the sliding block 302 on the top of the L-shaped mounting bracket 301 in the tensioning assembly 3 is slidably embedded into the matching groove at the bottom of the mounting plate 205 to form a stable sliding guide structure. Depending on whether the scraper machine 1 is a single track or a double track, one or two tensioning assemblies 3 are installed accordingly, and the installation and adaptation of the overall structure are initially completed.

[0034] When the tensioning assembly 3 is moved along the groove of the mounting plate 205, the relative position of the tensioning wheel 304 on the bottom mounting rod 303 of the L-shaped mounting bracket 301 and the scraper chain is adjusted. Then, the bolts are passed through the screw holes on the sliding block 302 and the evenly spaced screw holes on the top of the mounting plate 205 and locked to fix the position of the tensioning assembly 3. Since the tensioning wheel 304 matches the scraper chain, it is initially adapted to the tensioning requirements.

[0035] Next, the operator sets the target tension value through the HMI (Human Machine Interface). The PLC controller activates the servo electric push rod 202 to extend, pushing the tension wheel 304 to press the scraper chain. The pressure sensor collects the thrust data in real time and feeds it back to the PLC. The PLC adjusts the output of the servo electric push rod 202 through PID calculations until the actual thrust stabilizes within the target value range and enters a holding state. Its extension end drives the U-shaped mounting bracket 203 to move up and down through the pressure sensor, synchronously driving the mounting plate 205 and the tensioning assembly 3 to adjust their height. During this process, the slide bar 204 on the L-shaped support frame 201 slides stably along the slide hole to prevent the U-shaped mounting frame 203 from shifting. At the same time, the pressure sensor can monitor the thrust of the servo electric push rod 202 on the U-shaped mounting frame 203 in real time, indirectly reflecting the tension of the tension wheel 304 on the scraper chain. If the pressure fluctuates abnormally during operation, such as chain jamming, the system can alarm or perform protective retraction. When the scraper machine 1 is running, the tension wheel 304 rotates synchronously with the scraper chain drive, continuously applying uniform tension to the scraper chain to ensure the stable operation of the scraper machine 1.

[0036] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A scraper chain tension adjustment structure, comprising a scraper conveyor (1), characterized in that: The scraper conveyor (1) is provided with an adjustment component (2), and the adjustment component (2) is provided with a tensioning component (3); The adjustment assembly (2) includes an L-shaped support frame (201) installed outside the housing of the scraper conveyor (1). A servo electric push rod (202) is installed through the L-shaped support frame (201). The telescopic end of the servo electric push rod (202) is connected to a U-shaped mounting frame (203) through a pressure sensor. A mounting plate (205) is installed at the bottom of the U-shaped mounting frame (203).

2. The scraper chain tension adjustment structure according to claim 1, characterized in that: The top of the L-shaped support frame (201) is provided with symmetrically distributed sliding holes, and a sliding rod (204) is slidably installed in each sliding hole. One end of the sliding rod (204) is connected to the U-shaped mounting frame (203).

3. The scraper chain tension adjustment structure according to claim 1, characterized in that: The tensioning assembly (3) includes an L-shaped mounting bracket (301), a sliding block (302) is provided on the top of the L-shaped mounting bracket (301), and a mounting rod (303) is installed near the bottom of the L-shaped mounting bracket (301). A tensioning wheel (304) is rotatably connected to the outer wall of the mounting rod (303).

4. The scraper chain tension adjustment structure according to claim 1, characterized in that: The two ends of the U-shaped mounting bracket (203) are provided with a number of evenly spaced circular holes, and the top of the mounting plate (205) is provided with a number of circular holes corresponding to the circular holes on the U-shaped mounting bracket (203).

5. The scraper chain tension adjustment structure according to claim 3, characterized in that: The bottom of the mounting plate (205) is provided with a sliding groove that is compatible with the sliding block (302), and the sliding block (302) is slidably installed in the sliding groove.

6. The scraper chain tension adjustment structure according to claim 3, characterized in that: The sliding block (302) has multiple screw holes, and the top of the mounting plate (205) has several screw holes that are evenly and equidistantly distributed.

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