Scraper reclaimer tail extension device

Abstract

The utility model discloses a scraper transfer machine tail telescopic device relates to scraper transfer machine technical field, including the fixed frame and the telescopic frame of sliding connection in the fixed frame one side, be equipped with the round link on telescopic frame, be equipped with the drive piece of drive telescopic frame along the fixed frame length direction movement for adjusting the tightness of round link in fixed frame, the utility model discloses through pneumatic wrench drive double worm rotation, can replace traditional manual operation, reduce maintenance personnel labor intensity, need not many people in the narrow downhole space cooperation erection equipment, simultaneously, the self -locking feature of worm wheel and worm can prevent T shape screw rod reverse movement when no driving force, avoid the broken link rebound risk that round link suddenly slack or tight led to, the symmetrical T shape screw rod, worm wheel and worm ensure that telescopic frame moves steadily along the fixed frame upper flat plate, lower flat plate.

Description

Technical Field

[0001] This utility model relates to the technical field of scraper conveyors, specifically to the tail extension device of a scraper conveyor. Background Technology

[0002] As a transfer device in the underground horizontal roadway of a coal mine, the core working components of the scraper conveyor are the circular link chain and the scraper. In actual mining operations, the power unit drives the sprocket to rotate, which drives the circular link chain to reciprocate along the axial direction. The scraper moves synchronously with the circular link chain, scraping and transferring the coal produced in the fully mechanized mining face in the conveying trough to the subsequent transportation equipment. However, due to long-term friction and impact from the coal, the circular link chain is prone to wear and breakage, and the scraper is often deformed and damaged due to scraping hard objects. Therefore, both the circular link chain and the scraper are wear parts of the scraper conveyor and need to be replaced regularly after shutdown. In existing technologies, manual hydraulic jacks are often used to complete this task. A manual hydraulic jack is installed above the scraper conveyor. A hooked chain of a certain length is connected to both ends of the jack. The hooked chain hooks hold the circular chain at both ends. After the jack is started, the hydraulic driving force tightens the circular chain at both ends. At this time, the circular chain in the middle part below the jack that needs to be replaced becomes loose due to the tension at both ends, which makes it easier to disassemble and replace. In existing technologies, jacks apply forced tension to the circular links at both ends via hooked chains, keeping the links under constant high tension. If the hooked chain is not securely anchored to the circular links, or if the jack is not stable, the circular links under high tension can easily break suddenly and rebound, potentially causing personal injury to nearby maintenance personnel. Furthermore, the working space in underground coal mine longwall faces is relatively narrow, and manual hydraulic jacks are bulky, requiring multiple people to work together during setup and fixation. Moreover, hooking and adjusting the chain requires repeated operations in a confined space, which not only increases labor intensity but also makes it easy for the chain to not be properly hooked due to insufficient operating space.

[0003] To address these issues, we designed a tail extension device for the scraper conveyor. Utility Model Content

[0004] The purpose of this utility model is to provide a tail extension device for a scraper conveyor to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides a tail telescopic device for a scraper conveyor, including a fixed frame and a telescopic frame slidably connected to one side of the fixed frame. A circular chain is wound around the telescopic frame, and a driving component is provided inside the fixed frame to drive the telescopic frame to move along the length direction of the fixed frame for adjusting the tension of the circular chain.

[0006] Furthermore, the fixed frame is connected with an upper plate and a lower plate that are parallel to each other. The telescopic frame is in contact with the outer surfaces of the upper plate and the lower plate, respectively, and the telescopic frame can slide along the outer surfaces of the upper plate and the lower plate.

[0007] Furthermore, the driving component includes a worm gear rotatably connected within the fixed frame; The worm gear is rotatably connected within the fixed frame and meshes with the worm. The T-shaped lead screw is connected to the worm gear and moves axially synchronously with the worm gear. The lead screw connecting disc is threaded onto the T-shaped lead screw and is connected on one side to the vertical plate on the telescopic frame. When the chain needs to be tightened, the worm is driven to rotate counterclockwise, which in turn drives the telescopic frame to move closer to the fixed frame via the worm gear. When the chain needs to be loosened, the worm is driven to rotate clockwise, which in turn drives the T-shaped lead screw to push the telescopic frame away from the fixed frame via the worm gear.

[0008] Furthermore, it also includes a lead screw support sleeve, which is sleeved on the outside of the T-shaped lead screw and fixedly connected to the inner wall of the fixing frame.

[0009] Furthermore, the end of the telescopic frame away from the fixed frame is rotatably connected to the tail wheel assembly body, which is used to support the circular chain.

[0010] Furthermore, the tail wheel assembly body includes two parallel tail wheels, and the number of circular chains is two, with the circular chains wound around the tail wheels.

[0011] Furthermore, the lead screw connecting plate and the vertical plate of the telescopic frame are detachably connected by bolts.

[0012] Furthermore, the end of the fixing frame near the T-shaped lead screw is detachably connected to a pressure cap assembly by bolts, and the pressure cap assembly has a through hole for the worm gear to pass through.

[0013] Furthermore, there are two of each of the T-shaped lead screw, worm gear, and worm, and they are arranged symmetrically around the middle vertical plane of the fixed frame.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. The pneumatic wrench drives the double worm gear to rotate, which can replace the traditional manual operation, reduce the labor intensity of maintenance personnel, and eliminate the need for multiple people to cooperate in setting up equipment in a confined underground space. At the same time, the self-locking feature of the worm wheel and worm can prevent the T-shaped screw from moving in the opposite direction when there is no driving force, avoiding the risk of chain breakage and rebound caused by sudden loosening or tightening of the circular chain; the symmetrically arranged T-shaped screw, worm wheel and worm ensure that the telescopic frame moves smoothly along the upper and lower plates of the fixed frame.

[0015] 2. The tail wheel of the tail wheel assembly converts the sliding friction of the circular chain into rolling friction, effectively reducing the wear and tear of the circular chain; the T-shaped lead screw, worm gear and worm are made of 316 stainless steel, which is resistant to corrosion and wear in coal mines, extending service life, and the lead screw connecting plate and the telescopic frame upright plate are detachably connected by bolts. When the drive component or telescopic frame fails, the damaged part can be quickly separated and replaced without disassembling the entire equipment, shortening maintenance time. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the overall external structure of this utility model; Figure 2 This is a three-dimensional structural schematic diagram of the front half-section of the fixing box of this utility model; Figure 3 This is a three-dimensional structural schematic diagram of the interior half-section of the side of the fixing box of this utility model; Figure 4 This utility model Figure 1 Enlarged view of point A in the middle.

[0017] In the diagram: 1. Fixed frame; 2. Telescopic frame; 3. T-shaped lead screw; 4. Worm gear; 5. Worm; 6. Lead screw support sleeve; 7. Lead screw connecting plate; 8. Pressure cap assembly; 9. Tail wheel assembly body; 10. Circular chain. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-4 This utility model provides a technical solution: a tail telescopic device for a scraper conveyor, including a fixed frame 1 and a telescopic frame 2 slidably connected to one side of the fixed frame 1. A circular chain 10 is wound around the telescopic frame 2. The fixed frame 1 is provided with a driving component that drives the telescopic frame 2 to move along the length direction of the fixed frame 1 to adjust the tension of the circular chain 10.

[0020] In practice, the telescopic frame 2 is slidably connected to the fixed frame 1 and a circular chain 10 is wound around it. The driving component inside the fixed frame 1 can drive the telescopic frame 2 to move along the length of the fixed frame 1. By changing the relative position of the telescopic frame 2 and the fixed frame 1, the tension of the circular chain 10 can be adjusted, thereby replacing the traditional forced tensioning method of the hooked chain. This setting allows the tension of the circular chain 10 to be adjusted by the cooperation of the telescopic frame 2 and the fixed frame 1, reducing the risk of the circular chain 10 suddenly breaking and rebounding. Moreover, its volume is smaller than that of a manual hydraulic jack, making it suitable for narrow working spaces in the well and eliminating the need for multiple people to cooperate in its installation.

[0021] See Figure 1-4 The fixed frame 1 has an upper plate and a lower plate that are parallel to each other. The telescopic frame 2 is in contact with the outer surfaces of the upper plate and the lower plate, and the telescopic frame 2 can slide along the outer surfaces of the upper plate and the lower plate.

[0022] In practice, the upper and lower plates inside the fixed frame 1 are parallel to each other, and the telescopic frame 2 is in contact with the outer surfaces of the upper and lower plates. The upper and lower plates provide guidance and support for the sliding of the telescopic frame 2, which prevents the telescopic frame 2 from shifting up and down or shaking during the sliding process and improves the stability of the telescopic frame 2.

[0023] See Figure 1-4 The driving component includes a worm gear 5, which is rotatably connected within the fixed frame 1; The worm gear 4 is rotatably connected to the fixed frame 1 and meshes with the worm 5; the T-shaped lead screw 3 is connected to the worm gear 4 and moves axially synchronously with the worm gear 4; the lead screw connecting disc 7 is threadedly connected to the T-shaped lead screw 3, and one side is connected to the vertical plate on the telescopic frame 2. When the chain needs to be tightened, the worm 5 is driven to rotate counterclockwise, which drives the telescopic frame 2 to move closer to the fixed frame 1 through the worm gear 4; when the chain needs to be loosened, the worm 5 is driven to rotate clockwise, which drives the T-shaped lead screw 3 through the worm gear 4 to push the telescopic frame 2 away from the fixed frame 1.

[0024] It should be noted that the T-shaped lead screw 3, worm gear 4, and worm 5 are all made of 316 stainless steel. The high strength of 316 stainless steel in this configuration ensures that it is not easily deformed or broken during transmission; it is also resistant to corrosion and wear in underground coal mines; and it effectively extends the service life of the components.

[0025] Preferably, the worm gear 5 can be rotated using a pneumatic wrench.

[0026] In practice, a pneumatic wrench drives the worm 5 to rotate. The worm 5 meshes with the worm wheel 4, causing the worm wheel 4 to rotate. The worm wheel 4 drives the T-shaped lead screw 3 to move axially in sync. The T-shaped lead screw 3 is connected to the vertical plate of the telescopic frame 2 via a threaded lead screw connecting plate 7, thus enabling the telescopic frame 2 to move. When tightening the chain, the worm 5 rotates counterclockwise, pulling the telescopic frame 2 closer to the fixed frame 1. When loosening the chain, the worm 5 rotates clockwise, pushing the telescopic frame 2 away from the fixed frame 1. In this configuration, the transmission between the worm 5 and the worm wheel 4 has a self-locking feature, which can prevent the T-shaped lead screw 3 from moving in the opposite direction when there is no driving force, avoid the sudden loosening or tightening of the circular chain 10, and solve the problem of injury caused by the rebound of traditional hooked chains. Moreover, in this configuration, a pneumatic wrench can be used to drive the operation instead of manual operation, reducing labor intensity and eliminating the need for repeated manual adjustments in confined spaces.

[0027] See Figure 1-4 It also includes a lead screw support sleeve 6, which is sleeved on the outside of the T-shaped lead screw 3 and fixedly connected to the inner wall of the fixing frame 1.

[0028] In practice, the lead screw support sleeve 6 is fitted on the outside of the T-shaped lead screw 3 and fixed to the inner wall of the fixed frame 1, providing support for the T-shaped lead screw 3 and improving the stability of the T-shaped lead screw 3 during rotation.

[0029] See Figure 1-4 The end of the telescopic frame 2 away from the fixed frame 1 is rotatably connected to the tail wheel assembly body 9, which is used to support the circular chain 10.

[0030] In practice, the tail wheel assembly body 9 rotates to support the circular chain 10, so that the movement of the circular chain 10 is converted into rolling friction of the tail wheel. In this configuration, the rolling friction of the tail wheel assembly body 9 reduces the wear of the circular chain 10 and extends the service life of the circular chain 10.

[0031] See Figure 1-4 The tail wheel assembly body 9 includes two parallel tail wheels and two circular chains 10, which are wound around the tail wheels.

[0032] In specific implementation: the tail wheel assembly body 9 includes two parallel tail wheels, and two circular chains 10 are respectively wound around the corresponding tail wheels. The two tail wheels support and guide the two circular chains 10 respectively.

[0033] See Figure 1-4 The lead screw connecting plate 7 and the vertical plate of the telescopic frame 2 are detachably connected by bolts.

[0034] In practice, the lead screw connecting plate 7 and the vertical plate of the telescopic frame 2 are connected by bolts. When the drive component or the telescopic frame 2 fails, the detachable bolts can be used to separate the two components, making it easy to replace the damaged parts individually.

[0035] See Figure 1-4The end of the fixed bracket 1 near the T-shaped lead screw 3 is detachably connected to a pressure cover assembly 8 by bolts. The pressure cover assembly 8 has a through hole for the worm gear 5 to pass through.

[0036] In practice, the pressure cap assembly 8 is detachably connected to the end of the fixing frame 1 near the T-shaped lead screw 3 by bolts. The through hole on it allows the worm gear 5 to pass through, which can restrict the axial movement of the worm gear 5 and at the same time seal the worm wheel 4, worm gear 5 and other components inside the fixing frame 1.

[0037] See Figure 1-4 There are two T-shaped lead screws 3, two worm gears 4 and two worms 5, and they are arranged symmetrically with the middle vertical plane of the fixed frame 1 as the center.

[0038] In practice, the two T-shaped lead screws 3, the worm gear 4 and the worm 5 are symmetrically arranged with the middle vertical plane of the fixed frame 1 as the center, and can drive the telescopic frame 2 from both sides at the same time. This arrangement ensures that the telescopic frame 2 is subjected to uniform force during movement.

[0039] Working principle: When it is necessary to adjust the tension of the circular chain 10, a pneumatic wrench is used to drive the double worm gear 5 to rotate; the worm gear 5 meshes with the worm wheel 4, driving the worm wheel 4 to rotate synchronously, which in turn drives the T-shaped lead screw 3 to move axially along the lead screw support sleeve 6; when it is necessary to tighten the chain, the pneumatic wrench drives the worm gear 5 to rotate counterclockwise, which drives the T-shaped lead screw 3 to pull the lead screw connecting plate 7 through the worm wheel 4, which in turn pulls the telescopic frame 2 to move closer to the fixed frame 1 along the upper and lower plates of the fixed frame 1; the telescopic frame 2 drives the tail wheel assembly body 9 to move synchronously, so that the circular chain 10 is tensioned; the self-locking feature of the worm wheel 4 and the worm gear 5 prevents the T-shaped lead screw 3 from moving in the opposite direction, ensuring that the circular chain 10 is stably tensioned.

[0040] When the chain needs to be loosened, the pneumatic wrench drives the worm gear 5 to rotate clockwise, which in turn drives the T-shaped lead screw 3 through the worm wheel 4 to push the lead screw connecting plate 7, causing the telescopic frame 2 to move away from the fixed frame 1 along the upper and lower plates of the fixed frame 1; the telescopic frame 2 drives the tail wheel assembly body 9 to move, and the circular chain 10 loosens accordingly. During this process, the tail wheel of the tail wheel assembly body 9 converts the sliding friction of the circular chain 10 into rolling friction, reducing wear; and the symmetrical T-shaped lead screw 3, worm wheel 4, and worm 5 ensure that the telescopic frame 2 is subjected to uniform force.

Claims

1. A tail extension device for a scraper conveyor, characterized in that, It includes a fixed frame (1) and a telescopic frame (2) slidably connected to one side of the fixed frame (1). A circular chain (10) is wound around the telescopic frame (2). The fixed frame (1) is provided with a drive component that drives the telescopic frame (2) to move along the length direction of the fixed frame (1) to adjust the tension of the circular chain (10). The fixed frame (1) is internally connected with an upper plate and a lower plate that are parallel to each other. The telescopic frame (2) is in contact with the outer surfaces of the upper plate and the lower plate respectively, and the telescopic frame (2) can slide along the outer surfaces of the upper plate and the lower plate. The driving component includes, The worm gear (5) is rotatably connected to the fixed frame (1); The worm gear (4) is rotatably connected in the fixed frame (1) and meshes with the worm (5); The T-shaped lead screw (3) is connected to the worm gear (4) and moves axially synchronously with the worm gear (4); The lead screw connecting plate (7) is threaded onto the T-shaped lead screw (3), and one side is connected to the vertical plate on the telescopic frame (2). When the chain needs to be tightened, the drive worm (5) rotates counterclockwise, and through the worm wheel (4) it pulls the telescopic frame (2) to move closer to the fixed frame (1); When the chain needs to be loosened, the drive worm (5) rotates clockwise, and the worm wheel (4) drives the T-shaped screw (3) to push the telescopic frame (2) to move away from the fixed frame (1).

2. The tail extension device of the scraper conveyor according to claim 1, characterized in that, It also includes a lead screw support sleeve (6), which is sleeved on the outside of the T-shaped lead screw (3) and fixedly connected to the inner wall of the lower fixing frame (1).

3. The tail extension device of the scraper conveyor according to claim 1, characterized in that, The telescopic frame (2) is rotatably connected to the tail wheel assembly body (9) at the end away from the fixed frame (1), and the tail wheel assembly body (9) is used to support the circular chain (10).

4. The tail extension device of the scraper conveyor according to claim 3, characterized in that, The tail wheel assembly body (9) includes two parallel tail wheels, and the number of the circular chain (10) is two, with the circular chain (10) wrapped around the tail wheels.

5. The tail extension device of the scraper conveyor according to claim 1, characterized in that, The lead screw connecting plate (7) and the vertical plate of the telescopic frame (2) are detachably connected by bolts.

6. The tail extension device of the scraper conveyor according to claim 1, characterized in that, The fixed frame (1) is detachably connected to a pressure cover assembly (8) at one end near the T-shaped lead screw (3) by bolts. The pressure cover assembly (8) has a through hole for the worm gear (5) to pass through.

7. The tail extension device of the scraper conveyor according to claim 1, characterized in that, The number of the T-shaped lead screw (3), worm gear (4) and worm (5) are all two, and they are arranged symmetrically with the middle vertical plane of the fixed frame (1) as the center.

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