A double-row chain scraper straightening device for scraper conveyors used in mining machinery

Abstract

This invention discloses a double-row chain scraper straightening device for scraper conveyors used in mining machinery, relating to the field of conveying equipment technology. The device includes a bracket fixedly connected to the top of the scraper conveyor, and further includes: a lifting device mounted on the bracket via a sliding assembly; wherein the telescopic end of the lifting device is fixedly fitted with a housing, and both sides of the lower end of the housing are provided with strip grooves; two telescopic devices symmetrically arranged are fixedly installed inside the housing, and each telescopic end of the two telescopic devices is fixedly fitted with a U-shaped frame; two sets of rotating rollers are rotatably mounted within the two U-shaped frames via rotating shafts. This invention allows the scraper straightening process to be completed during the operation of the scraper conveyor without disassembling and installing the scraper, thus improving the scraper straightening efficiency while ensuring the working efficiency of the scraper conveyor.

Description

Technical Field

[0001] This invention belongs to the field of conveying equipment technology, specifically, it relates to a double-row chain scraper straightening device for scraper conveyors used in mining machinery. Background Technology

[0002] Double-chain scraper conveyors are commonly used continuous conveying equipment in mining engineering. They use two closed chains to drive multiple scrapers in a trough to transport bulk materials such as coal and ore. The scrapers, their core component, are prone to bending and deformation after long-term exposure to heavy loads, impacts, and friction, leading to increased operating resistance and even chain jamming. Therefore, regular straightening of the scrapers is necessary.

[0003] Traditional straightening work requires stopping the machine to disassemble the deformed scraper and then using a hydraulic press to manually flatten it. This process is not only cumbersome (involving disassembly, transportation, straightening, and reassembly) and takes several hours per process, but also results in frequent machine downtime, which seriously affects the continuity of the conveying system and the efficiency of mine production. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a double-row chain scraper straightening device for scraper conveyors in mining engineering machinery that can overcome or at least partially solve the above problems.

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0006] A double-row chain scraper straightening device for a scraper conveyor in mining machinery includes a bracket fixedly connected to the top of the scraper conveyor, and further includes: a lifting device mounted on the bracket via a sliding assembly, wherein the telescopic end of the lifting device is fixedly fitted with a housing, and both sides of the lower end of the housing are provided with strip grooves; two telescopic devices symmetrically arranged on the left and right are fixedly installed inside the housing, and the telescopic ends of the two telescopic devices are fixedly fitted with U-shaped frames; two sets of rotating rollers are rotatably mounted in the two U-shaped frames via rotating shafts, wherein multiple sets of circumferentially distributed pressure blocks are installed on the outer wall of the two rotating rollers, and the U-shaped frames are provided with a switching assembly for driving the rotating rollers to rotate.

[0007] Preferably, the force-bearing surfaces of the two sets of pressure blocks are respectively provided with a concave area and a convex area, and the shapes of the concave areas and convex areas on the multiple pressure blocks gradually tend to be planar.

[0008] Preferably, the sliding assembly includes a transverse slide rail fixedly mounted on a bracket, a slide table slidably mounted on the transverse slide rail, a return spring installed between the slide table and the end of the transverse slide rail, and the lifting device fixedly mounted on the slide table.

[0009] Preferably, the switching assembly includes a rack fixedly mounted on the housing, and a gear is mounted on the outer wall of the rotating shaft via a one-way bearing. When the two rotating rollers move away from each other to a limit distance, the gear will mesh with the rack.

[0010] Furthermore, the shaft end of the rotating roller is provided with multiple circumferentially distributed positioning grooves, the U-shaped frame is provided with mounting holes, a positioning block is slidably installed in the mounting holes, a limit plate is fixedly installed on the outer wall of the positioning block, a tension spring is installed between the limit plate and the inner wall of the U-shaped frame, and a trapezoidal block is fixedly connected inside the outer shell through the mounting plate. When the two rotating rollers approach each other and the gear separates from the rack, the trapezoidal block will press against the end of the positioning block, and the other end of the positioning block will be inserted into one of the positioning grooves.

[0011] Preferably, the outer wall of the rotating roller is provided with an installation groove, the pressure block is slidably installed in the installation groove, and a return spring is installed between the pressure block and the inner wall of the installation groove. A limiting platform away from the pressure block is fixedly provided in the installation groove.

[0012] Furthermore, the outer wall of the pressure block is fitted with a sealing ring that is tightly attached to the inner wall of the mounting groove. The pressure block has an exhaust hole extending into the mounting groove on its force-bearing surface. The end of the rotating shaft has an air inlet chamber extending into the rotating roller. The mounting groove has an air intake hole extending into the air inlet chamber. Both the air intake hole and the exhaust hole are fitted with one-way valves.

[0013] Furthermore, an annular frame is fixedly connected to the inner wall of the U-shaped frame, and multiple circumferentially distributed protrusions are fixedly installed on the outer wall of the annular frame. Rollers that rest on the outer wall of the pressure block are rotatably installed on the outer wall of the annular frame.

[0014] Preferably, inclined guide rods are fixedly connected to both sides of the lower end of the two strip grooves, strip plates are fixedly installed on the two pairs of guide rods, and cleaning brushes are installed on the opposite surfaces of the two sets of strip plates.

[0015] Preferably, the outer shell is inverted U-shaped, and both inner walls of the outer shell are provided with sliding grooves, and the two sets of U-shaped frames are slidably installed in the two sliding grooves respectively.

[0016] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0017] 1. This invention uses a lifting device to move the outer casing downwards, and two opposing pressure blocks on the two rotating rollers will be located on both sides of the scraper. Then, two sets of telescopic devices will drive the two rotating rollers to move closer to each other, thereby completing the flattening and straightening work of the scraper. Since the straightening process is completed during the operation of the scraper machine, and there is no need to disassemble and install the scraper, the straightening efficiency of the scraper can be improved on the one hand, and the working efficiency of the scraper machine can be guaranteed on the other hand.

[0018] 2. This invention uses a telescopic device to move two rotating rollers away from the U-shaped frame, causing another set of adjacent pressure blocks to move to both sides of the scraper, thus completing the flattening and straightening work of the scraper again. This process is repeated, allowing multiple sets of pressure blocks to flatten and straighten the scraper in turn. Since the two sets of pressure blocks have concave and convex areas respectively, the curved parts of the scraper will be gradually flattened by multiple sets of pressure blocks, preventing damage to the scraper caused by flattening in one go and ensuring the scraper's lifespan.

[0019] 3. The present invention uses a return spring and a limiting platform to set up the scraper. When the two rollers approach each other, the pressure block will apply pressure to both sides of the scraper twice. The first pressure is the pressure of the return spring, and the second pressure is the pressure of the limiting platform. The first pressure is less than the second pressure. The two pressures, which are gradually increasing, will make the scraper more stable in the correction process and make the scraper less likely to be damaged during the correction process.

[0020] 4. In this invention, when the pressure block slides towards the limiting platform, it compresses the air in the mounting groove. The air in the mounting groove is then discharged to the surface of the scraper through the exhaust hole. This blows off some foreign objects from the scraper surface, reducing damage to the scraper and pressure block surface caused by foreign objects during the straightening process. Furthermore, the flowing airflow can also assist in heat dissipation of the pressure block, making it less likely for the pressure block to have its service life reduced due to high temperatures.

[0021] 5. In this invention, multiple pressure blocks are driven to revolve around their axis by a rotating roller. The pressure blocks will vibrate back and forth under the action of multiple protrusions. On the one hand, the pressure blocks can be well dissipated. On the other hand, the pressure blocks can also shake off some foreign objects remaining on the force-bearing surface, reducing the impact of foreign objects on the correction work.

[0022] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0023] In the attached diagram:

[0024] Figure 1 This is a three-dimensional structural diagram of a double-row chain scraper straightening device for a scraper conveyor used in mining machinery, as proposed in this invention. Figure 1 ;

[0025] Figure 2 This is a three-dimensional structural diagram of a double-row chain scraper straightening device for a scraper conveyor used in mining machinery, as proposed in this invention. Figure 2 ;

[0026] Figure 3 This is a partial structural schematic diagram of a double-row chain scraper straightening device for a scraper conveyor used in mining machinery, as proposed in this invention.

[0027] Figure 4This is a schematic diagram of the outer shell structure of a double-row chain scraper straightening device for a scraper conveyor used in mining machinery, as proposed in this invention.

[0028] Figure 5 This is a schematic diagram of the U-shaped frame structure of a double-row chain scraper straightening device for scraper conveyors used in mining machinery, as proposed in this invention.

[0029] Figure 6 This is a schematic diagram of the rotating roller structure of a double-row chain scraper straightening device for a scraper conveyor used in mining machinery, as proposed in this invention.

[0030] Figure 7 This is a schematic diagram of the rotary roller section structure of a double-row chain scraper straightening device for a scraper conveyor in mining machinery proposed in this invention;

[0031] Figure 8 This is a partial cross-sectional schematic diagram of the U-shaped frame of a double-row chain scraper straightening device for a scraper conveyor used in mining machinery, as proposed in this invention.

[0032] Figure 9 This is a schematic diagram of the pressure block structure of a double-row chain scraper straightening device for a scraper conveyor in mining machinery proposed in this invention;

[0033] Figure 10 This is a schematic diagram of the scraper straightening process of a double-row chain scraper straightening device for scraper conveyors in mining engineering machinery proposed in this invention.

[0034] In the diagram: 1. Bracket; 2. Transverse slide rail; 3. Slide table; 4. Lifting device; 5. Housing; 6. U-shaped frame; 7. Telescopic device; 8. Rotating shaft; 9. Rotating roller; 10. Pressure block; 11. Gear; 12. Rack; 13. Positioning groove; 14. Mounting hole; 15. Positioning block; 16. Limiting plate; 17. Tension spring; 18. Mounting plate; 19. Trapezoidal block; 20. Mounting groove; 21. Return spring; 22. Limiting platform; 23. Exhaust hole; 24. Air inlet chamber; 25. Air intake hole; 26. Ring frame; 27. Protrusion; 28. Roller; 29. ​​Strip groove; 30. Guide rod; 31. Strip plate; 32. Cleaning brush; 33. Recessed area; 34. Raised area; 35. Return spring. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0036] Example 1: Refer to Figures 1-10A double-row chain scraper straightening device for a scraper conveyor in mining machinery includes a bracket 1 fixedly connected to the top of the scraper conveyor, and a lifting device 4 perpendicular to the scraper conveyor, mounted on the bracket 1 via a sliding assembly. The lifting device 4 can be an electric telescopic rod or a hydraulic telescopic rod. The sliding assembly includes a transverse slide rail 2 fixedly mounted on the bracket 1, a slide table 3 slidably mounted on the transverse slide rail 2, and a return spring 35 installed between the slide table 3 and the end of the transverse slide rail 2. The lifting device 4 is fixedly mounted on the slide table 3. The extension and retraction of the lifting device 4... A housing 5 is fixedly installed at one end. Both sides of the lower end of the housing 5 are provided with strip grooves 29. Two telescopic devices 7 are fixedly installed inside the housing 5, which are symmetrically arranged. The telescopic devices 7 are telescopic hydraulic cylinders. U-shaped frames 6 are fixedly installed at the telescopic ends of the two telescopic devices 7. Two sets of rotating rollers 9 are rotatably installed in the two U-shaped frames 6 through rotating shafts 8. The shape of the rotating rollers 9 is circular or regular polygonal. Multiple sets of circumferentially distributed pressure blocks 10 are installed on the outer wall of the two rotating rollers 9. The U-shaped frame 6 is provided with a switching component that drives the rotating rollers 9 to rotate.

[0037] Specifically, during use, when the scraper on the scraper conveyor becomes bent and needs correction, the lifting device 4 moves the outer casing 5 downwards, causing the strip grooves 29 on both sides of the lower end of the outer casing 5 to engage with the sides of the scraper. The moving scraper then moves the outer casing 5 synchronously, and the outer casing 5, via the lifting device 4, moves the slide table 3 horizontally along the transverse slide rail 2. At this time, the two opposing pressure blocks 10 on the two rotating rollers 9 are positioned on both sides of the scraper. Then, the two sets of telescopic devices 7 move the two rotating rollers 9 closer together, which in turn moves the two opposing pressure blocks 10 closer together, thus completing the correction of the scraper. The flattening and straightening work is completed during the operation of the scraper machine without the need to disassemble or install the scraper. This improves the straightening efficiency of the scraper and ensures the working efficiency of the scraper machine. After the straightening is completed, the lifting device 4 moves the outer shell 5 away from the scraper. At this time, the outer shell 5 is no longer limited by the scraper. The return spring 35 will drive the slide table 3 to slide back and reset on the transverse slide rail 2, so as to facilitate the straightening work of the next scraper. The replacement component can realize the automatic rotation of the roller 9, so that different pressure blocks 10 can press the two sides of the scraper in turn.

[0038] In practical use, if the scraper straightening work is affected by the excessive speed of the scraper conveyor, the problem can be solved by reducing the running speed of the scraper conveyor.

[0039] Reference Figure 10 As shown, the force-bearing surfaces of the two sets of pressure blocks 10 are respectively provided with a concave area 33 and a convex area 34, and the shapes of the concave area 33 and the convex area 34 on the multiple pressure blocks 10 gradually tend to be planar.

[0040] Specifically, the rotating roller 9 can cause multiple sets of pressure blocks 10 to press and straighten the scraper in turn. Since the two sets of pressure blocks 10 are respectively provided with a concave area 33 and a convex area 34, and the shapes of the concave area 33 and the convex area 34 gradually become more and more planar, the curved part of the scraper will be gradually pressed flat by multiple sets of pressure blocks 10, preventing the scraper from being damaged due to one-time straightening and pressing, and ensuring the scraper's life.

[0041] The outer shell 5 is inverted U-shaped, and the inner walls on both sides of the outer shell 5 are provided with sliding grooves. The two sets of U-shaped frames 6 are slidably installed in the two sliding grooves respectively. This can give the U-shaped frames 6 good positioning and make them more stable when the U-shaped frames 6 move horizontally.

[0042] Example 2: Refer to Figures 3-6 as well as Figure 8 A double-row chain scraper straightening device for scraper conveyors used in mining machinery is basically the same as that in Embodiment 1, but with a further improvement:

[0043] The aforementioned switching assembly includes a rack 12 fixedly mounted on the housing 5, and a gear 11 mounted on the outer wall of the rotating shaft 8 via a one-way bearing. When the two rotating rollers 9 move away from each other to their limit distance, the gear 11 will mesh with the rack 12.

[0044] Specifically, after the two pressure blocks 10 complete one flattening and straightening operation, the telescopic device 7 drives the two rotating rollers 9 and the U-shaped frame 6 to move away from each other. When the U-shaped frame 6 moves to its limit position, it will drive the gear 11 to roll along the rack 12. The rack 12 will then drive the gear 11 to rotate. The gear 11 will drive the rotating roller 9 to rotate through the rotating shaft 8, thereby moving the pressure blocks 10 in another adjacent position to both sides of the scraper, so as to complete multiple sets of straightening and flattening operations. When the rack 12 drives the gear 11 to reverse, since the gear 11 is mounted on the rotating shaft 8 through a one-way bearing, the gear 11 will only rotate on the rotating shaft 8 and will not drive the rotating shaft 8 to reverse.

[0045] The shaft end of the aforementioned roller 9 is provided with multiple circumferentially distributed positioning grooves 13. The U-shaped frame 6 is provided with mounting holes 14. A positioning block 15 is slidably installed in the mounting holes 14. A limit plate 16 is fixedly installed on the outer wall of the positioning block 15. A tension spring 17 is installed between the limit plate 16 and the inner wall of the U-shaped frame 6. A trapezoidal block 19 is fixedly connected inside the outer shell 5 through a mounting plate 18. When the two rollers 9 approach each other and the gear 11 separates from the rack 12, the trapezoidal block 19 will press against the end of the positioning block 15, and the other end of the positioning block 15 will be inserted into one of the positioning grooves 13.

[0046] Specifically, when the U-shaped frame 6 drives the rotating roller 9 away from the scraper, that is, before the gear 11 and rack 12 mesh, the moving U-shaped frame 6 drives the positioning block 15 to move synchronously. The end of the positioning block 15 will pass over the trapezoidal block 19, and the positioning block 15 will no longer be pressed by the trapezoidal block 19. The tension spring 17 will drive the positioning block 15 to slide and reset in the mounting hole 14 through the limiting plate 16, and make the end of the positioning block 15 away from the positioning groove 13. At this time, the rotating roller 9 can rotate. When the U-shaped frame 6 drives the rotating roller 9 close to the scraper, and the gear 11 just separates from the rack 12, the trapezoidal block 19 will press against the end of the positioning block 15, and the positioning block 15 will be inserted into one of the positioning grooves 13, thereby preventing the rotating roller 9 from continuing to rotate. Thus, it can prevent the two pressure blocks 10 from shifting position when they are close to each other, and ensure the stability of the scraper correction work.

[0047] Example 3: Reference Figures 5-9 A double-row chain scraper straightening device for scraper conveyors used in mining machinery is basically the same as that in Example 2, but with a further improvement:

[0048] The outer wall of the roller 9 is provided with an installation groove 20. The pressure block 10 is slidably installed in the installation groove 20, and a return spring 21 is installed between the pressure block 10 and the inner wall of the installation groove 20. A limiting platform 22 that is far away from the pressure block 10 is fixedly installed in the installation groove 20.

[0049] Specifically, when the two pressure blocks 10 approach each other and press against the side wall of the scraper, the pressure blocks 10 will first slide towards the limiting platform 22 and compress the return spring 21. After the pressure blocks 10 press against the limiting platform 22, the pressure blocks 10 will no longer slide. Then, when the two rotating rollers 9 approach each other, the pressure blocks 10 will apply pressure to both sides of the scraper twice. The first pressure is the pressure of the return spring 21, and the second pressure is the pressure of the limiting platform 22. The first pressure is less than the second pressure. The two pressures, which are from small to large, will make the scraper more stably corrected and prevent the scraper from being damaged during the correction process. When the two rotating rollers 9 move away from each other, the return spring 21 will drive the two pressure blocks 10 to slide back to their original positions.

[0050] The outer wall of the aforementioned pressure block 10 is fitted with a sealing ring that is tightly attached to the inner wall of the mounting groove 20. The pressure block 10 has an exhaust hole 23 extending into the mounting groove 20 on its force-bearing surface. The end of the rotating shaft 8 has an air inlet chamber 24 extending into the rotating roller 9. The mounting groove 20 has an air intake hole 25 extending into the air inlet chamber 24. Both the air intake hole 25 and the exhaust hole 23 are fitted with one-way valves.

[0051] When the pressure block 10 slides towards the limiting stage 22, it compresses the air in the mounting groove 20. The air in the mounting groove 20 is then discharged to the surface of the scraper through the exhaust hole 23, which can blow off some foreign objects from the scraper surface, reducing damage to the scraper and pressure block 10 surface caused by foreign objects during the scraper correction process. When the pressure block 10 slides back to its original position, the mounting groove 20 draws air into the air intake chamber 24 through the air intake hole 25. The air intake chamber 24 draws in outside air. As the air passes through the mounting groove 20 and the exhaust hole 23, the flowing airflow can also help dissipate heat from the pressure block 10, making it less likely for the pressure block 10 to have its service life reduced due to high temperature.

[0052] A ring frame 26 is fixedly connected to the inner wall of the U-shaped frame 6. A plurality of circumferentially distributed protrusions 27 are fixedly installed on the outer wall of the ring frame 26. A roller 28 is rotatably installed on the outer wall of the pressure block 10, which rests on the outer wall of the ring frame 26.

[0053] Specifically, when the rotating roller 9 rotates, it drives multiple pressure blocks 10 to revolve around its axis. The pressure blocks 10 drive the roller 28 to roll along the outer wall of the ring frame 26. When the roller 28 presses against the protrusion 27, the roller 28 drives the pressure block 10 to slide away from the protrusion 27. When the roller 28 passes the protrusion 27, the return spring 21 drives the pressure block 10 to slide back to its original position. Thus, when the rotating roller 9 rotates, the pressure block 10 will vibrate back and forth under the action of multiple protrusions 27. On the one hand, this can allow the pressure block 10 to dissipate heat well. On the other hand, the pressure block 10 can also shake off some foreign objects remaining on the force-bearing surface, reducing the impact of foreign objects on the correction work.

[0054] Example 4: Reference Figures 1-2 as well as Figure 4 A double-row chain scraper straightening device for scraper conveyors used in mining machinery is basically the same as that in Example 3, but with a further improvement:

[0055] Both sides of the lower end of the two strip grooves 29 are fixedly connected with inclined guide rods 30, and strip plates 31 are fixedly installed on the two pairs of guide rods 30. Cleaning brushes 32 are installed on the opposite sides of the two sets of strip plates 31.

[0056] Specifically, when the outer casing 5 moves downward, the outer casing 5, under the action of the two sets of guide rods 30, causes the strip grooves 29 to be respectively locked onto both ends of the moving scraper, thereby making it easier to lock the outer casing 5 on both sides of the scraper. During the downward movement of the outer casing 5, the cleaning brushes 32 on the two strip plates 31 can remove most of the foreign objects on the scraper, preventing foreign objects from damaging the scraper and the pressure block 10 during the scraper correction.

[0057] The working principle of this invention is as follows: During use, when the scraper on the scraper conveyor becomes bent and needs correction, the lifting device 4 drives the outer casing 5 downward. Under the action of two sets of guide rods 30, the outer casing 5 causes the strip grooves 29 to respectively engage with both ends of the moving scraper. The moving scraper then drives the outer casing 5 to move synchronously. The outer casing 5, through the lifting device 4, drives the slide table 3 to move horizontally on the transverse slide rail 2. At this time, the two opposing pressure blocks 10 on the two rotating rollers 9 will be located on both sides of the scraper. Then, through two sets of telescopic devices 7, the two rotating rollers 9 are driven to move closer to each other. The rotating roller 9 will drive the two opposing pressure blocks 10 to move closer to each other, thereby completing the flattening and straightening work of the scraper. Since the straightening process is completed during the operation of the scraper machine, and there is no need to disassemble and install the scraper, the straightening efficiency of the scraper can be improved on the one hand, and the working efficiency of the scraper machine can be guaranteed on the other hand. After the straightening is completed, the lifting device 4 drives the outer shell 5 away from the scraper. At this time, the outer shell 5 is no longer limited by the scraper. The return spring 35 will drive the slide table 3 to slide in the opposite direction on the transverse slide rail 2 to reset, so as to facilitate the straightening work of the next scraper.

[0058] When the two pressure blocks 10 approach each other, the recessed areas 33 and raised areas 34 on the two pressure blocks 10 will respectively face the recessed and raised parts on both sides of the scraper. After the two pressure blocks 10 complete one flattening and correction, the telescopic device 7 drives the two rotating rollers 9 and the U-shaped frame 6 to move away from each other. When the U-shaped frame 6 moves to its limit position, it will drive the gear 11 to roll along the rack 12. The rack 12 will then drive the gear 11 to rotate. The gear 11 will drive the rotating roller 9 to rotate through the rotating shaft 8, thereby moving the other set of adjacent pressure blocks 10 to both sides of the scraper. The telescopic device 7 will again drive the two rotating rollers 9 to approach each other, and the other set of... The pressure block 10 can then complete the flattening and straightening work of the scraper again. In this way, multiple sets of pressure blocks 10 take turns to flatten and straighten the scraper. Since the two sets of pressure blocks 10 are respectively provided with a concave area 33 and a convex area 34, and the shapes of the concave area 33 and the convex area 34 gradually become more and more planar, the curved part of the scraper will be gradually flattened by multiple sets of pressure blocks 10, preventing the scraper from being damaged due to one-time straightening and flattening, thus ensuring the scraper's lifespan. When the rack 12 drives the gear 11 to reverse, since the gear 11 is mounted on the rotating shaft 8 through a one-way bearing, the gear 11 will only rotate on the rotating shaft 8 and will not drive the rotating shaft 8 to reverse.

[0059] When the two pressure blocks 10 approach each other and press against the side wall of the scraper, the pressure blocks 10 will first slide towards the limiting platform 22 and compress the return spring 21. After the pressure blocks 10 press against the limiting platform 22, the pressure blocks 10 will no longer slide. Then, when the two rotating rollers 9 approach each other, the pressure blocks 10 will apply pressure to both sides of the scraper twice. The first pressure is the pressure of the return spring 21, and the second pressure is the pressure of the limiting platform 22. The first pressure is less than the second pressure. The two pressures, which are from small to large, will make the scraper more stably corrected and prevent the scraper from being damaged during the correction process. When the two rotating rollers 9 move away from each other, the return spring 21 will drive the two pressure blocks 10 to slide back to their original positions.

[0060] When the pressure block 10 slides towards the limiting stage 22, it compresses the air in the mounting groove 20. The air in the mounting groove 20 is then discharged to the surface of the scraper through the exhaust hole 23, which can blow off some foreign objects from the scraper surface, reducing damage to the scraper and pressure block 10 surface caused by foreign objects during the scraper correction process. When the pressure block 10 slides back to its original position, the mounting groove 20 draws air into the air intake chamber 24 through the air intake hole 25. The air intake chamber 24 draws in outside air. As the air passes through the mounting groove 20 and the exhaust hole 23, the flowing airflow can also help dissipate heat from the pressure block 10, making it less likely for the pressure block 10 to have its service life reduced due to high temperature.

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any modifications or alterations made by those skilled in the art without departing from the scope of the present invention using the above-described technical content can be considered equivalent embodiments with equivalent variations. Any simple modifications, equivalent variations, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A double-row chain scraper straightening device for a scraper conveyor in mining machinery, comprising a bracket (1) fixedly connected to the top of the scraper conveyor, characterized in that, Also includes: The lifting device (4) is mounted on the bracket (1) via a sliding assembly. The telescopic end of the lifting device (4) is fixedly installed with a shell (5), and both sides of the lower end of the shell (5) are provided with strip grooves (29). Two telescopic devices (7) are fixedly installed inside the shell (5) and are arranged symmetrically on the left and right. The telescopic ends of the two telescopic devices (7) are fixedly installed with U-shaped frames (6). Both sets of rotating rollers (9) are rotatably mounted in the two U-shaped frames (6) via rotating shafts (8). Among them, multiple sets of circumferentially distributed pressure blocks (10) are installed on the outer walls of the two rollers (9), and the U-shaped frame (6) is provided with a switching component to drive the rollers (9) to rotate. The switching assembly includes a rack (12) fixedly mounted on the housing (5), and a gear (11) is mounted on the outer wall of the rotating shaft (8) via a one-way bearing. When the two rotating rollers (9) move away from each other to the limit distance, the gear (11) will mesh with the rack (12). The shaft end of the rotating roller (9) is provided with multiple circumferentially distributed positioning grooves (13). The U-shaped frame (6) is provided with mounting holes (14). A positioning block (15) is slidably installed in the mounting hole (14). A limit plate (16) is fixedly installed on the outer wall of the positioning block (15). A tension spring (17) is installed between the limit plate (16) and the inner wall of the U-shaped frame (6). A trapezoidal block (19) is fixedly connected to the outer shell (5) through a mounting plate (18). When the two rotating rollers (9) approach each other and the gear (11) separates from the rack (12), the trapezoidal block (19) will press against the end of the positioning block (15), and the other end of the positioning block (15) will be inserted into one of the positioning grooves (13).

2. The double-row chain scraper straightening device for scraper conveyors in mining machinery according to claim 1, characterized in that, The two sets of pressure blocks (10) have a concave area (33) and a convex area (34) on their force-bearing surfaces respectively. The shapes of the concave areas (33) and convex areas (34) on the multiple pressure blocks (10) gradually tend to be planar.

3. The double-row chain scraper straightening device for scraper conveyors in mining machinery according to claim 1, characterized in that, The sliding assembly includes a transverse slide rail (2) fixedly mounted on a bracket (1), a slide table (3) slidably mounted on the transverse slide rail (2), a return spring (35) installed between the slide table (3) and the end of the transverse slide rail (2), and the lifting device (4) fixedly mounted on the slide table (3).

4. The double-row chain scraper straightening device for scraper conveyors in mining engineering machinery according to claim 1, characterized in that, The outer wall of the roller (9) is provided with an installation groove (20), the pressure block (10) is slidably installed in the installation groove (20), and a return spring (21) is installed between the pressure block (10) and the inner wall of the installation groove (20). A limiting platform (22) far away from the pressure block (10) is fixedly provided in the installation groove (20).

5. A double-row chain scraper straightening device for a scraper conveyor in mining machinery according to claim 4, characterized in that, The outer wall of the pressure block (10) is fitted with a sealing ring that is tightly attached to the inner wall of the mounting groove (20). The pressure block (10) has an exhaust hole (23) extending into the mounting groove (20) on its force-bearing surface. The end of the rotating shaft (8) has an air inlet chamber (24) extending into the rotating roller (9). The mounting groove (20) has an air intake hole (25) extending into the air inlet chamber (24). Both the air intake hole (25) and the exhaust hole (23) are fitted with one-way valves.

6. A double-row chain scraper straightening device for a scraper conveyor in mining machinery according to claim 5, characterized in that, A ring frame (26) is fixedly connected to the inner wall of the U-shaped frame (6), and a plurality of circumferentially distributed protrusions (27) are fixedly installed on the outer wall of the ring frame (26). A roller (28) is rotatably installed on the outer wall of the pressure block (10) and rests on the outer wall of the ring frame (26).

7. A double-row chain scraper straightening device for scraper conveyors in mining machinery according to claim 1, characterized in that, Both sides of the lower end of the two strip grooves (29) are fixedly connected with inclined guide rods (30), and strip plates (31) are fixedly installed on the two pairs of guide rods (30). Cleaning brushes (32) are installed on the opposite surfaces of the two sets of strip plates (31).

8. A double-row chain scraper straightening device for a scraper conveyor in mining machinery according to claim 1, characterized in that, The outer shell (5) is inverted U-shaped, and the inner walls on both sides of the outer shell (5) are provided with sliding grooves. The two sets of U-shaped frames (6) are slidably installed in the two sliding grooves respectively.

Images