Chain slack prevention device for flight conveyors and method of use thereof

Abstract

The present application relates to chain anti-loose technical field, and disclose a scraper conveyor chain anti-loose device and its using method, including conveyor box;Two groups of conveying chain, symmetrically arranged in the inner wall of the conveyor box;A plurality of conveying scrapers, equidistantly arranged on two groups of conveying chain;Two guide ports, symmetrically arranged in the side of the conveyor box;Two guide plates, respectively slidingly installed in the inner wall of two guide ports;The present application through the coil energization and the magnetic force effect of metal rod, metal sleeve and metal plate, realizes the accurate control to conveying chain tension, when conveying chain loosens, the drop of metal sleeve leads to the magnetic force enhancement, so as to further jolt guide plate and make the chain wheel more closely tensioned, this kind of magnetic tensioning mode is not only accurate, but also can be flexibly adjusted according to the relaxation degree of chain, ensures the stable operation of conveying chain.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of chain slack prevention, in particular to a chain slack prevention device of a scraper conveyor and a use method thereof. BACKGROUND

[0002] The scraper conveyor is mainly used for short-distance conveying of materials at a horizontal or an inclination angle not greater than 15 degrees. It is widely used in mining (such as mining and transportation of coal and ore), metallurgy, building materials, chemical industry, grain processing, environmental protection, and power industry, for conveying materials such as coal, iron ore, copper ore, coke, cement clinker, gypsum, grain, feed, sludge, dust, and coal powder.

[0003] Through retrieval, a chain slack prevention device for a compact chain type scraper conveyor is disclosed in Chinese Patent No. CN115783648B, which relates to the technical field of scraper conveyor accessories and includes a support assembly, a driving assembly, a tension adjusting assembly, a chain assembly, and a tensioning assembly. The support assembly has a driving assembly and a tension adjusting assembly at both ends, and the chain assembly is arranged between the driving assembly and the tension adjusting assembly. The tension adjusting assembly includes a fixed sprocket, a guide sprocket, and an adjusting roller. The adjusting roller moves around the guide sprocket. By adjusting the position of the adjusting roller, the adjusting roller drives the chain assembly to move, thereby adjusting the tightness of the chain assembly. At the same time, the distance between the adjusting roller and the guide sprocket remains fixed, so the adjusting roller adjusts the chain assembly during operation, thereby simplifying the adjustment process of the scraper conveyor chain. However, this scheme still has the following shortcomings in actual use:

[0004] The chain slack adjustment of the scraper conveyor is a crucial step. However, this step currently relies mainly on manual adjustment, which usually depends on the experience and visual observation of the operator. This adjustment method lacks precision and stability, making it difficult to ensure that each adjustment reaches the optimal state. If the chain adjustment is not in place and slack occurs, it will significantly reduce the transmission efficiency and affect the overall performance and working efficiency of the scraper conveyor. On the contrary, if the chain is adjusted too tightly, although it can avoid the problem of slack, it will cause greater friction resistance, which not only increases energy consumption but also accelerates the wear of the chain and sprocket, shortening the service life of the equipment.

[0005] Therefore, it is necessary to design a chain slack prevention device of a scraper conveyor and a use method thereof to solve the above problems. SUMMARY

[0006] The purpose of the present application is to solve the shortcomings of the prior art and provide a chain slack prevention device of a scraper conveyor and a use method thereof.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] The chain anti-loosening device for the scraper conveyor includes:

[0009] Conveyor housing;

[0010] Two sets of conveyor chains are symmetrically arranged on the inner wall of the conveyor box;

[0011] Several conveying scrapers are evenly spaced and arranged on the two sets of conveying chains;

[0012] Two guide openings are symmetrically provided on the side of the conveyor box;

[0013] Two guide plates are slidably installed on the inner walls of the two guide ports, respectively;

[0014] Two tension sprockets are respectively rotatably installed at one end of the two guide plates located inside the conveyor box, and the tension sprockets mesh with the conveyor chain;

[0015] Two sets of tensioning components are symmetrically arranged on the conveyor box at positions corresponding to the two guide plates;

[0016] Two connecting frames are symmetrically and fixedly installed on the conveyor box;

[0017] Two connecting plates are respectively fixedly installed at the ends of the two connecting frames, and the connecting plates are located above the tensioning assembly;

[0018] Six clamping components are arranged in a linear array of three groups on the sides of the two connecting plates;

[0019] Six metal sleeves are respectively disposed on the six clamping assemblies;

[0020] Four clearance openings are symmetrically arranged in pairs on the conveyor box;

[0021] Two U-shaped rods are slidably installed on the inner walls of the clearance openings on both sides;

[0022] Four linkage frames are respectively fixedly installed at one end of the two U-shaped rods located inside the conveyor box, and the linkage frames are adapted to the conveyor chain;

[0023] Four springs are respectively fixedly installed between the bottom surfaces of the two ends of the two U-shaped rods and the inner bottom surfaces of the four clearance openings;

[0024] Two sets of indicator components are symmetrically arranged on the conveyor box.

[0025] As a preferred embodiment of the present invention, the tensioning component includes:

[0026] The mounting box is fixedly installed on the side of the conveyor box above the guide plate;

[0027] A metal plate is fixedly installed on the bottom surface of the mounting box, and the metal plate is in communication with the interior of the mounting box;

[0028] The coil is disposed on the inner wall of the mounting box;

[0029] A metal rod is fixedly installed on the top surface of the metal plate;

[0030] A magnetic sheet is fixedly installed on the top surface of the guide plate;

[0031] Two wires are electrically connected to the two ends of the coil, respectively.

[0032] In a preferred embodiment of the present invention, the metal rod and the metal sleeve are coaxially arranged, and the metal plate and the magnetic sheet are opposite to each other.

[0033] As a preferred embodiment of the present invention, the clamping assembly includes:

[0034] Two brackets are symmetrically fixedly installed on the side of the connecting plate;

[0035] Two clamping gears are rotatably mounted on the ends of the two brackets away from the connecting plate, and the two clamping gears are meshed.

[0036] Two grippers are respectively fixedly installed on the top surfaces of the two gripping gears;

[0037] A connecting cylinder is fixedly installed on the side of the connecting plate;

[0038] A sliding magnetic plate is slidably installed on the inner wall of the open end of the connecting cylinder;

[0039] Spring 1 is fixedly installed between the sliding magnetic plate and the inner wall of the connecting cylinder;

[0040] The connecting rod is fixedly installed at one end of the sliding magnetic plate located outside the connecting cylinder;

[0041] A connecting rack is fixedly installed at the end of the connecting rod away from the sliding magnetic plate, and the connecting rack meshes with the clamping gear;

[0042] A fixed magnetic plate is fixedly installed on the side of the U-shaped rod.

[0043] As a preferred embodiment of the present invention, the fixed magnetic plate and the sliding magnetic plate have the same magnetic poles, and each of the two grippers is provided with a clamping plate adapted to the metal sleeve at the end away from the clamping gear.

[0044] As a preferred embodiment of the present invention, the indicating component includes:

[0045] A fixing plate is fixedly installed on the side of the conveyor box;

[0046] An indicator plate is fixedly installed at the end of the fixed plate away from the conveyor box;

[0047] The drive shaft is rotatably mounted at one corner of the top surface of the indicator plate;

[0048] The indicator needle is fixedly mounted on the bottom end of the drive shaft;

[0049] The driven bevel gear is fixedly mounted on the top end of the drive shaft;

[0050] The linkage mechanism is located between the driven bevel gear and the U-shaped rod.

[0051] As a preferred embodiment of the present invention, the linkage mechanism includes:

[0052] A rotating shaft is rotatably mounted on the side of the conveyor housing;

[0053] The transmission gear is fixedly mounted on the rotating shaft;

[0054] A drive bevel gear is fixedly mounted on the end of the rotating shaft, and the drive bevel gear meshes with the driven bevel gear;

[0055] A drive rack is fixedly mounted on the side of the U-shaped rod, and the drive rack meshes with the transmission gear.

[0056] As a preferred embodiment of the present invention, the indicator plate is a quarter circle, and the top surface of the indicator plate is provided with scale lines adapted to the indicator needle.

[0057] As a preferred embodiment of the present invention, the inner wall of the linkage frame is coated with lubricating oil.

[0058] The method for using the chain anti-loosening device of the scraper conveyor, based on the above-mentioned chain anti-loosening device of the scraper conveyor, includes the following steps:

[0059] Step 1: When the conveyor chain becomes loose, the pressure linkage frame causes the U-shaped rod to slide down. The fixed magnetic plate on the side of the U-shaped rod and the sliding magnetic plate repel each other, which drives the connecting rack to move, thereby rotating the clamping gear to release the metal sleeve and make it fall.

[0060] Step 2: After the metal sleeve falls off, it adheres to the metal plate. The energized coil causes the metal rod and the metal plate to repel each other magnetically. The presence of the metal sleeve affects the strength of the magnetic force, which in turn adjusts the tension of the guide plate and the conveyor chain. The more sleeves fall off, the stronger the magnetic force and the more obvious the tensioning effect.

[0061] Step 3: The U-shaped rod moves to drive the rack and pinion, which in turn rotates the indicator needle through the meshing of the transmission gear and bevel gear. The operator can visually understand the slack of the conveyor chain by looking at the indicator needle and the scale lines on the indicator plate.

[0062] The present invention has the following beneficial effects:

[0063] 1. By setting up a tensioning assembly and a tensioning sprocket, the tension of the conveyor chain is precisely controlled through the magnetic force generated by the energization of the coil and the metal rod, metal sleeve, and metal plate. When the conveyor chain becomes loose, the falling of the metal sleeve increases the magnetic force, which further pushes the guide plate to make the tensioning sprocket tighten the chain more tightly. This magnetic tensioning method is not only precise, but can also be flexibly adjusted according to the slack of the chain, ensuring the stable operation of the conveyor chain.

[0064] 2. By setting up a clamping assembly and a metal sleeve, the linkage frame trigger can automatically detect and respond to when the conveyor chain becomes loose. When the conveyor chain becomes loose and presses against the linkage frame, the linkage frame and the U-shaped rod slide downwards along the clearance opening, triggering the clamping assembly to release the metal sleeve. This process requires no manual intervention and achieves automated operation. At the same time, it has high reliability and can accurately reflect the slack state of the chain.

[0065] 3. By setting up a U-shaped rod and an indicator component, and through the coordinated use of components such as a drive rack, transmission gear, bevel gear, and indicator needle, the looseness of the conveyor chain can be intuitively displayed. When the U-shaped rod moves, it drives the drive rack to move and triggers the linkage mechanism to rotate the indicator needle. Workers can intuitively understand the looseness of the chain by observing the indicator needle and the scale lines on the top surface of the indicator plate. This indication method is not only intuitive and easy to understand, but also can promptly remind workers to take appropriate measures to ensure the stability and safety of the conveyor chain. Attached Figure Description

[0066] Figure 1 This is a three-dimensional structural diagram of the chain anti-loosening device for the scraper conveyor and its usage method proposed in this invention;

[0067] Figure 2 This is a partial cross-sectional schematic diagram of the chain anti-loosening device for the scraper conveyor and its usage method proposed in this invention;

[0068] Figure 3 This is a schematic diagram of the tensioning sprocket and connecting plate structure of the chain anti-loosening device and its usage method for the scraper conveyor proposed in this invention.

[0069] Figure 4 This is a schematic diagram of the mounting box structure for the chain anti-loosening device and its usage method for the scraper conveyor proposed in this invention;

[0070] Figure 5 This is a schematic diagram of the clamping assembly structure of the chain anti-loosening device for scraper conveyors and its usage method proposed in this invention;

[0071] Figure 6 for Figure 2 Enlarged structural diagram at point A in the middle;

[0072] Figure 7 for Figure 1 Enlarged structural diagram at point B;

[0073] Figure 8 This is a schematic diagram of the U-shaped rod structure of the chain anti-loosening device for the scraper conveyor and its usage method proposed in this invention.

[0074] In the diagram: 1. Conveyor housing; 2. Conveyor chain; 3. Conveyor scraper; 4. Guide port; 5. Guide plate; 6. Tensioning sprocket; 71. Mounting box; 72. Metal plate; 73. Coil; 74. Metal rod; 75. Magnetic sheet; 76. Wire; 8. Connecting frame; 9. Connecting plate; 101. Bracket; 102. Clamping gear; 103. Gripper; 104. Connecting cylinder; 105. Sliding magnetic plate; 106. Spring 1; 10 7. Connecting rod; 108. Fixed magnetic plate; 109. Connecting rack; 11. Metal sleeve; 12. Clearance opening; 13. U-shaped rod; 14. Linkage frame; 15. Spring II; 161. Fixed plate; 162. Indicator plate; 163. Drive shaft; 164. Driven bevel gear; 165. Indicator needle; 166. Rotating shaft; 167. Transmission gear; 168. Drive bevel gear; 169. Drive rack; 17. Clamping plate. Detailed Implementation

[0075] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0076] Reference Figures 1-8The chain anti-loosening device for the scraper conveyor includes a conveyor housing 1; two sets of conveyor chains 2 symmetrically arranged on the inner wall of the conveyor housing 1; several conveyor scrapers 3 evenly distributed on the two sets of conveyor chains 2; two guide openings 4 symmetrically opened on the side of the conveyor housing 1; two guide plates 5 slidably installed on the inner wall of the two guide openings 4 respectively; two tension sprockets 6 rotatably installed on one end of the two guide plates 5 located inside the conveyor housing 1 respectively, and the tension sprockets 6 mesh with the conveyor chains 2; and two sets of tensioning components symmetrically arranged on the conveyor housing 1 corresponding to the two guide plates 5. The conveyor housing 1 is equipped with: two connecting frames 8, symmetrically fixedly installed on the conveyor box 1; two connecting plates 9, respectively fixedly installed at the ends of the two connecting frames 8, with the connecting plates 9 positioned above the tensioning components; six clamping components, arranged in a linear array of three groups on the sides of the two connecting plates 9; six metal sleeves 11, respectively installed on the six clamping components; four clearance openings 12, symmetrically arranged in pairs on the conveyor box 1; two U-shaped rods 13, respectively slidably installed on the inner walls of the clearance openings 12 on both sides; and four linkage frames 14, respectively fixedly installed on the two U-shaped rods 13. Located at one end inside the conveyor housing 1, and with the linkage frame 14 adapted to the conveyor chain 2, the inner wall of the linkage frame 14 is coated with lubricating oil; four springs 15 are respectively fixedly installed between the bottom surfaces of the two ends of the two U-shaped rods 13 and the inner bottom surfaces of the four clearance openings 12; two sets of indicating components are symmetrically arranged on the conveyor housing 1; in use, the conveyor chain 2 can run in the conveyor housing 1 to drive the conveyor scraper 3 to transport materials. During the operation of the conveyor chain 2, the tension sprocket 6 can tension the conveyor chain 2. If the conveyor chain 2 becomes loose, under the action of gravity... The U-shaped rod 13 will slide downwards and press down on the linkage frame 14, causing the linkage frame 14 and U-shaped rod 13 to slide downwards along the clearance opening 12. During the downward sliding of the U-shaped rod 13, it can trigger the clamping component at the corresponding position, thereby causing the metal sleeve 11 to fall down and cooperate with the tensioning component to push the tensioning sprocket 6, so that the tensioning sprocket 6 can tension the conveyor chain 2, ensuring that the conveyor chain 2 can be used stably. During the sliding process of the U-shaped rod 13, the tension of the conveyor chain 2 can be displayed through the indicator component, so that the staff can observe and understand it in a timely manner.

[0077] Reference Figure 3 , Figure 4The tensioning assembly includes: a mounting box 71, fixedly mounted on the side of the conveyor box 1 above the guide plate 5; a metal plate 72, fixedly mounted on the bottom surface of the mounting box 71, and the metal plate 72 is connected to the interior of the mounting box 71; a coil 73, disposed on the inner wall of the mounting box 71; a metal rod 74, fixedly mounted on the top surface of the metal plate 72, the metal rod 74 and the metal sleeve 11 being coaxially arranged; a magnetic sheet 75, fixedly mounted on the top surface of the guide plate 5, the metal plate 72 and the magnetic sheet 75 being opposite each other; two wires 76, electrically connected to the two ends of the coil 73 respectively; the metal sleeve 11 can fall onto the outer wall of the metal rod 74 in the mounting box 71, and the bottom surface of the metal sleeve 11 can be in contact with the top surface of the metal plate 72, since the coil 73 in the mounting box 71 is connected to the two ends of the coil 73 by the wires 76. When the coil 73 is energized, the metal rod 74 and the metal sleeve 11 are located inside the coil 73. When the metal sleeve 11 has not fallen off, the metal rod 74 and the metal plate 72 can generate magnetic force after the coil 73 is energized. The magnetic poles of the metal plate 72 and the magnetic sheet 75 are the same. Therefore, under the action of repulsive magnetic force, the guide plate 5 can be pressed tightly, thereby making the tensioning sprocket 6 tension the conveyor chain 2. After the metal sleeve 11 falls to the outer wall of the metal rod 74, the magnetic force generated by the metal plate 72 is stronger, which can further push the guide plate 5, making the tensioning sprocket 6 further tension the conveyor chain 2. With the movement of the U-shaped rod 13, the conveyor chain 2 can be relaxed to different degrees, causing the corresponding metal sleeve 11 to fall off, ensuring that the tensioning sprocket 6 can tension the conveyor chain 2 more accurately.

[0078] Reference Figure 1 , Figure 5 , Figure 8The clamping assembly includes: two brackets 101, symmetrically fixedly mounted on the side of the connecting plate 9; two clamping gears 102, respectively rotatably mounted on the ends of the two brackets 101 away from the connecting plate 9, and the two clamping gears 102 meshing; two grippers 103, respectively fixedly mounted on the top surfaces of the two clamping gears 102, and each end of the grippers 103 away from the clamping gears 102 is provided with a clamping plate 17 adapted to the metal sleeve 11; a connecting cylinder 104, fixedly mounted on the side of the connecting plate 9; a sliding magnetic plate 105, slidably mounted on the inner wall of the open end of the connecting cylinder 104; a spring 106, fixedly mounted between the sliding magnetic plate 105 and the inner wall of the connecting cylinder 104; a connecting rod 107, fixedly mounted on the end of the sliding magnetic plate 105 located outside the connecting cylinder 104; a connecting rack 109, fixedly mounted on the end of the connecting rod 107 away from the sliding magnetic plate 105, and the connecting rack 109 meshing with the clamping gears 102; and a fixed magnetic plate. 108 is fixedly installed on the side of the U-shaped rod 13. The magnetic poles of the fixed magnetic plate 108 and the sliding magnetic plate 105 are the same. When the conveyor chain 2 becomes loose, it presses the linkage frame 14 and drives the U-shaped rod 13 to slide downward. When the fixed magnetic plate 108 on the side of the U-shaped rod 13 slides to the position opposite to the sliding magnetic plate 105, since the magnetic poles of the fixed magnetic plate 108 and the sliding magnetic plate 105 are the same, the sliding magnetic plate 105 can slide along the connecting cylinder 104 under the action of magnetic repulsion. It also drives the connecting rack 109 to move through the connecting rod 107. The connecting rack 109 meshes with the clamping gear 102, which in turn drives one clamping gear 102 to rotate. Since the two clamping gears 102 mesh with each other, the two clamping gears 102 can rotate in opposite directions. This allows the metal sleeve 11 to be released through the gripper 103 and the clamping plate 17, so that the metal sleeve 11 falls downward under the action of gravity.

[0079] Reference Figure 2 , Figure 7 The indicating component includes: a fixed plate 161, fixedly installed on the side of the conveyor box 1; an indicating plate 162, fixedly installed at the end of the fixed plate 161 away from the conveyor box 1, the indicating plate 162 being a quarter circle; a drive shaft 163, rotatably installed at one corner of the top surface of the indicating plate 162; an indicating needle 165, fixedly fitted at the bottom end of the drive shaft 163, the top surface of the indicating plate 162 having scale lines adapted to the indicating needle 165; a driven bevel gear 164, fixedly installed at the top of the drive shaft 163; and a linkage mechanism, located between the driven bevel gear 164 and the U-shaped rod 13. When the driven bevel gear 164 is rotated by the linkage mechanism, the drive shaft 163 and the indicating needle 165 can be rotated. The interaction between the indicating needle 165 and the scale lines on the top surface of the indicating plate 162 allows workers to have a timely and intuitive understanding of the looseness of the conveyor chain 2.

[0080] Reference Figure 7The linkage mechanism includes: a rotating shaft 166, rotatably mounted on the side of the conveyor housing 1; a transmission gear 167, fixedly mounted on the rotating shaft 166; a drive bevel gear 168, fixedly mounted on the end of the rotating shaft 166, and meshing with the driven bevel gear 164; and a drive rack 169, fixedly mounted on the side of the U-shaped rod 13, and meshing with the transmission gear 167. During the movement of the U-shaped rod 13, the drive rack 169 can be moved, and the drive rack 169 meshes with the transmission gear 167, thereby driving the transmission gear 167, the rotating shaft 166, and the drive bevel gear 168 to rotate.

[0081] The method for using the chain anti-loosening device of the scraper conveyor, based on the above-mentioned chain anti-loosening device of the scraper conveyor, includes the following steps:

[0082] Step 1: When the conveyor chain 2 is loose, the linkage frame 14 is pressed to make the U-shaped rod 13 slide down. The fixed magnetic plate 108 on the side of the U-shaped rod 13 and the sliding magnetic plate 105 repel each other, which drives the connecting rack 109 to move, thereby rotating the clamping gear 102 to release the metal sleeve 11 and make it fall.

[0083] Step 2: After the metal sleeve 11 falls off, it sticks to the metal plate 72. The energized coil 73 causes the metal rod 74 and the metal plate 72 to generate magnetic repulsion. The presence of the metal sleeve 11 affects the magnitude of the magnetic force, thereby adjusting the tension of the guide plate 5 on the conveyor chain 2. The more sleeves fall off, the stronger the magnetic force and the more obvious the tensioning effect.

[0084] Step 3: The U-shaped rod 13 moves to drive the drive rack 169. Through the meshing of the transmission gear 167 and the bevel gear, the indicator needle 165 rotates. The operator can intuitively understand the slack of the conveyor chain 2 through the scale lines on the indicator needle 165 and the indicator plate 162.

[0085] The specific working principle of this invention is as follows:

[0086] In use, the conveyor chain 2 can run in the conveyor box 1 to drive the conveyor scraper 3 to transport materials. During the operation of the conveyor chain 2, the tension sprocket 6 can tension the conveyor chain 2. If the conveyor chain 2 becomes loose, it will fall downward under the action of gravity and press the linkage frame 14, causing the linkage frame 14 and the U-shaped rod 13 to slide downward along the clearance opening 12. During the downward sliding of the U-shaped rod 13, it can trigger the clamping component at the corresponding position, thereby causing the metal sleeve 11 to fall and cooperate with the tensioning component to push the tension sprocket 6, so that the tension sprocket 6 can tension the conveyor chain 2, ensuring that the conveyor chain 2 can be used stably. During the sliding of the U-shaped rod 13, the tension of the conveyor chain 2 can be displayed through the indicator component, so that the staff can observe and understand in a timely manner.

[0087] Specifically, when the conveyor chain 2 becomes loose, it presses the linkage frame 14 and drives the U-shaped rod 13 to slide downward. When the fixed magnetic plate 108 on the side of the U-shaped rod 13 slides to a position opposite to the sliding magnetic plate 105, since the magnetic poles of the fixed magnetic plate 108 and the sliding magnetic plate 105 are the same, the sliding magnetic plate 105 can slide along the connecting cylinder 104 under the action of magnetic repulsion. It also drives the connecting rack 109 to move through the connecting rod 107. The connecting rack 109 meshes with the clamping gear 102, which in turn drives one of the clamping gears 102 to rotate. Since the two clamping gears 102 mesh with each other, the two clamping gears 102 can rotate in opposite directions. This allows the metal sleeve 11 to be released through the gripper 103 and the clamping plate 17, so that the metal sleeve 11 falls downward under the action of gravity.

[0088] The metal sleeve 11 can fall onto the outer wall of the metal rod 74 inside the mounting box 71, and the bottom surface of the metal sleeve 11 can be in contact with the top surface of the metal plate 72. Since the coil 73 inside the mounting box 71 is energized through the wire 76, and the metal rod 74 and the metal sleeve 11 are located inside the coil 73, when the metal sleeve 11 is not falling, the metal rod 74 and the metal plate 72 can generate magnetic force after the coil 73 is energized. Furthermore, the magnetic poles of the metal plate 72 and the magnetic sheet 75 are the same, so they repel each other. Under the action of force, the guide plate 5 can be pressed up, thereby causing the tensioning sprocket 6 to tension the conveyor chain 2. After the metal sleeve 11 falls to the outer wall of the metal rod 74, the magnetic force generated by the metal plate 72 is stronger, which can further push the guide plate 5, causing the tensioning sprocket 6 to further tension the conveyor chain 2. With the movement of the U-shaped rod 13, the conveyor chain 2 can be relaxed to different degrees, causing the corresponding metal sleeve 11 to fall down, ensuring that the tensioning sprocket 6 can tension the conveyor chain 2 more accurately.

[0089] Meanwhile, as the U-shaped rod 13 moves, it can drive the drive rack 169 to move. The drive rack 169 meshes with the transmission gear 167, which in turn drives the transmission gear 167, the rotating shaft 166, and the drive bevel gear 168 to rotate. The drive bevel gear 168 meshes with the driven bevel gear 164, which in turn drives the transmission shaft 163 and the indicator needle 165 to rotate. Thus, the use of the indicator needle 165 and the scale lines on the top surface of the indicator plate 162 allows the staff to have a timely and intuitive understanding of the looseness of the conveyor chain 2.

[0090] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A chain anti-loosening device for a scraper conveyor, characterized in that, include: Conveyor housing; Two sets of conveyor chains are symmetrically arranged on the inner wall of the conveyor box; Several conveying scrapers are evenly spaced and arranged on the two sets of conveying chains; Two guide openings are symmetrically provided on the side of the conveyor box; Two guide plates are slidably installed on the inner walls of the two guide ports, respectively; Two tension sprockets are respectively rotatably installed at one end of the two guide plates located inside the conveyor box, and the tension sprockets mesh with the conveyor chain; Two sets of tensioning components are symmetrically arranged on the conveyor box at positions corresponding to the two guide plates; Two connecting frames are symmetrically and fixedly installed on the conveyor box; Two connecting plates are respectively fixedly installed at the ends of the two connecting frames, and the connecting plates are located above the tensioning assembly; Six clamping components are arranged in a linear array of three groups on the sides of the two connecting plates; Six metal sleeves are respectively disposed on the six clamping assemblies; Four clearance openings are symmetrically arranged in pairs on the conveyor box; Two U-shaped rods are slidably installed on the inner walls of the clearance openings on both sides; Four linkage frames are fixedly installed in pairs at one end of the two U-shaped rods located inside the conveyor box, and the linkage frames are adapted to the conveyor chain; Four springs are respectively fixedly installed between the bottom surfaces of the two ends of the two U-shaped rods and the inner bottom surfaces of the four clearance openings; Two sets of indicator components are symmetrically arranged on the conveyor box; The tensioning component includes: The mounting box is fixedly installed on the side of the conveyor box above the guide plate; A metal plate is fixedly installed on the bottom surface of the mounting box, and the metal plate is in communication with the interior of the mounting box; An energized coil is disposed on the inner wall of the mounting box; A metal rod is fixedly installed on the top surface of the metal plate; A magnetic sheet is fixedly installed on the top surface of the guide plate; Two wires are electrically connected to the two ends of the energized coil, respectively; The metal plate and the magnetic sheet have the same magnetic poles facing each other; When the conveyor chain becomes loose, it will fall downwards and press against the linkage frame, causing the linkage frame and U-shaped rod to slide downwards along the clearance opening. During the downward sliding of the U-shaped rod, it triggers the clamping component at the corresponding position, causing the metal sleeve to fall onto the outer wall of the metal rod. The bottom surface of the metal sleeve is in contact with the top surface of the metal plate. The metal sleeve, together with the tensioning component, pushes the tensioning sprocket, causing the tensioning sprocket to tension the conveyor chain.

2. The chain anti-loosening device for the scraper conveyor according to claim 1, characterized in that, The metal rod and the metal sleeve are coaxially arranged, and the metal plate is opposite to the magnetic sheet.

3. The chain anti-loosening device for the scraper conveyor according to claim 1, characterized in that, The clamping assembly includes: Two brackets are symmetrically fixedly installed on the side of the connecting plate; Two clamping gears are rotatably mounted on the ends of the two brackets away from the connecting plate, and the two clamping gears are meshed. Two grippers are respectively fixedly installed on the top surfaces of the two gripping gears; A connecting cylinder is fixedly installed on the side of the connecting plate; A sliding magnetic plate is slidably installed on the inner wall of the open end of the connecting cylinder; Spring 1 is fixedly installed between the sliding magnetic plate and the inner wall of the connecting cylinder; The connecting rod is fixedly installed at one end of the sliding magnetic plate located outside the connecting cylinder; A connecting rack is fixedly installed at the end of the connecting rod away from the sliding magnetic plate, and the connecting rack meshes with the clamping gear; A fixed magnetic plate is fixedly installed on the side of the U-shaped rod.

4. The chain anti-loosening device for the scraper conveyor according to claim 3, characterized in that, The fixed magnetic plate and the sliding magnetic plate have the same magnetic poles opposite each other, and each of the two grippers is provided with a clamping plate adapted to the metal sleeve at the end away from the clamping gear.

5. The chain anti-loosening device for the scraper conveyor according to claim 3, characterized in that, The indicating component includes: A fixing plate is fixedly installed on the side of the conveyor box; An indicator plate is fixedly installed at the end of the fixed plate away from the conveyor box; The drive shaft is rotatably mounted at one corner of the top surface of the indicator plate; The indicator needle is fixedly mounted on the bottom end of the drive shaft; The driven bevel gear is fixedly mounted on the top end of the drive shaft; The linkage mechanism is located between the driven bevel gear and the U-shaped rod.

6. The chain anti-loosening device for the scraper conveyor according to claim 5, characterized in that, The linkage mechanism includes: A rotating shaft is rotatably mounted on the side of the conveyor housing; The transmission gear is fixedly mounted on the rotating shaft; A drive bevel gear is fixedly mounted on the end of the rotating shaft, and the drive bevel gear meshes with the driven bevel gear; A drive rack is fixedly mounted on the side of the U-shaped rod, and the drive rack meshes with the transmission gear.

7. The chain anti-loosening device for a scraper conveyor according to claim 6, characterized in that, The indicator plate is a quarter circle, and the top surface of the indicator plate is provided with scale lines that are compatible with the indicator needle.

8. The chain anti-loosening device for the scraper conveyor according to claim 1, characterized in that, The inner wall of the linkage frame is coated with lubricating oil.

9. A method for using a chain anti-loosening device for a scraper conveyor, comprising the chain anti-loosening device for a scraper conveyor as described in any one of claims 6-7, characterized in that... Includes the following steps: Step 1: When the conveyor chain becomes loose, the pressure linkage frame causes the U-shaped rod to slide down. The fixed magnetic plate on the side of the U-shaped rod and the sliding magnetic plate repel each other, which drives the connecting rack to move, thereby rotating the clamping gear to release the metal sleeve and make it fall. Step 2: After the metal sleeve falls off, it adheres to the metal plate. The energized coil causes the metal rod and metal plate to generate a magnetic force, which repels the magnetic sheet. The presence of the metal sleeve affects the strength of the magnetic force, thereby adjusting the tension of the guide plate and the conveyor chain. The more sleeves fall off, the stronger the magnetic force and the more obvious the tensioning effect. Step 3: The U-shaped rod moves to drive the rack and pinion, which in turn rotates the indicator needle through the meshing of the transmission gear and bevel gear. The operator can visually understand the slack of the conveyor chain by looking at the indicator needle and the scale lines on the indicator plate.

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