Chain anti-loosening device of scraper conveyor and using method of chain anti-loosening device

Abstract

The invention relates to the technical field of chain looseness prevention, and discloses a chain looseness prevention device of a scraper conveyor and a using method of the chain looseness prevention device. The two groups of conveying chains are symmetrically arranged on the inner wall of the conveying case; the plurality of conveying scrapers are distributed on the two groups of conveying chains at equal intervals; the two guide openings are symmetrically formed in the side face of the conveying machine box. The two guide plates are slidably mounted on the inner walls of the two guide openings respectively; according to the tensioning device, accurate control over tensioning of the conveying chain is achieved through the magnetic force effect generated by energization of the coil, the metal rod, the metal sleeve and the metal plate, when the conveying chain is loosened, the metal sleeve falls off to enhance the magnetic force, and therefore the guide plate is further jacked to enable the tensioning chain wheel to tighter tension the chain, and the tensioning effect is improved. The magnetic induction tensioning mode is accurate, flexible adjustment can be conducted according to the looseness degree of the chain, and stable operation of the conveying chain is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of chain loosening prevention, and in particular to a chain loosening prevention device for a scraper conveyor and a use method thereof. Background Art

[0002] Scraper conveyor is mainly used for short-distance material transportation at a horizontal or inclined angle of no more 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 industries to transport materials such as coal, iron ore, copper ore, coke, cement clinker, gypsum, grain, feed, sludge, dust and coal powder.

[0003] After searching, the Chinese patent with the announcement number CN115783648B discloses a chain anti-loosening device for a compact chain scraper conveyor, which relates to the technical field of scraper conveyor accessories, including a support component, a drive component, a tension adjustment component, a chain component and a tensioning component. The present invention sets a support component, and the drive component and the tension adjustment component are respectively set at both ends of the support component. A chain component is set between the drive component and the tension adjustment component. The tension adjustment component includes a fixed sprocket, a guide sprocket and an adjustment roller. The adjustment roller moves in a circle around the guide sprocket. By adjusting the position of the adjustment roller, the adjustment roller drives the chain component to move, and the tightness of the chain component can be adjusted. At the same time, since the spacing between the adjustment roller and the guide sprocket remains fixed, the adjustment of the chain component during operation is achieved through the adjustment roller, thereby simplifying the adjustment process of the scraper conveyor chain. However, this solution still has the following shortcomings when it is actually used:

[0004] The chain tension adjustment of the scraper conveyor is a crucial link. However, this link is currently mainly carried out manually. Manual adjustment usually relies on the operator's experience and intuitive observation. This adjustment method lacks accuracy and stability, and it is difficult to ensure that each adjustment can reach the best state. If the chain is not adjusted properly and looseness occurs, the transmission efficiency will be significantly reduced, affecting the overall performance and work efficiency of the scraper conveyor. On the contrary, if the chain is adjusted too tight, although it seems to avoid the problem of looseness, it will actually cause greater friction resistance, which will not only increase energy consumption, but also accelerate the wear of the chain and sprocket, shortening the service life of the equipment.

[0005] Therefore, it is necessary to design a chain anti-loosening device for a scraper conveyor and a method of using the same to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a chain anti-loosening device for a scraper conveyor and a method of using the same.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

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

[0009] Conveyor chassis;

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

[0011] A plurality of conveying scrapers are arranged at equal intervals on the two groups of conveying chains;

[0012] Two guide openings are symmetrically opened on the sides of the conveyor box;

[0013] Two guide plates are slidably mounted on the inner walls of the two guide openings respectively;

[0014] Two tensioning sprockets are rotatably mounted on one end of the two guide plates located inside the conveyor box, and the tensioning sprockets are meshed 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 fixedly mounted on the conveyor box;

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

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

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

[0020] Four clearance openings are symmetrically arranged in groups of two on the conveyor box;

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

[0022] Four linkage frames are respectively fixedly mounted on 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 2 are respectively fixedly mounted between the bottom surfaces of both ends of the two U-shaped rods and the inner bottom surfaces of the four clearance openings;

[0024] Two groups of indicating components are symmetrically arranged on the conveyor box.

[0025] As a preferred technical solution of the present invention, the tensioning assembly comprises:

[0026] An installation box is fixedly installed on the side of the conveyor box at a position above the guide plate;

[0027] A metal plate is fixedly mounted on the bottom surface of the installation box, and the metal plate is communicated with the interior of the installation box;

[0028] A coil is arranged on the inner wall of the installation box;

[0029] A metal rod, fixedly mounted on the top surface of the metal plate;

[0030] A magnetic sheet, fixedly mounted on the top surface of the guide plate;

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

[0032] As a preferred technical solution of the present invention, the metal rod and the metal sleeve are coaxially arranged, and the metal plate is opposite to the magnetic sheet.

[0033] As a preferred technical solution of the present invention, the clamping assembly comprises:

[0034] Two brackets are symmetrically fixedly mounted on the sides of the connecting plate;

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

[0036] Two clamping claws are respectively fixedly mounted on the top surfaces of the two clamping gears;

[0037] A connecting tube, fixedly mounted on the side of the connecting plate;

[0038] A sliding magnetic plate is slidably mounted on the inner wall of the opening end of the connecting tube;

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

[0040] A connecting rod, fixedly mounted on one end of the sliding magnetic plate located outside the connecting cylinder;

[0041] A connecting rack is fixedly mounted on an end of the connecting rod away from the sliding magnetic plate, and the connecting rack is meshed with the clamping gear;

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

[0043] As a preferred technical solution of the present invention, the relative magnetic poles of the fixed magnetic plate and the sliding magnetic plate are the same, and the ends of the two clamping jaws away from the clamping gear are each provided with a clamping plate adapted to the metal sleeve.

[0044] As a preferred technical solution of the present invention, the indication component includes:

[0045] A fixing plate, fixedly mounted on the side of the conveyor box;

[0046] An indicator plate, fixedly mounted on the end of the fixed plate away from the conveyor box;

[0047] A transmission shaft, rotatably mounted at an angle on the top surface of the indicator plate;

[0048] An indicator needle, fixedly sleeved on the bottom end of the transmission shaft;

[0049] A driven bevel gear, fixedly mounted on the top end of the transmission shaft;

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

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

[0052] A rotating shaft, rotatably mounted on a side of the conveyor box;

[0053] A transmission gear, fixedly sleeved on the rotating shaft;

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

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

[0056] As a preferred technical solution of the present invention, the indicator plate is in the shape of a quarter circle, and a scale line matching the indicator needle is provided on the top surface of the indicator plate.

[0057] As a preferred technical solution 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, according to the above-mentioned chain anti-loosening device of the scraper conveyor, comprises the following steps:

[0059] Step 1: When the conveyor chain is loose, the linkage frame is pressed to make the U-shaped rod slide down, and the fixed magnetic plate and the sliding magnetic plate on the side of the U-shaped rod repel each other, driving the connecting rack to move, and then rotating the clamping gear to loosen the metal sleeve and make it fall;

[0060] Step 2: After the metal sleeve falls, it fits with the metal plate. The energized coil causes the metal rod and the metal plate to generate magnetic repulsion. The presence of the metal sleeve affects the size of the magnetic force, and then adjusts the guide plate to tension the conveyor chain. The more the sleeve falls, 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 the indicator needle rotates through the meshing of the transmission gear and the bevel gear. The staff can intuitively understand the slack of the conveyor chain through the indicator needle and the scale lines on the indicator plate.

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

[0063] 1. By setting the tensioning assembly and the tensioning sprocket, the magnetic force generated by the coil energized and the metal rod, metal sleeve and metal plate is used to achieve precise control of the tensioning of the conveyor chain. When the conveyor chain is loose, the falling of the metal sleeve causes the magnetic force to increase, thereby further pushing the guide plate to make the tensioning sprocket tighten the chain more tightly. This magnetic tensioning method is not only accurate, but also can be flexibly adjusted according to the degree of chain relaxation, ensuring the stable operation of the conveyor chain;

[0064] 2. By setting the clamping assembly and the metal sleeve, the linkage frame trigger can realize automatic detection and response when the conveyor chain is loose. When the conveyor chain is loose and presses the linkage frame, the linkage frame and the U-shaped rod slide down along the clearance opening, triggering the clamping assembly to release the metal sleeve. This process does not require manual intervention and realizes automatic operation. At the same time, it has high reliability and can accurately reflect the loose state of the chain;

[0065] 3. By setting up the U-shaped rod and the indicator assembly, and by using the driving rack, transmission gear, bevel gear and indicator needle and other components in coordination, an intuitive display of the looseness of the conveyor chain is achieved. When the U-shaped rod moves, it drives the driving rack to move and triggers the linkage mechanism to rotate the indicator needle. The staff can intuitively understand the looseness of the chain by observing the indicator needle and the scale line on the top surface of the indicator plate. This indication method is not only intuitive and easy to understand, but also can promptly remind the staff to take corresponding measures to ensure the stability and safety of the conveyor chain. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 A three-dimensional structural schematic diagram of a chain anti-loosening device for a scraper conveyor and a method of using the same proposed by the present invention;

[0067] Figure 2 It is a partial cross-sectional structural schematic diagram of the chain anti-loosening device of the scraper conveyor and the use method thereof proposed by the present invention;

[0068] Figure 3 A schematic diagram of the tensioning sprocket and connecting plate structure of the chain anti-loosening device of the scraper conveyor and the use method thereof proposed by the present invention;

[0069] Figure 4 This is a schematic diagram of the installation box structure of the chain anti-loosening device of the scraper conveyor and the use method thereof proposed by the present invention;

[0070] Figure 5 A schematic diagram of the structure of a clamping assembly of a chain anti-loosening device for a scraper conveyor and a method of using the same proposed by the present invention;

[0071] Figure 6 for Figure 2 The enlarged structural diagram at A in the middle;

[0072] Figure 7 for Figure 1 The enlarged structural diagram at B in the middle;

[0073] Figure 8 The present invention provides a schematic diagram of the U-shaped rod structure of the chain anti-loosening device of the scraper conveyor and the use method thereof.

[0074] In the figure: 1, conveyor box; 2, conveyor chain; 3, conveyor scraper; 4, guide port; 5, guide plate; 6, tensioning sprocket; 71, installation 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, clamping claw; 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. Make way; 13. U-shaped rod; 14. Linkage frame; 15. Spring 2; 161. Fixed plate; 162. Indicator plate; 163. Transmission shaft; 164. Driven bevel gear; 165. Indicator needle; 166. Rotating shaft; 167. Transmission gear; 168. Driving bevel gear; 169. Driving rack; 17. Clamp. DETAILED DESCRIPTION

[0075] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0076] Reference Figure 1-8The chain anti-loosening device of the scraper conveyor comprises a conveyor box 1; two groups of conveyor chains 2 are symmetrically arranged on the inner wall of the conveyor box 1; a plurality of conveyor scrapers 3 are evenly spaced and arranged on the two groups of conveyor chains 2; two guide openings 4 are symmetrically opened on the side of the conveyor box 1; two guide plates 5 are respectively slidably installed on the inner walls of the two guide openings 4; two tensioning sprockets 6 are respectively rotatably installed on one end of the two guide plates 5 located on the inner side of the conveyor box 1, and the tensioning sprockets 6 are meshed with the conveyor chains 2; two groups of tensioning components are symmetrically arranged on the conveyor box 1 at the corresponding positions of the two guide plates 5 Two connecting frames 8 are symmetrically fixedly installed on the conveyor box 1; two connecting plates 9 are respectively fixedly installed at the ends of the two connecting frames 8, and the connecting plates 9 are located above the tensioning assembly; six clamping assemblies are arranged in a linear array on the sides of the two connecting plates 9 in groups of three-three; six metal sleeves 11 are respectively arranged on the six clamping assemblies; four clearance openings 12 are symmetrically opened in groups of two-two on the conveyor box 1; two U-shaped rods 13 are respectively slidably installed on the inner walls of the clearance openings 12 on both sides; four linkage frames 14 are respectively fixedly installed on the two U-shaped rods 13 Located at one end of the inner side of the conveyor box 1, the linkage frame 14 is adapted to the conveyor chain 2, and 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 groups of indicator components are symmetrically arranged on the conveyor box 1; when in use, the conveyor chain 2 can run in the conveyor box 1 to drive the conveyor scraper 3 to run to transport the material. During the operation of the conveyor chain 2, the tensioning 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 can slide downward along the clearance opening 12, and the clamping assembly at the corresponding position can be triggered during the downward sliding of the U-shaped rod 13, so that the metal sleeve 11 falls and cooperates with the tensioning assembly to push the tensioning sprocket 6, so that the tensioning sprocket 6 can tension the conveying chain 2, ensuring that the conveying chain 2 can be used stably, and the U-shaped rod 13 can display the tightness of the conveying chain 2 through the indicating assembly during the sliding process, so that the staff can watch and understand it in time.

[0077] Reference Figure 3 , Figure 4The tensioning assembly includes: an installation box 71, which is fixedly installed on the side of the conveyor box 1 and is located above the guide plate 5; a metal plate 72, which is fixedly installed on the bottom surface of the installation box 71, and the metal plate 72 is connected to the inside of the installation box 71; a coil 73, which is arranged on the inner wall of the installation box 71; a metal rod 74, which is fixedly installed on the top surface of the metal plate 72, and the metal rod 74 and the metal sleeve 11 are coaxially arranged; a magnetic sheet 75, which is fixedly installed on the top surface of the guide plate 5, and the metal plate 72 is opposite to the magnetic sheet 75; two wires 76, which are electrically connected to the two ends of the coil 73 respectively; the metal sleeve 11 can fall to the outer wall of the metal rod 74 in the installation box 71, and the bottom surface of the metal sleeve 11 can fit with the top surface of the metal plate 72, because the coil 73 in the installation box 71 is connected through the wire 7 6 is energized, and the metal rod 74 and the metal sleeve 11 are located on the inner side of 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, and the relative magnetic poles of the metal plate 72 and the magnetic sheet 75 are the same. Therefore, under the action of the repulsive magnetic force, the guide plate 5 can be tightened and the tensioning sprocket 6 can tension the conveying 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, so that the tensioning sprocket 6 can further tension the conveying chain 2. In conjunction with the movement of the U-shaped rod 13, the conveying chain 2 can relax to different degrees, which can cause the corresponding metal sleeve 11 to fall off, ensuring that the tensioning sprocket 6 can tighten the conveying 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 are meshed; two clamping claws 103, respectively fixedly mounted on the top surfaces of the two clamping gears 102, and the ends of the two clamping claws 103 away from the clamping gears 102 are provided with clamping plates 17 adapted to the metal sleeve 11; a connecting tube 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 tube 104; a spring 106, fixedly mounted between the sliding magnetic plate 105 and the inner wall of the connecting tube 104; a connecting rod 107, fixedly mounted on the end of the sliding magnetic plate 105 located outside the connecting tube 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 is meshed with the clamping gear 102; a fixed magnetic plate 108 is fixedly installed on the side of the U-shaped rod 13, and the relative magnetic poles of the fixed magnetic plate 108 and the sliding magnetic plate 105 are the same; when the conveying chain 2 is loosened, the linkage frame 14 is pressed to drive 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 relative position with the sliding magnetic plate 105, since the relative 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 tube 104 under the action of magnetic repulsion, and drive the connecting rack 109 to move through the connecting rod 107, and the connecting rack 109 is engaged with the clamping gear 102, and then a clamping gear 102 can be driven to rotate, and since the two clamping gears 102 are engaged with each other, the two clamping gears 102 can rotate in opposite directions, thereby loosening the metal sleeve 11 through the clamping claw 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 assembly comprises: a fixed plate 161, which is fixedly mounted on the side of the conveyor box 1; an indicating plate 162, which is fixedly mounted on the end of the fixed plate 161 away from the conveyor box 1, and the indicating plate 162 is a quarter circle; a transmission shaft 163, which is rotatably mounted at a corner position on the top surface of the indicating plate 162; an indicating needle 165, which is fixedly sleeved on the bottom end of the transmission shaft 163, and the top surface of the indicating plate 162 is provided with a scale line adapted to the indicating needle 165; a driven bevel gear 164, which is fixedly mounted on the top end of the transmission shaft 163; a linkage mechanism, which is arranged between the driven bevel gear 164 and the U-shaped rod 13; when the driven bevel gear 164 is driven to rotate by the linkage mechanism, the transmission shaft 163 and the indicating needle 165 can be driven to rotate, that is, the indicating needle 165 and the scale line on the top surface of the indicating plate 162 can be used in coordination to enable the staff to timely and intuitively understand the looseness of the conveyor chain 2.

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

[0081] The method for using the chain anti-loosening device of the scraper conveyor, according to the above-mentioned chain anti-loosening device of the scraper conveyor, comprises the following steps:

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

[0083] Step 2: After the metal sleeve 11 falls, it fits with 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 guide plate 5 to tighten the conveyor chain 2. The more the sleeve falls, the stronger the magnetic force and the more obvious the tensioning effect.

[0084] Step 3: The U-shaped rod 13 moves to drive the driving rack 169, and the indicator needle 165 rotates through the engagement of the transmission gear 167 and the bevel gear. The staff 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 the present invention is as follows:

[0086] When in use, the conveying chain 2 can run in the conveyor box 1 to drive the conveying scraper 3 to run to convey the materials. During the operation of the conveying chain 2, the tensioning sprocket 6 can tension the conveying chain 2. If the conveying chain 2 is loose, it will fall down under the action of gravity and press the linkage frame 14 to make the linkage frame 14 and the U-shaped rod 13 slide downward along the clearance opening 12. During the downward sliding of the U-shaped rod 13, the clamping assembly at the corresponding position can be triggered, so that the metal sleeve 11 falls and cooperates with the tensioning assembly to push the tensioning sprocket 6, so that the tensioning sprocket 6 can tension the conveying chain 2, ensuring that the conveying chain 2 can be used stably. During the sliding process, the U-shaped rod 13 can display the tightness of the conveying chain 2 through the indicating assembly, so that the staff can watch and understand it in time.

[0087] Specifically, when the conveying chain 2 is loose, the linkage frame 14 is pressed to drive 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 relative position with the sliding magnetic plate 105, since the relative 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 tube 104 under the action of magnetic repulsion, and drive the connecting rack 109 to move through the connecting rod 107, and the connecting rack 109 is meshed with the clamping gear 102, and then a clamping gear 102 can be driven to rotate, and since the two clamping gears 102 are meshed with each other, the two clamping gears 102 can rotate in opposite directions, thereby loosening the metal sleeve 11 through the clamping claw 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 to the outer wall of the metal rod 74 in the installation 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 installation box 71 is energized by the wire 76, and the metal rod 74 and the metal sleeve 11 are located on the inner side of the coil 73, when the metal sleeve 11 is not dropped, the metal rod 74 and the metal plate 72 can generate magnetic force after the coil 73 is energized, and the relative magnetic poles of the metal plate 72 and the magnetic sheet 75 are the same, so in the repulsive magnetic field, the metal plate 72 and the magnetic sheet 75 are in contact with each other. Under the action of the force, the guide plate 5 can be pushed up, so that the tensioning sprocket 6 can tension the conveying 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, and the guide plate 5 can be further pushed up, so that the tensioning sprocket 6 can further tension the conveying chain 2. With the movement of the U-shaped rod 13, the conveying chain 2 can be relaxed to different degrees, so that the corresponding metal sleeve 11 can fall, ensuring that the tensioning sprocket 6 can tension the conveying chain 2 more accurately.

[0089] At the same time, during the movement of the U-shaped rod 13, the driving rack 169 can be driven to move, and the driving rack 169 is engaged with the transmission gear 167, which can drive the transmission gear 167, the rotating shaft 166 and the driving bevel gear 168 to rotate, and the driving bevel gear 168 is engaged with the driven bevel gear 164, which can drive the transmission shaft 163 and the indicator needle 165 to rotate. The coordinated use of the indicator needle 165 and the scale lines on the top surface of the indicator plate 162 allows the staff to promptly and intuitively understand the looseness of the conveyor chain 2.

[0090] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. The chain anti-loosening device of the scraper conveyor is characterized by: include: Conveyor box (1); Two groups of conveyor chains (2) are symmetrically arranged on the inner wall of the conveyor box (1); A plurality of conveying scrapers (3) are arranged at equal intervals on the two groups of conveying chains (2); Two guide openings (4) are symmetrically arranged on the sides of the conveyor box (1); Two guide plates (5) are slidably mounted on the inner walls of the two guide openings (4); Two tensioning sprockets (6) are rotatably mounted on one end of the two guide plates (5) located inside the conveyor box (1), and the tensioning sprockets (6) are meshed with the conveyor chain (2); Two sets of tensioning components are symmetrically arranged on the conveyor box (1) at positions corresponding to the two guide plates (5); Two connecting frames (8) are symmetrically fixedly mounted on the conveyor box (1); Two connecting plates (9) are respectively fixedly mounted on the ends of the two connecting frames (8), and the connecting plates (9) are located above the tensioning assembly; Six clamping assemblies, arranged in groups of three to three in a linear array, are arranged on the sides of the two connecting plates (9); Six metal sleeves (11), respectively arranged on the six clamping assemblies; Four clearance openings (12) are symmetrically arranged in groups of two on the conveyor box (1); Two U-shaped rods (13) are slidably mounted on the inner walls of the clearance opening (12) at both sides; Four linkage frames (14) are respectively fixedly mounted on one end of the two U-shaped rods (13) located inside the conveyor box (1), and the linkage frames (14) are adapted to the conveyor chain (2); Four springs (15) are respectively fixedly mounted between the bottom surfaces of both ends of the two U-shaped rods (13) and the inner bottom surfaces of the four clearance openings (12); Two groups of indicating components are symmetrically arranged on the conveyor box (1).

2. The chain anti-loosening device of the scraper conveyor according to claim 1 is characterized in that: The tensioning assembly comprises: An installation box (71) is fixedly installed on the side of the conveyor box (1) at a position above the guide plate (5); A metal plate (72) is fixedly mounted on the bottom surface of the installation box (71), and the metal plate (72) is in communication with the interior of the installation box (71); A coil (73) is arranged on the inner wall of the installation box (71); A metal rod (74) fixedly mounted on the top surface of the metal plate (72); A magnetic sheet (75) fixedly mounted on the top surface of the guide plate (5); Two conducting wires (76) are electrically connected to two ends of the coil (73) respectively.

3. The chain anti-loosening device of the scraper conveyor according to claim 2 is characterized in that: The metal rod (74) and the metal sleeve (11) are coaxially arranged, and the metal plate (72) and the magnetic sheet (75) are opposite to each other.

4. The chain anti-loosening device of the scraper conveyor according to claim 1, characterized in that: The clamping assembly comprises: Two brackets (101) are symmetrically fixedly mounted on the side surfaces of the connecting plate (9); Two clamping gears (102) are rotatably mounted on one end of the two brackets (101) away from the connecting plate (9), and the two clamping gears (102) are meshed; Two clamping claws (103) are respectively fixedly mounted on the top surfaces of the two clamping gears (102); A connecting tube (104) is fixedly mounted on a side surface of the connecting plate (9); A sliding magnetic plate (105) is slidably mounted on the inner wall of the opening end of the connecting tube (104); Spring 1 (106), fixedly mounted between the sliding magnetic plate (105) and the inner wall of the connecting tube (104); A connecting rod (107) is fixedly mounted on one end of the sliding magnetic plate (105) located outside the connecting tube (104); A connecting rack (109) is fixedly mounted on an end of the connecting rod (107) away from the sliding magnetic plate (105), and the connecting rack (109) is meshed with the clamping gear (102); A fixed magnetic plate (108) is fixedly mounted on the side of the U-shaped rod (13).

5. The chain anti-loosening device of the scraper conveyor according to claim 4, characterized in that: The fixed magnetic plate (108) and the sliding magnetic plate (105) have the same magnetic poles relative to each other, and the ends of the two clamping jaws (103) away from the clamping gear (102) are each provided with a clamping plate (17) adapted to the metal sleeve (11).

6. The chain anti-loosening device of the scraper conveyor according to claim 1, characterized in that: The indication component comprises: A fixed plate (161) fixedly mounted on a side of the conveyor box (1); An indicator plate (162) is fixedly mounted on an end of the fixing plate (161) away from the conveyor box (1); A transmission shaft (163) is rotatably mounted at an angle on the top surface of the indicator plate (162); An indicator needle (165) is fixedly sleeved on the bottom end of the transmission shaft (163); A driven bevel gear (164) is fixedly mounted on the top end of the transmission shaft (163); A linkage mechanism is arranged between the driven bevel gear (164) and the U-shaped rod (13).

7. The chain anti-loosening device of the scraper conveyor according to claim 6, characterized in that: The linkage mechanism comprises: A rotating shaft (166) is rotatably mounted on a side of the conveyor box (1); A transmission gear (167) is fixedly mounted on the rotating shaft (166); A driving bevel gear (168) is fixedly mounted on the end of the rotating shaft (166), and the driving bevel gear (168) is meshed with the driven bevel gear (164); A driving rack (169) is fixedly mounted on the side of the U-shaped rod (13), and the driving rack (169) is meshed with the transmission gear (167).

8. The chain anti-loosening device of the scraper conveyor according to claim 7, characterized in that: The indicator plate (162) is in the shape of a quarter circle, and a scale line matching the indicator needle (165) is provided on the top surface of the indicator plate (162).

9. The chain anti-loosening device of the scraper conveyor according to claim 1, characterized in that: The inner wall of the linkage frame (14) is coated with lubricating oil.

10. A method for using a chain anti-loosening device for a scraper conveyor, according to the chain anti-loosening device for a scraper conveyor according to claims 1-9, characterized in that: The following steps are involved: Step 1: When the conveying chain (2) is loosened, the linkage frame (14) is pressed to make the U-shaped rod (13) slide down, and the fixed magnetic plate (108) and the sliding magnetic plate (105) on the side of the U-shaped rod (13) repel each other, driving the connecting rack (109) to move, and then rotating the clamping gear (102) to loosen the metal sleeve (11) and make it fall; Step 2: After the metal sleeve (11) falls, it fits with the metal plate (72), and 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 guide plate (5) to tension the conveyor chain (2). The more the sleeve falls, the stronger the magnetic force and the more obvious the tensioning effect. Step 3: The U-shaped rod (13) moves to drive the driving rack (169), and through the meshing of the transmission gear (167) and the bevel gear, the indicator needle (165) rotates. The staff can intuitively understand the slack of the conveyor chain (2) through the scale lines on the indicator needle (165) and the indicator plate (162).

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