A scraper chain-off fault handling device and method

Abstract

The application belongs to the technical field of transport machinery maintenance, and particularly relates to a scraper chain falling fault handling device and a handling method. The device solves the technical problem of time-consuming and laborious handling process caused by the lack of a tool for handling the chain falling of a scraper. The scraper chain falling fault handling device comprises a T-shaped support and a pair of back-pulling hook chain groups. A plurality of connecting ring hanging rod clamping legs for hanging the back-pulling hook chain groups are symmetrically arranged at the two ends of the crosspiece of the T-shaped support, and an arc-shaped shaft clamp is arranged at the bottom of the column of the T-shaped support. The axial direction of the arc-shaped shaft clamp is perpendicular to the plane formed by the T-shaped support, and the arc-shaped shaft clamp is connected with the column of the T-shaped support through the outer arc surface. Each back-pulling hook chain group comprises a positive and negative buckle lead screw pair pulling component and an adjusting chain and hook. Positive and negative buckle lead screw pair pulling components are respectively provided with positive and negative buckle internal thread holes at the front and rear ends, the positive buckle internal thread hole is matched with a positive buckle lead screw, and the negative buckle internal thread hole is matched with a negative buckle lead screw.

Description

Technical Field

[0001] This invention belongs to the field of transportation machinery maintenance technology, specifically a scraper conveyor chain drop fault handling device and handling method. Background Technology

[0002] The scraper conveyor operates in a harsh environment. Gas-liquid corrosion, particulate abrasion, and large foreign objects often cause equipment malfunctions and breakdowns, especially chain breakage and detachment, which can directly lead to production interruptions. Troubleshooting a detached scraper chain typically involves using a crowbar to pry it up, placing a hardwood rod between two symmetrical inner rings of the two scraper chains, or inserting a wooden block between the scraper chains in the head trough and the side rails. Then, the scraper conveyor is briefly started to force the detached chain back onto the wheel. However, during the start-up process, the crowbar, wooden rod, or wooden block may be ejected by the reaction force, potentially injuring workers. Therefore, maintenance procedures require that the machine be stopped, power disconnected, tagged, and locked before any maintenance is performed. This necessitates welding supports, using a chain hoist to pull the chain, and then cutting and dismantling the supports after the problem is resolved—a laborious and time-consuming process. Summary of the Invention

[0003] To address the current technical problem of the lack of a dedicated tool for handling chain breakage and chain drop in scraper conveyors, which leads to time-consuming and labor-intensive processing, this invention provides a scraper conveyor chain drop fault handling device and method.

[0004] The scraper conveyor chain drop fault handling device of the present invention is implemented by the following technical solution: A scraper conveyor chain drop fault handling device includes a T-shaped bracket and a pair of return hook chain groups; the crossbar of the T-shaped bracket 1 is symmetrically provided with multiple connecting ring hanging rod clips for hanging the return hook chain groups at both ends; the bottom of the T-shaped bracket column is provided with an arc-shaped shaft clip; the axial direction of the arc-shaped shaft clip is perpendicular to the plane formed by the T-shaped bracket and the arc-shaped shaft clip is connected to the T-shaped bracket column through the outer arc surface; Each pull-back hook chain assembly includes a long, cylindrical screw-pull member with positive and negative threads, an adjusting chain, and a chain hook. The screw-pull member has positive and negative internal thread holes at its front and rear ends, respectively. The positive internal thread hole is equipped with a positive screw rod, and the negative internal thread hole is equipped with a negative screw rod. One end of the positive and negative screw rods is screwed into the corresponding internal thread hole, and the other end is equipped with a connecting ring.

[0005] Furthermore, the positive and negative threaded screw tie rod is equipped with an assist rod in its circumferential direction.

[0006] Furthermore, the booster bar is also equipped with an extended booster sleeve.

[0007] Furthermore, the positive and negative threaded screw tie rod includes a positive threaded hexagonal nut and a negative threaded hexagonal nut located at the front and rear ends respectively, and multiple wing plates connecting the two hexagonal nuts; there are multiple assist rods installed vertically in the middle of the wing plates.

[0008] Furthermore, it also includes a connecting snap fastener, which includes a ring-shaped member with a notch, both ends of the notch having external threads, and a locking member with internal threads at the notch. The locking member is screwed onto the external threads at the notch and can realize the connection and disconnection of the notch.

[0009] Furthermore, stiffening plates are symmetrically connected at the connection between the crossbar and the column of the T-shaped bracket.

[0010] The present invention discloses a method for handling scraper conveyor chain drop faults, including the following steps: The bottom arc-shaped shaft clamp of the T-shaped bracket is secured to the scraper conveyor sprocket shaft. The screws of the two sets of positive and negative threaded screw tie members are adjusted to their furthest positions. Then, the connecting rings on one side of the two sets of positive and negative threaded screw tie members are symmetrically hooked onto the connecting ring hanging rods on both sides of the T-shaped bracket 1. The distance between the connecting rings should be greater than the diameter of the scraper conveyor sprocket. One adjusting chain and chain hook are hooked onto the scraper crossbar above the scraper conveyor sprocket, and the other adjusting chain and chain hook are hooked onto the scraper crossbar below the scraper conveyor sprocket. The lengths of the two sets of return hook chain groups are adjusted respectively, and the connecting slip is used to securely connect to the connecting rings on the other side of the positive and negative threaded screw tie members. At this time, the crossbar of the T-shaped bracket is kept in place. With the stop perpendicular to the scraper conveyor's running direction, simultaneously tighten the assist rods of the positive and negative threaded screws of the upper and lower sets of pull-back hook chain groups. Initially, when tightening the positive and negative threaded screws to pull back the scraper, ensure that the strokes of the positive and negative threaded screws are synchronized. After the two sets of pull-back hook chain groups are tightened synchronously, if it is difficult to tighten the assist rods of the positive and negative threaded screws, an extended assist rod can be used to increase the force. When using the extended assist rod to increase the force, pay attention to observing the adjusting chain and chain hook of the scraper crossbar to prevent disengagement. After the scraper conveyor chain links arch, use a pry bar to pry the chain links at the scraper conveyor sprocket to return them to their grooves. After the scraper conveyor chain links return to their positions, simultaneously loosen the upper and lower positive and negative threaded screws until the adjusting chain and chain hook of the scraper can be completely released. Remove all maintenance tools and store them in the warehouse for future use.

[0011] Furthermore, to ensure that the strokes of the positive and negative threaded screws are synchronized, one hand can turn the assist rod of the positive and negative threaded screw tie member, while the other hand assists in controlling the connecting ring on the connecting ring hanging rod clamp of the positive and negative threaded screw tie member.

[0012] Furthermore, for chain breakage faults, if the chain breakage location is at the head or tail of the scraper conveyor, the handling procedure is the same as for chain drop: pull back the upper and lower scrapers to arch the broken part of the chain, replace the broken chain part, and reconnect it.

[0013] Furthermore, for chain breakage faults, if the chain breakage is located in the middle of the scraper conveyor body, hook one end of each of the two sets of pull-back hook chain sets onto the connecting ring hanging rod clamp on the same side of the T-shaped bracket, which is equivalent to connecting them together. Then hook the other end of each of the two sets of pull-back hook chain sets onto the scrapers on both sides of the broken chain. This allows for quick pull-back of the scrapers. That is, by turning the positive and negative thread screws to pull the pull-back hook chain sets back the scrapers, the broken chain section of the chain arches up. Replace the broken chain part, reconnect, and complete the quick handling of the chain breakage fault.

[0014] The beneficial effects of this invention are: 1. Prevent the unauthorized operation of the scraper conveyor during maintenance to eliminate the risk of mechanical injury during maintenance operations.

[0015] 2. If there is no 'T-shaped bracket', a bracket must be welded, and then a chain hoist must be used to pull it back. After the maintenance is completed, the bracket must be cut and removed, which is time-consuming and laborious. The present invention effectively overcomes the above problems by providing a special device.

[0016] 3. The combination of a flexible connecting buckle and an adjustable chain allows for quick adjustment of the chain length, making it more convenient and faster than a chain hoist.

[0017] 4. For chain breakage faults in scraper conveyors, if the chain breakage is in the middle of the machine body, hook the two sets of hook chains together on the clamp on one side of the support, which is equivalent to connecting them together. Hook them on the scrapers on both sides of the broken chain, and the scrapers can be pulled back quickly to deal with the chain breakage fault. Attached Figure Description

[0018] Figure 1 A schematic diagram of the main structure of a scraper conveyor chain drop fault handling device according to the present invention.

[0019] Figure 2 Schematic diagram of the side structure of the T-shaped bracket (including the scraper conveyor sprocket and shaft).

[0020] Figure 3 Schematic diagram of the pullback hook chain assembly.

[0021] Figure 4 Schematic diagram of the connecting snap fastener structure.

[0022] Figure 5 Schematic diagram of the main structure of the positive and negative threaded screw tie member.

[0023] Figure 6 A side view of the tension member of the positive and negative threaded screw.

[0024] Figure 7 Schematic diagram for maintenance of a horizontal scraper conveyor.

[0025] Figure 8 Diagram of a scraper conveyor with a high-climbing head for maintenance.

[0026] Figure 9 A diagram illustrating the maintenance procedures when the broken chain is located in the middle of the scraper conveyor.

[0027] 1-T-type bracket, 2-connecting ring hanging rod clamp, 3-stiffening plate, 4-arc-shaped shaft clamp, 5-return hook chain assembly, 6-scraper conveyor sprocket shaft, 7-positive and negative threaded screw pull-out component, 8-adjusting chain and chain hook, 9-connecting snap fastener, 10-assist rod, 11-wing plate, 12-connecting ring, 13-positive threaded screw, 14-positive threaded hexagonal nut, 15-negative threaded screw, 16-negative threaded hexagonal nut, 17-extended assist rod, 18-chain drop, 19-chain break. Detailed Implementation

[0028] Example 1 Figure 1-3 As shown, a scraper conveyor chain drop fault handling device includes a T-shaped bracket 1 and a pair of return hook chain groups 5; the crossbars of the T-shaped bracket 1 are symmetrically provided with multiple connecting ring hanging rod clips 2 for hanging the return hook chain groups 5; the bottom of the column of the T-shaped bracket 1 is provided with an arc-shaped shaft clip 4, the axial direction of the arc-shaped shaft clip 4 is perpendicular to the plane formed by the T-shaped bracket 1, and the arc-shaped shaft clip 4 is connected to the column of the T-shaped bracket 1 through the outer arc surface; Each pull-back hook chain assembly 5 includes a long, cylindrical, positive and negative threaded screw pull member 7, an adjusting chain, and a chain hook 8. The positive and negative threaded screw pull member 7 has positive and negative internal threaded holes at its front and rear ends, respectively. The positive internal threaded hole is equipped with a positive threaded screw 13, and the negative internal threaded hole is equipped with a negative threaded screw 15. One end of the positive threaded screw 13 and the negative threaded screw 15 is screwed into the corresponding internal threaded hole, and the other end is fitted with a connecting ring 12. Ribs 3 are symmetrically connected at the connection between the crossbar and the column of the T-shaped bracket 1. One connecting ring is used to hang on the connecting ring hanging rod clamp 2, and the other is used to connect the adjusting chain and chain hook 8.

[0029] Example 2 Figure 5 , 6 As shown, the positive and negative threaded screw tie member 7 is equipped with an assist rod 10 in its circumferential direction; the assist rod 10 is also equipped with an extended assist sleeve 17. The assist rod and the extended assist sleeve 17 help to tighten the positive and negative threaded screw tie member 7.

[0030] Example 3 Figure 5 , 6 As shown, the lead screw tie member 7 includes a positive-threaded hexagonal nut 14 and a negative-threaded hexagonal nut 16 located at the front and rear ends, respectively, and multiple wing plates 11 connecting the two hexagonal nuts; multiple assist rods 10 are vertically installed in the middle of the wing plates 11. Preferably, there are three wing plates, which are connected to the hexagonal nuts at 120-degree intervals. This structure is simple and practical, and easy to assemble. Each wing plate 11 is connected to an assist rod 10.

[0031] Example 4 Figure 4As shown, the connecting snap 9 includes a ring-shaped piece with a notch. Both ends of the notch have external threads, and the notch is fitted with a locking member with internal threads. The locking member screws onto the external threads at the notch, enabling the notch to be connected or disconnected. This connecting snap is used to connect the connecting ring, the adjusting chain, and the chain hook 8 together. The length of the adjusting chain and chain hook 8 can be adjusted by selecting different chains on the adjusting chain and chain hook 8.

[0032] The following are specific implementation methods of this invention.

[0033] A maintenance tool is prefabricated, namely a T-shaped bracket 1 made of seamless steel pipe; multiple sets of connecting ring hanging rod clamps 2 are symmetrically installed at both ends of the head of the T-shaped bracket 1. During maintenance, the connecting ring hanging rod clamps 2 selected at both ends of the T-shaped bracket for the two sets of hook chains should be symmetrical, and their spacing should be greater than the diameter of the scraper conveyor head sprocket to ensure that the scraper chain will not get stuck on the sprocket when the scraper is pulled back; stiffening plates 3 are installed on both sides of the intersection of the T-shaped bracket; an arc-shaped shaft clamp 4 is installed at the bottom of the T-shaped bracket, the direction of which is the same as that of the T-shaped bracket column and crossbar. The diameter of the arc-shaped shaft clip is slightly larger than the diameter of the scraper conveyor sprocket shaft 6. Two sets of return hook chain groups 5 are made for backup. The return hook chain group 5 includes the following components: positive and negative thread screw pull component 7, adjusting chain and chain hook 8, and connecting buckle 9. The positive and negative thread screw pull component 7 includes: assist rod 10, wing plate 11 for connecting nut, connecting ring 12, positive thread screw 13, positive thread hexagonal nut 14, negative thread screw 15, negative thread hexagonal nut 16, and extended assist sleeve rod 17.

[0034] like Figure 7 , 8As shown, when the scraper chain links deviate from the sprocket during operation, resulting in a scraper conveyor chain drop fault, the machine should be stopped, the power cut off, a tag attached, and the machine locked. Loosen the tension screw of the scraper conveyor sprocket (some scraper conveyors have the tension screw located at the head of the machine). Secure the bottom arc-shaped shaft clip 4 of the T-shaped bracket 1 onto the scraper conveyor sprocket shaft (one person needs to temporarily hold and stabilize the T-shaped bracket). Adjust the screws of the two sets of positive and negative threaded screw tie members 7 to their furthest positions. Then, symmetrically hook the connecting rings on one side of the two sets of positive and negative threaded screw tie members 7 onto the connecting ring hanging rod clips 2 on both sides of the T-shaped bracket. The distance between the connecting rings should be greater than the diameter of the scraper conveyor sprocket. Hook one adjusting chain and chain hook 8 onto the scraper crossbar above the scraper conveyor sprocket, and hook the other adjusting chain and chain hook 8 onto the scraper crossbar below the scraper conveyor sprocket. Adjust the length of the two sets of return hook chain groups 5 and connect them securely with the connecting snap 9. At this time, keep the crossbar of the T-shaped bracket 1 as perpendicular as possible to the running direction of the scraper conveyor. Simultaneously tighten the positive and negative threads of the upper and lower sets of return hook chain groups 5. When initially turning the screw-pull mechanism 7 to pull back the scraper, ensure that the strokes of the positive screw 13 and the negative screw 15 are synchronized. If necessary, turn the screw-pull mechanism 7 with one hand while using the other hand to assist in controlling the connecting ring 12 at one end of the screw-pull mechanism 7. After the two sets of pull-back hook chains 5 are tightened simultaneously, if turning the screw-pull mechanism 7 with difficulty is required, the extended assisting sleeve 17 can be used to increase the force. When using the extended assisting sleeve 17 to increase the force, observe the chain hooks that hook the scraper crossbar to prevent them from coming off. After the scraper conveyor chain links arch up, use a pry bar to pry the chain links at the scraper conveyor sprocket to return them to their grooves. After the scraper chain links return to their positions, simultaneously loosen the upper and lower hook chains of the screw-pull mechanism 7 until the hook chains that hook the scraper can be completely released. Remove all maintenance tools and store them for future use. Finally, adjust the tension screw of the scraper conveyor sprocket to make the sprocket shaft perpendicular to the running direction of the chain plate and the chain tension appropriate. Finally, test run according to the start-up procedure. Figure 7 , Figure 8 The methods for handling chain slippage in medium-level scraper conveyors and high-head scraper conveyors are basically the same.

[0035] For chain breakage, if the chain breakage occurs at the head or tail of the machine, the handling method is basically the same as for chain drop: pull back the upper and lower scrapers to make the broken chain link arch up.

[0036] If the chain break occurs in the middle of the scraper conveyor body, such as Figure 9 As shown, one end of each of the two sets of pullback hook chain groups 5 is hooked onto the connecting ring hanging rod clamp 2 on the same side of the T-shaped bracket 1, which is equivalent to connecting them together. Then, the other ends of each of the two sets of pullback hook chain groups 5 are hooked onto the scrapers on both sides of the broken chain. The scrapers can be pulled back quickly, causing the broken chain section to arch. The broken chain parts can then be replaced and reconnected, thus completing the rapid handling of the broken chain fault.

[0037] The main innovations of this invention are: 1. The bottom of the T-shaped bracket is equipped with an arc-shaped shaft clip, which can be easily supported and clipped on the scraper conveyor sprocket shaft. The arrangement direction is perpendicular to the upright and crossbar of the T-shaped bracket, which can keep the bracket stable and prevent axial tilting. 2. Two sets of pull-back hook chains are symmetrically hung on the crossbar of the T-shaped bracket, which can maintain the balance and stability of the bracket when pulling back symmetrically; 3. Two sets of pull-back hook chain sets are symmetrically hung on the crossbar of the T-shaped bracket. The distance between them is greater than the diameter of the sprocket, which can ensure that the scraper sprocket will not be jammed when the chain is pulled back. 4. The tie plate is equipped with a screwing assist rod and an extended sleeve rod, which makes the pull-back powerful and effortless; 5. The length of the pull-back hook chain assembly is adjusted using a flexible connecting buckle, which is quick and convenient.

Claims

1. A method for handling chain drop faults in scraper conveyors, comprising a scraper conveyor chain drop fault handling device, characterized in that, The device includes a T-shaped bracket (1) and a pair of pull-back hook chain groups (5); the two ends of the crossbar of the T-shaped bracket (1) are symmetrically provided with multiple connecting ring hanging rod clips (2) for hanging the pull-back hook chain groups (5); the bottom of the column of the T-shaped bracket (1) is provided with an arc-shaped shaft clip (4); the axial direction of the arc-shaped shaft clip (4) is perpendicular to the plane formed by the T-shaped bracket (1) and the arc-shaped shaft clip (4) is connected to the column of the T-shaped bracket (1) through the outer arc surface; Each pull-back hook chain assembly (5) includes a cylindrical positive and negative threaded screw pull member (7) and an adjusting chain and chain hook (8). The positive and negative threaded screw pull member (7) has a positive threaded internal thread hole and a negative threaded internal thread hole at its front and rear ends, respectively. The positive threaded internal thread hole is equipped with a positive threaded screw (13), and the negative threaded internal thread hole is equipped with a negative threaded screw (15). One end of the positive threaded screw (13) and the negative threaded screw (15) is screwed into the corresponding internal thread hole, and the other end is equipped with a connecting ring (12). The positive and negative threaded screw tie member (7) has an assist rod (10) installed in its circumferential direction; the assist rod (10) is also equipped with an extended assist sleeve rod (17). It also includes a connecting snap fastener (9), which includes a ring-shaped part with a notch, both ends of the notch are threaded externally, and a locking part with an internal thread is provided at the notch. The locking part is screwed onto the external thread at the notch and can realize the connection and disconnection of the notch. The following is the procedure for handling chain drop faults in scraper conveyors: Place the bottom arc-shaped shaft clip (4) of the T-shaped bracket (1) onto the scraper conveyor sprocket shaft (6). Adjust the screws of the two sets of positive and negative threaded screw tie members (7) to their furthest positions. Then, symmetrically hang the connecting rings (12) on one side of the two sets of positive and negative threaded screw tie members (7) onto the connecting ring hanging rod clips (2) on both sides of the T-shaped bracket (1). The spacing between the connecting rings (12) should be greater than the diameter of the scraper conveyor sprocket. Hook one adjusting chain and chain hook (8) onto the scraper crossbar above the scraper conveyor sprocket, and hook the other adjusting chain and chain hook (8) onto the scraper crossbar below the scraper conveyor sprocket. Adjust the length of the two sets of pull-back hook chain groups (5) and securely connect them to the connecting rings (12) on the other side of the positive and negative threaded screw tie members (7) using the connecting snap (9). At this time, maintain the crossbar of the T-shaped bracket (1) in the direction of scraper conveyor operation. Vertically and synchronously rotate the assist rod (10) of the positive and negative threaded screw pull member (7) of the upper and lower sets of pull-back hook chain groups (5). When initially rotating the pull-back scraper of the positive and negative threaded screw pull member (7), ensure that the stroke of the positive threaded screw (13) and the negative threaded screw (15) are synchronized. After the two sets of pull-back hook chain groups (5) are tightened synchronously, if it is difficult to rotate the assist rod (10) of the positive and negative threaded screw pull member (7), an extended assist rod can be used. 17) Apply force and use the extended assist rod (17) to apply force while turning. Pay attention to the adjusting chain and chain hook (8) of the scraper crossbar to prevent disengagement. After the scraper machine chain link arches, use a pry bar to pry the chain link at the scraper machine sprocket to make it return to the groove. After the scraper machine chain link returns to the position, simultaneously loosen the upper and lower positive and negative thread screw pull components (7) until the adjusting chain and chain hook (8) of the scraper can be completely released. Remove all maintenance tools and put them in the warehouse for later use.

2. The method for handling chain drop faults in a scraper conveyor as described in claim 1, characterized in that, The positive and negative threaded screw tie member (7) includes a positive threaded hexagonal nut (14) and a negative threaded hexagonal nut (16) located at the front and rear ends respectively, and multiple wing plates (11) connecting the two hexagonal nuts; there are multiple assist rods (10) and they are vertically installed in the middle of the wing plates (11).

3. The method for handling chain drop faults in a scraper conveyor as described in claim 2, characterized in that, The T-shaped bracket (1) has symmetrical stiffening plates (3) at the connection between the crossbar and the column.

4. The method for handling chain drop faults in a scraper conveyor as described in claim 1, characterized in that, To ensure that the strokes of the positive threaded screw (13) and the negative threaded screw (15) are synchronized, one hand can turn the assist rod (10) of the positive and negative threaded screw pull member (7), and the other hand can assist in controlling the connecting ring (12) of the positive and negative threaded screw pull member (7) hanging on the connecting ring hanging rod clamp (2).

5. A method for handling chain drop faults in scraper conveyors as described in claim 1 or 4, characterized in that, For chain breakage, if the chain breakage is located at the head or tail of the scraper conveyor, the handling procedure is the same as for chain drop: pull back the upper and lower scrapers to arch the broken part of the chain, replace the broken part, and reconnect it.

6. The method for handling chain drop faults in a scraper conveyor as described in claim 5, characterized in that, For chain breakage, if the chain breakage is in the middle of the scraper conveyor body, hook one end of the two sets of pull-back hook chain groups (5) onto the connecting ring hanging rod clamp (2) on the same side of the T-shaped bracket (1), which is equivalent to connecting them together. Then hook the other end of the two sets of pull-back hook chain groups (5) onto the scrapers on both sides of the chain breakage point. The scrapers can be pulled back quickly. That is, by turning the screw pull member (7) of the positive and negative threads, the pull-back hook chain group (5) is driven to pull back the scrapers, so that the chain of the broken part of the chain arches up. Replace the broken chain parts, reconnect, and complete the quick handling of the chain breakage fault.

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