Coupling structure of water-sealed slagging scraper

Abstract

The utility model relates to the technical field of slagging-off scraper machine, and disclose a water seal type slagging-off scraper machine's shaft coupling structure, include: main half coupling and vice half coupling, vice half coupling is connected with main half coupling rotation, and the end of main half coupling and vice half coupling all is equipped with the preloading hole for installation, locking structure sets up between main half coupling and vice half coupling for realizing axial locking, and locking structure includes lock block and breakage groove, lock block can be inserted with main half coupling and vice half coupling, and lock block opens one breakable breakage groove, and breakage groove is located at the joint of main half coupling and vice half coupling, and through setting up independent, modular lock block as overload shearing element, and will breakage groove accurate preset on lock block, when overload occurs, lock block is neat from breakage groove breakage, and there is no wreckage jam risk, and maintenance personnel only need to open the anti -drop shield, and can easily take out the broken lock block and change new by the magnetic attraction, do not need to disassemble the shaft coupling body, greatly shorten the downtime maintenance time.

Description

Technical Field

[0001] This utility model relates to the technical field of slag discharge scraper machines, and in particular to a coupling structure for a water-sealed slag discharge scraper machine. Background Technology

[0002] Water-sealed slag removal scrapers are widely used in boiler slag removal systems. Their working environment is harsh, and they are exposed to high temperature, high humidity, dust, and corrosive water vapor atmosphere for a long time. As a key component connecting the drive motor and the gearbox, the coupling not only needs to transmit torque, but also needs to have reliable overload protection function.

[0003] A search revealed an overload protection coupling for a scraper conveyor (publication number: CN216618320U), comprising a driving half-coupling, a driven half-coupling, and a connecting member. The driving half-coupling is mounted on the output shaft of the corresponding scraper conveyor motor, and the driven half-coupling is mounted on the input shaft of the corresponding scraper conveyor reducer. The connecting member is fixedly connected between the driving half-coupling and the driven half-coupling, so that the driven half-coupling rotates with the driving half-coupling. An overload protection pin is provided between the connecting member and the driven half-coupling.

[0004] It uses overload protection pins as shearing elements. However, in practical applications, especially under the aforementioned harsh working conditions, this type of pin structure has the following shortcomings: Inconvenient replacement: After the pin breaks, its remnant may get stuck in the hole and be difficult to remove, making replacement time-consuming and laborious; Inflexible torque adjustment: Changing the overload torque value usually requires replacing pins or coupling bodies of different specifications, while the number of protection pins is fixed, and it is difficult to adjust the overload range of a single pin in a timely manner, which is not convenient.

[0005] Therefore, we propose a coupling structure for a water-sealed slag discharge scraper. Utility Model Content

[0006] The present invention mainly solves the technical problems of the above-mentioned torque overload protection being non-adjustable and inconvenient to replace, and provides a coupling structure for a water-sealed slag discharge scraper.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a coupling structure for a water-sealed slag discharge scraper, comprising:

[0008] A main half-coupling and a secondary half-coupling, wherein the secondary half-coupling is rotatably connected to the main half-coupling, and both the main half-coupling and the secondary half-coupling are provided with pre-installed holes for installation at their ends;

[0009] A locking structure is provided between the main half-coupling and the auxiliary half-coupling for axial locking. The locking structure includes a locking block and a fracture groove. The locking block can be inserted into the main half-coupling and the auxiliary half-coupling. The locking block has a fracture groove that can be broken. The fracture groove is located at the joint of the main half-coupling and the auxiliary half-coupling.

[0010] In a preferred embodiment of this utility model, the joint between the main half-coupling and the auxiliary half-coupling is provided with several embedding grooves, and the locking block can be embedded in the embedding grooves, with a locking block provided in each embedding groove.

[0011] In a preferred embodiment of this utility model, the locking block is formed into a rectangular block, and the embedded groove is formed into a groove that fits the locking block with a clearance.

[0012] In a preferred embodiment of this utility model, the locking structure further includes permanent magnets, and two permanent magnets are provided at the bottom of the locking block. The permanent magnets can be magnetically attracted and fixed to the main half-coupling and the auxiliary half-coupling.

[0013] In a preferred embodiment of this utility model, the bottom of the lock block has two circular holes, and the permanent magnet is embedded in the corresponding circular holes.

[0014] In a preferred embodiment of this invention, the expansion groove is formed into a V-shaped groove, and the depth of the expansion groove is less than the thickness of the locking block.

[0015] As a preferred embodiment of this utility model, two combinable anti-detachment covers are provided on the outside of the joint between the main half-coupling and the auxiliary half-coupling. The two anti-detachment covers together form an annular protective cover, and the two anti-detachment covers press and limit the locking block.

[0016] This utility model provides a coupling structure for a water-sealed slag discharge scraper conveyor. It has the following beneficial effects:

[0017] 1. The coupling structure of this water-sealed slag discharge scraper conveyor uses independent, modular locking blocks as overload shearing elements, with expansion grooves precisely pre-set on the locking blocks. When an overload occurs, the locking block breaks cleanly from the expansion groove, eliminating the risk of debris jamming. Maintenance personnel only need to open the anti-detachment cover and easily remove the broken locking block and replace it with a new one using magnetic attraction, without disassembling the coupling body. This greatly shortens downtime for maintenance. By increasing or decreasing the number of locking blocks embedded in the groove, the overall overload protection torque value of the coupling can be adjusted linearly and flexibly. Users can quickly adjust the protection level according to actual working conditions (such as seasonal load changes and changes in material characteristics) without replacing the coupling or preparing various specifications of pins. It has excellent versatility and economy, and the torque threshold is adjustable, making it widely adaptable.

[0018] 2. The coupling structure of this water-sealed slag discharge scraper has a permanent magnet at the bottom of the locking block, which can automatically attract and fix it on the main and auxiliary half-couplings during installation, achieving initial positioning and pre-tightening. This facilitates the operator to install the protective cover later. After the protective cover is tightened, it can provide continuous axial clamping force to the locking block, ensuring that it does not move during normal operation and that torque transmission is stable.

[0019] 3. The coupling structure of this water-sealed slag discharge scraper features a unique anti-detachment protective cover design that completely covers the entire locking structure and the joint between the main and auxiliary half-couplings, forming a relatively sealed protective space. This effectively isolates the intrusion of external moisture and slag, prevents the locking block from rusting and sticking to the embedded groove, and ensures the long-term stability of the overload protection function. It is particularly suitable for the humid environment of the water-sealed slag discharge scraper. Attached Figure Description

[0020] Figure 1 This is a perspective view of the entire utility model;

[0021] Figure 2 This is a schematic diagram of the lock block after installation.

[0022] Figure 3 A schematic diagram showing the embedding grooves for the main half-coupling and the auxiliary half-coupling of this utility model;

[0023] Figure 4 This is one of the three-dimensional views of the lock block of this utility model;

[0024] Figure 5 This is the second perspective view of the locking block of this utility model.

[0025] Legend: 10. Main half-coupling; 11. Secondary half-coupling; 12. Embedded groove; 20. Locking block; 21. Expansion groove; 22. Permanent magnet; 30. Anti-detachment cover. Detailed Implementation

[0026] A coupling structure for a water-sealed slag discharge scraper, such as... Figure 1 and Figure 2 As shown, it includes:

[0027] The main half-coupling 10 and the auxiliary half-coupling 11 are rotatably connected to the main half-coupling 10. Both the main half-coupling 10 and the auxiliary half-coupling 11 are provided with pre-installed holes for installation at their ends.

[0028] like Figure 2 , Figure 3 and Figure 4As shown, a locking structure is provided between the main half-coupling 10 and the auxiliary half-coupling 11 for axial locking. The locking structure includes a locking block 20 and a fracture groove 21. The locking block 20 can be inserted into the main half-coupling 10 and the auxiliary half-coupling 11. The locking block 20 has a fracture groove 21, which is located at the joint of the main half-coupling 10 and the auxiliary half-coupling 11. The joint of the main half-coupling 10 and the auxiliary half-coupling 11 has several embedded grooves 12. The locking block 20 can be embedded in the embedded grooves 12. Each embedded groove 12 has a locking block 20. The locking block 20 forms a rectangular block. The embedded groove 12 forms a groove that fits the locking block 20 with a clearance. The fracture groove 21 forms a groove with a V-shaped cross section. The depth of the fracture groove 21 is less than the thickness of the locking block 20.

[0029] Locking block 20 should be made of a material with moderate strength and high brittleness, such as high carbon steel (e.g., T10A) or a specific grade of gray cast iron. Such materials can ensure that a clear brittle fracture occurs at the fracture groove under overload, rather than plastic deformation, thus ensuring the decisiveness of the protection action.

[0030] The V-shaped fracture groove 21 produces a significant stress concentration effect at its tip, ensuring that the fracture location is precisely controllable. The depth of the fracture groove is about 1 / 3 to 1 / 2 of the thickness of the locking block. If it is too shallow, it may cause the fracture torque to be too high or unstable, while if it is too deep, it may weaken the load-bearing capacity under normal working conditions.

[0031] Torque calibration: The nominal shear torque value of each locking block 20 should be determined experimentally. By selecting locking blocks of different materials or with different fracture groove depths, different single-block shear torque values ​​can be obtained. The overall overload torque threshold of the coupling = single-block shear torque × number of working locking blocks.

[0032] In this solution, several embedding grooves 12 are opened at the joint between the main half-coupling 10 and the auxiliary half-coupling 11. The overload torque can be limited by increasing or decreasing the number of locking blocks 20 installed. During installation, the locking blocks 20 are embedded in the corresponding embedding grooves 12. When the torque transmitted by the main half-coupling 10 and the auxiliary half-coupling 11 is greater than the torque that the locking blocks 20 can bear, the locking blocks 20 will break off from the fracture groove 21 to achieve overload protection. When replacing, it is only necessary to remove the broken locking block 20 and replace it with another new locking block 20, making maintenance simpler and more efficient.

[0033] like Figure 5As shown, the locking structure also includes permanent magnets 22. Two permanent magnets 22 are provided at the bottom of the locking block 20. The permanent magnets 22 can be magnetically fixed with the main half-coupling 10 and the auxiliary half-coupling 11. Two circular holes are opened at the bottom of the locking block 20, and the permanent magnets 22 are embedded in the corresponding circular holes. The permanent magnets 22 should be of the type with stable magnetic properties at the operating temperature of the equipment (e.g., not exceeding 80-120℃), such as neodymium iron boron (N35-N40) nickel-plated or aluminum nickel cobalt magnets, and their corrosion resistance should be considered. The circular holes at the bottom of the locking block 20 should be blind holes or stepped holes. The permanent magnets 22 are pressed in with an interference fit or fixed with adhesive. Their mounting surface should be slightly lower than the bottom surface of the locking block to ensure that the metal part of the locking block can contact the half-coupling body, and not just magnetically attract it.

[0034] In this scheme, by setting permanent magnets 22, the main half-coupling 10 and the auxiliary half-coupling 11 are respectively attracted by two permanent magnets 22, which facilitates the initial installation and limiting of the locking block 20.

[0035] like Figure 1 As shown, two combinable anti-detachment covers 30 are provided on the outside of the joint between the main half-coupling 10 and the auxiliary half-coupling 11. The two anti-detachment covers 30 together form an annular protective cover. The two anti-detachment covers 30 press and limit the locking block 20. In this solution, the two locking blocks 20 are locked with bolts, and the annular protective cover formed by the two anti-detachment covers 30 covers the joint between the main half-coupling 10 and the auxiliary half-coupling 11. At the same time, the anti-detachment covers 30 can provide pressure to the locking block 20 to prevent the locking block 20 from falling out of the embedded groove 12, thus ensuring the stability of torque transmission.

[0036] The mating surfaces of the two anti-detachment covers 30 should be equipped with sealing grooves and O-rings or rubber gaskets. The mating points between the covers and the outer circles of the main and auxiliary half-couplings 10 and 11 can also be equipped with lip seals or gap labyrinth seals to enhance the overall dustproof and waterproof effect.

[0037] The inner diameter of the protective cover should be slightly smaller than the outer diameter of the main and auxiliary half-coupling flange. After the bolts are tightened, the inner ring of the protective cover will exert a uniform pressing force on the top of all locking blocks 20 towards the bottom of the embedded groove. This is the key to preventing the locking blocks from fretting wear and loosening under alternating torque.

[0038] The working principle of this utility model is as follows: Normal torque transmission: The drive motor inputs torque through the main half-coupling 10, and the torque is transmitted through multiple locking blocks 20 that are jointly supported at the joint of the main half-coupling 10 and the auxiliary half-coupling 11. The locking blocks 20 are subjected to shearing force, and because their strength is higher than the normal working torque, they remain intact, reliably transmitting the torque to the auxiliary half-coupling 11, thereby driving the reducer and scraper conveyor. The anti-detachment cover 30 provides axial constraint for the locking blocks 20, preventing them from detaching.

[0039] Overload protection and disconnection: When the scraper conveyor experiences an abnormal increase in load torque due to jamming or other reasons, exceeding the total design shear strength of all working locking blocks 20, the shear stress applied to the locking block 20 is concentrated at its weakest preset part - the fracture groove 21. The locking block 20 undergoes a neat brittle fracture at the fracture groove 21, and the torque transmission path between the main and auxiliary half-couplings 10 and 11 is instantly cut off, causing the motor to idle, thereby protecting the entire drive system and mechanical equipment.

[0040] Quick reset and replacement: After troubleshooting, loosen and remove the two anti-detachment covers 30. The two halves of the broken locking block 20 may still be attracted to the original position by the permanent magnet 22, which can be easily removed. After cleaning the embedded groove 12, put the new locking block 20 in, and its permanent magnet 22 will automatically attract and position it. Reinstall and tighten the anti-detachment cover 30 to complete the replacement and restore the equipment to normal operation.

[0041] All exposed components, such as the main half-coupling 10, the auxiliary half-coupling 11, and the anti-detachment cover 30, shall have their surfaces treated with anti-corrosion measures, such as hot-dip galvanizing, spraying with epoxy anti-corrosion paint, or using stainless steel.

[0042] This coupling structure is particularly suitable for water-sealed slag discharge scrapers. Its sealing design can effectively cope with humid and splashing conditions, extending the maintenance cycle.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A coupling structure for a water-sealed slag discharge scraper conveyor, characterized in that, include: The main half-coupling (10) and the auxiliary half-coupling (11) are rotatably connected to the main half-coupling (10). The ends of the main half-coupling (10) and the auxiliary half-coupling (11) are provided with pre-installed holes for installation. A locking structure is provided between the main half-coupling (10) and the auxiliary half-coupling (11) for axial locking. The locking structure includes a locking block (20) and a fracture groove (21). The locking block (20) can be inserted into the main half-coupling (10) and the auxiliary half-coupling (11). The locking block (20) has a fracture groove (21) that can be broken. The fracture groove (21) is located at the joint between the main half-coupling (10) and the auxiliary half-coupling (11).

2. The coupling structure of the water-sealed slag discharge scraper according to claim 1, characterized in that: The joint between the main half-coupling (10) and the auxiliary half-coupling (11) is provided with several embedded grooves (12), and the locking block (20) can be embedded in the embedded groove (12). Each embedded groove (12) is provided with a locking block (20).

3. The coupling structure of the water-sealed slag discharge scraper according to claim 2, characterized in that: The locking block (20) forms a rectangular block, and the embedded groove (12) forms a groove that fits the locking block (20) with a clearance.

4. The coupling structure of the water-sealed slag discharge scraper according to claim 1, characterized in that: The locking structure also includes permanent magnets (22). Two permanent magnets (22) are provided at the bottom of the locking block (20). The permanent magnets (22) can be magnetically fixed with the main half-coupling (10) and the auxiliary half-coupling (11).

5. The coupling structure of the water-sealed slag discharge scraper according to claim 4, characterized in that: The bottom of the lock block (20) has two round holes, and the permanent magnet (22) is embedded in the corresponding round holes.

6. The coupling structure of the water-sealed slag discharge scraper according to claim 1, characterized in that: The expansion groove (21) forms a V-shaped groove, and the depth of the expansion groove (21) is less than the thickness of the locking block (20).

7. The coupling structure of the water-sealed slag discharge scraper according to claim 1, characterized in that: The joint between the main half-coupling (10) and the auxiliary half-coupling (11) is provided with two combinable anti-detachment covers (30). The two anti-detachment covers (30) together form an annular protective cover, and the two anti-detachment covers (30) press and limit the locking block (20).

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