High temperature resistant buckle locking type coupling device

Abstract

The utility model relates to non ferrous metallurgical industry high temperature equipment connection technical field, concretely is a kind of high-temperature buckle locking coupling device, comprising: driving shaft, for hollow structure;Correction sleeve is composed of split buckle pipe and main body buckle pipe, and detachable connection by buckle structure;The main body buckle pipe is fixed with driving shaft welding;Floating locking group, symmetrically arranged on the both sides of main body buckle pipe, including locking block, locking bolt and locking nut;The locking block is embedded in the square groove of main body buckle pipe, and graphite rod is clamped by moving it by locking bolt drive;The split buckle pipe and the concave-convex buckle design of main body buckle pipe are used in the application, combined with the quick locking structure of square round lock ring, realize the manual disassembly of graphite rod without hoisting, compared with traditional flange coupling, greatly reduce the dependence on installation space and equipment, single-person operation can be realized in limited space, significantly shorten equipment maintenance time, improve production continuity.

Description

Technical Field

[0001] This utility model relates to the field of high-temperature equipment connection technology in the non-ferrous metallurgical industry, specifically a high-temperature resistant snap-lock coupling device. Background Technology

[0002] In the smelting, casting, and refining processes of the aluminum industry, the refining machine is a key piece of equipment used to remove impurities (such as hydrogen and oxides) from molten aluminum. Its core component is a graphite rotor (composed of a graphite impeller and a graphite rod), which disperses inert gases (such as argon) into the molten aluminum through rotation, achieving a purification effect. Because the graphite rotor is immersed in high-temperature molten aluminum (700-850℃) for a long time and is subjected to mechanical rotation (0-500rpm), chemical corrosion, and thermal shock, the high-temperature resistant snap-locking coupling device itself is made of high-quality alloy steel. Unlike other flange-type connection methods, it is connected to the graphite rotor at one end and integrally welded to the metal main shaft at the other end. The main shaft end no longer needs flange bolt connection, ensuring no weld failure, no deformation, and a firm and reliable connection. The reliability of its connection with the drive mechanism directly affects the service life and production efficiency of the equipment.

[0003] Currently, the connection between the refiner drive end and the graphite rotor mainly adopts the following four methods, all of which have certain limitations:

[0004] (1) Threaded coupling: The graphite rod is rigidly connected to the drive shaft through metal threads, and the torque is transmitted by thread engagement; however, the ambient temperature of molten aluminum is as high as 800℃ or more, and the metal threads are prone to jamming due to the difference in thermal expansion coefficients. Disassembly can easily cause the graphite rod to break, increasing maintenance costs. Secondly, the graphite rod is prone to bending when heated, and the threaded connection cannot compensate for radial deviation, resulting in eccentric wear and shortening service life; each replacement requires multiple rotation operations, which is dangerous and time-consuming in high-temperature environments.

[0005] (2) Plug-in quick-release coupling: It uses a graphite rotor with three corresponding spiral grooves machined on the end. The positioning sleeve connected to it has three evenly distributed inclined pins. When replacing the graphite rod, the graphite rod can be disassembled and removed by rotating it half a turn. This structure is easy to disassemble and install. The disadvantage is that the centering is insufficient and there is no effective radial compensation capability. When the graphite rod is deformed by heat or there is a deviation in installation, it is easy to cause eccentric wear, which will accelerate the damage of the graphite rod and the drive bearing. Secondly, the rotation direction must be correct. If the rotation direction is reversed due to operation error during operation, the graphite rod will automatically disengage and fall off, which will bring certain risks to safe use.

[0006] (3) Notched half-shaft bushing coupling: This coupling has a simple structure and is easy to install. It is a transmission structure in which a part is cut off at the front end of the graphite rod sleeve, and the other half is tightly fitted with the graphite rod. The upper half-shaft bushing and the lower half-shaft sleeve are clamped and fixed to achieve locking. Due to its tight fitting and locking requirements, the graphite rod and locking bushing sleeve require extremely high machining accuracy. After locking, the centering cannot be adjusted, which leads to insufficient centering during use and lack of effective radial compensation capability, affecting the service life of the graphite rod.

[0007] (4) Compression fitting flange coupling: Its centering adjustment is still somewhat inadequate. The adjustment process is slow and it cannot be adjusted to a certain size requirement ideally. When replacing the graphite rotor, since the compression fitting coupling is pre-installed and fixed with the graphite rotor, after the whole assembly, the flange on the compression fitting is connected to the flange on the drive shaft. Since the compression fitting flange is heavy, it is too cumbersome during installation. It is necessary to use an overhead crane or add other lifting tools for installation and connection. In addition, the installation space is limited, and the equipment can only be operated by a maximum of two people. In some narrow spaces or places that the overhead crane cannot reach, it is difficult for workers to lift, and the installation is labor-intensive and time-consuming, resulting in low time efficiency. Utility Model Content

[0008] This application provides a high-temperature resistant snap-locking coupling device, which can effectively solve the problems in the background art.

[0009] To achieve the above objectives, this application provides the following technical solution: a high-temperature resistant snap-locking coupling device, comprising:

[0010] The drive shaft has a hollow structure.

[0011] The correction sleeve consists of a split snap-fit ​​tube and a main snap-fit ​​tube, which are detachably connected by a snap-fit ​​structure; the main snap-fit ​​tube is welded and fixed to the drive shaft.

[0012] A floating locking assembly is symmetrically arranged on both sides of the main snap-fit ​​tube, including a locking block, a locking bolt, and a locking nut; the locking block is embedded in the square groove of the main snap-fit ​​tube, and is driven to move by the locking bolt to clamp the graphite rod;

[0013] The square-round locking ring consists of two semi-rings with an outer circle and an inner square, which lock the square mating surface of the graphite rod with locking screws and locking nuts;

[0014] The end face of the correction sleeve is provided with four threaded holes for connecting the square and round locking rings; the outer circle of the end is provided with six positioning screws for coaxiality correction.

[0015] Preferably, the locking block of the floating locking assembly is in contact with the locking positioning surface of the graphite rod end, and the locking positioning surface consists of two symmetrical planes; the locking bolt passes through the threaded hole of the main body buckle tube to push the locking block, and is prevented from being pulled back by the locking nut.

[0016] Preferably, the inner side of the semi-ring of the square-round locking ring has four planes that match the square contact surface of the graphite rod; each semi-ring has two locking screw holes, which are fixed by locking screws and locking nuts passing through each other.

[0017] Preferably, the snap-fit ​​structure of the split snap-fit ​​tube and the main snap-fit ​​tube is a concave-convex fit: the split snap-fit ​​tube is concave and the main snap-fit ​​tube is convex; the two are fixed together by four sleeve bolts and sleeve nuts.

[0018] Preferably, the graphite rod end is provided with a locking positioning surface, which consists of two symmetrical planes, for engaging with the locking block of the floating locking assembly.

[0019] Preferably, the drive shaft and the main snap-fit ​​tube of the correction sleeve are integrally welded together.

[0020] Preferably, the end face of the correction sleeve is provided with four evenly distributed threaded holes, which are aligned and connected with the screw holes of the square and round locking ring.

[0021] Preferably, the positioning screw is located on the outer circle of the end of the correction sleeve. The coaxiality of the graphite rod and the drive shaft is corrected by adjusting its screwing depth, and then locked by the positioning nut.

[0022] Preferably, the bolt holes of the split snap-fit ​​tube and the main snap-fit ​​tube are symmetrically distributed, and after assembly, the in-situ precision reset is achieved by the sleeve bolt and sleeve nut.

[0023] Compared with the prior art, the beneficial effects of this application are:

[0024] 1. This application adopts a concave-convex snap-fit ​​design of split snap-fit ​​tube and main snap-fit ​​tube, combined with a square and round locking ring quick-locking structure, to realize the graphite rod without hoisting and manual disassembly and assembly. Compared with traditional flange couplings, it greatly reduces the dependence on installation space and equipment, can be operated by a single person in a confined space, significantly shortens equipment maintenance time, and improves production continuity.

[0025] 2. The symmetrical radial fine-tuning function of the floating locking assembly effectively compensates for high-temperature thermal deformation; combined with the dynamic coaxiality correction of the positioning screws at the end of the correction sleeve, it completely solves the problems of eccentric wear and thermal expansion jamming in traditional couplings. This ensures the graphite impeller operates smoothly during high-temperature, high-speed rotation, improving the quality of aluminum liquid refining.

[0026] 3. The integral welding design of the drive shaft and the main body snap-fit ​​tube eliminates the risk of assembly loosening, and the adjustable preload mechanism of the floating locking assembly suppresses axial movement. It maintains long-term sealing and wear-free operation in high-temperature and corrosive environments, significantly reducing the probability of graphite rod breakage and extending the service life of core components. Attached Figure Description

[0027] Figure 1This is a schematic diagram of the structure of this application;

[0028] Figure 2 This is a schematic diagram of a square-round locking ring structure;

[0029] Figure 3 This is a schematic diagram of the structure after the square and round locking ring is tightened;

[0030] Figure 4 This is a schematic diagram of a split-tube structure;

[0031] Figure 5 This is a schematic diagram of the main sleeve structure;

[0032] Figure 6 This is a schematic diagram of the assembled correction sleeve structure;

[0033] Figure 7 This is a schematic diagram of the floating locking assembly structure;

[0034] Figure 8 A schematic diagram of the structure after the floating locking assembly is installed;

[0035] Figure 9 A schematic diagram of the structure after the graphite rotating rod, the correction sleeve, and the floating locking assembly are installed.

[0036] In the diagram: 1. Graphite impeller, 2. Graphite rod, 3. Square and round locking ring, 4. Floating locking assembly, 5. Split snap-fit ​​tube, 6. Main snap-fit ​​tube, 7. Drive shaft, 8. Locking screw, 9. Locking nut, 10. Sleeve bolt, 11. Sleeve nut, 12. Positioning screw, 13. Positioning nut, 14. Locking block, 15. Locking nut, 16. Locking bolt, 17. Graphite rotor, 18. Correction sleeve. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] In the description of this application, when a feature is referred to as "setting", "fixing", or "connecting" to another feature, it can be set, fixed, or connected to the other feature directly, or it can be set, fixed, or connected to the other feature indirectly.

[0039] like Figure 1-9 As shown, this application provides the following technical solutions:

[0040] like Figure 1High-temperature resistant snap-fit ​​quick coupling device is widely used in refining systems in the aluminum melting industry. Through centering adjustment and integrated connection, the adaptive floating locking group 4 can overcome the thermal expansion deformation of the graphite rotor 17 and other high-quality alloy components at 300 degrees Celsius. This ensures that the device has small runout after assembly, meets coaxiality requirements, and can continuously transmit power under high-speed operation, ensuring the production of flawless, high-quality, and stable aluminum melting products.

[0041] The graphite rotor 17 consists of a graphite impeller 1 and a graphite rod 2. The graphite rod 2 and the connecting end of the correction sleeve 18 are respectively machined into matching shapes and connecting dimensions so that the connection position of the graphite rod and the associated parts are correctly assembled.

[0042] Before installation, the graphite rod 2 and the square-round locking ring 3 are tightened and installed by using locking screws 8 and locking nuts 9 to align and lock the square plane machined on the surface of the graphite rod 2. The rod is then placed next to the equipment and awaits the next step of the operation.

[0043] The square-round locking ring 3 is composed of two semi-circular outer circles with slightly square inner circles. Locking is achieved by locking screw holes on both sides, which are fixed by locking screws 8 and locking nuts 9. Each semi-circle has two evenly distributed screw holes for connecting screws to the threaded holes on the end face of the correction sleeve 16.

[0044] Furthermore, using a wrench, the sleeve nut 10 of the correction sleeve 18 is opened, so that the split snap tube 5 is completely separated from the main snap tube 6, and the internal circular chamber is completely opened.

[0045] The correction sleeve 18 is composed of a split snap-fit ​​tube 5 and a main snap-fit ​​tube 6. During processing, it is processed according to the dimensions and precision requirements of the drawings and then cut by a special processing tool. The side with the concave platform is the split snap-fit ​​tube 5, and the side with the convex platform is the main snap-fit ​​tube 6. Two bolt holes are processed on both sides. During installation, it is bolted and fixed by sleeve bolts 10 and sleeve nuts 11. The four evenly distributed threaded holes processed on the end face of the assembled correction sleeve 18 are aligned with the four screw holes of the square and round locking ring 3. Six threaded correction holes are evenly distributed on the outer circle of the end.

[0046] Furthermore, a square sliding groove is machined at the position of the boss of the main body buckle tube 6, with the size matching that of the locking block 14, to facilitate free sliding within the groove. One of these grooves is machined on each side of the main body buckle tube 6, making them symmetrical.

[0047] During installation, using auxiliary tools, insert the graphite rod 2 into the circular cavity of the main body's locking tube 6 until it reaches the top of the cavity. Adjust the floating locking assembly 4 from both sides symmetrically to ensure a perfect fit between the locking block 14 and both sides of the graphite rod 2. Figure 9 As shown, the preload should not be too large at this time, and a certain locking torque should still be left to facilitate subsequent installation and positioning.

[0048] Following the previous installation step, use the sleeve bolt 10 and sleeve nut 11 to install and return the split snap-fit ​​tube 5 to its original position, so that they are combined to form a complete correction sleeve 18, as shown. Figure 6 As shown.

[0049] At this point, the graphite rod 2 is fully inserted into the correction sleeve 18. Then, align the four screw holes on the end face of the complete square and round locking ring 3 fixed to the graphite rod 2 with the four threaded holes on the end face of the correction sleeve 16. Use locking screws 8 of the same specification to pass through and fix them into the threaded holes on the end face of the correction sleeve 18. When fixing, pay attention to diagonally alternating the pre-locking.

[0050] Following the previous installation, manually rotate the alignment sleeve 18, then adjust the six positioning screws 12 at the end of the alignment sleeve 16. Use technical measurement to ensure that the dimensions between the graphite rod 2 and the alignment sleeve 18 meet the technical requirements. Finally, fix the screw with the locking nut 13 and adjust the clamping force of the square and round locking ring 3 to center the graphite rod on the center line of the drive shaft 7. Finally, adjust the locking bolts 16 on both sides of the alignment sleeve 18 and tighten them to the maximum force so that the floating locking assembly 4 completely locks the graphite rod 2. To loosen, rotate in the opposite direction.

[0051] Following the previous step, install the graphite impeller 1. The high-temperature resistant snap-fit ​​quick coupling device is now installed.

[0052] This utility model's high-temperature resistant buckle locking coupling device can be disassembled by operating in reverse, which is simple in structure, convenient in operation, safe in operation, and adjustable in precision. It significantly reduces time costs within the effective time, making it the best choice for refining equipment in the aluminum melting industry.

[0053] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high temperature resistant snap-lock coupling device, characterized in that, include: The drive shaft (7) has a hollow structure; The correction sleeve (18) consists of a split snap-fit ​​tube (5) and a main snap-fit ​​tube (6), which are detachably connected by a snap-fit ​​structure. The floating locking assembly (4) is symmetrically arranged on both sides of the main body snap tube (6), including a locking block (14), a locking bolt (16) and a locking nut (15); the locking block (14) is embedded in the square groove of the main body snap tube (6), and is driven to move by the locking bolt (16) to clamp the graphite rod (2). The square-round locking ring (3) is composed of two semi-rings with an outer circle and an inner square. The square mating surface of the graphite rod (2) is locked by the locking screw (8) and the locking nut (9). The end face of the correction sleeve (18) is provided with four threaded holes for connecting the square and round locking ring (3); the outer circle of the end is provided with six positioning screws (12) for coaxiality correction.

2. The high-temperature resistant snap-locking coupling device according to claim 1, characterized in that: The locking block (14) of the floating locking assembly (4) is in contact with the locking positioning surface of the graphite rod (2) end, and the locking positioning surface is two symmetrical planes; the locking bolt (16) passes through the threaded hole of the main body buckle tube (6) to push the locking block (14) and is prevented from being pulled out by the locking nut (15).

3. A high temperature resistant buckle and clasp coupling device according to claim 1, wherein: The inner side of the semi-ring of the square-round locking ring (3) is provided with four planes that match the square contact surface of the graphite rod (2); each semi-ring is provided with two locking screw holes, which are fixed by locking screws (8) and locking nuts (9).

4. The high temperature resistant buckle and clamp coupling device of claim 1, wherein: The snap-fit ​​structure of the split snap-fit ​​tube (5) and the main snap-fit ​​tube (6) is a concave-convex fit: the split snap-fit ​​tube (5) is concave and the main snap-fit ​​tube (6) is convex; the two are fixed by four sleeve bolts (10) and sleeve nuts (11).

5. The high-temperature resistant snap-locking coupling device according to claim 1, characterized in that: The graphite rod (2) has a locking and positioning surface at its end, which consists of two symmetrical planes, used to fit with the locking block (14) of the floating locking assembly (4).

6. A high temperature resistant buckle and clasp coupling device according to claim 1, wherein: The drive shaft (7) and the main snap-fit ​​tube (6) of the correction sleeve (18) are integrally welded together.

7. The high-temperature resistant snap-locking coupling device according to claim 1, characterized in that: The end face of the correction sleeve (18) is provided with four evenly distributed threaded holes, which are aligned and connected with the screw holes of the square and round locking ring (3).

8. A high temperature resistant buckle and clasp coupling device according to claim 1, wherein: The positioning screw (12) is located on the outer circle of the end of the correction sleeve (18). The coaxiality of the graphite rod (2) and the drive shaft (7) is corrected by adjusting its screwing depth, and then locked by the positioning nut (13).

9. A high temperature resistant buckle and clasp coupling device according to claim 4, wherein: The bolt holes of the split snap-fit ​​tube (5) and the main snap-fit ​​tube (6) are symmetrically distributed. After assembly, the in-situ precision reset is achieved by the sleeve bolt (10) and the sleeve nut (11).

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