Drum-type screen pinion replacement device

Abstract

The present application belongs to the technical field of gear online replacement, and particularly relates to a drum filter screen pinion online replacement device. The device comprises a shell and a base arranged on the ground surface, a climbing frame fixedly connected with the shell and the base, a protection disc arranged on a loading disc, a motor arranged on a support shaft, the loading disc slidingly installed in the shell and the base, a bearing inner ring fixedly connected with a fixed block, one end of a screw rod fixedly connected with the support shaft, the other end of the screw rod slidingly connected with a gear disc, one end of the fixed block slidingly installed on a mounting guide rail, the other end of the fixed block cooperatively connected with the screw rod, one end of the mounting guide rail fixedly installed on the gear disc, the other end of the mounting guide rail freely suspended, the loading disc provided with an embedded groove and a positioning installation groove, the support shaft arranged on the loading disc, and a ball for assisting installation, which is a fixed structure of the free end of the mounting guide rail. The present application has the beneficial effect that the screw rod in the present application cooperatively removes and installs the gear, provides a relatively stable traveling process, and ensures the feasibility of removal and installation.

Description

Technical Field

[0001] This invention belongs to the field of online gear replacement technology, specifically relating to an online replacement device for a drum-shaped filter screen pinion. Background Technology

[0002] The drum-shaped rotary filter is a core piece of equipment in seawater filtration systems for nuclear power plants and water filtration systems in other industries. It mainly consists of a drive unit, main shaft, drum-shaped frame, sealing system, lubrication and flushing devices, and automatic control system. The drive gears on the drum-shaped rotary filter are open gear drives. Due to the high sediment content in some nuclear power plant operating conditions, sand particles may remain on the contact surfaces of the gear teeth during meshing. As the gears mesh, the tooth surfaces experience severe wear, making it impossible to meet the operating cycle requirements of the nuclear power plant.

[0003] The gears in the transmission device are prone to wear due to their material and usage requirements, necessitating regular replacement. Currently, replacing the drive gear typically requires stopping the rotating drum filter for several hours or more. Furthermore, because the gears are very heavy, replacing them using a combination of machinery and manual labor is inefficient, making the process time-consuming and labor-intensive.

[0004] Therefore, it is necessary to improve the existing gear replacement method and urgently develop an online, quick replacement device for drum-type filter gears. Summary of the Invention

[0005] The purpose of this invention is to provide an online replacement device for the small gear of a drum-type filter screen, which is applicable to the online quick replacement and installation of the drum-type rotary filter screen drive device in nuclear power plants during operation, and solves the problem of the slow replacement and installation process of the existing drum-type rotary filter screen drive gear.

[0006] The technical solution of the present invention is as follows: An online replacement device for a drum-shaped filter screen pinion includes a housing and base, a protective disc, a motor, a loading disc, a climbing frame, a bearing, a screw rod, a fixing block, a mounting guide rail, a support shaft, and auxiliary mounting balls; the housing and base are located on the ground surface, the climbing frame is fixedly connected to the housing and base, the protective disc is located on the loading disc, the motor is located on the support shaft and provides driving force for the rotation of the screw rod, the loading disc is slidably installed inside the housing and base and can rotate around an axis inside the housing and base, the inner ring of the bearing is fixedly connected to the fixing block, one end of the screw rod is fixedly connected to the support shaft and the other end is slidably connected to the gear disc, one end of the fixing block is slidably installed on the mounting guide rail and the other end is connected to the screw rod, one end of the mounting guide rail is fixedly installed on the gear disc and the other end is freely suspended, the loading disc has an embedding groove and a positioning mounting groove, the support shaft is located on the loading disc, and the auxiliary mounting balls are a fixing structure for the free end of the mounting guide rail.

[0007] The protective disc is welded and fixed onto the loading disc.

[0008] During the removal and replacement operation, the axis of the protective plate is collinear with the axis of the mounting rail.

[0009] The axis of the loading disk is collinear with the axis of the gear disk.

[0010] One end of the fixing block is slidably mounted on the mounting guide rail, and the other end is connected to the helical rod by a thread.

[0011] The support shaft is mounted on the loading disk, and its axis is collinear with the axis of the loading disk.

[0012] The outer shell and base are fixed or embedded in the ground surface.

[0013] The beneficial effects of this invention are as follows: the screw rod in this invention, used for gear removal and installation, provides a relatively stable travel process, ensuring the feasibility of removal and installation; this device allows gear replacement during the operation of the drive unit; this device distributes the load through the rigid connection of the screw rod, sharing a portion of the load borne by the drive gear and motor structure; the installation guide rail of this device uses end-mounted ball bearings, improving the installation error range during gear installation; this device is equipped with a protective disc to prevent the drive gear from falling off after removal or during installation; this device adopts a positioning mounting slot structure, facilitating gear replacement without the need for deliberate alignment, improving convenience; this device uses physical mechanical transmission, has a compact structure, and is not easily deformed; this device is equipped with a climbing frame device, facilitating operator operation. Attached Figure Description

[0014] Figure 1 A front view of an online replacement device for a drum-shaped filter screen pinion provided by the present invention;

[0015] Figure 2 A complete view (rear) of an online replacement device for a drum-shaped filter screen pinion provided by the present invention.

[0016] In the diagram: 1. Outer shell and base; 2. Protective disc; 3. Motor; 4. Loading disc; 5. Climbing frame; 6. Bearing; 7. Helical rod; 8. Fixing block; 9. Mounting guide rail; 10. Fixing block embedding groove; 11. Support shaft; 12. Positioning mounting groove; 13. Auxiliary mounting ball bearing. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] To address the technical problem of low efficiency in replacing drive gears for drum-type rotary filters in nuclear power plants, this invention provides an online replacement device for the small gear of a drum-type filter. This device first works in conjunction with a gear drive unit, achieving the effects of not affecting the operation of the drive gear, a fast and convenient process, and a highly efficient, stable, and risk-free structure. This addresses the related problems encountered during the replacement and installation of the drive gear for drum-type filters.

[0019] The main body of this invention employs a mechanical system that utilizes the rotation of a gear disk in a control transmission device to drive the rotation of the rear installation chamber, thereby achieving precise control over the gear installation position.

[0020] To enable gear removal during operation, for the drive gear, it is essential to ensure that the other working drive gear remains operational during replacement. Therefore, two independent fixing and disassembly mechanisms are used for the two interchangeable drive gears. Simultaneously, to ensure precise positioning and ease of installation, a positioning mounting slot is used to precisely position the drive gear horizontally. This allows the positioning mounting slot to move with the rotation of the gear disc in the life extension device. Therefore, the positioning mounting slot is designed on a disc that is rigidly connected to the gear disc, ensuring that the positioning mounting slot rotates with it.

[0021] Because drum filters are subjected to extremely high loads, hollow structures are often used for related unloaded components to reduce their weight and thus minimize the load on load-bearing parts. To ensure that the replaced gear can reach the designated position, a screw mechanism is used to drive the fixed block, which is electrically driven to push the drive gear to the designated position. A bearing is used to connect the drive gear and the fixed block to prevent power transmission to the fixed block and related mechanisms behind it. At the same time, an external ladder and an internal opening are used to ensure the stability of the structure while ensuring the convenience of operation for the operator and providing a relevant storage platform.

[0022] The features of this invention are as follows:

[0023] This device uses a screw rod to remove and install gears, allowing gear replacement to be performed while the drive unit is running.

[0024] The device is designed with a rigid screw connection to distribute the load, thus sharing a portion of the load borne by the drive gear and motor structure.

[0025] The device uses ball bearings at the end of the mounting rail, which improves the installation error range when installing gears.

[0026] This device is designed with a protective disc to prevent the drive gear from falling off during removal or installation.

[0027] The positioning mounting slot designed in this device facilitates gear replacement without requiring precise alignment, thus improving convenience.

[0028] like Figure 1 and 2 As shown, an online replacement device for a drum-shaped filter screen pinion includes a housing and base 1, a protective disc 2, a motor 3, a loading disc 4, a climbing frame 5, a bearing 6, a screw rod 7, a fixing block 8, a mounting rail 9, a fixing block embedding groove 10, a support shaft 11, a positioning mounting groove 12, and auxiliary mounting balls 13. The housing and base 1 are fixed or embedded in the ground surface. The loading disc 4 is mounted on the housing and base 1, which is fixed to the ground. The climbing frame 5 is fixedly connected to the housing and base 1. The protective disc 2 is welded and fixed to the loading disc 4. During removal and replacement operations, the axis of the protective disc 2 is collinear with the axis of the mounting rail 9. The motor 3 is fixedly mounted on the support shaft 11 and provides driving force for the rotation of the screw rod 7. The loading disc 4 is slidably mounted inside the housing and base 1 and can rotate around its axis inside the housing and base 1. The axis of the loading disc 4 is collinear with the axis of the gear disc. The inner ring of bearing 6 is fixedly connected to the fixing block 8, and the outer ring is movably connected to the surface of the drive gear using a snap-fit ​​connection. One end of the helical rod 7 is fixedly connected to the support shaft 11, and the other end is slidably connected to the gear disk. One end of the fixing block 8 is slidably mounted on the mounting guide rail 9, and the other end is connected to the helical rod 7 via a thread. One end of the mounting guide rail 9 is fixedly mounted on the gear disk, and the other end is freely suspended. The fixing block embedding groove 10 is a fixing structure on the loading disc 4. When the fixing block 8 is detached from the mounting guide rail 9, it can provide limiting support for the fixing block 8, ensuring the stability of the fixing block 8 after detachment from the mounting guide rail 9. The support shaft 11 is fixedly mounted on the loading disc 4, and its axis is collinear with the axis of the loading disc 4. The positioning mounting groove 12 is a fixing structure on the loading disc 4. During the disassembly and installation of the gear, it can provide support for the gear and assist in the gear's alignment with the shaft. The auxiliary mounting ball 13 is a fixing structure at the free end of the mounting guide rail. Its rounded corner design facilitates the installation of the gear onto the mounting guide rail 9.

[0029] The working principle of this invention is as follows:

[0030] The screw rod 7 is used in conjunction with the fixed block 8, such as... Figure 1 As shown, the inner surface thread of the fixing block 8 is engaged with the outer surface thread of the screw rod 7. The fixing block 8 is also engaged with the mounting guide rail 9. The screw rod 7 is rotated by the motor 3. Due to the screw engagement, the fixing block 8 can move horizontally along the mounting guide rail 9.

[0031] The fixing block 8 is also rigidly connected to the inner ring of the bearing 6, and the outer ring of the bearing 6 is connected to the surface of the drive gear by a snap-fit ​​connection. This ensures that the drive gear will not transmit rotational force to the fixing block 8 and the related structures behind it after reaching the designated position. The snap-fit ​​connection also ensures that it is easy to remove and install.

[0032] The fixing block embedding groove 10 ensures that the fixing block 8 and the gear can maintain horizontal movement after being separated from the mounting guide rail 9. The auxiliary mounting ball 13 at the end of the mounting guide rail 9 ensures that when the gear is installed, there will be no phenomenon where the mounting guide rail 9 cannot cooperate with the fixing block 8 and the gear due to installation errors.

[0033] The outer casing and base 1 are fixed or embedded in the ground surface to ensure structural stability and also bear part of the load. The protective disc 2 prevents the drive gear from falling off after removal or during installation, and also serves a positioning function. The disc and gear are coaxial, facilitating installation. The loading disc 4 is rigidly connected to the gear disc by a helical rod 7 and rotates with the gear disc. An external climbing frame 5 is also mounted to facilitate related operations by operators. The support shaft 11 pneumatically loads the motor and bears the load. The positioning mounting groove 12 provides a working surface for the disassembly and installation of the gear.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions for some or all of the technical features, do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An online replacement device for a drum-shaped filter screen pinion, characterized in that: The system includes a housing and base, a protective disc, a motor, a loading disc, a climbing frame, bearings, a screw rod, a fixing block, mounting rails, a support shaft, and auxiliary mounting balls. The housing and base are located on the ground surface. The climbing frame is fixedly connected to the housing and base. The protective disc is mounted on the loading disc. The motor is mounted on the support shaft and provides driving force for the rotation of the screw rod. The loading disc is slidably installed inside the housing and base, allowing it to rotate around an axis within the housing and base. The inner ring of the bearing is fixedly connected to the fixing block, while the outer ring is movably connected to the surface of the drive gear using a snap-fit ​​mechanism. One end of the screw rod is fixed to the support shaft. The connection is made at one end and slidably connected to the gear disk at the other end. One end of the fixing block is slidably mounted on the mounting guide rail, and the other end is connected to the helical rod. One end of the mounting guide rail is fixedly mounted on the gear disk, while the other end is freely suspended. The loading disc has an embedding groove and a positioning mounting groove. The support shaft is located on the loading disc. The auxiliary mounting ball is the fixing structure of the free end of the mounting guide rail. For the drive gear, it is ensured that during the replacement process, the other working drive gear remains in operation. Two independent fixing and disassembly mechanisms are used for the two drive gears that can be replaced.

2. The online replacement device for a drum-shaped filter screen pinion as described in claim 1, characterized in that: The protective disc is welded and fixed onto the loading disc.

3. The online replacement device for a drum-shaped filter screen pinion as described in claim 1, characterized in that: During the removal and replacement operation, the axis of the protective plate is collinear with the axis of the mounting rail.

4. The online replacement device for a drum-shaped filter screen pinion as described in claim 1, characterized in that: The axis of the loading disk is collinear with the axis of the gear disk.

5. The online replacement device for a drum-shaped filter screen pinion as described in claim 1, characterized in that: One end of the fixing block is slidably mounted on the mounting guide rail, and the other end is connected to the helical rod by a thread.

6. The online replacement device for a drum-shaped filter screen pinion as described in claim 1, characterized in that: The support shaft is mounted on the loading disk, and its axis is collinear with the axis of the loading disk.

7. The online replacement device for a drum-shaped filter screen pinion as described in claim 1, characterized in that: The outer shell and base are fixed or embedded in the ground surface.

Images