Special tool for adjusting screw of permanent magnet generator base of power plant

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By designing a special tool with a wrench body, ratchet socket head, and positioning guide rod, the problem of low installation efficiency caused by expensive tools and iron plate adjustments is solved, enabling efficient and low-cost assembly and disassembly of permanent magnet generator base screws, suitable for maintenance in power plants with limited space.

CN222328028UActive Publication Date: 2025-01-10HUAINAN TIANJIAAN POWER GENERATION PLANT ANHUI ELECTRIC POWER CO LTD

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Patent Information

Application Number: CN202420237575.4
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-01-31
Publication Date: 2025-01-10
Estimated Expiration: 2034-01-31

AI Technical Summary

Technical Problem

Existing tools specifically designed for disassembling and assembling the screws of the permanent magnet generator base are expensive. Repairers usually use iron plates to wedge into the slots for adjustment, but the material strength is insufficient, which affects the installation progress and may cause the shims to slip, resulting in low installation efficiency.

Method used

A special tool was designed, comprising a wrench body, a ratchet socket head, a positioning guide rod, and a locking block. The wrench body is cylindrical, with the ratchet socket head and the positioning guide rod fixed to both ends of the wrench. The locking block is used to adjust the screw slot. The positioning guide rod is inserted into the washer hole at the bottom of the screw to prevent the washer from moving. The wrench block increases torque to facilitate tightening.

Benefits of technology

This invention provides a compact and portable tool that improves installation efficiency, reduces manpower burden, is suitable for space-constrained disassembly and assembly environments, prevents gasket misalignment, and reduces maintenance costs.

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Abstract

The utility model provides a power plant permanent magnet generator base adjusting screw special tool which comprises a wrench body, a ratchet socket head fixedly connected to the upper end face of the wrench body, a positioning guide rod fixedly connected to the lower end face of the wrench body, two sets of clamping blocks symmetrically arranged on the side face of the positioning guide rod and fixedly connected with the lower end face of the wrench body. Two groups of wrenching blocks are connected to the side surface of the wrench main body in an embedded manner, the two groups of wrenching blocks are symmetrically distributed, and the plate block is rotationally connected with the wrench main body. The ratchet socket head and the positioning guide rod are arranged and fixedly connected to the two ends of the wrench body respectively, the wrench body is of a cylindrical structure, the clamping block is fixedly connected to the wrench body and acts on the linear clamping groove of the adjusting screw, the adjusting screw can be rotated conveniently, and the wrench body is small in size and convenient to use. And the whole device adopts an integrated structure, and is compact in structure, light in weight, convenient to carry, small in use space and suitable for being used in occasions with limited space.

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Description

Technical Field

[0001] The utility model relates to the technical field of electromechanical maintenance tools, in particular to a special tool for adjusting screws of a permanent magnet machine base in a power plant. Background Art

[0002] The brushless generator is actually composed of two generators, one as an exciter and the other as the main generator, and a rotating rectifier composed of a diode (or thyristor). Usually, synchronous generators use rotating poles, and AC exciters use rotating armatures. The rotor and rotating rectifier of the AC exciter are on the same axis as the generator rotor, so that the medium-frequency AC power emitted by the AC exciter is rectified into DC power by the coaxial rotating rectifier and then sent to the coaxial generator excitation winding, thus replacing the carbon brushes and slip rings.

[0003] When the brushless generator is being repaired, the permanent magnet machine needs to be removed to facilitate maintenance. During the disassembly and assembly process, due to the limitation of installation space, it is not convenient to use common screwdrivers on the market when turning the adjustment screws. Special disassembly and assembly tools for the permanent magnet machine base screws are expensive, which will increase the maintenance cost. The maintenance personnel usually use iron sheets to insert into the slots for adjustment. Due to the insufficient strength of the iron sheet material, it will affect the installation progress and cause the gasket at the bottom of the adjustment screw to slip, shift and deviate, resulting in low installation efficiency. Therefore, the present application provides a special tool for adjusting the base screws of the permanent magnet machine of a power plant to meet the needs. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a special tool for adjusting the base screws of a permanent magnet machine in a power plant, so as to solve the problem that the tools currently used for disassembling and assembling the base screws of the permanent magnet machine are expensive, which will increase the maintenance cost. The maintainer usually uses an iron sheet to insert the iron sheet into the slot for adjustment. The insufficient strength of the iron sheet material will affect the installation progress and cause the gasket at the bottom of the adjustment screw to slip, shift and deviate, resulting in low installation efficiency.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A special tool for adjusting screws of a permanent magnet machine base in a power plant comprises a wrench body, the upper end face of the wrench body is fixedly connected to a ratchet socket head, the lower end face of the wrench body is fixedly connected to a positioning guide rod, two groups of clamping blocks are symmetrically arranged on the side of the positioning guide rod, the clamping blocks are fixedly connected to the lower end face of the wrench body, two groups of lever blocks are embedded and connected to the side of the wrench body, the two groups of lever blocks are symmetrically distributed, and the plates are rotatably connected to the wrench body.

[0007] Optionally, the wrench body is a cylindrical structure with a diameter of 50 mm and a height of 45 mm, and the wrench body is made of metal material.

[0008] Optionally, the clamping block is 5.2 mm wide and 6 mm high, and the clamping block is integrally connected to the wrench body.

[0009] Optionally, the outer contour of the ratchet socket head is a regular hexagonal structure, and a ratchet slot is provided on the surface of the ratchet socket head.

[0010] Optionally, the diameter of the positioning guide rod is 22 mm, the positioning guide rod is coaxially arranged with the wrench body, and the positioning guide rod is integrally connected with the wrench body.

[0011] Optionally, a positioning cone head is provided at the bottom of the positioning guide rod, and the positioning cone head is integrally connected to the positioning guide rod.

[0012] Optionally, two groups of movable slots are symmetrically provided on the side of the wrench body, and the wrench block is embedded in the slots and is rotatably connected to the wrench body.

[0013] Optionally, the pull block is of a triangular structure, a groove is provided at the acute-angle end of the pull block, and the acute-angle end of the pull block is rotatably connected to the inner wall of the movable slot through a connecting shaft.

[0014] Optionally, a torsion spring is embedded in the groove of the pull block, and the torsion spring is movably sleeved on the connecting shaft, and two ends of the torsion spring are respectively in contact with the movable slot and the pull block.

[0015] Optionally, the pull block can be completely embedded in the movable slot.

[0016] Compared with the prior art, the utility model has at least the following beneficial effects:

[0017] In the above scheme, a ratchet socket head and a positioning guide rod are provided, and the ratchet socket head and the positioning guide rod are respectively fixedly connected to the two ends of the wrench body. The wrench body is a cylindrical structure, and a clamping block is fixedly connected to the wrench body. The clamping block acts on the slot of the adjusting screw to facilitate the rotation of the adjusting screw. The wrench body is small in size and adopts an integrated structure as a whole. The structure is compact, light in weight, easy to carry, and has a small usage space. It is suitable for use in occasions with limited space.

[0018] The function of the positioning guide rod is to be inserted into the center hole of the adjusting screw and the bottom gasket to prevent the bottom gasket from moving off-center and requiring rework when tightening the adjusting nut. The positioning guide rod effectively improves the installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments of the present invention and, together with the description, further serve to explain the principles of the present invention and enable those skilled in the relevant art to make and use the present invention.

[0020] Figure 1 This is a three-dimensional structural diagram of a special tool for adjusting screws on the base of a permanent magnet machine in a power plant;

[0021] Figure 2 This is a schematic diagram of the main structure of a special tool wrench for adjusting the screws of the permanent magnet machine base in a power plant;

[0022] Figure 3 This is a schematic diagram of the structure of the special tool wrench for adjusting the screws of the permanent magnet machine base in a power plant.

[0023] [reference numerals]

[0024] 1. Wrench body; 11. Movable card slot;

[0025] 2. Positioning guide rod; 21. Positioning cone head;

[0026] 3. Card block;

[0027] 4. ratchet socket head; 41. ratchet slot;

[0028] 5. Pull block; 51. Connecting shaft; 52. Torsion spring.

[0029] As shown in the figure, in order to clearly implement the structure of the embodiment of the utility model, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the utility model to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0030] The following is a detailed description of a special tool for adjusting screws of a permanent magnet machine base in a power plant provided by the utility model in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the utility model.

[0031] It should be noted that the references to "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0032] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0033] It is to be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers, and “on” or “above” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers.

[0034] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0035] like Figure 1 and Figure 2 As shown, the embodiment of the utility model provides a special tool for adjusting the screws of the permanent magnet machine base of a power plant, including a wrench body 1, a ratchet socket head 4 is fixedly connected to the upper end face of the wrench body 1, a positioning guide rod 2 is fixedly connected to the lower end face of the wrench body 1, two groups of clamping blocks 3 are symmetrically arranged on the side of the positioning guide rod 2, and the clamping blocks 3 are fixedly connected to the lower end face of the wrench body 1, and two groups of wrench blocks 5 are embedded and connected to the side of the wrench body 1, and the two groups of wrench blocks 5 are symmetrically distributed, and the plates are rotatably connected to the wrench body 1. The body 1 is a cylindrical structure, the diameter of the wrench body 1 is 50mm and the height is 45mm. The wrench body 1 is made of metal material. The clamping block 3 is 5.2mm wide and 6mm high. The clamping block 3 is integrally connected to the wrench body 1. The outer contour of the ratchet socket head 4 is a regular hexagonal structure. A ratchet slot 41 is provided on the surface of the ratchet socket head 4. The outer contour of the ratchet socket head 4 is compatible with the groove structure of the hexagonal nut on the permanent magnet machine base. The ratchet slot 41 can be used to turn a screw compatible with it.

[0036] like Figure 2As shown, the diameter of the positioning guide rod 2 is 22 mm, the positioning guide rod 2 is coaxially arranged with the wrench body 1, the positioning guide rod 2 is integrally connected with the wrench body 1, the length of the positioning guide rod 2 is adapted to the height of the adjusting screw of the adapter block 3, so that after the block 3 is embedded in the slot of the adjusting screw, the bottom of the positioning guide rod 2 can contact the gasket at the bottom of the adjusting screw, which is convenient for helping to position the gasket and avoid rework caused by the gasket slipping and misalignment. A positioning cone head 21 is provided at the bottom of the positioning guide rod 2, and the positioning cone head 21 is integrally connected with the positioning guide rod 2. The positioning cone head 21 can contact the gasket before the positioning guide rod 2, and is embedded in the through hole in the middle of the gasket, and is tightly connected to the gasket. The conical structure can adapt to most gaskets, thereby improving practicality.

[0037] like Figure 3 As shown, two groups of movable slots 11 are symmetrically provided on the side of the wrench body 1, and the lever 5 is embedded in the slot and rotatably connected to the wrench body 1. The lever 5 is a triangular structure, and a groove is provided at the acute-angle end of the lever 5. The acute-angle end of the lever 5 is rotatably connected to the inner wall of the movable slot 11 through a connecting shaft 51. A torsion spring 52 is embedded in the groove of the lever 5, and the torsion spring 52 is movably sleeved on the connecting shaft 51. The two ends of the torsion spring 52 are respectively abutted against the movable slot 11 and the lever 5, and the lever 5 can be completely embedded in the movable slot 11. Under the action of the torsion spring 52, the lever 5 is normally rotated out of the movable slot 11 by a certain angle, and most of the lever 5 protrudes from the surface of the wrench body 1. When the lever 5 is opened, the width of the wrench body 1 is increased. When the wrench body 1 is in use, the user holds the wrench body 1 and applies force with his fingers against the lever 5. Since the lever 5 increases the torque, it is more labor-saving to tighten the screw, reducing the manpower burden.

[0038] When dismantling the permanent magnet machine, the nuts, screws, etc. of the permanent magnet machine base are dismantled using the utility model, and the screws, nuts, screws, etc. adapted to the ratchet socket head 4 are used for dismantling, and the clamping block 3 is used to rotate and adjust the adjusting screw with the clamping slot, and at the same time, the positioning guide rod 2 is embedded in the adjusting screw, and the positioning cone head 21 is embedded in the gasket hole at the bottom of the adjusting screw to position it, and then the wrench body 1 is rotated through the wrench block 5.

[0039] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the preferred embodiment of the present invention, and the present invention can be fully understood by those skilled in the art without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A special tool for adjusting screws of permanent magnet machine base in power plant, characterized in that: It includes a wrench body, the upper end face of the wrench body is fixedly connected to a ratchet socket head, the lower end face of the wrench body is fixedly connected to a positioning guide rod, two groups of clamping blocks are symmetrically arranged on the side of the positioning guide rod, the clamping blocks are fixedly connected to the lower end face of the wrench body, two groups of lever blocks are embedded and connected to the side of the wrench body, the two groups of lever blocks are symmetrically distributed, and the plates are rotatably connected to the wrench body.

2. The special tool for adjusting screws of permanent magnet machine base in power plant according to claim 1, characterized in that: The wrench body is a cylindrical structure with a diameter of 50 mm and a height of 45 mm. The wrench body is made of metal material.

3. The special tool for adjusting screws of permanent magnet machine base in power plant according to claim 1, characterized in that: The width of the clamping block is 5.2 mm, the height of the clamping block is 6 mm, and the clamping block is integrally connected with the wrench body.

4. The special tool for adjusting screws of permanent magnet machine base in power plant according to claim 1, characterized in that: The outer contour of the ratchet sleeve head is a regular hexagonal structure, and a ratchet slot is provided on the surface of the ratchet sleeve head.

5. The special tool for adjusting screws of permanent magnet machine base in power plant according to claim 1, characterized in that: The diameter of the positioning guide rod is 22 mm, the positioning guide rod is coaxially arranged with the wrench body, and the positioning guide rod is integrally connected with the wrench body.

6. The special tool for adjusting screws of permanent magnet machine base in power plant according to claim 1, characterized in that: A positioning cone head is arranged at the bottom of the positioning guide rod, and the positioning cone head is integrally connected with the positioning guide rod.

7. The special tool for adjusting screws of permanent magnet machine base in power plant according to claim 1, characterized in that: Two groups of movable slots are symmetrically provided on the side of the wrench body, and the wrench blocks are embedded in the slots and are rotatably connected to the wrench body.

8. The special tool for adjusting screws of permanent magnet machine base in power plant according to claim 1, characterized in that: The pull block is in a triangular structure, a groove is provided at the acute-angle end of the pull block, and the acute-angle end of the pull block is rotatably connected to the inner wall of the movable slot through a connecting shaft.

9. The special tool for adjusting screws of permanent magnet machine base in power plant according to claim 1, characterized in that: A torsion spring is embedded in the groove of the pull block, and the torsion spring is movably sleeved on the connecting shaft. Two ends of the torsion spring are respectively in contact with the movable clamping groove and the pull block.

10. The special tool for adjusting screws of permanent magnet machine base in power plant according to claim 1, characterized in that: The pull block can be completely embedded in the movable slot.