CN220408249U - Hand-held electric grinding and repairing tool in narrow space - Google Patents
Hand-held electric grinding and repairing tool in narrow space Download PDFInfo
- Publication number
- CN220408249U CN220408249U CN202321991297.3U CN202321991297U CN220408249U CN 220408249 U CN220408249 U CN 220408249U CN 202321991297 U CN202321991297 U CN 202321991297U CN 220408249 U CN220408249 U CN 220408249U
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- shell
- grinding
- wheel
- driven wheel
- pressing plate
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- 238000003825 pressing Methods 0.000 claims abstract description 15
- 238000005498 polishing Methods 0.000 abstract description 4
- 238000005520 cutting process Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 17
- 238000007790 scraping Methods 0.000 description 5
- 210000004907 gland Anatomy 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The utility model provides a handheld electric grinding and repairing tool in a narrow space, which is suitable for the technical field of installation and overhaul work of a steam turbine generator unit, and particularly aims at grinding and repairing a steam seal piece in the narrow space of a steam turbine body, and is safe, quick, convenient, time-saving and labor-saving. The utility model comprises a driving wheel, a driven wheel, a connecting piece and a shell assembly, wherein a shell is arranged at a power shaft of the angle grinder, and the shell is connected with the angle grinder by using the connecting piece and fastened by adopting a bolt; the driving wheel and the driven wheel are fixed in the shell and are respectively fastened by a main pressing plate and a driven pressing plate, and the driving wheel is connected with the driven wheel belt; the grinding wheel used for grinding is fixed on the driven wheel shaft by a plate pressing plate, and the grinding wheel is arranged outside the shell. When in use, the conventional angle grinder is used as a power source, and the driving wheel drives the driven wheel and the grinding wheel to rotate through the belt, so that the purpose of grinding and repairing is achieved. The technical scheme of the utility model solves the problem of difficult study and repair in the narrow space in the prior art, and can be also applied to equipment polishing, cutting and other operations in other equipment narrow spaces.
Description
Technical Field
The utility model relates to a narrow space grinding operation, in particular to a handheld electric grinding and repairing tool for installing and repairing a narrow space, which is especially aimed at grinding and scraping a dynamic steam seal piece of a narrow space of a turbine body, and has the advantages of simple structure, rapidness, convenience, time saving and labor saving.
Background
The steam turbine is a large-scale high-temperature high-pressure machine rotating at high speed, in order to prevent high-temperature high-pressure steam from leaking, steam sealing sheets are arranged between the moving and static parts, the clearance requirements of the steam sealing sheets are strict, the machining is precise, and the space of part of the position is narrow. Aiming at the narrow space, the conventional grinding and repairing of the steam sealing piece of the turbine shroud ring adopts a common long-handle flat scraper which stretches into a narrow space embedded partition plate, the manual grinding and repairing of the steam sealing piece is carried out, the one-time scraping amount is small, the manual force is not easy to master, the thickness of the steam sealing piece is generally 1-2mm, the manual grinding and repairing easily causes the damage of the steam sealing piece, and the repairing process hardly meets the design requirements of a manufacturing plant.
Disclosure of Invention
The utility model provides a hand-held electric grinding tool in a narrow space, which solves the problems of manual scraping, thick front size, short length and incapability of extending into the narrow space for grinding of conventional electric tools such as an angle grinder and the like.
In order to achieve the above purpose, the following technical scheme is adopted:
a hand-held, power-driven, narrow space grinding tool comprising: the device comprises a shell, a driving wheel, a driven wheel, a connecting piece, a bearing, a main pressing plate, a secondary pressing plate, a sheet pressing plate, a shield, a belt and an adjustable limit; the connecting piece is positioned on the upper surface of the rear end of the shell and connected with a connecting port on the shell, the connecting piece is fastened on the upper surface of the rear end of the shell through a bolt, the connecting piece is connected with the connecting port on the shell and fastened on the shell through a bolt, the driving wheel is positioned in the shell and connected with a power shaft of the angle grinder through the connecting piece, the driven wheel is connected with the driving wheel through a belt, a conventional grinding wheel is arranged on the outer side of the shell of the power output end, and a semicircular shield is arranged on the periphery of the grinding wheel;
further, the bearing is welded and fixed on the shell, the tolerance fit between the driven wheel and the bearing is 0.02-0.06mm, the driven wheel is fastened by using a secondary pressing plate, and the design size of the driven wheel and the shell is 41mm;
further, the shell adopts a full-surrounding design, and the driving wheel and the driven wheel are completely surrounded in the shell;
further, an adjustable limit is arranged outside the output power end of the shell, and the height of the adjustable limit is 4-7mm lower than the excircle of the grinding wheel.
The utility model has the following advantages:
1. the handheld electric grinding tool for overhauling the narrow space is connected with the conventional angle grinder by arranging the shell, the jackscrews are fastened on the shell, and the rear of the shell is fixedly connected with the angle grinder by adopting a bolt connection mode of the connecting piece, so that the handheld electric grinding tool is simple in structure and high in stability.
2. The handheld electric grinding tool for repairing the narrow space uses the conventional angle grinder as a power source, and the lengthened shell is arranged at the power shaft of the angle grinder and can be designed according to the depth of the narrow space. The casing adopts the mode of fully enclosing, and the rotating part (except for the sand wheel piece) designs in the casing, protects operating personnel's personal safety.
3. The handheld electric grinding tool for repairing the narrow space provided by the utility model adopts the belt to connect the driven wheel and the driving wheel to transmit power, so that the effect of buffering the rotating speed can be achieved when the grinding force is large, and the operation safety of operators is ensured.
4. According to the handheld electric grinding and repairing tool for repairing narrow spaces, the tolerance fit between the driven wheel and the bearing is 0.02-0.06mm, the driven wheel is fastened by the auxiliary pressing plate, the flexibility and the safety of rotation of the driven wheel are guaranteed, the thickness dimension of the shell is reduced, the width of the shell can be ensured, the strength of the shell can be ensured, meanwhile, the shell can be stretched into the narrow spaces for operation, the total thickness is 41mm, and the grinding and repairing operation can be performed in the spaces larger than 41mm.
5. The handheld electric grinding tool for repairing the narrow space provided by the utility model has the advantages that the output power end is designed and provided with the conventional grinding wheel, the position of the output power end is outside the shell, the grinding wheel is convenient to replace at any time, and the outer circle of the grinding wheel is provided with the protective cover to prevent grinding splash from flying out to hurt people.
6. The handheld electric grinding tool for repairing the narrow space is provided with the adjustable limit caliper, the height of the handheld electric grinding tool is 4-7mm lower than the outer circle of the grinding wheel, the adjustable limit caliper can be adjusted according to the height and the grinding amount of the blade, the single grinding amount is controllable, the grinding size error of each gland sealing piece is less than 0.10mm, the grinding precision of the gland sealing piece is ensured, the maintenance quality of the gland sealing piece is improved, the gland sealing piece is protected from being damaged in the grinding process, and the maintenance process meets the design requirements of a manufacturing plant. Compared with manual scraping, the handheld electric grinding and repairing tool in the narrow space improves working efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
fig. 2 is a schematic structural diagram of a driving wheel according to the present utility model;
FIG. 3 is a schematic view of the structure of the driven wheel of the present utility model;
fig. 4 is a schematic structural view of a connector according to the present utility model.
In the figure: 1. a housing; 2. a driving wheel; 3. driven wheel; 4. a connecting piece; 5. a bearing; 6. a main pressing plate; 7. a slave platen; 8. a sheet pressing plate; 9. a shield; 10. a belt; 11. and (5) adjustable limiting.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model:
as shown in fig. 1-4, the connecting piece 4 is located on the upper surface of the rear end of the shell 1, connected with a connecting port on the shell 1, fastened on the shell 1 through bolts, the connecting piece 4 is located on the upper surface of the rear end of the shell 1, connected with the connecting port on the shell 1, fastened on the shell 1 through bolts, the driving wheel 2 is located inside the shell 1, connected with a power shaft of the angle grinder through the connecting piece 4, the driven wheel 3 is connected with the driving wheel 2 through a belt 10, the driven wheel 3 is designed and installed with a conventional grinding wheel, the position is outside the shell 1 at the power output end, and the periphery of the grinding wheel is designed with a semicircular shield 9.
The grinding wheel for scraping is fastened by a plate pressing plate 8, the grinding wheel is protected from splashing by a protective cover, the driving wheel 2 and the driven wheel 3 adopt a belt 10 for driving power, the driving wheel 2 and the driven wheel 3 are fixed on a shell, and the shell adopts a full-surrounding mode. The driven wheel end adopts an adjustable limit 11 to ensure that the grinding of the steam seal teeth is controllable.
The driven wheel 3 is in clearance fit with the bearing 5; the fit clearance is 0.02-0.06mm.
Example 1
When the device is used, the switch of the angle grinder is turned on, the power shaft of the angle grinder drives the driving wheel 2 to rotate, the belt 10 drives the grinding wheel on the driven wheel 3 to rotate, and the grinding wheel stretches into a narrow space to grind and repair the steam sealing piece. In addition, an adjustable limit caliper 11 is designed outside the shell 1 at the driven wheel end, the size of the steam sealing piece to be polished is calculated according to the height and the polishing amount of the steam sealing piece, then the height of the adjustable limit caliper 11 is adjusted, the steam sealing piece is polished by taking the inner circle of the root of the steam sealing piece as a reference, the polishing size error of the steam sealing piece is less than 0.10mm each time, and the polishing precision of the steam sealing piece is greatly improved.
The grinding wheel can be replaced by a grinding disc or a slicing disc, and the grinding wheel can be applied to equipment in other equipment narrow spaces for grinding, cutting and other operations; the grinding wheel is replaced by a steel wire bowl brush, and the steel wire bowl brush can extend into a narrow space for cleaning operation.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; the present utility model has been described in detail with reference to the foregoing embodiments, and it should be understood by those of ordinary skill in the art.
Claims (4)
1. The utility model provides a handheld electronic tool of repairing in narrow space which characterized in that:
comprising the following steps: the device comprises a shell (1), a driving wheel (2), a driven wheel (3), a connecting piece (4), a bearing (5), a main pressing plate (6), a secondary pressing plate (7), a sheet pressing plate (8), a shield (9), a belt (10) and an adjustable limit (11);
the connecting piece (4) is located the upper surface of the rear end of the shell (1), is connected with a connecting port on the shell (1) and is fastened on the shell (1) through bolts, the driving wheel (2) is located inside the shell and is connected with a power shaft of the angle grinder through the connecting piece (4), the driven wheel (3) is connected with the driving wheel (2) through a belt (10), the driven wheel (3) is designed and installed with a conventional grinding wheel, the position is outside the shell (1) at the power output end, and a semicircular shield (9) is designed at the periphery of the grinding wheel.
2. The confined space hand-held power tool of claim 1, wherein: the bearing (5) is welded and fixed on the shell (1), the tolerance fit between the driven wheel (3) and the bearing (5) is 0.02-0.06mm, the driven wheel (3) and the shell (1) are fastened by using the secondary pressing plate (7), and the design size of the driven wheel (3) and the shell (1) is 41mm.
3. The confined space hand-held power tool of claim 1, wherein: the shell (1) adopts a full-surrounding design, and the driving wheel (2) and the driven wheel (3) are completely surrounded in the shell.
4. The confined space hand-held power tool of claim 1, wherein: the adjustable limit (11) is arranged outside the output power end of the shell (1), and the height of the adjustable limit is 4-7mm lower than the excircle of the grinding wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321991297.3U CN220408249U (en) | 2023-07-26 | 2023-07-26 | Hand-held electric grinding and repairing tool in narrow space |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321991297.3U CN220408249U (en) | 2023-07-26 | 2023-07-26 | Hand-held electric grinding and repairing tool in narrow space |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220408249U true CN220408249U (en) | 2024-01-30 |
Family
ID=89657136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321991297.3U Active CN220408249U (en) | 2023-07-26 | 2023-07-26 | Hand-held electric grinding and repairing tool in narrow space |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220408249U (en) |
-
2023
- 2023-07-26 CN CN202321991297.3U patent/CN220408249U/en active Active
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