Grinding wheel special for grinding construction in nuclear power field

Abstract

The invention provides a special grinding wheel for construction in the nuclear power field, which comprises a grinding wheel base body, a positioning groove is formed in the center of the rear side of the grinding wheel base body, a plurality of force application grooves are formed in the side wall of the positioning groove, and a positioning bolt is screwed at a positioning screw hole; an adjusting groove is formed in the grinding wheel base body, an annular groove is formed in the side face of the grinding wheel base body in the circumferential direction, and the adjusting groove is provided with a plurality of through holes communicating with the annular groove. A limiting groove is formed in the position, corresponding to the periphery of the through hole, in the grinding wheel base body, a first sliding block and a second sliding block are slidably arranged in the limiting groove, a supporting rod penetrating through the through hole to extend to the annular groove is fixedly arranged on the first sliding block, an abutting rod penetrating through the through hole to extend to the adjusting groove is arranged on the second sliding block, and the first sliding block and the second sliding block are connected through a telescopic rod. A tension spring is arranged outside the telescopic rod; a polishing unit is arranged at the end part of the supporting rod; an adjusting assembly is arranged on the grinding wheel base body. According to the structural design of the grinding wheel, the grinding wheel and grinding driving equipment can be conveniently and rapidly fixed, and the grinding operation efficiency can be guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of abrasive technology, specifically relating to a special grinding wheel for grinding in the construction of nuclear power plants. Background Technology

[0002] The steel used in nuclear power turbines is primarily 0Cr13Ni4Mo steel, which belongs to the stainless steel category. Common stainless steels are classified into austenitic, martensitic, ferritic, and austenitic-ferritic duplex stainless steels. Stainless steel possesses excellent properties such as good strength, high wear resistance, superior corrosion resistance, and resistance to rust, making it widely used in various industries. However, due to the high toughness, high thermal strength, low thermal conductivity, severe work hardening, and difficulty in heat dissipation of stainless steel, improper understanding of its properties can lead to processing difficulties and numerous defects on the processed surface, such as rust, yellow spots, scratches, burrs, and heat tempering after grinding. 0Cr13Ni4Mo steel also belongs to the special steel category of alloy tool steels, exhibiting high hardness and toughness, making it difficult for ordinary grinding wheels to meet processing requirements.

[0003] Based on practical experience, the results show that: brown fused alumina wheels have slow grinding efficiency, cause greater burns to the workpiece during grinding, and wear out quickly; white fused alumina wheels cause less burns than brown fused alumina wheels; and single-crystal fused alumina wheels are slightly better than the other two. Generally, there is a critical point for the hardness of a grinding wheel relative to the steel being ground. When the hardness of the grinding wheel exceeds this critical point, the grinding efficiency becomes slow, and burns occur to the workpiece. All three types of grinding wheels exhibit this characteristic, and if the hardness is below the critical point, the wheel's durability is poor. When the workpiece is burned, its surface, hardness, and stress all change, affecting its hardness, strength, and appearance. However, for general grinding, the above three types of grinding wheels can basically meet the needs of grinding operations. But in the production of nuclear power turbines, the grinding environment is relatively confined and the work intensity is high, requiring grinding wheels with very high grinding performance to minimize the time and frequency of wheel replacements.

[0004] Therefore, in view of the above problems, it is necessary to propose a new grinding wheel with a reasonable and reliable structural design and convenient use to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a special grinding wheel for nuclear power plant construction. The specific solution is as follows: A grinding wheel for construction in the nuclear power field includes a grinding wheel base. A positioning groove is located at the center of the rear side of the grinding wheel base. Multiple force-applying grooves are located on the sidewalls of the positioning groove, and multiple positioning screw holes are located at the bottom of the force-applying groove, where positioning bolts are screwed. An adjustment groove is located inside the grinding wheel base, and an annular groove is located on the side of the grinding wheel base along its circumference. Multiple through holes communicating with the annular groove are located in the adjustment groove. A limiting groove is located inside the grinding wheel base corresponding to the periphery of the through holes. A slider one and a slider two are slidably mounted within the limiting groove. A support rod is fixed to slider one, extending through the through hole to the annular groove. An abutment rod is located on slider two, extending through the through hole to the adjustment groove. Slider one and slider two are connected by a telescopic rod, and a tension spring is located on the outside of the telescopic rod. A grinding unit is located at the end of the support rod. An adjustment assembly for the abutment rod is provided on the grinding wheel base.

[0006] Based on the above, the adjustment assembly includes a screw that extends from the front side of the grinding wheel base into the adjustment groove. One end of the screw is provided with a handle, and the other end of the screw is connected to a frustum-shaped push head via a rotary joint. The side of the push head abuts against the abutting rod.

[0007] Based on the above, the grinding unit includes a metal sheet, a grinding layer on the upper side of the metal sheet, diamond particles evenly distributed on the surface of the grinding layer, and a positioning cylinder for connecting to the support rod on the lower side of the metal sheet.

[0008] Based on the above, the metal sheet has folded edge structures on both the left and right sides.

[0009] Based on the above, the positioning cylinder and the support rod are fixed together by welding.

[0010] Based on the above, the positioning cylinder is screwed together with the support rod.

[0011] Based on the above, the left and right cross sections of the metal sheet are arc-shaped, and according to the rotation direction of the grinding wheel, the distance between the front end of the metal sheet and the grinding wheel base is smaller than that between the rear end and the front end.

[0012] Based on the above, the annular groove is also provided with multiple fan blades.

[0013] This invention has outstanding substantive features and significant progress compared to the prior art. Specifically, this invention has the following advantages: 1. The grinding wheel for nuclear power plant construction provided by this invention has a structural design that not only facilitates quick fixing of the grinding wheel to the grinding drive equipment and ensures the stability of the installation structure when the grinding wheel is in use, but also allows for quick replacement of a grinding unit when it is severely worn during use, ensuring work efficiency. Furthermore, the replaced grinding unit is easy to repair and reuse.

[0014] 2. The grinding wheel for nuclear power plant construction provided by this invention uses a tension spring that can adjust the elastic thrust to reduce rigid impact when it comes into contact with the workpiece being ground. This buffered structure design can ensure the grinding effect and avoid problems such as damage to the grinding wheel or grinding burns to the workpiece due to excessive pressure when in contact with the workpiece. The structure design is ingenious and has good practicality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a rear view of the present invention; Figure 3 This is a front view of the present invention; Figure 4 This is a schematic diagram of a partial mating structure of the present invention; Figure 5 This is a schematic diagram of the grinding unit in this invention; Figure 6 yes Figure 2 Cross-sectional view along the OO direction; In the diagram: 1. Grinding wheel base; 2. Adjustment groove; 3. Screw; 4. Handle; 5. Push head; 6. Through hole; 7. Limiting groove; 8. Support rod; 9. Slider 1; 10. Telescopic rod; 11. Slider 2; 12. Abutment rod; 13. Tension spring; 14. Positioning groove; 15. Force application groove; 16. Positioning screw hole; 17. Annular groove; 18. Grinding unit; 18-1. Metal sheet; 18-2. Grinding layer; 18-3. Diamond particles; 18-4. Positioning cylinder; 19. Fan blade. Detailed Implementation

[0016] The technical solution of the present invention will be further described in detail below through specific embodiments.

[0017] Example 1 like Figure 1-6As shown, this invention provides a special grinding wheel for nuclear power plant construction, comprising a grinding wheel base 1. A positioning groove 14 is provided at the rear center of the grinding wheel base 1. Multiple force-applying grooves 15 are provided on the sidewall of the positioning groove 14. Multiple positioning screw holes 16 are provided at the bottom of the force-applying grooves 15, so positioning bolts are screwed into the positioning screw holes 16. An adjustment groove 2 is provided inside the grinding wheel base 1. An annular groove 17 is provided on the sidewall of the grinding wheel base 1 along the circumference. Multiple through holes 6 communicating with the annular groove 17 are provided in the adjustment groove 2. The grinding wheel base 1 has internal corresponding... A limiting groove 7 is provided around the through hole 6. A slider 1 9 and a slider 2 11 are slidably provided in the limiting groove 7. A support rod 8 is fixed on the slider 1 9, which extends through the through hole 6 to the annular groove 17. A contact rod 12 is provided on the slider 2 11, which extends through the through hole 6 to the adjustment groove 2. The slider 1 9 and the slider 2 11 are connected by a telescopic rod 10. A tension spring 13 is provided on the outside of the telescopic rod 10. A grinding unit 18 is provided at the end of the support rod 8. An adjustment component for the contact rod 12 is provided on the grinding wheel base 1.

[0018] The aforementioned adjustment assembly is used to adjust the position of the abutment rod 12, thereby adjusting the compression degree of the tension spring 13, and thus adjusting the stiffness of the grinding unit 18 during use. It includes a screw 3, which extends from the front side of the grinding wheel base 1 into the adjustment groove 2. One end of the screw 3 is provided with a handle 4, and the other end of the screw 3 is connected to a frustum-shaped push head 5 through a rotary joint. The side of the push head 5 abuts against the abutment rod 12.

[0019] The aforementioned grinding unit 18 includes a metal sheet 18-1, a grinding layer 18-2 on the upper side of the metal sheet 18-1, diamond particles 18-3 evenly distributed on the surface of the grinding layer 18-2, and a positioning cylinder 18-4 for connecting with the support rod 8 on the lower side of the metal sheet 18-1.

[0020] Considering that the grinding wheel sometimes needs to move laterally during grinding, in order to ensure the normal use of the grinding wheel, folded edge structures are provided on both the left and right sides of the metal sheet 18-1, and the bending position is arc-shaped.

[0021] To ensure the rigidity of the connection between the grinding unit 18 and the support rod 8, the positioning cylinder 18-4 and the support rod 8 are fixed together by welding.

[0022] It should be noted that the left and right cross sections of the aforementioned metal sheet 18-1 are arc-shaped. According to the rotation direction of the grinding wheel, the distance between the front end of the metal sheet 18-1 and the grinding wheel base 1 is smaller than that between the rear end and the front end.

[0023] To facilitate timely heat dissipation of the workpiece at the grinding location and remove grinding debris from the workpiece surface, multiple fan blades 19 are also provided in the annular groove 17.

[0024] Example 2 Unlike Embodiment 1, the positioning cylinder 18-4 is screwed together with the support rod 8 to facilitate the replacement of the grinding unit 18.

[0025] When using this grinding wheel, first insert the output shaft of the grinding equipment into the positioning groove 14. A force-applying plate corresponding to the force-applying groove 15 is fixed on the output shaft. The force-applying plate has mounting holes corresponding to the positioning screw holes 16. Then, the force-applying plate is fixed to the grinding wheel base 1 using positioning bolts. This grinding wheel's structural design not only facilitates quick and easy fixing of the grinding wheel to the grinding drive equipment and ensures stable installation during use, but also allows for rapid replacement of any grinding unit 18 that experiences severe wear, ensuring work efficiency. Furthermore, the replaced grinding unit 18 is easily repaired and reused later.

[0026] In addition, when the grinding wheel is in use, the position of the push head 5 can be adjusted by rotating the screw 3, thereby adjusting the thrust applied by the tension spring 13 to the slider 9. This ensures that when the grinding unit 18 is in use, the tension spring 13, which can adjust the elastic thrust, reduces rigid impact when it comes into contact with the workpiece being ground. This buffered structure design can not only ensure the grinding effect, but also avoid problems such as damage to the grinding wheel or grinding burns to the workpiece caused by excessive squeezing force when in contact with the workpiece.

[0027] 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 preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A special grinding wheel for construction in the nuclear power field, characterized in that: The grinding wheel includes a grinding wheel base (1), a positioning groove (14) is provided at the rear center of the grinding wheel base (1), a plurality of force-applying grooves (15) are provided on the side wall of the positioning groove (14), and a plurality of positioning screw holes (16) are provided at the bottom of the force-applying groove (15), so a positioning bolt is screwed into the positioning screw hole (16); an adjustment groove (2) is provided inside the grinding wheel base (1), an annular groove (17) is provided on the side of the grinding wheel base (1) along the circumferential direction, and a plurality of through holes (6) communicating with the annular groove (17) are provided in the adjustment groove (2); a limiting groove (7) is provided inside the grinding wheel base (1) corresponding to the periphery of the through hole (6). Sliding slider 1 (9) and slider 2 (11) are slidably provided in the limiting groove (7). A support rod (8) is fixed on slider 1 (9) and extends through the through hole (6) to the annular groove (17). A contact rod (12) is provided on slider 2 (11) and extends through the through hole (6) to the adjustment groove (2). Sliding slider 1 (9) and slider 2 (11) are connected by a telescopic rod (10). A tension spring (13) is provided on the outside of the telescopic rod (10). A grinding unit (18) is provided at the end of the support rod (8). An adjustment component for the contact rod (12) is provided on the grinding wheel base (1).

2. The grinding wheel for nuclear power plant construction as described in claim 1, characterized in that: The adjustment assembly includes a screw (3) which extends from the front side of the grinding wheel base (1) into the adjustment groove (2). One end of the screw (3) is provided with a handle (4), and the other end of the screw (3) is connected to a frustum-shaped push head (5) through a rotary joint. The side of the push head (5) abuts against the abutting rod (12).

3. The grinding wheel for nuclear power plant construction as described in claim 1, characterized in that: The grinding unit (18) includes a metal sheet (18-1), a grinding layer (18-2) is provided on the upper side of the metal sheet (18-1), diamond particles (18-3) are evenly distributed on the surface of the grinding layer (18-2), and a positioning cylinder (18-4) is provided on the lower side of the metal sheet (18-1) for connecting with the support rod (8).

4. The grinding wheel for nuclear power plant construction as described in claim 3, characterized in that: The metal sheet (18-1) has folded edge structures on both the left and right sides.

5. The grinding wheel for nuclear power plant construction as described in claim 3, characterized in that: The positioning cylinder (18-4) and the support rod (8) are fixed together by welding.

6. The grinding wheel for nuclear power plant construction as described in claim 3, characterized in that: The positioning cylinder (18-4) is screwed together with the support rod (8).

7. The grinding wheel for nuclear power plant construction as described in claim 3, characterized in that: The metal sheet (18-1) has an arc-shaped cross section on the left and right sides. According to the rotation direction of the grinding wheel, the distance between the front end of the metal sheet (18-1) and the grinding wheel base (1) is smaller than that between the rear end and the front end.

8. The grinding wheel for nuclear power plant construction as described in claim 1, characterized in that: The annular groove (17) is also provided with multiple fan blades (19).

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