Sand blasting shielding tool for casting electrode of resin insulating spacer

Abstract

The utility model provides a sand blasting shielding tool for casting an electrode of a resin insulating spacer, which comprises a first shielding piece, a second shielding piece and a third shielding piece, and the first shielding piece is provided with a first joint surface close to a first surface of the electrode so as to shield the first surface; the second shielding piece is provided with a second joint surface which is close to a second surface, opposite to the first surface, of the electrode so as to shield the second surface, particularly, the first shielding piece comprises a first wear-resistant material part for providing a first joint surface, and a second wear-resistant material part for providing a second joint surface; the second shielding piece comprises a second wear-resistant material part for providing a second joint surface, and the first wear-resistant material part and the second wear-resistant material part are made of wear-resistant plastic materials. According to the sand blasting shielding tool, the first wear-resistant material part and the second wear-resistant material part which are made of the wear-resistant plastic materials are arranged, so that the wear-resistant performance is effectively improved, the service life of the tool is prolonged, and the cost problem caused by frequent replacement of the tool is further solved.

Description

Technical Field

[0001] The utility model belongs to the field of resin casting insulation parts, in particular to a sandblasting and shielding tool for electrodes of resin casting insulation basins. Background Art

[0002] Pot insulators are critical insulating components in high-voltage switchgear, primarily providing insulation, support, and isolation for the gas chamber. Cast resin insulator pots are a common type of pot insulator. Made primarily of epoxy resin, they offer high insulation performance, structural strength, and excellent sealing properties, making them widely used in the insulation and packaging of high- and low-voltage electrical appliances, motors, and electronic components.

[0003] Currently, the conventional manufacturing method for epoxy cast insulators primarily involves the following processes: mold preparation, surface treatment of inserts such as the center conductor, casting compound preparation, insert placement, casting, curing, and demolding. The surface treatment of the insert not only affects the bonding strength between the insert and the epoxy resin, and thus the mechanical strength of the finished insulation tray, but also impacts the electrical performance of the insulation tray. In particular, the surface treatment of the embedded electrodes directly impacts both the mechanical and electrical properties of the insulation tray.

[0004] The conventional surface treatment method currently used is to sandblast and ultrasonically clean metal inserts such as electrodes. The sandblasting process mainly involves sandblasting the bonding surface of the metal insert used for bonding with epoxy resin to increase the roughness of the bonding surface, thereby improving the bonding strength between the bonding surface and the epoxy resin. During the sandblasting process, it should be ensured that the sandblasting range meets the requirements of the drawings and does not intrude into areas that do not require sandblasting, such as the conductive surface of the electrode. Otherwise, it will affect the electrical performance of the electrode and even the entire insulating basin. Therefore, when implementing sandblasting, a sandblasting masking tool is usually used to mask the surfaces of the electrode that do not require sandblasting to prevent sand particles from adhering to these areas.

[0005] The sandblasting masking tooling currently used is made of metal materials such as iron or stainless steel. However, these commonly used metal materials are prone to wear, which affects their shielding effectiveness. Consequently, these sandblasting masking tools have a short service life and require frequent replacement, which inadvertently increases costs. Furthermore, during the sandblasting process, the jet of air can easily create gaps between the tooling and the electrode, causing sand particles to enter the shielded area, effectively leaking sand, which in turn affects the electrical performance of the electrode and the insulating basin. Furthermore, due to the rigid nature of metal, once a gap is created in the contact surface with the electrode, it is difficult to restore the sealing effect.

[0006] Therefore, it is necessary to provide a sandblasting masking tool with enhanced wear resistance and sealing performance. Utility Model Content

[0007] The present disclosure aims to provide a sandblasting masking tool for electrodes of cast resin insulating basins, which at least partially eliminates the defects of the prior art.

[0008] An object of the present disclosure is to provide a sandblasting shielding tool for electrodes of cast resin insulating basins, which has better wear resistance and longer service life.

[0009] Another object of the present disclosure is to provide a sandblasting shielding tool for electrodes cast in resin insulating basins, which can more effectively prevent sand leakage.

[0010] To achieve at least one of the above-mentioned purposes, according to one aspect of the present disclosure, a sandblasting shielding tool for electrodes of cast resin insulating basins is provided, comprising: a first shielding member having a first joint surface for being close to a first surface of the electrode to shield the first surface; and a second shielding member having a second joint surface for being close to a second surface opposite to the first surface of the electrode to shield the second surface. In particular, the first shielding member includes a first wear-resistant material portion for providing a first joint surface, and the second shielding member includes a second wear-resistant material portion for providing a second joint surface, wherein the first wear-resistant material portion and the second wear-resistant material portion are both made of wear-resistant plastic material.

[0011] Compared with the existing sandblasting masking tooling made of metal materials such as iron or stainless steel, the sandblasting masking tooling disclosed in the present invention effectively improves the wear resistance and increases the service life of the tooling by setting a first wear-resistant material part and a second wear-resistant material part made of wear-resistant plastic material, thereby solving the cost problem caused by frequent replacement of tooling.

[0012] Furthermore, the first shielding member includes an end cap including a first wear-resistant material portion facing the electrode; and a pull ring detachably mounted on the side of the end cap facing away from the electrode. This configuration of the first shielding member improves wear resistance while also facilitating manual tightening, improving assembly and disassembly efficiency.

[0013] Optionally, the end cover may be entirely composed of the first wear-resistant material portion, which will facilitate the processing and manufacturing of the end cover.

[0014] Furthermore, the second shielding member includes: a base, which includes a second wear-resistant material portion facing the electrode; and a shaft, which is fixed at the center of the side of the base facing away from the electrode, and is used to be connected to the rotating shaft of the sandblasting machine to drive the sandblasting shielding tooling to rotate under the drive of the rotating shaft.

[0015] Specifically, an annular boss is provided on the side of the base facing the electrode, and the second wear-resistant material portion is detachably nested around the outer periphery of the annular boss. This structure improves the wear resistance of the base and facilitates replacement of the second wear-resistant material portion, thereby reducing costs.

[0016] Alternatively, the base may be entirely made of the second wear-resistant material portion to facilitate processing and manufacturing.

[0017] Further, the first wear-resistant material portion includes a first seal arranged on the first joint surface to seal the gap between the first joint surface and the first surface in the assembled state; and the second wear-resistant material portion includes a second seal arranged on the second joint surface to seal the gap between the second joint surface and the second surface in the assembled state, wherein the size and shape of the first seal are adapted to the size and shape of the shielded area of ​​the first surface; and the size and shape of the second seal are adapted to the size and shape of the shielded area of ​​the second surface.

[0018] By providing the first and second sealing members, the shielding effect of the sandblasting shielding tool on the first and second surfaces of the electrode can be effectively improved, preventing sand leakage during the sandblasting process, thereby avoiding electrical failures caused by excessive roughness of the conductive surface. In addition, the flexibility of the first and second sealing members can also compensate for surface unevenness caused by insufficient manufacturing precision or wear and deformation of the first and second joint surfaces, thereby helping to reduce the machining precision requirements for the joint surfaces and thus helping to reduce production costs. Furthermore, the size and shape of the first and second sealing members are set so that a shielded area that accurately corresponds to the predetermined area can be formed.

[0019] Furthermore, the first shielding member and the second shielding member are respectively connected to the first surface and the second surface of the electrode by screw threads, which facilitates installation and disassembly between the sandblasting shielding tooling and the electrode and adjustment of the degree of fit between the surfaces.

[0020] Preferably, a first threaded hole is provided on the first surface of the electrode, and a first stud is provided on the side of the end cover facing the first surface, and the first surface and the first joint surface are brought into close contact and fixed through the threaded connection between the first threaded hole and the first stud; and a second threaded hole is provided on the second surface of the electrode, and a second stud is provided on the side of the base facing the second surface, and the second surface and the second joint surface are brought into close contact and fixed through the threaded connection between the second threaded hole and the second stud.

[0021] Preferably, the end cap and the base are both disc-shaped, so as to facilitate the stable rotation of the tooling and the clamped electrode in the sandblasting machine, thereby improving the uniformity of sandblasting.

[0022] According to the sandblasting shielding tooling for electrodes of cast resin insulating basins disclosed herein, by arranging the first and second wear-resistant material parts composed of wear-resistant plastic materials at the easily worn parts of the first and second shielding parts, or making the first and second shielding parts entirely composed of wear-resistant plastic materials, the wear resistance is effectively improved and the service life of the tooling is increased. Moreover, the wear-resistant plastic materials are commonly used and easily obtained materials, so the tooling is easy to manufacture and will not lead to an increase in material costs, effectively solving the cost problem caused by frequent replacement of metal tooling in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The features and advantages of one or more embodiments of the present invention will become more readily understood through the following description with reference to the accompanying drawings. The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. The drawings are not drawn to scale and some features may be exaggerated or reduced to show details of specific components. In the drawings:

[0024] Figure 1 Schematic diagram of a sandblasting masking tool for electrodes of a cast resin insulating basin according to an embodiment of the present disclosure.

[0025] Description of Figure Numbers:

[0026] 10 electrode 12 First surface 14 Second surface 16 First threaded hole S1 First seal S2 Second seal 20 First shielding member 22 End cap 23 First Wear-Resistant Materials Department 24 First joint surface 25 pull ring 30 Second shielding member 31 base 32 Annular boss 33 Second Wear-Resistant Materials Department 34 Second joint surface 35 groove 36 Second stud 37 shaft DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form.

[0029] Figure 1The figure is a schematic diagram of a sandblasting masking tool for an electrode used in a cast resin insulation basin according to an embodiment of the present disclosure. In this example, the electrode 10 is generally drum-shaped, with a circular first surface 12 and a second surface 14 being smooth and clean to serve as conductive surfaces. During the sandblasting process, the first and second surfaces 12, 14 are masked with a sandblasting masking tool of a specific shape and size to prevent sand particles from adhering to them. The outer peripheral surface of the electrode 10 is exposed to facilitate sandblasting to increase its roughness, thereby enhancing the bonding strength between the electrode 10 and the epoxy resin.

[0030] See also Figure 1 According to an embodiment of the present disclosure, a sandblasting masking tool for an electrode of a cast resin insulating basin includes: a first shielding member 20, the first shielding member 20 having a first joint surface 24 for being close to the first surface 12 of the electrode 10 to mask the first surface 12; a second shielding member 30, the second shielding member 30 having a second joint surface 34 for being close to the second surface 14 of the electrode 10 opposite to the first surface 12 to mask the second surface 14. In particular, the first shielding member 20 includes a first wear-resistant material portion 23 for providing the first joint surface 24, and the second shielding member 30 includes a second wear-resistant material portion 33 for providing the second joint surface 34, wherein the first wear-resistant material portion 23 and the second wear-resistant material portion 33 are both made of wear-resistant plastic material.

[0031] Compared with the existing sandblasting masking tooling made of metal materials such as iron or stainless steel, the sandblasting masking tooling according to the present invention effectively improves the wear resistance and increases the service life of the tooling by setting a first wear-resistant material part 23 and a second wear-resistant material part 33 composed of wear-resistant plastic material, thereby solving the cost problem caused by frequent replacement of tooling.

[0032] As examples, wear-resistant plastic materials may include polytetrafluoroethylene (PTFE), ultra-high molecular weight polyethylene (UHMW), polyurethane (PU), and nylon. From the perspectives of economy and practicality, polyurethane (PU) is preferred. These materials are commonly used and readily available, so the sandblasting masking tooling according to the present disclosure is easily available and does not increase material costs.

[0033] The following will be combined Figure 1 The structures of the first shielding member 20 and the second shielding member 30 according to an embodiment of the present disclosure will be described in detail.

[0034] See also Figure 1The first shielding member 20 includes an end cap 22 and a pull ring 25, wherein the end cap 22 is made entirely of a wear-resistant plastic material, and the pull ring 25 is detachably mounted on the side of the end cap 22 facing away from the electrode 10. Before sandblasting, the end cap 22 can be connected to the electrode 10 by screwing. Specifically, a first threaded hole 16 can be provided on the first surface 12 of the electrode 10, and a corresponding first stud (not shown) can be provided on the lower surface of the end cap 22, i.e., the first joint surface 24. The first surface 12 and the first joint surface 24 are brought into close contact and fixed by the threaded connection between the first stud and the first threaded hole 16. Similarly, the pull ring 25 can be welded to the end of the first stud and then fastened to the upper surface of the end cap 22 by the first stud.

[0035] The first shielding member 20 of this structure has improved wear resistance on the one hand, and on the other hand, the provision of the pull ring 25 facilitates manual tightening, thereby improving assembly and disassembly efficiency.

[0036] However, the end cap 22 may not be integrally made of a wear-resistant plastic material, but may instead be provided with a first wear-resistant material portion only in an area that contacts the first surface 12 and is susceptible to wear and deformation caused by airflow impact. Such a first wear-resistant material portion can be provided in a modular structure that is easily disassembled, thereby facilitating timely replacement after wear and tear, and saving costs.

[0037] Further, see Figure 1 The second shielding member 30 includes a base 31 and a shaft 37. The base 31 includes a second wear-resistant material portion 33 facing the electrode 10. The shaft 37 is fixed at the center of the side of the base 31 facing away from the electrode 10, and is used to be connected to the rotating shaft of the sandblasting machine to drive the sandblasting shielding tooling to rotate under the drive of the rotating shaft.

[0038] Specifically, an annular boss 32 is provided on the side of the base 31 facing the electrode 10, and the second wear-resistant material portion 33 is removably nested within the outer periphery of the annular boss 32. The second wear-resistant material portion 33 is generally annular in shape. In the assembled state, the annular upper surface of the second wear-resistant material portion 33, i.e., the second engaging surface, is in close contact with the second surface 14 of the electrode 10. This configuration improves the wear resistance of the base 31 while facilitating replacement of the second wear-resistant material portion 33, advantageously reducing costs.

[0039] However, in order to facilitate the manufacture of the base 31 , the base may also be formed integrally from a wear-resistant plastic material.

[0040] Similar to the first shielding member 20, the second shielding member 30 can also be connected to the second surface 14 of the electrode 10 by screw threads. Figure 1As shown, a second stud 36 protruding upward is provided at the center position of the base 31, and a second threaded hole (not shown) is correspondingly provided on the second surface 14 of the electrode 10. By matching the second stud 36 with the thread of the second threaded hole, the second surface 14 and the second joint surface 34 can be brought into close contact and fixed.

[0041] In this example, the end cover 22 of the first shielding member 20 and the base 31 of the second shielding member 30 are both disc-shaped. This is because during the sandblasting process, the sandblasting shielding tooling needs to be fixed in the sandblasting machine and rotate around the central axis under the drive of the sandblasting machine's rotating shaft. The tooling is designed as a circular rotating body structure to facilitate the stable rotation of the tooling and the clamped electrode in the sandblasting machine, thereby improving the uniformity of sandblasting.

[0042] Further, see Figure 1 The first wear-resistant material portion 23 further includes a first seal S1 provided on the first joint surface 24. The first seal S1 is provided in a groove (not shown) of the first joint surface 24 adjacent to the outer edge of the first joint surface 24. In the assembled state, the first seal S1 is compressed between the first joint surface 24 and the first surface 12 to seal the gap between the first joint surface 24 and the first surface 12. Similarly, the second wear-resistant material portion 33 also includes a second seal S2 provided on the second joint surface 34. The second seal S2 is provided in a groove 35 of the second joint surface 34 adjacent to the outer edge of the second joint surface 34. In the assembled state, the second seal S2 is compressed between the second joint surface 34 and the second surface 14 to seal the gap between the second joint surface 34 and the second surface 14.

[0043] By providing the first seal S1 and the second seal S2, the shielding effect of the sandblasting shielding tool on the first surface 12 and the second surface 14 of the electrode can be effectively improved, thereby preventing sand leakage during the sandblasting process, and thus avoiding electrical failures caused by excessive roughness of the conductive surface. In addition, the flexible characteristics of the first seal S1 and the second seal S2 can also compensate for the surface unevenness caused by insufficient manufacturing accuracy or wear and deformation of the first joint surface 24 and the second joint surface 34, thereby helping to reduce the requirements for the processing accuracy of the joint surface, and thus helping to reduce production costs.

[0044] Furthermore, the size and shape of the first sealant S1 are set based on the size and shape of the predetermined shielded area of ​​the first surface 12, i.e., the sizes and shapes of the first sealant S1 and the second sealant S2 are adapted to each other. Similarly, the size and shape of the second sealant S2 are set based on the size and shape of the predetermined shielded area of ​​the second surface 14, i.e., the sizes and shapes of the second sealant S2 are adapted to each other. Thus, during the sandblasting process, the sealing and isolating effects of the first sealant S1 and the second sealant S2 effectively protect the shielded area of ​​the first surface 12 and the shielded area of ​​the second surface 14, ultimately forming a shielded area whose size and area accurately correspond to the predetermined size and area.

[0045] Summary: The sandblasting shielding tooling disclosed herein for electrodes cast in resin insulating basins includes a first shielding member and a second shielding member. The main improvement is that the surfaces of the first shielding member and the second shielding member that are close to the electrodes are both made of wear-resistant plastic material.

[0046] The advantages of the sandblasting shielding tool for electrodes of cast resin insulating basins disclosed in the present invention are as follows:

[0047] ① Compared with the existing sandblasting masking tooling made of metal materials such as iron or stainless steel, the sandblasting masking tooling disclosed in the present invention effectively improves the wear resistance and increases the service life of the tooling by setting a first wear-resistant material part and a second wear-resistant material part composed of wear-resistant plastic material, thereby solving the cost problem caused by frequent replacement of tooling.

[0048] ② The wear-resistant plastic material that can be used for the first wear-resistant material portion and the second wear-resistant material portion is a commonly used and easily available material. Therefore, the sandblasting masking tooling according to the present disclosure is easy to obtain and does not lead to an increase in material costs.

[0049] ③ The tooling is designed into a circular rotating structure to facilitate the stable rotation of the tooling and the clamped electrode in the sandblasting machine, thereby improving the uniformity of sandblasting.

[0050] ④ By setting a pull ring, it is easy to tighten manually and improve the efficiency of assembly and disassembly.

[0051] ⑤ The first wear-resistant material portion and the second wear-resistant material portion can be configured as a modular structure that is easily disassembled, so as to facilitate timely replacement after wear and tear, while also saving costs.

[0052] ⑥The end cover and the base can be integrally formed of wear-resistant plastic material, which is convenient for processing and manufacturing.

[0053] ⑦ By setting the first seal and the second seal, the shielding effect of the sandblasting shielding tool on the first surface and the second surface of the electrode can be effectively improved, and sand leakage during the sandblasting process can be prevented, thereby avoiding electrical failures caused by excessive roughness of the conductive surface. In addition, the flexible characteristics of the first seal and the second seal can also compensate for the surface unevenness caused by insufficient manufacturing accuracy or wear and deformation of the first joint surface and the second joint surface, which is conducive to reducing the requirements for the processing accuracy of the joint surface, and thus helping to reduce production costs.

[0054] While various embodiments and variations of the present invention have been described above, those skilled in the art should understand that the present invention is not limited to the specific embodiments and variations described above but rather encompasses various other possible combinations and combinations. Other variations and modifications may be implemented by those skilled in the art without departing from the spirit and scope of the present invention. All such variations and modifications are intended to fall within the scope of the present invention. Furthermore, all components described herein may be replaced by other technically equivalent components.

Claims

1. A sandblasting shielding tool for electrodes used in casting resin insulating basins, comprising: a first shielding member (20), the first shielding member (20) having a first joint surface (24) for being close to the first surface (12) of the electrode (10) to shield the first surface (12); and a second shielding member (30), the second shielding member (30) having a second joint surface (34) for being close to the second surface (14) opposite to the first surface (12) of the electrode (10) to shield the second surface (14); It is characterized by: The first shielding member (20) includes a first wear-resistant material portion (23) for providing the first joint surface (24), and the second shielding member (30) includes a second wear-resistant material portion (33) for providing the second joint surface (34), wherein the first wear-resistant material portion (23) and the second wear-resistant material portion (33) are both made of wear-resistant plastic material.

2. The sandblasting shielding tool for electrodes of cast resin insulating basins according to claim 1, characterized in that: The first shielding member (20) comprises: an end cap (22), the end cap (22) comprising the first wear-resistant material portion (23) facing the electrode (10); and A pull ring (25) is detachably mounted on a side of the end cap (22) facing away from the electrode (10).

3. The sandblasting shielding tool for electrodes of cast resin insulating basins according to claim 2, characterized in that: The end cover (22) is entirely composed of the first wear-resistant material portion.

4. The sandblasting shielding tool for electrodes of cast resin insulating basins according to claim 2, characterized in that: The second shielding member (30) comprises: a base (31), the base (31) comprising the second wear-resistant material portion (33) facing the electrode (10); and A shaft (37) is fixed at the center of the side of the base (31) away from the electrode (10) and is used to be connected to the rotating shaft of the sandblasting machine to drive the sandblasting masking tool to rotate under the drive of the rotating shaft.

5. The sandblasting shielding tool for electrodes of cast resin insulating basins according to claim 4, characterized in that: An annular boss (32) is provided on one side of the base (31) facing the electrode (10), and the second wear-resistant material portion (33) is detachably nested on the outer periphery of the annular boss (32).

6. The sandblasting shielding tool for electrodes of cast resin insulating basins according to claim 4, characterized in that: The base (31) is entirely composed of the second wear-resistant material portion.

7. The sandblasting masking tool for electrodes of cast resin insulating basins according to any one of claims 1 to 6, characterized in that: The first wear-resistant material portion (23) includes a first seal (S1) provided on the first joint surface (24) to seal the gap between the first joint surface (24) and the first surface (12) in an assembled state; and The second wear-resistant material portion (33) includes a second sealing member (S2) provided on the second joint surface (34) to seal the gap between the second joint surface (34) and the second surface (14) in an assembled state. The size and shape of the first seal (S1) are adapted to the size and shape of the shielded area of ​​the first surface (12); and the size and shape of the second seal (S2) are adapted to the size and shape of the shielded area of ​​the second surface (14).

8. The sandblasting and shielding tool for electrodes of cast resin insulating basins according to claim 4, characterized in that: The first shielding member (20) and the second shielding member (30) are respectively connected to the first surface (12) and the second surface (14) of the electrode (10) by screw threads.

9. The sandblasting shielding tool for electrodes of cast resin insulating basins according to claim 8, characterized in that: A first threaded hole (16) is provided on the first surface (12) of the electrode (10), and a first stud is provided on a side of the end cover (22) facing the first surface (12), and the first surface (12) and the first joint surface (24) are brought into close contact and fixed to each other through the threaded connection between the first threaded hole (16) and the first stud; and A second threaded hole is provided on the second surface (14) of the electrode (10), and a second stud (36) is provided on the side of the base (31) facing the second surface (14). The second surface (14) and the second joint surface (34) are brought into close contact and fixed by the threaded connection between the second threaded hole and the second stud (36).

10. The sandblasting shielding tool for electrodes of cast resin insulating basins according to claim 4, characterized in that: The end cover (22) and the base (31) are both disc-shaped.

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