Shielding ball opening and scribing device

Abstract

The present application relates to a kind of shielding ball opening scribing device, the device includes positioning member, scribing rod and connecting piece between the two, positioning member has the positioning part for being positioned on shielding ball to determine the circle center to be scribed, connecting piece is used to determine the radius of the circle to be scribed, scribing rod is used to rotate around positioning member, to scribe circle on the spherical surface of shielding ball, the end of scribing rod is provided with scribing structure for scribing on the spherical surface of shielding ball.The present application effectively solves the problem that there is no more accurate and convenient scribing device in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to a shielding ball opening marking device, and belongs to the technical field of opening marking devices. BACKGROUND

[0002] The shielding ball is a commonly used shielding device in the extra-high voltage converter station, and with the successive construction of the converter station project and the gradual increase of the voltage level in recent years, its application in the converter station is also more and more widely. The tube bus in the converter station needs to be connected by the fittings, but due to the serious corona phenomenon at the fitting connection, and the corona phenomenon will cause heat accumulation, which will also cause a series of adverse effects, so the shielding ball needs to be set at the fitting connection to prevent the corona phenomenon.

[0003] When the shielding ball is set at the fitting connection, the same number of holes as the number of tube buses to be connected needs to be opened on the shielding ball, so as to allow each tube bus to pass into the shielding ball and be connected by the fittings in the shielding ball. When the specific position of the opening on the shielding ball is determined, for some horizontal or vertical tube buses, domestic fitting manufacturers can directly open holes on the shielding ball in the horizontal or vertical direction during the production and manufacturing process, but usually due to the complex equipment arrangement in the converter station, the various connection forms of the tube bus, and the uncertainty of the running direction, the specific opening position on the shielding ball also has uncertainty, so the opening of the shielding ball needs to be constructed on site according to the actual position of the tube bus to accurately determine the specific opening position on the shielding ball. Among them, the specific positioning method of the opening position on the shielding ball is disclosed in the shielding ball opening position positioning method of the Chinese patent application for invention with the application publication number CN106403753A.

[0004] After the specific position of the opening on the shielding ball is determined, the size of the corresponding tube bus needs to be determined, and a circle of the corresponding size is drawn on the shielding ball with the center point of the opening position as the center, and then a hole is cut by using a curved saw or other tools. However, since there is no relatively accurate and convenient marking device for on-site opening in the prior art, the purpose of the present application is to provide an opening marking device that can improve the accuracy of marking during opening and facilitate marking during opening. SUMMARY

[0005] The purpose of the present application is to provide a shielding ball opening marking device to solve the problem that there is no relatively accurate and convenient marking device in the prior art.

[0006] To achieve the above-mentioned purpose, the shielding ball opening marking device in the present application adopts the following technical scheme:

[0007] A shielding ball opening scribing device comprises a positioning member, a scribing rod and a connecting member connected between the two, the positioning member has a positioning part for positioning on a shielding ball to determine the center of a circle to be scribed, the connecting member is used to determine the radius of the circle to be scribed, and the scribing rod is used to rotate around the positioning member to scribe a circle on the surface of the shielding ball, and the end of the scribing rod is provided with a scribing structure for scribing on the surface of the shielding ball.

[0008] The shielding ball opening scribing device has the advantages that: the positioning part on the positioning rod is used to position on the shielding ball, so that the center of the circle to be scribed can be determined by the positioning of the positioning part on the shielding ball when scribing a circle on the shielding ball; the scribing rod is used to rotate around the positioning member, and the end of the scribing rod is provided with a scribing structure for scribing on the surface of the shielding ball; the connecting member is connected between the scribing rod and the positioning member, and the radius of the circle to be scribed can be determined through the connecting member; therefore, after the center of the circle to be scribed on the shielding ball is determined, the scribing rod is rotated around the positioning member, and the scribing structure at the end of the scribing rod is used to scribe on the surface of the shielding ball, so as to realize accurate scribing on the surface of the shielding ball; in summary, the shielding ball opening scribing device can form a compass structure through the positioning member, the connecting member and the scribing rod, so that the scribing on the shielding ball is facilitated, and the accuracy of scribing on the shielding ball is ensured, which is beneficial to ensuring the quality of the opening on the shielding ball to a certain extent.

[0009] Further, the connecting member is provided with a guide structure extending along the length direction thereof, the scribing rod is slidingly installed on the connecting member through the guide structure, and at least one of the scribing rod and the connecting member is provided with a fixing structure for fixing the scribing rod and the connecting member after the scribing rod slides to a set position.

[0010] The advantages of the above technical solution are that: the connecting position between the scribing rod and the connecting member can be adjusted according to the size of the radius of the circle to be scribed through the guide structure, so as to meet different opening requirements, which is beneficial to increasing the practicability of the shielding ball opening scribing device; the position between the connecting member and the scribing rod after position adjustment can be prevented from changing through the fixing structure, the fixed connection strength between the connecting member and the scribing rod is ensured, and then the scribing quality is ensured.

[0011] Further, the connecting member is provided with a long perforation extending along the length direction thereof, the long perforation is used for the scribing rod to pass through and is used to form the guide structure.

[0012] The advantages of the above technical solution are that: the long perforation simplifies the specific structure of the guide structure and facilitates the processing and manufacturing of the guide structure on the connecting member.

[0013] Further, the fixing structure comprises an adjusting screw segment arranged on the scribing rod and two adjusting nuts threadedly assembled on the adjusting screw segment, and the two adjusting nuts are arranged on two sides of the connecting piece and used for clamping the connecting piece when being screwed towards the connecting piece, so as to realize the fixed connection of the connecting piece and the scribing rod.

[0014] The technical scheme has the beneficial effects that: through the fixing structure composed of the adjusting screw segment and the two adjusting nuts, the fixed connection strength between the connecting piece and the scribing rod can be ensured, and the fixing structure is also facilitated to be arranged to a certain extent, and through the adjusting screw segment and the two adjusting nuts, the scribing rod is facilitated to be driven to move in the axial direction, so that the distance between the scribing structure and the outer spherical surface of the shielding ball is facilitated to be adjusted, and the effective contact between the scribing structure and the spherical surface of the shielding ball is ensured.

[0015] Further, the connecting piece is provided with at least two, and each connecting piece is arranged in parallel and at intervals.

[0016] The technical scheme has the beneficial effects that: through the at least two connecting pieces, the swing of the scribing rod relative to the positioning piece can be avoided to a certain extent, the stability of the scribing rod installation can be further ensured, and the scribing quality can be further improved.

[0017] Further, the positioning piece is a positioning rod, the positioning rod is provided with a penetrating segment for penetrating into the shielding ball, and is also provided with a stop surface for stop cooperation with the outer spherical surface of the shielding ball after the penetrating segment penetrates into the shielding ball, and the penetrating segment constitutes the positioning part.

[0018] The technical scheme has the beneficial effects that: through the penetrating segment and the stop surface, the stability of the positioning rod installation on the shielding ball can be ensured, and the stability of the positioning part positioning on the shielding ball can be ensured, and the scribing quality can be further ensured.

[0019] Further, the penetrating segment is a positioning screw segment, and a stop nut is threadedly assembled on the penetrating segment, and the stop nut is used for stop cooperation with the inner spherical surface of the shielding ball, so as to prevent the penetrating segment from being taken out of the shielding ball.

[0020] The technical scheme has the beneficial effects that: through the stop cooperation between the stop nut and the inner spherical surface of the shielding ball, the penetrating segment can be prevented from being taken out of the shielding ball, and the stability of the positioning part positioning on the shielding ball and the stability of the positioning rod installation on the shielding ball are further ensured.

[0021] Further, the positioning rod is also provided with an annular boss arranged close to the penetrating segment, and an end face of the annular boss arranged close to the penetrating segment constitutes the stop surface.

[0022] The beneficial effects of the above technical solutions are that the setting of the annular boss simplifies the setting of the stop surface on the positioning rod, facilitates the machining and manufacturing of the stop surface, and also facilitates the installation of the positioning rod on the shielding ball because only the position of the stop nut on the penetrating section needs to be adjusted.

[0023] Further, the end face of the annular boss arranged away from the penetrating section is used for stop cooperation with the connecting piece, the positioning rod is provided with a fixed screw section arranged on the side of the annular boss away from the penetrating section, a fixed nut is threadedly assembled on the fixed screw section, and the fixed nut and the annular boss are used for being arranged on both sides of the connecting piece and clamping the connecting piece when being screwed towards the connecting piece, so as to realize the fixed connection of the connecting piece and the positioning rod.

[0024] The beneficial effects of the above technical solutions are that the end face of the annular boss is cooperated with the stop of the connecting piece, and the fixed nut clamps and fixes the connecting piece, so as to facilitate the fixed connection between the connecting piece and the positioning rod.

[0025] Further, the scribing structure is a cutter head.

[0026] The beneficial effects of the above technical solutions are that through the cutter head, not only the scribing of the scribing structure on the shielding ball is facilitated, but also when the material constituting the shielding ball is relatively thin, the cutter head can cut the shielding ball, and the hole of the shielding ball is directly realized, and the hole machining on the shielding ball is further facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic view of the shielding ball hole scribing device in the present application;

[0028] Figure 2 is a schematic view of the positioning rod in the shielding ball hole scribing device of the present application;

[0029] Figure 3 is a schematic view of the connecting plate in the shielding ball hole scribing device of the present application;

[0030] Figure 4 is a schematic view of the scribing rod in the shielding ball hole scribing device of the present application;

[0031] Figure 5 is a schematic view of the cutter head in the shielding ball hole scribing device of the present application;

[0032] Figure 6 is a schematic view of the hand ball in the shielding ball hole scribing device of the present application;

[0033] Figure 7 is a use state view of the shielding ball hole scribing device in the present application.

[0034] In the figure: 10, shielding ball; 20, positioning rod; 21, penetrating section; 22, annular boss; 23, fixed screw section; 30, stop nut; 40, first fixed nut; 50, second fixed nut; 60, first connecting plate; 61, round hole; 62, long hole; 70, scribe rod; 71, adjusting screw section; 72, mounting plate; 73, second bolt hole; 80, cutter head; 81, first bolt hole; 90, adjusting nut; 100, hand ball; 110, second connecting plate. DETAILED DESCRIPTION

[0035] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application, i.e., the described embodiments are only some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application generally described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0036] Therefore, the detailed description of the embodiments of the present application provided below in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0037] It should be noted that in the specific embodiments of the present application, the relationship terms such as "first" and "second" and the like that may appear are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between the entities or operations. Moreover, the terms such as "include", "contain" or any other variants that may appear are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. The limiting elements that may appear, such as "including a", do not exclude the presence of other identical elements in the process, method, article or device including the elements, without more limitations.

[0038] In the description of the present application, unless explicitly defined and limited otherwise, the terms "mounting", "connecting", "connection" can be understood in a broad sense, for example, can be fixed connection, can be detachable connection, or integral connection; can be mechanical connection, can be electrical connection; can be direct connection, or indirect connection through intermediate medium, or can be internal connection of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In the description of the present application, unless explicitly defined and limited otherwise, the term "provided with" can be understood in a broad sense, for example, the object of "provided with" can be part of the body, or arranged separately from the body and connected to the body, which connection can be detachable or non-detachable. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] The present application is further described in detail below in combination with embodiments.

[0041] Embodiment 1 of the shielding ball opening and marking device in the present application:

[0042] In the present embodiment, the shielding ball opening and marking device is used to mark a circle on the spherical surface of the shielding ball 10 to open a circular hole on the shielding ball 10, and before using the shielding ball opening and marking device to mark a circle, the specific position of the circle to be marked has been determined on the shielding ball 10, and a positioning hole penetrating the shell of the shielding ball 10 is arranged at the center of the circle to be marked. As shown in Figure 1 The shielding ball opening and marking device comprises a positioning member, a marking rod 70 and a connecting member connected therebetween, and the positioning member, the marking rod 70 and the connecting member jointly constitute a compass structure.

[0043] As shown in Figure 2 The positioning member is a positioning rod 20, and the positioning rod 20 is provided with a fixed screw rod segment 23, an annular boss 22 and a penetrating segment 21 arranged in sequence along the axial direction thereof. Among them, the penetrating segment 21 is a positioning screw rod segment, and the penetrating segment 21 is used to penetrate into the shielding ball 10 through the positioning hole (as shown in Figure 7 to position on the shielding ball 10 and determine the center of the circle to be marked, and the penetrating segment 21 constitutes a positioning part for positioning on the shielding ball 10 to determine the center of the circle to be marked. As shown in Figure 1As shown, the stop nut 30 is also threadedly assembled on the penetrating segment 21, and specifically, when the penetrating segment 21 penetrates into the shielding ball 10, the stop nut 30 is separated from the annular boss 22 on both the inner and outer sides of the shielding ball 10, the stop nut 30 is in stop cooperation with the inner spherical surface of the shielding ball 10 to prevent the penetrating segment 21 from being pulled out of the shielding ball 10, and the end face of the annular boss 22 arranged close to the penetrating segment 21 is in stop cooperation with the outer spherical surface of the shielding ball 10 to limit the length of the positioning rod 20 penetrating into the shielding ball 10, and the end face of the annular boss 22 arranged close to the penetrating segment 21 constitutes a stop surface for stop cooperation with the outer spherical surface of the shielding ball 10.

[0044] As shown in Figure 1 and Figure 3 The connecting piece is a connecting plate, and two connecting plates are arranged in parallel and at intervals, and are respectively a first connecting plate 60 and a second connecting plate 110, and each of the two connecting plates is provided with a circular through hole 61 on the same side, and each circular through hole 61 is for the fixed screw segment 23 to pass through. Among them, the first connecting plate 60 is used for stop cooperation with the end face of the annular boss 22 arranged away from the penetrating segment 21, and the fixed screw segment 23 is also threadedly assembled with a first fixed nut 40, and the first fixed nut 40 and the annular boss 22 are separated on both sides of the first connecting plate 60, when the first fixed nut 40 is screwed towards the first connecting plate 60, the first fixed nut 40 will clamp the first connecting plate 60 together with the annular boss 22, to realize the fixed connection of the first connecting plate 60 and the positioning rod 20.

[0045] As shown in Figure 1 The fixed screw segment 23 is also threadedly assembled with two second fixed nuts 50 separated on both sides of the second connecting plate 110, and when the two second fixed nuts 50 are screwed towards the second connecting plate 110, the two second fixed nuts 50 will clamp the second connecting plate 110, to realize the fixed connection between the second connecting plate 110 and the positioning rod 20.

[0046] As shown in Figure 1 and Figure 7 The scribing rod 70 is used for rotating around the positioning piece to scribe a circle on the spherical surface of the shielding ball 10, and the end of the scribing rod 70 is provided with a scribing structure for scribing on the spherical surface of the shielding ball 10, and specifically, the scribing structure is a tool bit 80, the tool bit 80 is rhombic Figure 5 As shown, the tool bit 80 is provided with a first bolt through hole 81 for a bolt to pass through, and the end of the scribing rod 70 is provided with a mounting plate 72, and the mounting plate 72 is provided with a second bolt through hole 73 for a bolt to pass through, so that the tool bit 80 is fixedly connected to the mounting plate 72 through the bolt passing through the first bolt through hole 81 and the second bolt through hole 73. In addition, when the material constituting the shielding ball 10 is relatively thin or soft, the tool bit 80 can also cut the shielding ball 10 to directly realize the hole of the shielding ball 10.

[0047] As shown in Figure 4 , the scribing rod 70 is provided with an adjusting screw segment 71, as shown in Figure 3 , each connecting plate is further provided with a long hole 62 extending along the length direction of the connecting plate, the long hole 62 is arranged on the other side of the connecting plate relative to the circular hole 61, and each long hole 62 is for the adjusting screw segment 71 to pass through. The scribing rod 70 is guided and slidably installed on each connecting plate through the guiding and sliding fit between the adjusting screw segment 71 and the long hole 62, and through the guided and sliding installation of the scribing rod 70 on each connecting plate, the relative position between the scribing rod 70 and each connecting plate can be changed, and then the distance between the scribing rod 70 and the positioning rod 20 can also be changed, so that through the connecting piece, the different sizes of the radius of the different circles to be scribed can be determined according to the needs, and the circles with different sizes of the radius can be scribed on the spherical surface of the shielding ball 10.

[0048] As shown in Figure 1 , the adjusting screw segment 71 is further threadedly assembled with four adjusting nuts 90 respectively arranged on both sides of each connecting plate, each adjusting nut 90 is used to be screwed towards the corresponding connecting plate after the scribing rod 70 is slid to the set position, so as to clamp and fix the corresponding connecting plate, so as to realize the fixed connection between each connecting plate and the scribing rod 70, and each adjusting nut 90 and the adjusting screw segment 71 together constitute a fixing structure for fixing the scribing rod 70 and the connecting plate after the scribing rod 70 is slid to the set position. In addition, through the adjusting screw segment 71 and the adjusting nut 90, it is also convenient to drive the scribing rod 70 to move in the axial direction, and then it is convenient to adjust the distance between the cutter head 80 and the outer spherical surface of the shielding ball 10, so as to ensure the effective contact between the cutter head 80 and the outer spherical surface of the shielding ball 10. Each adjusting nut 90 and each fixing nut and the corresponding connecting plate are further provided with an elastic gasket.

[0049] As shown in Figure 1 and Figure 6 , the end of the adjusting screw segment 71 is further threadedly assembled with a hand ball 100 arranged away from the cutter head 80, the hand ball 100 is held by hand, so as to apply force to the scribing rod 70 to drive the scribing rod 70 to rotate around the positioning rod 20.

[0050] In addition, it should be noted that when the stop nut 30 and the annular boss 22 do not completely clamp the shielding ball and the fixing nut completely clamps the connecting piece, that is, the positioning rod 20 can rotate relative to the shielding ball 10, the connecting piece cannot rotate relative to the positioning rod 20, at this time, the scribing rod 70 can complete the circle drawing through the rotation of the positioning rod 20 relative to the shielding ball 10. When the stop nut 30 and the annular boss 22 completely clamp the shielding ball and the fixing nut do not completely clamp the connecting piece, that is, the positioning rod 20 cannot rotate relative to the shielding ball 10, but the connecting piece can rotate relative to the positioning rod 20, at this time, the scribing rod 70 can complete the circle drawing through the rotation of the connecting piece relative to the positioning rod 20.

[0051] The shielding ball opening and line marking device has the positioning part on the positioning rod for positioning on the shielding ball, so that the center of the circle to be marked can be determined by the positioning of the positioning part on the shielding ball when marking the circle on the shielding ball. The end of the marking rod is provided with the marking structure for marking the line on the spherical surface of the shielding ball. The connecting part is connected between the marking rod and the positioning part. The radius of the circle to be marked can be determined through the connecting part. When the center of the circle to be marked on the shielding ball is determined, the marking rod is rotated around the positioning part, and the marking structure at the end of the marking rod marks the line on the spherical surface of the shielding ball, so as to accurately mark the circle on the spherical surface of the shielding ball. The shielding ball opening and line marking device can form the compass structure through the positioning part, the connecting part and the marking rod, so as to facilitate the marking of the circle on the shielding ball and ensure the accuracy of the marking of the circle on the shielding ball, thereby ensuring the quality of the opening on the shielding ball to a certain extent.

[0052] In addition, it should be pointed out that the shielding ball opening and line marking device can not only mark the line on the spherical surface of the shielding ball, but also mark the line on a flat plate or other objects.

[0053] In other embodiments of the shielding ball opening and line marking device, the marking structure can not be a cutter head, but a pointed structure arranged at the end of the marking rod.

[0054] In other embodiments of the shielding ball opening and line marking device, the fixed connection between the connecting part and the positioning rod can be achieved by clamping of the fixing nut and the annular boss, and the fixing nut is arranged on both sides of the connecting part. In this case, the end face of the annular boss away from the penetrating section is not in abutting engagement with the connecting part.

[0055] In other embodiments of the shielding ball opening and line marking device, the connecting part is fixed on the positioning rod without clamping of the fixing nut, and a jacking bolt is threadedly assembled on the connecting part when the positioning rod penetrates through the connecting part. The fixed connection between the connecting part and the positioning rod is achieved by jacking the positioning rod with the jacking bolt. In other embodiments, a jacking bolt is threadedly assembled on the positioning rod when the connecting part penetrates through the positioning rod. The fixed connection between the connecting part and the positioning rod is achieved by jacking the connecting part with the jacking bolt.

[0056] In other embodiments of the shielding ball opening and line marking device, the connecting part and the positioning rod are directly fixed and connected through welding or other methods.

[0057] In other embodiments of the shielding ball opening and line marking device, the positioning rod is not provided with the annular boss, but is threadedly assembled with a positioning nut arranged close to the penetrating section, and the end face of the positioning nut arranged close to the penetrating section is used to form the abutting surface.

[0058] In other embodiments of the shielding ball opening and scribing device, the stop nut can not be provided, and instead, a pin located inside the shielding ball is inserted on the penetrating segment after the penetrating segment penetrates the shielding ball, and the pin and the inner spherical surface of the shielding ball are prevented from being separated by the stop cooperation, and in this case, the penetrating segment does not need to be provided as a positioning screw segment. In other embodiments, the positioning and installation on the shielding ball can be directly achieved by the penetrating segment penetrating the shielding ball, and in this case, the penetrating segment also does not need to be provided as a positioning screw segment.

[0059] In other embodiments of the shielding ball opening and scribing device, the penetrating segment can not be provided, and instead, a positioning tip is provided at the end of the positioning rod, and the positioning tip is abutted on the shielding ball to achieve positioning and determine the center of the circle to be scribed, and in this case, the positioning rod does not need to be provided with a stop surface.

[0060] In other embodiments of the shielding ball opening and scribing device, the connecting member can not be provided with two, but only one, and in other embodiments, three can also be provided.

[0061] In other embodiments of the shielding ball opening and scribing device, the fixing structure can not be composed of the adjusting screw segment and the adjusting nut, but instead, a clamping bolt is threadedly assembled on the connecting member, and the clamping bolt is clamped on the scribing rod to achieve the fixed connection between the connecting member and the scribing rod.

[0062] In other embodiments of the shielding ball opening and scribing device, the connecting member is not provided with a long through hole for the scribing rod to pass through, but instead, a through hole is provided on the scribing rod for the connecting member to pass through, and the relative position between the connecting member and the scribing rod is adjusted by the guiding and sliding cooperation between the connecting member and the through hole, and in this case, the connecting member itself constitutes a guiding structure, and at this time, the fixing structure can be composed of a clamping bolt threadedly assembled on the scribing rod, and the clamping of the clamping bolt on the connecting member can achieve the fixed connection between the connecting member and the scribing rod.

[0063] In other embodiments of the shielding ball opening and scribing device, the connecting member is provided with a dovetail groove extending along the length direction thereof, the positioning rod is provided with a protrusion adapted to the dovetail groove, the protrusion is guidingly and slidingly assembled in the dovetail groove, and the dovetail groove constitutes a guiding structure, and at this time, the fixing structure can be composed of a clamping bolt threadedly assembled on the connecting member, and the clamping of the clamping bolt on the scribing rod can achieve the fixed connection between the connecting member and the scribing rod.

[0064] In other embodiments of the shielding ball opening and scribing device, the connecting member and the scribing rod are directly fixedly connected by welding or other fixing methods.

[0065] The above merely describes preferred embodiments of the present application and is not used to limit the present application, and the patent protection scope of the present application is subject to the claims, and any equivalent structural changes made according to the content of the specification and drawings of the present application should also be included in the protection scope of the present application.

Claims

1. A device for marking and marking holes in a shielding ball, characterized in that, The device includes a positioning rod, a marking rod, and a connector connecting the two. The positioning rod has a positioning screw section for inserting into the shielding ball. An annular boss is arranged near the positioning screw section. The end face of the annular boss near the positioning screw section forms a stop surface that engages with the outer spherical surface of the shielding ball. The end face of the annular boss away from the positioning screw section is used for stop engagement with the connector. The positioning rod has a fixing screw section arranged on the side of the annular boss away from the positioning screw section. A fixing nut is threaded onto the fixing screw section. The fixing nut and the annular boss are positioned on opposite sides of the connector and are used to clamp the connector when screwed toward the connector, thus achieving a fixed connection between the connector and the positioning rod. A stop surface is threaded onto the positioning screw section for stop engagement with the inner spherical surface of the shielding ball. The stop nut and the positioning screw section constitute a positioning part for axial positioning on the shielding ball shell to determine the center of the circle to be scribed. When the stop nut and the stop surface are not fully clamped to the shielding ball shell, the positioning rod can drive the connecting piece to rotate relative to the shielding ball. When the stop nut and the stop surface are fully clamped to the shielding ball shell, the connecting piece can rotate relative to the positioning rod. The connecting piece is used to determine the radius of the circle to be scribed. The scriber rod is used to rotate around the axis of the positioning rod to scribe a circle on the outer spherical surface of the shielding ball. The end of the scriber rod is provided with a scriber structure for scriber on the spherical surface of the shielding ball. The scriber rod is fixedly connected to the connecting piece, and before the fixed connection, the scriber rod moves upward along its axis to adjust the distance between the scriber structure and the outer spherical surface of the shielding ball so that the scriber structure and the outer spherical surface of the shielding ball can effectively contact each other.

2. The shielding ball perforation marking device according to claim 1, characterized in that, The connector is provided with a guide structure extending along its own length direction. The marking rod is guided and slidably installed on the connector through the guide structure. At least one of the marking rod and the connector is provided with a fixing structure for fixing the marking rod and the connector after the marking rod slides to a set position.

3. The shielding ball perforation marking device according to claim 2, characterized in that, The connector has a long through hole extending along its own length, through which the marking rod passes and is used to form the guide structure.

4. The shielding ball perforation marking device according to claim 3, characterized in that, The fixing structure includes an adjusting screw section set on the scribing rod and two adjusting nuts threaded onto the adjusting screw section. The two adjusting nuts are placed on both sides of the connector and are used to clamp the connector when screwed toward the connector, so as to achieve a fixed connection between the connector and the scribing rod.

5. The shielding ball perforation marking device according to any one of claims 1 to 4, characterized in that, The connector is provided in at least two parts, and the connectors are arranged in parallel and spaced apart.

6. The shielding ball perforation marking device according to any one of claims 1 to 4, characterized in that, The scribing structure is a cutting head.

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