Shielding device

Abstract

The present invention provides a shielding device comprising: a first cylindrical body, a first mounting hole provided at a first end of the first cylindrical body, and a second mounting hole provided at a second end of the first cylindrical body; a first conductor provided in the first mounting hole; a second conductor provided in the second mounting hole, and a receiving hole for accommodating an electrode provided at an end of the second conductor remote from the first conductor; and a controller electrically connected to both the first and second conductors. The technical solution of this application effectively solves the problem in related arts of requiring shielding adjacent conductors or removing a discharge gap during high-voltage testing.

Description

Technical Field

[0001] The present invention relates to the technical field of shielding equipment, and in particular to a shielding device. Background Art

[0002] Electrical testing is a crucial step in the operation and maintenance of power equipment and an effective means of ensuring the safe operation of power systems. High-voltage testing, with a high voltage of over 1000kV, is a direct and rigorous test of insulation and is particularly sensitive in detecting defects.

[0003] In high-voltage testing, due to the high test voltage, a high distance is required between the test object and the surrounding conductors and the ground. To ensure sufficient distance, test personnel often need to do a lot of work, such as removing or adjusting the protective gap to increase its distance to the ground to meet the test voltage requirements; removing the primary lead of the capacitor voltage transformer (CVT) and pulling it apart to ensure that the lead is at a sufficient distance from the CVT primary terminal board to meet the test voltage requirements, etc.

[0004] The areas that need to be removed, such as protective gaps and primary leads, are often quite high, ranging from 4 to 8 meters depending on the voltage level. The workspace is small and often requires high temperatures, making it quite challenging. Dismantling wiring requires climbing ladders or using aerial platforms, which carries the risk of falling from height, is time-consuming, and requires significant labor and material resources. Summary of the Invention

[0005] The main purpose of the present invention is to provide a shielding device to solve the problem in the related art that adjacent conductors need to be shielded or the discharge gap needs to be removed when performing a high voltage test.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a shielding device is provided, comprising: a first cylinder, a first end of the first cylinder is provided with a first mounting through hole, and a second end of the first cylinder is provided with a second mounting through hole; a first conductor is provided in the first mounting through hole; a second conductor is provided in the second mounting through hole, and an end of the second conductor away from the first conductor is provided with a accommodating hole for accommodating an electrode; and a controller, the controller being electrically connected to both the first conductor and the second conductor.

[0007] Furthermore, the shielding device further includes a second cylinder, which is nested with the first cylinder, and the second cylinder and the first cylinder can move relative to each other along the axis direction of the first cylinder.

[0008] Furthermore, the shielding device further includes a third cylinder, which is nested with the second cylinder, and the third cylinder and the second cylinder can move relative to each other along the axis direction of the first cylinder.

[0009] Furthermore, the shielding device further includes a first rubber ring, which is arranged on the outer wall of the first cylinder or the inner wall of the second cylinder and is located between the first cylinder and the second cylinder.

[0010] Furthermore, a first stop ring is provided on the outer wall of the first cylinder, a groove is provided on the outer side wall of the first stop ring, the first rubber ring is provided in the groove, and a second stop ring is provided on the inner wall of the second cylinder, and the first stop ring cooperates with the second stop ring.

[0011] Furthermore, the shielding device further includes a second rubber ring, which is arranged on the outer wall of the second cylinder or the inner wall of the third cylinder and is located between the second cylinder and the third cylinder.

[0012] Furthermore, the shielding device also includes a shielding sleeve, which is arranged on the outside of the first cylinder, the second cylinder and the third cylinder. The first end of the shielding sleeve is connected to the first cylinder, and the second end of the shielding sleeve is connected to the third cylinder. The shielding sleeve is telescopically arranged.

[0013] Furthermore, the shielding device also includes a connecting joint connected to the third cylinder, and an open slot is provided on the connecting joint, and a notch of the open slot is communicated with the outside of the connecting joint.

[0014] Furthermore, the connecting joint includes a connecting seat and a connecting plate, the connecting seat is connected between the third cylinder and the connecting plate, and the opening groove is provided at an end of the connecting plate away from the connecting seat.

[0015] Furthermore, the shielding device also includes a mounting ring, which is sleeved on the outer circumference of the third cylinder, and the connecting seat is arranged on the mounting ring.

[0016] According to the technical solution of the present invention, a shielding device includes a first cylindrical body, a first conductor, a second conductor, and a controller. The first cylindrical body is provided with a first mounting hole and a second mounting hole. The first mounting hole is located at the first end of the first cylindrical body, and the second mounting hole is located at the second end of the first cylindrical body. The first conductor is disposed within the first mounting hole, and the second conductor is disposed within the second mounting hole. A receiving hole is provided at the end of the second conductor remote from the first conductor, capable of accommodating an electrode. The controller is electrically connected to both the first and second conductors. Through the above arrangement, the first mounting hole can accommodate the first conductor, and the second mounting hole can accommodate the second conductor. The receiving hole can accommodate the electrode. When current flows between the first and second conductors, the controller can detect the current flow and transmit a current presence signal to an external terminal, facilitating operator processing. The first cylindrical body separates the electrode from the protective gap grounding electrode, eliminating the need to shield adjacent conductors or remove the discharge gap during high-voltage testing, as is common in the prior art. Therefore, the technical solution of the present application effectively solves the problem of shielding adjacent conductors or removing the discharge gap during high-voltage testing in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of a shielding device according to the present invention is shown;

[0019] Figure 2 Shown Figure 1 A cross-sectional view of a first position of the shielding device;

[0020] Figure 3 Shown Figure 1 A cross-sectional view of a second position of the shielding device;

[0021] Figure 4 Shown Figure 1 Schematic diagram of the exploded structure of the shielding device;

[0022] Figure 5 Shown Figure 1 A schematic diagram of a three-dimensional structure when the shielding device is connected to the electrode;

[0023] Figure 6 Shown Figure 1 Schematic diagram of the three-dimensional structure of the connection joint of the shielding device.

[0024] The above drawings include the following reference numerals:

[0025] 1. Electrode; 2. Protective gap grounding electrode; 10. First cylinder; 11. First mounting through hole; 12. Second mounting through hole; 13. First stop ring; 131. Groove; 20. First conductor; 30. Second conductor; 31. Accommodating hole; 40. Controller; 50. Second cylinder; 51. Second stop ring; 60. Third cylinder; 70. First rubber ring; 80. Second rubber ring; 90. Shielding sleeve; 100. Connecting joint; 101. Opening groove; 102. Connecting seat; 103. Connecting plate; 110. Mounting ring. DETAILED DESCRIPTION

[0026] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, 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 invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] 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 application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments can have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0029] Disadvantages of existing technology:

[0030] ① When testing the neutral point arrester, the connection between the neutral point arrester and the discharge gap should be removed before the pressure test, and then restored after the test is completed. The disassembly and assembly work is labor-intensive and time-consuming.

[0031] ② The neutral point lightning arrester is generally installed at a high position, about 4-7 meters. When removing the wires, it is necessary to work at height, climb escalators or use aerial work vehicles, etc. There is a greater risk of falling from height, and it is time-consuming and consumes a lot of manpower and material resources.

[0032] ③ When testing the high-voltage side bushing of the transformer, it is necessary to remove the primary lead of the bushing, pull the lead away from the pressurized part with insulating tape, fix it, and maintain a sufficiently safe distance. The operation process is cumbersome and consumes a large amount of insulating tape.

[0033] ④ When testing the bushing on the low-voltage side (10kV) of a transformer, the flexible connection between the bushing and the hard copper busbar or the tube mother must be disconnected and secured to maintain a sufficient safety distance, or the entire flexible connection can be removed to maintain a sufficient safety distance. Disconnection is labor-intensive and time-consuming.

[0034] The shielding device of this embodiment can solve the above problems. The shielding device of this embodiment is used in a high-voltage test process to shield the conductor to increase the effective insulation distance. It is quick and convenient and avoids climbing high to remove the wires.

[0035] like Figure 1 and Figure 2 As shown, the shielding device of this embodiment includes: a first cylindrical body 10, a first conductor 20, a second conductor 30, and a controller 40. A first mounting hole 11 is provided at the first end of the first cylindrical body 10, and a second mounting hole 12 is provided at the second end of the first cylindrical body 10. The first conductor 20 is disposed in the first mounting hole 11. The second conductor 30 is disposed in the second mounting hole 12, and an accommodating hole 31 for accommodating an electrode is provided at the end of the second conductor 30 away from the first conductor 20. The controller 40 is electrically connected to both the first conductor 20 and the second conductor 30.

[0036] Applying the technical solution of this embodiment, the shielding device includes a first cylindrical body 10, a first conductor 20, a second conductor 30, and a controller 40. The first cylindrical body 10 is provided with a first mounting hole 11 and a second mounting hole 12. The first mounting hole 11 is located at the first end of the first cylindrical body 10, and the second mounting hole 12 is located at the second end of the first cylindrical body 10. The first conductor 20 is disposed within the first mounting hole 11, and the second conductor 30 is disposed within the second mounting hole 12. A receiving hole 31 is provided at the end of the second conductor 30 distal from the first conductor 20. The receiving hole 31 is capable of accommodating the electrode 1. The controller 40 is electrically connected to both the first conductor 20 and the second conductor 30. Through the above arrangement, the first mounting hole 11 can accommodate the first conductor 20, and the second mounting hole 12 can accommodate the second conductor 30. The receiving hole 31 can accommodate the electrode 1. When current flows between the first conductor 20 and the second conductor 30, the controller 40 can detect the current flow and transmit a current presence signal to an external terminal for easy processing by the operator. The first cylinder 10 can separate the electrode 1 and the guard gap grounding electrode 2, thus avoiding the need to shield adjacent conductors or remove the discharge gap during high-voltage testing in the prior art. Therefore, the technical solution of this embodiment effectively solves the problem of needing to shield adjacent conductors or remove the discharge gap during high-voltage testing in the related art.

[0037] Electrode 1 is a shielded conductor.

[0038] like Figure 2 and Figure 4As shown, in this embodiment, the shielding device further includes a second cylinder 50, which is nested with the first cylinder 10 and can move relative to the first cylinder 10 along the axis of the first cylinder 10. This allows the shielding device to have a longer length, that is, when the shielding device is in use, the relative position between the first cylinder 10 and the second cylinder 50 can be adjusted to change the length of the shielding device.

[0039] like Figure 2 and Figure 3 As shown, in this embodiment, the shielding device further includes a third cylinder 60, which is nested with the second cylinder 50 and can move relative to the second cylinder 50 along the axis of the first cylinder 10. This allows the shielding device to have a longer length, that is, when the shielding device is in use, the relative positions of the first cylinder 10, the second cylinder 50, and the third cylinder 60 can be adjusted to change the length of the shielding device.

[0040] like Figure 2 and Figure 3 As shown, in this embodiment, the shielding device further includes a first rubber ring 70, which is disposed on the outer wall of the first cylinder 10 or the inner wall of the second cylinder 50 and is located between the first cylinder 10 and the second cylinder 50. By providing the first rubber ring 70, the gap between the first cylinder 10 and the second cylinder 50 can be filled, thereby increasing the insulation strength of the shielding device.

[0041] like Figure 2 and Figure 4 As shown, in this embodiment, a first stop ring 13 is provided on the outer wall of the first cylinder 10, and a groove 131 is provided on the outer wall of the first stop ring 13. The first rubber ring 70 is disposed in the groove 131. A second stop ring 51 is provided on the inner wall of the second cylinder 50, and the first stop ring 13 and the second stop ring 51 are engaged with each other. By providing the first stop ring 13 and the second stop ring 51, the relative position between the first cylinder 10 and the second cylinder 50 can be limited, preventing the first cylinder 10 and the second cylinder 50 from separating when the relative position of the first cylinder 10 and the second cylinder 50 is adjusted. The groove 131 can accommodate the first rubber ring 70, making the relative position of the first rubber ring 70 and the first cylinder 10 more stable.

[0042] A third stop ring is provided on the outer wall of the second cylinder 50 , and a fourth stop ring is provided on the inner wall of the third cylinder 60 .

[0043] The third stop ring and the fourth stop ring are engaged with each other.

[0044] like Figure 2 and Figure 4As shown, in this embodiment, the shielding device further includes a second rubber ring 80, which is disposed on the outer wall of the second cylinder 50 or the inner wall of the third cylinder 60 and is located between the second cylinder 50 and the third cylinder 60. By providing the second rubber ring 80, the gap between the second cylinder 50 and the third cylinder 60 can be filled, thereby increasing the insulation strength of the shielding device.

[0045] The third stop ring is also provided with a groove for accommodating the second rubber ring 80, so that the relative position of the second rubber ring 80 and the first cylinder 10 is more stable.

[0046] like Figure 3 and Figure 4 As shown, in this embodiment, the shielding device further includes a shielding sleeve 90, which is mounted on the outside of the first cylindrical body 10, the second cylindrical body 50, and the third cylindrical body 60. The first end of the shielding sleeve 90 is connected to the first cylindrical body 10, and the second end of the shielding sleeve 90 is connected to the third cylindrical body 60. The shielding sleeve 90 is retractable. The shielding sleeve 90 can effectively isolate the air, making the shielding device less susceptible to penetration.

[0047] A mounting ring is further provided at the first end of the first cylinder 10 , and the shielding sleeve 90 is connected to the mounting ring.

[0048] The shielding sleeve is corrugated.

[0049] like Figure 2 and Figure 3 As shown, in this embodiment, the shielding device further includes a connecting joint 100 connected to the third cylindrical body 60. The connecting joint 100 is provided with an open slot 101, the notch of the open slot 101 communicating with the exterior of the connecting joint 100. The provision of the connecting joint 100 facilitates connection of the shielding device to an external support structure. The provision of the open slot 101 facilitates insertion of a bolt into the connecting joint 100, thereby connecting the connecting joint 100 to the external support structure.

[0050] The external supporting structure is a telescopic insulating rod.

[0051] like Figure 3 、 Figure 4 as well as Figure 6As shown, in this embodiment, the connecting joint 100 includes a connecting seat 102 and a connecting plate 103. The connecting seat 102 is connected between the third cylinder 60 and the connecting plate 103, and the open groove 101 is provided at one end of the connecting plate 103 away from the connecting seat 102. The connecting plate 103 can be connected to the third cylinder 60 through the connecting seat 102, so that the relative position between the connecting joint 100 and the third cylinder 60 is more stable, and it is convenient for the external support structure to drive the connecting plate 103 to move, and then the connecting plate 103 can drive the connecting seat 102 to move, and then the connecting seat 102 can drive the third cylinder 60 to move, so that the relative position between the third cylinder 60 and the first cylinder 10 and the second cylinder 50 can be adjusted.

[0052] The connecting base 102 includes a first connecting block and a second connecting block, wherein the second connecting block and the first connecting block are arranged in a T-shape and are arranged perpendicular to the first connecting block.

[0053] The second connecting block is provided with a mounting groove, the connecting plate 103 is inserted into the mounting groove, and the connecting plate and the second connecting block are connected by bolts.

[0054] like Figure 2 and Figure 3 As shown, in this embodiment, the shielding device further includes a mounting ring 110, which is sleeved on the outer circumference of the third cylinder 60, and the connecting seat 102 is provided on the mounting ring 110. The mounting ring 110 facilitates the connection between the connecting seat 102 and the third cylinder 60.

[0055] The first connection block is connected to the mounting ring 110 by screws.

[0056] The mounting ring 110 is sleeved on the outer circumference of the shielding sleeve 90 , so that the connection between the shielding sleeve 90 and the third cylinder 60 is more stable.

[0057] A fifth stop ring is provided at one end of the third cylinder 60 away from the first cylinder 10 , and the fifth stop ring cooperates with the mounting ring 110 for stopping.

[0058] The shielding device of this embodiment is a high-altitude insulation shielding device with leakage current monitoring, which is used in high-voltage testing. The shielding conductor increases the effective insulation distance, is quick and convenient, and avoids climbing to remove wires or some cumbersome traction and fixing measures.

[0059] The shielding device of this embodiment mainly consists of four parts: an outer telescopic insulating shielding protective sleeve, an inner three-stage telescopic insulating shielding cover, a connecting and fixing module, and a leakage current monitoring unit.

[0060] The shielding sleeve 90 is an externally retractable insulating shielding protective sleeve. Made of epoxy resin, a material with excellent insulating properties, the shielding sleeve is integrally cast with the first cylindrical body 10 to form a seamless protective sleeve. It exhibits excellent toughness and is freely foldable and retractable. Its minimum retracted length is no more than 10 cm, and its maximum extended length is no less than 30 cm, ensuring it meets insulation length requirements in various situations. The open end of the externally retractable insulating shielding protective sleeve is seamlessly connected to the inner third cylindrical body.

[0061] When the shielding sleeve 90 is in the folded state, the length of the shielding sleeve is greater than 0 and less than or equal to 10 centimeters.

[0062] When the shielding sleeve 90 is in the unfolded state, the length of the shielding sleeve is greater than or equal to 30 centimeters, and the length of the shielding sleeve is less than or equal to 100 centimeters.

[0063] The inner three-stage telescopic insulating shielding cover is composed of a first cylinder 10 , a second cylinder 50 and a third cylinder 60 .

[0064] The first barrel 10 , the second barrel 50 and the third barrel 60 are coaxially arranged, and their diameters gradually increase. The second barrel 50 covers the first barrel 10 , and the third barrel 60 covers the second barrel 50 .

[0065] The first cylinder 10, the second cylinder 50 and the third cylinder 60 can all move in the axial direction and can be stretched into multiple layers or completely overlapped into one layer.

[0066] A first rubber ring 70 is provided between the first cylinder 10 and the second cylinder 50, and a second rubber ring 80 is provided between the second cylinder 50 and the third cylinder 60. This can reduce the gap between the first cylinder 10 and the second cylinder 50 and the second cylinder 50 and the third cylinder 60, thereby increasing the insulation strength.

[0067] The first cylinder 10 , the second cylinder 50 and the third cylinder 60 are made of insulating material with relatively high hardness, and have a supporting function, enabling the shielding device to stretch out without sagging.

[0068] The first cylinder 10 , the second cylinder 50 and the third cylinder 60 have relatively high hardness, and they have both insulating and shielding functions and supporting functions.

[0069] The shielding sleeve 90 is an integrated seamless shielding cover that can effectively isolate the air, making the shielding device less likely to be penetrated. The first cylinder 10, the second cylinder 50, the third cylinder 60 and the shielding sleeve 90 enhance the shielding effect, allowing a shorter shielding device to withstand higher voltages.

[0070] The connection and fixing module is composed of a connection joint 100 and a mounting ring 110. The connection joint 100 is used for connecting a telescopic insulating rod commonly used in electrical testing operations.

[0071] The mounting ring 110 securely connects the third cylinder 60 and the shielding sleeve 90 to the connecting plate 103 , and the connecting plate 103 is securely connected to the telescopic insulating rod via hand screws.

[0072] The surface of the connecting plate 103 has a plurality of bumps, which can increase resistance and fix the shielding device on the telescopic insulating rod.

[0073] The connecting plate 103 is provided with a circle with a notch, namely an open slot 101. The design of the open slot 101 allows the connection between the shielding device and the telescopic insulating rod to be quickly removed by loosening the screws. There is no need to unscrew all the screws to remove the shielding device, thereby improving efficiency.

[0074] like Figure 5 As shown, the monitoring unit consists of a first conductor 20 and a second conductor 30. Placed inside the insulating shield, the monitoring unit contacts the protective gap grounding electrode 2 or the shielded conductor. Powered by a rechargeable lithium battery, it monitors the leakage current flowing through the protective gap grounding electrode or the shielded conductor. The unit then collects, processes, and transmits the data to a mobile phone (GDDWZJPP). The tester can read the leakage current in real time via their phone, eliminating this interference factor during the test. Furthermore, the magnitude of the leakage current can be used to preliminarily assess the shielding effectiveness of the shield and determine whether further stretching is necessary.

[0075] The controller includes a data acquisition module and a data transmission module.

[0076] The data acquisition module mainly collects leakage current and processes it into digital quantity that can be output wirelessly through filtering, GDDWZJ / D conversion and data control.

[0077] The data acquisition module uses a small electrode for microcurrent acquisition, which occupies the smallest volume. The data acquisition module has a measurement range of 0-1999 microamperes, a measurement accuracy of >99.5%, and occupies a volume of <15,000 cubic millimeters.

[0078] The data transmission module chooses Bluetooth transmission, which has a shorter average transmission time, a transmission accuracy rate of ≥99%, a timeliness of <1s, and an energy consumption of less than 70mGDDWZJH.

[0079] The shielding device of this embodiment can be used alone. It can be put on the shielded conductor (terminal block) to insulate the conductor from the electrical equipment, making it easier to perform high-voltage tests. For example, when removing the wires during a CVT test, this device can be put on the electrode to eliminate the need to pull the wires apart.

[0080] The shielding device of this embodiment can also be used in conjunction with a telescopic insulating rod. By installing it on the telescopic insulating rod, the device can be raised by raising the telescopic insulating rod to shield high-altitude equipment. After being raised, it can be put on the protective gap to avoid dismantling the protective gap during high-voltage operations, thereby improving test efficiency and reducing operational risks.

[0081] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0082] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0083] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0084] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

[0085] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0086] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0087] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0088] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A shielding device, characterized in that: include: A first cylindrical body (10), wherein a first mounting through hole (11) is provided at a first end of the first cylindrical body (10), and a second mounting through hole (12) is provided at a second end of the first cylindrical body (10); A first conductor (20) is disposed in the first mounting through hole (11); A second conductor (30) is disposed in the second mounting through hole (12), and an end of the second conductor (30) away from the first conductor (20) is provided with an accommodating hole (31) for accommodating an electrode; A controller (40) is electrically connected to both the first conductor (20) and the second conductor (30).

2. The shielding device according to claim 1, characterized in that The shielding device further comprises a second cylinder (50), the second cylinder (50) being nested with the first cylinder (10), and the second cylinder (50) and the first cylinder (10) being relatively movable along the axial direction of the first cylinder (10).

3. The shielding device according to claim 2, characterized in that The shielding device further comprises a third cylinder (60), wherein the third cylinder (60) is nested with the second cylinder (50), and the third cylinder (60) and the second cylinder (50) are relatively movable along the axial direction of the first cylinder (10).

4. The shielding device according to claim 3, characterized in that The shielding device further comprises a first rubber ring (70), which is arranged on the outer wall of the first cylinder (10) or the inner wall of the second cylinder (50) and is located between the first cylinder (10) and the second cylinder (50).

5. The shielding device according to claim 4, characterized in that A first stop ring (13) is provided on the outer wall of the first cylinder (10), a groove (131) is provided on the outer wall of the first stop ring (13), the first rubber ring (70) is arranged in the groove (131), and a second stop ring (51) is provided on the inner wall of the second cylinder (50), and the first stop ring (13) and the second stop ring (51) are engaged in a stop manner.

6. The shielding device according to any one of claims 3 to 5, characterized in that: The shielding device further comprises a second rubber ring (80), which is arranged on the outer wall of the second cylinder (50) or on the inner wall of the third cylinder (60) and is located between the second cylinder (50) and the third cylinder (60).

7. The shielding device according to any one of claims 3 to 5, characterized in that: The shielding device also includes a shielding sleeve (90), which is sleeved on the outside of the first cylinder (10), the second cylinder (50) and the third cylinder (60), the first end of the shielding sleeve (90) is connected to the first cylinder (10), and the second end of the shielding sleeve (90) is connected to the third cylinder (60), and the shielding sleeve (90) is telescopically arranged.

8. The shielding device according to any one of claims 3 to 5, characterized in that: The shielding device further comprises a connecting joint (100) connected to the third cylinder (60), wherein the connecting joint (100) is provided with an open slot (101), and a notch of the open slot (101) is in communication with the outside of the connecting joint (100).

9. The shielding device according to claim 8, characterized in that The connecting joint (100) comprises a connecting seat (102) and a connecting plate (103), wherein the connecting seat (102) is connected between the third cylinder (60) and the connecting plate (103), and the opening groove (101) is provided at one end of the connecting plate (103) away from the connecting seat (102).

10. The shielding device according to claim 9, characterized in that The shielding device further comprises a mounting ring (110), wherein the mounting ring (110) is sleeved on the outer circumference of the third cylinder (60), and the connecting seat (102) is arranged on the mounting ring (110).

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