A high voltage test insulation shielding device

Abstract

The application relates to the technical field of high-pressure tests, in particular to a high-pressure test insulation shielding device which comprises an insulation cup, a fixing seat and a connecting structure, the insulation cup comprises a cup body part, a first opening end and a second opening end, the cup body part is arranged between the first opening end and the second opening end, the cup body part is a foldable structure, the fixing seat is arranged at the first opening end of the insulation cup, the fixing seat is provided with an adsorption structure, and the connecting structure is arranged at the second opening end of the insulation cup; the application can effectively maintain the effective insulation distance between two electrodes and improve the work efficiency of the high-pressure test.

Description

Technical Field

[0001] This invention relates to the field of high-voltage testing technology, and in particular to a high-voltage testing insulation shielding device. Background Technology

[0002] To prevent accidents from occurring in electrical equipment during operation, to promptly detect latent defects in the equipment, and to ensure the safe operation of the power system, high-voltage tests are required for electrical equipment.

[0003] Currently, during high-voltage testing, due to the high voltage, in order to maintain a sufficient effective insulation distance between the two electrodes for testing purposes, it is often necessary to remove the wires or protective gaps and use insulating tape to pull the wires away from the pressurized area and fix them. However, this operation makes the high-voltage testing process cumbersome and complicated, with a large workload and low efficiency. At the same time, it consumes a lot of insulating tape to maintain the safe distance, which is not only costly and time-consuming and laborious to disassemble and assemble, but also makes it difficult to maintain a stable effective insulation distance between the two electrodes. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, such as the cumbersome and complex operation of high-voltage testing and the difficulty in maintaining an effective insulation distance between the two electrodes, this invention provides a high-voltage testing insulation shielding device that can effectively maintain an effective insulation distance between the two electrodes and improve the working efficiency of high-voltage testing.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a high-voltage test insulation shielding device, comprising an insulating cup, a fixing base and a connecting structure, wherein the insulating cup comprises a cup body, a first open end and a second open end, the cup body is disposed between the first open end and the second open end, the cup body is a foldable structure, the fixing base is disposed at the first open end of the insulating cup, the fixing base is provided with an adsorption structure, and the connecting structure is disposed at the second open end of the insulating cup.

[0006] Furthermore, the mounting link includes a horizontal frame and a vertical rod, and the cup body includes several coaxial folded cylinders, which are slidably connected to each other, and the diameter of each folded cylinder decreases sequentially from the second opening end to the first opening end.

[0007] Furthermore, one end of the folding cylinder is provided with a limiting hole, and the other end of the folding cylinder is provided with a limiting flange. The limiting flanges of each folding cylinder are sequentially connected to the limiting holes of adjacent folding cylinders.

[0008] Furthermore, the fixing base is a disc structure, and each of the folded cylinders, after being folded into an integral structure, abuts against the fixing base.

[0009] Furthermore, an annular mounting base for installing the connecting structure is fitted onto the second open end.

[0010] Furthermore, the connection structure includes a connecting seat and a connecting ear, the connecting seat being connected to the annular mounting seat, the connecting ear being connected to the connecting seat, and the connecting ear having a notch.

[0011] Furthermore, the connecting seat has an arc-shaped structure and is provided with several connecting holes.

[0012] Furthermore, the connecting ear is provided with several limiting blocks.

[0013] Furthermore, the cup body is made of epoxy resin insulating material.

[0014] Furthermore, the adsorption structure is a strong, conductive magnet.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] This invention provides a high-voltage test insulation shielding device. During the high-voltage test, the insulating cup is initially in a fully folded state. A connecting structure connects the insulating cup to a retractable insulating rod (as in existing technology). The user holds the insulating rod and adjusts its extension length to insert the shielding device between the two electrodes of the protective gap. An adsorption device on the mounting base fixes the first open end of the insulating cup to the positive electrode. The insulating rod is then moved, pulling the connecting structure to move the second open end of the insulating cup away from the first open end. This causes the cup body to unfold sequentially, covering the entire electrode and forming an insulation barrier on the positive electrode, blocking the discharge breakdown path between the positive electrode and the plate electrode. The high-voltage test is then conducted. After the high-voltage test, when the shielding device needs to be retracted, the insulating rod is moved in the opposite direction, pulling the connecting structure to move the second open end of the insulating cup closer to the first open end, causing the cup body to fully fold. The insulating rod is then retracted, allowing the shielding device to disengage from the protective gap. Therefore, when using the shielding device of the present invention to conduct high-voltage tests, it is not necessary to remove its parallel protective gap, which simplifies the working steps, improves the working efficiency, and eliminates the need for high-altitude operations, thereby improving operational safety. At the same time, the insulating cup can be stably fitted on the electrode, solving the problem of poor fixing effect of the insulating tape and difficulty in effectively maintaining the effective insulation distance between the two electrodes, thus improving the insulation effect and operational safety. Attached Figure Description

[0017] Appendix Figure 1 This is a schematic diagram of the insulation and shielding device in this invention;

[0018] Appendix Figure 2This is a schematic diagram of the internal structure of the insulation and shielding device in this invention;

[0019] Appendix Figure 3 This is a schematic diagram of the folding cylinder structure in this invention;

[0020] Appendix Figure 4 This is a schematic diagram of the connection structure in this invention.

[0021] Reference numerals in the attached drawings: 1-fixed base; 2-first cylinder; 3-second cylinder; 4-third cylinder; 5-fourth cylinder; 6-limiting hole; 7-limiting flange; 8-second opening end; 9-adsorption structure; 10-ring mounting base; 11-connecting base; 12-connecting ear; 13-notch; 14-connecting hole; 15-limiting block. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The present invention will be described in one embodiment below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only and represent schematic diagrams, not actual pictures, and should not be construed as limiting the present patent. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the actual product size. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0023] like Figure 1-2 As shown, this embodiment provides a high-voltage test insulation shielding device, including an insulating cup, a fixing base 1 and a connecting structure. The insulating cup includes a cup body, a first open end and a second open end 8. The cup body is disposed between the first open end and the second open end 8 and has a foldable structure. The fixing base 1 is disposed at the first open end of the insulating cup and is provided with an adsorption structure 9. The connecting structure is disposed at the second open end 8 of the insulating cup.

[0024] It should be noted that the insulating cup in this embodiment is preferably a foldable and telescopic cup made of epoxy resin insulating material. The cup body structure forms a shield. The cup body is made of 6-8mm thick epoxy resin insulating material, which makes the cup body material soft and easy to fold and stretch. The cup body can be stretched into multiple layers or completely overlapped into one layer. At the same time, the cup body has insulating properties and can withstand the test voltage without being broken down.

[0025] The fixing base 1 is used to form a spatial barrier with the insulating cup to prevent discharge formation. It is preferably made of epoxy resin insulating material and is installed at the first open end of the insulating cup. With the help of the adsorption structure 9 provided on the fixing base 1, one end of the insulating cup can be adsorbed and fixed to the electrode or sleeve terminal block to ensure good contact. This makes it easy to stretch and pull the cup body of the insulating cup to wrap the entire electrode. At the same time, in order to improve the connection stability between the insulating cup and the fixing base 1, the first open end of the insulating cup can be replaced with a closed end.

[0026] The connecting structure is used to mount the insulating cup onto the external insulating rod. Preferably, the connecting structure is set at the second open end 8 of the insulating cup, opposite to the fixing seat 1 on the insulating cup. The user can move the insulating rod to move the connecting structure. Since the fixing seat 1 fixes one end of the insulating cup, the connecting structure can pull the second open end 8 of the insulating cup to unfold the cup body, so that the cup body covers one of the electrodes, separating the two electrodes. There is no need to remove the wires or protective gaps, nor is it necessary to use insulating tape to pull the wires away from the pressure application area and fix them. This ensures that there is a sufficient effective insulation distance between the two electrodes to facilitate the test operation and improves work efficiency.

[0027] In the existing technology, the operation process and disadvantages of traditional high-pressure testing under the following conditions are as follows:

[0028] (1) When testing the surge arrester at the neutral point of the transformer, the parallel protective gap must be removed;

[0029] The star-connected neutral point surge arrester and discharge gap of 110-220kV transformers are typical designs and are ubiquitous. Their purpose is to protect the neutral point insulation and ensure the safe operation of the transformer. One of the pre-test items for the neutral point surge arrester is the DC reference voltage and leakage current leakage test, which requires applying a test voltage of up to several hundred kilovolts across the surge arrester. This exceeds the voltage withstand level of the parallel discharge gap. Therefore, the connection between the surge arrester and the discharge gap must be disconnected before applying the voltage.

[0030] According to the traditional high-voltage testing procedure, the connection between the neutral point surge arrester and the discharge gap must be disconnected before the pressure test, and then restored after the test. This disassembly and assembly work is labor-intensive and time-consuming. Moreover, if the wiring is not restored properly, the gap may not be able to release overvoltage normally, damaging the neutral point insulation of the winding and causing a production accident. At the same time, since neutral point surge arresters are generally installed at a high position, about 4-7 meters, disconnection and reconnection work requires working at height, such as climbing ladders or using aerial work platforms, which poses a risk of falls from height and makes the operation highly dangerous.

[0031] (2) When testing the high-voltage side bushing of the transformer, the primary lead of the bushing needs to be removed and the lead is pulled away from the pressurized part with insulating tape, fixed and kept at a safe distance. However, this operation is cumbersome and consumes a lot of insulating tape. Moreover, the transformer bushing is usually quite high. The bushing of 110-220kV transformers is generally between 4-8 meters. Within the safe distance, there are no other binding tapes near the bushing to pull the conductor apart and fix it in place. Therefore, the primary lead needs to be tied firmly, the insulating tape is placed below the main transformer, and ground personnel are needed to pull the lead apart and find a suitable fixing point. At least two people are needed to cooperate, which consumes a lot of manpower and material resources.

[0032] (3) When testing the bushing on the low-voltage side (10kV) of the transformer, the flexible connection between the bushing and the hard copper busbar or the tube busbar must be disconnected and pulled apart to maintain a sufficient safe distance, or the entire flexible connection can be directly removed to maintain a sufficient safe distance. The dismantling work is extensive and time-consuming.

[0033] Compared with existing technologies, the operation process and advantages of the high-voltage test insulation shielding device provided by this invention in the above-mentioned working conditions are as follows:

[0034] (1) In the test of the transformer neutral point surge arrester, the initial state of the insulating cup is a fully folded state. The insulating cup is connected to the telescopic insulating rod in the prior art by the connecting structure. The user holds the insulating rod and, by adjusting the telescopic length of the insulating rod, sends the shielding device between the two electrodes of the protection gap. The electrode on the grounding side of the protection gap is the plate electrode, i.e., the positive electrode, and the electrode on the side of the protection gap connected to the surge arrester is the rod electrode, i.e., the negative electrode, forming a rod-plate discharge gap. In this invention, it is preferable to use the adsorption device on the fixed seat 1 to fix the first open end of the insulating cup to the positive electrode, and then move the insulating rod. The insulating rod pulls the connecting structure to drive the second open end 8 of the insulating cup to move away from the first open end, so that the cup body of the insulating cup unfolds in sequence, covering the entire electrode, forming an insulating barrier on the positive electrode, blocking the discharge breakdown path between the positive electrode and the plate electrode, and then carrying out the high voltage test.

[0035] After the high-voltage test, when the shielding device needs to be retracted, the insulating rod is moved in the reverse direction. The insulating rod pulls the connecting structure, causing the second open end (8 parts) of the insulating cup to move towards the first open end, completely folding the cup body and retracting the insulating rod. This allows the shielding device to disengage from the protective gap. Therefore, when using the shielding device of this invention for testing transformer neutral point surge arresters, it is unnecessary to remove the parallel protective gaps, simplifying the work process, improving work efficiency, and eliminating the need for high-altitude operations, thus improving operational safety.

[0036] (2) In the high-voltage side bushing test of the transformer, after the bushing lug is disassembled, the device can be inserted back into the bushing lug using an insulating rod. The first open end of the insulating cup is fixed by the adsorption structure 9 on the fixed base 1. The second open end 8 of the insulating cup is moved away from the first open end by the connecting structure pulled by the insulating rod, so that the device can be fitted onto the bushing lug. This can insulate the bushing lug from the lead wire without having to pull the lead wire away to a sufficient safe distance. It is convenient and quick. At the same time, the insulating cup can be stably fitted onto the electrode, which solves the problem of poor fixing effect of the insulating tape and difficulty in effectively maintaining the effective insulation distance between the two electrodes. This improves the insulation effect and the safety of operation.

[0037] (3) In the test of the bushing on the low voltage side (10kV) of the transformer, after the flexible connection of the bushing is removed from the bushing lug, the present invention is installed at the bushing lug. The first open end of the insulating cup is fixed by the adsorption structure 9 on the fixed base 1. The second open end 8 of the insulating cup is moved away from the first open end by the connecting structure pulled by the insulating rod. The present invention is thus sleeved on the bushing lug, so that the flexible connection between the bushing lug and the hard copper busbar or the tube can be insulated from each other without having to pull or remove the entire flexible connection, thus improving work efficiency.

[0038] In one embodiment, such as Figure 2-3 As shown, in order to facilitate the folding and stretching of the insulating cup, in this embodiment, the cup body includes several coaxial folding cylinders, which are slidably connected to each other. The diameter of each folding cylinder decreases sequentially from the second opening end 8 to the first opening end. One end of the folding cylinder is provided with a limiting hole 6, and the other end of the folding cylinder is provided with a limiting flange 7. The limiting flange 7 of each folding cylinder is sequentially connected to the limiting hole 6 of the adjacent folding cylinder.

[0039] It should be noted that the insulating cup in this embodiment is composed of four coaxial folded cylinders with gradually increasing diameters, and each folded cylinder can move relative to the other along the axis.

[0040] Taking the four-section folding cylinder in this embodiment as an example, namely the first cylinder 2, the second cylinder 3, the third cylinder 4 and the fourth cylinder 5 with increasing diameters in sequence, wherein the end of the first cylinder 2 with the limiting hole 6 is connected to the fixed base 1, the end of the second cylinder 3 with the limiting hole 6 is slidably connected to the end of the first cylinder 2 with the limiting flange 7, the end of the third cylinder 4 with the limiting hole 6 is slidably connected to the end of the second cylinder 3 with the limiting flange 7, and the end of the fourth cylinder 5 with the limiting hole 6 is slidably connected to the end of the third cylinder 4 with the limiting flange 7. The connecting structure is set on the fourth cylinder 5, and the limiting flange 7 and the limiting hole 6 between each cylinder can prevent each cylinder from detaching.

[0041] When the cup body is in the folded state, the four cylinders fold into a single cylindrical structure. Specifically, the first cylinder 2 is the innermost layer, the second cylinder 3 is fitted onto the outer wall of the first cylinder 2, the third cylinder 4 is fitted onto the outer wall of the second cylinder 3, and the fourth cylinder 5 is fitted onto the outer wall of the third cylinder 4. The fourth cylinder 5 is the outermost layer, and the first cylinder 2 to the fourth cylinder 5 respectively abut against and limit the fixing base 1 to prevent the cylinders from detaching in the folded state. As a result, the size of the cup body in the folded state is smaller than the distance between the two electrodes, about 10cm. This allows the insulating cup to be placed between the protective gaps without removing the parallel protective gaps, thus improving work efficiency.

[0042] When the cup body is in the unfolded state, due to the limiting flange 7 and limiting hole 6 between each cylinder, the maximum extended height of the cup body is the sum of the lengths of the first cylinder 2 to the fourth cylinder 5. By covering the electrodes with the unfolded cup body, the discharge effect between the two electrodes can be isolated, and a high voltage test can be carried out.

[0043] In addition, the insulating cup in this embodiment can also be a folding cup in the prior art, that is, the cup body is made of soft insulating material and several fold lines are set on the cup body so that the cup body can shrink along the fold lines and unfold along the fold lines, thus realizing the folding and unfolding function in this embodiment.

[0044] In one embodiment, such as Figure 1 As shown, in order to facilitate fixing the insulating cup and improve connection stability, in this embodiment, the fixing base 1 is a disc structure. The disc structure increases the connection area with the insulating cup. At the same time, it is preferable to design the diameter of the disc structure to be larger than the maximum diameter of the insulating cup, which is beneficial to limit and abut against the folding cylinder when the insulating cup is folded. The thickness of the disc structure can be designed to be 2cm and the diameter to be 10cm.

[0045] In one embodiment, such as Figure 1-2 As shown, in order to improve the connection stability between the insulating cup and the connecting structure, it is preferable to provide an annular mounting base 10 for installing the connecting structure on the second open end 8. Connecting the connecting structure to the annular mounting base 10 facilitates the replacement and maintenance of the connecting structure without damaging the insulating cup. On the other hand, the annular mounting base 10 increases the contact area between the connecting structure and the insulating cup, thereby improving the connection stability. The annular mounting base 10 can be designed as a circular ring structure, which makes it easy to directly fit onto the insulating cup. The annular mounting base 10 and the insulating cup can be connected by bolts or other methods.

[0046] In one embodiment, such as Figure 4As shown, to facilitate the connection between the connecting structure and the annular mounting base 10 and the insulating rod, in this embodiment, the connecting structure includes a connecting base 11 and a connecting ear 12. The connecting base 11 is connected to the annular mounting base 10, and the connecting ear 12 is connected to the connecting base 11. The connecting ear 12 has a notch 13. Meanwhile, to increase the connection area between the connecting base 11 and the annular mounting base 10 and improve connection stability, the connecting base 11 is preferably designed as an arc-shaped structure, and several connecting holes 14 are provided on the connecting base 11. Bolts can be installed in the connecting holes 14 to achieve the connection between the connecting base 11 and the annular mounting base 10. Furthermore, to improve the structural strength of the connecting ear 12 and to limit the insulating rod and prevent displacement, several limiting blocks 15 are provided on the connecting ear 12.

[0047] It should be noted that, in this embodiment, when the connecting ear 12 is connected to the insulating rod, the structure of the insulating rod can be connected to the notch 13 of the connecting ear 12. The connecting structure is fixed to the top of the insulating rod by the mounting screw. Adjusting the extension length and horizontal position of the insulating rod can move the connecting structure, thereby causing the insulating rod to extend or fold. At the same time, by utilizing the notch 13 on the connecting ear 12, the connecting screw between the insulating rod and the connecting ear 12 does not need to be completely unscrewed to separate the insulating rod from the connecting ear 12, improving the efficiency of disassembly and assembly. Moreover, the limiting block 15 on the connecting ear 12 can match the connection part of the insulating rod, on the one hand restricting the rotation of the insulating rod under force, thereby affecting the folding or extension of the insulating cup, and on the other hand improving the structural strength of the connecting ear 12.

[0048] In one embodiment, such as Figure 1 As shown in this embodiment, to facilitate the installation of the adsorption structure 9 and improve the adsorption effect, the adsorption structure 9 is preferably a conductive strong magnet, which is used to adsorb onto the electrode of the protective gap or the bushing terminal block to ensure good contact. This facilitates fixing one end of the insulating cup onto the electrode first, making it easier for the insulating cup to extend or fold later. Furthermore, since the protective gap is actually made of welded steel bars, which are relatively thin and have a small equivalent radius of curvature, the electric field strength is large under the same voltage, making it easier for air to break down. When this device is fitted onto the protective gap, the conductive strong magnet adsorbs onto the steel bars, which can act as a voltage equalization ring, increasing the equivalent radius of curvature and improving the gap's dielectric strength.

[0049] Working principle:

[0050] This invention provides a high-voltage test insulation shielding device. During the high-voltage test, the insulating cup is initially in a fully folded state. A connecting structure connects the insulating cup to a retractable insulating rod (as in existing technology). The user holds the insulating rod and adjusts its extension length to insert the shielding device between the two electrodes of the protective gap. An adsorption device on the fixing base 1 fixes the first open end of the insulating cup to the positive electrode. The insulating rod is then moved, pulling the connecting structure to move the second open end 8 of the insulating cup away from the first open end, causing the cup body to unfold sequentially, covering the entire electrode and forming an insulation barrier on the positive electrode, blocking the discharge breakdown path between the positive electrode and the plate electrode. The high-voltage test is then conducted. After the high-voltage test, when the shielding device needs to be retracted, the insulating rod is moved in the opposite direction, pulling the connecting structure to move the second open end 8 of the insulating cup closer to the first open end, causing the cup body to fully fold and the insulating rod to retract, allowing the shielding device to disengage from the protective gap. Therefore, when using the shielding device of the present invention to conduct high-voltage tests, it is not necessary to remove its parallel protective gap, which simplifies the working steps, improves the working efficiency, and eliminates the need for high-altitude operations, thereby improving operational safety. At the same time, the insulating cup can be stably fitted on the electrode, solving the problem of poor fixing effect of the insulating tape and difficulty in effectively maintaining the effective insulation distance between the two electrodes, thus improving the insulation effect and operational safety.

[0051] In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances. In addition, if the embodiments of this invention involve descriptions of "first," "second," etc., such descriptions are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of those features. Furthermore, the meaning of "and / or" throughout the text is to include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution that simultaneously satisfies A and B.

[0052] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention, or direct / indirect applications in other related technical fields, should be included within the scope of protection of the claims of the present invention.

Claims

1. A high-voltage test insulation shielding device, characterized in that, The invention includes an insulating cup, a fixing base, and a connecting structure. The insulating cup includes a cup body, a first opening end, and a second opening end. The cup body is disposed between the first opening end and the second opening end and has a foldable structure. The fixing base is disposed at the first opening end of the insulating cup and has an adsorption structure. The connecting structure is disposed at the second opening end of the insulating cup. The adsorption structure is a strong, conductive magnet, and when adsorbed onto the electrode, it is used to increase the equivalent radius of curvature of the electrode.

2. The high-voltage test insulation shielding device according to claim 1, characterized in that, The cup body includes several coaxial folded cylinders, which are slidably connected to each other, and the diameter of each folded cylinder decreases sequentially from the second opening end to the first opening end.

3. The high-voltage test insulation shielding device according to claim 2, characterized in that, One end of the folding cylinder is provided with a limiting hole, and the other end of the folding cylinder is provided with a limiting flange. The limiting flanges of each folding cylinder are sequentially connected to the limiting holes of adjacent folding cylinders.

4. A high-voltage test insulation shielding device according to claim 3, characterized in that, The fixing base is a disc structure, and each of the folded cylinders, after being folded into a single structure, abuts against the fixing base.

5. A high-voltage test insulation shielding device according to claim 1, characterized in that, An annular mounting base for installing the connecting structure is fitted onto the second open end.

6. A high-voltage test insulation shielding device according to claim 5, characterized in that, The connection structure includes a connecting seat and a connecting ear. The connecting seat is connected to the annular mounting seat, and the connecting ear is connected to the connecting seat. The connecting ear has a notch.

7. A high-voltage test insulation shielding device according to claim 6, characterized in that, The connector has an arc-shaped structure and is provided with several connection holes.

8. A high-voltage test insulation shielding device according to claim 6, characterized in that, The connecting ear is provided with several limiting blocks.

9. A high-voltage test insulation shielding device according to any one of claims 1-8, characterized in that, The body of the cup is made of epoxy resin insulating material.

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