High-voltage cable test auxiliary device

Abstract

The utility model discloses a high-voltage cable test auxiliary device, comprising an insulating gas tank, the insulating gas tank is provided with a chamber used for filling insulating gas, a first interface located at one end of the chamber and a second interface located at the other end of the chamber, and the first interface is used for a field GIS terminal connected to a high-voltage cable to pass through; and the intermediate GIS terminal is arranged in the second interface in a penetrating manner, and the intermediate GIS terminal is electrically connected with the field GIS terminal through a conductor arranged in the cavity. When the safety clear distance of the space where the GIS switch is located is not enough, the space is limited, and the test device is inconvenient to place, the high-voltage cable test auxiliary device can play an auxiliary role, so that the high-voltage cable test can be normally carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of cable testing, in particular to a high-voltage cable testing auxiliary device. Background Art

[0002] In recent years, the construction of high-voltage, extra-high-voltage and even ultra-high-voltage transmission cable lines in my country has developed rapidly. High-voltage cable GIS terminals are an indispensable part of the transmission system. Among them, the function of some high-voltage cable GIS terminals is to connect the cable system with the GIS switch. In new projects, before connecting the cable system to the GIS switch through the cable GIS terminal, it is often necessary to conduct on-site handover tests on the cable system and the GIS switch separately. Among them, the cable system is tested by applying high voltage on the cable GIS terminal side, and the cable GIS terminal cannot apply voltage alone, so a test device is needed at this time. GIS switches are generally indoors. When the indoor safety clearance is insufficient and the indoor space is limited and it is inconvenient to place the test device, the high-voltage cable system cannot be tested. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a high-voltage cable test auxiliary device. When the space where the GIS switch is located is not safe enough and the space is limited and it is inconvenient to place the test device, the high-voltage cable test auxiliary device can play an auxiliary role so that the high-voltage cable test can be carried out normally.

[0004] According to some embodiments of the utility model, the high-voltage cable test auxiliary device includes: an insulating gas tank, which has a chamber for filling with insulating gas, a first interface located at one end of the chamber, and a second interface located at the other end of the chamber, the first interface is used for the on-site GIS terminal connected to the high-voltage cable to pass through; an intermediate GIS terminal, the intermediate GIS terminal is passed through the second interface, and the intermediate GIS terminal is electrically connected to the on-site GIS terminal through a conductor arranged in the chamber.

[0005] The high-voltage cable test auxiliary device according to the embodiment of the utility model has at least the following beneficial effects:

[0006] When the high-voltage cable test auxiliary device of the utility model is used, the high-voltage cable test auxiliary device can be placed in a relatively narrow space where a GIS switch is located. The on-site GIS terminal connected to the on-site high-voltage cable is inserted into the insulating gas tank through the first interface of the insulating gas tank. The other end of the insulating gas tank is pre-installed with an intermediate GIS terminal through the second interface. The gas tank is filled with SF6 gas as an insulating gas. One end of the intermediate GIS terminal leads to an intermediate cable of a certain length. The intermediate cable passes through the space where the GIS switch is located and leads to a spacious space that is convenient for testing (convenient for loading high voltage). In this way, when the high-voltage cable is subjected to an on-site handover test, the space at the GIS switch is limited, the test device cannot be placed, and the safety clearance at the GIS switch is insufficient. With the help of the high-voltage cable test auxiliary device of the utility model, the high-voltage cable can be led out for testing.

[0007] According to some embodiments of the utility model, the intermediate GIS terminal has a first clamping step; the other end of the insulating gas tank is connected to a first annular clamping plate, the first annular clamping plate is connected to a second annular clamping plate through a first fastener, the second annular clamping plate is located on the side of the first annular clamping plate away from the insulating gas tank, and the first clamping step is clamped between the first annular clamping plate and the second annular clamping plate.

[0008] According to some embodiments of the present utility model, the first clamping step is sealingly matched with the first annular clamping plate; the first clamping step is sealingly matched with the second annular clamping plate.

[0009] According to some embodiments of the present utility model, the first clamping step has a first step surface arranged opposite to the first annular clamping plate, and a first sealing ring is arranged between the first step surface and the first annular clamping plate.

[0010] According to some embodiments of the utility model, the first clamping step also has a second step surface arranged opposite to the first step surface, the second step surface is arranged opposite to the second annular clamping plate, and a second sealing ring is arranged between the second step surface and the second annular clamping plate.

[0011] According to some embodiments of the present invention, the first fastener is operable to drive the second annular clamping plate to approach or move away from the first annular clamping plate.

[0012] According to some embodiments of the utility model, the first fastener is a bolt, the first annular clamping plate is provided with a screw hole, the second annular clamping plate is provided with a through hole, and the first fastener is sequentially passed through the through hole and the screw hole.

[0013] According to some embodiments of the utility model, a roller is provided at the bottom of the insulating gas tank.

[0014] According to some embodiments of the present invention, a pressure gauge for detecting the internal air pressure of the chamber is installed on the insulating gas tank.

[0015] According to some embodiments of the present utility model, the insulating gas tank is a horizontal cylindrical structure.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0018] Figure 1 This is a structural schematic diagram of a high-voltage cable test system according to an embodiment of the utility model;

[0019] Figure 2 This is a structural schematic diagram of a high-voltage cable test auxiliary device according to an embodiment of the utility model;

[0020] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0021] Figure 4 for Figure 2 The enlarged view of point B in the middle;

[0022] Figure 5 for Figure 2 Enlarged view of point C in the middle.

[0023] Figure Number:

[0024] 100. High-voltage cable test auxiliary device; 110. Insulating gas tank; 110a. First sealing ring; 110b. Second sealing ring; 110c. Third sealing ring; 110d. Fourth sealing ring; 111. Chamber; 112. First annular clamping plate; 113. Second annular clamping plate; 114. First fastener; 115. Third annular clamping plate; 116. Fourth annular clamping plate; 117. Second fastener; 120. Intermediate GIS terminal; 121. First clamping step; 130. Conductor; 140. Roller; 150. Barometer;

[0025] 200, high voltage cable; 210, on-site GIS terminal; 211, second clamping step;

[0026] 300. Test equipment;

[0027] 400, intermediate cable;

[0028] 500, outdoor terminal;

[0029] 600. High voltage line. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] like Figure 1 As shown, the utility model provides a high-voltage cable test system, which includes a high-voltage cable test auxiliary device 100 . The high-voltage cable test auxiliary device 100 includes an insulating gas tank 110 and an intermediate GIS terminal 120 .

[0034] like Figure 2 As shown, the insulating gas tank 110 has a chamber 111 for filling the insulating gas, a first interface located at one end of the chamber 111 , and a second interface located at the other end of the chamber 111 .

[0035] Specifically, the insulating gas tank 110 is a hollow structure having a chamber 111 , and the first interface and the second interface are respectively located at two opposite ends of the chamber 111 , and both the first interface and the second interface are in communication with the chamber 111 .

[0036] More specifically, the insulating gas tank 110 is a horizontal long cylindrical structure, and the first interface and the second interface are respectively located at the left and right ends of the insulating gas tank 110. The first interface is used for the on-site GIS terminal 210 connected to the high-voltage cable 200 to pass through, and the second interface is used for the intermediate GIS terminal 120 to pass through. The intermediate GIS terminal 120 is electrically connected to the on-site GIS terminal 210 through the conductor 130 disposed in the chamber 111, and the conductor 130 can be a material with high conductivity such as gold and copper.

[0037] It can be understood that the chamber 111 is used for filling with insulating gas, and the insulating gas can be SF6. The on-site GIS terminal 210 can seal the first interface after being installed in the first interface, and the intermediate GIS terminal 120 can seal the second interface after being installed in the second interface.

[0038] like Figure 1 As shown, it should be noted that the on-site GIS terminal 210 is connected to the end of the high-voltage cable 200, and the on-site GIS terminal 210 can improve the electric field distortion at the end of the high-voltage cable 200 and make the electric field uniform; the intermediate GIS terminal 120 is connected to the end of the intermediate cable 400, and the end of the intermediate cable 400 away from the intermediate GIS terminal 120 is used to connect with the test device 300, wherein the intermediate GIS terminal 120 can improve the electric field distortion at the end of the intermediate cable 400 and make the electric field uniform.

[0039] It should be further explained that the test device 300 is a power frequency withstand voltage test device, which can generate voltage so that the entire tested high-voltage cable 200 undergoes a withstand voltage test.

[0040] Furthermore, the test device 300 is connected to a high-voltage line 600, and the end of the intermediate cable 400 away from the intermediate GIS terminal 120 is connected to an outdoor terminal 500, and the outdoor terminal 500 is connected to the high-voltage line 600. The outdoor terminal 500 can improve the electric field distortion at the end of the intermediate cable 400 away from the intermediate GIS terminal 120 and make the electric field uniform. The test device 300 can generate a voltage, which can be guided to the outdoor terminal 500 through the high-voltage line 600, and transmitted to the on-site GIS terminal 210 and the high-voltage cable 200 through the intermediate cable 400, the intermediate GIS terminal 120, and the conductor 130. Among them, the outdoor terminal 500 is an integral prefabricated outdoor terminal. It can be understood that while the high-voltage cable 200 is being tested, the on-site GIS terminal 210 is also tested because the on-site GIS terminal 210 is also inserted into the insulating gas tank 110.

[0041] It should be noted that by inserting the on-site GIS terminal 210 into the first interface, inserting the intermediate GIS terminal 120 into the second interface, and using insulating gas to insulate and protect the on-site GIS terminal 210 and the intermediate GIS terminal 120, the risk of electrical breakdown can be reduced.

[0042] When the high-voltage cable test auxiliary device 100 of the utility model is used, the high-voltage cable test auxiliary device 100 can be placed in a relatively narrow space where a GIS switch is located. The on-site GIS terminal 210 connected to the on-site high-voltage cable 200 is inserted into the insulating gas tank 110 through the first interface of the insulating gas tank 110. The other end of the insulating gas tank 110 is pre-installed with an intermediate GIS terminal 120 through the second interface. The gas tank is filled with SF6 gas as an insulating gas. One end of the intermediate GIS terminal 120 leads out a certain length of intermediate cable 400, and the intermediate cable 400 passes through the space where the GIS switch is located and leads to a spacious space that is convenient for testing (convenient for loading high voltage). In this way, when the high-voltage cable 200 is tested on site, the space at the GIS switch is limited, the test device 300 cannot be placed, and the safety clearance at the GIS switch is insufficient. With the help of the high-voltage cable test auxiliary device 100 of the utility model, the high-voltage cable 200 can be led out for testing.

[0043] like Figure 3 As shown, in some embodiments, the intermediate GIS terminal 120 has a first clamping step 121; the end of the insulating gas tank 110 away from the first interface is connected to a first annular clamping plate 112, and the first annular clamping plate 112 is connected to a second annular clamping plate 113 through a first fastener 114, and the second annular clamping plate 113 is located on the side of the first annular clamping plate 112 away from the insulating gas tank 110, and the first clamping step 121 is clamped between the first annular clamping plate 112 and the second annular clamping plate 113.

[0044] It can be understood that the side of the intermediate GIS terminal 120 is raised to form a first clamping step 121. After the intermediate GIS terminal 120 is inserted into the second interface and abutted against the first annular clamping plate 112, the second annular clamping plate 113 is connected to the first annular clamping plate 112 by using the first fastener 114, and the second annular clamping plate 113 is abutted against the first clamping step 121 away from the side of the first annular clamping plate 112, so that the intermediate GIS terminal 120 can be fixed.

[0045] Furthermore, the first clamping step 121 is sealed with the first annular clamping plate 112; the first clamping step 121 is sealed with the second annular clamping plate 113. In this way, when the intermediate GIS terminal 120 is inserted into the second interface, the sealing of the second interface can be achieved, ensuring the sealing effect of the chamber 111.

[0046] Specifically, the first clamping step 121 has a first step surface arranged opposite to the first annular clamping plate 112, and a first sealing ring 110a is arranged between the first step surface and the first annular clamping plate 112. The first clamping step 121 also has a second step surface arranged opposite to the first step surface, and the second step surface is arranged opposite to the second annular clamping plate 113, and a second sealing ring 110b is arranged between the second step surface and the second annular clamping plate 113.

[0047] Furthermore, the first fastener 114 can operably drive the second annular clamping plate 113 to move closer to or away from the first annular clamping plate 112 .

[0048] It is understandable that the first fastener 114 can change the distance between the second annular clamping plate 113 and the first annular clamping plate 112 , thereby adjusting the pre-tightening force of the first clamping step 121 , thereby adjusting the sealing effect.

[0049] Specifically, the first fastener 114 is a bolt, the first annular clamping plate 112 is provided with a screw hole, the second annular clamping plate 113 is provided with a through hole, and the first fastener 114 is passed through the through hole and the screw hole in sequence. By rotating the first fastener 114, the distance between the second annular clamping plate 113 and the first annular clamping plate 112 can be changed.

[0050] like Figure 4 As shown, in some embodiments, the on-site GIS terminal 210 has a second clamping step 211; the end of the insulating gas tank 110 away from the second interface is connected to a third annular clamping plate 115, and the third annular clamping plate 115 is connected to a fourth annular clamping plate 116 through a second fastener 117. The fourth annular clamping plate 116 is located on the side of the third annular clamping plate 115 away from the insulating gas tank 110, and the second clamping step 211 is clamped between the third annular clamping plate 115 and the fourth annular clamping plate 116.

[0051] It can be understood that the side of the on-site GIS terminal 210 is raised to form a second clamping step 211. After the on-site GIS terminal 210 is inserted into the first interface and abutted against the third annular clamping plate 115, the second fastener 117 is used to connect the fourth annular clamping plate 116 to the third annular clamping plate 115, and the fourth annular clamping plate 116 is abutted against the second clamping step 211 away from the side of the third annular clamping plate 115, so that the on-site GIS terminal 210 can be fixed.

[0052] Furthermore, the second clamping step 211 is sealed with the third annular clamping plate 115, and the second clamping step 211 is sealed with the fourth annular clamping plate 116. Thus, when the on-site GIS terminal 210 is inserted into the first interface, the sealing of the first interface can be achieved, and the sealing effect of the chamber 111 can be ensured.

[0053] Specifically, the second clamping step 211 has a third step surface arranged opposite to the third annular clamping plate 115, and a third sealing ring 110c is arranged between the third step surface and the third annular clamping plate 115. The second clamping step 211 also has a fourth step surface arranged opposite to the third step surface, and the fourth step surface is arranged opposite to the fourth annular clamping plate 116, and a fourth sealing ring 110d is arranged between the fourth step surface and the fourth annular clamping plate 116.

[0054] Furthermore, the second fastener 117 can operably drive the fourth annular clamping plate 116 to move closer to or away from the third annular clamping plate 115 .

[0055] It is understandable that the second fastener 117 can change the distance between the fourth annular clamping plate 116 and the third annular clamping plate 115 , thereby adjusting the pre-tightening force of the second clamping step 211 , thereby adjusting the sealing effect.

[0056] Specifically, the second fastener 117 is a bolt, the third annular clamping plate 115 is provided with a screw hole, the fourth annular clamping plate 116 is provided with a through hole, and the second fastener 117 is sequentially passed through the through hole and the screw hole. By rotating the second fastener 117, the distance between the fourth annular clamping plate 116 and the third annular clamping plate 115 can be changed.

[0057] like Figure 2 As shown, in some embodiments, a roller 140 is provided at the bottom of the insulating gas tank 110. In this way, the insulating gas tank 110 can be easily moved and easily moved into the space where the GIS switch is located.

[0058] like Figure 5 As shown, further, a pressure gauge for detecting the internal air pressure of the chamber 111 is installed on the insulating gas tank 110. In addition, the insulating gas tank 110 is made of metal parts such as stainless steel or copper, which can withstand an air pressure of 2Mpa, and the pressure of the insulating gas filled in the insulating gas tank 110 is not less than 0.25Mpa.

[0059] In the high-voltage cable test system of the utility model, the high-voltage cable test auxiliary device 100 can be placed in a relatively narrow space where the GIS switch is located, and the field GIS terminal 210 connected to the field high-voltage cable 200 is inserted into the insulating gas tank 110 through the first interface of the insulating gas tank 110. The other end of the insulating gas tank 110 is pre-installed with an intermediate GIS terminal 120 through the second interface. The gas tank is filled with SF6 gas as an insulating gas. One end of the intermediate GIS terminal 120 leads to a certain length of intermediate cable 400, and the intermediate cable 400 passes through the space where the GIS switch is located and leads to a spacious space that is convenient for testing (convenient for loading high voltage). The test device 300 can generate voltage, which can be guided to the outdoor terminal 500 through the high-voltage line 600, and is transmitted to the field GIS terminal 210 and the high-voltage cable 200 through the intermediate cable 400, the intermediate GIS terminal 120, and the conductor 130, thereby realizing the high-voltage test of the high-voltage cable 200 and the field GIS terminal 210. In this way, when the high-voltage cable 200 is subjected to an on-site handover test, the space at the GIS switch is limited and the test device 300 cannot be placed, or the safety clearance at the GIS switch is insufficient. With the help of the high-voltage cable test auxiliary device 100 of the utility model, the high-voltage cable 200 can be led out to facilitate testing.

[0060] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0061] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A high voltage cable test auxiliary device, characterized in that: include: An insulating gas tank, the insulating gas tank having a chamber for filling with insulating gas, a first interface at one end of the chamber, and a second interface at the other end of the chamber, the first interface being used for passing through an on-site GIS terminal connected to a high-voltage cable; An intermediate GIS terminal is provided in the second interface, and the intermediate GIS terminal is electrically connected to the on-site GIS terminal via a conductor provided in the chamber.

2. The high voltage cable test auxiliary device according to claim 1, characterized in that: The intermediate GIS terminal has a first clamping step; the other end of the insulating gas tank is connected to a first annular clamping plate, the first annular clamping plate is connected to a second annular clamping plate through a first fastener, the second annular clamping plate is located on the side of the first annular clamping plate away from the insulating gas tank, and the first clamping step is clamped between the first annular clamping plate and the second annular clamping plate.

3. The high voltage cable test auxiliary device according to claim 2, characterized in that: The first clamping step is in sealing cooperation with the first annular clamping plate; the first clamping step is in sealing cooperation with the second annular clamping plate.

4. The high voltage cable test auxiliary device according to claim 3, characterized in that: The first clamping step has a first step surface arranged opposite to the first annular clamping plate, and a first sealing ring is arranged between the first step surface and the first annular clamping plate.

5. The high voltage cable test auxiliary device according to claim 4, characterized in that: The first clamping step also has a second step surface arranged opposite to the first step surface, the second step surface is arranged opposite to the second annular clamping plate, and a second sealing ring is arranged between the second step surface and the second annular clamping plate.

6. The high voltage cable test auxiliary device according to claim 2, characterized in that: The first fastener is operable to drive the second annular clip plate toward or away from the first annular clip plate.

7. The high voltage cable test auxiliary device according to claim 6, characterized in that: The first fastener is a bolt, the first annular clamping plate is provided with a screw hole, the second annular clamping plate is provided with a through hole, and the first fastener is sequentially inserted through the through hole and the screw hole.

8. The high voltage cable test auxiliary device according to claim 1, characterized in that: The bottom of the insulating gas tank is provided with rollers.

9. The high voltage cable test auxiliary device according to claim 1, characterized in that: The insulating gas tank is provided with a pressure gauge for detecting the internal air pressure of the chamber.

10. The high voltage cable test auxiliary device according to claim 1, characterized in that: The insulating gas tank is a horizontal cylindrical structure.

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