A docking device and pressure test equipment for GIS pressure test

Abstract

The present invention provides a docking device and a voltage test equipment for GIS withstand voltage test, which belong to the field of electrical testing devices. The docking device for GIS withstand voltage test includes a shell, a withstand voltage conductor and a conductive joint. The shell is provided with a withstand voltage test connection port and a GIS connection port. The end of the conductive joint away from the adjustable conductor is a threaded connection part for connecting with the conductor of GIS. The withstand voltage conductor is an adjustable conductor that can bend and deform. The shell is also provided with a hand hole for disassembling and assembling the conductive joint, and a cover plate for closing the hand hole is provided at the hand hole. The withstand voltage test equipment includes an equipment body and a docking device. The withstand voltage conductor in the present invention is an adjustable conductor that can bend and deform, which reduces the difficulty of docking, improves the efficiency of the preparation work before the withstand voltage test, and can use different types of GIS to reduce the production cost of GIS.

Description

Technical Field

[0001] The invention belongs to the field of electric testing devices, and in particular relates to a docking device and pressure test equipment for GIS pressure test. Background Art

[0002] With the development of offshore wind power technology, the capacity of offshore wind turbines has gradually increased from 4MW to 8MW, and 10MW wind turbines have been demonstrated and applied. The voltage level of the GIS (gas insulated switchgear) supporting the wind turbines also needs to be increased from 40.5kV to 72.5kV. In the future, the GIS supporting offshore wind turbines will mainly be 72.5kV and above.

[0003] GIS needs to undergo a withstand voltage test before leaving the factory to ensure that its withstand voltage capacity meets the relevant standard requirements. Before conducting the withstand voltage test, the GIS needs to be conductively connected to the withstand voltage test equipment. The GIS for offshore wind power uses a three-phase conductor common box structure, and the three-phase conductors share one insulator. When connecting the GIS to the withstand voltage test equipment, it is necessary to first install conductive connectors on the three-phase conductors of the GIS, and then simultaneously plug the three conductive connectors into the three withstand voltage conductors installed at the interface of the withstand voltage test equipment.

[0004] It is difficult to dock the three phases at the same time, and the interface of the pressure test equipment is equipped with a shell for filling with insulating gas. The GIS needs to be connected to the shell in the end, so it is difficult for the operator to observe the state of the conductive joint and the pressure conductor during the docking process. Therefore, it is often difficult to complete the docking operation in one go during the actual operation, and multiple adjustments are required, which leads to a longer preparation period for the pressure test and reduces the production efficiency of the product. Moreover, for different models of GIS products, the spacing of the three-phase conductors may be different, and different pressure test equipment needs to be equipped for different GIS products. The test investment is large, which indirectly increases the production cost of GIS. Summary of the invention

[0005] One of the purposes of the present invention is to provide a docking device for GIS pressure test to solve the technical problems in the prior art that the docking between GIS and pressure test equipment is difficult and time-consuming, and the pressure test equipment is difficult to adapt to various types of GIS.

[0006] Another object of the present invention is to provide a pressure test device to solve the above technical problems.

[0007] To achieve the above purpose, the technical solution of the docking device for GIS pressure test provided by the present invention is: A docking device for GIS withstand voltage test comprises a shell, a withstand voltage conductor and a conductive joint. The shell is provided with a withstand voltage test connection port for connecting to a device body of the withstand voltage test device and a GIS connection port for connecting to a GIS. One end of the withstand voltage conductor is used for conductive connection to the device body of the withstand voltage test device, and the other end of the withstand voltage conductor is conductively connected to the conductive joint. The end of the conductive joint away from the adjustable conductor is a threaded connection portion for connecting to the conductor of the GIS. The withstand voltage conductor is an adjustable conductor capable of flexural deformation. The shell is also provided with a hand hole for disassembling and assembling the conductive joint, and a cover plate for closing the hand hole is provided at the hand hole.

[0008] As a further improvement, one of the adjustable conductor and the conductive joint is provided with a plug hole, and the other is provided with a plug-in portion that plugs and cooperates with the plug hole.

[0009] As a further improvement, the jack is a round hole.

[0010] As a further improvement, when in use, there is a redundant spacing between the end face of the plug-in portion and the bottom wall of the hole, and the redundant spacing is greater than the axial length of the threaded connection portion.

[0011] As a further improvement, the jack is arranged on the conductive joint, the adjustable conductor is a structure with a constant cross-section in the length direction, and one end of the adjustable conductor in the length direction is a plug-in portion.

[0012] As a further improvement, a finger contact groove is provided on the inner wall of the plug hole, and a spring finger contact for tightly fitting with the plug-in portion is provided in the finger contact groove.

[0013] As a further improvement, a wrench structure for cooperating with a wrench tool is provided on the adjustable conductor.

[0014] As a further improvement, the wrenching structure is a wrenching hole provided on the adjustable conductor and for inserting a wrenching tool, and at least two wrenching holes are provided at intervals along the outer circumference of the adjustable conductor.

[0015] As a further improvement, the end of the adjustable conductor away from the conductive joint is fixedly connected to a adapter, the length direction of the adapter is perpendicular to the length direction of the adjustable conductor, one end of the adapter in the length direction is connected to the adjustable conductor, and the other end is used to connect to the corresponding conductor on the equipment body of the voltage withstand test equipment.

[0016] The beneficial effect is that the docking device for GIS withstand voltage test provided by the present invention is an improvement on the prior art. The docking device sets the withstand voltage conductor as an adjustable conductor that can bend and deform, so that during the docking process, it is convenient for the operator to manually dock the adjustable conductor with the conductive joint one by one, or to first connect the conductive joint with the adjustable conductor and then connect it with the conductor on the GIS one by one, thereby reducing the difficulty of docking, improving the efficiency of the preparation work before the withstand voltage test, and thus improving the production efficiency of the GIS product. Moreover, for different models of GIS products, the positions of the conductors are slightly different, and the adjustable conductor can also be used to adapt, thereby improving the versatility of the withstand voltage test equipment and reducing the production cost of GIS products.

[0017] To achieve the above purpose, the technical solution of the pressure test equipment provided by the present invention is: A withstand voltage test device comprises an equipment body and a docking device arranged at an interface of the equipment body, the docking device comprises a shell, a withstand voltage conductor and a conductive joint, the shell is provided with a withstand voltage test connection port for connecting with the equipment body of the withstand voltage test device and a GIS connection port for connecting with a GIS, one end of the withstand voltage conductor is used for conductive connection with the equipment body of the withstand voltage test device, the other end of the withstand voltage conductor is conductively connected with the conductive joint, one end of the conductive joint away from the adjustable conductor is a threaded connection portion for connecting with the conductor of the GIS, the withstand voltage conductor is an adjustable conductor capable of flexural deformation, the shell is further provided with a hand hole for disassembling and assembling the conductive joint, and a cover plate for closing the hand hole is provided at the hand hole.

[0018] As a further improvement, one of the adjustable conductor and the conductive joint is provided with a plug hole, and the other is provided with a plug-in portion that plugs and cooperates with the plug hole.

[0019] As a further improvement, the jack is a round hole.

[0020] As a further improvement, when in use, there is a redundant spacing between the end face of the plug-in portion and the bottom wall of the hole, and the redundant spacing is greater than the axial length of the threaded connection portion.

[0021] As a further improvement, the jack is arranged on the conductive joint, the adjustable conductor is a structure with a constant cross-section in the length direction, and one end of the adjustable conductor in the length direction is a plug-in portion.

[0022] As a further improvement, a finger contact groove is provided on the inner wall of the plug hole, and a spring finger contact for tightly fitting with the plug-in portion is provided in the finger contact groove.

[0023] As a further improvement, a wrench structure for cooperating with a wrench tool is provided on the adjustable conductor.

[0024] As a further improvement, the wrenching structure is a wrenching hole provided on the adjustable conductor and for inserting a wrenching tool, and at least two wrenching holes are provided at intervals along the outer circumference of the adjustable conductor.

[0025] As a further improvement, the end of the adjustable conductor away from the conductive joint is fixedly connected to a adapter, the length direction of the adapter is perpendicular to the length direction of the adjustable conductor, one end of the adapter in the length direction is connected to the adjustable conductor, and the other end is used to connect to the corresponding conductor on the equipment body of the voltage withstand test equipment.

[0026] The beneficial effect is that the voltage test equipment provided by the present invention is an improvement on the prior art. The docking device in the voltage test equipment sets the voltage-resistant conductor as an adjustable conductor that can bend and deform, so that during the docking process, it is convenient for the operator to manually dock the adjustable conductor with the conductive connector one by one, or to first connect the conductive connector with the adjustable conductor and then connect it one by one with the conductor on the GIS, thereby reducing the difficulty of docking, improving the efficiency of the preparation work before the voltage test, and thus improving the production efficiency of GIS products. Moreover, for different models of GIS products, the positions of their conductors are slightly different, and the adjustable conductor can also be used to adapt, thereby improving the versatility of the voltage test equipment and reducing the production cost of GIS products. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of Embodiment 1 of the pressure test equipment of the present invention; Figure 2 It is a schematic structural diagram of a conductive joint of Example 1 of a withstand voltage test device in the present invention; Figure 3 is a cross-sectional view of Example 1 of the pressure test equipment of the present invention; Figure 4 It is a schematic diagram of the structure of the conductive joint of Example 5 of the voltage resistance test equipment in the present invention.

[0028] Description of reference numerals: 1. Shell; 11. Withstand voltage test connection port; 12. GIS connection port; 13. Hand hole; 2. Conductive joint; 21. Main body; 211. Connecting sleeve; 212. Rod body; 22. Threaded connection part; 23. Socket; 24. Finger groove; 25. Stop step; 26. Wrench hole; 3. Adjustable conductor; 4. Cover plate; 5. Adapter; 6. Equipment body; 7. GIS. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with embodiments.

[0030] In order to solve the problems in the prior art, the basic concept of the present invention is to set the voltage-resistant conductor as an adjustable conductor that can undergo flexural deformation, so as to reduce the difficulty of docking with GIS, improve the efficiency of preparation work before the voltage-resistant test, and facilitate adaptation to different models of GIS.

[0031] Specific embodiment 1 of the pressure test equipment provided by the present invention: A pressure test equipment, see attached Figure 1 , including a device body 6 and a docking device arranged at the interface of the device body 6.

[0032] The docking device comprises a shell 1 and a voltage-resistant conductor and a conductive joint 2 located in the shell 1. Three voltage-resistant conductors and three conductive joints 2 are provided and correspond to each other.

[0033] The shell 1 is cylindrical as a whole, and one axial end of the shell 1 is a pressure test connection port 11 for connecting to the equipment body 6, and the other axial end of the shell 1 is a GIS connection port 12 for connecting to GIS7. The pressure test connection port 11 is connected to the pressure test equipment through a flange, and the GIS connection port 12 is connected to the insulator of GIS7 through a flange.

[0034] The pressure-resistant conductor is an adjustable conductor 3 that can bend and deform when the operator applies radial force. The adjustable conductor 3 is a rod with a circular cross-section and a uniform cross-section. One end of the adjustable conductor 3 is conductively connected to the corresponding conductor of the device body 6, and the other end of the adjustable conductor 3 is conductively connected to the conductive connector 2.

[0035] In order to ensure that the adjustable conductor 3 has a sufficient cross-sectional area and good flexural deformation ability, the length-diameter ratio of the adjustable conductor 3 needs to be larger, and its length is longer than that of the prior art, so the axial length of the housing 1 also needs to be longer. In this embodiment, the housing 1 has two parts, and the two parts are connected by a flange. Setting the housing 1 into two parts can reduce the manufacturing difficulty of the housing 1, and is conducive to modification based on the existing pressure resistance test equipment. In other embodiments, the housing 1 can of course also be an integrated structure.

[0036] See attached Figure 2 The conductive connector 2 includes a main body 21 and a threaded connection part 22. The threaded connection part 22 is formed with an external thread for threaded connection with the conductor on the GIS 7. A plug hole 23 is provided on the axial end face of the main body 21 away from the threaded connection part 22. The plug hole 23 is a round hole. The corresponding end of the adjustable conductor 3 is a plug-in part for plugging and matching with the plug hole 23. A contact finger groove 24 is provided near the hole in the plug hole 23. A spring contact finger for tightly matching with the plug-in part is provided in the contact finger groove 24.

[0037] The outer diameter of the main body 21 of the conductive connector 2 is greater than the outer diameter of the threaded connection part 22, so that a stop step 25 is formed at the connection between the main body 21 and the threaded connection part 22. The stop step 25 can cooperate with the corresponding conductor end face in GIS7. On the one hand, it can play a positioning role in the process of connecting the conductive connector 2 with the conductor of GIS7. On the other hand, it can also ensure that the threaded connection part 22 of the conductive connector 2 can maintain a certain force with the conductor of GIS7, thereby ensuring the stability of the conductive connector 2.

[0038] A hand hole 13 is provided on the side wall of one of the split parts of the housing 1. The position of the hand hole 13 corresponds to the position of the plug-in portion of the adjustable conductor 3, so as to facilitate the operator to install the conductive connector 2. A cover plate 4 for closing the hand hole 13 is provided at the hand hole 13. The cover plate 4 is connected to the housing 1 through a flange, so as to ensure that the housing 1 can form a closed structure without leaking insulating gas. A gas injection structure for injecting insulating gas into the housing 1 is provided on the other split part of the housing 1. This structure is a prior art and will not be described in detail here.

[0039] Before conducting a withstand voltage test, the shell 1 of the docking device is fixedly connected to the shell 1 of the equipment body 6 by bolts, and then the insulator of the GIS7 to be tested is fixedly connected to the shell 1 of the docking device; then the operator holds the conductive connector 2 and puts the conductive connector 2 on the plug-in part of the adjustable conductor 3; then the operator adjusts the position of the conductive connector 2 so that it is aligned with the corresponding conductor on the GIS7, and then screws the conductive connector 2 onto the corresponding conductor. After all the conductive connectors 2 are installed, check and clean each component, mainly clean the particulate dirt at the bottom of the shell 1, and then carry out gas treatment before the withstand voltage test. After the treatment is completed, the withstand voltage test can be carried out. During the above operation process, the conductive connector 2 can also be installed on the adjustable conductor 3 first, and then the GIS7 is connected to the shell 1, and finally the conductive connector 2 is connected to the corresponding conductor on the GIS7.

[0040] Compared with the prior art, the docking device can connect the conductive joint 2 with the conductors on the GIS7 one by one after the GIS7 is fixed, and the adjustable conductor 3 has a certain flexural deformation ability in the radial direction, which can ensure the one-time connection between the conductive joint 2 and the conductor on the GIS7, and does not require multiple adjustments, effectively shortening the preparation time before the withstand voltage test, shortening the withstand voltage test cycle, and improving the production efficiency of the GIS7. In addition, since the adjustable conductor 3 can be flexed and deformed in the radial direction, it can also be applied to different models of GIS7 products, reducing the investment in the withstand voltage test and reducing the production cost of the GIS7.

[0041] After the conductive connector 2 is installed in place, there is a certain distance between the bottom wall of the plug hole 23 on the conductive connector 2 and the end face of the plug-in portion of the adjustable conductor 3, and the distance is a redundant distance, which is greater than the axial dimension of the threaded connection portion 22. After the conductive connector 2 is put on the adjustable conductor 3, the end face of the plug-in portion of the adjustable conductor 3 needs to be close to the bottom wall of the plug hole 23, so that the conductive connector 2 is completely between the adjustable conductor 3 and the corresponding conductor of the GIS7, which is convenient for the installation of the conductive connector 2.

[0042] In the process of gradually screwing the threaded connection part 22 of the conductive joint 2 into the corresponding conductor on the GIS 7, the bottom wall of the jack 23 gradually moves away from the adjustable conductor 3. Finally, after the conductive joint 2 is installed in place, the distance between the bottom wall of the jack 23 and the end face of the plug-in part of the adjustable conductor 3 reaches the designed redundant distance. The redundant distance can facilitate the installation of the conductive joint 2 and ensure reliable electrical connection between the conductive joint 2 and the adjustable conductor 3 during the installation process.

[0043] The main body 21 of the conductive joint 2 is also provided with a wrench structure for cooperating with a wrench tool. The wrench structure is specifically a wrench hole 26 provided on the adjustable conductor 3 and for inserting the wrench tool. A plurality of wrench holes 26 are provided at intervals along the circumferential direction of the adjustable conductor 3. The wrench holes 26 connect the outer wall surface of the main body 21 of the conductive joint 2 and the inner wall surface of the jack 23. The wrench structure can be provided to facilitate the operator to rotate and screw in the conductive joint 2, and the wrench structure is provided as a wrench hole 26 to avoid the risk of protrusions on the outer surface of the conductive joint 2 and the generation of tip discharge. In other embodiments, the wrench structure can also be a wrench groove. The wrench structure can also be omitted when it is convenient to screw in the conductive joint 2.

[0044] The end of the adjustable conductor 3 away from the conductive joint 2 is fixedly connected to a transfer body 5, see the attached Figure 3 , the length direction of the adapter 5 is perpendicular to the length direction of the adjustable conductor 3, one end of the adapter 5 in the length direction is fixedly connected to the adjustable conductor 3, and the other end is fixedly connected to the corresponding conductor on the equipment body 6 of the withstand voltage test equipment by four bolts. For different models of GIS7, when the arrangement position of the conductors changes greatly, the adapter 5 can be replaced, so that the withstand voltage test equipment has strong versatility and reduces the cost of the withstand voltage test. In one implementation of this embodiment, the adapter 5 is welded and fixed to the adjustable conductor 3, thereby providing a stable support for the adjustable conductor 3 and ensuring the stability and reliability of the adjustable conductor 3; in other implementations, the adapter 5 can also be connected to the adjustable conductor 3 by means of threads, which is convenient for disassembling and replacing the adapter 5. If the model of the GIS7 product produced is relatively single, the adapter 5 can also be omitted, and the adjustable conductor 3 can be directly fixedly connected to the corresponding conductor on the equipment body 6.

[0045] Specific embodiment 2 of the pressure test equipment provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that no finger groove is provided in this embodiment, and electrical connection is achieved between the conductive connector and the plug-in portion by pressing the plug-in portion against the inner wall of the slot through a top screw radially installed on the conductive connector.

[0046] Specific embodiment 3 of the pressure test equipment provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that, in this embodiment, the jack is arranged at one axial end of the adjustable conductor. In order to make the jack and the plug-in portion have a larger plug-in contact area, it is necessary to enlarge the diameter of the corresponding end of the adjustable conductor to form a sleeve-like structure. The main body of the conductive joint in this embodiment is a plug-in portion of a solid columnar structure.

[0047] Specific embodiment 4 of the pressure test equipment provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that, in this embodiment, no redundant spacing is provided between the end face of the plug-in portion and the bottom wall of the plug-in hole. In this embodiment, the GIS and the docking device are connected by first installing the conductive connector on the corresponding conductor on the GIS, and then docking the GIS with the outer shell of the docking device. During the docking process, the operator manually moves each adjustable conductor to align the adjustable conductor with the corresponding conductive connector, thereby facilitating smooth docking of the adjustable conductor with the corresponding conductive connector.

[0048] Specific embodiment 5 of the pressure test equipment provided by the present invention: This embodiment is based on embodiment 1, and the difference from embodiment 1 is that, see attached Figure 4 The main body 21 of the conductive connector 2 in this embodiment includes two parts that rotate with each other and are conductively connected, one of which is a connecting sleeve 211 for plugging with the adjustable conductor 3. The inner hole of the connecting sleeve 211 includes a plug section and a connecting section, wherein the plug section constitutes a plug hole 23, and both the plug section and the connecting section are provided with a finger groove 24. The other part is a rod 212 inserted in the connecting section of the connecting sleeve 211, and the rod 212 is coaxially fixedly connected with the threaded connecting part 22.

[0049] When in use, the conductive connector 2 can be installed on the corresponding conductor of the GIS7 first, and then after the GIS7 is connected to the housing 1, the operator aligns the plug-in portion of the adjustable conductor 3 with the sleeve through the hand hole 13, and then pushes the connecting sleeve 211 axially to make the connecting sleeve 211 sleeved on the adjustable conductor 3, completing the docking of the conductive connector 2 and the adjustable conductor 3. Of course, the connecting sleeve 211 can also be sleeved on the adjustable conductor 3 first, and then after the GIS7 is connected to the housing 1, the connecting sleeve 211 is pushed and sleeved on the rod 212.

[0050] In this embodiment, the plug-in section of the inner hole of the connecting sleeve 211 may be non-circular, such as an elliptical or rectangular structure, and the corresponding cross-sectional shape of the adjustable conductor 3 may also be non-circular to match the shape of the plug-in section.

[0051] Specific embodiments of the docking device for GIS pressure test provided by the present invention: The docking device used for the GIS pressure test is the docking device described in any one of Examples 1 to 5 of the above-mentioned pressure test equipment, which will not be described in detail here.

[0052] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A docking device for GIS withstand voltage test, comprising a shell, a withstand voltage conductor and a conductive joint, wherein the shell is provided with a withstand voltage test connection port for connecting to a device body of the withstand voltage test device and a GIS connection port for connecting to a GIS, one end of the withstand voltage conductor is used for conductive connection to the device body of the withstand voltage test device, the other end of the withstand voltage conductor is conductively connected to the conductive joint, and the end of the conductive joint away from the adjustable conductor is a threaded connection portion for connecting to the conductor of the GIS, wherein: The withstand voltage conductor is an adjustable conductor capable of flexural deformation. The shell is also provided with a hand hole for disassembling and assembling the conductive joint, and a cover plate for closing the hand hole is provided at the hand hole.

2. The docking device for GIS pressure test according to claim 1 is characterized in that: One of the adjustable conductor and the conductive joint is provided with a plug hole, and the other is provided with a plug-in portion which is plugged and matched with the plug hole.

3. The docking device for GIS pressure test according to claim 2 is characterized in that: The jack is a round hole.

4. The docking device for GIS pressure test according to claim 2 or 3, characterized in that: When in use, there is a redundant spacing between the end face of the plug-in portion and the bottom wall of the hole of the plug-in hole, and the redundant spacing is greater than the axial length of the threaded connection portion.

5. The docking device for GIS pressure test according to claim 2 or 3, characterized in that: The jack is arranged on the conductive joint, the adjustable conductor is a structure with a constant cross section in the length direction, and one end of the adjustable conductor in the length direction is a plug-in portion.

6. The docking device for GIS pressure test according to claim 2 or 3, characterized in that: A contact finger groove is arranged on the inner wall of the plug hole, and a spring contact finger used for tightly matching with the plug-in part is arranged in the contact finger groove.

7. The docking device for GIS pressure test according to claim 2 or 3, characterized in that: The adjustable conductor is provided with a wrench structure for cooperating with a wrench tool.

8. The docking device for GIS pressure test according to claim 7 is characterized in that: The wrenching structure is a wrenching hole arranged on the adjustable conductor and for inserting a wrenching tool. At least two wrenching holes are arranged at intervals along the outer circumference of the adjustable conductor.

9. The docking device for GIS pressure test according to any one of claims 1 to 3, characterized in that the One end of the conductor away from the conductive joint is fixedly connected to a adapter, the length direction of the adapter is perpendicular to the length direction of the adjustable conductor, one end of the adapter in the length direction is connected to the adjustable conductor, and the other end is used to connect to the corresponding conductor on the equipment body of the voltage withstand test equipment.

10. A pressure test device, comprising a device body and a docking device arranged at the interface of the device body, characterized in that: The docking device is a docking device for GIS pressure resistance test as described in any one of claims 1 to 9.

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