Pressure-resistant tool

Abstract

The invention belongs to an electrical property testing device, and particularly relates to a voltage-withstanding tool. In order to solve the technical problems that a withstand voltage device in the prior art cannot carry out withstand voltage tests on three phases of a bus shaped like a Chinese character'pin 'at the same time and cannot carry out withstand voltage tests on a line-shaped bus and a bus shaped like a Chinese character'pin' at the same time. The pressure-resistant tool comprises an inlet four-way joint, the left end and the right end of the inlet four-way joint are each connected with an isolating switch, the downstream of the inlet four-way joint is connected with at least two transfer four-way joints which are connected in series, and the left end and the right end of each transfer four-way joint are each connected with an isolating switch; each isolating switch is connected with a switching cylinder used for being connected with a bus, and the switching cylinders on the left isolating switch and the right isolating switch are arranged corresponding to interfaces of a line-shaped bus and a delta-shaped bus respectively. Through the first switching cylinder and the second switching cylinder, voltage withstanding tests can be carried out on the line-shaped bus and the delta-shaped bus at the same time.

Description

Technical Field

[0001] The present invention belongs to a test device for electrical properties, and particularly relates to a withstand voltage tooling. Background Art

[0002] In a substation, GIS equipment is usually connected to overhead lines and GIS intervals through busbars. When performing a withstand voltage test on the busbars of GIS equipment, a withstand voltage tooling is required.

[0003] The Chinese utility model patent with the authorization announcement number CN220105200U and the authorization announcement date of November 28, 2023 discloses a multi-port withstand voltage device for GIS busbars, as Figure 1 shown. The withstand voltage device includes an inlet four-way 41, one end of the inlet four-way 41 is a voltage source connection end for connecting a voltage source; first disconnecting switches 21 are connected to both the left and right ends of the voltage source connection end of the inlet four-way 41, a transfer four-way 42 is connected to the first disconnecting switches 21, a second disconnecting switch 22 is connected to the end of the transfer four-way 42 opposite to the end connected to the first disconnecting switch 21, and a busbar to be tested 1 is connected to the second disconnecting switch 22. Transfer tees 3 can also be connected to the two ends of the transfer four-way 42 adjacent to the end connected to the first disconnecting switch 21, a second disconnecting switch 22 is connected to the transfer tees 3, and a busbar to be tested 1 is connected to the second disconnecting switch 22, so as to expand the number of busbars to be tested that can be withstand voltage tested at one time by the transfer tees 3.

[0004] When performing a withstand voltage test using the above withstand voltage device, the first disconnecting switches 21 can be closed or opened according to the actual situation, so as to test the busbars to be tested 1 on at least one side of the inlet four-way 41; on the side where the inlet four-way 41 is connected to the first disconnecting switches 21, when the first disconnecting switches 21 are closed, the busbars to be tested 1 connected to different second disconnecting switches 22 can be tested by controlling the closing or opening of the second disconnecting switches 22. However, in the above withstand voltage device, only single-group busbars or the three phases of a straight-line busbar can be withstand voltage tested simultaneously, the three phases of a delta-shaped busbar cannot be withstand voltage tested simultaneously, and even more, the straight-line busbar and the delta-shaped busbar cannot be withstand voltage tested simultaneously.

[0005] Meanwhile, in the above withstand voltage device, the transfer four-ways 42 on the left and right sides of the inlet four-way 41 are connected in parallel. In order to achieve separate withstand voltage testing for each group of busbars, each group of busbars corresponds to a transfer four-way 42 or a transfer tee 3. In addition, an inlet four-way 41 and two first disconnecting switches 21 that are not directly connected to the busbars to be tested 1 through a disconnecting switch are additionally provided, resulting in a relatively complex structure and a large floor area of the withstand voltage device. Summary of the Invention

[0006] The object of the present invention is to provide a withstand voltage tooling to solve the technical problems in the prior art that the inlet four-way and the transfer four-way in the withstand voltage equipment are connected in parallel, and one transfer four-way or transfer three-way is only used to connect a group of busbars to be tested, resulting in a complex structure, a large floor area, and the inability to perform a withstand voltage test on the three phases of the triangular busbars simultaneously, let alone perform a withstand voltage test on the linear busbars and the triangular busbars simultaneously.

[0007] To achieve the above object, the technical solution of the withstand voltage tooling provided by the present invention is as follows:

[0008] A withstand voltage tooling includes an inlet four-way. The inlet four-way has a voltage source connection end. Isolating switches are connected to both the left and right ends of the inlet four-way. At least two mutually series-connected transfer four-ways are connected downstream of the inlet four-way. Isolating switches are connected to both the left and right ends of the transfer four-way. Alternatively, one transfer four-way and one transfer three-way are connected downstream of the inlet four-way. Isolating switches are connected to both the left and right ends of the transfer four-way and the transfer three-way; at least three isolating switches on the left side and at least three isolating switches on the right side are connected with transfer cylinders for connecting to the busbars. The arrangements of the transfer cylinders on the isolating switches on the left and right sides respectively correspond to the interfaces of the linear busbars and the triangular busbars.

[0009] Furthermore, the transfer cylinder on the isolating switch on the right side is a second transfer cylinder. The second transfer cylinder includes a left cylinder, a middle cylinder, and a right cylinder. At least one section of the left cylinder extends to the left, and at least one section of the right cylinder extends to the right to avoid interference between the left cylinder, the middle cylinder, and the right cylinder; the left cylinder and the right cylinder are at the same height, the middle cylinder is higher than the left cylinder and the right cylinder, and one ends of the left cylinder, the middle cylinder, and the right cylinder are located in the same vertical plane and form a connection end for the triangular busbars.

[0010] Furthermore, the inlet four-way and the transfer four-way are the same four-way cylinder body.

[0011] Furthermore, a sealing end plate is provided at one end of the lowermost transfer four-way away from the inlet four-way.

[0012] Furthermore, input conductors are sequentially inserted and connected in series in the inlet four-way and the transfer four-way.

[0013] Furthermore, a shielding ball is provided at one end of the transfer conductor for connecting the isolating switch and the busbar away from the corresponding busbar.

[0014] The beneficial effects of the voltage withstand tooling of the present invention are as follows: The present invention is an improved invention. The voltage source connection terminal of the inlet four-way can be connected to the voltage source, so that the voltage source powers the voltage withstand tooling; connecting the transfer four-way downstream of the inlet four-way can make the voltage withstand tooling have scalability. Isolating switches are provided at both the left and right ends of the inlet four-way, the transfer four-way, and the transfer three-way. By controlling the number of transfer four-ways connected in series with the inlet four-way, the number of isolating switches in the entire voltage withstand tooling can be controlled; transfer cylinders with arrangement forms corresponding to the interfaces of the one-line busbar and the three-phase busbar in the shape of a product are respectively provided on the isolating switches on the left and right sides, so that the voltage withstand tooling can test the three phases of the one-line busbar and the three phases of the three-phase busbar in the shape of a product at the same time. By controlling the on-off of the corresponding isolating switches, each phase of the busbar can also be tested separately, or the three-phase busbar in the shape of a product can be tested separately. Compared with the voltage withstand equipment in the background technology, in the entire voltage withstand tooling of the present invention, each isolating switch is used to connect a group of busbars to be tested, and two isolating switches are connected to both the inlet four-way and the transfer four-way, that is, two groups of busbars to be tested are connected to both the inlet four-way and the transfer four-way, excluding the first isolating switch that is not connected to the busbar and the four-way cylinder that is not directly connected to the busbar through an isolating switch. Therefore, the voltage withstand tooling in the present invention has a simple structure, occupies a small area, and is conducive to the miniaturization of the voltage withstand tooling. When using the voltage withstand tooling in this embodiment, connect the voltage source connection terminal of the inlet four-way to the voltage source, and the voltage source powers the voltage withstand tooling. Connect the one-line busbar to be tested and the three-phase busbar in the shape of a product to the transfer cylinder. Then, disconnect all the isolating switches, turn on the voltage source, and close the isolating switch corresponding to the busbar to be tested that needs to be tested, ensuring that the remaining isolating switches are in the off state to conduct a voltage withstand test on the busbar. Description of the Drawings

[0015] Figure 1 It is a structural schematic diagram of the voltage withstand equipment in the prior art;

[0016] Figure 2 It is a structural schematic diagram of the voltage withstand tooling of the present invention from one angle;

[0017] Figure 3 It is a structural schematic diagram of the voltage withstand tooling of the present invention from another angle;

[0018] Figure 4 It is a structural schematic diagram of the voltage withstand tooling of the present invention before the second transfer cylinder is docked with the three-phase busbar in the shape of a product to be tested;

[0019] Figure 5 It is a structural schematic diagram of the voltage withstand tooling of the present invention after the second transfer cylinder is docked with the three-phase busbar in the shape of a product to be tested.

[0020] Description of the Reference Numerals:

[0021] 1. Busbar to be tested; 11. First transfer cylinder; 12. Second transfer cylinder; 121. Left cylinder; 122. Middle cylinder; 123. Right cylinder; 2. Disconnector; 21. First disconnector; 22. Second disconnector; 3. Middle transfer tee; 41. Inlet four-way; 42. Middle transfer four-way; 5. Transition cylinder; 6. Product-shaped busbar to be tested. Detailed implementation manner

[0022] The present invention will be further described in detail below in conjunction with embodiments.

[0023] Specific embodiment of the voltage withstand tooling provided by the present invention:

[0024] The main purpose of this embodiment is to provide a voltage withstand tooling. By setting an inlet four-way and a middle transfer four-way, two disconnectors and two groups of busbars are connected to one four-way cylinder, thereby simplifying the structure of the voltage withstand tooling and facilitating the miniaturization of the voltage withstand tooling; through the first transfer cylinder and the second transfer cylinder, it is possible to simultaneously test the linear busbar and the product-shaped busbar.

[0025] As Figures 2-5 shown, the voltage withstand tooling includes an inlet four-way 41. The inlet four-way 41 has a voltage source connection end. Disconnectors 2 are connected to both the left and right ends of the inlet four-way 41. At least two mutually connected in series middle transfer four-ways 42 are connected downstream of the inlet four-way 41. Disconnectors 2 are connected to both the left and right ends of the middle transfer four-way 42; at least three disconnectors 2 on the left side and at least three disconnectors 2 on the right side are connected with transfer cylinders for connecting with the busbars. The arrangements of the transfer cylinders on the left and right disconnectors 2 respectively correspond to the interfaces of the linear busbar and the product-shaped busbar. As Figure 2 shown, specifically, three of the disconnectors 2 on the left side are provided with a first transfer cylinder 11 for connecting with each phase of the same linear busbar, and three of the disconnectors 2 on the right side are provided with a second transfer cylinder 12 for connecting with each phase of the same product-shaped busbar.

[0026] Specifically, as Figure 2 shown, there are two middle transfer four-ways 42, so that there are three disconnectors 2 on each of the left and right sides respectively for connecting different phases of the busbar. Among them, the left side refers to the left side of the inlet four-way 41 and the middle transfer four-way 42; the right side refers to the right side of the inlet four-way 41 and the middle transfer four-way 42.

[0027] In other specific embodiments, a transfer four-way joint 42 and a transfer three-way joint 3 may also be connected downstream of the inlet four-way joint 41. Isolating switches 2 are connected to both the left and right ends of the transfer four-way joint 42 and the transfer three-way joint 3. In other specific embodiments, three of the isolating switches 2 on the left side may also be provided with second transfer cylinders 12 for connecting to the respective phases of the same triangular-shaped busbar, and three of the isolating switches 2 on the right side are provided with first transfer cylinders 11 for connecting to the respective phases of the same linear busbar; wherein, the left side refers to the left side of the inlet four-way joint 41, the transfer four-way joint 42, and the transfer three-way joint 3; the right side refers to the right side of the inlet four-way joint 41, the transfer four-way joint 42, and the transfer three-way joint 3.

[0028] When all the isolating switches 2 on the left side are closed, the three phases of the linear busbar can be tested simultaneously; when only one isolating switch 2 is closed, only one phase of the busbar can be tested. Similarly, when all the isolating switches 2 on the right side are closed, the three phases of the triangular-shaped busbar can be tested simultaneously; when only one isolating switch 2 is closed, only one phase of the busbar can be tested. Of course, in other specific embodiments, three, four, or other numbers of transfer four-way joints 42 can also be set as needed. When there are five transfer four-way joints 42, two sets of transfer cylinders can be set on the left side, and two sets of transfer cylinders can be set on the right side at the same time. The four sets of transfer cylinders can also correspond to two sets of linear busbars and two sets of triangular-shaped busbars, or can correspond to three sets of linear busbars and one set of triangular-shaped busbars. The specific setting of the transfer cylinders is not limited in this embodiment.

[0029] The voltage source connection terminal of the inlet four-way joint 41 can be connected to a voltage source, so that the voltage source supplies power to the withstand voltage tooling; a transfer four-way joint 42 is connected downstream of the inlet four-way joint 41, enabling the withstand voltage tooling to have scalability. Isolation switches 2 are provided at both the left and right ends of the inlet four-way joint 41, the transfer four-way joint 42, and the transfer three-way joint 3. By controlling the number of transfer four-way joints 42 connected in series with the inlet four-way joint 41, the number of isolation switches 2 in the entire withstand voltage tooling can be controlled; one of the first transfer cylinder body 11 and the second transfer cylinder body 12 is provided on three of the left isolation switches 2, and the other of the first transfer cylinder body 11 and the second transfer cylinder body 12 is provided on three of the right isolation switches 2, enabling the withstand voltage tooling to simultaneously test the three phases of a straight busbar and the three phases of a delta-shaped busbar. By controlling the on / off of the corresponding isolation switches 2, each phase of the busbar can also be tested individually, or the delta-shaped busbar can be tested alone. Compared with the withstand voltage equipment in the background technology, in the entire withstand voltage tooling of the present invention, each isolation switch 2 is used to connect a group of busbars to be tested, and two isolation switches 2 are connected to both the inlet four-way joint 41 and the transfer four-way joint 42, that is, two groups of busbars to be tested are connected to both the inlet four-way joint 41 and the transfer four-way joint 42, excluding the first isolation switch that is not connected to the busbar and the four-way joint cylinder body that is not directly connected to the busbar through an isolation switch. Therefore, the structure of the withstand voltage tooling in the present invention is simple, occupies a small area, and is conducive to the miniaturization of the withstand voltage tooling.

[0030] When using the withstand voltage tooling in this embodiment, connect the voltage source connection terminal of the inlet four-way joint 41 to the voltage source, and the voltage source supplies power to the withstand voltage tooling. Connect the straight busbar to be tested to the first transfer cylinder body 11, and connect the delta-shaped busbar to be tested to the second transfer cylinder body 12. Then, disconnect all the isolation switches 2, turn on the voltage source, and close the isolation switches 2 corresponding to the busbars to be tested that need to be tested, ensuring that the remaining isolation switches 2 are in the off state to conduct a withstand voltage test on the busbars.

[0031] As Figures 4-5 shown, the second transfer cylinder body 12 includes a left cylinder 121, a middle cylinder 122, and a right cylinder 123. At least one section of the left cylinder 121 extends to the left (blocked by the middle cylinder 122), and at least one section of the right cylinder 123 extends to the right (blocked by the middle cylinder 122) to prevent interference between the left cylinder 121, the middle cylinder 122, and the right cylinder 123; the left cylinder 121 and the right cylinder 123 are at the same height, the middle cylinder 122 is higher than the left cylinder 121 and the right cylinder 123, and one end of the left cylinder 121, the middle cylinder 122, and the right cylinder 123 is located in the same vertical plane and forms a connection end for the delta-shaped busbar to be used for connecting to the delta-shaped busbar 6 to be tested. At the same time, the distance between the isolation switch 2 corresponding to the left cylinder 121 and the connection end of the delta-shaped busbar is less than the distance between the isolation switch 2 corresponding to the right cylinder 123 and the connection end of the delta-shaped busbar, so the length of the left cylinder 121 is shorter.

[0032] However, in other specific embodiments, the second adapter cylinder body 12 can also extend to the right and approach each other to form a triangular bus connection end. Alternatively, the distance between the disconnecting switch 2 corresponding to the left cylinder 121 and the triangular bus connection end is greater than the distance between the disconnecting switch 2 corresponding to the right cylinder 123 and the triangular bus connection end, and the left cylinder 121 is longer.

[0033] As Figures 2-3 shown, for the convenience of busbars with different withstand voltages, as a specific embodiment, the voltage class of the disconnecting switch 2 satisfies: not less than the voltage class of the busbar to be tested. Specifically, a transition cylinder body 5 is connected between the disconnecting switch 2 and the first adapter cylinder body 11 or the second adapter cylinder body 12. The transition cylinder body 5 has a first connection end connected to the disconnecting switch 2 and a second connection end connected to the first adapter cylinder body 11 or the second adapter cylinder body 12.

[0034] Specifically, the voltage class of the disconnecting switch 2 is 420 kV. The first connection end of the transition cylinder body 5 is connected to the disconnecting switch 2 with a voltage class of 420 kV. The second connection end of the transition cylinder body 5 is used to connect to the busbar with a voltage class of 363 kV, that is, the second connection end of the transition cylinder body 5 is used to connect to the first adapter cylinder body 11 or the second adapter cylinder body 12 corresponding to the busbar with a voltage class of 363 kV. In other specific embodiments, the voltage class of the disconnecting switch 2 can also be 126 kV, and the voltage class of the corresponding busbar to be tested can be 126 kV, 96 kV or other voltage classes not greater than 126 kV; or, the voltage class of the disconnecting switch 2 can also be 252 kV or other voltage classes, and the voltage class of the corresponding busbar to be tested can be 252 kV, 126 kV, 96 kV or other voltage classes not greater than 252 kV. In this embodiment, the voltage class of the disconnecting switch 2 and the voltage class of the busbar to be tested are not limited. Through the transition cylinder body 5, the disconnecting switch 2 with the existing voltage class can be used to test busbars with different voltage classes as needed, and as long as it is ensured that the voltage class of the disconnecting switch 2 is greater than the voltage class of the busbar to be tested to ensure safety.

[0035] As Figure 2As shown, for the purpose of simplifying the structure, as a specific implementation, the inlet four-way joint 41 and the transfer four-way joint 42 are the same four-way cylinder body. Of course, in other specific implementations, the structures of the inlet four-way joint 41 and the transfer four-way joint 42 can also be different. For example, define the direction perpendicular to the left-right direction in the same horizontal plane as the front-back direction. Both the inlet four-way joint 41 and the transfer four-way joint 42 are symmetric structures in the front-back direction. The length of the inlet four-way joint 41 in the front-back direction is 0.8 times the length of the disconnector 2 in the front-back direction. At this time, if the lengths of the transfer four-way joint 42 and the inlet four-way joint 41 in the front-back direction are the same, it will be impossible to install the disconnector 2 on both the left and right sides of the transfer four-way joint 42. Therefore, the length of the transfer four-way joint 42 in the front-back direction is set to 1.3 times the length of the disconnector 2 in the front-back direction, so as to ensure that the disconnector 2 can be installed. In this embodiment, no restrictions are imposed on the structures of the inlet four-way joint 41 and the transfer four-way joint 42. By making the inlet four-way joint 41 and the transfer four-way joint 42 the same four-way cylinder body, when manufacturing the inlet four-way joint 41 and the transfer four-way joint 42, only one type of cylinder body needs to be manufactured, which is convenient for processing and manufacturing and has a low cost.

[0036] As Figure 2 As shown, to ensure the sealing of the transfer four-way joint 42 at the most downstream in the pressure-resistant tooling, as a specific implementation, a blocking end plate is provided at one end of the most downstream transfer four-way joint 42 away from the inlet four-way joint 41. The blocking end plate can ensure the sealing performance of the most downstream transfer four-way joint 42. At the same time, by removing the blocking end plate, it is convenient to increase the number of transfer four-way joints 42, thereby increasing the number of busbars that can be measured by the pressure-resistant tooling at one time.

[0037] Of course, in other specific implementations, a transfer three-way joint 3 is connected to one end of the most downstream transfer four-way joint 42 away from the inlet four-way joint 41. Disconnectors 2 are respectively connected to the opposite two ends of the transfer three-way joint 3. When increasing the number of transfer four-way joints 42, a new transfer four-way joint 42 needs to be added between the transfer three-way joint 3 and the transfer four-way joint 42 connected to the transfer three-way joint 3.

[0038] For the convenience of expanding the transfer four-way joint 42, as Figure 2 shown, there are input conductors inserted and connected in series in sequence in the inlet four-way joint 41 and the transfer four-way joint 42. Output conductors connected to the corresponding disconnectors 2 are connected to the left and right sides of the input conductors.

[0039] Of course, in other specific implementations, the electrical connection between the inlet four-way joint 41 and the transfer four-way joint 42 can also be achieved through insulating basins.

[0040] For the purpose of ensuring safety, as Figures 4-5As shown, a shielding ball is provided at one end of the transfer conductor in the second transfer cylinder body 12 for connecting the disconnector 2 and the busbar, which is away from the corresponding busbar. Of course, a shielding ball is also provided at one end of the transfer conductor in the first transfer cylinder body 11 for connecting the disconnector 2 and the busbar, which is away from the corresponding busbar.

[0041] When the voltage level of the withstand voltage test is relatively low, the shielding ball may not be provided on the transfer conductor.

[0042] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still make modifications to the technical solutions described in the foregoing embodiments without creative efforts, or make equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A voltage-resistant tooling, including an inlet four-way joint. The inlet four-way joint has a voltage source connection terminal, and disconnect switches are connected to both the left and right ends of the inlet four-way joint. It is characterized in that, Downstream of the inlet four-way is connected to at least two series-connected transfer four-ways. Isolating switches are connected to both the left and right ends of the transfer four-ways. Alternatively, downstream of the inlet four-way is connected to one transfer four-way and one transfer three-way. Isolating switches are connected to both the left and right ends of the transfer four-way and the transfer three-way. At least three isolating switches on the left side and at least three isolating switches on the right side are connected to transfer cylinders for connecting to the busbars. The arrangements of the transfer cylinders on the isolating switches on the left and right sides respectively correspond to the interfaces of the linear busbar and the delta-shaped busbar.

2. The voltage-resistant tooling according to claim 1, characterized in that, The transfer cylinder on the right-side isolating switch is the second transfer cylinder. The second transfer cylinder includes a left cylinder, a middle cylinder, and a right cylinder. At least one section of the left cylinder extends to the left, and at least one section of the right cylinder extends to the right to avoid interference between the left cylinder, the middle cylinder, and the right cylinder. The left cylinder and the right cylinder are at the same height. The middle cylinder is higher than the left cylinder and the right cylinder. One ends of the left cylinder, the middle cylinder, and the right cylinder are in the same vertical plane and form a connection end for the delta-shaped busbar.

3. The voltage-resistant tooling according to claim 1 or 2, characterized in that, The inlet four-way and the transfer four-way are the same four-way cylinder.

4. The voltage-resistant tooling according to claim 1 or 2, characterized in that, A sealing end plate is provided at the end of the lowermost transfer four-way away from the inlet four-way.

5. The voltage-resistant tooling according to claim 1 or 2, characterized in that, Input conductors are sequentially inserted and connected in series in the inlet four-way and the transfer four-way.

6. The voltage-resistant tooling according to claim 1 or 2, characterized in that, A shielding ball is provided at the end of the transfer conductor in the transfer cylinder for connecting the isolating switch and the busbar, which is away from the corresponding busbar.

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