Test tool for voltage withstanding test of floor tank type circuit breaker

Abstract

The utility model belongs to the technical field of electrical performance testing devices, and particularly relates to a testing tool for a withstand voltage test of a floor tank type circuit breaker. The test tool comprises a bent cylinder, two ends of the bent cylinder are respectively provided with a sealing butt joint structure, an inner cavity of the bent cylinder is provided with a bent conductor assembly, and the axis of one end of the bent cylinder, which is in sealing connection with the port of the output end of the withstand voltage test device, is parallel to the ground. And the bent conductor assembly comprises a first conductor arranged in the first linear section of the bent cylinder and a second conductor arranged in the second linear section of the bent cylinder and detachably and electrically connected with the first conductor. The sealing performance and the insulating performance in the testing process are guaranteed, meanwhile, the two conductors can be assembled separately in the assembling process, the circuit breaker can be assembled with the voltage withstanding testing device through the testing tool by adopting parallel assembling, and the problems that in the voltage withstanding testing process, the requirement for the height of a plant in a testing area is high, and the operation difficulty in the installation process is large are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical performance testing devices, in particular to a testing tool for a floor-standing tank circuit breaker withstand voltage test. Background Art

[0002] The floor-standing tank type sulfur hexafluoride circuit breaker product consists of a circuit breaker, a current transformer and a gas-filled bushing. In order to fully ensure the performance of the circuit breaker, it is necessary to conduct an insulation test verification (i.e., a withstand voltage test) under ultra-high voltage conditions in accordance with technical requirements before the product leaves the factory. Figure 1 As shown, the factory withstand voltage test is generally performed with an inflatable bushing 7 installed at the port of the input and output end of the floor-standing tank circuit breaker 6. The inflatable bushing 7 is electrically connected to the output end of the withstand voltage test device by a lead wiring method. This wiring method needs to fully consider the external insulation of the bushing. Therefore, the test area plant needs to be higher to meet the insulation distance, resulting in harsh test conditions. At the same time, during the installation of the bushing, the bushing needs to be installed at an inclined angle, which makes the installation process difficult to operate. Utility Model Content

[0003] The utility model provides a test fixture for a floor-standing tank type circuit breaker withstand voltage test, which solves the problems of high test area plant height requirement and difficult installation process in the prior art withstand voltage test.

[0004] In order to solve the above technical problems, the technical solution of the test tool for the withstand voltage test of the floor-standing tank circuit breaker of the present invention is as follows:

[0005] A test fixture for a floor-standing tank circuit breaker withstand voltage test, comprising a bent cylinder, with sealed docking structures provided at both ends of the bent cylinder for respectively sealingly connecting to ports at the input and output ends of the circuit breaker and ports at the output end of a withstand voltage test device; a bent conductor assembly is provided in the inner cavity of the bent cylinder, one end of the bent conductor assembly being used to electrically connect to the input and output ends of the circuit breaker, and the other end of the bent conductor assembly being used to electrically connect to the output end of the withstand voltage test device; the axis of the end of the bent cylinder that is sealedly connected to the port at the output end of the withstand voltage test device is parallel to the ground; the bent conductor assembly comprises a first conductor mounted in a first straight segment of the bent cylinder and a second conductor mounted in a second straight segment of the bent cylinder and detachably electrically connected to the first conductor.

[0006] The utility model improves the existing technology and provides a test fixture for the withstand voltage test of a floor-standing tank type circuit breaker. A sealed docking structure is provided at both ends of the bent cylinder, so that a sealed space is formed in the inner cavity of the bent cylinder. During the withstand voltage test, insulating gas is filled in the sealed space, which can ensure that the withstand voltage test fixture can achieve good sealing and insulation even if it is located at a position lower than the ground, without the need for a higher factory building to meet the insulation distance; and by setting the axis of one end of the bent cylinder that is sealed and connected to the port of the output end of the withstand voltage test device to be parallel to the ground, when the withstand voltage test device and the test fixture are assembled, parallel assembly can be used to achieve the assembly of the circuit breaker through the test fixture and the withstand voltage test device. During parallel assembly, only the height difference and coaxiality of the circuit breaker port and the test fixture port need to be considered, avoiding the problem of difficult operation in the installation process caused by the inclined angle installation in the prior art. Moreover, the test fixture and the withstand voltage test device are assembled in parallel, and can be achieved without the need for a higher test area factory building, which greatly reduces the difficulty of the withstand voltage test conditions.

[0007] When the test fixture provided by the present invention is in use, since the first conductor and the second conductor are detachably electrically connected, the two conductors can be assembled separately. The first conductor is first assembled in the inner cavity of the bent cylinder, and then the second conductor is electrically connected to the output end of the withstand voltage test device (or the input and output ends of the circuit breaker). Then, the bent cylinder equipped with the first conductor is used as an integral component, and one end is sealed and connected to the port of the input and output ends of the circuit breaker through a sealed docking structure. At the same time, the opposite ends of the first conductor and the second conductor in the cavity of the bent cylinder are docked, and the other end is sealed and connected to the output end port of the withstand voltage test device. The test fixture provided by the present invention is simple and efficient to use, and is convenient for operators to assemble.

[0008] Preferably, the bent conductor assembly includes a bent conductor and a straight conductor detachably electrically connected to the bent conductor, the bent conductor constitutes the first conductor, the straight conductor constitutes the second conductor, and the bending angle of the bent conductor is equal to the bending angle of the bent cylinder.

[0009] Preferably, the projected length of the first conductor in the axial direction does not exceed the diameter of the curved cylinder.

[0010] Preferably, an observation port is provided on the side wall of the curved cylinder corresponding to a position where the first conductor and the second conductor are detachably electrically connected.

[0011] Preferably, a first contact seat is provided at one end of the first conductor that is detachably electrically connected to the second conductor, and the second conductor is inserted into the first contact seat to achieve a detachable electrical connection between the two.

[0012] Preferably, the sealing docking structure provided at one end of the curved cylinder for sealingly connecting with the port of the output end of the withstand voltage testing device is an insulating basin.

[0013] Preferably, a connecting contact is provided on the side of the insulating basin close to the bent conductor assembly, and the connecting contact is used to connect to the bent conductor assembly. A second contact is provided on the side of the insulating basin away from the bent conductor assembly, and the connecting contact is connected to the second contact, and the second contact is used to connect to the output end of the withstand voltage test device.

[0014] Preferably, the sealing docking structure provided at one end of the bent cylinder for sealing connection with the port of the input and output terminals of the circuit breaker is a sealing flange, and the sealing flange is used for sealing connection with the insulating basin of the input and output terminals of the circuit breaker.

[0015] Preferably, the first straight segment and the second straight segment are welded at a certain angle to form the curved cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the assembly during the voltage withstand test in the prior art;

[0017] Figure 2 This is a schematic structural diagram of Example 1 of the test fixture for voltage withstand testing of floor-standing tank circuit breakers provided by the present invention;

[0018] In the accompanying drawings, 1. bent cylinder; 11. first straight segment; 12. second straight segment; 2. bent conductor assembly; 21. bent conductor; 22. straight conductor; 3. first contact seat; 4. first pot-type insulator; 41. connecting contact seat; 42. second contact seat; 5. output port of withstand voltage test device; 6. floor-standing tank circuit breaker; 61. input and output port of circuit breaker; 62. second pot-type insulator; 7. gas-filled bushing; 8. observation port. DETAILED DESCRIPTION

[0019] The technical concept of the test tool for the withstand voltage test of the floor-standing tank circuit breaker provided by the utility model is as follows:

[0020] A test fixture for a withstand voltage test of a floor-standing tank circuit breaker comprises a bent cylinder, with sealed docking structures provided at both ends of the bent cylinder for sealingly connecting to ports at the input and output ends of the circuit breaker and ports at the output end of a withstand voltage test device, respectively. The sealed docking structures are provided at both ends of the bent cylinder, so that a sealed space is formed in the inner cavity of the bent cylinder. During the withstand voltage test, insulating gas is filled into the sealed space, thereby ensuring that the withstand voltage test fixture can achieve good sealing and insulation even when located at a low distance from the ground, without requiring a higher factory building to meet the insulation distance.

[0021] A bent conductor assembly is provided in the inner cavity of the bent cylinder, one end of the bent conductor assembly is used to electrically connect to the input and output terminals of the circuit breaker, and the other end of the bent conductor assembly is used to electrically connect to the output terminal of the withstand voltage test device, ensuring that ultra-high voltage can be applied to the circuit breaker during the withstand voltage test.

[0022] The axis of one end of the bent cylinder that is sealed and connected to the port of the output end of the withstand voltage test device is parallel to the ground, and the bent conductor assembly includes a first conductor installed in the first straight section of the bent cylinder and a second conductor installed in the second straight section of the bent cylinder and detachably electrically connected to the first conductor. By setting the axis of one end of the bent cylinder that is sealed and connected to the port of the output end of the withstand voltage test device to be parallel to the ground, when the withstand voltage test device and the test fixture are assembled, parallel assembly can be used to realize the assembly of the circuit breaker through the test fixture and the withstand voltage test device. During parallel assembly, only the height difference and coaxiality of the circuit breaker port and the test fixture port need to be considered, thereby avoiding the problem of difficult operation during the installation process caused by the inclined angle installation in the prior art, and the test fixture and the withstand voltage test device are parallel. The test devices are assembled in parallel, which can be achieved without the need for a higher test area plant, greatly reducing the difficulty of the withstand voltage test conditions; in addition, a detachable electrical connection is provided between the first conductor and the second conductor. When the test tool is used, the two conductors can be assembled separately. The first conductor is first assembled in the inner cavity of the bent cylinder, and then the second conductor is electrically connected to the output end of the withstand voltage test device (or the input and output ends of the circuit breaker). Then, the bent cylinder equipped with the first conductor is used as an integral component, and one end is sealed and connected to the port of the input and output ends of the circuit breaker through a sealed docking structure. At the same time, the opposite ends of the first conductor and the second conductor in the cavity of the bent cylinder are docked, and the other end is sealed and connected to the output port of the withstand voltage test device. The method of use is simple and efficient, and it is convenient for operators to assemble.

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] 1. Specific embodiment of the test tool for the withstand voltage test of the floor-standing tank circuit breaker provided by the present utility model

[0025] Example 1

[0026] The test fixture provided in this embodiment for the withstand voltage test of a floor-standing tank circuit breaker is as follows: Figure 2As shown, sealed docking structures are provided at both ends of the bent cylinder 1 for sealed connection with the ports 61 of the input and output terminals of the circuit breaker and the port 5 of the output terminal of the withstand voltage test device. A bent conductor assembly 2 is provided in the inner cavity of the bent cylinder 1. One end of the bent conductor assembly 2 is used to electrically connect to the input terminal of the floor-standing tank circuit breaker 6, and the other end of the bent conductor assembly 2 is used to electrically connect to the output terminal of the withstand voltage test device. The axis of the end of the bent cylinder 1 that is sealed with the port 5 of the output terminal of the withstand voltage test device is parallel to the ground. The bent conductor assembly 2 includes a first conductor installed in a first straight section 11 of the bent cylinder and a second conductor installed in a second straight section 12 of the bent cylinder and detachably electrically connected to the first conductor.

[0027] This embodiment is described by taking the electrical connection between the first conductor and the output terminal of the withstand voltage test device as an example. Figure 2 As shown, it can be understood that the first conductor and the second conductor can both be straight conductors. In this case, the curved cylinder is formed by connecting the first straight segment and the second straight segment at a certain angle. The first conductor is coaxially assembled with the first straight segment, and the second conductor is coaxially assembled with the second straight segment. The two straight conductors are electrically connected at a certain angle. For example: the end of the first conductor connected to the second conductor is provided with a contact seat, and the opening direction of the contact seat is parallel to the second straight segment for plugging with the second conductor.

[0028] The bent conductor assembly 2 may also include a bent conductor 21 and a straight conductor 22 detachably electrically connected to the bent conductor 21. The bent conductor 21 constitutes the first conductor, and the straight conductor 22 constitutes the second conductor. The bending angle of the bent conductor 21 is equal to the bending angle of the curved cylindrical body 1. During assembly of the test fixture, after the bent conductor 21 is assembled with the curved cylindrical body 1, the straight conductor 22 is coaxially assembled with the second straight segment 12 of the curved cylindrical body 1, and the bent conductor 21 and the straight conductor 22 are butted against each other.

[0029] When the bent conductor 21 is assembled with the bent cylindrical body 1, if the axial projection length of the bent conductor 21 exceeds the diameter of the bent cylindrical body 1, the assembly of the bent conductor 21 and the bent cylindrical body 1 is difficult. In order to further facilitate the coaxial assembly of the bent conductor 21 and the bent cylindrical body 1, the axial projection length of the bent conductor 21 on the first straight segment 11 does not exceed the diameter of the bent cylindrical body 1.

[0030] Other partial structures not described in detail in this embodiment may be the same as the structures described in other embodiments in this document.

[0031] Example 2

[0032] The test fixture provided in this embodiment for the withstand voltage test of the floor-standing tank circuit breaker is as follows: Figure 2As shown, sealed docking structures are provided at both ends of the bent cylinder 1 for sealed connection with the ports 61 of the input and output terminals of the circuit breaker and the port 5 of the output terminal of the withstand voltage test device. A bent conductor assembly 2 is provided in the inner cavity of the bent cylinder 1. One end of the bent conductor assembly 2 is used to electrically connect to the input terminal of the floor-standing tank circuit breaker 6, and the other end of the bent conductor assembly 2 is used to electrically connect to the output terminal of the withstand voltage test device. The axis of the end of the bent cylinder 1 that is sealed with the port 5 of the output terminal of the withstand voltage test device is parallel to the ground. The bent conductor assembly 2 includes a first conductor installed in a first straight section 11 of the bent cylinder and a second conductor installed in a second straight section 12 of the bent cylinder and detachably electrically connected to the first conductor.

[0033] This embodiment also uses the electrical connection between the first conductor and the output terminal of the withstand voltage test device as an example for explanation. When the test fixture is assembled, the first conductor is installed in the inner cavity of the curved cylinder 1. After the second conductor is electrically connected to the input terminal of the floor-standing tank circuit breaker 6, the first conductor and the second conductor need to be connected. During the connection process, collisions may occur, which may affect the service life of the two conductor parts. The reliability and stability of the connection between the two conductor parts is one of the key factors affecting the withstand voltage test.

[0034] In order to further reduce the collision between the first conductor and the second conductor and to directly observe whether the connection is reliable, an observation port 8 is provided on the side wall of the curved cylinder 1 corresponding to the position where the first conductor and the second conductor are detachably connected. By providing the observation port 8, the connection status of the first conductor and the second conductor can be directly observed to ensure that no collision occurs during the connection process and a reliable connection is achieved.

[0035] When the first conductor and the second conductor are connected, an unstable connection problem is likely to occur. In order to further make the two parts of the conductor more stably connected, a first contact seat 3 is provided at one end where the first conductor and the second conductor can be detachably electrically connected. The second conductor is plugged into the first contact seat 3 to achieve a detachable electrical connection between the two. By providing the contact seat, the first conductor and the second conductor can achieve a more stable plug-in connection, and the conductor connection is more stable during testing.

[0036] The first conductor and the second conductor can also be connected by bolts. In this case, an operation port is opened on the side wall of the curved cylinder near the first conductor, and a sealing cover is provided for sealing the operation port. A first threaded hole is provided on the end face of the second conductor connected to the first conductor, and a second threaded hole coaxial with the first threaded hole is correspondingly provided inside the first conductor. After the test fixture is assembled, the operator passes the bolt through the second threaded hole from the operation port, and then tightens the bolt after passing through the first threaded hole to achieve the connection between the first conductor and the second conductor.

[0037] The problem of unstable sealing connection between the bent cylinder 1 and the port 5 at the output end of the withstand voltage test device is easy to occur. In order to further make the sealed connection between the bent cylinder 1 and the port 5 at the output end of the withstand voltage test device more stable, the sealed docking structure provided at one end of the bent cylinder 1 for sealing connection with the port 5 at the output end of the withstand voltage test device is an insulating basin, and the insulating basin is a first basin-type insulator 4. During assembly, the first basin-type insulator 4 is first assembled on one end of the bent cylinder 1. The side of the first basin-type insulator 4 facing away from the withstand voltage test device is electrically connected to the first conductor. The other end of the bent cylinder 1 is sealed and connected to the port 61 at the input and output end of the circuit breaker. After the end of the bent cylinder 1 equipped with the first basin-type insulator 4 is sealed and connected to the port 5 at the output end of the withstand voltage test device, a closed space (i.e., an air chamber) is formed. After checking that there is no abnormality, the air chamber is sealed and filled with insulating gas to ensure insulation stability during the withstand voltage test.

[0038] When the side of the insulating basin facing away from the voltage withstand test device is electrically connected to the first conductor, an unstable connection is likely to occur. To further ensure a stable electrical connection between the insulating basin and the first conductor, a connecting contact 41 is provided on the side of the insulating basin near the bent conductor assembly 2. The connecting contact 41 is used to connect to the bent conductor assembly 2. A second contact 42 is provided on the side of the insulating basin facing away from the bent conductor assembly 2. The connecting contact 41 is electrically connected to the second contact 42, and the second contact 42 is used to connect to the output terminal of the voltage withstand test device. The provision of connecting contact 41 ensures a stable electrical connection between the insulating basin and the first conductor, and the electrical connection between the first conductor and the output terminal of the voltage withstand test device is achieved through connecting contact 41, ensuring that the ultra-high voltage can be stably applied to the circuit breaker. The insulating basin is preferably a first basin-type insulator 4.

[0039] The sealed connection between the sealed docking structure of the curved cylinder 1 and the port 61 of the circuit breaker's inlet and outlet is relatively complex. To further simplify the connection between the sealed docking structure of the curved cylinder 1 and the port 61 of the circuit breaker's inlet and outlet, a sealing flange is provided at one end of the curved cylinder 1 for sealed connection with the port 61 of the circuit breaker's inlet and outlet. The sealing flange is used to seal the insulating basin of the circuit breaker's inlet and outlet ports. By providing the sealing flange, the inlet and outlet ports of the circuit breaker are provided with an insulating basin, which is a second basin-type insulator 62. The second basin-type insulator 62 and the sealing flange only need to be fixed by bolts to achieve a sealed connection, which is simple and efficient.

[0040] In order to further simplify the production process of the bent cylindrical body 1, the first straight segment 11 and the second straight segment 12 are non-coaxially welded to form the bent cylindrical body 1. When preparing the bent cylindrical body 1, the ends of the first straight segment 11 and / or the second straight segment 12 are cut off so that the cross-section of the end of the straight segment is at a certain angle to the axis. The bent cylindrical body 1 can be formed by welding two straight segments with a certain angle. According to the different curvature requirements of the bent cylindrical body 1, the end of the straight cylindrical body can be cut off so that the cross-section of the end of the straight cylindrical body is at a specific angle to the axis, which is simpler and more convenient.

[0041] Other partial structures not described in detail in this embodiment may be the same as the structures described in other embodiments in this document.

[0042] 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 has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A test fixture for a floor-standing tank circuit breaker withstand voltage test, characterized in that: It includes a bent cylinder, both ends of which are respectively provided with sealed docking structures for sealingly connecting with the ports of the input and output ends of the circuit breaker and the ports of the output end of the withstand voltage test device, and the inner cavity of the bent cylinder is provided with a bent conductor assembly, one end of the bent conductor assembly is used to electrically connect with the input and output ends of the circuit breaker, and the other end of the bent conductor assembly is used to electrically connect with the output end of the withstand voltage test device, the axis of the end of the bent cylinder that is sealed with the port of the output end of the withstand voltage test device is parallel to the ground, and the bent conductor assembly includes a first conductor installed in a first straight section of the bent cylinder and a second conductor installed in a second straight section of the bent cylinder and detachably electrically connected to the first conductor.

2. The test fixture for the withstand voltage test of a floor-standing tank circuit breaker according to claim 1, characterized in that: The bent conductor assembly includes a bent conductor and a straight conductor detachably electrically connected to the bent conductor. The bent conductor constitutes the first conductor, the straight conductor constitutes the second conductor, and the bending angle of the bent conductor is equal to the bending angle of the bent cylinder.

3. The test fixture for the withstand voltage test of a floor-standing tank circuit breaker according to claim 2, characterized in that: The projected length of the first conductor in the axial direction does not exceed the diameter of the curved cylinder.

4. The test fixture for the withstand voltage test of a floor-standing tank circuit breaker according to any one of claims 1 to 3, characterized in that: An observation port is provided on the side wall of the curved cylinder corresponding to a position where the first conductor and the second conductor are detachably connected.

5. The test fixture for the withstand voltage test of a floor-standing tank circuit breaker according to any one of claims 1 to 3, characterized in that: One end of the first conductor that is detachably electrically connected to the second conductor is provided with a first contact seat, and the second conductor is inserted into the first contact seat to achieve a detachable electrical connection between the two.

6. The test fixture for the withstand voltage test of a floor-standing tank circuit breaker according to any one of claims 1 to 3, characterized in that: The sealing docking structure provided at one end of the curved cylinder for sealingly connecting with the port of the output end of the pressure test device is an insulating basin.

7. The test fixture for the withstand voltage test of a floor-standing tank circuit breaker according to claim 6, characterized in that: A connecting contact is provided on the side of the insulating basin close to the bent conductor assembly, and the connecting contact is used to connect to the bent conductor assembly. A second contact is provided on the side of the insulating basin away from the bent conductor assembly, and the connecting contact is connected to the second contact, and the second contact is used to connect to the output end of the withstand voltage test device.

8. The test fixture for the withstand voltage test of a floor-standing tank circuit breaker according to any one of claims 1 to 3, characterized in that: The sealing docking structure provided at one end of the bent cylinder for sealing connection with the port of the input and output terminals of the circuit breaker is a sealing flange, and the sealing flange is used for sealing connection with the insulating basin of the input and output terminals of the circuit breaker.

9. The test fixture for the withstand voltage test of a floor-standing tank circuit breaker according to any one of claims 1 to 3, characterized in that: The first straight segment and the second straight segment are welded at a certain angle to form the curved cylinder.

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