Quick-plugging three-phase short circuit method

Abstract

The invention provides a quick-plugging three-phase short circuit method, which is characterized in that a short circuit board and three plugs plugged with a three-phase socket of power distribution equipment are arranged, and the three plugs are respectively connected with the short circuit board; the three-phase short circuit method comprises the following steps of: simultaneously inserting three plugs into a three-phase socket of the power distribution equipment, and locking the three plugs and the three-phase socket of the power distribution equipment in a buckling manner, so that the three plugs are inserted and electrically connected with the three-phase socket of the power distribution equipment; and meanwhile, the three plugs are short-circuited through the shared short-circuit board, so that the three-phase socket short-circuit of the power distribution equipment is realized. According to the quick-plugging three-phase short circuit method, the socket three-phase short circuit of the power distribution equipment can be quickly, conveniently and reliably realized, and the test requirement of three-phase short circuit during the test is met, so that the efficiency and convenience of the field test are improved. In addition, the three-phase short-circuit method can solve the problem of large occupied space caused by the adoption of the test cable, and can improve the safety and protection of the power distribution equipment test.

Description

Technical Field

[0001] The present invention relates to the technical field of power systems, and more particularly to a quick-plug three-phase short-circuiting method. Background Art

[0002] In power systems, newly designed and developed switchgear and distribution equipment, such as 10kV medium-voltage emergency power supply interface sets, must undergo testing and obtain type test reports or third-party certification before commissioning. For example, during dynamic thermal stability testing of distribution equipment with quick-disconnect functionality, such as 10kV medium-voltage emergency power supply interface sets, the quick-disconnect receptacles must be three-phase short-circuited in accordance with the test standard GB / T11022.

[0003] At present, three test cables are generally used to short-circuit the sockets of the distribution equipment into three phases. Each test cable is a section of cable, one end of which is equipped with a quick-plug plug for connecting to the socket of the distribution equipment, and the other end is crimped with a terminal. After the three test cables are respectively connected to the sockets of the distribution equipment, their terminal blocks are connected together with a copper busbar to achieve three-phase short-circuiting.

[0004] The above method has the following disadvantages: (1) The space at the socket interface of the power distribution equipment is limited, especially the depth dimension is generally about 200mm. When using a test cable to short-circuit the socket of the power distribution equipment into three phases, since the quick-plug plug has an aluminum shell, in order to facilitate installation and operation, the length of the test cable needs to be at least about 400mm. This exceeds the depth dimension of the cabinet at the interface, resulting in three test cables extending out of the cabinet door of the power distribution equipment, which not only increases the space occupied by the test, but also makes it impossible to close the cabinet door when the power distribution equipment is tested, thereby reducing the safety and protection of the power distribution equipment test.

[0005] (2) The method of short-circuiting three test cables is cumbersome. After the test cables are connected to the sockets through quick-plug plugs, they need to be crimped at the terminals and short-circuited using copper busbars, which greatly reduces the efficiency of on-site testing.

[0006] (3) The test cable is a soft part. When the three test cables are short-circuited, they need to be tied and fixed with a fixed support frame to prevent the influence of electric force on the test results. This not only greatly reduces the convenience of the test and further reduces the efficiency of the on-site test of the distribution equipment, but also increases the space occupied. Summary of the Invention

[0007] The present invention aims to overcome the shortcomings and deficiencies of the prior art by providing a quick-plug three-phase short-circuiting method. This method can quickly, conveniently, and reliably achieve three-phase short-circuiting of quick-plug sockets in power distribution equipment, meeting the testing requirements for three-phase short-circuiting during dynamic thermal stability tests, thereby improving the efficiency and convenience of on-site testing. Furthermore, this method can address the problem of large space requirements associated with the use of test cables, thereby improving the safety and protection of power distribution equipment testing.

[0008] In order to achieve the above object, the present invention is implemented by the following technical solution: a three-phase short-circuiting method with quick plug-in and pull-out, characterized in that: a short-circuiting plate and three plugs plugged into the three-phase sockets of the power distribution equipment are provided, and the three plugs are respectively connected to the short-circuiting plate; The three-phase short-circuiting method is as follows: three plugs are inserted into the three-phase sockets of the power distribution equipment at the same time, and the three plugs are locked with the three-phase sockets of the power distribution equipment by snapping, so that the three plugs are plugged in and electrically connected to the three-phase sockets of the power distribution equipment; at the same time, the three plugs are short-circuited through a common short-circuit board to realize the short-circuiting of the three-phase sockets of the power distribution equipment.

[0009] In the above scheme, the three-phase short-circuiting method of the present invention can quickly and conveniently achieve the three-phase short-circuiting of the power distribution equipment by plugging and locking the three plugs with the three-phase sockets of the power distribution equipment and short-circuiting through the short-circuiting plate. Compared with the traditional method of short-circuiting using test cables, the three-phase short-circuiting method of the present invention does not require on-site crimping of terminal blocks and short-circuiting of copper busbars, nor does it require the use of a support frame for binding and fixing, thereby improving the convenience of short-circuiting and the efficiency of on-site testing. In addition, the present invention adopts a small and rigid connection structure, which not only reduces the space occupied by the test, but also allows the power distribution equipment to be tested with the cabinet door closed to improve the safety and protection of the power distribution equipment test. Moreover, when the power distribution equipment is tested, the small and rigid connection structure is not easy to swing, thereby improving the stability of the plug-and-socket connection and the reliability of the socket short-circuiting.

[0010] Each plug includes a connector for being plugged and fixed into a socket and a pin assembly for being electrically connected to the socket; the connector of each plug is respectively connected to a short-circuit board; the pin assembly of each plug is arranged inside the connector and is respectively electrically connected to the short-circuit board; when the three plugs are plugged into a three-phase socket through the connector, one end of the pin assembly of each plug is electrically connected to the socket, and the other end is electrically connected through the short-circuit board, thereby realizing short-circuiting of the three-phase socket.

[0011] The present invention secures the plug assembly to the socket via a connector, allowing the plug assembly to be electrically connected to the three-phase sockets of the power distribution equipment. The plug assembly is then short-circuited via a shorting plate, allowing for rapid short-circuiting of the three phases of the sockets of the power distribution equipment. Furthermore, the present invention's three-phase short-circuiting method utilizes a compact and reasonable structure, requiring only a single shorting plate for short-circuiting, significantly reducing space requirements and making it particularly suitable for short-circuiting sockets in limited spaces.

[0012] Each socket is provided with a sleeve and a socket body with a socket, the sleeve is arranged inside the socket and connected to the socket body; each connector is provided with a cavity for avoiding the sleeve; the connector is connected and fixed to the socket by plugging into the socket, and the sleeve is located inside the cavity.

[0013] One end of the latch assembly is disposed inside the cavity, and the other end is electrically connected to the short-circuit board; Each socket is also provided with a conductive rod electrically connected to the power distribution equipment, and the conductive rod is arranged in the sleeve; when the connector is plugged into the socket, the plug assembly is inserted into the conductive rod to achieve electrical connection between the plug assembly and the socket.

[0014] The conductive rod is provided with a slot for the plug assembly to be inserted, and the side wall of the slot is provided with a watchband contact finger. The provision of the watchband contact finger of the present invention can improve the electrical connection between the conductive rod and the plug assembly.

[0015] A groove is provided on the outer side of the connector; the three plugs are locked with the three-phase socket of the power distribution equipment by snap-locking means that: the socket is also provided with a steel ball and a pushing component; when the connector is plugged into the three-phase socket, the steel ball is extended out of the socket and snap-locked with the groove by rotating the pushing component, thereby locking the connector and the three-phase socket; when the connector is pulled out, the steel ball is retracted and separated from the groove by resetting the pushing component, thereby pulling the connector out of the three-phase socket.

[0016] The socket body is provided with a through hole communicated with the socket, and a steel ball is arranged in the through hole; under the action of the pushing component, the steel ball extends out of the through hole or is reset.

[0017] The pushing assembly includes a sliding ring, a stop pin and a compression spring; the sliding ring is sleeved on the socket body and provided with a convex portion, one end of the compression spring abuts against the socket body and the other end abuts against the convex portion; the stop pin is provided on the socket body, and the sliding ring is provided with a slot for engaging with the stop pin; When the connector is plugged into the three-phase socket, the sliding ring is rotated to disengage the card slot and the stop pin. At this time, the sliding ring is moved backward by the force of the compression spring. At this time, the convex part of the sliding ring moves backward to the through hole. The convex part pushes the steel ball out of the through hole and snaps into the groove, thereby locking the connector and the three-phase socket. When the connector is pulled out, the sliding ring is pushed forward and the compression spring is compressed, causing the convex portion of the sliding ring to leave the through hole. The steel ball then retracts into the through hole and separates from the groove, allowing the connector to be pulled out of the three-phase socket. Rotating the sliding ring causes the locking groove to engage with the retaining pin. In the present invention, backward movement refers to movement away from the power distribution equipment, and forward movement refers to movement toward the power distribution equipment.

[0018] The present invention can quickly lock the connector and the socket or pull out the connector by operating the sliding ring. This method not only reduces the complexity of short-circuiting the distribution equipment, greatly improves the efficiency of on-site testing of the distribution equipment, but also improves the stability and reliability of the short-circuiting of the distribution equipment.

[0019] The latch assembly includes a latch, a connecting block, a fastener, and a hexagonal piece used to prevent the latch from rotating when secured. The latch is inserted through the hexagonal piece and the connecting block. After the latch passes through the shorting plate, the connecting block engages the shorting plate. The fastener connects to the latch extending from the shorting plate, locking the latch to the shorting plate. This design ensures a secure connection between the latch assembly and the shorting plate, ensuring a reliable electrical connection.

[0020] The plug also includes a screw; the connector is provided with a screw hole, and the connector is connected to the short-circuit board through the screw and the screw hole.

[0021] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. The quick-plug three-phase short-circuiting method of the present invention can quickly, conveniently and reliably realize the three-phase short-circuiting of the sockets of the power distribution equipment, meet the test requirements of the three-phase short-circuiting during the test, thereby improving the efficiency and convenience of the on-site test.

[0022] 2. The quick-plug three-phase short-circuiting method of the present invention can solve the problem of large space occupation caused by the use of test cables, and can improve the safety and protection of distribution equipment testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the connection between the plug, the shorting board and the three-phase socket of the power distribution equipment used in the three-phase shorting method of the present invention; Figure 2 This is a schematic diagram of the structure of the plug and short-circuit board used in the three-phase short-circuit method of the present invention. Figure 1 ; Figure 3 This is a schematic diagram of the structure of the plug and short-circuit board used in the three-phase short-circuit method of the present invention. Figure 2 ; Figure 4 Schematic diagram of a connector in a plug used in the three-phase short-circuiting method of the present invention; Figure 5 Schematic diagram of the socket of the power distribution equipment of the present invention Figure 1 ; Figure 6 Schematic diagram of the socket of the power distribution equipment of the present invention Figure 2 ; Among them, 1 is a short-circuit board, 2 is a power distribution device, 3 is a socket, 4 is a plug, 5 is a connector, 5.1 is a cavity, 5.2 is a screw hole, 5.3 is a groove, 6 is a pin assembly, 7 is a sleeve, 8 is a socket, 9 is a conductive rod, 10 is a strap contact, 11 is a pin, 12 is a connecting block, 13 is a hexagonal piece, 14 is a fastener, 15 is a guide cone, 16 is a screw, 17 is a steel ball, 18 is a socket body, 19 is a sliding ring, 19.1 is a protrusion, 20 is a stop pin, 21 is a compression spring, and 22 is a slot. DETAILED DESCRIPTION

[0024] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. Example

[0025] like Figures 1 to 6 As shown, the quick-plug three-phase short-circuiting method of the present invention is provided with a short-circuiting board 1 and three plugs 4 plugged into a three-phase socket 3 of a power distribution device 2, and the three plugs 4 are respectively connected to the short-circuiting board 1; The three-phase short-circuiting method is as follows: three plugs 4 are inserted into the three-phase sockets of the power distribution equipment 2 at the same time, and the three plugs 4 are locked with the three-phase sockets 3 of the power distribution equipment 2 by snapping, so that the three plugs 4 are plugged in and electrically connected to the three-phase sockets 3 of the power distribution equipment 2; at the same time, the three plugs 4 are short-circuited through the common short-circuit board 1 to realize the short-circuiting of the three-phase socket 3 of the power distribution equipment 2.

[0026] Specifically, each plug 4 includes a connector 5 for being plugged and fixed with the socket 3 and a pin assembly 6 for being electrically connected to the socket 3; the connector 5 of each plug 4 is respectively connected to the short-circuit board 1; the pin assembly 6 of each plug 4 is arranged inside the connector 5 and is respectively electrically connected to the short-circuit board 1; when the three plugs 4 are plugged with the three-phase socket 3 through the connector 5, one end of the pin assembly 6 of each plug 4 is electrically connected to the socket 3, and the other end is electrically connected through the short-circuit board 1, thereby short-circuiting the three-phase socket 3.

[0027] The present invention securely connects the connector 5 to the socket 3, allowing the plug assembly 6 to be electrically connected to each of the three-phase sockets 3 of the power distribution equipment 2. The plug assembly 6 is short-circuited via the shorting plate 1, thereby quickly achieving a three-phase short-circuit on the socket 3 of the power distribution equipment 2. Furthermore, the three-phase short-circuiting method of the present invention has a compact and reasonable structure, requiring only a single shorting plate 1 to achieve short-circuiting, significantly reducing space usage and making it particularly suitable for achieving three-phase short-circuiting of sockets in limited spaces.

[0028] Each socket 3 is equipped with a sleeve 7 and a socket body 18 with a socket 8. The sleeve 7 is disposed within the socket 8 and connected to the socket body 18. Each connector 5 defines a cavity 5.1 for receiving the sleeve 7. The connector 5 is fixedly connected to the socket 3 by plugging into the socket 8, with the sleeve 7 located within the cavity 5.1.

[0029] One end of the plug assembly 6 of the present invention is disposed within the cavity 5.1, and the other end is electrically connected to the shorting board 1. Each socket 3 is also equipped with a conductive rod 9 electrically connected to the power distribution equipment 2. The conductive rod 9 is disposed within the sleeve. When the connector 5 is plugged into the socket 3, the plug assembly 6 is inserted into the conductive rod 9, achieving electrical connection between the plug assembly 6 and the socket 3. To ensure a better electrical connection between the conductive rod 9 and the plug assembly 6, the conductive rod 9 of the present invention has a slot for the plug assembly 6 to be inserted, and the sidewalls of the slot are provided with watchband contacts 10.

[0030] The connector 5 of the present invention is provided with a groove 5.3 on its outer side. The aforementioned snap-locking of the three plugs 4 to the three-phase socket 3 of the power distribution equipment 2 involves: the socket 3 is further provided with a steel ball 17 and a push assembly. When the connector 5 is plugged into the three-phase socket 3, the push assembly is rotated to cause the steel ball 17 to extend out of the socket 8 and snap into the groove 5.3, thereby locking the connector 5 to the three-phase socket 3. When the connector 5 is removed, the push assembly is reset to cause the steel ball 17 to retract and separate from the groove 5.3, thereby removing the connector 5 from the three-phase socket 3.

[0031] Specifically, the socket body 18 defines a through hole communicating with the socket 8, within which a steel ball 17 is disposed. The push assembly causes the steel ball 17 to extend out of the through hole or return to its original position. The push assembly comprises a sliding ring 19, a stop pin 20, and a compression spring 21. The sliding ring 19 is sleeved around the socket body 18 and has a protrusion 19.1. One end of the compression spring 21 abuts against the socket body 18, while the other end abuts against the protrusion 19.1. The stop pin 20 is disposed on the socket body 18, and the sliding ring 19 has a slot 22 for engaging with the stop pin 20.

[0032] When the connector 5 is plugged into the three-phase socket 3, the sliding ring 19 is rotated to disengage the locking groove 22 from the stop pin 20. At this time, the sliding ring 19 moves backward due to the force of the compression spring 21. At this time, the convex portion 19.1 of the sliding ring 19 moves backward to the through hole. The convex portion 19.1 pushes the steel ball 17 out of the through hole and engages with the groove 5.3, thereby locking the connector 5 and the three-phase socket 3. When the connector 5 is pulled out, the sliding ring 19 is pushed forward and the compression spring 21 is compressed, causing the protrusion 19.1 of the sliding ring 19 to leave the through hole, and the steel ball 17 to retract into the through hole and separate from the groove 5.3, thereby removing the connector 5 from the three-phase socket 3. The sliding ring 19 is rotated so that the locking groove 22 engages the stop pin 20. In the present invention, backward movement refers to movement away from the power distribution device 2, and forward movement refers to movement toward the power distribution device 2.

[0033] The present invention can quickly lock the connector 5 and the socket 3 or pull out the connector 5 by operating the slip ring 19. This method not only reduces the complexity of short-circuiting the distribution equipment 2, greatly improves the on-site testing efficiency of the distribution equipment 2, but also improves the stability and reliability of the short-circuiting of the distribution equipment 2.

[0034] In addition, the latch assembly 6 of the present invention includes a latch 11, a connecting block 12, a fastener 14, and a hexagonal piece 13 for preventing the latch 11 from rotating when fixed. The latch 11 is inserted through the hexagonal piece 13 and the connecting block 12. After the latch 11 passes through the shorting plate 1, the connecting block 12 abuts against the shorting plate 1, and the fastener 14 connects with the latch 11 extending from the shorting plate 1, thereby locking the latch 11 to the shorting plate 1. This design ensures a stable connection between the latch assembly 6 and the shorting plate 1, ensuring a reliable electrical connection. To facilitate the insertion of the latch assembly 6, a guide cone 15 is provided at the top of the latch assembly 6.

[0035] The plug 4 of the present invention further includes a screw 16 , and the connector 5 is provided with a screw hole 5 . 2 . The connector 5 is connected to the short-circuit board 1 via the screw 16 and the screw hole 5 . 2 .

[0036] The three-phase short-circuiting method of the present invention can quickly and conveniently achieve the three-phase short-circuiting of the power distribution equipment 2 by plugging and locking the three plugs 4 with the three-phase sockets 3 of the power distribution equipment 2 and short-circuiting through the short-circuiting plate 1. Compared with the traditional method of short-circuiting using a test cable, the three-phase short-circuiting method of the present invention does not require on-site crimping of the terminal blocks and short-circuiting of the copper busbar, nor does it require the use of a support frame for binding and fixing, thereby improving the convenience of short-circuiting and the efficiency of on-site testing. In addition, the present invention adopts a small and rigid connection structure, which not only reduces the space occupied by the test, but also allows the power distribution equipment 2 to close the cabinet door for testing, thereby improving the safety and protection of the test of the power distribution equipment 2. Moreover, when the power distribution equipment 2 is tested, the small and rigid connection structure is not easy to swing, thereby improving the stability of the plug 4 and the socket 3 and the reliability of the short-circuiting of the socket 3.

[0037] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A quick plug-in three-phase short-circuiting method, characterized by: A short circuit board and three plugs connected to the three-phase sockets of the power distribution equipment are provided, and the three plugs are respectively connected to the short circuit board; The three-phase short-circuiting method is as follows: three plugs are inserted into the three-phase sockets of the power distribution equipment at the same time, and the three plugs are locked with the three-phase sockets of the power distribution equipment by snapping, so that the three plugs are plugged in and electrically connected to the three-phase sockets of the power distribution equipment; at the same time, the three plugs are short-circuited through a common short-circuit board to realize the short-circuiting of the three-phase sockets of the power distribution equipment.

2. The quick-plug three-phase short-circuiting method according to claim 1, characterized in that: Each plug includes a connector for being plugged and fixed into a socket and a pin assembly for being electrically connected to the socket; the connector of each plug is respectively connected to a short-circuit board; the pin assembly of each plug is arranged inside the connector and is respectively electrically connected to the short-circuit board; when the three plugs are plugged into a three-phase socket through the connector, one end of the pin assembly of each plug is electrically connected to the socket, and the other end is electrically connected through the short-circuit board, thereby realizing short-circuiting of the three-phase socket.

3. The quick-plug three-phase short-circuiting method according to claim 2, characterized in that: Each socket is provided with a sleeve and a socket body with a socket, the sleeve is arranged inside the socket and connected to the socket body; each connector is provided with a cavity for avoiding the sleeve; the connector is connected and fixed to the socket by plugging into the socket, and the sleeve is located inside the cavity.

4. The quick-plug three-phase short-circuiting method according to claim 3, characterized in that: One end of the latch assembly is disposed inside the cavity, and the other end is electrically connected to the short-circuit board; Each socket is also provided with a conductive rod electrically connected to the power distribution equipment, and the conductive rod is arranged in the sleeve; when the connector is plugged into the socket, the plug assembly is inserted into the conductive rod to achieve electrical connection between the plug assembly and the socket.

5. The quick-plug three-phase short-circuiting method according to claim 4, characterized in that: The conductive rod is provided with a slot for the pin assembly to be inserted into, and a watchband contact finger is provided on a side wall of the slot.

6. The quick-plug three-phase short-circuiting method according to claim 3, characterized in that: A groove is provided on the outer side of the connector; the three plugs are locked with the three-phase socket of the power distribution equipment by snap-locking means that: the socket is also provided with a steel ball and a pushing component; when the connector is plugged into the three-phase socket, the steel ball is extended out of the socket and snap-locked with the groove by rotating the pushing component, thereby locking the connector and the three-phase socket; when the connector is pulled out, the steel ball is retracted and separated from the groove by resetting the pushing component, thereby pulling the connector out of the three-phase socket.

7. The quick plug-in three-phase short-circuiting method according to claim 6, characterized in that: The socket body is provided with a through hole communicated with the socket, and a steel ball is arranged in the through hole; under the action of the pushing component, the steel ball extends out of the through hole or is reset.

8. The quick plug-in three-phase short-circuiting method according to claim 7, characterized in that: The pushing assembly includes a sliding ring, a stop pin and a compression spring; the sliding ring is sleeved on the socket body and provided with a convex portion, one end of the compression spring abuts against the socket body and the other end abuts against the convex portion; the stop pin is provided on the socket body, and the sliding ring is provided with a slot for engaging with the stop pin; When the connector is plugged into the three-phase socket, the sliding ring is rotated to disengage the card slot and the stop pin. At this time, the sliding ring is moved backward by the force of the compression spring. At this time, the convex part of the sliding ring moves backward to the through hole. The convex part pushes the steel ball out of the through hole and snaps into the groove, thereby locking the connector and the three-phase socket. When the connector is pulled out, the sliding ring is pushed forward and the compression spring is compressed, so that the convex part of the sliding ring leaves the through hole, and the steel ball retracts into the through hole and separates from the groove, so that the connector is pulled out from the three-phase socket; the sliding ring is rotated to lock the slot and the stop pin.

9. The quick plug-in three-phase short-circuiting method according to claim 2, characterized in that: The latch assembly includes a latch, a connecting block, a fastener, and a hexagonal piece for preventing the latch from rotating when fixing the latch; the latch is inserted into the hexagonal piece and the connecting block; after the latch passes through the short-circuit plate, the connecting block fits the short-circuit plate; the fastener is connected to the latch extending out of the short-circuit plate to lock the latch to the short-circuit plate.

10. The quick plug-in three-phase short-circuiting method according to claim 2, characterized in that: The plug also includes a screw; the connector is provided with a screw hole, and the connector is connected to the short-circuit board through the screw and the screw hole.

Images