Electric grounding switch interlocking structure

Abstract

The utility model relates to the technical field of grounding switches, and particularly discloses an electric grounding switch interlocking structure which comprises a main shaft, a sleeve, a first hinge plate, a first cam, a second cam, a third cam, a fourth cam, a pulling assembly, a first mounting assembly and a second mounting assembly. The casing pipe is arranged in the middle of the main shaft in a sleeved mode, the first hinge plate is fixedly connected with the casing pipe and located on the outer side of the casing pipe, the pulling assembly is hinged to the first hinge plate, and the first cam, the second cam, the third cam and the fourth cam are sequentially arranged on the outer side of the main shaft in a sleeved mode. And safe operation of a power system and safety of maintenance personnel are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of grounding knives, in particular to an electric grounding knife interlocking structure. Background Art

[0002] High-voltage switchgear is an electrical equipment for power distribution, control and protection. The main function of high-voltage switchgear is to open and close, control and protect electrical equipment in the process of power generation, transmission, distribution and power conversion in the power system. The components inside the high-voltage switchgear mainly include circuit breakers, disconnectors, load switches, operating mechanisms, mutual inductors and various protective devices. In order to prevent residual current in the high-voltage switchgear from injuring people or backflowing electricity during the maintenance of the high-voltage switchgear, a grounding knife switch is usually added inside the high-voltage switchgear to protect the safety of people and equipment.

[0003] However, the existing grounding knife switch must be operated on-site in the high-voltage switch cabinet. If the grounding knife is closed or powered on with the grounding knife turned on, it is difficult to ensure the safe operation of the power system and the safety of maintenance personnel. Utility Model Content

[0004] The purpose of the utility model is to provide an electric grounding knife interlocking structure, which aims to solve the technical problem in the prior art that the grounding knife switch must be operated on-site in the high-voltage switch cabinet. If the grounding knife is erroneously operated while the power is on or the power is supplied with the grounding knife, it is difficult to ensure the safe operation of the power system and the safety of the maintenance personnel.

[0005] To achieve the above-mentioned purpose, the utility model adopts an electric grounding knife interlocking structure, including a main shaft, a sleeve, a first hinged plate, a first cam, a second cam, a third cam, a fourth cam, a pulling assembly, a first mounting assembly and a second mounting assembly. The two ends of the main shaft are respectively rotatably connected to the first mounting assembly and the second mounting assembly. The sleeve is sleeved on the middle part of the main shaft, the first hinged plate is fixedly connected to the sleeve and is located on the outside of the sleeve, the pulling assembly is hinged to the first hinged plate, and the first cam, the second cam, the third cam and the fourth cam are sequentially sleeved on the outside of the main shaft.

[0006] Wherein, the pulling assembly includes a circular ring, a second hinge plate and a connecting piece, the connecting piece is hinged to the first hinge plate, the second hinge plate is hinged to the connecting piece, and the circular ring is fixedly connected to the second hinge plate.

[0007] Wherein, the connecting member includes a first U-shaped frame, a second U-shaped frame and a connecting rod, the first U-shaped frame is sleeved on one end of the first hinged plate and hinged to the first hinged plate, the second U-shaped frame is sleeved on one end of the second hinged plate and hinged to the second hinged plate, one end of the connecting rod is fixedly connected to the first U-shaped frame, and the other end of the connecting rod is fixedly connected to the second U-shaped frame.

[0008] The first mounting assembly includes a fixing frame and a motor. The fixing frame is rotatably connected to the main shaft, and the motor is arranged on the inner side of the fixing frame.

[0009] The second mounting assembly includes an L-shaped plate and a limiting ring. The L-shaped plate is rotatably connected to the main shaft. The limiting ring is sleeved on the outside of the main shaft and fits against one side of the L-shaped plate.

[0010] Wherein, the circular ring has a clamping groove.

[0011] Wherein, the L-shaped plate has two circular holes.

[0012] The utility model provides an electric grounding knife interlocking structure. When it is used, the main shaft is installed in the high-voltage switch cabinet through the first installation component and the second installation component, and then the main shaft of the grounding knife is connected to the pulling component. Then, the main shaft is driven to rotate by the first installation component, and the main shaft drives the sleeve to rotate, and the sleeve drives the first hinged plate to rotate. The first hinged plate pulls the pulling component, and the pulling component drives the main shaft of the grounding knife to rotate, thereby opening and closing the grounding knife. When the live indicator detects that the cable is live, it will lock the closing of the grounding knife, thereby preventing the grounding knife from being closed when the cable is live, avoiding short circuit faults and arc burning. When the grounding knife is closed, the baffle on the guide rail and the block under the guide rail will extend to the high-voltage switch The trolley cannot be moved from the test position to the working position, thereby ensuring that even if the grounding knife is in the closed state, power cannot be supplied, thereby ensuring the safety of maintenance personnel. The circuit breaker trolley can only be pulled out or pushed into the working position when the circuit breaker is in the open state, ensuring that the circuit breaker trolley will not be moved when under load, avoiding equipment damage or system failure. This method can effectively solve the problem in the prior art that the grounding knife switch must be operated on-site in the high-voltage switch cabinet. If the grounding knife is closed or the power is supplied with the grounding knife under power, it is difficult to ensure the safe operation of the power system and the safety of maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 It is a structural diagram of the present utility model.

[0015] Figure 2 It is a three-dimensional diagram of the present utility model.

[0016] Figure 3 It is a partial structural diagram of the utility model.

[0017] Figure 4 It is a partial structural diagram of the utility model.

[0018] 101-main shaft, 102-sleeve, 103-first hinge plate, 104-first cam, 105-second cam, 106-third cam, 107-fourth cam, 108-circular ring, 109-slot, 110-second hinge plate, 111-first U-shaped frame, 112-second U-shaped frame, 113-connecting rod, 114-fixed frame, 115-motor, 116-L-shaped plate, 117-circular hole, 118-limiting ring. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0020] See also Figures 1 to 4 ,in Figure 1 It is a structural diagram of the utility model. Figure 2 It is a three-dimensional diagram of the utility model. Figure 3 This is a partial structural diagram of the utility model. Figure 4 It is a partial structural diagram of the utility model.

[0021] The utility model provides an electric grounding knife interlocking structure, comprising a main shaft 101, a sleeve 102, a first hinged plate 103, a first cam 104, a second cam 105, a third cam 106, a fourth cam 107, a pulling assembly, a first mounting assembly and a second mounting assembly, wherein the two ends of the main shaft 101 are rotatably connected to the first mounting assembly and the second mounting assembly respectively, the sleeve 102 is sleeved on the middle part of the main shaft 101, the first hinged plate 103 is fixedly connected to the sleeve 102 and is located on the outside of the sleeve 102, the pulling assembly is hinged to the first hinged plate 103, and the first cam 104, the second cam 105, the third cam 106 and the fourth cam 107 are sleeved on the outside of the main shaft 101 in sequence.

[0022] In this embodiment, the main shaft 101 is installed in the high-voltage switch cabinet through the first installation component and the second installation component, and then the main shaft of the grounding knife is connected to the pulling component. Then, the main shaft 101 is driven to rotate by the first installation component, and the main shaft 101 drives the sleeve 102 to rotate, and the sleeve 102 drives the first hinged plate 103 to rotate. The first hinged plate 103 pulls the pulling component, and the pulling component drives the main shaft of the grounding knife to rotate, thereby opening and closing the grounding knife. When the live indicator detects that the cable is live, it will lock the closing of the grounding knife switch, thereby preventing the grounding knife from being closed when the cable is live. To avoid short-circuit faults and arc burning, when the grounding knife is closed, the baffle on the guide rail and the block under the guide rail will extend into the high-voltage switch cabinet to prevent the trolley from being pushed into the running position. At the same time, the baffle of the guide rail interlock will also extend to push the grounding knife interlock plate in the chassis car into the chassis car. The interlock plate jams the upper limit switch of the lead screw, so that the trolley cannot be moved from the test position to the working position, thereby ensuring that even if the grounding knife is in the closed state, power cannot be supplied, thereby ensuring the safety of maintenance personnel. The circuit breaker trolley can only be pulled out or pushed into the working position when the circuit breaker is in the open state, ensuring that the circuit breaker trolley will not be moved when under load, avoiding equipment damage or system failure.

[0023] Furthermore, the pulling assembly includes a ring 108 , a second hinge plate 110 and a connecting piece, the connecting piece is hinged to the first hinge plate 103 , the second hinge plate 110 is hinged to the connecting piece, and the ring 108 is fixedly connected to the second hinge plate 110 .

[0024] In this embodiment, the main shaft of the grounding knife is inserted into the ring 108, the first hinge plate 103 rotates to drive the connecting member to move, the connecting member pulls the second hinge plate 110, and the second hinge plate 110 drives the ring 108 to move, thereby causing the main shaft of the grounding knife to rotate.

[0025] Furthermore, the connecting member includes a first U-shaped frame 111, a second U-shaped frame 112 and a connecting rod 113. The first U-shaped frame 111 is sleeved on one end of the first hinged plate 103 and hinged to the first hinged plate 103. The second U-shaped frame 112 is sleeved on one end of the second hinged plate 110 and hinged to the second hinged plate 110. One end of the connecting rod 113 is fixedly connected to the first U-shaped frame 111, and the other end of the connecting rod 113 is fixedly connected to the second U-shaped frame 112.

[0026] In this embodiment, the first hinge plate 103 drives the first U-shaped frame 111 to move, the first U-shaped frame 111 drives the second U-shaped frame 112 to move via the connecting rod 113 , and the second U-shaped frame 112 drives the second hinge plate 110 to move.

[0027] Furthermore, the first mounting assembly includes a fixing frame 114 and a motor 115 . The fixing frame is rotatably connected to the main shaft 101 , and the motor 115 is disposed on the inner side of the fixing frame 114 .

[0028] In this embodiment, one end of the main shaft 101 is mounted in a high-voltage switch cabinet via a fixing bracket 114 , and the main shaft 101 is driven to rotate via an output end of the motor 115 .

[0029] Furthermore, the second mounting assembly includes an L-shaped plate 116 and a limiting ring 118 . The L-shaped plate 116 is rotatably connected to the main shaft 101 . The limiting ring 118 is sleeved on the outside of the main shaft 101 and fits against one side of the L-shaped plate 116 .

[0030] In this embodiment, one end of the main shaft 101 is installed in the high-voltage switch cabinet through the L-shaped plate 116 , and the main shaft 101 is limited by the limiting ring 118 .

[0031] Furthermore, the ring 108 has a slot 109 .

[0032] In this embodiment, the main shaft of the grounding knife is inserted into the slot 109 .

[0033] Furthermore, the L-shaped plate 116 has two circular holes 117 .

[0034] In this embodiment, the two circular holes 117 are provided to facilitate the use of bolts to fix the L-shaped plate 116 and the high-voltage switch cabinet.

[0035] The beneficial effects of the present utility model are as follows: one end of the main shaft 101 is installed in the high-voltage switch cabinet through the fixing frame 114, and the other end of the main shaft 101 is installed in the high-voltage switch cabinet through the L-shaped plate 116, and then the main shaft of the grounding knife is inserted into the slot 109, and the output end of the motor 115 is linked with the main shaft 101, and the main shaft 101 is driven to rotate by the output end of the motor 115, and the main shaft 101 drives the sleeve 102 to rotate, and the sleeve 102 drives the first hinged plate 103 to rotate, and the first hinged plate 103 drives the first U-shaped frame 111 to move, and the first U-shaped frame 111 drives the second U-shaped frame 112 to move through the connecting rod 113, and the second U-shaped frame 112 drives the second hinged plate 110 to move, and the second hinged plate 110 drives the ring 108 to move, so that the main shaft of the grounding knife rotates, thereby opening and closing the grounding knife, and when the live indicator detects that the cable is live, it will lock. The closing of the grounding knife switch prevents the grounding knife from being closed when the cable is energized, avoiding short-circuit faults and arc burning. When the grounding knife is closed, the baffle on the guide rail and the block under the guide rail will extend into the high-voltage switch cabinet to prevent the trolley from being pushed into the operating position. At the same time, the baffle of the guide rail interlock will also extend, pushing the grounding knife chain plate in the chassis car into the chassis car. The chain plate jams the upper limit switch of the lead screw, making it impossible for the trolley to move from the test position to the working position, thereby ensuring that even if the grounding knife is in the closed state, power cannot be supplied, thereby ensuring the safety of maintenance personnel. The circuit breaker trolley can only be pulled out or pushed into the working position when the circuit breaker is in the open state, ensuring that the circuit breaker trolley will not be moved when under load, avoiding equipment damage or system failure. This method can effectively solve the problem in the existing technology that the grounding knife switch must be operated on-site in the high-voltage switch cabinet. If the grounding knife is closed under power or the grounding knife is supplied with power, it is difficult to ensure the safe operation of the power system and the safety of maintenance personnel.

[0036] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present invention are still within the scope of the utility model.

Claims

1. An electric grounding knife interlocking structure, characterized in that: It includes a main shaft, a sleeve, a first hinge plate, a first cam, a second cam, a third cam, a fourth cam, a pulling assembly, a first mounting assembly and a second mounting assembly. The two ends of the main shaft are rotatably connected to the first mounting assembly and the second mounting assembly respectively. The sleeve is sleeved on the middle part of the main shaft. The first hinge plate is fixedly connected to the sleeve and is located on the outside of the sleeve. The pulling assembly is hinged to the first hinge plate. The first cam, the second cam, the third cam and the fourth cam are sleeved on the outside of the main shaft in sequence.

2. The electric grounding knife interlocking structure according to claim 1, characterized in that: The pulling assembly includes a circular ring, a second hinge plate and a connecting piece. The connecting piece is hinged to the first hinge plate, the second hinge plate is hinged to the connecting piece, and the circular ring is fixedly connected to the second hinge plate.

3. The electric grounding knife interlocking structure according to claim 2, characterized in that: The connecting member includes a first U-shaped frame, a second U-shaped frame and a connecting rod. The first U-shaped frame is sleeved on one end of the first hinged plate and hinged to the first hinged plate. The second U-shaped frame is sleeved on one end of the second hinged plate and hinged to the second hinged plate. One end of the connecting rod is fixedly connected to the first U-shaped frame, and the other end of the connecting rod is fixedly connected to the second U-shaped frame.

4. The electric grounding knife interlocking structure according to claim 3, characterized in that: The first mounting assembly includes a fixing frame and a motor. The fixing frame is rotatably connected to the main shaft, and the motor is arranged on the inner side of the fixing frame.

5. The electric grounding knife interlocking structure according to claim 4, characterized in that: The second mounting assembly includes an L-shaped plate and a limiting ring. The L-shaped plate is rotatably connected to the main shaft. The limiting ring is sleeved on the outside of the main shaft and fits against one side of the L-shaped plate.

6. The electric grounding knife interlocking structure according to claim 5, characterized in that: The circular ring has a locking groove.

7. The electric grounding knife interlocking structure according to claim 6, characterized in that: The L-shaped plate has two circular holes.

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