Double-bus high-voltage cabinet

Abstract

The utility model discloses a double-bus high-voltage cabinet, which comprises a first bus chamber and a second bus chamber, the bottoms of the first bus chamber and the second bus chamber are riveted with an isolating switch chamber, and the left side and the right side of the inner cavity of the isolating switch chamber are respectively and fixedly connected with a first switch operating mechanism and a second switch operating mechanism. The opposite sides of the first switch operation mechanism and the second switch operation mechanism are fixedly connected with a first bus isolation switch and a second bus isolation switch respectively. According to the utility model, the two groups of high-voltage horizontal main buses, the two bus power supply switching devices and the five-prevention linkage are designed, and the original bus chamber is changed into the double-isolation switch chamber, so that the requirement of the installation positions of the two isolation switches can be met, the requirement of the installation space of the double main buses designed at the top can also be met, and meanwhile, the internal space of the power distribution cabinet is not wasted; the size is small under the condition that the installation space is met.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage switch cabinets, in particular to a double-bus high-voltage cabinet. Background Technique

[0002] A high-voltage switch cabinet refers to an electrical product that plays roles such as switching on and off, controlling, or protecting in the processes of power generation, transmission, distribution, power conversion, and consumption in a power system, with a voltage level ranging from 3.6 kV to 550 kV, and is an important device for distributing and controlling a power system.

[0003] Today, with the rapid development of technology and the continuous increase in electricity consumption, people require stronger operability and more stable performance of electrical equipment. Therefore, generally two-way power supplies are designed for power sources now. In a two-way power supply system, there is often a situation where the electricity consumption of the equipment powered by the two-way power supplies is unbalanced. When using one-way power supply, the electric power of this one-way cannot meet the power requirement of the power grid configuration. Only when both ways are used simultaneously can the requirement be met. When both ways are used simultaneously, there is often a situation where the load on one side exceeds the designed power while the load on the other side does not reach the designed power. In this case, it is necessary to adjust the load on the overloaded side to the non-overloaded side. According to the normal design, it is impossible to predict the absolute balance of using the two-way loads. The prediction can only be relative. Therefore, during use, it is necessary to be able to adjust the usage state of the load power supply at any time, that is, to be able to adjust the power supply orientation, whether it is taken from the first power supply or the second power supply. To solve the above technical problems, a double-bus high-voltage cabinet is designed accordingly. Content of the Utility Model

[0004] The purpose of the utility model is to provide a double-bus high-voltage cabinet, which has the advantages of being able to quickly switch the power supply orientation, freely select the distribution power supply, realizing that both two-way power supplies are arranged in the same switch cabinet and simultaneously supplying power to the feeder power supply, and solves the problems that the power supply cannot be selected according to the power size of each load and the load is unbalanced during use.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A double-bus high-voltage cabinet includes a first bus chamber and a second bus chamber. The bottoms of the first bus chamber and the second bus chamber are riveted with a disconnector chamber. On the left and right sides of the inner cavity of the disconnector chamber, a first switch operating mechanism and a second switch operating mechanism are respectively fixedly connected. On the opposite sides of the first switch operating mechanism and the second switch operating mechanism, a first bus disconnector and a second bus disconnector are respectively fixedly connected. The bottom of the disconnector chamber is riveted with a cable chamber. At the top and bottom on the right side of the inner cavity of the cable chamber, contact boxes are respectively fixedly connected. At the bottom on the left side of the inner cavity of the cable chamber, a current transformer is fixedly connected. On the right sides of the disconnector chamber and the cable chamber, a relay chamber and a circuit breaker chamber are respectively riveted. The rear side at the bottom on the right side of the relay chamber penetrates and is movably connected with an operating mechanism main shaft. On the left side of the inner cavity of the circuit breaker chamber, a circuit breaker body is fixedly connected.

[0007] Preferably, an arrester is connected to the bottom of the inner cavity of the cable chamber by bolts, and an earthing switch is connected to the right side of the inner cavity of the cable chamber by bolts. The output ends of the contact boxes are respectively bidirectionally electrically connected to the arrester and the earthing switch.

[0008] Preferably, a spare chamber is riveted to the bottom on the right side of the cable chamber. A partition plate is fixedly connected between the first bus chamber and the second bus chamber. The output ends of the contact boxes are respectively electrically connected to the first switch operating mechanism and the second switch operating mechanism. The output ends of the first switch operating mechanism and the second switch operating mechanism are respectively electrically connected to the first bus chamber and the second bus chamber.

[0009] Preferably, the copper bars in the first bus chamber and the second bus chamber are connected to the copper bars in the high-voltage cabinet body through wall bushings. The first bus disconnector is connected to the first bus chamber through a connecting copper bar.

[0010] Preferably, the second bus disconnector is connected to the second bus chamber through a connecting copper bar. The lower ports of the first bus disconnector and the second bus disconnector are connected through a connecting copper bar.

[0011] Preferably, on the right side of the surface of the operating mechanism main shaft, an operating mechanism and a circuit breaker interlock and an operating mechanism handle interlock are respectively fixedly sleeved. The surface of the operating mechanism main shaft is respectively fixedly connected to the first bus isolator and the second bus isolator.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] Based on the original single main busbar cabinet of the in - center high - voltage switchgear cabinet, the utility model designs a double main busbar switchgear cabinet, with two groups of high - voltage horizontal main busbars, two busbar power switching devices and five - prevention interlocks. The original busbar chamber is changed into a double disconnector chamber, which can meet the requirements for the installation positions of two disconnectors and the installation space for the double main busbars designed at the top. At the same time, it does not waste the internal space of the switchgear cabinet and realizes a relatively small volume while meeting the installation space requirements. The top of the switchgear cabinet is designed with dual - busbar power supply. During use, the power source can be selected according to the power of each load, achieving a balance in use and solving the problem of unbalanced load during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the utility model;

[0015] Figure 2 is a right - hand view of the structure of the utility model;

[0016] Figure 3 is of the utility model Figure 2 an enlarged view of A.

[0017] In the figure: 1. First busbar chamber; 2. Second busbar chamber; 3. First busbar disconnector; 4. First switch operating mechanism; 5. Second busbar disconnector; 6. Second switch operating mechanism; 7. Contact box; 8. Interlock between operating mechanism and circuit breaker; 9. Circuit breaker body; 10. Current transformer; 11. Lightning arrester; 12. Earthing switch; 13. Interlock of operating mechanism handle; 14. Main shaft of operating mechanism; 15. Disconnector chamber; 16. Relay chamber; 17. Cable chamber; 18. Circuit breaker chamber; 19. Spare chamber. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Please refer to Figures 1 - 3, a double-bus high-voltage cabinet, comprising a first bus chamber 1 and a second bus chamber 2. The bottoms of the first bus chamber 1 and the second bus chamber 2 are riveted with a disconnector chamber 15. On the left and right sides of the inner cavity of the disconnector chamber 15, a first switch operating mechanism 4 and a second switch operating mechanism 6 are respectively fixedly connected. Both the first switch operating mechanism 4 and the second switch operating mechanism 6 are bevel gear mechanisms, and the operation of the disconnector is carried out through the meshing transmission of gears. The two switch mechanisms interact with each other, so that when rotating clockwise or counterclockwise, one switch operates and the other switch locks its position, achieving mechanical interlock, ensuring that only one switch is closed in the incoming line or feeder cabinet at the same time, and one switch is opened in the bus-coupler cabinet at the same time. On the opposite sides of the first switch operating mechanism 4 and the second switch operating mechanism 6, a first bus disconnector 3 and a second bus disconnector 5 are respectively fixedly connected. The bottom of the disconnector chamber 15 is riveted with a cable chamber 17. At the top and bottom on the right side of the inner cavity of the cable chamber 17, contact boxes 7 are respectively fixedly connected. At the bottom on the left side of the inner cavity of the cable chamber 17, a current transformer 10 is fixedly connected. On the right sides of the disconnector chamber 15 and the cable chamber 17, a relay chamber 16 and a circuit breaker chamber 18 are respectively riveted. The rear side at the bottom on the right side of the relay chamber 16 is movably connected through the operation mechanism main shaft 14. On the left side of the inner cavity of the circuit breaker chamber 18, a circuit breaker body 9 is fixedly connected. By setting the circuit breaker body 9, the power supply of the disconnector chamber 15 and the cable chamber 17 can be connected to form a circuit controlled by the circuit breaker body 9;

[0019] Please refer to Figure 1 , a lightning arrester 11 is bolted to the bottom of the inner cavity of the cable chamber 17. By setting the lightning arrester 11, the safe operation of high-voltage equipment can be effectively protected, and the lightning resistance and anti-interference ability of high-voltage equipment can be enhanced. A grounding switch 12 is bolted to the right side of the inner cavity of the cable chamber 17. By setting the grounding switch 12, when a failure occurs in the high-voltage electrical equipment, the equipment can be grounded, thus avoiding the danger of electric shock. The output ends of the contact box 7 are respectively bidirectionally electrically connected to the lightning arrester 11 and the grounding switch 12;

[0020] Please refer to Figure 1 , a spare chamber 19 is riveted to the bottom on the right side of the cable chamber 17. By setting the spare chamber 19, it is convenient to install other electrical equipment in the future. A spacer is fixedly connected between the first bus chamber 1 and the second bus chamber 2. The output ends of the contact box 7 are respectively electrically connected to the first switch operating mechanism 4 and the second switch operating mechanism 6. The output ends of the first switch operating mechanism 4 and the second switch operating mechanism 6 are respectively electrically connected to the first bus chamber 1 and the second bus chamber 2;

[0021] Please refer to Figure 1 , the copper bars in the first bus chamber 1 and the second bus chamber 2 are connected to the copper bars in the high-voltage cabinet body through wall bushings. The first bus disconnector 3 and the first bus chamber 1 are connected through a wiring copper bar;

[0022] Please refer toFigure 1 The second busbar disconnector 5 is connected to the second busbar chamber 2 through a connecting copper bar, and the lower ports of the first busbar disconnector 3 and the second busbar disconnector 5 are connected through a connecting copper bar;

[0023] Please refer to Figure 1 and Figure 2 On the right side of the surface of the operating mechanism main shaft 14, an operating mechanism - breaker interlock 8 and an operating mechanism handle interlock 13 are respectively fixedly sleeved, and the surface of the operating mechanism main shaft 14 is fixedly connected to the first busbar disconnector 3 and the second busbar disconnector 5 respectively.

[0024] During use, the first busbar chamber 1 and the second busbar chamber 2 respectively carry two - way power supplies of the power grid. There is a double - layer steel plate separating the first busbar chamber 1 and the second busbar chamber 2. There is one insulator fixed on the front and back of the steel plate to fix and support the main busbar copper bar. There are two insulators fixed at the front and back positions of the first busbar chamber 1 and the second busbar chamber 2 respectively to fix and support the main busbar copper bar; the busbars between the first busbar chamber 1 and the second busbar chamber 2 are symmetrically distributed, which is beneficial for leading down to the disconnector chamber 15, facilitating fabrication and maintenance. There are six through - wall bushings opened on the partition between the disconnector chamber 15 and the busbar chamber, three between the first busbar chamber 1 and the first busbar disconnector 3; three between the second busbar chamber 2 and the second busbar disconnector 5. The first busbar chamber 1 corresponds to the first busbar disconnector 3, and the second busbar chamber 2 corresponds to the second busbar disconnector 5. The busbar is connected to the incoming - line stud of the corresponding disconnector and the main busbar of the busbar chamber through the through - wall bushing; both the first busbar disconnector 3 and the second busbar disconnector 5 are installed in the disconnector chamber 15. The operating shaft of the first busbar disconnector 3 is connected to the operating mechanism main shaft 14 through the first switch operating mechanism 4; the operating shaft of the second busbar disconnector 5 is connected to the operating mechanism main shaft 14 through the second switch operating mechanism 6. The operating mechanism main shaft 14 operates the two disconnectors by rotation. Both the first switch operating mechanism 4 and the second switch operating mechanism 6 are bevel - gear mechanisms, and both have an operating position where the mechanism gears mesh and a locking position of the mechanism disk. When the circuit - breaker body 9 is in the isolation position, the disconnector operating handle, under the action of the main shaft rotation, operates the disconnector. After the disconnector operation is completed, the operating handle is removed, and the circuit - breaker body 9 is cranked in. When the circuit - breaker body 9 is cranked away from the isolation position to the insertion position, the operating mechanism handle interlock 13 closes the handle operation port, and the handle cannot be inserted into the operation hole, and the disconnector cannot be operated anymore, preventing the operation of the disconnector when the circuit - breaker body 9 is in the closed state, achieving the function of five - prevention for high - voltage equipment. At the same time, the operating mechanism - breaker interlock 8 acts to lock the operating mechanism main shaft 14, preventing its rotational operation. At the same time, the disconnector handle also cannot be inserted into the operating mechanism main shaft 14 to operate the disconnector. To operate the disconnector, the circuit - breaker body 9 must be switched off and cranked to the isolation position before operation.

[0025] In summary, for the double-bus high-voltage switchgear, through the combined use of the first bus chamber 1, the second bus chamber 2, the first bus disconnector 3, the first switch operating mechanism 4, the second bus disconnector 5, the second switch operating mechanism 6, the interlock between the operating mechanism and the circuit breaker 8, the circuit breaker body 9, and the interlocks 13 and 14 of the operating mechanism handle and the main shaft of the operating mechanism, the problems of being unable to select the power supply according to the power of each load and load imbalance during use are solved.

[0026] The above is only the preferred embodiment of the present invention, and it is not a limitation to the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A double busbar high voltage cabinet, comprising a first busbar chamber (1) and a second busbar chamber (2), characterized in that: The bottom of the first busbar chamber (1) and the second busbar chamber (2) are riveted with an isolating switch chamber (15); the left and right sides of the inner cavity of the isolating switch chamber (15) are respectively fixedly connected with a first switch operating mechanism (4) and a second switch operating mechanism (6); the first busbar isolating switch (3) and the second busbar isolating switch (5) are respectively fixedly connected to the opposite side of the first switch operating mechanism (4) and the second switch operating mechanism (6); the bottom of the isolating switch chamber (15) is riveted with a cable chamber (17); The top and bottom of the right side of the inner cavity of the cable chamber (17) are fixedly connected to a contact box (7), the bottom of the left side of the inner cavity of the cable chamber (17) is fixedly connected to a current transformer (10), the right sides of the isolating switch chamber (15) and the cable chamber (17) are riveted to a relay chamber (16) and a circuit breaker chamber (18) respectively, the rear side of the right side bottom of the relay chamber (16) is movably connected to an operating mechanism main shaft (14), and the left side of the inner cavity of the circuit breaker chamber (18) is fixedly connected to a circuit breaker body (9).

2. A double busbar high voltage cabinet according to claim 1, characterized in that: The bottom of the inner cavity of the cable chamber (17) is connected to a lightning arrester (11) by bolts, the right side of the inner cavity of the cable chamber (17) is connected to a grounding switch (12) by bolts, and the output end of the contact box (7) is bidirectionally electrically connected to the lightning arrester (11) and the grounding switch (12) respectively.

3. A double busbar high voltage cabinet according to claim 1, characterized in that: A spare chamber (19) is riveted to the bottom of the right side of the cable chamber (17); a partition plate is fixedly connected between the first bus chamber (1) and the second bus chamber (2); the output end of the contact box (7) is electrically connected to the first switch operating mechanism (4) and the second switch operating mechanism (6), respectively; and the output ends of the first switch operating mechanism (4) and the second switch operating mechanism (6) are electrically connected to the first bus chamber (1) and the second bus chamber (2), respectively.

4. A double busbar high voltage cabinet according to claim 1, characterized in that: The copper bars in the first busbar chamber (1) and the second busbar chamber (2) are connected to the copper bars in the high-voltage cabinet via wall bushings, and the first busbar disconnector (3) is connected to the first busbar chamber (1) via a wiring copper bar.

5. The double busbar high voltage cabinet according to claim 1, characterized in that: The second busbar disconnector (5) is connected to the second busbar chamber (2) via a wiring copper busbar, and the lower ports of the first busbar disconnector (3) and the second busbar disconnector (5) are connected via a connecting copper busbar.

6. A double busbar high voltage cabinet according to claim 1, characterized in that: The right side of the surface of the operating mechanism main shaft (14) is respectively fixedly sleeved with an operating mechanism and circuit breaker interlock (8) and an operating mechanism handle interlock (13), and the surface of the operating mechanism main shaft (14) is respectively fixedly connected to the first busbar disconnector (3) and the second busbar disconnector (5).

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