Large-current switch cabinet conductive connection device with double-gas-tank structure and installation method of large-current switch cabinet conductive connection device

Abstract

The invention discloses a double-gas tank structure heavy current switch cabinet wall bushing conductive connection device and an installation method, the device comprises a first conductive connection unit, a second conductive connection unit and an outer side conductive connection unit, the first conductive connection unit is arranged on a gas tank, the second conductive connection unit is arranged on a circuit breaker, and the outer side conductive connection unit is arranged on the gas tank. The first conductive connection unit and the second conductive connection unit are connected and conducted, and the outer conductive connection unit is arranged on the periphery of the first conductive connection unit and the second conductive connection unit and is connected and fastened with the first conductive connection unit and the second conductive connection unit. According to the scheme, the conductive connection of the wall bushing and the circuit breaker in the gas tank is completed in a manner of firstly assembling and then connecting, the difficulties of multi-point fixation and large conductive current-carrying capacity of large-current switch equipment elements are overcome, the installation and connection of the conductive connection device are completed in the limited space of the gas tank, the installation labor intensity of the switch equipment is reduced, and the installation efficiency is improved. And the reliability of conductive connection of the switch equipment is improved.

Description

Technical Field

[0001] This invention relates to the field of mechanical manufacturing technology, specifically to a conductive connection device for a through-wall bushing of a high-current switchgear with a double-gas-box structure and its installation method. Background Technology

[0002] LSC2 type high-voltage switchgear refers to high-voltage switchgear with continuous operation function. When any accessible compartment of a functional unit is opened (except for the busbar compartment), all other functional units can continue to operate normally while energized. It features continuous operation, safety, and improved power supply reliability. LSC2 type high-voltage switchgear ensures continuous power supply to the power grid while also improving the safety and reliability of the power supply system.

[0003] Gas-insulated switchgear is a metal-enclosed switchgear and control equipment that uses a gas at a pressure higher than atmospheric pressure as the insulating medium in at least one part. Internally, it mainly consists of circuit breakers, disconnectors, grounding switches, busbars, etc. LSC2 type gas-insulated switchgear typically adopts an upper and lower dual-chamber structure. The upper chamber contains the main busbar bushing, main busbar, branch busbars, three-position disconnectors, etc., while the lower chamber contains the circuit breaker solid-sealed poles, connecting bars, incoming and outgoing line bushings, etc., as well as through-wall bushings for connecting the upper and lower chambers.

[0004] Due to their small size and compact structure, gas-insulated switchgear has limited space inside the gas box for installing conductive connectors. This is especially true for high-current gas-insulated switchgear, where it is necessary to ensure the secure connection of conductive components and provide sufficient cross-section to meet the current-carrying capacity of the equipment. Switchgear with a double gas box structure is constructed by assembling and welding two gas boxes, essentially dividing the original single gas box into two parts. Therefore, it is more difficult to install and connect conductive connectors in its more confined space.

[0005] As an important component of switchgear, the conductive connectors in the wall bushing are crucial components. High-current switches, due to their large current carrying capacity, require larger copper cross-sections and more fixing points, making installation in confined spaces like gas boxes extremely inconvenient.

[0006] If the conductive connectors of the through-wall bushing are not reliably connected, it will lead to excessive local circuit resistance, poor current carrying capacity, and local high temperature heat source during operation. If the switchgear is operated for a long time, it will cause rapid aging and eventually burn out the equipment, posing a certain safety hazard to the power system. Therefore, it is very important to ensure the reliability of the connection of the conductive components of the equipment.

[0007] Therefore, there is an urgent need to provide a connection method for a highly reliable conductive device, which is a problem that needs to be solved in this field. Summary of the Invention

[0008] To address the technical problem of unreliability in the connection methods of conductive devices in existing gas-insulated switchgear, the present invention aims to provide a conductive connection device for through-wall bushings of high-current switchgear with a double-gas-box structure. This device enables the conductive connection to be made quickly, conveniently, and reliably, thereby ensuring the safe and reliable operation of the equipment. Furthermore, the present invention provides an installation method for the conductive connection device for through-wall bushings of high-current switchgear with a double-gas-box structure, effectively overcoming the problems existing in the prior art.

[0009] To achieve the above objectives, the present invention provides a conductive connection device for a through-wall bushing of a high-current switchgear with a dual-gas-box structure, comprising a first conductive connection unit, a second conductive connection unit, and an outer conductive connection unit. The first conductive connection unit is disposed on the gas box, and the second conductive connection unit is disposed on the circuit breaker. The first conductive connection unit and the second conductive connection unit are connected and conduct electricity. The outer conductive connection unit is disposed around the first conductive connection unit and the second conductive connection unit and is connected and fastened to the first conductive connection unit and the second conductive connection unit.

[0010] Furthermore, the first conductive connection unit includes a first conductive connection block and a first fastening component. One end of the first conductive connection block is mounted on the through-wall sleeve, and the first fastener is used to fix the first conductive connection block to the through-wall sleeve.

[0011] Furthermore, the first conductive connection unit also includes a first spring contact finger and a central conductive connection sleeve. The central conductive connection sleeve is installed on the first conductive connection block. The first spring contact finger is sleeved on the central conductive connection sleeve and the first conductive connection block. The central conductive connection sleeve is adsorbed on the upper bottom of the first conductive connection block under the pressure of the first spring contact finger. The sliding central conductive connection sleeve can be partially sleeved on the second conductive connection unit to connect and conduct the first conductive unit and the second conductive unit.

[0012] Furthermore, the second conductive connection unit includes a second conductive connection block and a second fastening assembly. The second conductive connection block is assembled on the solid-sealed pole and is connected to the moving end conductive connection block of the solid-sealed pole through the second fastening assembly.

[0013] Furthermore, the second conductive connection unit also includes a second spring contact finger, which is sleeved on the second conductive connection block.

[0014] Furthermore, the outer conductive connection unit includes a plurality of outer conductive connection blocks and a third fastening assembly. The plurality of outer conductive connection blocks are arranged around the periphery of the first conductive connection unit and the second conductive connection unit, and are connected to the first conductive connection block and the second conductive connection block through the third fastening assembly.

[0015] Furthermore, the outer conductive connecting block is provided with multiple slots for heat dissipation.

[0016] To achieve the above objectives, the present invention provides an installation method for a conductive connection device for a wall bushing of a high-current switchgear with a dual-gas-box structure, characterized in that the installation method is based on the conductive connection device for a wall bushing of a high-current switchgear with a dual-gas-box structure as described in any one of claims 1-7, and the installation method for the conductive connection device for a wall bushing of a high-current switchgear with a dual-gas-box structure includes the following steps: Step 1: First, install the first conductive connecting block onto the through-wall sleeve and fix it with fasteners. Then, install it into the gas box to be welded and connect it to the partition plate and mounting plate of the gas box through-wall sleeve with fasteners. The fasteners do not need to be tightened, leaving a certain amount of space for adjustment. Step 2: Install the second conductive connection block onto the circuit breaker and connect it to the moving end conductive component on the solid-sealed pole in the circuit breaker. After positioning with a positioning fixture, fix and tighten it with fasteners. Step 3: Then, the central conductive connecting sleeve is placed on the first conductive connecting block, and the spring contact fingers are respectively assembled on the first conductive connecting block and the second conductive connecting block. Under the pressure of the spring contact fingers, the central conductive connecting sleeve is placed on the first conductive connecting block and is attracted to the bottom of the upper end. Step 4: Install the circuit breaker on the welding gas box and fix it with fasteners. Slide the central conductive connecting sleeve that is adsorbed on the first conductive connecting block downwards and at the same time fine-tune the position of the through-wall bushing so that the central conductive sleeve connects the first and second conductive connecting blocks. Then fix the fasteners of the through-wall bushing and use locking screws to restrict the position of the central conductive connecting sleeve so that it can no longer slide up and down. Step 5: Finally, install the outer conductive connection unit of the conductive connection device. Use two outer conductive connection blocks to connect the first conductive connection block and the second conductive connection block. Secure the outer side with fasteners. Complete the installation of the conductive connection device phase by phase in sequence.

[0017] The present invention provides a conductive connection device and installation method for through-wall bushings of high-current switchgear with a dual-gas-box structure. It completes the conductive connection between the through-wall bushings in the gas box and the circuit breaker by first assembling and then connecting the components. This overcomes the difficulties of high-current switchgear components requiring multiple fixation points and having a large conductive current carrying capacity. The conductive connection device can be installed and connected in the limited space of the gas box, reducing the labor intensity of switchgear installation and improving the reliability of the conductive connection of the switchgear. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a schematic diagram of the assembly structure of the conductive connection device for the through-wall bushing of the high-current switchgear with a dual-air-box structure. Figure 2 This is a structural cross-sectional view of the through-wall bushing conductive connection device of this double-air-box structure high-current switchgear. Figure 3 This is a schematic diagram of the first conductive connection unit in the through-wall bushing conductive connection device of this dual-air-box structure high-current switchgear. Figure 4 This is a schematic diagram of the second conductive connection unit in the through-wall bushing conductive connection device of this dual-air-box structure high-current switchgear. Figure 5 This is a schematic diagram of the outer conductive connection unit in the through-wall bushing conductive connection device of a high-current switchgear with a double-air-box structure.

[0020] The following is an explanation of the component markings in the attached diagram: 1. First conductive connection unit 11. First conductive connection block 12. First fastening assembly 13. First spring contact finger 14. Central conductive connection sleeve 141. Locking assembly 2. Second conductive connection unit 21. Second conductive connection block 22. Second fastening assembly 23. Second spring contact finger 3. Outer conductive connection unit 31. Outer conductive connection block 32. Third fastener 33. Groove 4. Through-wall sleeve 5. Gas box partition 6. Through-wall sleeve mounting plate 7. Circuit breaker operating mechanism 8. Circuit breaker mounting plate 9. Solid-sealed pole 10. Poles moving end conductive connection block. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0022] Existing methods for connecting conductive devices in gas-insulated switchgear suffer from low reliability. To address this issue, this invention provides a conductive connection device for through-wall bushings in a high-current switchgear with a dual-gas-box structure. This device achieves the conductive connection between the through-wall bushing and the circuit breaker within the gas box through a modular assembly and subsequent connection method. This overcomes the difficulties of multi-point fixing of components and high current carrying capacity in high-current switchgear. The conductive connection device is installed and connected within the limited space of the gas box, reducing the labor intensity of switchgear installation and improving the reliability of the conductive connection. Furthermore, this invention also provides an installation method for the conductive connection device for through-wall bushings in a high-current switchgear with a dual-gas-box structure.

[0023] See Figures 1-2The conductive connection device for the through-wall bushing of a high-current switchgear with a dual-gas-box structure provided by the present invention includes a first conductive connection unit 1, a second conductive connection unit 2, and an outer conductive connection unit 3. The first conductive connection unit 1 is disposed on the gas box, the second conductive connection unit 2 is disposed on the circuit breaker, the first conductive connection unit 1 and the second conductive connection unit 2 are connected and conduct electricity, and the outer conductive connection unit 3 is disposed around the first conductive connection unit 1 and the second conductive connection unit 2.

[0024] Specifically, the first conductive connection unit 1 is disposed on the gas box, see [reference]. Figure 3 The first conductive connection unit 1 includes a first conductive connection block 11, a first fastening component 12, a first spring contact finger 13, and a central conductive connection sleeve 14. One end of the first conductive connection block 11 is mounted on the through-wall sleeve 4. The first conductive connection block 11 has several connection holes along its circumference, which, together with the first fastener 13, fix the first conductive connection block 11 to the through-wall sleeve 4.

[0025] Then, the through-wall sleeve 4 with the first conductive connecting block 11 installed is installed onto the welding gas box and connected to the gas box partition 5 and the through-wall sleeve mounting plate 6. It is fastened with fasteners, but does not need to be tightened, leaving a certain amount of space for adjustment later.

[0026] The central conductive connecting sleeve 14 is installed on the first conductive connecting block 111, and the first spring contact finger 13 is sleeved on the central conductive connecting sleeve 14 and the first conductive connecting block 11. Under the pressure of the first spring contact finger 13, the central conductive connecting sleeve 14 is adsorbed on the upper bottom of the first conductive connecting block 11.

[0027] The second conductive connection unit 2 is disposed on the circuit breaker. The circuit breaker is mainly composed of an operating mechanism 7, a circuit breaker mounting plate 8, a solid sealing pole 9, etc. The structural composition and assembly structure of the circuit breaker are described by those skilled in the art, and will not be elaborated in detail here.

[0028] See Figure 4 The second conductive connection unit 2 includes a second conductive connection block 21, a second fastening assembly 22, and a second spring contact finger 23. The second conductive connection block 21 is mounted on the solid-sealed pole 9 and is connected to the moving end conductive connection block 10 of the solid-sealed pole 9 through the second fastening assembly 22. The second spring contact finger 23 is sleeved on the second conductive connection block 21.

[0029] After the first conductive connection unit 1 and the second conductive connection unit 2 are installed, the circuit breaker is installed and fixed onto the welding gas box and connected and tightened with fasteners. At this time, the first conductive connection unit 1 and the second conductive connection unit 2 are set opposite to each other. The central conductive connection sleeve 14, which is attached to the first conductive connection block 11, slides down and is simultaneously finely adjusted on the position of the through-wall sleeve 4, so that the central conductive connection sleeve 14 partially slides into the second conductive connection block 21. Through the transition of the first spring contact finger 13 and the second spring contact finger 23, the upper and lower conductor circuits are connected. The fasteners of the through-wall sleeve 4 are fixed and tightened. Then, the locking component 141 is used to fix and limit the position of the central conductive connection sleeve 14 so that it can no longer slide up and down.

[0030] After the first conductive connection unit 1 and the second conductive connection unit 2 are connected and conductive, the outer conductive connection unit 3 is set around the first conductive connection unit 1 and the second conductive connection unit 2, and is connected to the first conductive connection unit 1 and the second conductive connection unit 2.

[0031] See Figure 5 The outer conductive connection unit 3 includes a plurality of outer conductive connection blocks 31 and a third fastening component 32. The plurality of outer conductive connection blocks 31 are arranged around the first conductive connection unit 1 and the second conductive connection unit 2, and are connected to the first conductive connection block 11 and the second conductive connection block 21 through the third fastening component 32. Then, the installation of the conductive connection devices of the remaining phases is completed in sequence, and the assembly is completed and other stages of equipment installation are entered.

[0032] In this scheme, the outer conductive connection unit 3 is preferably made by cutting a copper tube in half, and its cross-section is an arc structure. The block just meets the requirement of fitting the outer circle of the ends of the upper and lower conductive connection blocks.

[0033] Meanwhile, multiple slots 33 are preferably left on the outer conductive connection block of the outer conductive connection unit 3, which can be used for airflow exchange between the inside and outside of the heat-generating conductive connection device during the operation of the switching equipment, so as to facilitate heat dissipation.

[0034] Based on the above-described scheme for a conductive connection device for a wall bushing in a high-current switchgear with a double-gas-box structure, this scheme also provides an installation method for the conductive connection device for a wall bushing in a high-current switchgear with a double-gas-box structure. The installation method includes the following steps: Step 1: First, install the first conductive connecting block 11 onto the through-wall sleeve 4 and fix it with fasteners. Then, install it as a whole into the gas box to be welded and connect it with the partition plate 5 in the gas box and the through-wall sleeve mounting plate 6 of the mounting plate using fasteners. The fasteners do not need to be tightened, leaving a certain amount of space for position adjustment.

[0035] Step 2: Install the second conductive connection block 21 onto the circuit breaker and connect it to the moving end conductive component 10 on the solid-sealed pole of the circuit breaker. After positioning with a positioning fixture, fix and tighten it with fasteners.

[0036] Step 3: Then, the central conductive connecting sleeve 14 is placed on the first conductive connecting block 11, and the spring contact fingers are respectively assembled on the first conductive connecting block 11 and the second conductive connecting block 21. Under the pressure of the spring contact fingers, the central conductive connecting sleeve 14 is placed on the first conductive connecting block 11 and is attracted to the upper bottom.

[0037] Step 4: Install the circuit breaker on the welding gas box and fix it with fasteners. Slide the central conductive connecting sleeve 14, which is adsorbed on the first conductive connecting block 11, downward and at the same time fine-tune the position of the through-wall sleeve 4 so that the central conductive sleeve 4 connects the first and second conductive connecting blocks. Then fix the fasteners of the through-wall sleeve 4 and use locking screws to restrict the position of the central conductive connecting sleeve 14 so that it can no longer slide up and down.

[0038] Step 5: Finally, install the outer conductive connection unit 3 of the conductive connection device. Use two outer conductive connection blocks to connect the first conductive connection block 11 and the second conductive connection block 21. Secure the outer side with fasteners. Complete the installation of the conductive connection device phase by phase in sequence.

[0039] The through-wall bushing conductive connection device and installation method of the double-airbox structure high-current switchgear constructed by the above scheme, by assembling the conductive connection parts into multiple parts, meets the installation requirements in space-constrained environments and ensures the functional requirements of high-current switchgear.

[0040] Secondly, it reduces the impact of the skin effect of current in conductive components, improves the utilization rate of copper materials, and reduces costs.

[0041] Finally, the conductive connection device is easy and reliable to install, reducing labor intensity and improving work efficiency.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A double-gas-tank structure high-current switchgear wall bushing electrically connecting device, characterized in that, It includes a first conductive connection unit, a second conductive connection unit, and an outer conductive connection unit. The first conductive connection unit is disposed on the gas box, and the second conductive connection unit is disposed on the circuit breaker. The first conductive connection unit and the second conductive connection unit are connected and conduct electricity. The outer conductive connection unit is disposed around the first conductive connection unit and the second conductive connection unit and is connected and fastened to the first conductive connection unit and the second conductive connection unit.

2. The conductive connection device for through-wall bushing of a high-current switchgear with a double-gas-box structure according to claim 1, characterized in that, The first conductive connection unit includes a first conductive connection block and a first fastening component. One end of the first conductive connection block is mounted on the through-wall sleeve, and the first fastener is used to fix the first conductive connection block to the through-wall sleeve.

3. The conductive connection device for through-wall bushing of a high-current switchgear with a double-gas-box structure according to claim 2, characterized in that, The first conductive connection unit further includes a first spring contact finger and a central conductive connection sleeve. The central conductive connection sleeve is installed on the first conductive connection block. The first spring contact finger is sleeved on the central conductive connection sleeve and the first conductive block. The central conductive connection sleeve is adsorbed on the upper bottom of the first conductive connection block under the pressure of the first spring contact finger. The sliding central conductive connection sleeve can be partially sleeved on the second conductive connection unit to connect and conduct the first conductive unit and the second conductive unit.

4. The conductive connection device for through-wall bushing of a high-current switchgear with a double-gas-box structure according to claim 3, characterized in that, The second conductive connection unit includes a second conductive connection block and a second fastening assembly. The second conductive connection block is assembled on the solid-sealed pole and is connected to the moving end conductive connection block of the solid-sealed pole through the second fastening assembly.

5. The conductive connection device for through-wall bushing of a high-current switchgear with a double-gas-box structure according to claim 4, characterized in that, The second conductive connection unit further includes a second spring contact finger, which is sleeved on the second conductive connection block.

6. The conductive connection device for through-wall bushing of a high-current switchgear with a double-gas-box structure according to claim 1, characterized in that, The outer conductive connection unit includes a plurality of outer conductive connection blocks and a third fastening component. The plurality of outer conductive connection blocks are arranged around the periphery of the first conductive connection unit and the second conductive connection unit, and are connected to the first conductive connection block and the second conductive connection block through the third fastening component.

7. The conductive connection device for through-wall bushing of a high-current switchgear with a double-gas-box structure according to claim 6, characterized in that, The outer conductive connecting block is provided with multiple slots for heat dissipation.

8. An installation method for a conductive connection device for a through-wall bushing of a high-current switchgear with a double-gas-box structure, characterized in that, The installation method is based on the through-wall bushing conductive connection device of the double-gas-box structure high-current switchgear described in any one of claims 1-7. The installation method of the through-wall bushing conductive connection device of the double-gas-box structure high-current switchgear includes the following steps: Step 1: First, install the first conductive connecting block onto the through-wall sleeve and fix it with fasteners. Then, install it into the gas box to be welded and connect it to the partition plate and mounting plate of the gas box through-wall sleeve with fasteners. The fasteners do not need to be tightened, leaving a certain amount of space for adjustment. Step 2: Install the second conductive connection block onto the circuit breaker and connect it to the moving end conductive component on the solid-sealed pole in the circuit breaker. After positioning with a positioning fixture, fix and tighten it with fasteners. Step 3: Then, the central conductive connecting sleeve is placed on the first conductive connecting block, and the spring contact fingers are respectively assembled on the first conductive connecting block and the second conductive connecting block. Under the pressure of the spring contact fingers, the central conductive connecting sleeve is placed on the first conductive connecting block and is attracted to the bottom of the upper end. Step 4: Install the circuit breaker on the welding gas box and fix it with fasteners. Slide the central conductive connecting sleeve that is adsorbed on the first conductive connecting block downwards and at the same time fine-tune the position of the through-wall bushing so that the central conductive sleeve connects the first and second conductive connecting blocks. Then fix the fasteners of the through-wall bushing and use locking screws to restrict the position of the central conductive connecting sleeve so that it can no longer slide up and down. Step 5: Finally, install the outer conductive connection unit of the conductive connection device. Use two outer conductive connection blocks to connect the first conductive connection block and the second conductive connection block. Secure the outer side with fasteners. Complete the installation of the conductive connection device phase by phase in sequence.

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