Double-cable connecting device suitable for outgoing line spacing

Abstract

The utility model relates to a double-cable connecting device suitable for outgoing line spacing. The double-cable connecting device comprises a first cable assembly, a second cable assembly and a branch bus, the first cable assembly comprises a first shell and a first conductor; the first shell is provided with a device interface and a first bus interface; insulators are arranged at the device interface and the first bus interface, one end of the first conductor is connected with the insulator at the device interface, the other end of the first conductor is connected with the insulator at the first bus interface through a transition conductor, and the second cable assembly comprises a second shell and a second conductor; the second housing is provided with a second bus interface and a second cable interface, the second bus interface is provided with an insulator in sealed connection with the second housing, one end of the second conductor is connected with the insulator at the second bus interface, and two ends of the branch bus are respectively connected with the first bus interface and the second bus interface. Therefore, the first cable assembly and the second cable assembly form a double-cable power supply structure.

Description

Technical Field

[0001] This application relates to the field of GIS equipment cable outlet bay technology, and in particular to a dual cable connection device suitable for outlet bays. Background Technology

[0002] In modern high-voltage power transmission systems, gas-insulated metal-enclosed switchgear with voltage levels of 220kV and above is widely used in key power facilities such as substations due to its advantages of small footprint and high reliability. Currently, single-cable outgoing lines are commonly used for power transmission in GIS equipment cable outgoing bays with voltage levels of 220kV and above. However, since the single cable is the only path for power transmission in the cable outgoing bay, if the single cable fails, the entire cable outgoing bay will lose its power supply function, leading to a power outage risk for the connected power system. This will not only seriously affect the normal power supply of residents and cause inconvenience, but also bring huge economic losses to industrial users. Summary of the Invention

[0003] In view of this, this application proposes a dual cable connection device suitable for outgoing line bays, comprising: a first cable assembly, a second cable assembly, and a branch busbar;

[0004] The first cable assembly includes a first housing, a first conductor, and a first cable mounting component;

[0005] The first housing is provided with a device interface, a first busbar interface and a first cable interface; insulators are provided at both the device interface and the first busbar interface, and the insulators are sealed to the first housing; one end of the first conductor is connected to the insulator at the device interface, and the other end is connected to the insulator at the first busbar interface through a transition conductor; the first cable mounting piece is provided at the first cable interface and is suitable for electrically connecting the first external cable to the first conductor through the first cable mounting piece.

[0006] The second cable assembly includes a second housing, a second conductor, and a second cable mounting component;

[0007] The second housing has a second busbar interface and a second cable interface. An insulator that is sealed to the second housing is provided at the second busbar interface. One end of the second conductor is connected to the insulator at the second busbar interface. The second cable mounting piece is provided at the second cable interface and is suitable for electrically connecting the second external cable to the second conductor through the second cable mounting piece.

[0008] The two ends of the branch busbar are connected to the first busbar interface and the second busbar interface respectively, so that the first cable assembly and the second cable assembly form a dual-cable power supply structure.

[0009] In one possible implementation, both the first cable mounting component and the second cable mounting component include: a contact, a contact base, and a cable shield; one end of the contact is connected to the first conductor, the end of the contact away from the first conductor is plugged into and detached from the contact base, and the end of the contact base away from the contact is connected to an external cable through the cable shield.

[0010] In one possible implementation, a conductor shield is also included; the conductor shield is mounted on the first conductor and located on the side of the first conductor opposite to the first cable mounting.

[0011] In one possible implementation, the insulators at the device interface and the first busbar interface both protrude toward the second cable assembly and are connected to the first housing by bolts.

[0012] In one possible implementation, both the first housing and the second housing are provided with a first inspection port;

[0013] The first inspection port of the first housing is positioned opposite to the first cable interface; the first inspection port of the second housing is positioned opposite to the second cable interface.

[0014] In one possible implementation, a second access port is provided on the second housing; the second access port is arranged adjacent to the first access port.

[0015] In one possible implementation, there are three first cable assemblies and three second cable assemblies, and the three first cable assemblies and three second cable assemblies are arranged in a triangular structure.

[0016] Beneficial effects of this application

[0017] Compared to traditional single-cable connection devices, the dual-cable connection device of this application is configured with a first cable assembly, a second cable assembly, and a branch straight busbar. The first cable assembly, the second cable assembly, and the branch straight busbar work together, with the two external cables sharing the load, thereby reducing the current density of a single external cable, reducing external cable heating, and extending the service life of the external cable. When one cable assembly cannot work normally due to faults, maintenance, or other reasons, the other cable assembly can quickly take over the entire load, maintaining continuous power transmission, effectively reducing the risk of power outages in the outgoing line interval, achieving uninterrupted power supply, and improving the overall stability of the power grid. At the same time, the dual-cable connection device of this application realizes dual-cable power supply within the same outgoing line interval. This compact structural design can effectively save space and reduce overall construction costs.

[0018] Other features and aspects of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.

[0020] Figure 1 A cross-sectional view of the dual-cable connection device of this application is shown;

[0021] Figure 2 A top view of the dual-cable connection device of this application is shown. Detailed Implementation

[0022] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0023] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0026] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0027] This application proposes a dual-cable connection device suitable for outgoing cable bays, such as... Figure 1, Figure 2 As shown, the system includes a first cable assembly 100, a second cable assembly 200, and a branch busbar 300. The first cable assembly 100 includes a first housing 110, a first conductor 120, and a first cable mounting component. The first housing 110 is provided with a device interface, a first busbar interface, and a first cable interface. Insulators 101 are provided at both the device interface and the first busbar interface, and the insulators 101 are sealed to the first housing 110. One end of the first conductor 120 is connected to the insulator 101 at the device interface, and the other end is connected to the insulator 101 at the first busbar interface through a transition conductor. The first cable mounting component is provided at the first cable interface and is suitable for connecting the first external cable 130 to the first conductor 120 through the first cable mounting component. The first cable assembly 100 is electrically connected to the second cable assembly 200, which includes a second housing 210, a second conductor 220, and a second cable mounting component. The second housing 210 has a second busbar interface and a second cable interface. An insulator 101 is provided at the second busbar interface and is sealed to the second housing 210. One end of the second conductor 220 is connected to the insulator 101 at the second busbar interface. The second cable mounting component is provided at the second cable interface and is suitable for electrically connecting the second external cable 230 to the second conductor 220 through the second cable mounting component. The two ends of the branch busbar 300 are respectively connected to the first busbar interface and the second busbar interface, so that the first cable assembly 100 and the second cable assembly 200 form a dual-cable power supply structure.

[0028] It should be noted that the first housing 110 provides an installation base for various components; the device interfaces on the first housing 110 are used for electrical connection of relevant devices in the GIS equipment; the first busbar interface is used to connect to the branch busbar 300 to achieve power distribution; the first cable interface is used to connect the first external cable 130; insulators 101 are installed at the device interfaces and the first busbar interface, and are sealed to the first housing 110 to ensure the electrical insulation performance at each interface, while preventing external impurities, moisture, etc. from entering the interior of the first housing 110, thus avoiding conductor-to-housing connection issues due to poor insulation performance. Electrical conduction occurs between 110. One end of the first conductor 120 is electrically connected to the insulator 101 at the device interface, thereby receiving electrical energy transmitted from the GIS equipment device. The other end is electrically connected to the insulator 101 at the first bus interface through a transition conductor. The electrical energy is then transmitted to the second cable assembly 200 through the branch bus 300, thereby realizing the transmission and distribution of electrical energy. The first cable mounting component provides a stable connection point for the first conductor 120 and the first external cable 130, ensuring that the current can be smoothly transmitted from the first conductor 120 to the first external cable 130, thus ensuring the continuity and stability of power transmission.

[0029] The second housing 210 is used to provide an installation base for various components; the second busbar interface is used to connect to the branch busbar 300 to realize the split transmission of power; the second cable interface is used to connect the second external cable 230; an insulator 101 is provided at the second busbar interface and is sealed to the second housing 210 to ensure the electrical insulation performance at the second busbar interface; the second conductor 220 is connected to the insulator 101 at the second busbar interface to receive the electrical energy transmitted from the first cable assembly 100 through the branch busbar 300; the second conductor 220 is point-connected to the second external cable 230 through the second cable mounting component; the second cable mounting component provides a stable connection point for the second conductor 220 and the second external cable 230 to ensure that the current can be smoothly transmitted from the second conductor 220 to the second external cable 230.

[0030] The two ends of the branch busbar 300 are electrically connected to the first busbar interface of the first cable assembly 100 and the second busbar interface of the second cable assembly 200, respectively, so that the first cable assembly 100 and the second cable assembly 200 form a complete dual-cable power supply structure. The branch busbar 300 distributes the electrical energy from the GIS equipment to the first external cable 130 and the second external cable 230 through its own conductor structure, realizing the transmission and distribution of current between the two cable assemblies, realizing the simultaneous power supply of the two cables, and ensuring the normal operation of the power supply system.

[0031] Compared to traditional single-cable connection devices, the dual-cable connection device of this application is configured with a first cable assembly 100, a second cable assembly 200, and a branch straight busbar. The first cable assembly 100, the second cable assembly 200, and the branch straight busbar work together, with the two external cables sharing the load, thereby reducing the current density of a single external cable, reducing external cable heating, and extending the service life of the external cable. When one cable assembly cannot work normally due to faults, maintenance, or other reasons, the other cable assembly can quickly take over the entire load, maintain continuous power transmission, effectively reduce the risk of power outages in the outgoing line interval, achieve uninterrupted power supply, and improve the overall stability of the power grid. At the same time, the dual-cable connection device of this application realizes dual-cable power supply within the same outgoing line interval. This compact structural design can effectively save space and reduce the overall construction cost.

[0032] Furthermore, the first conductor 120 has a cavity with an opening on one side, and first mounting holes are provided at both ends of the first conductor 120; two bolts pass through the mounting holes at both ends of the first conductor 120 and are respectively fixedly connected to the insulator 101 and the transition conductor at the device interface. The end of the transition conductor away from the first conductor 120 is fixedly connected to the insulator 101 at the first busbar interface by bolts; a second mounting hole is provided on the first conductor 120, and the second mounting hole is arranged opposite to the opening of the first conductor 120. Bolts pass through the second mounting hole and are fixedly connected to the first cable assembly 100.

[0033] Furthermore, the second conductor 220 has the same structure as the first conductor 120, and one end of the second conductor 220 is fixedly connected to the insulator 101 at the second busbar interface by bolts; the second cable assembly 200 is fixedly connected to the second mounting hole of the second conductor 220 by bolts.

[0034] In one possible implementation, both the first cable mounting component and the second cable mounting component include: a contact 410, a contact base 420, and a cable shield 430; one end of the contact 410 is connected to the first conductor 120, the end of the contact 410 opposite to the first conductor 120 is pluggably connected to the contact base 420, and the end of the contact base 420 opposite to the contact 410 is connected to an external cable through the cable shield 430.

[0035] It should be noted that when the first external cable 130 is electrically connected to the first conductor 120 through the first cable mounting component, a bolt passes through the second mounting hole of the first conductor 120 and is threadedly connected to one end of the contact 410. The other end of the contact 410 is plugged into the contact base 420. The contact 410 provides a path for current, ensuring that power can be smoothly transmitted from the first conductor 120 to the contact base 420, and then to the first external cable 130. The contact base 420 provides a precise mating position for the contact 410. The plugging and unplugging connection method makes the connection and separation between the contact 410 and the contact base 420 very convenient. During installation, the connection is completed simply by inserting the contact 410 into the contact base 420. While requiring complex tools and cumbersome operations, this improves work efficiency. Meanwhile, the end of the contact base 420 facing away from the contact 410 is connected to the cable shield 430, thereby transmitting power from the contact 410 to the first external cable 130. The cable shield 430 effectively shields the electromagnetic field transmitted inside the first external cable 130, ensuring the stability of power transmission. Furthermore, when the first external cable 130 is connected to the contact base 420, the cable shield 430 wraps around the connection point, preventing the first external cable 130 from loosening due to bending, stretching, or vibration, thus ensuring the reliability and stability of the connection.

[0036] Furthermore, the second external cable 230 is electrically connected to the second conductor 220 through the second cable mounting component; wherein, the structure and connection method of the second cable mounting component are the same as those of the first cable mounting component, which have been described in detail above and will not be repeated here.

[0037] In one possible implementation, a conductor shield 500 is also included; the conductor shield 500 is mounted on the first conductor 120 and located on the side of the first conductor 120 opposite to the first cable mounting.

[0038] It should be noted that a fixing lug is provided at the opening of the first conductor 120. The conductor shield 500 is connected to the fixing thread on the first conductor 120 by bolts, thereby realizing the electrical connection between the conductor shield 500 and the first conductor 120. The conductor shield 500 uses its own conductivity to guide the redistribution of charges, thereby reducing the gradient of electric field intensity in space. This makes the electric field distribution around the first conductor 120 more uniform, thus avoiding excessively high local electric field intensity in the first conductor 120 and optimizing the electric field distribution around the first conductor 120.

[0039] Furthermore, the shielding conductor on the second conductor 220 has the same installation structure and connection method as the shielding conductor on the first conductor 120, which has been described in detail above and will not be repeated here.

[0040] In one possible implementation, both the first housing 110 and the second housing 210 are provided with a first inspection port 610; the first inspection port 610 of the first housing 110 is arranged opposite to the first cable interface; the first inspection port 610 of the second housing 210 is arranged opposite to the second cable interface.

[0041] It should be noted that the design of the first inspection port 610 greatly simplifies the installation and maintenance process. Through the first inspection port 610, workers can directly install and disassemble the first conductor 120 (or second conductor 220) and contact 420 within the first housing 110 (or second housing 210), as well as connect the first external cable 130 (or second external cable 230). This avoids damage to the dual-cable device caused by frequent disassembly and assembly, improving work efficiency. When the dual-cable connection device requires high-voltage testing, the first inspection port 610 can be used to install tooling sleeves. By installing the tooling sleeves through the first inspection port 610, the withstand voltage test of the dual-cable connection device and the external cables can be achieved. The design of having first inspection ports 610 in both the first housing 110 and the second housing 210 allows workers to complete the withstand voltage test of the dual-cable connection device or the external cables by installing the tooling sleeves only once, avoiding repeated disassembly and installation of the tooling sleeves, shortening the construction cycle, and thus avoiding multiple gas filling and releasing operations, reducing the number of gas filling and releasing operations, and lowering testing costs.

[0042] In one possible implementation, a second access port 620 is provided on the second housing 210; the second access port 620 is arranged adjacent to the first access port 610. It should be noted that the design of the second access port 620 allows workers to simultaneously disassemble and assemble the equipment inside the second housing 210 from different positions. While one worker is operating at one of the first access ports 610, another worker can provide assistance from the adjacent second access port 620, thereby making the disassembly and assembly process smoother and improving work efficiency.

[0043] In one possible implementation, both the first access port 610 and the second access port 620 are provided with sealing covers. The sealing covers are bolted to the first access port 610 and the second access port 620. The sealing covers are suitable for sealing the first access port 610 and the second access port 620 in a non-operating state, thereby ensuring the stability of the electrical environment inside the first housing 110 and the second housing 210.

[0044] In one possible implementation, the insulators 101 at the device interface and the first bus interface both protrude toward the second cable assembly 200 and are both connected to the first housing 110 by bolts.

[0045] Furthermore, the insulators 101 at the device interface and the first busbar interface are both basin-type insulators 101.

[0046] In one possible implementation, three of each of the first cable assembly 100 and the second cable assembly 200 are arranged in a triangular configuration. It should be noted that by setting three of each of the first cable assembly 100 and the second cable assembly 200, and arranging them in a triangular configuration, while electrically connecting the three-phase conductors of the first external cable 130 to the first cable assembly 100 and the three-phase conductors of the second external cable 230 to the second cable assembly 200, this design not only improves the reliability and stability of the power supply system and optimizes current distribution and load balancing, but also allows for an efficient and compact layout of the dual-cable connection device within a limited space, reducing floor space and improving space utilization efficiency.

[0047] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A dual-cable connection device suitable for outgoing cable bays, characterized in that, include: First cable assembly, second cable assembly, and branch busbar; The first cable assembly includes a first housing, a first conductor, and a first cable mounting component; The first housing is provided with a device interface, a first busbar interface, and a first cable interface; each of the device interface and the first busbar interface is provided with an insulator, and the insulator is sealed to the first housing; one end of the first conductor is connected to the insulator at the device interface, and the other end is connected to the insulator at the first busbar interface through a transition conductor; the first cable mounting piece is provided at the first cable interface and is suitable for electrically connecting the first external cable to the first conductor through the first cable mounting piece; The second cable assembly includes a second housing, a second conductor, and a second cable mounting component; The second housing is provided with a second busbar interface and a second cable interface. An insulator is provided at the second busbar interface and is sealed to the second housing. One end of the second conductor is connected to the insulator at the second busbar interface. The second cable mounting piece is provided at the second cable interface and is suitable for electrically connecting the second external cable to the second conductor through the second cable mounting piece. The two ends of the branch busbar are respectively connected to the first busbar interface and the second busbar interface, so that the first cable assembly and the second cable assembly form a dual-cable power supply structure.

2. The dual-cable connection device suitable for outgoing cable bays according to claim 1, characterized in that, Both the first cable mounting component and the second cable mounting component include: a contact, a contact base, and a cable shield; One end of the contact is connected to the first conductor, the end of the contact away from the first conductor is plugged into the contact seat, and the end of the contact seat away from the contact is connected to an external cable through the cable shield.

3. The dual-cable connection device suitable for outgoing cable bays according to claim 1, characterized in that, It also includes conductor shielding; The conductor shield is mounted on the first conductor and is located on the side of the first conductor away from the first cable mounting.

4. The dual-cable connection device suitable for outgoing cable bays according to claim 1, characterized in that, The insulators at the device interface and the first busbar interface both protrude towards the second cable assembly and are connected to the first housing by bolts.

5. The dual-cable connection device suitable for outgoing cable bays according to claim 1, characterized in that, Both the first housing and the second housing are provided with a first inspection port; The first inspection port of the first housing is disposed opposite to the first cable interface; the first inspection port of the second housing is disposed opposite to the second cable interface.

6. The dual-cable connection device suitable for outgoing cable bays according to claim 5, characterized in that, A second inspection port is provided on the second housing; The second inspection port is located adjacent to the first inspection port.

7. The dual-cable connection device suitable for outgoing cable bays according to claim 1, characterized in that, There are three of each of the first and second cable assemblies, and the three first and second cable assemblies are arranged in a triangular pattern.

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