High-voltage bypass cabinet with switching function

Abstract

The utility model relates to the technical field of high-voltage bypass cabinets, in particular to a high-voltage bypass cabinet with a switching function, which comprises a cabinet body, a contactor, an isolating switch, a frequency converter and a bypass contactor, the inlet wire, the contactor, the isolating switch, the frequency converter and the outlet wire form a main circuit, and the inlet wire, the bypass contactor and the outlet wire form a bypass; wherein a detection unit is connected between the contactor and the isolating switch, and the detection unit is designed between the contactor and the isolating switch below, so that in the working process, when the circuit of the main circuit is switched on, a lamp of the detection unit receives power supply and emits light, and the current main circuit is displayed to be in a power supply state; otherwise, the current main circuit is cut off, and the bypass contactor can be operated, so that the safety of the switching operation of the main circuit and the bypass is improved.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage bypass cabinet technology, and in particular to a high-voltage bypass cabinet with switching function. Background Technology

[0002] With the widespread application of high-voltage frequency converters, their operational reliability is receiving increasing attention. Besides using high-quality, highly reliable frequency converters, most manufacturers consider configuring bypass cabinets. This allows for switching to mains power when a frequency converter malfunctions, reducing power outage time and improving system reliability.

[0003] Currently, high-voltage bypass cabinets generally include bypass contactors, incoming line contactors, incoming line automatic disconnect switches, frequency converters and other control components. For details, please refer to the high-voltage variable frequency automatic bypass cabinet disclosed in Chinese Patent Announcement No. "CN206820639U".

[0004] In the current process of switching between the main road and the bypass, there is usually no device to detect the on / off status of the main road. Therefore, during the switching process, the system cannot confirm in real time whether the main road has been completely disconnected. If the bypass is activated before the main road is completely disconnected, it may lead to a safety accident.

[0005] Based on this, in order to improve the operational safety of bypass switching, we propose a high-voltage bypass cabinet with switching function. Utility Model Content

[0006] This utility model is proposed to address the shortcomings of existing technologies, such as the lack of a device for detecting the on / off status of the main circuit, which may lead to safety accidents. It provides a high-voltage bypass cabinet with switching function.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] Design a high-voltage bypass cabinet with switching function, including a cabinet and a contactor, disconnecting switch, frequency converter and bypass contactor installed in the cabinet. An incoming line and an outgoing line are connected to one side of the cabinet. The incoming line, contactor, disconnecting switch, frequency converter and the outgoing line form the main line. The incoming line, bypass contactor and the outgoing line form the bypass.

[0009] A detection unit is connected between the contactor and the disconnecting switch, and the detection unit is used to detect the continuity of the main circuit.

[0010] Furthermore, the detection unit includes a mounting base;

[0011] The upper end of the mounting base has four sets of grooves, and conductive sheets are fixedly connected to two grooves in each set. A clamping bolt through which the conductive sheet passes is threaded into the groove.

[0012] Furthermore, the contactor and disconnector are cut off at the middle, and the wires at the two cut-off ends are connected to the clamping bolts through terminals.

[0013] Furthermore, it also includes a cover plate connected to the mounting base, the cover plate and the mounting base being detachably connected, and a lamp being fixedly mounted on the top of the cover plate, the lamp being electrically connected via two conductive components, a phase wire and a ground wire.

[0014] Furthermore, the conductive component includes a sleeve fixedly connected below the cover plate, a contact is movably inserted inside the sleeve, a wire is fixedly installed at the upper end of the contact, and the wire is electrically connected to the lamp.

[0015] A spring is fixedly connected between the contact and the inner wall of the sleeve.

[0016] Furthermore, a switch is installed at the upper end of the cover plate, which is used to control the on / off state of one of the wires.

[0017] Furthermore, the upper end of the mounting base is provided with an insertion hole, and the bottom of the cover plate is provided with an insertion part, which is inserted into the insertion hole. The outer side of the mounting base is provided with a locking hole communicating with the insertion hole, and a positioning glass bead is embedded in the outer side of the insertion part. The telescopic end of the positioning glass bead is engaged with the locking hole.

[0018] The present invention proposes a high-voltage bypass cabinet with switching function, which has the following advantages: In this invention, a detection unit is designed between the contactor and the disconnecting switch at the bottom. During operation, when the main circuit is on, the lamp of the detection unit is powered on and illuminates, indicating that the main circuit is currently powered. Conversely, when the main circuit is off, it indicates that the main circuit is cut off, and the bypass contactor can be operated, thereby improving the safety of the main circuit and bypass switching operation. Attached Figure Description

[0019] Figure 1 This is the front view of the present invention;

[0020] Figure 2 This is a perspective view of the detection unit of this utility model;

[0021] Figure 3 This is the front view of the detection unit of this utility model.

[0022] In the diagram: 1. Cabinet; 2. Contactor; 3. Disconnector; 4. Frequency converter; 5. Bypass contactor; 6. Incoming line; 7. Outgoing line; 8. Detection unit; 81. Mounting base; 82. Conductive sheet; 83. Clamping bolt; 84. Cover plate; 85. Light fixture; 86. Conductive component; 861. Sleeve; 862. Contact; 863. Wire; 864. Spring; 87. Switch; 88. Socket; 881. Locking hole; 89. Plug-in part; 891. Positioning glass bead. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Reference Figure 1-3 As one embodiment of this utility model, a high-voltage bypass cabinet with switching function is disclosed. Specifically, the bypass cabinet includes a cabinet body 1 and a contactor 2, a disconnecting switch 3, a frequency converter 4, and a bypass contactor 5 installed in the cabinet body 1.

[0025] One side of the cabinet 1 is connected to an inlet line 6 and an outlet line 7. The inlet line 6, contactor 2, disconnector 3, frequency converter 4, and outlet line 7 form the main circuit, and the inlet line 6, bypass contactor 5, and outlet line 7 form the bypass circuit. The contactor 2 includes an inlet contactor and an outlet contactor. Similarly, the disconnector 3 includes an inlet disconnector and an outlet disconnector. Each contactor 2, disconnector 3, and bypass contactor 5 has its own electric opening and closing mechanism, and each electric opening and closing mechanism is electrically connected to an external control module. The specific working principle has been disclosed in the prior art and will not be elaborated here.

[0026] A detection unit 8 is connected between the contactor 2 and the disconnecting switch 3 below. The detection unit 8 is used to detect the on / off state of the main circuit. Specifically, in this utility model, the detection unit 8 is used to detect the main circuit to determine whether the entire main circuit is completely closed, thereby ensuring the safety of subsequent bypass switching.

[0027] In some embodiments, the detection unit 8 of the present invention includes a mounting base 81;

[0028] The upper end of the mounting base 81 has four sets of grooves, and a conductive sheet 82 is fixedly connected to two grooves in each set. A clamping bolt 83 through which the conductive sheet 82 is threaded is connected to the groove.

[0029] Furthermore, in this embodiment, the contactor 2 and the disconnector switch 3 are cut off at the middle, and the wires at the two cut-off ends are connected to the clamping bolt 83 through a terminal block. The terminal block is a conventional wiring method for those skilled in the art, and will not be described in detail here.

[0030] Specifically, in this embodiment, the design of four sets of grooves adapting to four conductive plates 82 can support the connection of the three phase lines and the ground line of three-phase electricity. Thus, when the outgoing line 7 is cut off, the two connecting ends of the outgoing line 7 are connected to the four conductive plates 82 to maintain the continuity of the circuit.

[0031] Based on the above embodiments, this utility model also includes a cover plate 84 connected to the mounting base 81. The cover plate 84 and the mounting base 81 are detachably connected. A lamp 85 is fixedly installed on the top of the cover plate 84. The lamp 85 is electrically connected through two conductive components 86, a phase wire, and a ground wire. As those skilled in the art know, since a single phase wire and a single ground wire form 220V, the lamp 85 in this embodiment should be configured to be powered by 220V. In actual operation, when the main circuit is on, the lamp 85 receives power and illuminates, indicating that the main circuit is currently powered. Conversely, when the main circuit is off, it indicates that the main circuit is cut off, and the bypass contactor 5 can be operated, thus improving the safety of the main circuit and bypass switching operation.

[0032] Preferably, the conductive component 86 in this embodiment includes a sleeve 861 fixedly connected below the cover plate 84, and a contact 862 is movably inserted inside the sleeve 861. In this embodiment, the contact 862 abuts against the upper end of the clamping bolt 83, that is, the clamping bolt 83 in this embodiment should also be set as a conductive component. A wire 863 is fixedly installed on the upper end of the contact 862, and the wire 863 is electrically connected to the lamp 85.

[0033] A spring 864 is fixedly connected between the contact 862 and the inner wall of the sleeve 861. The design of the spring 864 can ensure close contact between the contact 862 and the clamping bolt 83, thereby improving the electrical conductivity stability of the lamp 85.

[0034] Of course, in order to turn off the lamp 85 and achieve energy saving when no testing is required, a switch 87 is also installed on the upper end of the cover plate 84 in this embodiment. The switch 87 is used to control the on / off state of one of the wires 863. In this embodiment, the switch 87 controls the on / off state of the entire lamp 85 by controlling the on / off state of one wire 863. The switch controls the on / off state of the circuit in a conventional circuit control manner, so it will not be explained in detail here.

[0035] In other words, when the cover plate 84 is installed on the mounting base 81, the two contacts 862 respectively abut against the clamping bolt 83 on a phase wire and the clamping bolt 83 on the ground wire, and power is supplied to the lamp 85 through the two wires 863. At this time, the lamp 85 lights up to indicate that the main circuit is connected.

[0036] During the switching operation, the illumination status of lamp 85 can be used to quickly determine whether the main circuit is normally shut down, so as to ensure the safety of subsequent operation of bypass contactor 5.

[0037] Furthermore, the design of the switch 87 in this invention allows the lamp 85 to be turned off when no testing is required during normal operation, thereby achieving energy saving.

[0038] It should be noted that, in this embodiment, the upper end of the mounting base 81 is provided with an insertion hole 88, and the bottom of the cover plate 84 is provided with an insertion part 89. The insertion part 89 is inserted into the insertion hole 88. The outer side of the mounting base 81 is provided with a locking hole 881 communicating with the insertion hole 88. The outer side of the insertion part 89 is fitted with a positioning glass bead 891, and the telescopic end of the positioning glass bead 891 is engaged with the locking hole 881.

[0039] Specifically, in this embodiment, four insertion parts 89 and four insertion holes 88 are provided, and two positioning glass beads 891 are provided, which are distributed on the two diagonally opposite insertion parts 89. The cover plate 84 is installed and fixed by the insertion and matching of the insertion parts 89 and the insertion holes 88, and by the snap-fit ​​of the positioning glass beads 891 and the locking holes 881.

[0040] In summary, this utility model incorporates a detection unit 8 between the contactor 2 and the disconnect switch 3. During operation, when the main circuit is connected, the lamp 85 of the detection unit 8 receives power and illuminates, indicating that the main circuit is currently powered. Conversely, when the main circuit is disconnected, the bypass contactor 5 can be operated, thus improving the safety of switching between the main and bypass circuits.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-voltage bypass cabinet with switching function, comprising a cabinet (1) and a contactor (2), a disconnecting switch (3), a frequency converter (4), and a bypass contactor (5) installed in the cabinet (1), characterized in that: One side of the cabinet (1) is connected to an incoming line (6) and an outgoing line (7). The incoming line (6), contactor (2), disconnector (3), frequency converter (4) and the outgoing line (7) form the main circuit, and the incoming line (6), bypass contactor (5) and the outgoing line (7) form the bypass circuit. A detection unit (8) is connected between the contactor (2) and the disconnector (3) below, and the detection unit (8) is used to detect the continuity of the main circuit.

2. A high-voltage bypass cabinet with switching function according to claim 1, characterized in that: The detection unit (8) includes a mounting base (81); The upper end of the mounting base (81) has four sets of grooves, and a conductive sheet (82) is fixedly connected in two grooves of each set. A clamping bolt (83) through which the conductive sheet (82) passes is threaded into the groove.

3. A high-voltage bypass cabinet with switching function according to claim 2, characterized in that: The wire between the contactor (2) and the disconnector (3) is cut off in the middle, and the wires at the two cut ends are connected to the clamping bolt (83) through the terminal block.

4. A high-voltage bypass cabinet with switching function according to claim 2, characterized in that: It also includes a cover plate (84) connected to the mounting base (81), the cover plate (84) and the mounting base (81) being detachably connected, and a lamp (85) being fixedly mounted on the top of the cover plate (84), the lamp (85) being electrically connected via two conductive components (86) and a phase wire and a ground wire.

5. A high-voltage bypass cabinet with switching function according to claim 4, characterized in that: The conductive component (86) includes a sleeve (861) fixedly connected below the cover plate (84), a contact (862) is movably inserted inside the sleeve (861), a wire (863) is fixedly installed at the upper end of the contact (862), and the wire (863) is electrically connected to the lamp (85). A spring (864) is fixedly connected between the contact (862) and the inner wall of the sleeve (861).

6. A high-voltage bypass cabinet with switching function according to claim 5, characterized in that: A switch (87) is also installed at the upper end of the cover plate (84), the switch (87) being used to control the on / off state of one of the wires (863).

7. A high-voltage bypass cabinet with switching function according to claim 4, characterized in that: The upper end of the mounting base (81) is provided with a socket (88), and the bottom of the cover plate (84) is provided with a plug-in part (89). The plug-in part (89) is inserted into the socket (88). The outer side of the mounting base (81) is provided with a locking hole (881) that communicates with the socket (88). The outer side of the plug-in part (89) is fitted with a positioning glass bead (891). The telescopic end of the positioning glass bead (891) is engaged with the locking hole (881).

Images