Electrical low-voltage power distribution cabinet

Abstract

The utility model discloses an electrical low-voltage power distribution cabinet, which comprises a cabinet shell, a circuit breaker and a power transmission mechanism, an n-shaped support is mounted in the center of the interior of the cabinet shell through bolts, and left and right corresponding mounting frames are fixedly mounted at the upper end and the lower end of the rear wall of the cabinet shell; the circuit breaker is installed in the middle of the upper side face of the n-shaped support, and first contact pieces are arranged at input and output contacts on the rear side face of the circuit breaker; the power transmission mechanisms are respectively arranged at the upper ends of the mounting racks, and the power transmission mechanisms and the first contact pieces of the circuit breakers are mounted in a matched manner; the electrical low-voltage power distribution cabinet further comprises a PLC, the PLC is arranged on the right side face of the cabinet shell, the input end of the PLC is electrically connected with an external power source, and the input end of the circuit breaker is electrically connected with the output end of the PLC. And high-voltage and low-voltage instability can be quickly, intelligently and automatically processed, and electrical elements are protected.

Description

TECHNICAL FIELD

[0001] The utility model relates to power distribution equipment technical field, concretely is a kind of electrical low voltage switchboard. BACKGROUND

[0002] Under the background of rapid economic and technological development, low voltage switchboard for distribution and control of electric energy use has also achieved rapid development accordingly, at present stage, a large number of modern enterprises with advanced equipment have sprung up in our country, but the deficiency of low voltage switchboard in various aspects makes the power supply quality of power grid be influenced, only through technological innovation, can improve power supply quality, at the same time, the life and protection of switchboard become a big problem, electrical low voltage switchboard with fuse can well prevent high pressure use, but existing electrical low voltage switchboard has following problems, detection and processing means are single, high pressure and low pressure protection mode is single, cannot sensitively handle and provide protection to electrical components, extremely easy to cause damage to switchboard, for this purpose, we propose a kind of electrical low voltage switchboard. UTILITY MODEL CONTENT

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art, provide an electrical low voltage switchboard, real-time detection, reaction to circuit problem through intelligent rapid, protection to electrical components, which can effectively solve the problems in the background art.

[0004] To achieve the above object, the utility model provides the following technical scheme: an electrical low voltage switchboard, including cabinet shell, circuit breaker and power transmission mechanism;

[0005] Cabinet shell: its inside center is provided with H-shaped support through bolt, and the upper end and the lower end of the back wall of the cabinet shell are fixedly provided with left-right corresponding mounting racks;

[0006] Circuit breaker: it is installed in the upper side surface middle part of H-shaped support, and the input and output contact points of the rear side surface of circuit breaker are each provided with a contact piece one;

[0007] Power transmission mechanism: it is respectively arranged at the upper end of mounting rack, and the power transmission mechanism is matched with the contact piece one of circuit breaker and is installed;

[0008] Among them: still include PLC controller, the PLC controller is arranged at the right side surface of cabinet shell, and the input end of PLC controller is electrically connected with external power supply, and the input end of circuit breaker is electrically connected with the output end of PLC controller, after multiple detection, high pressure and low pressure are rapidly detected and handled, high pressure and low pressure are not stable and can be rapidly intelligently automatically handled, and electrical components are protected.

[0009] Furthermore, the power transmission mechanism includes a power transmission board 1, a power transmission frame, an insulating support plate, a power rack, a connection hole and a power transmission board 2. The power transmission board 1 is fixedly mounted on the middle part of the upper mounting frame, and the power transmission board 2 is fixedly mounted on the middle part of the lower mounting frame. The rightmost side of the power transmission board 2 is provided with a mounting hole. The right end of the lowermost power transmission board 1, the middle part of the middle power transmission board 1 and the left end of the uppermost power transmission board 1 are all connected to the power transmission frame by bolts and fixed on the power transmission board 1. There is a gap between the power transmission rack and the other two power transmission boards. The lower ends of the three groups of power transmission racks are connected to the contact pieces adjacent to the upper ends by bolts. The middle part of the rear wall of the cabinet is connected to the evenly distributed power drain racks through rubber insulating columns. The two laterally adjacent power transmission racks and the two laterally adjacent power drain racks are connected by insulating support plates. The three contact pieces at the lower end are respectively connected to the adjacent power drain racks by bolts. The front end of the power drain rack is provided with connection holes to send the circuit to the front end of the lower end.

[0010] Furthermore, it also includes current sensor 1 and current sensor 2, wherein current sensor 1 is fixedly installed on the upper end of the rear wall of the cabinet shell, and current sensor 2 is fixedly installed on the lower end of the rear wall of the cabinet shell. The power distribution rack passes through the middle of the adjacent current sensor 2, and current sensor 1 is connected in series to the upper end of the power transmission rack. A bracket is provided at the upper end of the cabinet shell, and the bracket is located at the upper end of the 冂-shaped bracket. An operation port corresponding to current sensor 1 is opened at the upper end of the bracket. Current sensor 1 and current sensor 2 are both electrically connected to the PLC controller in two directions to perform real-time detection on the circuit and protect the safety of the circuit.

[0011] Furthermore, a wiring box is fixedly installed on the left end of the bracket, and a wire groove is provided on the right side of the wiring box at the left end and the upper side of the wiring box at the right end. A fuse is provided on the front side of the vertical plate of the bracket, and the input end of the fuse is connected to the output end of the longitudinally adjacent current sensor through a wire to provide secondary protection for the circuit.

[0012] Furthermore, a cabinet door is hinged on the left side of the front side of the cabinet shell through a hinge, a cabinet door handle is installed in the middle of the right end of the front side of the cabinet shell, and a display is fixedly installed in the middle of the upper end of the front side of the cabinet shell door. The input end of the display is electrically connected to the output end of the PLC controller to provide real-time feedback on the internal situation.

[0013] Furthermore, a mounting plate is installed at the wiring port in the middle of the left end of the rear side of the cabinet shell by bolts, and the mounting plate corresponds to the front-to-back position of the power transmission board on the leftmost side of the upper end of the cabinet shell, which is convenient for the installation of the live wire.

[0014] Furthermore, heat dissipation filters are provided in the heat dissipation openings on the left side and the right side of the cabinet shell, and the two heat dissipation filters are located in corresponding left and right positions for heat dissipation.

[0015] Furthermore, the rear end of the right side of the cabinet shell is provided with a wire entry hole, which corresponds to the left and right positions of the power transmission board one by one for the entry of cables.

[0016] Furthermore, a table corner is provided at the lower end of the cabinet shell to facilitate standing on the cabinet shell.

[0017] Compared with the prior art, the beneficial effects of the present invention are: the electrical low-voltage distribution cabinet has the following advantages:

[0018] The electrician inserts the high-voltage cable into the cabinet through the wire entry hole, removes the mounting plate, and installs the three live wires on the leftmost end of the three power transmission boards on the mounting frame at the upper end of the cabinet. The ground wire and the neutral wire are installed on the leftmost end of the power transmission board on the mounting frame at the lower end of the cabinet. The electrician pulls the cabinet door handle to open the cabinet door, installs the input wires of the external electrical appliance to the connection hole at the lower end of the power rack, closes the cabinet door, and the current inside the three live wires flows through the power transmission board to the power transmission rack. The electricity from the power transmission rack flows to the circuit breaker and current sensor one respectively. At this time, the circuit breaker is in the disconnected state. When the current sensor one senses that there is no problem with the inflowing current, the current sensor one sends an electrical signal to the PLC controller. The PLC controller controls the circuit breaker to close, and the current flows from the rear end of the circuit breaker. The contact flows to the power distribution rack, and the current flows to the connection hole at the front end of the power distribution rack. When the current flows out of the circuit breaker and passes through the secondary detection of current sensor 2, current sensor 2 finds that there is a problem with the current. Current sensor 2 transmits the electrical signal to the PLC controller. The PLC controller controls the circuit breaker to disconnect. When the circuit breaker fails, the circuit breaker will not disconnect automatically, and the fuse will disconnect at high temperature to further protect the circuit of the distribution cabinet. The PLC controller will transmit the current and voltage at the detection point to the display at any time. When everything is normal, the PLC controller can manually control the opening and closing of the circuit breaker. After multiple tests, it can quickly detect and process high and low voltages. The instability of high and low voltages can be quickly and intelligently processed automatically to provide protection for electrical components. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the front section of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the utility model from the rear;

[0022] Figure 4 This is a schematic diagram of the rear cross-section of the present invention;

[0023] Figure 5 It is a structural schematic diagram of the utility model from the left.

[0024] In the figure: 1 cabinet shell, 2 cabinet shell door handle, 3 cabinet shell door handle, 4 heat dissipation filter screen, 5 circuit breaker, 6 current sensor one, 7 power transmission mechanism, 71 power transmission plate one, 72 power transmission frame, 73 insulating support plate, 74 power distribution frame, 75 connecting hole, 8 fuse, 9 wire slot, 10 wire box, 11 I-shaped support, 12 support, 13 wire inlet hole, 14 mounting plate, 15 current sensor two, 16 PLC controller, 17 box leg, 18 display, 19 mounting frame. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0026] Please refer to Figure 1-5 The embodiment provides a technical scheme: an electrical low-voltage power distribution cabinet, comprising a cabinet shell 1, a circuit breaker 5 and a power transmission mechanism 7.

[0027] The cabinet shell 1: the inside center is provided with an I-shaped support 11 through bolt installation, the upper end and the lower end of the rear wall of the cabinet shell 1 are fixedly provided with left and right corresponding mounting frames 19, the front left side of the cabinet shell 1 is hingedly provided with a cabinet shell door 2, the front side right end middle part of the cabinet shell door 2 is provided with a cabinet shell door handle 3, the front side upper end middle part of the cabinet shell door 2 is fixedly provided with a display 18, the input end of the display 18 is electrically connected with the output end of the PLC controller 16, the wiring port of the left end middle part of the rear side of the cabinet shell 1 is provided with a mounting plate 14 through bolt installation, the mounting plate 14 corresponds to the front and rear positions of the leftmost power transmission plate one 71 of the upper end of the cabinet shell 1, the left side and the right side of the cabinet shell 1 are both provided with heat dissipation filter screens 4 in the heat dissipation openings, the left and right positions of the two heat dissipation filter screens 4 correspond, the right side rear end of the cabinet shell 1 is provided with wire inlet holes 13, the wire inlet holes 13 correspond to the left and right positions of the power transmission plate one 71 respectively, the lower end of the cabinet shell 1 is provided with a table corner 17, an electrician enters the high-voltage cable into the inside of the cabinet shell 1 from the wire inlet hole 13, the heat dissipation filter screens 4 of the left side and the right side of the cabinet shell 1 are used for ventilation in the cabinet shell, so that overheating is avoided;

[0028] The circuit breaker 5: it is installed in the middle part of the upper side of the I-shaped support 11, and the input and output contact points of the rear side of the circuit breaker 5 are both provided with contact pieces one;

[0029] Power transmission mechanism 7: It is respectively arranged at the upper end of the mounting frame 19, and the power transmission mechanism 7 is installed in conjunction with the contact piece 1 of the circuit breaker 5. The power transmission mechanism 7 includes a power transmission board 1 71, a power transmission frame 72, an insulating support plate 73, a power discharge frame 74, a connection hole 75 and a power transmission board 2 76. The power transmission board 1 71 is respectively fixedly installed in the middle of the upper mounting frame 19, and the power transmission board 2 76 is respectively fixedly installed in the middle of the lower mounting frame 19. The rightmost side of the power transmission board 2 76 is provided with a mounting hole. The right end of the lowest power transmission board 1 71, the middle of the middle power transmission board 1 71 and the left end of the uppermost power transmission board 1 71 are all connected with the power transmission frame 72 by bolts. There is a gap between the power transmission frame 72 fixed on the power transmission board 1 71 and the other two power transmission boards 1 71. The lower ends of the three groups of power transmission frames 72 are adjacent to the upper ends. The contact pieces are connected by bolts, and the middle part of the rear wall of the cabinet 1 is connected to the evenly distributed power racks 74 through rubber insulating columns. The two transversely adjacent power transmission racks 72 and the two transversely adjacent power racks 74 are connected by insulating support plates 73. The three contact pieces at the lower end are respectively connected to the adjacent power racks 74 by bolts. The front ends of the power racks 74 are provided with connection holes 75. Remove the mounting plate 14, install the three live wires on the leftmost ends of the three power transmission boards 71 ​​on the mounting frame at the upper end of the cabinet 1, and install the ground wire and the neutral wire on the leftmost end of the power transmission board 71 on the mounting frame at the lower end of the cabinet 1. The electrician pulls the cabinet door handle 3, opens the cabinet door 2, installs the input wires of the external electrical appliances to the connection holes 75 at the lower end of the power rack 74, and closes the cabinet door 2.

[0030] The application further comprises a PLC controller 16 arranged on the right side of the cabinet shell 1, the input end of the PLC controller 16 is electrically connected with an external power supply, the input end of the circuit breaker 5 is electrically connected with the output end of the PLC controller 16, the application further comprises a current sensor one 6 and a current sensor two 15, the current sensor one 6 is fixedly installed on the upper end of the rear wall of the cabinet shell 1, the current sensor two 15 is respectively fixedly installed on the lower end of the rear wall of the cabinet shell 1, the power distribution frame 74 respectively passes through the middle part of the adjacent current sensor two 15, the current sensor one 6 is respectively connected in series with the upper end of the power supply frame 72, the upper end of the cabinet shell 1 is provided with a support 12, the support 12 is located on the upper end of the L-shaped support 11, the upper end of the support 12 is provided with an operation opening corresponding to the current sensor one 6, the current sensor one 6 and the current sensor two 15 are bidirectionally electrically connected with the PLC controller 16, the left end of the support 12 is respectively fixedly installed with a wire box 10, the right side surface of the wire box 10 on the left end and the upper side surface of the wire box 10 on the right end are respectively provided with a wire groove 9, the front side surface of the vertical plate of the support 12 is respectively provided with a fuse 8, the input end of the fuse 8 is connected with the output end of the vertically adjacent current sensor one 6 through a wire, the current in the three live wires flows to the power supply frame 72 through the power supply plate one 71, the current of the power supply frame 72 flows to the circuit breaker 5 and the current sensor one 6, at this time, the circuit breaker 5 is in an open state, when the current sensor one 6 senses that the inflowing current is normal, the current sensor one 6 sends an electric signal to the PLC controller 16, the PLC controller 16 controls the circuit breaker 5 to be closed, the current flows from the contact of the rear end of the circuit breaker 5 to the power distribution frame 74, when the current flows out from the circuit breaker 5 and is detected by the current sensor two 15 for the second time, the current sensor two 15 finds that the current has a problem, the current sensor two 15 sends an electric signal to the PLC controller 16, the PLC controller 16 controls the circuit breaker 5 to be opened, when the circuit breaker 5 has a fault, the circuit breaker 5 cannot be automatically opened, the thermal fuse 8 can be high-temperature opened, further protecting the circuit of the power distribution cabinet, the PLC controller 16 can send the detected current voltage to the display 18 at any time, under normal conditions, the PLC controller 16 can artificially control the opening and closing of the circuit breaker 5, through multiple detections, high voltage and low voltage can be rapidly detected and processed, the high voltage and low voltage can be rapidly and intelligently automatically processed, and the electrical elements are protected.

[0031] The working principle of an electrical low-voltage distribution cabinet provided by the present invention is as follows: an electrician inserts a high-voltage cable into the interior of the cabinet shell 1 through the line entry hole 13, removes the mounting plate 14, and installs the three live wires on the leftmost end of the three power transmission boards 71 ​​on the mounting frame at the upper end of the cabinet shell 1, and installs the ground wire and the neutral wire on the leftmost end of the power transmission board 71 on the mounting frame at the lower end of the cabinet shell 1. The electrician pulls the cabinet shell door handle 3 to open the cabinet shell door 2, installs the input end wires of the external electrical appliance on the connection hole 75 at the lower end of the power rack 74, closes the cabinet shell door 2, and the current inside the three live wires flows through the power transmission board 71 to the power transmission rack 72. The electricity of the power transmission rack 72 flows to the circuit breaker 5 and the current sensor 6 respectively. At this time, the circuit breaker 5 is in the disconnected state. When the current sensor 6 senses that there is no problem with the inflowing current, the current sensor 6 sends an electrical signal to the PLC controller 16. The PLC controller 16 controls the circuit breaker 5 to close, and the current flows from the contact piece at the rear end of the circuit breaker 5 to the drain rack 74, and the current flows to the connection hole 75 at the front end of the drain rack 74. When the current flows out of the circuit breaker 5 and passes through the current sensor 2 15 for secondary detection, the current sensor 2 15 finds that there is a problem with the current. The current sensor 2 15 transmits the electrical signal to the PLC controller 16, and the PLC controller 16 controls the circuit breaker 5 to disconnect. When the circuit breaker 5 fails, the circuit breaker 5 will not disconnect automatically, and the fuse 8 will disconnect at high temperature, further protecting the distribution cabinet circuit. The PLC controller 16 will transmit the current and voltage at the detection point to the display 18 at any time. When everything is normal, the PLC controller 16 can manually control the disconnection and closing of the circuit breaker 5. The heat dissipation filter 4 on the left and right sides of the cabinet shell 1 is used for ventilation inside the cabinet shell to avoid overheating.

[0032] It is worth noting that the circuit breaker 5 disclosed in the above embodiment can be MTZ1, the current sensor 1 6 can be HIT30, the fuse 8 can be RT18-32X, the current sensor 2 15 can be WHB-C15D, the PLC controller 16 can be DU2002, and the display 18 can be XP10BKA. The PLC controller 16 controls the circuit breaker 5, the current sensor 1 6, the current sensor 2 15 and the display 18 using methods commonly used in the prior art.

[0033] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An electrical low-voltage distribution cabinet, characterized in that: It includes a cabinet shell (1), a circuit breaker (5) and a power transmission mechanism (7); Cabinet shell (1): A U-shaped bracket (11) is installed in the center of its interior by bolts, and corresponding mounting brackets (19) are fixedly installed at the upper and lower ends of the rear wall of the cabinet shell (1); Circuit breaker (5): It is installed in the middle of the upper side of the U-shaped bracket (11), and contact pieces one are provided at the input and output contacts on the rear side of the circuit breaker (5); Power transmission mechanism (7): It is respectively arranged at the upper ends of the mounting brackets (19), and the power transmission mechanism (7) is installed in cooperation with the contact pieces one of the circuit breaker (5); Among them: It further includes a PLC controller (16), the PLC controller (16) is arranged on the right side of the cabinet shell (1), the input end of the PLC controller (16) is electrically connected to an external power supply, and the input end of the circuit breaker (5) is electrically connected to the output end of the PLC controller (16).

2. An electrical low-voltage distribution cabinet according to claim 1, characterized in that: The power transmission mechanism (7) includes a power transmission plate one (71), a power transmission frame (72), an insulating support plate (73), a discharge frame (74), a connection hole (75) and a power transmission plate two (76). The power transmission plate one (71) is respectively fixedly installed in the middle of the upper mounting bracket (19), the power transmission plate two (76) is respectively fixedly installed in the middle of the lower mounting bracket (19), mounting holes are opened at the rightmost sides of the power transmission plate two (76), the right end of the lowermost power transmission plate one (71), the middle of the middle power transmission plate one (71) and the left end of the uppermost power transmission plate one (71) are respectively connected with the power transmission frame (72) by bolts. The power transmission frame (72) fixed on the power transmission plate one (71) has a gap with the other two power transmission plates one (71). The lower ends of the three groups of power transmission frames (72) are respectively connected with the adjacent contact pieces one at the upper end by bolts. The middle part of the rear wall of the cabinet shell (1) is connected with uniformly distributed discharge frames (74) through rubber insulating columns. The insulating support plate (73) is connected between two horizontally adjacent power transmission frames (72) and between two horizontally adjacent discharge frames (74). The three lower contact pieces one are respectively connected with the adjacent discharge frames (74) by bolts, and connection holes (75) are opened at the front ends of the discharge frames (74).

3. An electrical low-voltage distribution cabinet according to claim 2, characterized in that: It further includes a current sensor one (6) and a current sensor two (15). The current sensor one (6) is fixedly installed at the upper end of the rear wall of the cabinet shell (1), the current sensor two (15) is respectively fixedly installed at the lower end of the rear wall of the cabinet shell (1). The discharge frames (74) respectively pass through the middle parts of the adjacent current sensors two (15). The current sensor one (6) is respectively connected in series at the upper ends of the power transmission frames (72). A bracket (12) is arranged at the upper end of the cabinet shell (1), the bracket (12) is located at the upper end of the U-shaped bracket (11), and an operation port corresponding to the current sensor one (6) is opened at the upper end of the bracket (12). The current sensor one (6) and the current sensor two (15) are both bidirectionally electrically connected to the PLC controller (16).

4. An electrical low-voltage distribution cabinet according to claim 3, characterized in that: A wire box (10) is fixedly mounted on the left end of the bracket (12), and a wire groove (9) is provided on the right side surface of the wire box (10) at the left end and the upper side surface of the wire box (10) at the right end. A fuse (8) is provided on the front side surface of the vertical plate of the bracket (12), and the input end of the fuse (8) is connected to the output end of the longitudinally adjacent current sensor (6) through a wire.

5. The electrical low-voltage distribution cabinet according to claim 1, characterized in that: The cabinet case (1) is hingedly connected to a cabinet case door (2) on the left side of the front side thereof via a hinge, a cabinet case door handle (3) is mounted on the middle portion of the right end of the front side of the cabinet case door (2), and a display (18) is fixedly mounted on the middle portion of the upper end of the front side of the cabinet case door (2), and an input end of the display (18) is electrically connected to an output end of the PLC controller (16).

6. The electrical low-voltage distribution cabinet according to claim 1, characterized in that: A mounting plate (14) is mounted on the wiring port at the middle of the left end of the rear side of the cabinet shell (1) by means of bolts. The mounting plate (14) corresponds to the front-to-back position of the power transmission board (71) on the leftmost side of the upper end of the cabinet shell (1).

7. The electrical low-voltage distribution cabinet according to claim 1, characterized in that: Heat dissipation filters (4) are provided in the heat dissipation openings on both the left and right sides of the cabinet shell (1), and the two heat dissipation filters (4) are located in corresponding positions on the left and right sides.

8. The electrical low-voltage distribution cabinet according to claim 2, characterized in that: The rear end of the right side of the cabinet shell (1) is provided with a wire entry hole (13), and the wire entry hole (13) corresponds to the left and right positions of the power transmission board (71).

9. The electrical low-voltage distribution cabinet according to claim 1, characterized in that: A table corner (17) is provided at the lower end of the cabinet shell (1).

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