A power distribution box with overheat protection structure

Abstract

A power distribution box with an overheat protection structure comprises a chassis, a base and a top cover; the top cover is arranged on the top of the chassis, and a through hole for convenient ventilation is arranged at the connection between the top cover and the top of the chassis; air outlet slots are arranged on the front and rear sides of the top cover protruding from the chassis; the base is arranged at the bottom of the chassis, and a plurality of air inlet holes are arranged on the base; a support frame is arranged in the direction of the inside of the chassis toward the base; a plurality of ventilation slots are arranged at equal intervals on the support frame; a fan is arranged below the support frame; the fan blows the gas outside the chassis into the chassis through the air inlet holes, and blows air upwards through the ventilation slots on the support frame; a matching movable seat is arranged on the support frame; a plurality of sealing plugs are arranged at equal intervals on the movable seat; a plurality of sets of matching connectors are arranged on the movable seat; a control board is arranged in the chassis, and an upper controller is integrated inside the control board; signal lines extending upward and downward are arranged on the control board, and thermocouples are installed at the ends of the signal lines.

Description

Technical Field

[0001] The invention relates to the technical field of distribution boxes, and in particular to a power distribution box with an overheat protection structure. Background Art

[0002] The distribution box is an electrical equipment with the characteristics of small size, easy installation, special technical performance, fixed position, unique configuration function, no site restrictions, wide application, stable and reliable operation, high space utilization, small footprint and environmental protection.

[0003] The massive parameters on the distribution box data generally constitute the low-voltage forest. According to the electrical wiring, it is required to assemble the switchgear, measuring instruments, protective electrical appliances and auxiliary equipment in a closed or semi-closed metal cabinet or on a screen to form a low-voltage distribution box. During normal operation, the circuit can be connected or disconnected by manual or automatic switches; the distribution box in the prior art does not have overheating protection. Once the heat accumulated in the chassis is too much and cannot be dissipated, there will be a risk of short circuit and spontaneous combustion; once a fire occurs, it will bring great economic losses.

[0004] In order to solve the above problems, the present application proposes a power distribution box with an overheating protection structure. Summary of the invention

[0005] (I) Purpose of the invention

[0006] In order to solve the technical problem that the distribution box in the prior art does not have overheat protection, once too much heat accumulates in the box and cannot be dissipated, there will be a risk of short circuit and spontaneous combustion; once a fire occurs, it will cause great economic losses. The present invention proposes a power distribution box with an overheat protection structure.

[0007] (II) Technical solution

[0008] In order to solve the above problems, the present invention provides a power distribution box with an overheat protection structure, comprising a box, a base and a top cover;

[0009] The chassis is provided with an openable door panel; the interior of the chassis is hollow, forming a space for installing electrical equipment; the door panel covers the opening of the hollow part of the chassis and forms a sealing structure;

[0010] The top cover is arranged on the top of the chassis, and a through hole for convenient ventilation is arranged at the connection between the top cover and the top of the chassis; the top cover protrudes from the front and rear sides of the chassis and is provided with air outlet slots;

[0011] The base is arranged at the bottom of the chassis, and a plurality of air inlets are arranged on the base; a support frame is arranged inside the chassis in the direction toward the base; a plurality of ventilation slots are arranged at equal intervals on the support frame; a fan is arranged below the support frame; the air inlet on the base is connected to the inside of the chassis; the fan blows the gas outside the chassis into the chassis through the air inlet, and blows the air upward through the ventilation slots on the support frame;

[0012] The support frame is provided with a matching movable seat; a plurality of sealing plugs are provided on the movable seat at equal intervals, and the sealing plugs cooperate with the ventilation slots on the support frame to maintain a sealed state; a plurality of matching connecting pieces are provided on the movable seat; and the connecting pieces drive the movable seat to move up and down;

[0013] A control board is provided in the chassis, and an upper controller is integrated inside the control board; signal lines extending upward and downward are provided on the control board, and thermocouples are installed at the ends of the signal lines; the thermocouple located at the upper part is installed at the through hole; the thermocouple located at the lower part is installed at the ventilation slot; the thermocouple is connected to the upper controller signal in the control board.

[0014] Preferably, the air outlet slots and the ventilation slots on the support frame are covered with dust-proof filters.

[0015] Preferably, a mounting frame is provided inside the chassis, and a plurality of bolt holes are preset on the mounting frame for facilitating installation with electrical equipment.

[0016] Preferably, the mounting frame and the control panel are not in contact with each other, and an air passage is formed between the mounting frame and the control panel to facilitate gas flow.

[0017] Preferably, the connecting member includes a fixed column, a contact seat, a fixed seat and a movable bolt; the fixed column is vertically arranged on the support frame; the fixed seat is arranged parallel to the top of the fixed column and the fixed seat is fixedly installed with the bottom of the support frame; the movable bolt is inserted into the fixed column and slides up and down along the fixed column; the top of the movable bolt is fixedly installed with the bottom of the fixed seat; an elastic member is wrapped around the outer periphery of the movable bolt, and a contact seat is arranged on the fixed column; the top of the elastic member is fixedly installed with the fixed seat, and the bottom is fixedly installed with the contact seat; the contact seat is telescoped up and down along the vertical direction.

[0018] Preferably, the contact seat has a built-in magnet, and the fixing seat is an electromagnet; the upper controller controls the electromagnet to be energized or de-energized.

[0019] Preferably, the electromagnet is energized and maintains magnetic repulsion with the magnet; and the electromagnet is de-energized and maintains magnetic attraction with the magnet.

[0020] Preferably, the magnetic attraction force of the electromagnet is greater than the elastic force of the elastic member.

[0021] Preferably, fire extinguishing components are fixedly arranged at the four corners of the chassis; and the upper controller controls the activation of the fire extinguishing components.

[0022] Preferably, the fire extinguishing assembly includes an outer shell and a protective film, a powder filling layer in the middle and an airbag inside; the airbag is arranged in a cylindrical shape; the shell and the protective film form a cylindrical structure; a space convenient for filling powder is formed in the shell, the protective film and the middle interlayer of the airbag; a plurality of fuses are arranged inside the fire extinguishing assembly, and the fuses are in contact with the protective film and the airbag; the upper controller controls the current passing through the fuses.

[0023] The above technical solution of the present invention has the following beneficial technical effects:

[0024] 1. The fan installed inside the support frame can send the cold air outside the chassis into the chassis through the air inlet holes on the base and the ventilation slots on the support frame by blowing air. After exchanging heat with the heating elements in the chassis, the hot air flows upward; since there is no contact between the mounting frame and the control board, and an air passage is formed between the mounting frame and the control board to facilitate gas flow; the gas flow can also dissipate heat for the control board.

[0025] 2. The thermocouple located at the top is installed at the through-hole; the temperature is measured at the ventilation slot and the through-hole; based on the temperature difference between the two positions, it is determined whether the electrical equipment in the chassis is overheated; if overheating occurs, an alarm is issued through the control panel to alert the staff; the staff can manually control the removal of the load, reduce the number of equipment running and lower the temperature; in addition, the speed of the fan can be controlled to improve the effect of air cooling and avoid excessive temperature and equipment failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of the power distribution box with overheat protection structure proposed by the present invention.

[0027] Figure 2 This is a schematic diagram of the installation position structure of the control board in the power distribution box with overheat protection structure proposed by the present invention.

[0028] Figure 3 This is a schematic diagram of the bottom structure of the support frame in the power distribution box with overheat protection structure proposed by the present invention.

[0029] Figure 4 This is a schematic diagram of the internal structure of the support frame in the power distribution box with overheat protection structure proposed by the present invention.

[0030] Figure 5 This is an enlarged structural schematic diagram of the connector in the power distribution box with overheat protection structure proposed by the present invention.

[0031] Figure 6 This is a schematic cross-sectional structure diagram of a fire extinguishing assembly in a power distribution box with an overheat protection structure proposed by the present invention.

[0032] Figure numerals: 1. chassis; 2. top cover; 21. air outlet slot; 22. through hole; 3. fire extinguishing assembly; 31. shell; 32. protective film; 33. fuse; 34. powder filling layer; 35. air bag; 4. control board; 41. signal line; 5. mounting frame; 6. base; 7. support frame; 71. ventilation slot; 72. fan; 73. movable seat; 74. sealing plug; 8. connector; 81. fixed seat; 82. elastic member; 83. movable bolt; 84. contact seat; 85. fixing column. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0034] Example 1

[0035] like Figure 1-3 As shown, a power distribution box with an overheat protection structure proposed by the present invention includes a box 1, a base 6 and a top cover 2;

[0036] The chassis 1 is provided with an openable door panel; the interior of the chassis 1 is hollow, forming a space for installing electrical equipment; the door panel covers the opening of the hollow part of the chassis 1, and forms a sealing structure;

[0037] The top cover 2 is arranged on the top of the chassis 1, and a through hole 22 for convenient ventilation is arranged at the connection between the top cover 2 and the top of the chassis 1; the top cover 2 is protruded from the chassis 1 and the front and rear sides are provided with air outlet slots 21;

[0038] The base 6 is arranged at the bottom of the chassis 1, and a plurality of air inlet holes are arranged on the base 6; a support frame 7 is arranged inside the chassis 1 in the direction toward the base 6; a plurality of ventilation slots 71 are arranged at equal intervals on the support frame 7; a fan 72 is arranged below the support frame 7; the air inlet holes on the base 6 are connected to the inside of the chassis 1; the fan 72 blows the gas outside the chassis 1 into the chassis 1 through the air inlet holes, and blows the air upward through the ventilation slots 71 on the support frame 7;

[0039] The support frame 7 is provided with a matching movable seat 73; a plurality of sealing plugs 74 are provided on the movable seat 73 at equal intervals, and the sealing plugs 74 cooperate with the ventilation slots 71 on the support frame 7 to maintain a sealed state; a plurality of matching connecting members 8 are provided on the movable seat 73; the connecting members 8 drive the movable seat 73 to move up and down;

[0040] A control board 4 is provided in the chassis 1, and an upper controller is integrated inside the control board 4; a signal line 41 extending upward and downward is provided on the control board 4, and a thermocouple is installed at the end of the signal line 41; the thermocouple located at the upper part is installed at the through hole 22; the thermocouple located at the lower part is installed at the ventilation slot 71; the thermocouple is connected to the upper controller signal in the control board 4.

[0041] It should be noted that the mounting frame 5 inside the chassis 1 is convenient for installation with the electrical equipment to be installed in the distribution box; a plurality of bolt holes are preset on the mounting frame 5, which makes it more convenient to install the equipment; the fan 72 arranged inside the support frame 7 can blow the cold air outside the chassis 1 into the chassis 1 through the air inlet holes on the base 6 and the ventilation slots 71 on the support frame 7, and the hot air flows upward after exchanging heat with the heating elements in the chassis; since there is no contact between the mounting frame 5 and the control board 4, and an air passage is formed between the mounting frame 5 and the control board 4 to facilitate the flow of gas; when the gas flows, it can also dissipate heat for the control board 4; a through hole 22 for convenient ventilation is provided at the connection between the top cover 2 and the top of the chassis 1; the top cover 2 protrudes from the front and rear sides of the chassis 1 An air outlet slot 21 is provided, and the gas after heat exchange is discharged outward from the air outlet slot 21 on the top cover 2 through the through hole 22; in the present invention, a signal line 41 extending upward and downward is provided on the control board 4, and a thermocouple is installed at the end of the signal line 41; the thermocouple located at the upper part is installed at the through hole 22; the temperature is measured at the ventilation slot 71 and the through hole 22; according to the temperature difference between the two positions, it is judged whether the electrical equipment in the chassis 1 is overheated; if overheating occurs, an alarm is issued through the control board 4 to prompt the staff to pay attention; the staff can manually control the removal of the load, reduce the number of equipment running and reduce the temperature; in addition, the speed of the fan 72 can also be controlled to improve the effect of air cooling and avoid excessive temperature and equipment failure.

[0042] Example 2

[0043] The movable seat 73 is provided with a plurality of matching connecting members 8; the connecting members 8 drive the movable seat 73 to move up and down, and the connecting members 8 include a fixed column 85, a contact seat 84, a fixed seat 81 and a movable bolt 83; the fixed column 85 is vertically arranged on the support frame 7; the fixed seat 81 is arranged parallel to the upper part of the fixed column 85 and the fixed seat 81 is fixedly installed with the bottom of the support frame 7; the movable bolt 83 is inserted into the fixed column 85 and slides up and down along the fixed column 85; the top of the movable bolt 83 is fixedly installed with the bottom of the fixed seat 81; an elastic member 82 is wound around the outer periphery of the movable bolt 83, and a contact seat 84 is arranged on the fixed column 85; the top of the elastic member 82 is fixedly installed with the fixed seat 81, and the bottom is fixedly installed with the contact seat 84; the contact seat 84 stretches up and down along the vertical direction. The contact seat 84 has a built-in magnet, and the fixed seat 81 is an electromagnet; the upper controller controls the electromagnet to be energized or de-energized. When the electromagnet is energized, it repulses the magnet magnetically; when the electromagnet is de-energized, it attracts the magnet magnetically. The magnetic attraction force of the electromagnet is greater than the elastic force of the elastic member 82;

[0044] It should be noted that when the temperature difference detected by the thermocouples on the upper and lower sides is too large and it is judged that a fire has occurred, the upper controller controls the electromagnet to lose power. At this time, the electromagnet loses power and maintains magnetic attraction with the magnet, and the contact seat 84 and the fixed seat 81 are adsorbed together. At this time, the movable bolt 83 is inserted into the interior of the fixed column 85, and the elastic member 82 remains in a compressed state. Since the fixed seat 81 is fixedly installed with the bottom of the support frame 7, the entire movable seat 73 will move upward at this time, and the ventilation slot 71 on the support frame 7 will be kept in a closed state through the sealing plug 74 on the movable seat 73. At this time, external oxygen is prevented from entering the interior of the chassis 1, thereby reducing the oxygen content in the chassis 1 and suppressing the continued burning of the flame.

[0045] Example 3

[0046] Fire extinguishing components 3 are fixedly installed at the four corners of the chassis 1; the upper controller controls the activation of the fire extinguishing component 3, and the fire extinguishing component 3 includes an external shell 31 and a protective film 32, a middle powder filling layer 34 and an internal air bag 35; the air bag 35 is arranged in a cylindrical shape; the shell 31 and the protective film 32 form a cylindrical structure; a space convenient for filling powder is formed in the middle interlayer of the shell 31, the protective film 32 and the air bag 35; a plurality of fuses 33 are arranged inside the fire extinguishing component 3, and the fuses 33 are in contact with the protective film 32 and the air bag 35; the upper controller controls the current passing through the fuses 33.

[0047] It should be noted that when the temperature difference detected by the thermocouples on the upper and lower sides is too large and it is judged that a fire has occurred, the upper controller controls the fuse 33 in each fire extinguishing component 3 to generate high temperature to fuse the airbag 35 and the protective film 32; after the airbag 35 is broken, the gas therein overflows rapidly, and the fire extinguishing dry powder filled in the powder filling layer 34 is sprayed out from the cracks in the protective film 32; the fire extinguishing dry powder can evenly cover the fire site, and can isolate the flammable materials and the fire point, thereby preventing the fire from spreading and causing greater damage.

[0048] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A power distribution box with an overheat protection structure, characterized in that: It comprises a chassis (1), a base (6) and a top cover (2); An openable door panel is provided on the chassis (1); The interior of the case (1) is hollow, forming a space for installing electrical equipment; the door panel covers the opening of the hollow part of the case (1) to form a sealing structure; The top cover (2) is arranged on the top of the chassis (1), and a through hole (22) for convenient ventilation is arranged at the connection between the top cover (2) and the top of the chassis (1); air outlet slots (21) are arranged on the front and rear sides of the top cover (2) protruding from the chassis (1); The base (6) is arranged at the bottom of the chassis (1), and a plurality of air inlet holes are arranged on the base (6); a support frame (7) is arranged inside the chassis (1) in a direction toward the base (6); a plurality of ventilation slots (71) are arranged at equal intervals on the support frame (7); a fan (72) is arranged below the support frame (7); the air inlet holes on the base (6) are connected to the inside of the chassis (1); the fan (72) blows air outside the chassis (1) into the chassis (1) through the air inlet holes, and blows air upwards through the ventilation slots (71) on the support frame (7); A matching movable seat (73) is arranged on the support frame (7); a plurality of sealing plugs (74) are arranged on the movable seat (73) at equal intervals, and the sealing plugs (74) cooperate with the ventilation slots (71) on the support frame (7) to maintain a sealed state; a plurality of matching connecting members (8) are arranged on the movable seat (73); and the connecting members (8) drive the movable seat (73) to move up and down; A control panel (4) is arranged in the chassis (1), and a host controller is integrated inside the control panel (4); a signal line (41) extending upward and downward is arranged on the control panel (4), and thermocouples are installed at the ends of the signal line (41); the thermocouple located at the upper part is installed at the through hole (22); the thermocouple located at the lower part is installed at the ventilation slot (71); the thermocouple is connected to the signal of the host controller in the control panel (4); The connecting member (8) comprises a fixing column (85), a contact seat (84), a fixing seat (81) and a movable bolt (83); the fixing column (85) is vertically arranged on the support frame (7); the fixing seat (81) is arranged parallel to the top of the fixing column (85) and the fixing seat (81) and the bottom of the support frame (7) are fixedly installed; the movable bolt (83) is inserted into the fixing column (85) and slides up and down along the fixing column (85); the top of the movable bolt (83) is fixedly installed with the bottom of the fixing seat (81); the outer periphery of the movable bolt (83) is An elastic member (82) is wound around the fixing column (85), and a contact seat (84) is arranged on the fixing column (85); the top of the elastic member (82) is fixedly mounted on the fixing seat (81), and the bottom is fixedly mounted on the contact seat (84); the contact seat (84) is retracted up and down along the vertical direction; the contact seat (84) has a built-in magnet, and the fixing seat (81) is an electromagnet; the upper controller controls the electromagnet to be energized or de-energized; when the electromagnet is energized, it maintains magnetic repulsion with the magnet; when the electromagnet is de-energized, it maintains magnetic attraction with the magnet; the magnetic attraction force of the electromagnet is greater than the elastic force of the elastic member (82); The four corners of the chassis (1) are all fixedly provided with fire extinguishing components (3); the upper controller controls the activation of the fire extinguishing components (3); the fire extinguishing components (3) include an outer shell (31) and a protective film (32), a powder filling layer (34) in the middle, and an air bag (35) in the inside; the air bag (35) is arranged in a cylindrical shape; the shell (31) and the protective film (32) form a cylindrical structure; a space convenient for filling powder is formed in the middle interlayer of the shell (31), the protective film (32) and the air bag (35); a plurality of fuses (33) are arranged inside the fire extinguishing components (3), and the fuses (33) are in contact with the protective film (32) and the air bag (35); the upper controller controls the current passing through the fuses (33); When the temperature difference detected by the thermocouples on the upper and lower sides is too large and it is judged that a fire has occurred, the upper controller controls the electromagnet to lose power. At this time, the electromagnet loses power and maintains magnetic attraction with the magnet, the contact seat (84) and the fixed seat (81) are adsorbed, the movable bolt (83) is inserted into the interior of the fixed column (85), and the elastic member (82) remains in a compressed state; the entire movable seat (73) moves upward, and the ventilation slot (71) on the support frame (7) is kept in a closed state through the sealing plug (74) on the movable seat (73), thereby reducing the oxygen content in the chassis (1); at the same time, the upper controller controls the fuse (33) in each fire extinguishing component (3) to generate high temperature to fuse the air bag (35) and the protective film (32); after the air bag (35) is broken, the gas therein quickly overflows, and the fire extinguishing dry powder filled in the powder filling layer (34) is sprayed out from the cracks of the protective film (32); the fire extinguishing dry powder covers the fire location to isolate the flammable material and the fire point.

2. The power distribution box with overheat protection structure according to claim 1, characterized in that: The air outlet slot (21) and the ventilation slot (71) on the support frame (7) are both covered with dust-proof filters.

3. The power distribution box with overheat protection structure according to claim 1, characterized in that: A mounting frame (5) is arranged inside the chassis (1), and a plurality of bolt holes for facilitating installation with electrical equipment are preset on the mounting frame (5).

4. The power distribution box with overheat protection structure according to claim 3 is characterized in that: The mounting frame (5) and the control panel (4) are not in contact with each other, and an air passage is formed between the mounting frame (5) and the control panel (4) to facilitate the flow of gas.

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