Combined high-voltage frequency converter
By introducing automatic fire extinguishing components and holding mechanisms into the inverter cabinet, the fire problem caused by overheating of the inverter is solved, and the safety and fireproof effect of the inverter is achieved.
Patent Information
- Application Number
- CN202510096448.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2025-04-15
AI Technical Summary
Existing inverter cabinets are prone to fire when the inverter is overheated, and lack automatic fire extinguishing function, resulting in a high risk of fire spread.
A combined high-voltage inverter is designed, including a frequency converter cabinet and automatic fire extinguishing components. The inverter cabinet is equipped with automatic fire extinguishing components, including high-pressure inert gas tanks and thermally sensitive glass tubes. When the temperature is too high, the automatic fire extinguishing component sprays fire extinguishing fluid and cuts off the electrical connection between the inverter and external equipment through the holding mechanism.
It effectively prevents fires caused by overheating of the inverter, and ensures safety by cutting off the electrical connection, reducing the risk of fire spread.
Smart Images
Figure CN119818874A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of frequency converters, and in particular to a combined high-voltage frequency converter. Background Art
[0002] The inverter is a power control device that uses frequency conversion technology and microelectronics technology. It controls the operation of AC motors by changing the frequency of the motor's working power supply. The inverter is mainly composed of rectification (AC to DC), filtering, inversion (DC to AC), braking unit, drive unit, detection unit and microprocessor unit. The inverter changes the frequency and voltage of the power supply to provide the required power supply voltage according to the actual needs of the motor, thereby achieving the purpose of energy saving and speed regulation, and has protection functions such as overcurrent, overvoltage and overload.
[0003] In the prior art, the inverter is generally arranged in the inverter cabinet, but the structure of the existing inverter cabinet is relatively simple, and the inverter is prone to overheating during operation. When the temperature of the inverter reaches the upper limit, it is easy to cause a fire due to overheating. The existing inverter cabinet usually does not have the function of automatic fire extinguishing. After the fire occurs, it is easy to continue to burn along the wires, thereby causing large-scale fires in other electrical equipment connected to the inverter. Therefore, it is necessary to improve the design of related technologies. Summary of the invention
[0004] In order to solve the above problems, the present invention provides a combined high-voltage frequency converter.
[0005] The above technical objectives of the present invention are achieved through the following technical solutions: a combined high-voltage inverter, including an inverter cabinet and an inverter body arranged in the inverter cabinet, an internal connector electrically connected to the inverter body is fixed on the side wall of the inverter cabinet, and the inverter cabinet is provided with an automatic fire extinguishing component for spraying fire extinguishing fluid in the inverter cabinet when the temperature in the inverter cabinet is too high, a mounting plate is provided on the outside of the inverter cabinet, and an external connector electrically connected to other electrical equipment is fixed on the mounting plate, and the inverter cabinet is also provided with a flexible electrical connection component for electrically connecting the external connector with the internal connector, a tension spring for connecting to the flexible electrical connection component, and a retaining mechanism for limiting the flexible electrical connection component, the retaining mechanism loses the limit on the connection of the flexible electrical connection component under the action of the fire extinguishing fluid sprayed by the automatic fire extinguishing component, so that the flexible electrical connection component is separated from the external connector under the action of the tension spring.
[0006] Furthermore, the automatic fire extinguishing assembly includes a high-pressure inert gas tank detachably mounted on the top of the frequency converter cabinet and a feed pipe fixed to and connected with the nozzle of the high-pressure inert gas tank, the feed pipe is vertically arranged, passes through the top of the frequency converter cabinet and cooperates with the frequency converter cabinet, a sealing plate is arranged on the inner wall of the feed pipe near its lower end, the automatic fire extinguishing assembly also includes a Y-shaped mounting frame fixed to the outer wall of the feed pipe near its lower end, and a thermosensitive glass tube arranged between the Y-shaped mounting frame and the sealing plate, the two ends of the thermosensitive glass tube are respectively pressed against the sealing plate and the Y-shaped mounting frame.
[0007] Furthermore, the flexible electrical connection assembly includes a first right-angled triangle block fixed on the outer wall of the inverter cabinet, a first connecting rod hinged to a side of the first right-angled triangle block away from the inverter cabinet, an isosceles triangle block hinged to an end of the first connecting rod away from the first right-angled triangle block, a second connecting rod hinged to a side of the isosceles triangle block away from the inverter cabinet, a second right-angled triangle block hinged to a side of the second connecting rod away from the inverter cabinet, a vertical plate fixed to a side of the second right-angled triangle block away from the inverter cabinet and parallel to the mounting plate, a connector that passes through and is fixed on the vertical plate, and an electric wire connected to the connector and the internal connector, wherein one end of the connector away from the inverter cabinet is plugged into and matched with an end of the external connector close to the inverter cabinet; the top of the first right-angled triangle block and the top of the second right-angled triangle block are both horizontal planes, and the second right-angled triangle block is The triangle block and the first right-angle triangle block are mirror-imaged with respect to the isosceles triangle block. Two first connecting rods are provided on the same side of the first right-angle triangle block and are parallel to each other. One end of the first connecting rod on the lower side is hinged to the first right-angle triangle block near its bottom, and the other end of the first connecting rod on the lower side is hinged to the isosceles triangle block near its bottom. One end of the tension spring is movably connected to the outer wall of the inverter cabinet, and the other end of the tension spring is movably connected to the hinge axis between the isosceles triangle block and the first connecting rod on the upper side. The second connecting rods are arranged in groups, and the two second connecting rods in the same group are hinged to the second right-angle triangle block and are parallel to each other. The second connecting rod on the lower side and the first connecting rod on the lower side are mirror images of each other with respect to the isosceles triangle block, and the second connecting rod on the upper side and the first connecting rod on the upper side are respectively located on both sides of the isosceles triangle block.
[0008] Furthermore, the retaining mechanism includes a retaining component and a fixing component, the retaining component includes a vertical plate fixed to the inner wall of the inverter cabinet, a horizontal bar penetrating the vertical plate and slidingly matched with the vertical plate, a connecting plate fixed to one end of the horizontal bar close to the first right-angle triangle block, a limiting plate fixed to one side of the connecting plate close to the first right-angle triangle block, an end plate fixed to one end of the horizontal bar away from the first right-angle triangle block, and a spring sleeved on the horizontal bar and fixed between the end plate and the vertical plate, the limiting plate penetrates the side wall of the inverter cabinet and slides together, when the connector is plugged in and matched with the external connector, the bottom surface of the limiting plate abuts against the top of the first connecting rod to maintain the electrical connection between the connector and the external connector, and the fixing component keeps the connecting plate relatively fixed under the joint action of the tension spring and the spring.
[0009] Furthermore, the fixing assembly includes a Z-shaped plate body fixed on the top wall inside the inverter cabinet, an inclined rod fixed to the side of the middle section of the Z-shaped plate body close to the inverter body, a hook hinged to the lower end of the inclined rod and buckled to the side of the top of the connecting plate away from the inverter body, and a sealing plate fixed to one end of the hook close to the inverter body, the Y-shaped mounting frame is located between the Z-shaped plate body and the inner wall of the inverter cabinet, and the sealing plate is arranged near the bottom of the Z-shaped plate body.
[0010] Furthermore, a limiting block is fixed on the top of the limiting plate, and when the connector is separated from the external connector, the side wall of the limiting block close to the inverter body is pressed against the outer wall of the inverter cabinet.
[0011] Furthermore, ventilation holes are provided on the side walls on both sides of the inverter cabinet.
[0012] Furthermore, a blocking component for blocking the ventilation hole in the event of a fire is provided in the inverter cabinet, and the blocking component includes a mounting rod fixed on the top wall of the inverter cabinet, a rotating block sleeved on the mounting rod and matched with the mounting rod, a Z-shaped rod body fixed on the rotating block, a swing rod hinged to the inner wall of the inverter cabinet, and a cover plate hinged to the lower end of the swing rod, the swing rods are provided with two and are parallel to each other, and the lower end of the swing rod on the lower side is hinged to the side wall of the cover plate near the middle thereof; when the connecting head is plugged into and matched with the external connector, the side of the upper section of the Z-shaped rod body close to the first right-angle triangle block abuts against the side of the connecting plate away from the first right-angle triangle block, and the side of the lower end of the Z-shaped rod body away from the inverter body is arranged close to the cover plate, and when the connecting head is detached from the external connector, the side of the cover plate away from the inverter body abuts against the inner wall of the inverter cabinet.
[0013] In summary, the present invention has the following beneficial effects: 1. In this application, when the frequency converter is in normal use, the flexible electrical connection component electrically connects the external connector with the internal connector to complete the electrical connection between the frequency converter and the external electrical equipment. The frequency converter adjusts the high voltage output of the power supply to a low voltage suitable for the electrical equipment. When the frequency converter causes a fire due to overheating, the automatic fire extinguishing component sprays the fire extinguishing fluid into the frequency converter cabinet to extinguish the fire. At the same time, the retaining mechanism loses the limit on the connection of the flexible electrical connection component under the action of the fire extinguishing fluid sprayed by the automatic fire extinguishing component, so that the flexible electrical connection component is separated from the external connector under the action of the tension spring, cutting off the connection between the frequency converter and the power supply and electrical equipment, ensuring safety; 2. In the present application, when the inverter causes a fire due to overheating, the thermosensitive glass tube is made of thermosensitive glass material commonly used in fire-fighting equipment, which is consistent with the structure and principle of the thermosensitive glass tube of the fire sprinkler head. After the thermosensitive glass tube bursts due to heat, it loses its barrier to the sealing sheet. The high-pressure inert gas in the high-pressure inert gas tank is transported to the inverter cabinet by the feed pipe and quickly fills the space inside the inverter cabinet. The combustion requires a large amount of oxygen. A large amount of inert gas plays a role in extinguishing the fire, reduces the severity of the fire, and improves the safety of the inverter during use. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 It is a plan view for highlighting the internal structure of the frequency converter cabinet according to an embodiment of the present invention; Figure 3 yes Figure 2 The enlarged schematic diagram of point A in the middle; Figure 4 is a schematic diagram of a state in which the flexible electrical connection assembly in an embodiment of the present invention connects an external connector to an internal connector; Figure 5 is a schematic diagram of a state in which the flexible electrical connection component is separated from the external connector in an embodiment of the present invention; Figure 6 It is a schematic diagram of the structure of an embodiment of the present invention for highlighting a flexible electrical connection component.
[0015] In the figure: 1. inverter cabinet; 11. internal joint; 12. tension spring; 13. ventilation hole; 2. inverter body; 3. automatic fire extinguishing assembly; 31. high-pressure inert gas tank; 32. feed pipe; 33. Y-shaped mounting bracket; 34. thermal glass tube; 4. mounting plate; 41. external joint; 5. flexible electrical connection assembly; 51. first right-angle triangle block; 52. first connecting rod; 53. isosceles triangle block; 54. second connecting rod; 55. second right-angle triangle block; 56. vertical plate; 5 7. Connector; 58. Electric wire; 6. Holding mechanism; 61. Holding assembly; 611. Vertical plate; 612. Cross bar; 613. Connecting plate; 614. Limiting plate; 6141. Limiting block; 615. End plate; 616. Spring; 62. Fixing assembly; 621. Z-shaped plate; 622. Oblique rod; 623. Hook; 624. Closing plate; 7. Closing assembly; 71. Mounting rod; 72. Rotating block; 73. Z-shaped rod; 74. Swinging rod; 75. Cover plate. DETAILED DESCRIPTION
[0016] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.
[0017] like Figure 1-6 As shown, the embodiment of the present application discloses a combined high-voltage inverter, including an inverter cabinet 1 and an inverter body 2 arranged in the inverter cabinet 1, an internal connector 11 electrically connected to the inverter body 2 is fixed on the side wall of the inverter cabinet 1, and an automatic fire extinguishing component 3 for spraying a fire extinguishing fluid in the inverter cabinet 1 when the temperature in the inverter cabinet 1 is too high is arranged on the inverter cabinet 1, a mounting plate 4 is arranged on the outer side of the inverter cabinet 1, and an external connector 41 electrically connected to other electrical equipment is fixed on the mounting plate 4, and a flexible electrical connection component 5 for electrically connecting the external connector 41 with the internal connector 11, a tension spring 12 for connecting to the flexible electrical connection component 5, and a retaining mechanism 6 for limiting the flexible electrical connection component 5 are also provided on the inverter cabinet 1, and the retaining mechanism 6 loses the limit on the connection with the flexible electrical connection component 5 under the action of the fire extinguishing fluid sprayed by the automatic fire extinguishing component 3, so that the flexible electrical connection component 5 is separated from the external connector 41 under the action of the tension spring 12. In this embodiment, ventilation holes 13 are provided on the side walls on both sides of the inverter cabinet 1 .
[0018] When the inverter is in normal use, the flexible electrical connection component 5 electrically connects the external connector 41 with the internal connector 11 to complete the electrical connection between the inverter and the external electrical equipment. The inverter adjusts the high voltage output of the power supply to a low voltage suitable for the electrical equipment. When the inverter causes a fire due to overheating, the automatic fire extinguishing component 3 sprays the fire extinguishing fluid into the inverter cabinet 1 to extinguish the fire. At the same time, the retaining mechanism 6 loses the limit of the connection of the flexible electrical connection component 5 under the action of the fire extinguishing fluid sprayed by the automatic fire extinguishing component 3, so that the flexible electrical connection component 5 is separated from the external connector 41 under the action of the tension spring 12, and the connection between the inverter and the power supply and electrical equipment is cut off, ensuring safety.
[0019] The automatic fire extinguishing assembly 3 includes a high-pressure inert gas tank 31 detachably mounted on the top of the frequency converter cabinet 1 and a delivery pipe 32 fixed to and connected with the nozzle of the high-pressure inert gas tank 31. The delivery pipe 32 is vertically arranged, passes through the top of the frequency converter cabinet 1 and cooperates with the frequency converter cabinet 1. A sealing sheet (not shown in the figure) is arranged on the inner wall of the delivery pipe 32 near its lower end. The automatic fire extinguishing assembly 3 also includes a Y-shaped mounting frame 33 fixed to the outer wall of the delivery pipe 32 near its lower end and a thermosensitive glass tube 34 arranged between the Y-shaped mounting frame 33 and the sealing sheet. The two ends of the thermosensitive glass tube 34 are respectively pressed against the sealing sheet and the Y-shaped mounting frame 33.
[0020] Specifically: when the inverter causes a fire due to overheating, the thermosensitive glass tube 34 is made of thermosensitive glass material commonly used in fire-fighting equipment, which is consistent with the structure and principle of the thermosensitive glass tube 34 of the fire sprinkler head. After the thermosensitive glass tube 34 bursts due to heat, it loses its barrier to the sealing sheet. The high-pressure inert gas in the high-pressure inert gas tank 31 is transported to the inverter cabinet 1 by the feed pipe 32 and quickly fills the space inside the inverter cabinet 1. Combustion requires a large amount of oxygen. A large amount of inert gas plays a role in extinguishing the fire, reduces the severity of the fire, and improves the safety of the inverter during use.
[0021] The flexible electrical connection assembly 5 includes a first right-angled triangle block 51 fixed on the outer wall of the inverter cabinet 1, a first connecting rod 52 hinged to the side of the first right-angled triangle block 51 away from the inverter cabinet 1, an isosceles triangle block 53 hinged to one end of the first connecting rod 52 away from the first right-angled triangle block 51, a second connecting rod 54 hinged to the side of the isosceles triangle block 53 away from the inverter cabinet 1, a second right-angled triangle block 55 hinged to the side of the second connecting rod 54 away from the inverter cabinet 1, a vertical plate 56 fixed to the side of the second right-angled triangle block 55 away from the inverter cabinet 1 and parallel to the mounting plate 4, a connector 57 penetrating and fixed on the vertical plate 56, and an electric wire 58 connected to the connector 57 and the internal connector 11, and the end of the connector 57 away from the inverter cabinet 1 is plugged into the end of the external connector 41 close to the inverter cabinet 1; the top of the first right-angled triangle block 51 and the top of the second right-angled triangle block 55 are both horizontal The second right-angled triangle block 55 and the first right-angled triangle block 51 are mirror-imaged with respect to the isosceles triangle block 53. Two first connecting rods 52 are provided on the same side of the first right-angled triangle block 51 and are parallel to each other. One end of the lower first connecting rod 52 is hinged to the first right-angled triangle block 51 near its bottom, and the other end of the lower first connecting rod 52 is hinged to the isosceles triangle block 53 near its bottom. One end of the tension spring 12 is movably connected to the outer wall of the inverter cabinet 1, and the other end of the tension spring 12 is movably connected to the hinge axis between the isosceles triangle block 53 and the upper first connecting rod 52; the second connecting rods 54 are arranged in groups, and the two second connecting rods 54 in the same group are hinged to the second right-angled triangle block 55 and are parallel to each other. The lower second connecting rod 54 and the lower first connecting rod 52 are mirror images of each other with respect to the isosceles triangle block 53, and the upper second connecting rod 54 and the upper first connecting rod 52 are respectively located on both sides of the isosceles triangle block 53.
[0022] The holding mechanism 6 includes a holding component 61 and a fixing component 62. The holding component 61 includes a vertical plate 611 fixed to the inner wall of the inverter cabinet 1, a cross bar 612 that is arranged on the vertical plate 611 and slidably cooperates with the vertical plate 611, a connecting plate 613 fixed to one end of the cross bar 612 close to the first right-angle triangle block 51, a limiting plate 614 fixed to one side of the connecting plate 613 close to the first right-angle triangle block 51, and a fixing plate 615 fixed to one end of the cross bar 612 away from the first right-angle triangle block 51. The end plate 615 and the spring 616 which is sleeved on the cross bar 612 and fixed between the end plate 615 and the vertical plate 611, the limit plate 614 passes through the side wall of the inverter cabinet 1 and slides together, when the connector 57 is plugged into the external connector 41, the bottom surface of the limit plate 614 abuts against the top of the first connecting rod 52 to maintain the electrical connection between the connector 57 and the external connector 41, and the fixing component 62 keeps the connecting plate 613 relatively fixed under the joint action of the tension spring 12 and the spring 616.
[0023] The first right-angled triangle block 51, the isosceles triangle block 53 and the two first connecting rods 52 form a parallelogram structure, and the isosceles triangle block 53, the second right-angled triangle block 55 and the two second connecting rods 54 form a parallelogram structure. Under the cooperation of the tension spring 12 and the spring 616, the bottom surface of the limit plate 614 abuts against the top of the first connecting rod 52 to maintain the electrical connection between the connecting head 57 and the external connector 41, thereby ensuring the stability of the electrical connection between the inverter and the external power supply or external electrical equipment.
[0024] The fixing assembly 62 includes a Z-shaped plate body 621 fixed on the inner top wall of the inverter cabinet 1, an inclined rod 622 fixed to the middle section of the Z-shaped plate body 621 on one side close to the inverter body 2, a hook 623 hinged to the lower end of the inclined rod 622 and buckled to the top of the connecting plate 613 on the side away from the inverter body 2, and a sealing plate 624 fixed to one end of the hook 623 close to the inverter body 2. The Y-shaped mounting frame 33 is located between the Z-shaped plate body 621 and the inner wall of the inverter cabinet 1, and the sealing plate 624 is arranged near the bottom of the Z-shaped plate body 621.
[0025] Under the elastic force of the spring 616, the hook 623 is buckled with the side of the top of the connecting plate 613 away from the inverter body 2. At this time, the bottom of the limiting plate 614 abuts against the top of the first connecting rod 52, thereby ensuring the structural stability of the combined high-voltage inverter.
[0026] To prevent the limit plate 614 from entering the inverter body 2, a limit block 6141 is fixed on the top of the limit plate 614. When the connector 57 is separated from the external connector 41, the side wall of the limit block 6141 close to the inverter body 2 is pressed against the outer wall of the inverter cabinet 1.
[0027] The inverter cabinet 1 is provided with a blocking assembly 7 for blocking the ventilation hole 13 in case of fire. The blocking assembly 7 includes a mounting rod 71 fixed to the top wall of the inverter cabinet 1, a rotating block 72 sleeved on the mounting rod 71 and matched with the mounting rod 71, a Z-shaped rod body 73 fixed to the rotating block 72, a swing rod 74 hinged to the inner wall of the inverter cabinet 1, and a cover plate 75 hinged to the lower end of the swing rod 74. The swing rod 74 is provided with two parallel swing rods, and the lower end of the swing rod 74 is provided with a cover plate 75. The end is hinged to the side wall of the cover plate 75 near the middle thereof; when the connector 57 is plugged into the external connector 41, the upper section of the Z-shaped rod body 73 is close to the side of the first right-angle triangle block 51 and abuts against the side of the connecting plate 613 away from the first right-angle triangle block 51, and the lower end of the Z-shaped rod body 73 is arranged close to the cover plate 75 away from the inverter body 2. When the connector 57 is detached from the external connector 41, the side of the cover plate 75 away from the inverter body 2 is pressed against the inner wall of the inverter cabinet 1.
[0028] When the connector 57 is plugged into the external connector 41, the upper section of the Z-shaped rod 73, which is close to the first right-angled triangle block 51, abuts against the side of the connecting plate 613 which is away from the first right-angled triangle block 51. At this time, a distance is left between the cover plate 75 and the inner wall of the inverter cabinet 1 to allow ventilation when the inverter is in normal use. When the high-pressure inert gas in the high-pressure inert gas tank 31 is transported to the inverter cabinet 1 by the feed pipe 32, the high-pressure inert gas flow impacts the sealing plate 624 and separates the hook 623 from the connecting plate 613. The connecting plate 613 moves toward the side close to the inverter body 2 under the action of the spring 616. During this process, the connecting plate 613 acts on the upper section of the Z-shaped rod body 73 and causes the Z-shaped rod body 73 to rotate around the mounting rod 71. The lower section of the Z-shaped rod body 73 pushes the cover plate 75 until the cover plate 75 completely blocks the ventilation hole 13, cutting off the circulation with the outside air, which is conducive to the inert gas to quickly achieve the purpose of extinguishing the fire; at the same time, the connecting plate 613 drives the limit plate 614 to gradually separate from the first connecting rod 52, so that the middle part of the isosceles triangle block 53 is pulled up by the tension spring 12, and finally causes the connector 57 to separate from the external connector 41, cutting off the electrical connection relationship and improving safety.
[0029] The use principle of a combined high-voltage frequency converter in this embodiment is as follows: the flexible electrical connection component 5 electrically connects the external connector 41 with the internal connector 11 to complete the electrical connection between the frequency converter and the external electrical equipment, and the frequency converter adjusts the high voltage output by the power supply to a low voltage suitable for the electrical equipment. When the frequency converter causes a fire due to overheating, the automatic fire extinguishing component 3 sprays the fire extinguishing fluid into the frequency converter cabinet 1 to extinguish the fire. At the same time, the retaining mechanism 6 loses the limit of the connection of the flexible electrical connection component 5 under the action of the fire extinguishing fluid sprayed by the automatic fire extinguishing component 3, so that the flexible electrical connection component 5 is separated from the external connector 41 under the action of the tension spring 12, and the connection between the frequency converter and the power supply and the electrical equipment is cut off, ensuring safety.
[0030] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.
Claims
1. A combined high-voltage frequency converter, characterized in that: The invention comprises a frequency converter cabinet (1) and a frequency converter body (2) arranged in the frequency converter cabinet (1); an internal connector (11) electrically connected to the frequency converter body (2) is fixed on a side wall of the frequency converter cabinet (1); an automatic fire extinguishing component (3) is arranged on the frequency converter cabinet (1) for spraying a fire extinguishing fluid in the frequency converter cabinet (1) when the temperature in the frequency converter cabinet (1) is too high; a mounting plate (4) is arranged on the outside of the frequency converter cabinet (1); an external connector (41) electrically connected to other electrical equipment is fixed on the mounting plate (4); The inverter cabinet (1) is also provided with a flexible electrical connection component (5) for electrically connecting the external connector (41) to the internal connector (11), a tension spring (12) for connecting to the flexible electrical connection component (5), and a retaining mechanism (6) for limiting the position of the flexible electrical connection component (5). The retaining mechanism (6) loses the limit on the connection of the flexible electrical connection component (5) under the action of the fire extinguishing fluid sprayed by the automatic fire extinguishing component (3), so that the flexible electrical connection component (5) is separated from the external connector (41) under the action of the tension spring (12).
2. A combined high-voltage frequency converter according to claim 1, characterized in that: The automatic fire extinguishing assembly (3) comprises a high-pressure inert gas tank (31) detachably mounted on the top of the frequency converter cabinet (1) and a delivery pipe (32) fixed to and connected with the nozzle of the high-pressure inert gas tank (31); the delivery pipe (32) is arranged vertically, passes through the top of the frequency converter cabinet (1) and cooperates with the frequency converter cabinet (1); a sealing sheet is arranged on the inner wall of the delivery pipe (32) near its lower end; the automatic fire extinguishing assembly (3) further comprises a Y-shaped mounting frame (33) fixed to the outer wall of the delivery pipe (32) near its lower end and a thermosensitive glass tube (34) arranged between the Y-shaped mounting frame (33) and the sealing sheet; the two ends of the thermosensitive glass tube (34) are respectively pressed against the sealing sheet and the Y-shaped mounting frame (33).
3. A combined high-voltage frequency converter according to claim 2, characterized in that: The flexible electrical connection assembly (5) comprises a first right-angled triangle block (51) fixed on the outer wall of the frequency converter cabinet (1), a first connecting rod (52) hinged to a side of the first right-angled triangle block (51) away from the frequency converter cabinet (1), an isosceles triangle block (53) hinged to an end of the first connecting rod (52) away from the first right-angled triangle block (51), a second connecting rod (54) hinged to a side of the isosceles triangle block (53) away from the frequency converter cabinet (1), and a second connecting rod (54) hinged to a side of the second connecting rod (54) away from the frequency converter cabinet (1). 1), a second right-angled triangle block (55) hinged on one side of the inverter cabinet (1), a vertical plate (56) fixed to a side of the second right-angled triangle block (55) away from the inverter cabinet (1) and parallel to the mounting plate (4), a connector (57) penetrating and fixed on the vertical plate (56), and an electric wire (58) connected to the connector (57) and the internal connector (11), wherein one end of the connector (57) away from the inverter cabinet (1) is plugged into and matched with one end of the external connector (41) close to the inverter cabinet (1); The top of the first right-angled triangle block (51) and the top of the second right-angled triangle block (55) are both horizontal planes. The second right-angled triangle block (55) and the first right-angled triangle block (51) are distributed in a mirror image with respect to the isosceles triangle block (53). Two first connecting rods (52) are provided on the same side of the first right-angled triangle block (51) and are parallel to each other. One end of the first connecting rod (52) on the lower side is hinged to a position of the first right-angled triangle block (51) near its bottom, and the other end of the first connecting rod (52) on the lower side is hinged to a position of the isosceles triangle block (53) near its bottom. The tension spring (12) One end of the tension spring (12) is movably connected to the outer wall of the inverter cabinet (1), and the other end of the tension spring (12) is movably connected to the hinge axis between the isosceles triangle block (53) and the upper first connecting rod (52); the second connecting rods (54) are arranged in groups, and the two second connecting rods (54) in the same group are hinged to the second right-angled triangle block (55) and are parallel to each other, the lower second connecting rod (54) and the lower first connecting rod (52) are mirror images of each other with respect to the isosceles triangle block (53), and the upper second connecting rod (54) and the upper first connecting rod (52) are respectively located on both sides of the isosceles triangle block (53).
4. The combined high-voltage frequency converter according to claim 3 is characterized in that: The holding mechanism (6) comprises a holding component (61) and a fixing component (62), wherein the holding component (61) comprises a vertical plate (611) fixed to the inner wall of the frequency converter cabinet (1), a horizontal bar (612) penetrating the vertical plate (611) and slidingly cooperating with the vertical plate (611), a connecting plate (613) fixed to an end of the horizontal bar (612) close to the first right-angled triangle block (51), a limiting plate (614) fixed to a side of the connecting plate (613) close to the first right-angled triangle block (51), and an end plate (615) fixed to an end of the horizontal bar (612) away from the first right-angled triangle block (51). The invention relates to a plate (615) and a spring (616) which is sleeved on the cross bar (612) and fixed between the end plate (615) and the vertical plate (611); the limit plate (614) penetrates the side wall of the inverter cabinet (1) and is slidably matched; when the connector (57) is plugged into the external connector (41), the bottom surface of the limit plate (614) abuts against the top of the first connecting rod (52) to maintain the electrical connection between the connector (57) and the external connector (41); the fixing component (62) keeps the connecting plate (613) relatively fixed under the joint action of the tension spring (12) and the spring (616).
5. A combined high-voltage frequency converter according to claim 4, characterized in that: The fixing assembly (62) comprises a Z-shaped plate (621) fixed on the inner top wall of the frequency converter cabinet (1), an inclined rod (622) fixed to a side of the middle section of the Z-shaped plate (621) close to the frequency converter body (2), a hook (623) hinged to the lower end of the inclined rod (622) and buckled to the top of the connecting plate (613) away from the frequency converter body (2), and a sealing plate (624) fixed to an end of the hook (623) close to the frequency converter body (2), the Y-shaped mounting frame (33) is located between the Z-shaped plate (621) and the inner wall of the frequency converter cabinet (1), and the sealing plate (624) is arranged near the bottom of the Z-shaped plate (621).
6. A combined high-voltage frequency converter according to claim 5, characterized in that: A limiting block (6141) is fixed on the top of the limiting plate (614), and when the connector (57) is separated from the external connector (41), the side wall of the limiting block (6141) close to the inverter body (2) is pressed against the outer wall of the inverter cabinet (1).
7. The combined high-voltage frequency converter according to claim 5 is characterized in that: Ventilation holes (13) are provided on the side walls on both sides of the frequency converter cabinet (1).
8. The combined high-voltage frequency converter according to claim 7 is characterized in that: The frequency converter cabinet (1) is provided with a blocking assembly (7) for blocking the ventilation hole (13) in case of fire, the blocking assembly (7) comprising a mounting rod (71) fixed on the inner top wall of the frequency converter cabinet (1), a rotating block (72) sleeved on the mounting rod (71) and matched with the mounting rod (71), a Z-shaped rod body (73) fixed on the rotating block (72), a swing rod (74) hinged to the inner wall of the frequency converter cabinet (1), and a cover plate (75) hinged to the lower end of the swing rod (74), the swing rod (74) being provided with two and parallel to each other, the lower end of the lower swing rod (74) being hinged to the side wall of the cover plate (75) near the middle thereof; When the connector (57) is plugged into the external connector (41), the upper section of the Z-shaped rod (73) close to the first right-angled triangle block (51) abuts against the side of the connecting plate (613) away from the first right-angled triangle block (51), and the lower end of the Z-shaped rod (73) away from the inverter body (2) is arranged close to the cover plate (75). When the connector (57) is detached from the external connector (41), the side of the cover plate (75) away from the inverter body (2) abuts against the inner wall of the inverter cabinet (1).