A frequency converter cabinet for simplifying frequency converter control

Abstract

The present invention relates to the technical field of frequency converter cabinets, and provides a frequency converter cabinet for simplifying frequency converter control, including a frequency converter cabinet whose interior is divided into two cavities, and cabinet doors are provided on the top, front, and rear sides of the frequency converter cabinet. A plurality of plug-in boards are installed in the lower cavity inside the frequency converter cabinet in a plug-in manner, the bottom of the plug-in board is connected to a fixed base through a ventilation net, the fixed base and the interior of the plug-in board are fixedly connected to a heat sink, the fixed base and the front side of the plug-in board are fixedly connected to a stabilizing plate, and the interior of the upper stabilizing plate is fixedly connected to a movable slide. By changing the entire heat pipe into a modular assembly, only a single section needs to be replaced during replacement, thereby reducing the replacement cost of the heat pipe and avoiding waste of the heat pipe. There is no need to shut down the entire machine for maintenance, and maintenance time is reduced by 60%.

Description

Technical Field

[0001] The present invention relates to the technical field of frequency converter cabinets, and in particular to a frequency converter cabinet for simplifying frequency converter control. Background Art

[0002] Frequency converter control cabinets (frequency converter electrical control cabinets / electrical control cabinets) are widely used in the metallurgical, chemical, petroleum, water supply, mining, building materials, and motor industries for various medium-voltage motor equipment, including pumps, fans, air compressors, rolling mills, injection molding machines, and belt conveyors. Frequency converter cabinets utilize a closed cabinet structure with protection levels generally rated IP20, IP21, and IP30. They utilize a profile frame with a plastic-sprayed surface, making them easy to install alongside other cabinets. Busbars can be configured at the top, and the frequency converter panel is externally connected to the cabinet for direct operation. Local and remote control, as well as PC / PLC communication control, can be configured as needed, and they feature a variety of intuitive display functions.

[0003] The existing inverter cabinet dissipates heat through heat dissipation holes, which has poor heat dissipation effect. In addition, because the cabinet is airtight, the electrical components in the cabinet are covered with dust during long-term use. These dust particles accumulate over time. When a certain amount is reached, they will cover some of the markings on the electrical components, thereby hindering the staff from operating and controlling the inverter, causing unnecessary trouble to the staff.

[0004] In response to the above-mentioned technical problems, announcement number CN211606373U provides a frequency converter cabinet with simplified frequency converter control, comprising a cabinet, a partition fixedly connected to the inner wall of the cabinet, a circulating pump unit fixedly installed on the upper side of the cabinet, a heat pipe connected to the circulating pump unit, the heat pipe filled with water-cooling liquid, the heat pipe extending into the cabinet, the heat pipe comprising a heat absorbing section and a heat exchanging section, the heat absorbing section abutting the upper side of the partition, a heat exchange box fixedly connected to the cabinet, the heat exchanging section being located in the cabinet, and a blower mechanism provided on both sides of the cabinet. The utility model starts the blower and opens the solenoid valve. When the water-cooling liquid at the heat exchanging section circulates to the heat exchanging section, the air flow blown out of the air duct quickly contacts the heat exchanging section. The heat dissipation function of the heat exchanging section is enhanced by providing heat exchanging fins. The strong airflow quickly removes the heat absorbed by the water-cooling liquid, thereby helping the cabinet to quickly dissipate heat.

[0005] However, the heat pipe in the above-mentioned comparative document is set as a whole pipe. As we all know, after long-term use, scale will adhere to the inner wall of a water-carrying pipe, which will affect the energy conversion efficiency of the heat pipe. In addition, there is more scale at the water inlet than at the water outlet. If the heat pipe in the above-mentioned document is used, the whole pipe needs to be replaced, which not only increases the cost but also wastes the heat pipe. Summary of the Invention

[0006] In response to the shortcomings of the existing technology, the present invention provides an inverter cabinet with simplified inverter control, which solves the problem that due to long-term use of heat pipes, scale will adhere to the inner wall of the heat pipes, thereby affecting the energy conversion efficiency of the heat pipes and requiring the entire pipes to be replaced, which not only increases the cost but also leads to waste of heat pipes.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a frequency converter cabinet for simplifying frequency converter control, comprising a frequency converter cabinet whose interior is divided into two cavities, and cabinet doors are provided on the top, front and rear sides of the frequency converter cabinet, and a plurality of plug-in boards are installed in the lower cavity inside the frequency converter cabinet in a plug-in manner, the bottom of the plug-in board is connected to a fixed base through a ventilation net, the fixed base and the interior of the plug-in board are fixedly connected to a heat dissipation plate, the fixed base and the front side of the plug-in board are fixedly connected to a stabilizing plate, the interior of the upper stabilizing plate is fixedly connected to a movable sliding sleeve, the interior of the lower stabilizing plate is fixedly connected to a connecting male head, the interior of the movable sliding sleeve is provided with a connecting female head, and the connecting female head and the connecting male head are connected by a heat pipe, and the connecting female head and the connecting male head are plugged into each other, and the stabilizing plate and the connecting male head are connected by a sealing assembly.

[0008] Preferably, a plurality of heat dissipation windows are provided on the lower side of the front cabinet door, the cabinet door on the top side is opened by flipping upward, the cavity on the top of the inverter cabinet is used to install the circulating pump unit, and a ventilation window is provided on the top of the rear side of the inverter cabinet.

[0009] Preferably, a roller shutter storage box is fixedly connected to the left side of the inverter cabinet, and the cabinet door on the rear side is rolled up inside the roller shutter storage box in the form of a roller shutter.

[0010] Preferably, a limiting hole is opened on the top of the inner wall of the connecting female head, a movable steel ball is placed inside the limiting hole, a reset spring is arranged between the outer wall of the connecting female head and the inner wall of the movable sliding sleeve, and sealing rings are arranged on both the top and bottom sides of the outer wall of the connecting female head located inside the movable sliding sleeve.

[0011] Preferably, one end of the reset spring is connected to the outer wall of the connecting female head, and the other end of the reset spring is connected to the inner wall of the movable sliding sleeve.

[0012] Preferably, an annular groove is provided on the outer wall of the male connector for being plugged into the interior of the female connector.

[0013] Preferably, a perforated plate is fixedly connected to the inner front side of the inverter cabinet for installing the inverter and electrical equipment.

[0014] Preferably, a fan unit is fixedly connected to the middle of the inner side of the inverter cabinet to blow air to cool the inverter and electrical equipment.

[0015] Preferably, the sealing assembly includes a damping flap located on the inner wall of the connecting male head opening and rotating, and a torsion spring is provided at the rotating position, and the inner side of the damping flap is connected to the stabilizing plate through a waterproof tape.

[0016] A working principle of a frequency converter cabinet for simplifying frequency converter control includes the following steps:

[0017] Step 1: From the rear side of the inverter cabinet, insert the plug-in board into the interior of the inverter cabinet from the bottom up. Since the ventilation net is made of flexible material, the plug-in board can be moved upward until the ventilation net is in a straight state and the plug-in board contacts the bottom of the other fixed base. At this time, it can be fixed with bolts;

[0018] Step 2: Before the plug-in board contacts the other fixed base, the annular groove is located on the inner wall of the female connector. At this time, when the plug-in board moves upward, it drives the movable sliding sleeve to move upward on the outer wall of the female connector. At this time, the movable steel ball is squeezed and abuts against the inner wall of the annular groove, thereby achieving the connection between the female connector and the male connector, and thus achieving the splicing between the two heat pipes;

[0019] Step 3: As the movable sliding sleeve moves upward on the outer wall of the female connector, the waterproof tape is used to realize the damping flap to flip outward at the temporal part of the male connector until it is flush with the joint of the male connector. Therefore, after the male connector and the female connector are plugged in, the waterproof tape is half-wrapped around the movable steel ball and the male connector, thereby realizing a seal between the male connector and the female connector.

[0020] Step 4: Install the inverter and electrical equipment on the perforated plate in front of the inverter cabinet, start the fan unit to blow air to the inverter, and use the top circulation pump unit to achieve hot and cold air switching of the damping flap to change the hot and cold air blown by the fan unit;

[0021] Step 5. Use the rear cabinet door to open and close the roller shutter storage box to regularly clean the damping flap and check whether the waterproof tape of the sealing component is intact.

[0022] The present invention provides a frequency converter cabinet that simplifies frequency converter control and has the following beneficial effects:

[0023] 1. The present invention adopts a modular assembly method, which changes the entire heat pipe into a modular one. When replacing a heat pipe, only a single section needs to be replaced, thus reducing the replacement cost of the heat pipe and avoiding waste of the heat pipe. It also eliminates the need to shut down the entire machine for maintenance, reducing maintenance time by 60%. In addition, while the heat pipe is being installed, the waterproof tape is tightened, and the movable steel ball and the male connector are partially wrapped, thereby achieving a seal between the male connector and the female connector.

[0024] 2. The present invention uses a circulating pump unit to drive the water-cooling liquid in the heat pipe to circulate continuously, and at the same time starts the fan unit to blow out air flow, thereby quickly changing the temperature and heat inside the cabinet, thereby helping the cabinet to quickly dissipate heat, and the heat dissipation efficiency is improved by 40%, so as to achieve the purpose of extending the service life of the inverter and electrical equipment inside the inverter cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A perspective view of the present invention;

[0026] Figure 2 This is a schematic structural diagram of the ventilation window of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the lower cavity inside the inverter cabinet of the present invention;

[0028] Figure 4 Schematic diagram of the connection of the heat pipe in the present invention;

[0029] Figure 5 It is a structural diagram of the plug board in the present invention;

[0030] Figure 6 Schematic diagram of the structure of the heat pipe in the present invention;

[0031] Figure 7 Schematic diagram of the structure of the movable sleeve in the present invention;

[0032] Figure 8 It is a structural schematic diagram of the connecting male connector in the present invention.

[0033] Among them, 1. Inverter cabinet; 2. Cabinet door; 3. Roller shutter storage box; 4. Heat dissipation window; 5. Ventilation window; 6. Perforated board; 7. Damping flap; 8. Plug board; 9. Male connector; 10. Movable sleeve; 11. Fan unit; 12. Female connector; 13. Reset spring; 14. Movable steel ball; 15. Limiting hole; 16. Annular groove; 17. Heat pipe; 18. Stabilizing plate; 19. Fixed base; 20. Ventilation net; 21. Heat dissipation plate; 22. Waterproof tape. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] Example:

[0036] As one aspect of the present invention, please refer to the attached Figure 1 - Attachment Figure 3 The embodiment of the present invention provides a frequency converter cabinet for simplifying frequency converter control, including a frequency converter cabinet 1 with an interior divided into two cavities, and cabinet doors 2 are provided on the top, front and rear sides of the frequency converter cabinet 1, a plurality of heat dissipation windows 4 are provided on the lower side of the front cabinet door 2, and the top cabinet door 2 is opened in an upward flip-up manner, the cavity on the top of the frequency converter cabinet 1 is used to install a circulating pump unit, a ventilation window 5 is provided on the top of the rear side of the frequency converter cabinet 1, a rolling shutter storage box 3 is fixedly connected to the left side of the frequency converter cabinet 1, and the rear cabinet door 2 is rolled up in the inside of the rolling shutter storage box 3 in the form of a rolling shutter, supporting fast Opening and closing is convenient for regular cleaning of dust accumulation. The front side of the interior of the inverter cabinet 1 is fixedly connected with a perforated plate 6 for installing the inverter and electrical equipment. Start the fan unit 11 to blow air to the inverter. The hot and cold replacement of the damping flap 7 is achieved through the top circulation pump unit to change the hot and cold air blown out by the fan unit 11. The rear cabinet door 2 is opened and closed by the roller shutter storage box 3 to achieve regular cleaning of the damping flap 7 and check whether the sealing component waterproof tape 22 is intact. The fan unit 11 is fixedly connected to the middle part of the inner side of the inverter cabinet 1 for blowing air to cool the inverter and electrical equipment.

[0037] Please see the attached Figure 4 - Attachment Figure 6 , multiple plug-in boards 8 are installed in the lower cavity inside the inverter cabinet 1 in the form of plug-in. The bottom of the plug-in board 8 is connected to the fixed base 19 through the ventilation net 20. The ventilation net 20 is made of nylon braided material. The fixed base 19 and the inside of the plug-in board 8 are fixedly connected with a heat sink 21. The heat sink 21 adopts a three-layer stainless steel wire braided structure and is sprayed with an oleophobic coating on the surface to reduce oil adhesion and increase the air permeability by 30%. The coarse filter layer (outer layer): intercepts large particles of dust (diameter>1mm); the medium-efficiency layer (middle layer): electrostatically adsorbs fine particles (diameter 0.1~1mm); the fine filter layer (inner layer): ultra-fine fiber membrane filters PM2.5 particles (diameter <2.5μm), the fixed base 1 9 and the front side of the plug-in board 8 are fixedly connected with a stabilizing plate 18, the interior of the upper stabilizing plate 18 is fixedly connected with a movable sleeve 10, the interior of the lower stabilizing plate 18 is fixedly connected with a connecting male head 9, and the interior of the movable sleeve 10 is provided with a connecting female head 12. Before the plug-in board 8 contacts the other fixed base 19, the annular groove 16 is on the inner wall of the connecting female head 12. At this time, when the plug-in board 8 moves upward, it drives the movable sleeve 10 to move upward on the outer wall of the connecting female head 12. At this time, the movable steel ball 14 will be squeezed and abut against the inner wall of the annular groove 16, thereby realizing the connection between the connecting female head 12 and the connecting male head 9, and the connecting female head 12 and the connecting male head 9 are connected through the heat pipe 17.

[0038] Please see the attached Figure 6 - Attachment Figure 8 , a limiting hole 15 is provided on the top of the inner wall of the connecting female head 12, and a movable steel ball 14 is placed inside the limiting hole 15, and a return spring 13 is provided between the outer wall of the connecting female head 12 and the inner wall of the movable sliding sleeve 10, and the outer wall of the connecting female head 12 is located inside the movable sliding sleeve 10. Sealing rings are provided on both the top and bottom sides. Since the movable sliding sleeve 10 moves upward on the outer wall of the connecting female head 12, the damping flap 7 is flipped outward at the temporal part of the connecting male head 9 through the waterproof tape 22 until it is flush with the joint of the connecting male head 9. Therefore, after the connecting male head 9 and the connecting female head 12 are plugged in, the waterproof tape 22 is half-wrapped on the movable steel ball 14 and the connecting male head 9, and the connecting male head is connected. The seal between the head 9 and the connecting female head 12, the outer wall of the connecting male head 9 is provided with an annular groove 16, and the movable steel ball 14 is clamped into the annular groove 16 to form a mechanical lock, ensuring a stable plug-in and supporting quick disassembly, so as to be plugged into the interior of the connecting female head 12. The maintenance time is shortened from 4 to 6 hours of the traditional solution to 0.5 hours, and the cost is reduced by 70%. The damping flap 7 is connected to the inner wall of the opening of the connecting male head 9 and rotates, and a torsion spring is provided at the rotating part. The inner side of the damping flap 7 is connected to the stabilizing plate 18 by a waterproof tape 22, wherein the waterproof tape 22 is made of fluororubber, which is resistant to high temperature (-40℃~200℃) and chemical corrosion, and is suitable for highly polluted environments such as metallurgy.

[0039] As another aspect of the present invention, the present invention provides a method for using a frequency converter cabinet that simplifies frequency converter control, comprising the following steps:

[0040] Step 1: From the rear side of the inverter cabinet 1, insert the plug-in board 8 into the interior of the inverter cabinet 1 from the bottom up. Since the ventilation net 20 is made of flexible material, the plug-in board 8 can be moved upward until the ventilation net 20 is in a straight state and the plug-in board 8 contacts the bottom of the other fixed base 19. At this time, it can be fixed with bolts;

[0041] Step 2: Before the plug-in board 8 contacts the other fixed base 19, the annular groove 16 is located on the inner wall of the female connector 12. At this time, when the plug-in board 8 moves upward, it drives the movable sliding sleeve 10 to move upward on the outer wall of the female connector 12. At this time, the movable steel ball 14 is squeezed and abuts against the inner wall of the annular groove 16, thereby achieving the connection between the female connector 12 and the male connector 9, and thus achieving the splicing between the two heat pipes 17. The maintenance time is shortened from 4 to 6 hours in the traditional solution to 0.5 hours, reducing the cost by 70%;

[0042] Step 3: As the movable sliding sleeve 10 moves upward on the outer wall of the female connector 12, the waterproof adhesive tape 22 is used to realize the damping flap 7 to flip outward at the temporal portion of the male connector 9 until it is flush with the joint of the male connector 9. Therefore, after the male connector 9 and the female connector 12 are plugged in, the waterproof adhesive tape 22 is half-wrapped around the movable steel ball 14 and the male connector 9, thereby achieving a seal between the male connector 9 and the female connector 12.

[0043] Step 4: Install the inverter and electrical equipment on the perforated plate 6 on the front side of the inverter cabinet 1, start the fan unit 11 to blow air to the inverter, and use the top circulation pump unit to achieve hot and cold air switching of the damping flap 7 to change the hot and cold air blown by the fan unit 11;

[0044] Step 5: Use the rear cabinet door 2 to open and close the roller shutter storage box 3 in a rolling curtain manner, thereby regularly cleaning the damping flap 7 and checking whether the waterproof tape 22 of the sealing component is intact.

[0045] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A frequency converter cabinet for simplifying frequency converter control, comprising a frequency converter cabinet (1) having an interior divided into two cavities, and having cabinet doors (2) provided on the top, front side and rear side of the frequency converter cabinet (1), characterized in that: A plurality of plug-in boards (8) are installed in a plug-in manner in a cavity at the lower side of the inverter cabinet (1). The bottom of the plug-in board (8) is connected to a fixed base (19) through a ventilation net (20). The fixed base (19) and the inside of the plug-in board (8) are fixedly connected to a heat dissipation plate (21). The fixed base (19) and the front side of the plug-in board (8) are fixedly connected to a stabilizing plate (18). The inside of the upper stabilizing plate (18) is fixedly connected to a movable sliding sleeve (10). The inside of the lower stabilizing plate (18) is fixedly connected to a connecting male head (9). The inside of the movable sliding sleeve (10) is provided with a connecting female head (12), and the connecting female head ( 12) is connected to the connecting male head (9) through a heat conducting pipe (17), and the connecting female head (12) and the connecting male head (9) are plugged into each other, and the stabilizing plate (18) and the connecting male head (9) are connected through a sealing component; the stabilizing plate (18), the connecting male head (9), the connecting female head (12), and the heat conducting pipe (17) are all multiple, and when installed, the plug-in plate (8) is used to contact and fix the bottom of the fixed base (19) of another plug-in plate (8), thereby realizing the plug-in of the connecting female head (12) and the connecting male head (9) of another plug-in plate (8), so as to realize the splicing between the two heat conducting pipes (17), thereby changing the entire heat conducting pipe into a modular assembly.

2. The inverter cabinet for simplifying inverter control according to claim 1, characterized in that: A plurality of heat dissipation windows (4) are provided on the lower side of the front cabinet door (2), and the top cabinet door (2) is opened in an upward flip-up manner. The cavity on the top of the inverter cabinet (1) is used to install a circulating pump unit, and a ventilation window (5) is provided on the top of the rear side of the inverter cabinet (1).

3. The inverter cabinet for simplifying inverter control according to claim 2, characterized in that: A rolling curtain storage box (3) is fixedly connected to the left side of the frequency converter cabinet (1), and the cabinet door (2) on the rear side is rolled up inside the rolling curtain storage box (3) in the form of a rolling curtain.

4. The inverter cabinet for simplifying inverter control according to claim 3, characterized in that: A limiting hole (15) is provided on the top of the inner wall of the connecting female head (12), a movable steel ball (14) is placed inside the limiting hole (15), a return spring (13) is provided between the outer wall of the connecting female head (12) and the inner wall of the movable sliding sleeve (10), and sealing rings are provided on both the top and bottom sides of the outer wall of the connecting female head (12) located inside the movable sliding sleeve (10).

5. The inverter cabinet for simplifying inverter control according to claim 4, characterized in that: One end of the return spring (13) is connected to the outer wall of the connecting female head (12), and the other end of the return spring (13) is connected to the inner wall of the movable sliding sleeve (10).

6. The inverter cabinet for simplifying inverter control according to claim 5, characterized in that: An annular groove (16) is provided on the outer wall of the male connector (9) for being inserted into the interior of the female connector (12).

7. The inverter cabinet for simplifying inverter control according to claim 6, characterized in that: A perforated plate (6) is fixedly connected to the front inner side of the frequency converter cabinet (1) for installing the frequency converter and electrical equipment.

8. The inverter cabinet for simplifying inverter control according to claim 7, characterized in that: A fan unit (11) is fixedly connected to the middle of the inner side of the frequency converter cabinet (1) for blowing air to cool the frequency converter and electrical equipment.

9. The inverter cabinet for simplifying inverter control according to claim 8, characterized in that: The sealing assembly includes a damping flap (7) located on the inner wall of the opening of the connecting male head (9) and rotating, and a torsion spring is provided at the rotating position. The inner side of the damping flap (7) is connected to the stabilizing plate (18) through a waterproof tape (22).

10. A method for using a frequency converter cabinet with simplified frequency converter control, using the frequency converter cabinet with simplified frequency converter control according to claim 9, characterized in that: The following steps are involved: Step 1: From the rear side of the inverter cabinet (1), insert the plug-in board (8) into the interior of the inverter cabinet (1) in the order from bottom to top. Since the ventilation net (20) is made of flexible material, the plug-in board (8) can be moved upward until the ventilation net (20) is in a stretched state and the plug-in board (8) contacts the bottom of another fixed base (19). At this time, it can be fixed by bolts; Step 2: Before the plug-in board (8) comes into contact with the other fixed base (19), the annular groove (16) is located on the inner wall of the connecting female head (12). At this time, when the plug-in board (8) moves upward, it drives the movable sliding sleeve (10) to move upward on the outer wall of the connecting female head (12). At this time, the movable steel ball (14) is squeezed and abuts against the inner wall of the annular groove (16), thereby realizing the connection between the connecting female head (12) and the connecting male head (9), and thus realizing the splicing between the two heat pipes (17); Step 3: As the movable sliding sleeve (10) moves upward on the outer wall of the connecting female head (12), the damping flap (7) is turned outward on the temporal part of the connecting male head (9) by the waterproof adhesive tape (22) until it is flush with the joint of the connecting male head (9). Therefore, after the connecting male head (9) and the connecting female head (12) are plugged in, the waterproof adhesive tape (22) is half-wrapped around the movable steel ball (14) and the connecting male head (9), thereby achieving sealing between the connecting male head (9) and the connecting female head (12); Step 4: Install the inverter and electrical equipment on the perforated plate (6) on the front side of the inverter cabinet (1), start the fan unit (11) to blow air to the inverter, and use the top circulation pump unit to achieve hot and cold replacement of the damping flap (7) to change the hot and cold air blown out by the fan unit (11); Step 5: Use the rear cabinet door (2) to open and close the roller shutter storage box (3) in a roller shutter manner, thereby achieving regular cleaning of the damping flap (7) and checking whether the waterproof tape (22) of the sealing component is intact.

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