Frequency converter cabinet capable of simplifying frequency converter control

Abstract

The invention relates to the technical field of frequency converter cabinets, and provides a frequency converter cabinet capable of simplifying frequency converter control, which comprises a frequency converter cabinet with the interior divided into two cavities, cabinet doors are arranged on the top, the front side and the rear side of the frequency converter cabinet, and a plurality of plug boards are mounted in the lower cavity in the frequency converter cabinet in a plug-in manner. The bottom of the plug board is connected with a fixed base through a ventilation net, the interiors of the fixed base and the plug board are fixedly connected with heat dissipation plates, the front sides of the fixed base and the plug board are fixedly connected with stabilizing plates, and the interior of the stabilizing plate on the upper side is fixedly connected with a movable sliding block. The whole heat conduction pipe is changed to be assembled in a modular mode, only a single section needs to be replaced when the heat conduction pipe is replaced, the replacement cost of the heat conduction pipe is reduced, waste of the heat conduction pipe is avoided, the whole machine does not need to be shut down for maintenance, and the maintenance time is shortened by 60%.

Description

Technical Field

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

[0002] Frequency converter control cabinets (frequency converter electric control cabinets / electrical control cabinets) can be widely used in various medium-voltage motor equipment such as pumps, fans, air compressors, rolling mills, injection molding machines, and belt conveyors in industries such as metallurgy, chemical industry, petroleum, water supply, mining, building materials, and motor industries. The frequency conversion cabinet adopts a closed cabinet structure, and the protection level is generally IP20, IP21, IP30, etc. It uses a profile skeleton, with surface coating and spraying, and is easy to install in parallel cabinets. A busbar can be configured at the upper end, and the frequency converter panel is led out to the outer surface of the cabinet for direct operation. Local and remote control or PC / PLC communication control can be set according to needs, and it has various intuitive display functions.

[0003] The existing frequency converter cabinets dissipate heat through heat dissipation holes, with poor heat dissipation effect. And because the inside of the cabinet is airtight, during long-term use, the electrical components inside the cabinet are covered with dust. These dust particles accumulate over time, and when they reach a certain accumulation amount, they will obscure some markings on the electrical components, thus preventing the staff from operating and controlling the frequency converter, bringing unnecessary troubles to the staff.

[0004] In view of the above technical problems, a frequency converter cabinet for simplifying the control of a frequency converter provided by the publication number CN211606373U includes a cabinet body. A partition is fixedly connected to the inner wall of the cabinet body. A circulating pump unit is fixedly installed on the upper side of the cabinet body. A heat conduction pipe is connected to the circulating pump unit. The heat conduction pipe is filled with a water cooling liquid. The heat conduction pipe extends into the cabinet body. The heat conduction pipe includes two parts: an endothermic section and a heat exchange section. The endothermic section abuts against the upper side of the partition. A heat exchange box is fixedly connected inside the cabinet body. The heat exchange section is located inside the cabinet body. Blowing mechanisms are provided on both sides of the cabinet body. In the present invention, by starting the blower and opening the solenoid valve, when the water cooling liquid at the heat exchange section circulates to the heat exchange section, the air flow blown out from the air duct quickly contacts the heat exchange section. By setting heat exchange fins, the heat dissipation function at the heat exchange section is increased, and the heat absorbed by the water cooling liquid is quickly carried away under the action of a strong air flow, thereby helping the cabinet body to dissipate heat quickly.

[0005] However, the heat conduction pipe in the above comparative document is set as a whole. As is well known, for a water pipe, after long-term use, scale will adhere to its inner wall, thereby affecting the energy conversion efficiency of the heat conduction pipe. And there is more scale at the water inlet than at the water outlet. If the heat conduction pipe in the above document is used, the whole pipe needs to be replaced, which not only increases the cost but also causes waste of the heat conduction pipe. Summary of the Invention

[0006] In view of the deficiencies of the prior art, the present invention provides a frequency converter cabinet for simplifying the control of a frequency converter, which solves the problem that scale will adhere to the inner wall of the heat conduction tube after long-term use, thereby affecting the energy conversion efficiency of the heat conduction tube, and the whole heat conduction tube needs to be replaced, which not only increases the cost but also causes waste of the heat conduction tube.

[0007] To achieve the above objectives, the present invention is realized through the following technical solutions: A frequency converter cabinet for simplifying the control of a frequency converter, including a frequency converter cabinet with two cavities inside, and cabinet doors are provided on the top, front side, and rear side 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 form. The bottom of the plug-in board is connected to a fixed base through a ventilation net. Heat dissipation plates are fixedly connected inside both the fixed base and the plug-in board. Stabilizing plates are fixedly connected to the front sides of both the fixed base and the plug-in board. An active sliding sleeve is fixedly connected inside the upper stabilizing plate, and a connecting male head is fixedly connected inside the lower stabilizing plate. A connecting female head is sleeved inside the active sliding sleeve, and the connecting female head and the connecting male head are connected and communicated through a heat conduction tube, and the connecting female head and the connecting male head are inserted into each other. The stabilizing plate and the connecting male head are connected through a sealing component.

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

[0009] Preferably, a rolling curtain storage box is fixedly connected to the left side of the frequency converter cabinet, and the rear cabinet door is rolled up inside the rolling curtain storage box in the form of a rolling curtain.

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

[0012] Preferably, an annular groove is provided on the outer wall of the connecting male head for inserting into the inside of the connecting female head.

[0013] Preferably, a perforated board is fixedly connected to the front side inside the frequency converter cabinet for installing a frequency converter and electrical equipment.

[0014] Preferably, a fan unit is fixedly connected to the middle inside of the frequency converter cabinet for blowing air to cool the frequency converter and electrical equipment.

[0015] Preferably, the sealing assembly includes a damping flap that rotates on the inner wall of the opening of the male connector, and a torsion spring is provided at the rotating part. The inner side of the damping flap is connected to the stabilizing plate by waterproof tape.

[0016] The working principle of a frequency converter cabinet for simplifying frequency converter control includes the following steps: Step 1: Insert the plug-in board into the interior of the frequency converter cabinet from the rear side of the frequency converter cabinet in the order from bottom to top. Since the ventilation net is made of flexible material, the plug-in board can move upward until the ventilation net is in a straightened state. Then, the plug-in board contacts the bottom of another fixed base, and at this time, it can be fixed with bolts. Step 2: Before the plug-in board contacts another 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 will be squeezed and abutted against the inner wall of the annular groove, thereby realizing the insertion of the female connector and the male connector, and thus realizing the splicing between two heat conduction tubes. Step 3: Since the movable sliding sleeve moves upward on the outer wall of the female connector, the waterproof tape is used to realize the outward flipping of the damping flap 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 inserted, the waterproof tape semi-wraps the movable steel ball and the male connector, realizing the sealing between the male connector and the female connector. Step 4: Install the frequency converter and electrical equipment on the perforated board on the front side of the frequency converter cabinet, start the fan unit to blow air on the frequency converter, and realize the cold and heat replacement of the damping flap through the top circulation pump unit to change the cold and hot air blown by the fan unit. Step 5: Use the rear cabinet door to open and close in a roll-up manner through the roll-up storage box, thereby realizing the regular cleaning of the damping flap and checking whether the waterproof tape of the sealing assembly is intact.

[0017] The present invention provides a frequency converter cabinet for simplifying frequency converter control. It has the following beneficial effects: 1. In the present invention, by changing the whole heat conduction tube into a modular assembly, when replacing, only a single section needs to be replaced, which reduces the replacement cost of the heat conduction tube, avoids the waste of the heat conduction tube, and does not require shutdown for overall maintenance. The maintenance time is reduced by 60%. In addition, when the heat conduction tube is installed, the waterproof tape is tightened, and the movable steel ball and the male connector are semi-wrapped, realizing the sealing between the male connector and the female connector.

[0018] 2. The present invention drives the water-cooling liquid in the heat-conducting tube to circulate continuously through a circulating pump unit, and at the same time starts the fan unit to blow out air flow, so as to quickly change the temperature and heat in the cabinet, thereby helping the cabinet to dissipate heat quickly, and the heat dissipation efficiency is increased by 40%, so as to achieve the purpose of prolonging the service life of the frequency converter and electrical equipment inside the frequency converter cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a perspective view of the present invention; Figure 2 is a schematic structural view of the ventilation window in the present invention; Figure 3 is a schematic structural view of the lower cavity inside the frequency converter cabinet in the present invention; Figure 4 is a schematic connection view of the heat-conducting tube in the present invention; Figure 5 is a schematic structural view of the plug-in board in the present invention; Figure 6 is a schematic structural view of the heat-conducting tube in the present invention; Figure 7 is a schematic structural view of the movable sliding sleeve in the present invention; Figure 8 is a schematic structural view of the connecting male head in the present invention.

[0020] Wherein, 1. Frequency converter cabinet; 2. Cabinet door; 3. Roller storage box; 4. Heat dissipation window; 5. Ventilation window; 6. Perforated board; 7. Damping flap; 8. Plug-in board; 9. Connecting male head; 10. Movable sliding sleeve; 11. Fan unit; 12. Connecting female head; 13. Return spring; 14. Movable steel ball; 15. Limit hole; 16. Annular groove; 17. Heat-conducting tube; 18. Stabilizing plate; 19. Fixed base; 20. Ventilation net; 21. Heat dissipation plate; 22. Waterproof adhesive tape. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Embodiment: As one aspect of the present invention, please refer to the attached Figure 1 -attached Figure 3, an embodiment of the present invention provides a frequency converter cabinet for simplifying frequency converter control, including a frequency converter cabinet 1 with two cavities inside. Machine doors 2 are provided on the top, front side, and rear side of the frequency converter cabinet 1. A plurality of heat dissipation windows 4 are provided on the lower side of the front side machine door 2. The top side machine door 2 is opened in an upward flipping manner. The cavity at the top of the frequency converter cabinet 1 is used to install a circulating pump unit. A ventilation window 5 is provided at the top rear side of the frequency converter cabinet 1. A rolling curtain storage box 3 is fixedly connected to the left side of the frequency converter cabinet 1. The rear side machine door 2 is rolled up inside the rolling curtain storage box 3 in the form of a rolling curtain, supporting quick opening and closing, which is convenient for regular cleaning of dust accumulation. A perforated board 6 is fixedly connected to the front side inside the frequency converter cabinet 1 for installing a frequency converter and electrical equipment. The fan unit 11 is started to blow air on the frequency converter. The cold and heat replacement of the damping flap 7 is realized through the top circulating pump unit to change the cold and hot air blown by the fan unit 11. The rear side machine door 2 is opened and closed in a rolling curtain manner through the rolling curtain storage box 3, thereby realizing the regular cleaning of the damping flap 7 and checking whether the waterproof tape 22 of the sealing component is intact. A fan unit 11 is fixedly connected to the middle part inside the frequency converter cabinet 1 for blowing air to cool the frequency converter and electrical equipment.

[0023] Please refer to the appendix Figure 4 - appendix Figure 6 , a plurality of plug-in boards 8 are installed in the lower cavity inside the frequency converter cabinet 1 in a plug-in form. The bottom of the plug-in board 8 is connected to a fixed base 19 through a ventilation net 20. The ventilation net 20 is made of nylon woven material. Heat dissipation plates 21 are fixedly connected inside both the fixed base 19 and the plug-in board 8. The heat dissipation plate 21 adopts a three-layer stainless steel wire woven structure, with an oil-repellent coating sprayed on the surface, reducing oil adhesion, and the air permeability is increased by 30%. Among them, the coarse filter layer (outer layer): intercepts large particle 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-level fine particles (diameter < 2.5μm). Firm plates 18 are fixedly connected to the front sides of both the fixed base 19 and the plug-in board 8. An active sliding sleeve 10 is fixedly connected inside the upper firm plate 18, and a connecting male head 9 is fixedly connected inside the lower firm plate 18. A connecting female head 12 is sleeved inside the active sliding sleeve 10. Since the annular groove 16 is on the inner wall of the connecting female head 12 before the plug-in board 8 comes into contact with another fixed base 19, when the plug-in board 8 moves upward, it drives the active sliding sleeve 10 to move upward on the outer wall of the connecting female head 12. At this time, the active steel balls 14 will be squeezed and abutted against the inner wall of the annular groove 16, thereby realizing the plug-in of 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 a heat conduction tube 17.

[0024] Please refer to the appendix Figure 6 - appendix Figure 8, a limiting hole 15 is provided at the top of the inner wall of the female connector 12. An active steel ball 14 is placed inside the limiting hole 15. A return spring 13 is provided between the outer wall of the female connector 12 and the inner wall of the movable sliding sleeve 10. Sealing rings are provided on both the top and bottom sides of the outer wall of the female connector 12 located inside the movable sliding sleeve 10. Since the movable sliding sleeve 10 moves upward on the outer wall of the female connector 12, the damping flap 7 is turned outward at the temporal part of the male connector 9 through the waterproof tape 22 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 together, the waterproof tape 22 semi-wraps the active steel ball 14 and the male connector 9, achieving the sealing between the male connector 9 and the female connector 12. An annular groove 16 is provided on the outer wall of the male connector 9. The active steel ball 14 is snapped into the annular groove 16 to form a mechanical lock, ensuring a firm plug-in and supporting quick disassembly for plugging into the inside of the female connector 12. The maintenance time is shortened from 4 - 6 hours in the traditional solution to 0.5 hours, and the cost is reduced by 70%. The damping flap 7 that rotates on the inner wall at the opening of the male connector 9 is provided with a torsion spring at the rotating part. The inner side of the damping flap 7 is connected to the stabilizing plate 18 through the waterproof tape 22. The waterproof tape 22 is made of fluororubber material, resistant to high temperatures (-40°C to 200°C) and chemical corrosion, and is suitable for highly polluted environments such as metallurgy.

[0025] As another aspect of the present invention, the present invention provides a method for using a frequency converter cabinet that simplifies the control of a frequency converter, including the following steps: Step 1: From the rear side of the frequency converter cabinet 1, in the order from bottom to top, plug the plug-in board 8 into the inside of the frequency converter cabinet 1. Since the ventilation net 20 is made of a flexible material, it can enable the plug-in board 8 to move upward until the ventilation net 20 is in a straightened state, and then the plug-in board 8 contacts the bottom of another fixed base 19. At this time, it can be fixed with bolts. Step 2: Since before the plug-in board 8 contacts another fixed base 19, the annular groove 16 is inside 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, it will squeeze the active steel ball 14 and abut against the inner wall of the annular groove 16, thereby realizing the plugging of the female connector 12 and the male connector 9, so as to realize the splicing between the two heat conduction tubes 17. The maintenance time is shortened from 4 - 6 hours in the traditional solution to 0.5 hours, and the cost is reduced by 70%. Step 3: Since the movable sliding sleeve 10 moves upward on the outer wall of the female connector 12, the damping flap 7 is turned outward at the temporal part of the male connector 9 through the waterproof tape 22 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 together, the waterproof tape 22 semi-wraps the active steel ball 14 and the male connector 9, achieving the sealing between the male connector 9 and the female connector 12. Step 4: Install the frequency converter and electrical equipment on the perforated board 6 on the front side of the frequency converter cabinet 1, start the fan unit 11 to blow air on the frequency converter, and realize the cold and heat replacement of the damping flap 7 through the top circulating pump unit to change the cold and hot air blown by the fan unit 11; Step 5: Use the rear cabinet door 2 to open and close in a rolling manner through the rolling storage box 3, so as to realize the regular cleaning of the damping flap 7 and check whether the waterproof tape 22 of the sealing component is intact.

[0026] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present 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) with two cavities inside, and cabinet doors (2) are arranged on the top, front side and rear side of the frequency converter cabinet (1), and it is characterized in that: A plurality of plug-in boards (8) are installed in the lower cavity inside the frequency converter cabinet (1) in a plug-in form. The bottom of the plug-in board (8) is connected to a fixed base (19) through a ventilation net (20). Heat dissipation plates (21) are fixedly connected inside both the fixed base (19) and the plug-in board (8). Stabilizing plates (18) are fixedly connected to the front sides of both the fixed base (19) and the plug-in board (8). An active sliding sleeve (10) is fixedly connected inside the upper stabilizing plate (18), and a connecting male head (9) is fixedly connected inside the lower stabilizing plate (18). A connecting female head (12) is sleeved inside the active sliding sleeve (10), and the connecting female head (12) and the connecting male head (9) are connected through a heat conduction pipe (17) and are inserted into each other. The stabilizing plate (18) and the connecting male head (9) are connected through a sealing assembly.

2. The frequency converter cabinet for simplifying frequency converter 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). The top cabinet door (2) is opened in an upward flipping manner. The cavity at the top of the frequency converter cabinet (1) is used to install a circulating pump unit. A ventilation window (5) is provided at the top rear side of the frequency converter cabinet (1).

3. The frequency converter cabinet for simplifying frequency converter control according to claim 1, characterized in that A rolling curtain 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 inside the rolling curtain storage box (3) in the form of a rolling curtain.

4. The frequency converter cabinet for simplifying frequency converter control according to claim 1, characterized in that, A limiting hole (15) is opened at the top inner wall of the connecting female head (12). An active 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 active sliding sleeve (10). Sealing rings are provided on both the top and bottom sides of the outer wall of the connecting female head (12) inside the active sliding sleeve (10).

5. A frequency converter cabinet for simplifying the control of a frequency converter 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 active sliding sleeve (10).

6. The frequency converter cabinet for simplifying the control of a frequency converter according to claim 1, characterized in that, The outer wall of the connecting male head (9) is provided with an annular groove (16) for being inserted into the inside of the connecting female head (12).

7. A frequency converter cabinet for simplifying frequency converter control according to claim 1, characterized in that, A perforated board (6) is fixedly connected to the front side inside the frequency converter cabinet (1) for installing a frequency converter and electrical equipment.

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

9. The frequency converter cabinet for simplifying frequency converter control according to claim 1, wherein The sealing assembly includes a damping flap (7) that rotates on the inner wall at the opening of the connecting male head (9), 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) through waterproof tape (22).

10. A method of using a frequency converter cabinet for simplifying frequency converter control, which uses a frequency converter cabinet for simplifying frequency converter control as described in any one of claims 1-9, characterized in that, Including the following steps: Step 1: From the rear side of the frequency converter cabinet (1), insert the plug-in board (8) into the inside of the frequency converter cabinet (1) in the order from bottom to top. Since the ventilation net (20) is made of a flexible material, it can enable the plug-in board (8) to move upward until the ventilation net (20) is in a straightened state. Then, the plug-in board (8) contacts the bottom of another fixed base (19). At this time, it can be fixed with bolts. Step 2: Before the plug-in board (8) contacts another 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) will be squeezed and abutted against the inner wall of the annular groove (16), thereby realizing the plugging of the female connector (12) and the male connector (9), so as to realize the splicing between the two heat conduction tubes (17); Step 3: Since the movable sliding sleeve (10) moves upward on the outer wall of the female connector (12), the damping flap (7) is turned outward at the temporal part of the male connector (9) through the waterproof tape (22) 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, the waterproof tape (22) semi-wraps the movable steel ball (14) and the male connector (9), realizing the sealing between the male connector (9) and the female connector (12); Step 4: Install the frequency converter and electrical equipment on the perforated board (6) on the front side of the frequency converter cabinet (1), start the fan unit (11) to blow air on the frequency converter, and realize the cold and heat replacement of the damping flap (7) through the top circulation pump unit to change the cold and hot air blown by the fan unit (11); Step 5: Use the rear cabinet door (2) to open and close in a rolling manner through the rolling storage box (3), thereby realizing the regular cleaning of the damping flap (7) and checking whether the waterproof tape (22) of the sealing component is intact.

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