Frequency conversion power distribution cabinet for mine

Abstract

The utility model relates to the technical field of variable-frequency power distribution cabinets, in particular to a variable-frequency power distribution cabinet for a mine. According to the technical scheme, the variable-frequency power distribution cabinet comprises a variable-frequency power distribution cabinet body, a first threaded rod, a cable, a bolt, a rotating rod and a second threaded rod, a base is fixed to the variable-frequency power distribution cabinet body, a disc is installed in the base, a semicircular frame is installed in the disc, a rubber pad is fixed in the semicircular frame, and the top end of the cable extends into the variable-frequency power distribution cabinet body to be connected. A cable is clamped and limited by the rubber pad, damping devices are installed at the front end and the rear end of the base correspondingly, first supports are fixed to the damping devices, the front end and the rear end of the inner wall of the first groove are rotationally connected with rotating shafts correspondingly, winding rollers are fixed to the rear ends of the rotating shafts, and the cable is wound on the winding rollers. The variable-frequency power distribution cabinet has the advantages that the cable can be damped, one section of the cable can be kept loose, and the connection position of the cable and the variable-frequency power distribution cabinet body is prevented from being pulled and loosened due to tight cable laying and cable vibration.

Description

Technical Field

[0001] This utility model relates to the field of frequency conversion distribution cabinet technology, specifically a frequency conversion distribution cabinet for mining. Background Technology

[0002] A variable frequency drive (VFD) distribution cabinet for mining is a power control device specifically designed for harsh mining conditions. It integrates variable frequency drive, power distribution, and intelligent protection functions, primarily used to control the motor speed and operating status of mining machinery. Its core utilizes VFD technology, adjusting the frequency and voltage of the output power supply to achieve soft starting, stepless speed regulation, and energy-saving operation of the motor.

[0003] In mining environments, cable vibration in variable frequency distribution cabinets can cause cable connections to loosen. Cable vibration primarily originates from the mechanical vibrations generated by heavy mining equipment during operation, which are transmitted to the cable system via the ground, supports, and other pathways. The high-speed switching action of the IGBT modules inside the frequency converter generates high-frequency electromagnetic oscillations. This electromagnetic vibration, coupled with mechanical vibration, forms a composite vibration mode, exacerbating the cable's sway amplitude.

[0004] The loosening process at cable connections exhibits typical characteristics of mechanical fatigue. Under alternating stress, the internal conductors of multi-core cables experience microscopic slippage, which, over time, leads to a decrease in the contact pressure of the crimp terminals. The sag effect caused by the weight of large-section power cables amplifies the bending moment during vibration, subjecting the terminals to additional mechanical stress.

[0005] The cable extends into the frequency converter cabinet through the bottom of the cabinet for connection. Cable vibration will cause the cable to be pulled, resulting in the connection between the cable and the frequency converter cabinet being loosened due to vibration and pulling. Utility Model Content

[0006] The purpose of this utility model is to provide a frequency converter distribution cabinet for mining, which has the advantages of being able to dampen the cable and keep one end of the cable loose, preventing the cable from being laid taut and the connection between the cable and the frequency converter distribution cabinet body from being pulled loose due to cable vibration. It solves the problem that when the cable is connected by extending into the frequency converter distribution cabinet from the bottom, the cable vibration will cause the cable to be pulled and loosened at the connection between the cable and the frequency converter distribution cabinet for mining.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a frequency converter distribution cabinet for mining, comprising a frequency converter distribution cabinet body, a threaded rod one, a cable, bolts, a rotating rod, and a threaded rod two. A base is fixed to the lower surface of the frequency converter distribution cabinet body. A disc is installed inside the base, and a semi-circular frame is installed inside the disc. A rubber pad is fixed inside the semi-circular frame. The top end of the cable extends into the frequency converter distribution cabinet body for connection. The rubber pad clamps and restricts the cable. Vibration damping devices are installed at the front and rear ends of one side of the base. A bracket is fixed to one side of the vibration damping device. A groove is formed on the upper surface of the bracket. A rotating shaft is rotatably connected to the front and rear ends of the inner wall of the groove. A winding roller is fixed to the rear end of the rotating shaft, and the cable is wound on the winding roller.

[0008] Preferably, the lower surface of the frequency converter cabinet body has a through hole, the lower surface of the base has a through groove two, the front and rear ends of the base have heat dissipation vents, one side of the base has a through groove one, and the upper surface of the bracket one has a through groove three. The top end of the cable extends into the frequency converter cabinet body through the through hole for connection, and one side of the cable passes through through groove one and through groove three. The through hole facilitates the insertion of the top end of the cable into the frequency converter cabinet body for connection, while through grooves one and two facilitate the winding of one side of the cable onto a take-up roller.

[0009] Preferably, a bracket two is fixed to the rear end of the inner wall of the through groove two. A groove two is formed at the front end of the bracket two. Threaded holes two are formed at the upper and lower ends of the bracket two. An insert plate is inserted into the groove two. A threaded hole three is formed on the upper surface of the insert plate. The bottom end of the bolt passes through threaded holes two and three and is threaded. By having the bottom end of the bolt pass through threaded holes two and three and is threaded, it is convenient to install and disassemble the disc.

[0010] Preferably, a connecting plate is fixed to the front end of the insert plate, and a disc is fixed to the front end of the connecting plate. A circular hole is formed on the upper surface of the disc, and threaded holes are formed on both sides of the disc. A threaded rod passes through one of the threaded holes and is threadedly connected, while also extending into the circular hole. A semi-circular frame is rotatably connected to one side of the threaded rod, and a mounting groove is formed on one side of the semi-circular frame. A rubber pad is fixed to the inner wall of the mounting groove. By passing through the threaded hole and being threadedly connected, rotating the threaded rod allows the two semi-circular frames to move as needed, enabling the two rubber pads to clamp and constrain the cable.

[0011] Preferably, the support frame has a second circular hole at its front end, the rear end of the rotating rod extends into the second circular hole and is rotatably connected, a rotating shaft is fixed to the rear end of the rotating rod, and a turntable is fixed to the front end of the rotating rod. By extending the rotating rod into the second circular hole and rotatably connecting it, the winding roller can be rotated as needed, allowing the cable to be wound up and unwound as required.

[0012] Preferably, the turntable has a threaded groove at its front end, the bracket has a bracket three fixed to its front end, the bracket three has a groove three on its upper surface, the bracket three has a threaded hole four at its front end, the threaded rod two extends through the threaded hole four into the threaded groove and is threadedly connected, and the turntable two is fixed to the front end of the threaded rod two. By extending through the threaded hole four into the threaded groove and being threadedly connected, the threaded rod two can be rotated to extend into the threaded groove and be threadedly connected, thus limiting the winding roller and preventing it from rotating.

[0013] Preferably, the cable between the support bracket and the disc is bent. By bending the cable between the support bracket and the disc, the cable can be partially moved when it vibrates, preventing the connection between the cable and the frequency converter cabinet body from being pulled loose.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This utility model features a rubber pad fixed inside a semi-circular frame. The top end of the cable extends into the variable frequency distribution cabinet body for connection. The rubber pad clamps and restricts the cable. Vibration damping devices are installed at the front and rear ends of one side of the base. A bracket is fixed to one side of the vibration damping device. A groove is formed on the upper surface of the bracket. The front and rear ends of the inner wall of the groove are rotatably connected to a rotating shaft. A winding roller is fixed to the rear end of the rotating shaft. The winding roller winds up the cable. When it is necessary to prevent the connection between the cable and the variable frequency distribution cabinet for mining from loosening due to vibration, the threaded rod is rotated to move the semi-circular frame and the rubber pad. The rubber pad clamps and restricts the cable. Then, the winding roller is rotated to release the cable wound on the winding roller, keeping the cable between the disc and the bracket loose. At the same time, when the cable vibrates, the vibrator dampens the vibration, achieving the effect of damping the cable and keeping one end of the cable loose, preventing the cable from being laid taut and the connection between the cable and the variable frequency distribution cabinet body from being pulled loose due to cable vibration. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a side view of the structure of this utility model;

[0018] Figure 3 This is a bottom view of the variable frequency distribution cabinet body of this utility model;

[0019] Figure 4 This is a top view of the base structure of this utility model;

[0020] Figure 5 This is a schematic cross-sectional view of the circular frame structure of this utility model;

[0021] Figure 6This is a cross-sectional view of the connecting plate of this utility model;

[0022] Figure 7 This is a cross-sectional view of the bracket of this utility model;

[0023] Figure 8 For the present utility model Figure 7 An enlarged structural diagram.

[0024] In the diagram: 1. Variable frequency distribution cabinet body; 2. Base; 3. Heat dissipation vent; 4. Vibration damping device; 5. Bracket 1; 6. Through slot 1; 7. Through hole; 8. Groove 1; 9. Through slot 2; 10. Threaded rod 1; 11. Disc; 12. Circular hole 1; 13. Semi-circular frame; 14. Rubber pad; 15. Mounting slot; 16. Threaded hole 1; 17. Cable; 18. Connecting plate; 19. Insert plate; 20. Bracket 2; 21. Threaded hole 2; 22. Threaded hole 3; 23. Groove 2; 24. Bolt; 25. Shaft; 26. Through slot 3; 27. Circular hole 2; 28. Rotating rod; 29. ​​Turntable 1; 30. Bracket 3; 31. Groove 3; 32. Turntable 2; 33. Threaded rod 2; 34. Threaded hole 4; 35. Threaded groove; 36. Take-up roller. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1 to 8 The present invention provides two embodiments:

[0027] Example 1: A frequency conversion distribution cabinet for mining includes a frequency conversion distribution cabinet body 1, a threaded rod 10, a cable 17, a bolt 24, a rotating rod 28, and a threaded rod 33. A base 2 is fixed to the lower surface of the frequency conversion distribution cabinet body 1. A disc 11 is installed inside the base 2. A semi-circular frame 13 is installed inside the disc 11. A rubber pad 14 is fixed inside the semi-circular frame 13. The top end of the cable 17 extends into the frequency conversion distribution cabinet body 1 for connection. The rubber pad 14 clamps and restricts the cable 17. Vibration damping devices 4 are installed at the front and rear ends of one side of the base 2. A bracket 5 is fixed to one side of the vibration damping device 4. A groove 8 is opened on the upper surface of the bracket 5. A rotating shaft 25 is rotatably connected to the front and rear ends of the inner wall of the groove 8. A winding roller 36 is fixed to the rear end of the rotating shaft 25. The cable 17 is wound on the winding roller 36.

[0028] Vibration damping device 4 uses a spring vibration damper, a common type of passive vibration damper. Its core structure consists of a metal helical spring, damping elements, and upper and lower connecting plates. Some models also include rubber buffer pads or anti-slip seats to enhance stability. The metal spring, as the main load-bearing component, is usually made of high-carbon steel or stainless steel wound into a helical shape, utilizing the material's elastic deformation ability to absorb vibration energy. The damping elements are mostly made of viscous oil, friction plates, or high-damping rubber, dissipating energy through internal friction or fluid resistance.

[0029] When external vibrations are transmitted to the shock absorber, the spring first undergoes compression or stretching deformation, temporarily storing the mechanical vibration energy as elastic potential energy. Because the spring itself has relatively low damping, the vibration continues in a periodic reciprocating motion. At this point, the damping element begins to function—for example, in a hydraulic damper, the piston pushes the oil through a narrow flow channel to generate viscous resistance, or the friction between rubber molecular chains is converted into heat energy, thereby gradually consuming the vibration energy and suppressing the residual oscillation of the spring.

[0030] The lower surface of the variable frequency distribution cabinet body 1 is provided with a through hole 7, the lower surface of the base 2 is provided with a through groove 2 9, the front and rear ends of the base 2 are respectively provided with heat dissipation vents 3, the side of the base 2 is provided with a through groove 1 6, the upper surface of the bracket 1 5 is provided with a through groove 3 26, the top end of the cable 17 extends into the variable frequency distribution cabinet body 1 through the through hole 7 and is connected, and the side of the cable 17 passes through the through groove 1 6 and the through groove 3 26.

[0031] A bracket 20 is fixed to the rear end of the inner wall of the through groove 29. A groove 23 is opened at the front end of the bracket 20. Threaded holes 21 are opened at the upper and lower ends of the bracket 20 respectively. Insert plate 19 is inserted into the groove 23. Threaded holes 32 are opened on the upper surface of the insert plate 19. The bottom end of the bolt 24 passes through threaded holes 21 and 32 and is threaded.

[0032] A connecting plate 18 is fixed to the front end of the insert plate 19, and a disc 11 is fixed to the front end of the connecting plate 18. A circular hole 12 is opened on the upper surface of the disc 11, and threaded holes 16 are opened on both sides of the disc 11. A threaded rod 10 passes through the threaded hole 16 on one side and is threadedly connected, while extending into the circular hole 12. A semi-circular frame 13 is rotatably connected to one side of the threaded rod 10. An installation groove 15 is opened on one side of the semi-circular frame 13, and a rubber pad 14 is fixed to the inner wall of the installation groove 15.

[0033] The rubber pad 14 can clamp and restrict the cable 17, thereby limiting the upper end of the cable 17 and preventing vibration on one side of the cable 17 from causing vibration and loosening at the connection between the cable 17 and the frequency converter cabinet body 1. At the same time, the rubber pad 14 can prevent damage caused by clamping the cable 17.

[0034] In this embodiment, when it is necessary to prevent the connection between the cable 17 and the variable frequency distribution cabinet body 1 from loosening due to vibration, the plug plate 19 is inserted into the groove 23, the bottom end of the bolt 24 passes through the threaded hole 21 and the threaded hole 22 and is threaded together, the top end of the cable 17 passes through the through hole 7 and extends into the variable frequency distribution cabinet body 1 for connection, and then the threaded rod 10 is rotated so that the semi-circular frame 13 and the rubber pad 14 can be moved as needed, so that the two rubber pads 14 clamp and limit the cable 17, thereby achieving the goal of clamping and limiting the cable 17 and preventing the connection between the cable 17 and the variable frequency distribution cabinet body 1 from loosening due to vibration.

[0035] Example 2:

[0036] The front end of bracket 15 has a circular hole 27, the rear end of rotating rod 28 extends into the circular hole 27 and is rotatably connected, the rear end of rotating rod 28 is fixed with a rotating shaft 25, and the front end of rotating rod 28 is fixed with a turntable 29;

[0037] Turntable 1 29 has a threaded groove 35 at its front end. Support 1 5 has a support 3 30 fixed at its front end. Support 3 30 has a groove 31 on its upper surface. Support 3 30 has a threaded hole 4 34 at its front end. Threaded rod 2 33 extends through threaded hole 4 34 into threaded groove 35 and is threaded. Turntable 2 32 is fixed at the front end of threaded rod 2 33.

[0038] The threaded rod 33 passes through the threaded hole 34 and extends into the threaded groove 35, and is threadedly connected, so that the take-up roller 36 can be limited.

[0039] The cable 17 between bracket 5 and disc 11 is bent;

[0040] The cable 17 between bracket 5 and disc 11 is bent. When the cable 17 vibrates, the bent part of the cable 17 expands and contracts, and will not cause the connection between the cable 17 and the variable frequency distribution cabinet body 1 to vibrate and loosen.

[0041] In this embodiment, when it is necessary to prevent the connection between the cable 17 and the variable frequency distribution cabinet body 1 from loosening due to vibration, the rotating rod 28 is rotated to make the take-up roller 36 rotate, and the cable 17 is unloaded, so that the cable 17 between the support 5 and the disc 11 remains bent. Then the threaded rod 33 is rotated so that the threaded rod 33 extends into the threaded groove 35 and is threadedly connected, thereby limiting the take-up roller 36. When the cable 17 vibrates, the vibration damping device 4 can dampen the cable 17. At the same time, the bent part of the cable 17 is stretched, so that the connection between the cable 17 and the variable frequency distribution cabinet body 1 will not be pulled and loosened.

[0042] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A frequency converter switchgear for mining, comprising a switchgear body (1), a first threaded rod (10), a cable (17), a bolt (24), a rotating rod (28), and a second threaded rod (33), characterized in that: A base (2) is fixed on the lower surface of the variable frequency distribution cabinet body (1). A disc (11) is installed inside the base (2). A semi-circular frame (13) is installed inside the disc (11). A rubber pad (14) is fixed inside the semi-circular frame (13). The top end of the cable (17) extends into the variable frequency distribution cabinet body (1) and is connected. The rubber pad (14) clamps and limits the cable (17). Vibration damping devices (4) are installed at the front and rear ends of one side of the base (2). A bracket (5) is fixed on one side of the vibration damping device (4). A groove (8) is opened on the upper surface of the bracket (5). A rotating shaft (25) is rotatably connected to the front and rear ends of the inner wall of the groove (8). A winding roller (36) is fixed at the rear end of the rotating shaft (25). The cable (17) is wound on the winding roller (36).

2. The frequency conversion distribution cabinet for mining as described in claim 1, characterized in that: The variable frequency distribution cabinet body (1) has a through hole (7) on its lower surface, the base (2) has a through groove (9) on its lower surface, the base (2) has heat dissipation vents (3) at its front and rear ends, the base (2) has a through groove (6) on one side, the bracket (5) has a through groove (26) on its upper surface, the cable (17) extends into the variable frequency distribution cabinet body (1) through the through hole (7) and is connected, and the cable (17) passes through the through groove (6) and the through groove (26) on one side.

3. A frequency conversion distribution cabinet for mining according to claim 2, characterized in that: A bracket (20) is fixed to the rear end of the inner wall of the through groove (9). The bracket (20) has a groove (23) at the front end. The bracket (20) has threaded holes (21) at both the upper and lower ends. A plate (19) is inserted into the groove (23). A threaded hole (22) is opened on the upper surface of the plate (19). The bottom end of the bolt (24) passes through the threaded hole (21) and the threaded hole (22) and is threaded.

4. A frequency conversion distribution cabinet for mining according to claim 3, characterized in that: The front end of the insert plate (19) is fixed with a connecting plate (18), and the front end of the connecting plate (18) is fixed with a disc (11). The upper surface of the disc (11) is provided with a circular hole (12), and the two sides of the disc (11) are respectively provided with threaded holes (16). The threaded rod (10) passes through the threaded hole (16) on one side and is threadedly connected, while extending into the circular hole (12). The threaded rod (10) is rotatably connected to a semi-circular frame (13) on one side, and a mounting groove (15) is provided on one side of the semi-circular frame (13). A rubber pad (14) is fixed to the inner wall of the mounting groove (15).

5. A frequency conversion distribution cabinet for mining according to claim 1, characterized in that: The bracket (5) has a circular hole (27) at its front end. The rear end of the rotating rod (28) extends into the circular hole (27) and is rotatably connected. The rear end of the rotating rod (28) is fixed with a rotating shaft (25), and the front end of the rotating rod (28) is fixed with a turntable (29).

6. A frequency conversion distribution cabinet for mining according to claim 5, characterized in that: The turntable 1 (29) has a threaded groove (35) at its front end. The bracket 1 (5) has a bracket 3 (30) fixed at its front end. The bracket 3 (30) has a groove 3 (31) on its upper surface. The bracket 3 (30) has a threaded hole 4 (34) at its front end. The threaded rod 2 (33) extends through the threaded hole 4 (34) into the threaded groove (35) and is threaded. The turntable 2 (32) is fixed at the front end of the threaded rod 2 (33).

7. A frequency conversion distribution cabinet for mining according to claim 1, characterized in that: The cable (17) between the bracket (5) and the disc (11) is bent.

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