Elevator control mechanism based on three-level power converter

Abstract

The utility model relates to the technical field of power converters, in particular to an elevator control mechanism based on a three-level power converter, which comprises a mounting frame, a connecting shell is fixed on one side of the top end of the mounting frame, fixing frames are connected on two sides of the outer wall of the mounting frame, and an anti-falling mechanism is arranged above the mounting frame; the anti-disengaging mechanism comprises a sliding block, the sliding block is slidably connected to the interior of the connecting shell, a damper is installed at the end, penetrating into the connecting shell, of the sliding block, and a rotating plate is rotationally connected to the interior of the sliding block. The two rotating plates are pulled, the sliding block slides along the connecting shell, so that the connecting plate is shrunk along the telescopic plate, then the rotating plates are rotated and loosened, the sliding block drives the rotating plates to penetrate into the limiting plate to be limited through pushing of the damper, resetting is avoided, and meanwhile the pressing block is elastically pushed through cooperation with the first damping spring; and the connecting cable is pressed on the elastic cushion, so that the cable is prevented from loosening when shaking or vibration occurs.

Description

Technical Field

[0001] The utility model relates to the technical field of power converters, in particular to an elevator control mechanism based on a three-level power converter. Background Art

[0002] Compared with the traditional two-level converter, the three-level power converter has the advantages of low voltage stress on power devices, low voltage change rate dv / dt, good output waveform harmonic characteristics, low switching frequency and high efficiency, and is particularly suitable for applications including elevator drive systems. However, during operation, the power switches that constitute the three-level power converter may fail due to thermal cycles, collector overcurrent or gate drive failure, resulting in failure of the entire device. The structure of the three-level power converter determines that when the power switch fails, the fault-tolerant control of the three-level power converter can be achieved by appropriately adjusting its control method.

[0003] The patent specification with announcement number CN212151252U discloses an elevator control device based on a three-level power converter, including a converter frame, a bolt plate and a threaded frame, protective frames are arranged on both sides of the converter frame, and mounting frames are arranged on both sides of the protective frame, a positioning bolt is arranged on the top of the converter frame, the bottom end of the converter frame is connected to an end frame, and slide frames are arranged on both sides of the end frame, a cross frame is installed on the inner side of the slide frame, the bottom end of the cross frame is connected to a heat dissipation grid frame, and a snap-fit ​​frame is arranged at the bottom end of the heat dissipation grid frame, and a closed frame is arranged at the bottom end of the snap-fit ​​frame. The beneficial effect of the utility model is that when the closed frame is fixedly connected between the sliding rods, the thread of the bolt column can be penetrated and buckled between the sliding rod and the slide frame, effectively distributing the evenly distributed terminal frames on the sliding rod, which is beneficial to installing the terminal frame protection between the closed frame and the snap-fit ​​frame, which is beneficial to the elevator operation control and prevents the aging and breakage of the connecting wires during long-term use.

[0004] However, in the implementation of relevant technologies, it was found that the elevator control device based on the three-level power converter of the above design has the following problems: although the prior art uses components such as a reset spring and a rubber frame to prevent the connecting wire from aging and breaking due to long-term use, during actual use, the connection of the connecting wire is easily vibrated and detached or disconnected, resulting in poor connection contact and thus affecting the use of the power converter. In view of this, an elevator control mechanism based on a three-level power converter is provided to overcome the above defects. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes an elevator control mechanism based on a three-level power converter.

[0006] In order to achieve the above object, the utility model adopts the following technical solution: an elevator control mechanism based on a three-level power converter, comprising a mounting frame, a connection shell is fixed to one side of the top of the mounting frame, and fixing frames are connected to both sides of the outer wall of the mounting frame, and an anti-slip mechanism is arranged above the mounting frame;

[0007] The anti-slip mechanism includes a slider, which is slidably connected to the inside of a connecting shell, and a damper is installed at one end of the slider that penetrates into the connecting shell, the slider is rotatably connected to a rotating plate, and a connecting plate is fixed to one side of the rotating plate, the outer wall of the connecting plate is evenly and equidistantly embedded with a first damping spring, and a telescopic plate is passed through the inside of the connecting plate at one end of the connecting plate away from the rotating plate, the connecting shell is fixed with limiting plates on both sides of the outer wall of the slider, and an elastic pad is arranged between the two limiting plates on the outer wall of the connecting shell, and the rotating plate after being limited and rotated by the limiting plate allows the connecting plate to elastically push the pressing block through the first damping spring, and press the cable on the elastic pad for tightening and pressing, to avoid shaking and loosening of the connector, thereby ensuring the stability of the connection.

[0008] As a further description of the above technical solution: the slider forms a sliding structure between the damper and the connecting shell, and the connecting shell is bonded to the elastic pad. The slider slides along the connecting shell, so that the rotating plate avoids the limit plate, and then releases the damper to push the rotating plate into the limit plate for limitation.

[0009] As a further description of the above technical solution: a second damping spring is fixed inside the mounting frame, and a cover plate is fixed to the front end of the mounting frame by bolts. When the power converter is located in the mounting frame, the second damping spring elastically pushes the power converter to be pressed against the cover plate, thereby achieving a shock-absorbing effect.

[0010] As a further description of the above technical solution: clamping blocks are fixed on both sides of the outer wall of the cover plate facing the second damping spring, and a support plate is provided on one side of the second damping spring inside the mounting frame. The two clamping blocks are used to limit the position of the power converter to avoid shaking. At the same time, the support plate cooperates to prevent the power converter and the mounting frame from being too close, which prevents air from circulating and heat dissipation.

[0011] As a further description of the above technical solution: a dust shield is connected to one side of the top of the connecting shell, and a cleaning mechanism is provided on the other side of the top of the connecting shell. The dust shield protects the connecting shell through the dust shield to prevent dust from falling into the connecting shell and entering the mounting frame, and being adsorbed to the power converter, thereby preventing it from dissipating heat.

[0012] As a further description of the above technical solution: the cleaning mechanism includes a motor, which is embedded in one side of the outer wall of the connecting shell, and a worm is connected to the power output end of the motor, a filter plate is embedded in the end of the connecting shell facing the worm, and a rotating rod is passed through the filter plate, a fan blade is fixed on the end of the rotating rod located inside the connecting shell, and a scraper is fixed on the outer wall of the rotating rod that fits the filter plate, a worm gear is sleeved on one end of the rotating rod located on the worm, and the worm is driven by the operation of the motor to push the worm gear, so that the rotating rod drives the fan blades to rotate, thereby improving the air circulation inside the mounting frame and achieving a heat dissipation effect.

[0013] As a further description of the above technical solution: the scraper blade fits tightly against the filter plate, and a rotating structure is formed between the scraper blade and the filter plate. When the rotating rod rotates, the scraper blade is driven to rotate in conjunction with the filter plate to scrape off the dust and impurities filtered and adsorbed by the filter plate to avoid blockage that affects air circulation.

[0014] The utility model has the following beneficial effects:

[0015] The utility model designs an elevator control mechanism based on a three-level power converter. The two rotating plates are pulled and slide along a connecting shell via a slider, so that the connecting plate is contracted along a telescopic plate. The rotating plates are then rotated and released. The slider drives the rotating plates to penetrate into a limiting plate for limiting and avoiding resetting via a damper. At the same time, a first damping spring elastically pushes a pressing block to press a connecting cable onto an elastic pad to avoid loosening of the cable when shaking or vibrating occurs.

[0016] The utility model designs an elevator control mechanism based on a three-level power converter. A motor drives a worm to push a worm wheel, which drives a rotating rod to rotate under the clamping of a filter plate, thereby driving a fan blade to rotate to improve the air circulation inside a mounting frame for heat dissipation, and filters the circulating dust and impurities through the filter plate. The rotating rod simultaneously drives a scraper to rotate in contact with the filter plate to scrape off the accumulated dust and impurities to avoid blockage that affects the air circulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the mounting frame of the utility model;

[0019] Figure 3 This is a schematic diagram of the installation structure of the damper of the utility model;

[0020] Figure 4 This is a schematic diagram of the installation structure of the filter plate of the utility model.

[0021] Legend:

[0022] 1. Mounting frame; 2. Connecting shell; 3. Fixing frame; 4. Anti-slip mechanism; 401. Rotating plate; 402. Connecting plate; 403. Telescopic plate; 404. First damping spring; 405. Sliding block; 406. Damper; 407. Limiting plate; 408. Elastic pad; 5. Second damping spring; 6. Cover plate; 7. Clamping block; 8. Support plate; 9. Dust shield plate; 10. Cleaning mechanism; 1001. Worm; 1002. Motor; 1003. Filter plate; 1004. Worm wheel; 1005. Rotating rod; 1006. Fan blade; 1007. Scraper. DETAILED DESCRIPTION

[0023] Reference Figure 1-4 The utility model provides an elevator control mechanism based on a three-level power converter: comprising a mounting frame 1, a connecting shell 2 is fixed to one side of the top of the mounting frame 1, fixing frames 3 are connected to both sides of the outer wall of the mounting frame 1, and an anti-slip mechanism 4 is arranged above the mounting frame 1;

[0024] The anti-slip mechanism 4 includes a slider 405, which is slidably connected to the inside of the connecting shell 2. A damper 406 is installed on one end of the slider 405 that penetrates into the connecting shell 2. The slider 405 is rotatably connected to a rotating plate 401 inside. A connecting plate 402 is fixed to one side of the rotating plate 401. The outer wall of the connecting plate 402 is evenly and equidistantly embedded with first damping springs 404. A telescopic plate 403 is inserted into the end of the connecting plate 402 away from the rotating plate 401. Limiting plates 407 are fixed on both sides of the outer wall of the slider 405 of the connecting shell 2. An elastic pad 408 is arranged between the two limiting plates 407 on the outer wall of the connecting shell 2. The rotating plate 401 is limited and rotated by the limiting plate 407, so that the connecting plate 402 elastically pushes the pressing block through the first damping spring 404, and the cable is pressed on the elastic pad 408 for tightening and pressing, so as to avoid shaking and loosening of the connector, thereby achieving connection stability.

[0025] As a further implementation scheme of the above technical scheme: the slider 405 forms a sliding structure with the connecting shell 2 through the damper 406, the connecting shell 2 is bonded to the elastic pad 408, and the slider 405 slides along the connecting shell 2, so that the rotating plate 401 avoids the limit plate 407, and then releases the damper 406 to push the rotating plate 401 into the limit plate 407 for limitation.

[0026] As a further implementation scheme of the above technical scheme: a second damping spring 5 is fixed inside the mounting frame 1, and a cover plate 6 is fixed to the front end of the mounting frame 1 by bolts. When the power converter is located in the mounting frame 1, the second damping spring 5 elastically pushes the power converter to be pressed against the cover plate 6, thereby achieving a shock-absorbing effect.

[0027] In specific implementation, after the cable is connected to the power converter inside the mounting frame 1, the two connecting plates 402 are extended and retracted via the telescopic plate 403, so that the slider 405 drives the rotating plate 401 to adjust the width. After avoiding the limit of the limit plate 407, the slider 405 is pushed to reset by the damper 406. At the same time, the rotating plate 401 is prevented from resetting by the limit of the limit plate 407. The first damping spring 404 embedded in the rotating plate 401 presses the connection limit on the elastic pad 408 via the pressing block to prevent loosening due to vibration during connection.

[0028] As a further implementation scheme of the above technical scheme: clamping blocks 7 are fixed on both sides of the outer wall of the cover plate 6 facing the second damping spring 5, and a support plate 8 is provided on one side of the second damping spring 5 inside the mounting frame 1. The two clamping blocks 7 are used to limit the position of the power converter to avoid shaking. At the same time, the support plate 8 cooperates to prevent the power converter and the mounting frame 1 from being too close, so that air cannot circulate and heat cannot be dissipated.

[0029] As a further implementation scheme of the above technical scheme: a dust shield 9 is connected to one side of the top of the connecting shell 2, and a cleaning mechanism 10 is provided on the other side of the top of the connecting shell 2. The dust shield 9 protects the connecting shell 2 to prevent dust from falling into the connecting shell 2 and entering the mounting frame 1, and being adsorbed to the power converter, thereby preventing it from dissipating heat.

[0030] As a further implementation scheme of the above technical scheme: the cleaning mechanism 10 includes a motor 1002, which is embedded in one side of the outer wall of the connecting shell 2, and the power output end of the motor 1002 is connected to the worm 1001, and the end of the connecting shell 2 facing the worm 1001 is embedded with a filter plate 1003, and a rotating rod 1005 is passed through the inside of the filter plate 1003, and a fan blade 1006 is fixed at one end of the rotating rod 1005 located inside the connecting shell 2, and a scraper 1007 is fixed at the position where the outer wall of the rotating rod 1005 is in contact with the filter plate 1003, and a worm wheel 1004 is sleeved on one end of the rotating rod 1005 located at the worm 1001. Through the operation of the motor 1002, the worm 1001 is driven to push the worm wheel 1004, so that the rotating rod 1005 drives the fan blade 1006 to rotate, thereby improving the air circulation inside the mounting frame 1 and achieving a heat dissipation effect.

[0031] As a further implementation scheme of the above technical scheme: the scraper 1007 is tightly fitted with the filter plate 1003, and a rotating structure is formed between the scraper 1007 and the filter plate 1003. When the rotating rod 1005 rotates, the scraper 1007 is driven to rotate in fit with the filter plate 1003, and the dust and impurities filtered and adsorbed by the filter plate 1003 are scraped off to avoid blockage affecting air circulation.

[0032] During specific implementation, the motor 1002 drives the worm 1001 to rotate, thereby pushing the worm wheel 1004 to drive the rotating rod 1005 to rotate, and the rotating rod 1005 drives the fan blade 1006 to rotate, thereby improving the internal air circulation of the mounting frame 1 for heat dissipation, and filtering external dust and impurities through the filter plate 1003. When the rotating rod 1005 rotates, it drives the scraper 1007 to scrape and clean the filtered dust and impurities.

[0033] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An elevator control mechanism based on a three-level power converter, characterized in that: It comprises a mounting frame (1), a connecting shell (2) is fixed to one side of the top end of the mounting frame (1), and fixing frames (3) are connected to both sides of the outer wall of the mounting frame (1), and an anti-slip mechanism (4) is arranged above the mounting frame (1); The anti-slip mechanism (4) comprises a slider (405), the slider (405) is slidably connected to the interior of the connecting shell (2), and a damper (406) is installed at one end of the slider (405) that penetrates into the connecting shell (2), the interior of the slider (405) is rotatably connected to a rotating plate (401), and a connecting plate (402) is fixed to one side of the rotating plate (401), the outer wall of the connecting plate (402) is evenly and equidistantly embedded with first damping springs (404), and a telescopic plate (403) is inserted into the interior of the end of the connecting plate (402) away from the rotating plate (401), and the connecting shell (2) is located on both sides of the outer wall of the slider (405) Fixed, and an elastic pad (408) is provided between the two limiting plates (407) on the outer wall of the connecting shell (2).

2. An elevator control mechanism based on a three-level power converter according to claim 1, characterized in that: The sliding block (405) forms a sliding structure with the connecting shell (2) via the damper (406), and the connecting shell (2) is bonded to the elastic pad (408).

3. The elevator control mechanism based on a three-level power converter according to claim 1, characterized in that: A second damping spring (5) is fixed inside the mounting frame (1), and a cover plate (6) is fixed to the front end of the mounting frame (1) via bolts.

4. The elevator control mechanism based on a three-level power converter according to claim 3, characterized in that: Clamping blocks (7) are fixed on both sides of the outer wall of the cover plate (6) facing the second damping spring (5), and a support plate (8) is arranged on one side of the second damping spring (5) inside the mounting frame (1).

5. The elevator control mechanism based on a three-level power converter according to claim 1, characterized in that: A dust shield (9) is connected to one side of the top end of the connecting shell (2), and a cleaning mechanism (10) is provided on the other side of the top end of the connecting shell (2).

6. The elevator control mechanism based on a three-level power converter according to claim 5, characterized in that: The cleaning mechanism (10) comprises a motor (1002), the motor (1002) being embedded in one side of the outer wall of the connecting shell (2), and the power output end of the motor (1002) being connected to a worm (1001), a filter plate (1003) being embedded in one end of the connecting shell (2) facing the worm (1001), and a rotating rod (1005) extending from the inside of the filter plate (1003), a fan blade (1006) being fixed to one end of the rotating rod (1005) located inside the connecting shell (2), and a scraper (1007) being fixed at a position where the outer wall of the rotating rod (1005) is in contact with the filter plate (1003), and a worm wheel (1004) is sleeved on one end of the rotating rod (1005) located on the worm (1001).

7. The elevator control mechanism based on a three-level power converter according to claim 6, characterized in that: The scraper (1007) is tightly fitted to the filter plate (1003), and a rotating structure is formed between the scraper (1007) and the filter plate (1003).

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