Speed regulation control device for three-phase asynchronous motor

Abstract

The utility model provides a speed regulation control device for a three-phase asynchronous motor, and relates to the technical field of speed regulation control devices.The speed regulation control device comprises a device body and a replacement box, the device body is used for speed regulation control, the replacement box is arranged in the device body, the replacement box is arranged in the device body, and a replacement groove is formed in the replacement box; a filter screen is mounted in the replacement tank; according to the technical scheme, when dust accumulated on a filter screen affects the heat dissipation effect of a device body and needs to be treated, the filter screen in a replacement groove formed in a replacement box is pulled out, after the filter screen is pulled out, a new filter screen is pushed into the replacement groove, and the filter screen is slidably connected with the replacement groove, so that the filter screen can be conveniently replaced. And after the whole filter screen enters the replacement groove, the filter screen is fixed into the replacement groove through buckles at the two ends of one side of the filter screen, and the situation that the device body cannot work normally due to the fact that dust enters the device body is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of speed control devices, in particular to a speed control device for a three-phase asynchronous motor. Background Art

[0002] When the speed changes due to the external power supply voltage or load fluctuations of the speed control device, the output signal of the tachometer generator coaxially connected to the motor is compared with the speed setting signal through an integrator. The error is amplified and the zero-crossing trigger signal is used to drive the phase-shift trigger to realize automatic voltage adjustment, so that the speed is stabilized at the given value. When the direction needs to be changed, it is only necessary to swap the forward and reverse connectors of the motor. Nowadays, cranes and cranes are widely used in industrial production workshops, freight centers, container terminals, highway bridges and railway construction. In recent years, the country has advocated the construction of an energy-saving and environmentally friendly economy.

[0003] A motor speed control device with publication number CN215010103U. When it is necessary to clean the dust on the heat dissipation hole in time, the operating block is rotated to drive the bidirectional threaded rod to rotate. The rotation of the bidirectional threaded rod will cause the two sliding blocks to slide along the rectangular groove. The two sliding blocks sliding toward each other will drive the brush rod to slide toward each other. Under the reaction force of the first spring, the brush rod will fit more tightly with the outer surface of the heat dissipation hole, and the brush rod can slide to clean the dust on the outer surface of the heat dissipation hole.

[0004] However, in the process of implementing the above technical solution, it was found that the above technical solution had the following technical problems:

[0005] When the existing motor speed control device cleans the dust from the internal heat dissipation holes, the brush sweeps on the surface of the heat dissipation holes to clean the dust on the surface of the heat dissipation holes. However, when the brush is cleaning, a lot of dust will enter the heat dissipation holes with the help of the force of the brush, and then block the heat dissipation holes, resulting in untimely heat dissipation. Utility Model Content

[0006] In order to overcome the problem that when the existing motor speed control device cleans the dust in the internal heat dissipation holes, the brush sweeps on the surface of the heat dissipation holes to clean the dust on the surface of the heat dissipation holes. However, when the brush is cleaning, a lot of dust will enter the heat dissipation holes with the help of the force of the brush, and then block the heat dissipation holes, resulting in untimely and insufficient heat dissipation. The embodiment of the present application provides a speed control device for a three-phase asynchronous motor. When the dust accumulated on the filter affects the heat dissipation effect of the device body and the filter needs to be processed, the filter inside the replacement slot opened in the replacement box inside the device body is pulled out. When the filter needs to be replaced with a new filter inside the replacement box after the filter is pulled out, the new filter is pushed into the replacement slot, and the filter is slidably connected to the replacement slot, so that it is more convenient to replace the filter. After the filter enters the replacement slot as a whole, the filter is fixed to the inside of the filter by the buckles at both ends of one side of the filter to prevent dust from entering the inside of the device body and causing the device body to fail to work normally.

[0007] The technical solution adopted by the embodiment of the present application to solve the technical problem is:

[0008] A speed control device for a three-phase asynchronous motor, comprising a device body;

[0009] A replacement box is arranged inside the device body;

[0010] Among them, a replacement box is arranged inside the device body, a replacement slot is opened inside the replacement box, a filter is installed inside the replacement slot, the filter is slidably connected to the replacement slot, and both ends of one side of the filter are fixedly connected with buckles.

[0011] In a possible implementation, both ends of one side of the replacement box are provided with card slots, and the buckle is slidably connected to the card slots.

[0012] In a possible implementation, an air exchange port is provided on one side of the exterior of the device body, and one side of the air exchange port is in contact with one side of the filter screen.

[0013] In a possible implementation, fixed blocks are installed on the surfaces of the four corners of the device body, and a sliding groove is opened in the middle of the fixed block.

[0014] In a possible implementation, a sliding rod is slidably connected to the interior of the sliding groove, and a limiting plate is fixedly connected to the bottom of the sliding rod.

[0015] In a possible implementation, the upper end of the sliding rod is fixedly connected to a lifting rod, both ends of the lifting rod are provided with fixing grooves, and the interior of the fixing groove is connected to the sliding rod.

[0016] In a possible implementation, an adjustment gauge is disposed on one side of the device body, and an adjustment button is disposed at the lower end of the adjustment gauge.

[0017] In summary, the present invention includes at least one of the following beneficial technical effects:

[0018] 1. When the dust accumulated on the filter affects the heat dissipation effect of the device body and the filter needs to be processed, the filter inside the replacement slot opened in the replacement box is pulled out, and the new filter is pushed into the replacement slot after the filter is pulled out. The filter is connected to the replacement slot by sliding, making it more convenient to replace the filter. After the filter enters the replacement slot as a whole, the filter is fixed in the replacement slot by the buckles at both ends of one side of the filter to prevent dust from entering the device body and causing the device body to malfunction;

[0019] 2. Change the working place by lifting the device body. When the working place of the device body needs to be changed, pull the lifting rod upward. The lifting rod pulls upward to drive the sliding rods fixedly connected to the fixed grooves at both ends to move upward. The sliding rod moves upward to drive the limit plate at the bottom to move upward. The limit plate moves upward and contacts the bottom of the fixed block. The upward force of the sliding rod drives the device body to be lifted upward, making it more convenient to replace the position of the device body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is one of the overall structural diagrams of the utility model;

[0021] Figure 2 This is the second schematic diagram of the overall structure of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the utility model when the device body and the replacement box are separated.

[0023] Description of the drawings: 1. Device body; 2. Replacement box; 3. Replacement slot; 4. Filter; 5. Buckle; 6. Slot; 7. Air outlet; 8. Fixed block; 9. Sliding slot; 10. Sliding rod; 11. Limit plate; 12. Fixed slot; 13. Adjustment table; 14. Lifting rod; 15. Adjustment button. DETAILED DESCRIPTION

[0024] The technical solution in the embodiment of the present application is to solve the problems of the above-mentioned background technology, and the overall idea is as follows:

[0025] Embodiment 1:

[0026] This embodiment introduces a specific structure of a speed control device for a three-phase asynchronous motor. Figure 1-Figure 3As shown, it includes a device body 1 and a replacement box 2, the replacement box 2 is arranged inside the device body 1, the replacement box 2 is arranged inside the device body 1, a replacement slot 3 is opened inside the replacement box 2, a filter screen 4 is installed inside the replacement slot 3, the filter screen 4 is slidably connected to the replacement slot 3, and buckles 5 are fixedly connected at both ends of one side of the filter screen 4;

[0027] When the dust accumulated on the filter 4 affects the heat dissipation effect of the device body 1 and the filter 4 needs to be processed, the filter 4 in the replacement slot 3 opened in the replacement box 2 is pulled out, and after the filter 4 is pulled out, a new filter 4 is pushed into the replacement slot 3. The filter 4 is connected to the replacement slot 4 by sliding, which makes it more convenient to replace the filter 4. After the filter 4 enters the replacement slot 3 as a whole, the filter 4 is fixed in the replacement slot 3 by the buckles 5 at both ends of one side of the filter 4, so as to prevent dust from entering the device body 1 and causing the device body 1 to fail to work normally.

[0028] At the same time, when the dust on the filter 4 affects the heat dissipation effect of the device body 1, the filter needs to be replaced. The filter 4 is pulled out from the replacement slot 3 opened in the replacement box 2. After the filter 4 is pulled out, the new filter 4 is pushed into the replacement slot 3. The filter 4 is connected to the replacement slot 4 by sliding, which makes it more convenient to replace the filter 4. After the filter 4 enters the replacement slot 3 as a whole, the buckles 5 at both ends of one side of the filter 4 are fixedly connected with the card slots 6 at both ends of one side of the replacement box 2, so that the filter 4 is fixed in the replacement slot 3, so as to prevent the filter 4 from shaking inside the device body 1, thereby leaking the dust of the filter 4 into the device body 1, causing the device body 1 to fail to work normally.

[0029] Secondly, when the device body 1 is working, the air exchange port 7 on the external side of the device body 1 is used to dissipate heat from the inside of the device body 1. Dust generated during the heat dissipation process will enter the air exchange port 7. The dust enters the air exchange port 7 and falls on the filter net 4 that is in contact with the air exchange port 7, thereby preventing dust from entering the device body 1 and damaging the components inside the device body 1, causing the device body 1 to fail to work normally.

[0030] By adopting the above technical solution:

[0031] In the above design, when the dust accumulated on the filter 4 affects the heat dissipation effect of the device body 1 and the filter 4 needs to be processed, the filter 4 inside the replacement slot 3 opened in the replacement box 2 is pulled out, and after the filter 4 is pulled out, the new filter 4 is pushed into the replacement slot 3. The filter 4 is connected to the replacement slot 4 by sliding, which makes the replacement of the filter 4 more convenient. After the filter 4 enters the replacement slot 3 as a whole, the filter 4 is fixed in the replacement slot 3 by the buckles 5 at both ends of one side of the filter 4, so as to prevent dust from entering the device body 1 and causing the device body 1 to malfunction.

[0032] Embodiment 2:

[0033] Based on Example 1, this example introduces the specific structure of the device body. The upper end of the sliding rod 10 is fixedly connected to a lifting rod 14. Both ends of the lifting rod 14 are provided with a fixing groove 12. The interior of the fixing groove 12 is connected to the sliding rod 10.

[0034] Among them, when the device body 1 needs to change the usage position, the lifting rod 14 is pulled upward, and the lifting rod 14 is pulled upward to drive the sliding rod 10 with the fixed grooves 12 at both ends to move upward. The sliding rod 10 moves upward and is slidably connected with the sliding grooves 9 opened in the middle of the fixed blocks 8 fixedly installed on both sides of the device body 1, so that the sliding rod 10 is more stable when moving. The sliding rod 10 moves upward and drives the limiting plate 11 at the bottom to move upward. After the limiting plate 11 moves to fit with the bottom of the fixed block 8, it limits the sliding rod 10 from continuing to move upward. After the limiting plate 11 fits with the bottom of the fixed block 8, it withstands the pulling force of the staff, so that the device body 1 is lifted, and the lifted device body 1 can be placed in other occasions where needed.

[0035] The user's operation steps are:

[0036] S1. When the device body 1 is working, the air exchange port 7 on one side of the outside of the device body 1 is used to dissipate heat inside the device body 1. Dust generated during the heat dissipation process will enter the air exchange port 7. The dust enters the air exchange port 7 and falls on the filter 4 attached to the air exchange port 7, thereby preventing dust from entering the device body 1 and damaging the components inside the device body 1, causing the device body 1 to fail to work normally.

[0037] S2. When the dust accumulated on the filter 4 affects the heat dissipation effect of the device body 1 and the filter 4 needs to be processed, the filter 4 in the replacement slot 3 opened in the replacement box 2 is pulled out, and after the filter 4 is pulled out, a new filter 4 is pushed into the replacement slot 3. After the filter 4 enters the replacement slot 3 as a whole, the buckles 5 at both ends of one side of the filter 4 are fixedly connected with the card slots 6 at both ends of one side of the replacement box 2, so that the filter 4 is fixed in the replacement slot 3, so as to prevent the filter 4 from shaking inside the device body 1, thereby leaking the dust of the filter 4 into the device body 1;

[0038] S3. When the lifting rod 14 is pulled upward, the lifting rod 14 drives the sliding rod 10 fixedly connected to the fixing grooves 12 at both ends to move upward. The upward movement of the sliding rod 10 drives the limiting plate 11 at the bottom to move upward. The limiting plate 11 moves upward and contacts the bottom of the fixed block 8. The upward force of the sliding rod 10 drives the device body 1 to be lifted upward, making it more convenient to change the position of the device body 1.

[0039] By adopting the above technical solution:

[0040] With the above design, when the device body 1 needs to change its usage position, the staff will hold the lifting rod 14 and pull it upward. The lifting rod 14 is pulled upward to drive the sliding rod 10 with the fixed grooves 12 at both ends to move upward. The sliding rod 10 moves upward and is slidably connected with the sliding grooves 9 opened in the middle of the fixed blocks 8 fixedly installed on both sides of the device body 1, so that the sliding rod 10 is more stable when moving. The sliding rod 10 moves upward and drives the limiting plate 11 at the bottom to move upward. The limiting plate 11 moves upward and contacts the bottom of the fixed block 8. The upward force of the sliding rod 10 drives the device body 1 to be lifted upward, and the lifted device body 1 can be placed in other occasions as needed.

[0041] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A speed control device for a three-phase asynchronous motor, characterized in that: include: Device body(1); A replacement box (2) is arranged inside the device body (1); The device body (1) is provided with a replacement box (2) inside, a replacement slot (3) is provided inside the replacement box (2), a filter screen (4) is installed inside the replacement slot (3), the filter screen (4) is slidably connected to the replacement slot (3), and buckles (5) are fixedly connected at both ends of one side of the filter screen (4).

2. A speed control device for a three-phase asynchronous motor as claimed in claim 1, characterized in that: Both ends of one side of the replacement box (2) are provided with card slots (6), and the buckle (5) is slidably connected to the card slots (6).

3. A speed control device for a three-phase asynchronous motor as claimed in claim 1, characterized in that: An air exchange port (7) is provided on one side of the exterior of the device body (1), and one side of the air exchange port (7) is in contact with one side of the filter screen (4).

4. A speed control device for a three-phase asynchronous motor as claimed in claim 1, characterized in that: Fixed blocks (8) are installed on the surfaces of the four corners of the device body (1), and a sliding groove (9) is provided in the middle of the fixed block (8).

5. A speed control device for a three-phase asynchronous motor as claimed in claim 4, characterized in that: The interior of the sliding groove (9) is slidably connected to a sliding rod (10), and the bottom of the sliding rod (10) is fixedly connected to a limiting plate (11).

6. A speed control device for a three-phase asynchronous motor as claimed in claim 5, characterized in that: The upper end of the sliding rod (10) is fixedly connected to a lifting rod (14), both ends of the lifting rod (14) are provided with fixing grooves (12), and the interior of the fixing groove (12) is connected to the sliding rod (10).

7. A speed control device for a three-phase asynchronous motor as claimed in claim 1, characterized in that: An adjustment gauge (13) is provided on one side of the device body (1), and an adjustment button (15) is provided at the bottom of the adjustment gauge (13).

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